Multistage baffle drainage drop well system and method

Abstract

The multi-stage baffle drainage drop well system comprises a protection wall and a drop well, a branch pipe water inlet is located in the drop well, the bottom of the drop well is connected with an upstream main pipe and a downstream main pipe, and a first-stage baffle, a second-stage baffle and a third-stage baffle are sequentially arranged below the branch pipe water inlet from high to low. The first-stage baffle plate, the second-stage baffle plate and the third-stage baffle plate are inclined upwards at an included angle of 39-42 degrees with the horizontal plane; a first notch is formed in the end, away from the branch pipe water inlet, of the first-stage baffle, a third notch is formed in the position, under the branch pipe water inlet, of the third-stage baffle, a second notch is formed in the second-stage baffle, and the second notch does not coincide with the first notch and the third notch in the vertical projection direction. Direct flushing of flowing water to the drop well can be effectively relieved through the multiple stages of baffles, water flow flowing out of the water inlets of the branch pipes is prevented from directly flushing the drop well, objects directly flushed by the water flow are converted into the baffles, the drainage effect is achieved between the drop well and the baffles, and the service life of the drop well is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal drainage, and relates to a multi-stage baffle drainage drop well system and method. Background Art

[0002] Urban drainage drop wells are a vital component of the municipal drainage network system. Their core function is to achieve a smooth transition of water flow by connecting pipes at different heights, avoiding direct scouring of the drainage pipe by water with high kinetic energy, thereby extending the service life of the drainage pipe.

[0003] In actual operation and long-term operation, the design and function of existing drop wells have certain limitations, such as: Noise pollution: When water falls from high to low, the sound wave effect generated will cause noise disturbance to the living environment of surrounding residents, especially in the quiet environment at night. Although this phenomenon is a natural result of the working principle of the water well, full consideration of noise control measures during the design stage and assessment of its potential impact on the community when selecting a site are effective ways to mitigate its negative impact.

[0004] Structural complexity and cost: The structural design of the drop well, including but not limited to the drop wall, energy dissipation pool and other components, is complex and places high demands on construction and maintenance. The precise design and construction of these structures are designed to ensure a smooth transition of water flow while minimizing the impact of water flow on the well wall structure. However, this complexity also means higher construction costs and maintenance difficulties, posing challenges to the financial sustainability of urban infrastructure.

[0005] Siltation and maintenance challenges: The structural characteristics of the waterfall well make it a natural "collection point" for solid waste and sediment. Over time, the accumulation of these sediments at the bottom of the well not only hinders the smooth flow of water, but also reduces the drainage efficiency of the waterfall well. Therefore, regular cleaning and maintenance work has become the key to ensuring the functionality of the waterfall well to ensure its long-term stable operation. These problems not only pose a challenge to the operating efficiency of the waterfall well, but may also have a potential impact on the surrounding environment and the quality of life of residents. Summary of the invention

[0006] The purpose of the present invention is to provide a multi-stage baffle drainage drop well system and method to address the defects of the prior art. The system and method can reduce the kinetic energy of branch pipe water when entering the main pipe, and can well reduce the problem of noise pollution; through the layered baffles, it can be suitable for dry seasons and flood seasons.

[0007] In a first aspect of the present invention, a multi-stage baffle drainage drop well system is provided, comprising a protective wall and a drop well closely attached to the inner side of the protective wall, a cover plate is arranged on the upper part of the drop well, and a manhole is arranged on the cover plate; a branch pipe water inlet is located in the drop well, the bottom of the drop well is connected to the upstream main pipe and the downstream main pipe, and a primary baffle, a secondary baffle and a tertiary baffle are arranged in sequence from high to low below the branch pipe water inlet, and the primary baffle, the secondary baffle and the tertiary baffle are all inclined upward at an angle of 39°-42° with the horizontal plane; wherein, A first notch is constructed at one end of the first baffle away from the branch pipe water inlet, a third notch is provided on the third baffle just below the branch pipe water inlet, and a second notch is constructed on the second baffle, and the second notch does not overlap with the first notch and the third notch in the vertical projection direction.

