Intelligent sectional overflow drainage device for bridge rainwater system

Abstract

The utility model provides a kind of bridge rainwater system intelligent sectional overflow drainage device, it is related to municipal drainage field, the utility model includes suspension pipe, suspension pipe is installed in the box girder below bridge, suspension pipe is made of several intercommunicating pipe sections, each pipe section is connected with bridge deck gullyway connection pipe of rainwater inlet connection and is provided with rainwater inlet; Overflow component is respectively arranged on each pipe section, for when rainwater flow in suspension pipe exceeds design recurrence interval standard, discharge excess rainwater, to realize sectional overflow;Water outlet of suspension pipe is connected to accident pool or rainwater storage tank by rainwater standpipe and ground rainwater system respectively, controller is used to control the opening and closing state of first electric switch valve.Compared with prior art, bridge rainwater system intelligent sectional overflow drainage device forms automatic overflow control system, realizes efficient drainage under normal working condition, realizes effective shunting and control to accident water under special working condition such as sudden accident.

Description

Technical Field

[0001] This utility model relates to the field of municipal drainage technology, and in particular to an intelligent segmented overflow drainage device for bridge rainwater systems. Background Technology

[0002] Bridges spanning sensitive waterways, such as those over the Yangtze and Jialing Rivers, must fully consider environmental protection and emergency response capabilities during their design and construction. Especially in the event of a vehicle accident, it is crucial to effectively prevent the direct discharge of accident water containing oil, chemicals, or other contaminants into the river, thereby avoiding water pollution. Therefore, emergency water collection and treatment ponds are typically constructed for the centralized collection and treatment of such water.

[0003] However, laying dedicated pipes to guide rainwater to the emergency pool would significantly increase construction costs, making it uneconomical. Modifying existing bridge deck drainage pipes presents structural limitations. In particular, traditional drainage systems are often segmented and directly discharge into the river; connecting them in series to the emergency pool would cause a surge in flow in the suspended pipes during heavy rainfall, easily leading to excessive water accumulation, poor drainage, and backflow or overflow. Rainwater stagnating on the bridge deck not only affects normal traffic but could also hinder timely rescue and relief efforts. Utility Model Content

[0004] To ensure the efficient drainage capacity of bridges under normal operating conditions and to effectively divert and control accident water in special conditions such as sudden accidents, this application provides an intelligent segmented overflow drainage device for bridge rainwater systems.

[0005] A smart segmented overflow drainage device for bridge rainwater systems includes: The suspension pipe is installed under the box girder of the bridge. The suspension pipe is composed of several interconnected pipe sections, and each pipe section is connected to a rainwater inlet connection pipe that is connected to the rainwater inlet of the bridge deck. Overflow components are respectively installed on each of the pipe sections to discharge excess rainwater when the rainwater flow in the suspended pipe exceeds a preset threshold, so as to achieve segmented overflow; Branch pipes, the outlet of the suspended pipe is connected to the emergency pool and the rainwater storage pool respectively through the branch pipes, and each of the branch pipes is equipped with a first electric switch valve; The controller is used to control the opening and closing state of the first electrically operated switch valve. Under normal operating conditions, the first electric switch valve connected to the emergency pool is closed, and the first electric switch valve connected to the rainwater storage tank is opened. In the event of an accident, the first electrically operated valve connected to the accident pool is opened, and the first electrically operated valve connected to the rainwater storage tank is closed.

[0006] Preferably, the overflow assembly includes an overflow pipe, which sequentially comprises a vertical section, a horizontal section, and a bent section; wherein, One end of the vertical section is connected to the corresponding pipe section, and the other end is connected to the horizontal section. The bent section is the outlet end of the overflow pipe and is connected to the horizontal section.

[0007] Preferably, the overflow pipe is equipped with a second electrically operated switch valve, which is electrically connected to the controller; wherein, A level gauge is installed on the pipe section corresponding to the overflow pipe, and the level gauge is also electrically connected to the controller; Under normal operating conditions, the controller is used to receive the water level signal detected by the level gauge, and when the water level reaches a preset threshold, it controls the second electric switch valve to open to start overflow drainage.

[0008] Preferably, the pipe section is also provided with an inspection port, which is sealed with a sealing plate via a flange.

[0009] Preferably, an insect-proof net is fixedly installed at the outlet end of the overflow pipe.

[0010] Preferably, a corrugated compensating pipe is connected between two adjacent pipe sections via a flange.

[0011] Preferably, the corrugated compensation pipe is lined with a polytetrafluoroethylene rubber layer; And / or, the corrugated compensating pipe is a steel corrugated pipe.

