Water environment sensitive area bridge floor runoff collection and treatment system

Abstract

The utility model discloses a bridge floor runoff collecting and processing system for a water environment sensitive area, which comprises a runoff collecting unit, a processing unit and a monitoring system, the processing unit comprises a settling pond, an accident emergency pond and a water outlet pond, and the settling pond is communicated with the water outlet pond; the outlet of the converging main pipe is divided into two branches, one branch is connected with the sedimentation tank, and the other branch is connected with the accident emergency tank; the monitoring system comprises a tower pole, a detection shooting piece, a rainfall monitoring piece, an audible and visual alarm and a water quality monitoring unit which are arranged on the tower pole, and a hazardous gas alarm arranged on the accident emergency pool. According to the utility model, the monitoring system is used for monitoring and identifying bridge floor accident site conditions, rainfall conditions, water quality conditions in pipelines, and rainwater and accident waste water quantity conditions in the pool body in real time, so that the rainwater and the accident waste water can be collected and discharged in a classified manner under correct operation procedures.

Description

Technical Field

[0001] The utility model relates to the technical field of runoff treatment on roads in water environment sensitive areas, in particular to a bridge surface runoff collection and treatment system in water environment sensitive areas. Background Art

[0002] In existing construction, some bridge projects inevitably cross key water-sensitive areas (such as drinking water source protection areas and aquatic biological conservation areas). For these bridges, if hazardous chemical transport vehicles traverse these sections and a traffic accident results in a hazardous chemical leak, the chemicals could easily enter the sensitive water bodies beneath the bridge, causing serious contamination of sensitive areas such as drinking water and aquatic ecosystems, making subsequent disposal difficult. Therefore, relevant regulations require that water protection be emphasized in water-sensitive sections to prevent water pollution caused by improper drainage. However, most bridge projects fail to consider the impact of the subsequent operation of hazardous chemical transport vehicles on water-sensitive sections during design and construction. Bridge runoff collection and emergency sedimentation tanks are not coordinated in their design. As a result, existing facilities cannot simultaneously meet the requirements of bridge runoff collection and emergency sedimentation tanks. Furthermore, effective protective measures cannot be implemented promptly after an accident, leading to the continued expansion of the pollution incident and failing to achieve the goal of protecting water bodies in key water-sensitive sections. Summary of the Invention

[0003] In view of this, the utility model proposes a bridge deck runoff collection and treatment system in water environment sensitive areas.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The utility model discloses a bridge runoff collection and treatment system for water environment sensitive areas, comprising a runoff collection unit, a treatment unit, and a monitoring system. The runoff collection unit comprises a confluence main pipe and a collection pipe connected to each drainage outlet on the bridge deck; the treatment unit comprises a sedimentation tank, an emergency tank, and a water outlet tank, the sedimentation tank and the water outlet tank being interconnected; the outlet of the confluence main pipe is divided into two branches, one branch of which is connected to the sedimentation tank, and the other branch is connected to the emergency tank;

[0006] The sedimentation tank has a first water inlet, a slag discharge port, and a vertically opened adjustable water outlet. The first water inlet and the slag discharge port are oppositely opened on a pair of side walls of the sedimentation tank, and the slag discharge port is located at the lower part of the sedimentation tank. The adjustable water outlet is opened on the side wall of the sedimentation tank near the slag discharge port and is connected to the water outlet tank.

[0007] The accident emergency pool has a second water inlet and an overflow port, wherein the second water inlet is located at the upper part of the accident emergency pool, and the overflow port is connected to the sedimentation tank and its height is lower than the second water inlet;

[0008] The monitoring system includes a tower, a detection and shooting component, a rainfall monitoring component and an audible and visual alarm arranged on the tower, and also includes a water quality monitoring unit arranged on the confluence main and a hazardous gas alarm arranged on the accident emergency pool. The signal output ends of the detection and shooting component, the rainfall monitoring component and the water quality monitoring unit are connected to the signal input ends of the control system, and the alarm signal output end of the control system is respectively connected to the alarm signal input ends of the audible and visual alarm and the hazardous gas alarm.