[0008] Preferably, the primary baffle, the secondary baffle and the tertiary baffle are each composed of five plates of the same size and shape.

[0009] Preferably, the extended ends of the first-stage baffle, the second-stage baffle and the third-stage baffle are all enclosed to form a top opening, wherein the top opening diameter of the first-stage baffle is three-quarters of the inner diameter of the drop well, the top opening diameter of the second-stage baffle is one-half of the inner diameter of the drop well, and the top opening diameter of the third-stage baffle is one-fifth of the inner diameter of the drop well.

[0010] Preferably, the primary baffle, the secondary baffle and the tertiary baffle are provided with silt baffles at the edges of the notches, the silt baffles are arranged along the extension direction of the baffles, and the length thereof is not greater than one half of the length of the corresponding baffle.

[0011] Preferably, the angles between the primary baffle, the secondary baffle and the tertiary baffle and the horizontal plane are all the same.

[0012] Preferably, the angles between the primary baffle, the secondary baffle and the tertiary baffle and the horizontal plane are all 41°.

[0013] Preferably, the spacing between the primary baffle and the secondary baffle, and between the secondary baffle and the tertiary baffle are both one fifth of the depth of the drop well.

[0014] The second aspect of the present invention provides a multi-stage drainage waterfall method, constructing a multi-stage baffle drainage waterfall system as described in any of the above items, diverting incoming water to the top of the multi-stage baffle drainage waterfall system, so that the water flow is blocked at least three times during the process of falling vertically downward, and after each blockage, a lateral flow is formed before the next vertical fall.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a multi-stage baffle drainage drop well system and method. The multi-stage baffles can prevent the water flowing out from the branch pipe water inlet from directly scouring the drop well, and convert the object directly scoured by the water flow into the baffle, so that the drop well and the baffle play a drainage role, thereby extending the service life of the drop well.

[0016] 2. The present invention uses multi-stage baffles, and the spacing between each stage of baffles is only less than one-third of the distance from the branch pipe water inlet to the bottom of the well, which can effectively reduce the kinetic energy of the water flowing at the branch pipe water inlet step by step, and can effectively reduce the noise generated by the large kinetic energy of the water directly impacting the bottom of the well.

[0017] 3. The present invention alleviates the direct scouring of the water drop well by the flowing water by using multi-stage baffles. When designing, only the strength and installation method of the baffles and the number of baffles to be used need to be considered, and the structural complexity and cost are relatively low; 4. The present invention can effectively alleviate the direct scouring of the waterfall by flowing water by using a multi-stage baffle. In the multi-stage baffle drainage system, a silt collection plate is provided at the edge of the baffle close to each stage where the baffle is not provided. Whenever flowing water carrying more sediment falls into the multi-stage baffle system from the branch pipe water inlet, the sediment will be more likely to remain in the baffle system. Since a silt collection plate is provided at the edge of the baffle close to each stage where the baffle is not provided, and the sediment has a greater density than the flowing water, the sediment is more likely to settle in the silt collection plate at the place where the water flow rate slows down, thereby achieving the purpose of separating the sediment from the flowing water. Subsequently, it is only necessary to regularly clean the sediment in the silt collection plate in the baffle system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 AA section view.

[0020] Figure 3 for Figure 1 Middle BB section view.

[0021] Figure 4 for Figure 1 CC section view.

[0022] In the figure: 1. retaining wall; 2. waterfall; 3. cover plate; 4. manhole; 5. branch pipe inlet; 6. upstream main pipe; 7. downstream main pipe; 8. primary baffle; 9. secondary baffle; 10. tertiary baffle; 11. first gap; 12. second gap; 13. third gap; 14. silt baffle. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary descriptions and cannot be understood as limitations on this patent; in order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the positional relationship described in the drawings is only used for exemplary descriptions and cannot be understood as limitations on this patent.