[0012] Preferably, there are two sets of the emergency pool and the rainwater storage pool, which are respectively located at the abutments at both ends of the bridge; the suspension pipe is also divided into two sets, which extend symmetrically from the middle of the bridge and are respectively connected to the emergency pool and the rainwater storage pool located at both ends. And / or, the height of the horizontal sections of the plurality of overflow pipes gradually decreases from the ends of the bridge toward the middle.

[0013] Preferably, the insect-proof net is made of an elastic material and has a deformable structure. When the net encounters water pressure exceeding a set threshold, the mesh can temporarily expand to reduce drainage resistance. When the water pressure drops to the normal range, the mesh automatically returns to its original shape.

[0014] Preferably, the suspension pipe is fixedly installed by combining multiple sets of pipe clamps with the suspension frame. Each set of pipe clamps is sleeved on the outside of the suspension pipe. One end of the suspension frame is fixedly connected to the pipe clamp, and the other end is located below the box girder of the bridge.

[0015] This utility model has the following advantages and beneficial effects: (1) This utility model achieves intelligent switching and diversion control of bridge drainage under different working conditions through the coordinated cooperation of the suspension pipe, rainwater inlet connecting pipe, branch pipe, overflow component, electric switch valve and controller, and has significant functional advantages. Among them: Under normal operating conditions, the controller keeps the first electric switch valve connected to the emergency pool closed and the first electric switch valve connected to the rainwater storage tank open. Rainwater from the bridge deck flows into the suspension pipe through the rainwater inlet connection pipe and can be quickly and stably discharged into the rainwater storage tank, ensuring the smooth operation of the bridge drainage system and enabling centralized collection and reuse of rainwater, which meets the environmental protection requirements of energy conservation, emission reduction and resource recycling.

[0016] In the event of an emergency, such as a vehicle leaking water or a contaminated liquid spilling from the bridge, the controller can intelligently switch the drainage path, closing the first electric valve leading to the rainwater storage tank and opening the first electric valve leading to the emergency pool. This ensures that the water from the accident is centrally guided to the emergency pool for collection and treatment, thereby effectively preventing contaminated rainwater from being directly discharged into rivers and other sensitive water bodies and meeting the requirements for ecological and environmental safety control.

[0017] At the same time, the device is also equipped with overflow components corresponding to each pipe section. When the flow rate in the suspended pipe suddenly increases and exceeds the design threshold, the overflow components will automatically open to discharge excess rainwater, preventing excessive water volume in local areas from causing pipe siltation or backflow, and improving overall drainage efficiency and safety.

[0018] Through the combination of the above functions, this device not only ensures the reliability of drainage for bridges in both daily and accidental situations, but also improves the system's flood resistance and operational stability through segmented overflow design, and makes reasonable and effective use of the original drainage pipes, saving construction costs.

[0019] (2) This utility model constructs an automatic flow control overflow device, which includes a level gauge, electric valve, controller, overflow port and main pipe corrugated compensator, etc., and is linked with the electric valves of the accident pool and rainwater storage pool, thereby realizing precise control of the flow of bridge drainage under the conditions of initial rain, heavy rain, accident and rainstorm, and solving the pain points and difficulties in the existing bridge drainage. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a schematic diagram of the overall structure of an intelligent segmented overflow drainage device for bridge rainwater systems.

[0022] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0023] Figure 3 It is a structural diagram intended to show the suspension pipe, overflow assembly, suspension bracket, and pipe clamp.

[0024] Figure 4 yes Figure 3 Enlarged view of section B.

[0025] Figure 5 It is an exploded view intended to show the sealing board and insect netting.

[0026] The diagram is marked as follows: 1. Suspension pipe; 11. Pipe section; 111. Rainwater inlet connection pipe; 112. Inspection port; 1121. Sealing plate; 2. Overflow assembly; 21. Overflow pipe; 211. Vertical section; 212. Horizontal section; 213. Bend section; 22. Second electric switch valve; 23. Level gauge; 3. Branch pipe; 30. First electric switch valve; 31. Emergency pool; 32. Rainwater storage pool; 4. Controller; 5. Insect net; 6. Corrugated compensation pipe; 7. Pipe clamp; 71. Suspension frame; 8. Box girder; 81. Bridge deck rainwater inlet; 82. Bridge pier; 83. Guardrail; 9. Abutment. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] In the various embodiments of this application, "near end" and "far end" refer to the distance of each component from the user in the usage environment. The end closer to the user is designated as the "near end", and the end farther from the user is designated as the "far end".

[0030] The following is combined with Figures 1 to 5 The present application provides a detailed description of an intelligent segmented overflow drainage device for a bridge rainwater system through specific embodiments and application scenarios.