[0009] Preferably, a water inlet buffer structure is provided in the sedimentation tank, and the water inlet buffer structure is installed on the water inlet side wall of the sedimentation tank below the first water inlet, and includes an upper buffer plate and a lower buffer plate, both of which have water permeable holes. The upper buffer plate extends obliquely from the water inlet side wall toward the front of the first water inlet, and the lower buffer plate is installed below the upper buffer plate and its inclination direction is opposite to that of the upper buffer plate.

[0010] Preferably, the sedimentation tank is provided with a sedimentation trough extending from the first water inlet toward the slag discharge port and a slag cleaning mechanism for cleaning the sedimentation trough, and the sedimentation trough is a trapezoidal trough with a smaller bottom and a larger top;

[0011] The slag cleaning mechanism includes a scraper plate with a structure consistent with the sediment trough and a traction mechanism that drives the scraper plate to move along the sediment trough. The traction mechanism includes a power source arranged at the top of the sedimentation tank, a drum driven by the power source, and a pulley guide assembly arranged in the sedimentation tank. The wire rope on the drum is wound around the pulley guide assembly, and the scraper plate is fixedly connected to the wire rope located in the sedimentation tank.

[0012] Preferably, the pulley guide assembly is installed on the long side wall of the sedimentation tank in the same direction as the sedimentation trough, and includes two upper guide wheels and two lower guide wheels arranged at intervals on the long side wall. One end of the wire rope on the drum passes around the bottom of the first upper guide wheel and then passes around the top of the second upper guide wheel, and then passes around the bottom of the two lower guide wheels and extends upward out of the top wall of the sedimentation tank and is wound on the drum; an upper guide slide is provided on the scraper plate, and the wire rope located between the two upper guide wheels passes through the upper guide slide, and the lower part of the scraper plate is fixedly connected to the wire rope located between the two lower guide wheels.

[0013] Preferably, the scraper plate is tiltedly arranged in the sediment trough, and the lower part of the scraper plate has an opening, and a one-way door is hinged at the opening, and the one-way door is opened by resistance when the scraper plate returns.

[0014] Preferably, the adjustable water outlet is vertically arranged on the side wall between the sedimentation tank and the water outlet tank, the bottom of the adjustable water outlet is higher than the slag discharge port and the top is lower than the first water inlet; an adjusting structure for adjusting the water outlet height of the adjustable water outlet is provided in the water outlet tank.

[0015] Preferably, the adjustment structure includes guide rails vertically arranged on both sides of the adjustable water outlet and a partition for blocking the adjustable water outlet. The two guide rails are relatively arranged to form a limiting slide that cooperates with the partition. The partition is slidably installed in the limiting slide. The top of the partition has an arc-shaped groove with the center located above. When the partition is at the highest point, its arc-shaped groove and the top of the adjustable water outlet form an overflow hole.

[0016] Preferably, a lifting chain is provided on the top of the partition, and a traction rope driven by a winch is provided on the top of the water outlet pool, and the traction rope is connected to the lifting chain.

[0017] Preferably, the outlet of the confluence main is connected to the two branches via a three-way joint, and each branch is provided with a solenoid valve; or the outlet of the confluence main is connected to the two branches via a two-position three-way solenoid valve.

[0018] Preferably, a sloped buffer platform is provided on the bottom wall of the water outlet pool below the adjustable water outlet, which can slow down the impact of water flow on the one hand; on the other hand, the sloped buffer platform has a certain protective effect on the guide rail, preventing debris in the water outlet pool from entering the guide rail.

[0019] The utility model solves the problems of the current bridge runoff collection system's inability to identify bridge accident wastewater, inadequate emergency response measures in the event of an accident, the collection system's inability to classify and process wastewater, and the lack of intelligent operation. The utility model can achieve classified treatment of rainwater and accident wastewater in bridge runoff, can adjust the water output in real time according to the amount of rainfall, and enhance the precipitation treatment effect of rainwater. At the same time, it uses mechanical means to automatically discharge rainwater sediment to avoid mud and residue deposition, ensuring the sedimentation effect of the sedimentation tank. The utility model uses a monitoring system to monitor and identify the bridge accident scene, rainfall, water quality in the pipeline, and the amount of rainwater and accident wastewater in the tank in real time, ensuring that rainwater and accident wastewater can be classified, collected, and discharged under the correct operating procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the utility model of a bridge deck runoff collection and treatment system for water environment sensitive areas.

