Hydrodynamic cut-off device

Abstract

The utility model discloses a hydrodynamic cut-off device which comprises a main body, a water inlet pipe and a water outlet pipe, the main body is provided with a leakage assembly, a grid bar and a stress assembly, the water inlet pipe is arranged above the main body, and the water outlet pipe is arranged below the main body. According to the utility model, the water power is utilized to control the sewage cut-off quantity under different drainage systems, the problem of overflow caused by overlarge cut-off quantity in rainy days is solved, and no need-to-control measures such as gates are used. The cut-off device is high in adaptability, can be used for the front ends, the middle ends or the tail ends of community exits, confluence and rainwater main pipes and main pipes, and is easy to construct. The elevation of the intercepting device is matched with water level control, so that the sewage concentration can be prevented from being influenced by backward flowing into the intercepting pipe.

Description

Technical Field

[0001] This utility model belongs to the technical field of flow interception devices, and in particular relates to a hydrodynamic flow interception device. Background Technology

[0002] With urbanization and people's increasing demand for environmental comfort, the water environment has become an integral part of urban leisure life and a key factor affecting the comfort of urban residents' lives. The main factor affecting the water environment is urban drainage, and the current urban drainage system is divided into combined sewer system, incomplete sewer system, and rainwater and sewage separation system.

[0003] Combined sewer systems intercept sewage during the dry season, aiming to effectively intercept initial rainwater and sewage during the rainy season. Incompletely separate sewer systems, primarily due to the mixing of rainwater and sewage during construction, result in incomplete separation on municipal roads. Like combined sewer systems, they aim to intercept sewage during the dry season and control initial rainwater and sewage to the greatest extent possible during the rainy season. Currently, there is limited control over initial rainwater runoff in rainwater pipes within separate rainwater and sewage systems. Pollution from these three drainage systems leads to severe water pollution in urban rivers, impacting the normal lives of surrounding residents.

[0004] Controlling sewage discharge into urban water bodies at its source is the most effective measure for treating black and odorous water bodies. To prevent sewage from entering rivers, sewage interception plays a crucial role as a control method and is a necessary facility for non-point source pollution control and sewage interception and collection. Currently, the most commonly used traditional interception wells mainly include overflow weirs, interception channels, and a combination of weirs and channels. For combined sewer systems and incompletely separate sewer systems, these three types of interception wells mainly utilize the water depth and flow rate within the well to intercept or overflow. During the rainy season, they cannot effectively distinguish between sewage in the early stages of combined sewer systems, initial rainwater, and rainwater with increased pollutant concentrations in the later stages. Secondly, the interception pipelines discharge mixed rainwater and sewage under pressure, resulting in a much larger volume of mixed rainwater and sewage discharged into the sewage treatment plant than the amount of sewage in the dry season. This leads to a greater risk of sewage overflow during rainy days with a higher number of interception wells. For separate rainwater and sewage systems, the initial rainwater discharge has a high pollutant concentration, and this initial rainwater directly enters the river, causing severe pollution.

[0005] The above three types of traditional interception wells currently mostly use weir gate equipment to control the flow, and all require the construction of new gate wells, which is difficult to construct. In the later stage, there are disadvantages such as the high requirements for professional knowledge in operation and maintenance, and the need to provide energy for a long time.

[0006] Patent document CN114033018A discloses a zero-leakage structure and operation method for intercepting pipelines used in environmental protection engineering. This structure includes a flow-limiting well, a sewage interception well, a combined sewer system, an intercepting pipe, and a gate assembly. However, this patent controls water flow via an electrically operated gate, which requires certain usage and maintenance costs.

[0007] Patent document CN118241735A discloses an interception system and interception control method for urban drainage. The interception system includes: an interception well, a confluence pipe, a discharge pipe, an interception pipe, a gate, a weir, and a control system. This system requires the gate and weir to determine the combination of opening and closing the gate and weir based on water quality conditions, making its structure relatively complex. Utility Model Content

[0008] To solve the above-mentioned technical problems, this utility model provides a hydrodynamic interception device.

[0009] This utility model is achieved through the following technical solution.