[0031] A smart segmented overflow drainage device for a bridge stormwater system includes a suspended pipe 1, which is installed below the box girder 8 of the bridge. Preferably, the suspended pipe 1 is securely connected to the bottom of the box girder 8 via a bracket to ensure its stability and durability during long-term bridge operation. The box girder 8 is supported by piers 82, which transfer the overall load of the bridge structure to the foundation structure, thereby maintaining the overall structural safety of the bridge. A guardrail 83 is installed on the top of the bridge, which not only protects vehicles or pedestrians from falls but also serves as a passageway for the installation of bridge ancillary components. Abutments 9 are constructed at both ends along the length of the bridge. The tops of the abutments 9 are flush with the bridge deck to achieve seamless connection between the bridge and adjacent road surfaces, thus ensuring the continuity and smoothness of vehicle traffic.

[0032] The suspension pipe 1 is composed of several interconnected pipe sections 11. Each pipe section 11 is connected to the other by a sealing joint flange to ensure the sealing effect during drainage. Each pipe section 11 is connected to a rainwater inlet connection pipe 111. The rainwater inlet connection pipe 111 is connected to the bridge surface rainwater inlet 81 pre-installed on the bridge surface through an interface. This is used to promptly divert rainwater collected on the bridge surface to the suspension pipe 1 to avoid water accumulation on the bridge surface and ensure vehicle traffic safety.

[0033] Reference Figure 3 As shown, overflow components 2 are installed on each pipe section 11. Preferably, the overflow components 2 can be installed in the middle of each pipe section 11 to quickly sense changes in the water level in the suspended pipe 1. This allows for timely discharge of excess rainwater when the rainwater flow in the suspended pipe 1 exceeds a preset threshold, preventing backflow of rainwater or pipe bursts due to poor drainage. This achieves the functions of segmented overflow, diversion, and pressure reduction. To achieve intelligent control, in different embodiments, the overflow components 2 can be equipped with an electromagnetic control structure. Specifically, they can be composed of automatically controlled solenoid valves. The solenoid valves are three-way valves with one outlet and two connecting ports. Through signal control, they can automatically adjust the drainage direction, enabling rapid diversion and discharge in special conditions such as heavy rain, thus improving the response speed and efficiency of the entire drainage system.

[0034] The outlet of the suspended pipe 1 is connected to the emergency pool 31 and the rainwater storage tank 32 via branch pipes 3. The branch pipes 3 are preferably located below the abutments 9 at both ends of the bridge and are connected to the emergency pool 31 and the rainwater storage tank 32 via a pipe network to collect and store discharged rainwater. Of course, in different implementations, the pipe connecting to the rainwater storage tank 32 can also be directly connected to a river or lake. Each branch pipe 3 is equipped with a first electric switching valve 30, used to control and switch the flow direction of the pipe under the command of a control signal. The first electric switching valve 30 is preferably an electric ball valve or an electric butterfly valve, which has a fast response speed, good sealing performance, and facilitates the switching of operating modes between different working conditions to adapt to the needs of sudden rainwater flow regulation.

[0035] Controller 4 is used to control the opening and closing status of the first electric switch valve 30. In specific implementations, controller 4 can be connected to each electric valve via wires or wireless communication to achieve remote real-time control. During actual installation, controller 4 can be fixedly installed on a bridge-specific control platform and simultaneously integrated with the monitoring system in the bridge management room. This allows management personnel to view the system's operating status in real time, remotely issue control commands, and manually intervene in case of emergencies, thereby effectively improving the system's operational stability and emergency response capabilities.

[0036] In normal operation, controller 4 keeps the first electrically operated valve 30 connected to the emergency pool 31 closed to prevent clean rainwater from entering the emergency pool 31 and affecting subsequent treatment processes in non-accident situations. Simultaneously, it opens the first electrically operated valve 30 connected to the rainwater storage tank 32, allowing rainwater to enter and be stored for subsequent bridge maintenance, greening irrigation, etc., achieving resource recycling. In accident situations, such as chemical leaks on the bridge deck or traffic accidents causing pollutant spread, controller 4 automatically switches the drainage direction upon receiving an accident signal. It opens the first electrically operated valve 30 connected to the emergency pool 31 and closes the first electrically operated valve 30 connected to the rainwater storage tank 32, diverting the contaminated rainwater to the emergency pool 31 for isolation and subsequent treatment. This effectively prevents pollutants from entering the rainwater storage tank 32 or even being discharged into natural water bodies, causing environmental damage and achieving effective response and handling of abnormal situations.