[0021] Figure 2 It is a top view of the processing unit of the utility model.

[0022] Figure 3 It is a top view of the sedimentation tank described in the utility model.

[0023] Figure 4 yes Figure 3 AA direction schematic diagram.

[0024] Figure 5 yes Figure 4 BB direction schematic diagram.

[0025] Figure 6 It is a schematic diagram of the slag cleaning mechanism.

[0026] Figure 7 It is a structural diagram of the scraper plate.

[0027] Figure 8 It is a side view of the scraper.

[0028] Figure 9 This is a schematic diagram of the outlet pool.

[0029] Figure 10 It is a top view of the adjustment structure.

[0030] Figure 11 It is a schematic diagram of the assembly of partitions and guide rails.

[0031] Figure 12 It is a diagram showing the relative positions of the regulating structure and the regulating outlet.

[0032] Figure 13 This is the elevation view of the accident emergency pool.

[0033] Figure 14 This is an overhead view of the accident emergency pool. DETAILED DESCRIPTION

[0034] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0035] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0036] In the description of this utility model, unless otherwise specified or limited, the terms "connected" and "connection" that may appear should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium, or it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood based on specific circumstances.

[0037] like Figure 1-14 As shown, the water environment sensitive area bridge deck runoff collection and treatment system of the present invention includes a runoff collection unit, a treatment unit, and a monitoring system. The runoff collection unit has a confluence main pipe 1.1 and a collection pipe 1.3 connected to each drain outlet 1.2 on the bridge deck. The width direction of the bridge deck generally has a certain slope from the center of the road to both sides. The drain outlets 1.2 are arranged side by side on both sides of the bridge deck to facilitate runoff collection.

[0038] The treatment unit includes a sedimentation tank 2, an accident emergency tank 3 and an outlet tank 4. The sedimentation tank 2 and the outlet tank 4 are interconnected, and the upper clear water after sedimentation can enter the outlet tank 4 and be discharged through the outlet tank 4; the outlet of the confluence main 1.1 is divided into two branches, one of which is connected to the sedimentation tank 2, and the other is connected to the accident emergency tank 3. During actual installation, the outlet of the confluence main 1.1 is connected to the two branches through a three-way joint, and each branch is provided with a solenoid valve, which can be controlled to achieve free switching between the two branches and the confluence main 1.1; of course, the outlet of the confluence main 1.1 can also be connected to the two branches through a two-position three-way solenoid valve, and free switching between the two branches and the confluence main 1.1 can be achieved by controlling the two-position three-way solenoid valve; the sedimentation tank 2, the accident emergency tank 3 and the outlet tank 4 are all located below the bridge deck, so that the liquids that converge together automatically flow into the sedimentation tank 2 or the accident emergency tank 3 by gravity and height difference, and rainwater and accident leakage liquid automatically flow into the sedimentation tank 2 or the accident emergency tank 3, to achieve classified treatment;

[0039] The sedimentation tank 2 is a rectangular parallelepiped structure having a first water inlet 2.1, a slag discharge port 2.2 (with a third valve installed), and a vertically opened adjustable water outlet 2.3. The first water inlet 2.1 and the slag discharge port 2.2 are oppositely arranged on a pair of side walls of the sedimentation tank 2, with the slag discharge port 2.2 located at the lower portion of the sedimentation tank 2. The adjustable water outlet 2.3 is arranged on a long side wall 2.6 near the slag discharge port 2.2 and is connected to the water outlet tank 4. For the convenience of description, the utility model refers to the side wall corresponding to the first water inlet 2.1 as the water inlet side wall 2.4, the side wall provided with the slag discharge port 2.2 as the slag discharge side wall 2.5, and the other pair of side walls of the sedimentation tank 2 as the long side wall 2.6. The water outlet tank 4 is arranged adjacent to the sedimentation tank 2, and the bottom of one of its side walls has a drain port a with a first valve, which can directly discharge the clear rainwater after sedimentation.