[0024] As an embodiment of the present invention, see the attached Figure 1-Figure 4 The present embodiment provides a multi-stage baffle drainage drop well system, including a protective wall 1 and a drop well 2 closely attached to the inner side of the protective wall 1, a cover plate 3 is arranged on the upper part of the drop well 2, and a manhole 4 is arranged on the cover plate 3; a branch pipe water inlet 5 is located in the drop well 2, and the bottom of the drop well 2 is connected to an upstream main pipe 6 and a downstream main pipe 7, and a primary baffle 8, a secondary baffle 9 and a tertiary baffle 10 are arranged below the branch pipe water inlet 2 from high to low, and the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 are all inclined upward at an angle of 39°-42° with the horizontal plane; wherein, A first notch 11 is constructed at one end of the first baffle plate 8 away from the branch pipe water inlet 2, a third notch 13 is provided on the third baffle plate 10 directly below the branch pipe water inlet 2, and a second notch 12 is constructed on the second baffle plate 9, and the second notch 12 does not overlap with the first notch 11 and the third notch 13 in the vertical projection direction.

[0025] In some preferred embodiments, Figure 2-Figure 4 As shown, the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 are all composed of five plates of the same size and shape.

[0026] The above-mentioned embodiment can effectively alleviate the direct scouring of the water drop well by using a multi-stage baffle. In the multi-stage baffle drainage system, a silt collection plate is provided at the edge of the baffle close to each baffle where no baffle is provided, as shown in the cross-sectional view. Whenever flowing water carrying a large amount of sediment falls into the multi-stage baffle system from the branch pipe water inlet, the sediment will be more likely to remain in the baffle system. Since a silt collection plate is provided at the edge of the baffle close to each baffle where no baffle is provided, and the sediment has a greater density than the flowing water, the sediment is more likely to settle in the silt collection plate at the place where the water flow rate slows down, thereby achieving the purpose of separating the sediment from the flowing water. Subsequently, it is only necessary to regularly clean the sediment in the silt collection plate in the baffle system.

[0027] In some preferred embodiments, the extended ends of the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 are all enclosed to form a top opening, wherein the top opening diameter of the primary baffle 8 is three quarters of the inner diameter of the drop well 2, the top opening diameter of the secondary baffle 9 is one half of the inner diameter of the drop well 2, and the top opening diameter of the tertiary baffle 10 is one fifth of the inner diameter of the drop well 2.

[0028] In some embodiments, the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 are provided with a silt baffle 14 at the edge of the notch, and the silt baffle is arranged along the extension direction of the baffle, and its length is not greater than half of the length of the corresponding baffle. After the silt baffle 14 is arranged, when the water flows on the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 toward the notch, it is blocked by the silt baffle 14, which can promote the sedimentation and reduce the impact of sediment into the drop well. The height of the silt baffle 14 can be appropriately adjusted according to the amount of sediment in the water flow under the engineering environment, and it can enter from the manhole to clean up the sediment during the dry period.

[0029] Specifically, the angles between the primary baffle 8, the secondary baffle 9 and the tertiary baffle 10 and the horizontal plane are all the same.

[0030] As another preferred embodiment of the present invention, the angles between the first baffle 8, the second baffle 9 and the third baffle 10 and the horizontal plane are all 41°. Through statistics of multiple engineering applications, it is found that when the inclination angle is 41°, under the same water flow impact, the noise value is the smallest when detected at 30 meters of the drop well, so it is believed that this inclination angle helps to reduce the water flow impact noise during the operation of the drop well.

[0031] In another preferred embodiment, the distances between the primary baffle 8 and the secondary baffle 9 , and between the secondary baffle 9 and the tertiary baffle 10 are all one fifth of the depth of the drop well 2 .

[0032] In the above embodiment, the use of multi-stage baffles can prevent the water flow from the branch pipe water inlet from directly scouring the drop well, and convert the object directly scouring by the water flow into the baffle, so that the drop well and the baffle play a drainage role, thereby extending the service life of the drop well; at the same time, multi-stage baffles are used, and the spacing between each stage of baffles is only less than one-third of the distance from the branch pipe water inlet to the bottom of the well, which can effectively reduce the kinetic energy of the water flowing from the branch pipe water inlet step by step, and can effectively reduce the noise generated by the large kinetic energy of the water directly impacting the bottom of the well.