[0037] Preferably, the overflow component 2 includes an overflow pipe 21, which is used to effectively drain excess rainwater when the rainwater flow in the suspended pipe 1 is large, preventing the drainage function from failing due to water level rise in the suspended pipe 1. The overflow pipe 21 includes a vertical section 211, a horizontal section 212, and a bend section 213 in sequence. This structure makes the drainage path more reasonable and helps to achieve rapid and efficient gravity diversion. Specifically, one end of the vertical section 211 is connected to the corresponding section 11 of the suspended pipe 1, and is used to directly receive rainwater with high water pressure in the suspended pipe 1; the other end of the vertical section 211 is connected to the horizontal section 212, which is used to guide the water flow to extend and be transported in the horizontal direction; the bend section 213 is set as the outlet end of the overflow pipe 21 and is arranged in connection with the horizontal section 212 to form a downward diversion path.

[0038] In terms of specific installation structure, the vertical section 211 is preferably installed vertically, positioned above or to the side of the suspension pipe 1 section to ensure direct water flow. The horizontal section 212 is installed horizontally, connecting to the vertical section 211 in an L-shape, which helps control the water flow speed and direction, preventing excessive water flow impact. The bent section 213 is designed to bend downwards, forming a downward-directing outlet. This allows rainwater passing through the overflow pipe 21 to be stably and vertically discharged into the river or stream below the bridge, thus avoiding water stain erosion or drainage splashing problems on other parts of the bridge. In particular, the vertical section 211 can also accommodate a certain volume of rainwater, serving as initial water storage and water pressure buffering, helping to reduce the impact of instantaneous high pressure on the drainage system and extending the system's service life.

[0039] Reference Figure 3 , Figure 4 As shown, a second electrically operated valve 22 is installed on the overflow pipe 21 to control whether rainwater is discharged through the overflow path. Specifically, the second electrically operated valve 22 is preferably installed at the vertical section 211 of the overflow pipe 21 to facilitate effective control before rainwater enters the overflow path. This second electrically operated valve 22 can be automatically opened and closed by signal control and is electrically connected to the central controller 4 to ensure the intelligent linkage operation of the entire system. To achieve more precise opening and closing judgment, a level gauge 23 is also installed on the suspension pipe 1 section 11 connected to the overflow pipe 21. The level gauge 23 is also electrically connected to the controller 4 to monitor the water level in the pipe in real time.

[0040] With the above structural arrangement, during system operation, when excessive rainwater accumulates on the bridge deck or a sudden increase in rainfall causes the water level in the suspension pipe 1 to gradually rise, the level gauge 23 can instantly collect the current water level data and transmit it to the controller 4 (central control terminal). After receiving the signal, the controller 4 analyzes and judges the data, and when the water level reaches the preset start-up threshold, it issues a control command to drive the second electric switch valve 22 to open, thereby opening the overflow pipe 21 channel. This allows excess rainwater to be discharged through the overflow pipe 21 along a set path, quickly diverting the water and preventing drainage system malfunctions or bridge deck backflow caused by excessively high water levels.

[0041] Under normal operating conditions, the system maintains normal operation. The controller 4 continuously receives the water level signal detected by the level gauge 23 and maintains communication with the electric switching valve. When the water level is within the normal range, the second electric switching valve 22 remains closed, and rainwater preferentially flows through the suspension pipe 1 and its branches into the rainwater storage tank 32 or other drainage channels. Once the water level rises and reaches the set safety threshold, the controller 4 immediately controls the second electric switching valve 22 to open, initiating the overflow drainage function to ensure the operational safety and smooth drainage of the suspension pipe 1 section, achieving automated, intelligent, and segmented linkage control of the system. This configuration can significantly improve the response capability of the bridge drainage system under complex climatic conditions, ensuring stable, efficient, and lag-free bridge deck drainage, which helps extend the service life of the bridge and improve traffic safety in rainy weather. At the same time, the opening and closing of the second electric switching valve 22 on the overflow pipe 21 of the specific pipe section 11 can be adaptively controlled according to the pressure state within that pipe section 11, avoiding problems such as local blockage of the pipe section 11 leading to excessive internal pressure, causing pipe damage or bridge deck backflow.

[0042] It is important to emphasize that when a traffic accident occurs on the bridge deck, especially in cases involving oil or chemical spills that could potentially pollute water bodies, the controller 4 will immediately switch to accident response mode upon receiving accident signals from the bridge monitoring system, environmental sensors, or manual input. It will then control the second electrically operated valve 22 in the overflow assembly 2 to remain closed, effectively blocking the overflow channel of the suspension pipe 1 and preventing polluted rainwater from being directly discharged into the river through the overflow pipe 21. This response mechanism ensures that, in the event of an accident, rainwater from the bridge deck will not be discharged into environmentally sensitive water areas without treatment, minimizing the risk of damage to the aquatic ecosystem and realizing the proactive safety control function of the bridge rainwater system in terms of environmental protection.