[0040] The accident emergency pool 3 has a second water inlet 3.1, an overflow port 3.2 and a waste outlet 3.3. The second water inlet 3.1 is located at the upper part of the accident emergency pool 3, and the overflow port 3.2 is provided on the side wall between the sedimentation tank 2 and the accident emergency pool 3 (of course, in actual construction, the overflow port 3.2 of the accident emergency pool 3 and the sedimentation tank 2 can also be connected together using a connecting pipe). The height of the overflow port 3.2 is lower than the second water inlet 3.1. A waste outlet 3.3 with a second valve is provided at the bottom of the side wall of the accident emergency pool 3 opposite to the overflow port 3.2. The collected accident leaked liquid can be discharged into a receiving container through the waste outlet 3.3 to facilitate the receiving unit to process the collected accident leaked liquid and avoid environmental pollution as much as possible. In addition, the accident emergency pool 3 of the utility model is set according to the volume of large hazardous chemicals. When encountering rainy weather + accidents, the runoff volume is often relatively large. The liquid in the accident emergency pool 3 enters the sedimentation tank 2 through the overflow port 3.2 to increase the holding volume.

[0041] The monitoring system includes a tower 8.1, a detection camera (such as a detection camera 8.2), a rainfall monitoring device, and an audible and visual alarm 8.5 mounted on tower 8.1. It also includes a water quality monitoring unit 8.3 mounted on the confluence main 1.1 and a hazardous gas alarm mounted on the emergency pool 3. The signal outputs of the detection camera 8.2, the rainfall monitoring device (rainfall sensor 8.4), and the water quality monitoring unit 8.3 are connected to the signal inputs of the control system. The alarm signal outputs of the control system are connected to the alarm signal inputs of the audible and visual alarm 8.5 and the hazardous gas alarm 8.6, respectively. A solar energy storage system can also be installed on tower 8.1 to convert solar energy into electrical energy. This provides energy for the electrical components (such as the detection camera and rain gauge) of the present invention. To ensure proper operation of the present invention, the present invention is connected to the municipal power grid to ensure a source of electrical energy. A wireless network transmitter and receiver is mounted on the top of tower 8.1. The control system is connected to a host computer via the wireless network transmitter and receiver, enabling remote monitoring and control. In actual operation, the detection camera 8.2 can identify vehicles on the bridge deck and transmit the information to the control system. If a vehicle is stuck on the bridge deck for more than a certain period of time, the control system controls the sound and light alarm 8.5 to sound a warning, prompting the vehicle to leave as soon as possible, thereby reducing traffic accidents caused by long-term vehicle stagnation. The control system can be integrated into the traffic management system. If a vehicle has not left after a certain period of time, it is determined that the vehicle has been involved in an accident. The traffic management department can then take further action based on the accident warning to minimize traffic accidents.

[0042] The water quality monitoring unit 8.3 is used to monitor the liquid information flowing through the confluence main 1.1. When the liquid is rainwater, it directly enters the sedimentation tank 2. The supernatant water after sedimentation overflows into the outlet tank 4 and is directly discharged through the drain port a at the bottom of the outlet tank 4; when the liquid is a leaked liquid (such as a chemical liquid), the converged liquid directly flows into the accident emergency tank 3 below, which is convenient for subsequent centralized treatment of the liquid.