[0010] This utility model provides a hydrodynamic interception device, including a main body, an inlet pipe and an outlet pipe. The main body is provided with a leakage component, a grid bar and a force-bearing component. The inlet pipe is located above the main body and the outlet pipe is located below the main body.

[0011] Preferably, a slow-flow cavity is provided on one side of the main body, and a retention cavity is provided inside the main body. The slow-flow cavity and the retention cavity are connected. A chute is provided on the other side of the main body, and the grid bar is provided on the top of the chute. A retention pipe is provided inside the retention cavity.

[0012] Preferably, a lock hole area is provided at the top of the slide groove, the width of the lock hole area is greater than the width of the slide groove, the lock hole area is connected to the slide groove, and the axial cross section at the connection between the lock hole area and the slide groove is T-shaped.

[0013] Preferably, the leakage assembly includes a float, a guide plate, and a top plate. The float is disposed on the bottom surface of the guide plate. The guide plate is connected to the force-bearing component via a connecting rod A. The connecting rod A is slidably connected to the main body. The top plate is disposed above the guide plate, and the height of the top plate is less than the height of the grid bars.

[0014] Preferably, the floats are respectively disposed at the four corners of the bottom surface of the guide plate, and the guide plate is trapezoidal.

[0015] Preferably, the top plate has an arched shape on one side of the water outlet end, and several through holes are provided on the top plate.

[0016] Preferably, the force-bearing component includes a force-bearing plate, a connecting rod B, and a latch. One end of the force-bearing plate is hinged to the main body, one end of the connecting rod B is connected to the force-bearing plate, and the other end of the connecting rod B slides through the main body and is connected to the leakage component. The latch is disposed on the connecting rod B.

[0017] Preferably, the force-bearing plate is arc-shaped, and the height of the connection between the force-bearing plate and the main body is greater than the height of the connection between the force-bearing plate and the connecting rod B.

[0018] Preferably, several grid bars are arranged in parallel on the main body, and the width of the grid bars is greater than the length of the force-bearing component.

[0019] The beneficial effects of this utility model are as follows:

[0020] This invention utilizes hydrodynamics to control the sewage interception flow under different drainage systems, solving the problem of excessive interception flow leading to overflow during rainy days, without using gates or other control measures. The interception device is highly adaptable and can be used at community outlets, combined sewers, main stormwater pipes, and at the front, middle, or end of trunk lines, and is simple to install. The elevation of the interception device itself, combined with water level control, can prevent backflow into the interception pipe and its impact on sewage concentration.

[0021] This utility model can be simulated using a hydraulic model to determine the main installation location, such as the community confluence point, the main merging pipe, or the trunk line. After calculating and determining the dimensions, it can be directly constructed inside the inspection well. If the dimensions do not meet the requirements for direct construction inside the existing inspection well, a new inspection well can be constructed to reduce the amount of construction work. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention used in a rainwater and sewage separation system;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model for combined and partially separate systems;

[0024] Figure 3 This is a top view of the structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of region A of this utility model;

[0026] Figure 5 This is a schematic diagram of the keyhole area of ​​this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the grid bar of this utility model;

[0028] In the diagram: 101-Main body, 102-Slow flow chamber, 103-Interception chamber, 104-Slide groove, 1-Force plate, 2-Connecting rod B, 3-Grid bar, 4-Connecting rod A, 5-Lock hole area, 6-Lock, 7-Interception pipe, 8-Through hole, 9-Float ball, 10-Guide plate, 11-Inlet pipe, 12-Outlet pipe, 13-Top plate, 14-Water quality monitor, 15-Water level monitor. Detailed Implementation

[0029] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0030] Example:

[0031] like Figures 1 to 6As shown, a hydrodynamic interception device includes a main body 101, an inlet pipe 11, and an outlet pipe 12. The main body 101 is provided with a leakage component, a grid bar 3, and a force-bearing component. The inlet pipe 11 is located above the main body 101. Water flowing out of the main body 101 enters the outlet pipe 12 through the grid bar 3. The outlet pipe 12 is located below the main body 101. This arrangement can prevent water from flowing back into the main body 101 through the outlet pipe 12 and flowing out from the inlet pipe 11.