[0043] Reference Figure 4 , Figure 5As shown, because silt on the bridge deck easily enters the drainage system with rainwater and accumulates inside the suspended pipe 1, especially in the section 11 where the flow velocity is low, it can cause poor drainage or even blockage, thus affecting the overall drainage efficiency of the bridge's rainwater system. Therefore, in order to enable periodic cleaning and maintenance of the inside of the pipe section 11, an inspection port 112 is also provided on the pipe section 11 for manual or mechanical access to the inside of the pipe for silt cleaning and maintenance.

[0044] Reference Figure 5 As shown, the inspection port 112 is specifically designed as a tubular structure, with a compact overall structure that does not affect the main drainage function. In the specific installation structure, the tubular inspection port 112 can be processed into a T-shape, i.e., a tee form. This facilitates a reasonable branch connection with the main flow direction of the suspended pipe section 11. The two ends of the T-shaped inspection port 112 are connected to the suspended pipe section 1 through standard flange interfaces, ensuring the sealing and disassembly of the connection, facilitating later maintenance operations. The outward-facing end of the inspection port 112 is sealed with a sealing plate 1121 through a flange. During normal operation, the sealing plate 1121 is in a sealed and closed state to prevent rainwater leakage. When cleaning operations are required, workers only need to remove the sealing plate 1121 to enter the pipe through the inspection port 112 for manual or vacuum cleaning of mud, sand, and debris, thereby effectively extending the service life of the drainage system and ensuring the system's smooth operation under extreme weather conditions such as heavy rain.

[0045] As an optional embodiment, considering that the suspended pipe 1 system is installed on the outside of the bridge box girder 8, this location is exposed to the outdoor environment year-round and is significantly affected by temperature changes, especially during periods of large temperature differences between day and night or seasonal transitions. The drainage pipe system is prone to loosening of joints and decreased sealing due to thermal expansion and contraction, and may even face the risk of detachment and rupture. To address this issue, a corrugated compensating pipe 6 is installed between two adjacent pipe sections 11. The corrugated compensating pipe 6 is connected to the adjacent two suspended pipe sections 11 via flanges. It is used to absorb axial, radial, or angular displacements caused by temperature changes or structural vibrations, thereby effectively alleviating stress concentration problems caused by structural deformation, enhancing the flexibility and connection stability of the entire drainage system, and improving the reliability and safety of system operation.

[0046] As an optional embodiment, to further enhance the durability and environmental adaptability of the corrugated compensating pipe 6, an inner lining layer made of polytetrafluoroethylene (PTFE) rubber is provided on the inner wall of the corrugated compensating pipe 6. The PTFE rubber layer has excellent corrosion resistance, resisting the corrosion of acids, alkalis, and salt spray commonly found in rainwater on bridge decks, making it particularly suitable for applications like bridges that are constantly exposed to harsh outdoor environments. Simultaneously, its high-temperature resistance effectively resists the impact of high summer temperatures on the structure of the corrugated compensating pipe 6, preventing deformation or decomposition of the inner wall material, thereby ensuring stable and smooth flow within the compensating pipe. It is worth noting that in the specific selection and construction, the materials and manufacturing processes of the corrugated compensating pipe 6 must strictly adhere to relevant national industry standards and engineering specifications to ensure that the quality of the corrugated compensating pipe 6 used is controllable and its performance is qualified, thus guaranteeing the safety and reliability of the entire bridge rainwater drainage system from the source.

[0047] As an optional embodiment, the corrugated compensation pipe 6 preferably adopts a steel corrugated pipe structure, that is, the corrugated body is made of high-strength stainless steel, which has good structural strength and durability. Compared with traditional plastic pipes, steel corrugated pipes not only have higher mechanical strength, capable of withstanding external impacts, wind loads, and the effects of micro-vibrations of the bridge itself, but also have stronger fire resistance and antifreeze properties, making them particularly suitable for use in cold northern regions and coastal areas with strong sea wind and salt spray corrosion. The steel corrugated pipe is connected to flanges and reinforced by welding or bolting, resulting in better overall sealing and tensile strength. It can adapt to bridge structural displacement and vibration over a long period of time, achieving a safe and reliable elastic connection, and providing structural support for the stable operation of the intelligent segmented overflow drainage device.