[0043] Combine Figure 1 It can be seen that a water inlet buffer structure is provided in the sedimentation tank 2, and the water inlet buffer structure is installed on the water inlet side wall 2.4 (installed on the inner side) below the first water inlet 2.1, which includes an upper buffer plate 5.1 and a lower buffer plate 5.2, both of which have water permeable holes. The inclination directions of the upper buffer plate 5.1 and the lower buffer plate 5.2 are opposite. The upper buffer plate 5.1 extends obliquely upward from the water inlet side wall 2.4 and extends to the front of the first water inlet 2.1. The lower buffer plate 5.2 is located below the upper buffer plate 5.1, and extends obliquely downward from the water inlet side wall 2.4. The upper buffer plate 5.1 and the lower buffer plate 5.2 are both made of stainless steel mesh plates, which are used to buffer the impact of a large amount of water on the bottom of the sedimentation tank 2, thereby reducing the impact on the sedimentation sludge and improving the water quality of the outlet.

[0044] Combine Figure 3-5 It can be seen that a trapezoidal sedimentation trough 2.7 is provided at the bottom of the sedimentation tank 2. The sedimentation trough 2.7 extends from the water inlet side wall 2.4 to the sedimentation discharge side wall 2.5. A slag cleaning mechanism for cleaning the sedimentation trough 2.7 is also provided in the sedimentation tank 2. Figure 6-8It can be seen that the slag cleaning mechanism includes a scraper plate 6.1 with the same structure as the sedimentation tank 2.7 and a traction mechanism that drives the scraper plate 6.1 to move along the sedimentation tank 2.7. The traction mechanism includes a power source arranged at the top of the sedimentation tank 2, a drum driven by the power source, and a pulley guide assembly arranged in the sedimentation tank 2. The wire rope 6.5 on the drum is wound on the pulley guide assembly, and the scraper plate 6.1 is fixedly connected to the wire rope located in the sedimentation tank 2. During actual installation, in order to ensure that the scraper plate 6.1 is subjected to balanced force, the utility model has two drums, and the pulley guide assemblies are correspondingly two and are respectively installed on the water inlet side wall and the slag discharge side wall of the sedimentation tank 2. The drums and pulley guide assemblies are matched one by one. Take one set as an example: the pulley guide assembly includes two upper guide wheels 6.2 and two lower guide wheels 6.3 arranged at intervals. The drum is wound with a wire rope 6.5. One end of the wire rope 6.5 enters the sedimentation tank 2 from the top of the sedimentation tank 2 downwards, first The wire rope 6.5 passes around the bottom of the left upper guide wheel 6.2, then around the top of the right upper guide wheel 6.2, where it is redirected by the upper guide wheel 6.2 before passing around the bottom of the two lower guide wheels 6.3 at the bottom, exiting the top wall of the sedimentation tank 2 and being wound onto a reel. An upper guide pulley 6.4 is provided at the top for the wire rope 6.5 to pass through, and its lower portion is fixedly connected to the wire rope 6.5 (the lower portion of the scraper 6.1 is fixedly connected to the wire rope 6.5 located between the two lower guide wheels 6.3). In the present utility model, the lower portion of the scraper 6.1 is connected to the two wire ropes, and the two upper guide pulleys 6.4 provide guidance, effectively ensuring the stable movement of the scraper 6.1 and the effective slag removal.

[0045] Combine Figure 6-8 It can be seen that the lower part of the scraper plate 6.1 has an opening, and a one-way door 6.6 is hinged at the opening. During the scraping process, the one-way door 6.6 is in a closed state; during the return process, the one-way door 6.6 is opened under the action of the water flow, allowing the unscraped sediment to pass through the scraper plate 6.1 smoothly, avoiding the accumulation of mud and residue on the rear side of the scraper plate 6.1.

[0046] During actual installation, each reel is equipped with a power source, which includes a motor and a reducer driven by the motor. The reel shaft of the reel is connected to the output shaft of the reducer to ensure that the scraper blade 6.1 is balanced in force.