[0033] It can be understood that the present invention also provides a multi-stage drainage waterfall method, the core of which is to construct a multi-stage baffle drainage waterfall system as described in any of the above items, to divert incoming water to the top of the multi-stage baffle drainage waterfall system, so that the water flow is blocked at least three times in the process of falling vertically downward, and after each blockage, a horizontal flow is formed before the next vertical fall. The following is a detailed analysis combined with the falling process of the water flow.

[0034] Based on the above embodiment, during the service of the present invention, when the water flow rate flowing out of the branch pipe water inlet is small, the water flows out of the branch pipe water inlet 5 and flows down almost along the inner wall of the drop well 2, and the water will fall on the primary baffle 8 below. Figure 2 As shown; since the first baffle 8 is provided with a first notch 11 at the end away from the branch pipe water inlet 5, that is, no baffle is provided, when the water flows into the first baffle 8, the water flows along the direction in which the first baffle 8 is connected to the inner wall of the drop well 2, and finally flows downward from the first notch 11.

[0035] The water flowing downward from the first notch 11 falls onto the secondary baffle 9, which is provided with a second notch 12. Figure 3 As shown, the water flowing down from the primary baffle 8 will directly fall onto the secondary baffle 9, most of the water will directly flow to the second notch 12 reserved for the secondary baffle 9 and continue to flow downward, and a small amount of water will flow in another direction along the secondary baffle 9 connected to the inner wall of the drop well 2, and finally continue to flow downward from the second notch 12 reserved for the secondary baffle 9.

[0036] The water flowing downward from the second notch 12 reserved in the secondary baffle 9 falls on the tertiary baffle 10. The tertiary baffle 10 located below the branch pipe water inlet 5 is provided with a third notch 13. Figure 4 As shown, the water flowing down from the secondary baffle 9 will directly fall onto the tertiary baffle 10, and most of the water will directly flow to the third notch 13 reserved by the tertiary baffle and continue to flow downward, and a small part of the water will flow in another direction along the tertiary baffle 10 connected to the inner wall of the drop well 2, and finally flow to the third notch 13 reserved by the tertiary baffle 10 and flow downward until it flows into the bottom of the well and merges into the upstream main pipe 6 and flows to the downstream main pipe 7 together.

[0037] When the water flow rate out of the branch pipe water inlet is moderate, except for the drought and flood seasons, the water flow rate of the branch pipe water inlet most of the time, due to the large flow velocity, most of the water will fall directly on the secondary baffle 9 after flowing out of the branch pipe water inlet 5, and a small part of the water will fall on the primary baffle 8, flow along the direction where the primary baffle 8 is connected with the inner wall of the drop well 2, and finally flow downward from the first notch 11 of the primary baffle 8 and fall on the secondary baffle 9; most of the water falling on the secondary baffle 9 will flow directly to the second notch 12 reserved for the secondary baffle 9 and continue to flow downward, and a small part of the water will fall on the secondary baffle 9. The divided water flow will flow in the other direction where the secondary baffle plate 9 is connected to the inner wall of the drop well 2, and finally flow to the second notch 12 reserved in the secondary baffle plate 9 and continue to flow downward; the water flow flowing down from the secondary baffle plate will directly fall on the tertiary baffle plate 10, and most of the water flow will directly flow to the third notch 13 reserved in the tertiary baffle plate and continue to flow downward, and a small part of the water flow will flow in the other direction where the tertiary baffle plate 10 is connected to the inner wall of the drop well 2, and finally flow to the third notch 13 reserved in the tertiary baffle plate 10 and flow downward, until it flows into the bottom of the well and merges into the upstream main pipe 6 and flows to the downstream main pipe 7 together.