[0048] Preferably, two sets of emergency pool 31 and two sets of rainwater storage pool 32 are symmetrically arranged at the abutments 9 at both ends of the bridge, and are installed in the bridge structure through embedded foundations or lateral arrangement according to the structural space conditions of the abutments 9. By setting independent emergency pools 31 and rainwater storage pools 32 at both ends of the bridge, zoned storage and discharge under different working conditions can be achieved while ensuring the rationality of the bridge structure layout. Among them, the emergency pool 31 is dedicated to emergency water collection in case of emergencies. When a traffic accident occurs on the bridge surface and harmful liquids such as oil and chemicals flow into the drainage system with rainwater, the polluted rainwater can be guided to be concentrated and discharged into the emergency pool 31 for temporary storage and subsequent treatment through a valve-controlled switching mechanism, thereby effectively preventing pollutants from being directly discharged into the river below and ensuring the safety of the water ecology. The rainwater storage pool 32 mainly undertakes the function of rainwater collection and storage under normal meteorological conditions, used to reduce the impact load of river water, and can also be used for rainwater resource reuse scenarios.

[0049] Preferably, the rainwater storage tank 32 is equipped with a rainwater discharge outlet.

[0050] Furthermore, the suspended pipe 1 is also divided into two groups, extending symmetrically from the middle of the bridge to both ends. Each group is connected to the emergency pool 31 and the rainwater storage pool 32 at the corresponding abutment 9, respectively, to achieve localized diversion and discharge of rainwater from the bridge deck. This design avoids the centralized layout of pipes for unified drainage across the entire bridge, thus significantly reducing the construction complexity and cost of new pipelines and effectively solving the spatial limitations of the existing bridge deck drainage system. At the same time, the symmetrical arrangement of the groups allows the suspended pipe 1 to share the water volume during heavy rainfall, reducing the water catchment density and preventing backflow and overflow caused by excessive water catchment, which is conducive to maintaining the stable operation of the entire bridge deck drainage system.

[0051] To further optimize the overflow discharge path, the installation height of the horizontal sections 212 of multiple overflow pipes 21 is preferably set as a structural gradient that gradually decreases from the bridge ends to the middle of the bridge, thus forming a functional guide that prioritizes the discharge of rainwater from the middle of the bridge. Considering that the middle of the bridge is usually above the main current of the river and is often far from pedestrian walkways and equipment installation areas on the bank, when the system detects that the rainwater flow exceeds the upper limit of the suspension pipe 1, the overflow pipe 21 located at the lowest height in the middle will start drainage first, thereby achieving the effect of quickly introducing rainwater into the river from the middle and relieving the drainage pressure at both ends. This arrangement not only significantly reduces the traffic pressure caused by water accumulation in the middle and rear sections of the bridge deck, but also avoids a large amount of rainwater concentrating and impacting the bank slope or abutment structure, improving structural durability and water safety.

[0052] As an optional embodiment, rainwater flow exceeding the bridge's design return period can be overflowed in sections through the suspension pipe 1 to avoid the risk of the suspension pipe 1 being too large, which could cause safety issues during installation and the risk of it falling.

[0053] Preferably, an insect-proof net 5 is fixedly installed at the outlet end of the overflow pipe 21 to prevent various small animals (such as insects, rats, birds, etc.) from accidentally entering the drainage system, thereby avoiding blockage or decay of foreign objects that could cause pipe pollution and drainage failure. The structure of the insect-proof net 5 needs to be designed for durability and safety in conjunction with the actual operating environment of the bridge, and it should maintain its protective effectiveness even after long-term exposure to wind, rain, and the damp environment of the riverbank.

[0054] Regarding the installation method of the insect net 5, different forms can be selected according to the requirements of ease of maintenance and structural sturdiness. For example, when using a snap-on installation structure, the insect net 5 can be nested into the outlet end of the overflow pipe 21 through the elastic slot, which is convenient for future disassembly and cleaning; or a threaded connection method can be used to make the insect net 5 firmly screwed into the outlet of the overflow pipe 21 through the thread, which enhances the impact resistance and is suitable for high flow rate overflow environments.

[0055] As an optional embodiment, the insect net 5 is made of a composite material with high elasticity and toughness. This material must have anti-gnawing properties to prevent rodents such as rats from damaging its structure. Preferably, such materials use weather-resistant and corrosion-resistant elastic polymers or metal wire mesh composite structures, ensuring both protective strength and a certain degree of flexibility.

[0056] Furthermore, to adapt to special operating conditions such as sudden heavy rainfall or instantaneous high pressure during drainage, the insect net 5 is designed with strain-expanding characteristics. When the instantaneous water pressure during drainage exceeds a preset threshold, the insect net 5 structure deforms under stress, and the mesh temporarily expands, thereby effectively reducing water resistance and avoiding drainage back pressure or backflow problems caused by mesh surface resistance. When the water pressure returns to below the normal value, the elastic structure automatically returns to its original shape, the mesh returns to its normal size, and continues to maintain the function of blocking foreign objects. This structure balances protection and drainage efficiency, and is suitable for the actual operating needs of intelligent overflow drainage systems.