[0032] A flow-slowing chamber 102 is provided on one side of the main body 101, and a interception chamber 103 is provided inside the main body 101. The flow-slowing chamber 102 is connected to the interception chamber 103. A chute 104 is provided on the other side of the main body 101, and the grid bar 3 is provided at the top of the chute 104. An interception pipe 7 is provided inside the interception chamber 103, and the water intercepted by the interception chamber 103 flows out through the interception pipe 7. Corresponding slots are opened on both sides of the chute 104 to allow connecting rods A4 and B2 to extend into them. The slots are relatively narrow, allowing water in the interception chamber 103 to pass through the slots slightly out of the main body 101 and into the outlet pipe 12.

[0033] Water flowing from inlet pipe 11 first enters slow-flow chamber 102, which serves as slow-flow zone B1. This slow-flow zone controls the flow velocity of sewage and initial rainwater entering inlet pipe 11 and deposits some sediment. Interception chamber 103 and leakage components form leakage zone B2, which can intercept sewage under normal flow conditions and intercept a certain amount of sewage under larger flow conditions. Slide 104 and load-bearing components form hydraulic control zone B3, which can control the height of guide plate 10 through water flow. Several grates 3 form grid zone B4, used to prevent large pieces of waste from falling onto load-bearing plate 1.

[0034] The top of the slide 104 is provided with a lock hole area 5. The width of the lock hole area 5 is greater than the width of the slide 104. The lock hole area 5 is connected to the slide 104. The axial cross section at the connection between the lock hole area 5 and the slide 104 is T-shaped.

[0035] The leakage assembly includes a float 9, a guide plate 10, and a top plate 13. The float 9 is disposed on the bottom surface of the guide plate 10. The guide plate 10 is connected to the force-bearing component via a connecting rod A4. The connecting rod A4 is slidably connected to the main body 101. The top plate 13 is disposed above the guide plate 10. Water flowing out of the slow-flow chamber 102 must pass through the through hole 8 of the top plate 13 to enter the interception chamber 103. The height of the top plate 13 is less than the height of the grid 3. This configuration is such that the height of the water inlet side of the interception chamber 103 is lower than the height of the water outlet side.

[0036] The floats 9 are respectively located at the four corners of the bottom surface of the guide plate 10. The guide plate 10 is trapezoidal, and the water falling through the through holes 8 flows along both sides of the guide plate 10, playing a certain buffering role. The outlet side of the top plate 13 is arched, acting as a weir. Several through holes 8 are provided on the top plate 13. The through holes 8 can be circular or strip-shaped according to the interception flow rate, which can filter garbage and other debris. The floats 9 change height with the water level in the interception chamber 103. When the water level in the interception chamber 103 rises, the floats 9 drive the guide plate 10 to rise, which in turn drives the top plate 13 to rise, preventing the water flowing out of the slow flow chamber 102 from entering the interception chamber 103 without being filtered by the top plate 13.

[0037] The force-bearing component includes a force-bearing plate 1, a connecting rod B2, and a latch 6. One end of the force-bearing plate 1 is hinged to the main body 101, and one end of the connecting rod B2 is connected to the force-bearing plate 1. The other end of the connecting rod B2 passes through the slide groove 104 of the main body 101 and is slidably connected to the connecting rod A4 of the leakage component. The connecting rod B2 and the connecting rod A4 can be hinged. The latch 6 is disposed on the connecting rod B2. The latch 6 is manufactured using existing technology. In its natural state, it is Y-shaped. After the top of the latch 6 contacts an object and is subjected to force, the latch 6 can change into a T-shape, thereby locking in the lock hole area 5. When the top of the latch 6 no longer contacts the object, the latch 6 can automatically return to the Y-shape and then enter the slide groove 104.

[0038] The force-bearing plate 1 is arc-shaped, so that when water falls on it and exerts force, the force-bearing plate 1 can lift the connecting rod B2 upward, thereby raising the latch 6 and the connecting rod A4. The height of the connection between the force-bearing plate 1 and the main body 101 is greater than the height of the connection between the force-bearing plate 1 and the connecting rod B2. The water outlet pipe 12 is located below the force-bearing plate 1, and water enters the water outlet pipe 12 after falling on the force-bearing plate 1.