[0047] Combine Figure 9-12It can be seen that the adjustable water outlet 2.3 is vertically arranged on the side wall between the sedimentation tank 2 and the water outlet tank 4, the bottom of the adjustable water outlet 2.3 is higher than the slag discharge port 2.2 and the top is lower than the first water inlet 2.1; a slope buffer platform F is provided on the bottom wall of the water outlet tank 4 below the adjustable water outlet 2.3, which can not only reduce the impact of water flow but also protect the guide rail 7.3; an adjusting structure for adjusting the water outlet height of the adjustable water outlet 2.3 is provided in the water outlet tank 4, and the adjusting structure includes guide rails 7.3 vertically arranged on both sides of the adjustable water outlet 2.3 and a guide rail for blocking the adjustable water outlet 2.3. The partition 7.1 of the water outlet 2.3 and the two guide rails 7.3 are arranged relatively to form a limiting slide groove that cooperates with the partition 7.1. The partition 7.1 is slidably installed in the limiting slide groove. The top of the partition 7.1 has an arc groove 7.2 with the center at the top. When the partition 7.1 is at the highest point, its arc groove 7.2 and the top of the adjustable water outlet 2.3 form a circular overflow hole; when the partition 7.1 is at the lowest point, its arc groove 7.2 and the arc part of the bottom of the adjustable water outlet 2.3 coincide with each other. The water outlet height of the adjustable water outlet 2.3 can be adjusted by adjusting the height of the partition 7.1.

[0048] Combine Figure 11 It can be seen that a lifting chain is provided on the top of the partition 7.1, and a traction rope driven by a winch is provided on the top of the outlet pool 4, and the traction rope is connected to the lifting chain. In actual operation, the winch is used to drive the partition 7.1 to rise, and the dead weight can be used to lower it to achieve the adjustment of the height of the partition 7.1. In actual installation, the partition 7.1 is made of a wear-resistant and corrosion-resistant resin material, and a rubber sealing strip is provided between the partition 7.1 and the guide rail 7.3 to avoid water leakage; the guide rail 7.3 and the side wall of the outlet pool 4 are sealed together, and the lower part of the guide rail 7.3 passes through the bottom wall of the outlet pool 4 downward, providing sufficient space for the partition 7.1 to move up and down. The guide rail 7.3 and the bottom wall of the outlet pool 4 are sealed together to avoid water leakage.

[0049] In actual construction, the main structures of the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3 can be constructed using concrete, fiberglass, and other materials that are corrosion-resistant, sealed, and wear-resistant, depending on the actual situation. The pool covers of the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3 are all made of stainless steel to prevent debris from falling in or other safety accidents. The stainless steel covers of the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3 are all equipped with inspection ports to facilitate inspection, maintenance, and tank cleaning operations. Water level sensors are installed in the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3. The signal output end of the water level sensor is connected to the signal input end of the control system, and the control system is used to obtain the liquid level information in each tank. An exhaust fan is installed on the upper part of one side wall of the accident emergency tank 3. When maintenance personnel need to inspect and maintain the tank, the accident emergency tank 3 monitors the concentration of hazardous gases in the tank and transmits it to the control system. When the concentration of hazardous gases exceeds the standard, the exhaust fan is used to discharge the hazardous gases from the tank.

[0050] During actual installation, the water quality monitoring unit of the utility model includes a pH probe, a turbidity probe, a COD probe, an ammonia nitrogen probe, a total nitrogen probe and a total phosphorus probe. The signal output ends of these probes are connected to the signal input ends of the control system. The control system analyzes the received signals and determines whether the bridge surface runoff is rainwater, chemical liquid or a mixture of rainwater and chemical liquid, etc., and can perform diversion treatment based on these new signals.