[0057] Reference Figure 2 , Figure 3 As shown, the suspended pipe 1 is preferably fixedly installed through a combination structure of multiple sets of pipe clamps 7 and suspension brackets 71. Each set of pipe clamps 7 is looped around the outer wall of the suspended pipe 1 and connected by high-strength bolts to achieve stable positioning of the suspended pipe 1. One end of the suspension bracket 71 is fixedly connected to the pipe clamp 7, and the other end is anchored to the structural web or bottom plate below the bridge box girder 8 to ensure stable support of the pipeline under gravity, self-weight vibration, and sudden working conditions.

[0058] Preferably, the suspension frame 71 can adopt a U-shaped or L-shaped reinforced support structure, and fatigue-resistant elastic buffer pads can be arranged according to the bridge span and vibration characteristics to absorb external impact loads, bridge vibrations or instantaneous water flow impact force during drainage, thereby effectively avoiding the problem of pipe or support deformation and detachment caused by long-term dynamic loads.

[0059] Of course, in other embodiments, the suspended pipe 1 can also be installed using methods such as bracket-type clamps, inclined tie rod structures, or track hook sliding components, depending on the bridge type, spatial layout, and maintenance requirements, to improve system adaptability and ease of maintenance. For example, magnetic-mechanical hybrid installation technology can be used in steel structure bridges; in space-constrained areas, a side-groove embedded positioning structure can be used to achieve stable pipe installation.

[0060] In various implementations, the suspended pipe 1 preferably adopts an inner thin-walled steel pipe structure, that is, using high-strength metal material as the base material and a corrosion-resistant lining layer on its inner wall, to significantly improve the overall compressive strength, impact resistance, and service life. Especially in application scenarios where the environment is exposed to high humidity, strong salt spray, or oily contamination for a long time, this type of composite pipe can effectively resist the corrosive effects of internal fluids, ensuring the reliability of the drainage system during long-term use.

[0061] As an optional embodiment, the connection between the sections of the suspension pipe 1 preferably adopts a double-press connection structure, that is, an annular pressing groove is set at the pipe end, and the connector is simultaneously squeezed and deformed inside and out using professional tools to achieve a high-strength threadless sealing connection. Compared with traditional welding or threaded connections, this method not only has high installation efficiency and stable connection strength, but also has good sealing performance and resistance to thermal expansion and contraction, making it suitable for use in scenarios such as bridges where the structure has frequent dynamic responses.

[0062] It should be noted that, since the rainwater system pipelines need to collect and transfer emergency water, traditional metal pipes (steel pipes, ductile iron pipes, etc.) are easily corroded by emergency water. Therefore, the pipe components involved in this device, such as the suspension pipe 1 and overflow pipe 21, must be made of materials with corrosion resistance, high temperature resistance, and UV aging resistance. Specifically, stainless steel composite pipes, high-molecular modified polyethylene pipes (such as PE-X, PVDF), or metal-plastic composite structures with inner lining coatings, such as epoxy resin linings, PTFE coatings, etc., or metal pipes with plastic linings, can be preferred, depending on the various working conditions of the bridge drainage system. This ensures the bridge can withstand long-term operation under complex environments such as high temperature exposure, heavy rain erosion, and chemical pollution, and solves the problem of pipe system disconnection caused by large outdoor temperature differences. The above structure effectively solves the problems of traditional bridge suspension pipes 1, which generally use UPVC plastic pipes, which are prone to aging after sun exposure; and insufficient expansion and contraction under large temperature differences, leading to pipe aging and detachment.

[0063] The specific working process of this embodiment is as follows: First, the first electric switch valve 30 and the second electric switch valve 22 of the overflow drainage device can transmit signals to the central control terminal via wired or wireless means, and the central control terminal can then send commands in reverse to achieve signal transmission.

[0064] 1. Initial Rainfall Condition: When the rainwater on the bridge is a light rain, the suspension pipe 1 is in a low liquid level and not full flow state. The liquid level gauge 23 monitors the liquid level signal and transmits it to the central control terminal. The central control terminal issues a command, and the first electric switch valve 30 on the rainwater storage tank 32 under the bridge opens, and the initial rainwater on the bridge surface enters the rainwater storage tank 32. 2. Heavy rain condition: When the rainwater on the bridge is heavy rain and the suspension pipe is at a high level or full flow, the level gauge 23 monitors the level signal and transmits it to the central control terminal. The central control terminal issues an instruction to close the first electric switch valve 30 of the rainwater storage tank 32, and the rainwater on the bridge surface is discharged into the river through the overflow pipe 21. 3. Accident conditions: When the bridge experiences an accident with rainwater, the bridge management unit issues an emergency signal. The suspension pipe 1 is in a low-level, non-full-flow state. The level gauge 23 monitors the level signal and transmits it to the central control terminal. The central control terminal issues an instruction to close the first electric switch valve 30 of the rainwater storage tank 32 and open the first electric switch valve 30 of the accident tank 31. 4. Heavy rain conditions: When the rainwater on the bridge is heavy to torrential (exceeding the design return period standard rainwater), the suspension pipe 1 is at a high level or full flow. The level gauge 23 monitors the level signal and transmits it to the central control terminal. The central control terminal issues an instruction to close the first electric switch valve 30 of the rainwater storage tank 32 and the first electric switch valve 30 of the emergency tank 31. The rainwater on the bridge deck overflows in sections through the overflow pipe 21 of the suspension pipe 1.