[0038] When the flow rate outflowing from the branch pipe water inlet is large, that is, during the flood season, most of the water will flow out from the branch pipe water inlet 5 and will directly fall on the third-level baffle 10; part of the water will directly fall on the second-level baffle 9; a small part of the water will fall on the first-level baffle 8, flow along the direction in which the first-level baffle 8 is connected to the inner wall of the drop well 2, and finally flow downward from the first notch 11 on the first-level baffle 8 and fall on the second-level baffle 9; most of the water that falls on the second-level baffle 9 will directly flow to the second notch 12 reserved for the second-level baffle 9 and continue to flow downward, and a small part of the water will flow along The secondary baffle 9 flows in the other direction connected to the inner wall of the drop well 2, and finally flows to the second notch 12 reserved in the secondary baffle 9, continues to flow downward, and falls on the tertiary baffle 10; among the water flows falling on the tertiary baffle 10, most of the water flows will directly flow to the third notch 13 reserved in the tertiary baffle 10 and continue to flow downward, and a small part of the water flows along the other direction connected to the tertiary baffle 10 and the inner wall of the drop well 2, and finally flows to the third notch 13 reserved in the tertiary baffle 10 and flows downward until it flows into the bottom of the well and merges into the upstream main pipe 6 and flows to the downstream main pipe 7 together.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A multi-stage baffle drainage drop well system, characterized by: The invention comprises a protective wall (1) and a water drop well (2) closely attached to the inner side of the protective wall (1); a cover plate (3) is arranged on the upper part of the water drop well (2); a manhole (4) is arranged on the cover plate (3); a branch pipe water inlet (5) is located in the water drop well (2); the bottom of the water drop well (2) is connected to an upstream main pipe (6) and a downstream main pipe (7); a primary baffle (8), a secondary baffle (9) and a tertiary baffle (10) are arranged in descending order below the branch pipe water inlet (2); the primary baffle (8), the secondary baffle (9) and the tertiary baffle (10) are all inclined upwards at an angle of 39° to 42° with the horizontal plane; wherein: A first notch (11) is formed at one end of the first baffle plate (8) away from the branch pipe water inlet (2), a third notch (13) is provided on the third baffle plate (10) directly below the branch pipe water inlet (2), and a second notch (12) is formed on the second baffle plate (9), wherein the second notch (12) does not overlap with the first notch (11) and the third notch (13) in the vertical projection direction.

2. A multi-stage baffle drainage drop well system according to claim 1, characterized in that: The primary baffle (8), the secondary baffle (9) and the tertiary baffle (10) are all composed of five plates of the same size and shape.

3. A multi-stage baffle drainage drop well system according to claim 1, characterized in that: The extended ends of the primary baffle plate (8), the secondary baffle plate (9) and the tertiary baffle plate (10) are all enclosed to form a top opening, wherein the diameter of the top opening of the primary baffle plate (8) is three quarters of the inner diameter of the drop well (2), the diameter of the top opening of the secondary baffle plate (9) is one half of the inner diameter of the drop well (2), and the diameter of the top opening of the tertiary baffle plate (10) is one fifth of the inner diameter of the drop well (2).

4. The multi-stage baffle drainage drop well system according to claim 1, characterized in that: The primary baffle (8), the secondary baffle (9) and the tertiary baffle (10) are provided with silt baffles (14) at the edges of the notches. The silt baffles are arranged along the extension direction of the baffles and have a length not greater than half the length of the corresponding baffle.

5. The multi-stage baffle drainage drop well system according to claim 1, characterized in that: The angles between the primary baffle (8), the secondary baffle (9) and the tertiary baffle (10) and the horizontal plane are all the same.

6. A multi-stage baffle drainage drop well system according to claim 5, characterized in that: The angles between the primary baffle (8), the secondary baffle (9) and the tertiary baffle (10) and the horizontal plane are all 41 degrees.

7. The multi-stage baffle drainage drop well system according to claim 1, characterized in that: The distances between the primary baffle (8) and the secondary baffle (9), and between the secondary baffle (9) and the tertiary baffle (10) are both one fifth of the depth of the drop well (2).

8. A multi-stage drainage waterfall method, characterized in that: Construct a multi-stage baffle drainage drop well system as described in any one of claims 1 to 7, and divert incoming water to the top of the multi-stage baffle drainage drop well system, so that the water flow is blocked at least three times during the process of falling vertically downward, and after each blockage, a lateral flow is formed before the next vertical fall.

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