[0039] Several grid bars 3 are arranged parallel to each other on the main body 101. The width of the grid bars 3 is greater than the length of the force-bearing component. One end of the grid bars 3 is flush with the force-bearing plate 1 of the force-bearing component, and the other end of the grid bars 3 is longer than the width of the force-bearing plate 1 of the force-bearing component. Figure 4 As shown, D1 is the length of the grid bar 3, D2 is the length of the load-bearing plate 1, and b is the width of the gap between the grid bars 3; D1 > D2, ensuring that large-sized waste will not fall into the load-bearing plate 1, and only water flows through the gap between the grid bars 3, and the water flow impacts the load-bearing plate 1.

[0040] Figure 2In this design, H3 represents the outlet height of the outlet pipe 12, and H4 represents the vertical distance from H3 to the lowest point of the load-bearing plate 1. When H4 is greater than H3, H4 can be determined by the river water level at the outlet pipe 12 to prevent backflow. When H4 is equal to H3, a water level monitor 15 can be installed at H3. When the water level exceeds a certain range, the guide plate 10 and the top plate 13 are directly controlled to close, further preventing river backflow. With the water level monitor 15 installed, this invention can be used in combined sewer systems and partially separate sewer systems.

[0041] A control method for a hydrodynamic flow-blocking device includes the following steps:

[0042] 1. The required interception flow rate for domestic sewage, industrial wastewater, and initial rainwater that converge and flow into inlet pipe 11 is:

[0043] dry season:

[0044] Q 截流 =Q d +Q m

[0045] rainy season:

[0046] Q 截流 =Q d +Q m +Q 初期雨水

[0047] In the formula: domestic sewage is Q d m 3 / d

[0048] Wastewater from production is Q m m 3 / d

[0049] The initial rainfall is Q 初期雨水 m 3 / d

[0050] The sewage flow rate under pressure flow conditions in a sewage pipeline can be calculated based on the pipeline slope, pipe material, roughness coefficient, and pipe diameter at full flow rate, yielding the flow velocity and flow rate (Q) under these conditions. w ).

[0051] During the dry season, sewage enters the seepage zone B2 through the slow flow zone B1. Due to the low sewage flow during the dry season, the sewage flow rate slows down after passing through the slow flow zone B1. When passing through the seepage zone B2, the sewage enters the lower interception pipe 7, while large particles of garbage are trapped above the seepage zone B2.

[0052] During the rainy season, when the return period is short, initial rainwater continuously flows into the main pipe. The flow regime changes of upstream initial rainwater in the pipe can be simulated using SWMM, utilizing Q... 截流 and Q wThe difference between the two values ​​determines the height H1 on the inlet side of the main body 101 and the height H2 on the outlet side of the main body 101.

[0053] Q 初期雨水 Before t1, Q 截流 >Q w All intercepted sewage enters interception pipe 7 through leakage zone B2;

[0054] Q 初期雨水 After t1, as Q... 截流 The increase of Q leads to 截流 >Q w As the water level in the intercepting fittings continues to rise, when the water level reaches the float 9, the float 9 is driven by buoyancy to raise and unfold the guide plate 10, which in turn drives the latch 6 to rise. At the same time, under the action of buoyancy, the force rod 2 drives the force plate 1 to rotate around the hinge.

[0055] Q 初期雨水 When the time is greater than t1 and close to 15 minutes, the latch 6 enters the lock hole area 5; during the ascent, the guide plate 10 continuously reduces the filter area of ​​the top plate 13, making Q 截流 As the water level gradually decreases, when it exceeds H2, the water passes through the grid area B4, washing away or intercepting the garbage. The water falls and impacts the force plate 1, and the latch 6 is pressed in the lock hole area 5, locking itself in the lock hole area 5. The water flows directly through the main body 101 into the outflow pipe 12.

[0056] As the rainfall ends, the flow gradually decreases. When the inflow is less than the outflow of the interceptor pipe 7, the water does not flow out of the main body 101, the stress plate 1 is no longer under stress, and the latch 6 gradually returns to its original state under the gravity of the guide plate 10 and the water flow pressure. The sewage entering through the inlet pipe 11 continues to enter the interceptor pipe 7 and is discharged.