[0065] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A smart segmented overflow drainage device for a bridge rainwater system, characterized in that, include: The suspension pipe (1) is installed below the box girder (8) of the bridge. The suspension pipe (1) is composed of several interconnected pipe sections (11). Each pipe section (11) is connected to a rainwater inlet connecting pipe (111) that is connected to the rainwater inlet (81) on the bridge deck. Overflow components (2) are respectively installed on each of the pipe sections (11) to discharge excess rainwater when the rainwater flow rate in the suspended pipe (1) exceeds a preset threshold, so as to realize segmented overflow; Branch pipe (3), the outlet end of the suspension pipe (1) is connected to the emergency pool (31) and the rainwater storage pool (32) respectively through the branch pipe (3), and each of the branch pipes (3) is equipped with a first electric switch valve (30). Controller (4) is used to control the opening and closing state of the first electric switching valve (30): Under normal operating conditions, the first electric switch valve (30) connected to the emergency pool (31) is closed, and the first electric switch valve (30) connected to the rainwater storage pool (32) is opened. In the event of an accident, the first electric switch valve (30) connected to the accident pool (31) is opened, and the first electric switch valve (30) connected to the rainwater storage pool (32) is closed.

2. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 1, characterized in that, The overflow assembly (2) includes an overflow pipe (21), which sequentially includes a vertical section (211), a horizontal section (212), and a bent section (213); wherein, One end of the vertical section (211) is connected to the corresponding pipe section (11), and the other end is connected to the horizontal section (212). The bent section (213) is the outlet end of the overflow pipe (21) and is connected to the horizontal section (212).

3. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 2, characterized in that, The overflow pipe (21) is equipped with a second electric switching valve (22), which is electrically connected to the controller (4); wherein, A level gauge (23) is installed on the pipe section (11) corresponding to the overflow pipe (21), and the level gauge (23) is also electrically connected to the controller (4); Under normal operating conditions, the controller (4) is used to receive the water level signal detected by the level gauge (23), and when the water level reaches a preset threshold, it controls the second electric switch valve (22) to open to start overflow drainage.

4. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 1, characterized in that, The pipe section (11) is also provided with an inspection port (112), and the inspection port (112) is connected to a sealing plate (1121) by a flange seal.

5. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 2, characterized in that, An insect-proof net (5) is fixedly installed at the outlet end of the overflow pipe (21).

6. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 1, characterized in that, A corrugated compensating pipe (6) is connected between two adjacent pipe sections (11) via a flange.

7. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 6, characterized in that, The corrugated compensating pipe (6) is lined with a polytetrafluoroethylene rubber layer. And / or, the corrugated compensating pipe (6) is a steel corrugated pipe.

8. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 2, characterized in that, The accident pool (31) and the rainwater storage pool (32) are each provided in two sets, which are respectively located at the bridge abutments (9) at both ends of the bridge; the suspension pipe (1) is also divided into two sets, which extend symmetrically from the middle of the bridge and are respectively connected to the accident pool (31) and the rainwater storage pool (32) located at both ends. And / or, the height of the horizontal section (212) of the plurality of overflow pipes (21) gradually decreases from the end of the bridge toward the middle.

9. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 5, characterized in that, The insect-proof net (5) is made of elastic material and has a deformable structure. When the mesh of the insect-proof net (5) encounters water pressure exceeding a set threshold, it can temporarily expand to reduce drainage resistance. When the water pressure drops to the normal range, the mesh automatically returns to its original shape.

10. The intelligent segmented overflow drainage device for bridge rainwater systems according to claim 1, characterized in that, The suspension pipe (1) is fixedly installed by multiple sets of pipe clamps (7) and suspension frame (71). Each set of pipe clamps (7) is sleeved on the outside of the suspension pipe (1). One end of the suspension frame (71) is fixedly connected to the pipe clamp (7), and the other end is set below the box girder (8) of the bridge.

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