[0057] When there is heavy rainfall, the water flow increases rapidly, and the water can continue to flow out of the main body 101 and be discharged through the discharge pipe 12, so as to avoid affecting the drainage of rainwater and thus avoid urban flooding.

[0058] 2. Initial rainwater interception in the rainwater and sewage separation pipeline

[0059] The required flow rate for the rainwater and sewage separation pipeline is:

[0060] Q 截流 =Q 初期雨水

[0061] If the rainfall is relatively light, Q 初期雨水 The inflow rate increases over time, and the entire control process is consistent with the aforementioned combined flow control process. And Q... w Need to be based on Q 初期雨水During the water inflow process, the pipe slope, pipe material, roughness coefficient, and pipe diameter are determined in the full-flow pipe flow calculation; the flow control process is also consistent with the confluence flow control process during the rainy season when the flow volume is large. In order to prevent clean rainwater from entering the sewage pipe in the later stage of the rainwater pipe, a water quality monitor 14 is installed between the top plate 13 and the inlet pipe 11 in the rainwater and sewage separation pipe. When the water quality monitor 14 is installed, this utility model can be used in the rainwater and sewage separation system. When the water quality parameters meet the discharge requirements, the guide plate 10 and the top plate 13 control the clean rainwater from flowing into the slow flow chamber 102.

Claims

1. A hydrodynamic flow control device, characterized in that: It includes a main body (101), an inlet pipe (11) and an outlet pipe (12). The main body (101) is provided with a leakage component, a grid bar (3) and a force-bearing component. The inlet pipe (11) is located above the main body (101) and the outlet pipe (12) is located below the main body (101).

2. The hydrodynamic flow control device as described in claim 1, characterized in that: A slow-flow cavity (102) is provided on one side of the main body (101), and a interception cavity (103) is provided inside the main body (101). The slow-flow cavity (102) and the interception cavity (103) are connected. A chute (104) is provided on the other side of the main body (101). The grid bar (3) is provided on the top of the chute (104), and an interception tube (7) is provided inside the interception cavity (103).

3. The hydrodynamic flow control device as described in claim 2, characterized in that: A lock hole area (5) is provided at the top of the slide groove (104). The width of the lock hole area (5) is greater than the width of the slide groove (104). The lock hole area (5) is connected to the slide groove (104). The axial cross section at the connection between the lock hole area (5) and the slide groove (104) is T-shaped.

4. The hydrodynamic flow control device as described in claim 1, characterized in that: The leakage assembly includes a float (9), a guide plate (10), and a top plate (13). The float (9) is disposed on the bottom surface of the guide plate (10). The guide plate (10) is connected to the force-bearing component through a connecting rod A (4). The connecting rod A (4) is slidably connected to the main body (101). The top plate (13) is disposed above the guide plate (10). The height of the top plate (13) is less than the height of the grid bar (3).

5. The hydrodynamic flow control device as described in claim 4, characterized in that: The floats (9) are respectively set at the four corners of the bottom surface of the guide plate (10), and the guide plate (10) is trapezoidal.

6. The hydrodynamic flow control device as described in claim 4, characterized in that: The top plate (13) has an arched shape on one side of the water outlet end, and several through holes (8) are provided on the top plate (13).

7. The hydrodynamic flow control device as described in claim 1, characterized in that: The force-bearing component includes a force-bearing plate (1), a connecting rod B (2), and a latch (6). One end of the force-bearing plate (1) is hinged to the main body (101), one end of the connecting rod B (2) is connected to the force-bearing plate (1), and the other end of the connecting rod B (2) slides through the main body (101) and is connected to the leakage component. The latch (6) is set on the connecting rod B (2).

8. The hydrodynamic flow control device as described in claim 7, characterized in that: The force plate (1) is arc-shaped, and the height of the connection between the force plate (1) and the main body (101) is greater than the height of the connection between the force plate (1) and the connecting rod B (2).

9. A hydrodynamic flow-blocking device as described in claim 1, characterized in that: The grid bars (3) are arranged in parallel on the main body (101), and the width of the grid bars (3) is greater than the length of the force-bearing component.

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