[0051] The control system F of the present invention is installed on a tower or on a bridge. The present invention uses a detection camera 8.2 to transmit information about vehicles passing through the bridge deck to the control system. When a vehicle is stuck for more than a certain period of time, the control system sends an alarm signal to the sound and light alarm 8.5, which reminds the stuck vehicle to leave. If the vehicle does not leave after a certain period of time, it is determined that the vehicle is in an accident, and the sound and light alarm 8.5 reminds passing vehicles to avoid the accident vehicle. The connection between the confluence main and the sedimentation tank is in a normally closed state, and the connection between the confluence main and the accident emergency tank is in a normally open state. The leaked accident liquid, rainwater and their mixed liquid enter the confluence through the drain outlet and the collection pipe. Main pipe 1.1, the water quality monitoring unit obtains the liquid signal in the confluence main pipe 1.1 and transmits it to the control system, the control system analyzes the liquid signal, and when the liquid is rainwater, switches the confluence main pipe to a state of connection with the sedimentation tank 2, so that the rainwater enters the sedimentation tank 2 through the first water inlet, enters the outlet tank through the adjustable outlet after sedimentation 2, and finally is discharged to the external environment through the drain port a of the outlet tank 4; when the liquid is an accident liquid or a mixture of it and rainwater, the confluence main pipe 1.1 is connected to the accident emergency tank 3, so that the liquid in the confluence main pipe 1.1 directly enters the accident emergency tank, and when the amount of liquid exceeds the set volume of the accident emergency tank 3, the liquid overflows from the accident emergency tank 3 into the sedimentation tank 2. Specifically, the utility model has four working scenarios, which are no rain and no accident, no rain and accident, rain and no accident, and rain and accident:

[0052] 1. In rain-free, non-accident-free mode, the connection between sedimentation tank 2 and the confluence main is normally closed, while the connection between emergency tank 3 and the confluence main is normally open. Baffle 7.1 at adjustable outlet 2.3 is in its highest position to prepare for emergencies. In the event of an emergency, the accident liquid flows directly into emergency tank 3. If the amount of accident liquid is large, it is discharged into sedimentation tank 2 through overflow port 3.2 of emergency tank 3, increasing the volume of the accident liquid collected.

[0053] 2. When the water quality monitoring unit detects that the liquid in the confluence main 1.1 is an accident liquid, the no-rain-accident scenario mode is activated. In the no-rain-accident scenario mode, the control system first controls the sound and light alarm to alert passing vehicles to slow down and avoid the accident; the accident liquid flows through the collection pipe 1.3 and the confluence main 1.1 and then branches into the accident emergency pool 3. In actual projects, the control system can be incorporated into the traffic pipe network system. When a vehicle is determined to have an accident, traffic management personnel can remotely control and promptly direct on-site personnel to take corrective or protective measures, thereby increasing the efficiency of emergency response at the accident site and reducing the impact of the accident.

[0054] When the amount of accident liquid is less than the maximum set capacity of the accident emergency pool 3, the accident liquid will be completely collected in the accident emergency pool 3. In the later treatment, the second valve can be opened, and the accident liquid can be collected in an external container and handed over to a qualified unit for treatment, thereby reducing environmental pollution.

[0055] When the liquid level of the accident liquid in the accident emergency pool 3 exceeds a certain height, the excess accident liquid is discharged into the sedimentation tank 2 through the overflow port 3.2. When the sedimentation tank 2 is full, it overflows into the outlet tank 4, increasing the accident liquid collection volume; when the accident liquid is completely collected, the accident liquid in the accident emergency pool 3, sedimentation tank 2 and outlet tank 4 should be handed over to a qualified unit for treatment as soon as possible, so that it can be used in rainy weather;

[0056] Before cleaning the accident emergency pool 3, the hazardous gas alarm transmits a signal to the control system, and the control system analyzes the received signal. When the gas in the accident emergency pool 3 is hazardous gas, the hazardous gas alarm alarms and runs the exhaust fan to exhaust the gas. Only when there is no alarm information can the control system be operated to open the maintenance door and enter the accident emergency pool 3 to perform cleaning operations in preparation for next use.

[0057] 3. When the rain sensor detects rain or rainwater and the liquid information monitored by the water quality monitoring unit is water, it is the rainy but no accident scenario mode. In the rainy but no accident scenario mode, the confluence main 1.1 and the sedimentation tank 2 are in a connected state, the outlet height of the adjustable water outlet 2.3 is at the highest position, and the rainwater directly enters the sedimentation tank 2 through the collection pipe 1.3 and the confluence main 1.1. The upper buffer plate 5.1 and the lower buffer plate 5.2 in the sedimentation tank 2 can buffer the impact of the incoming water; in the initial stage, the initial rainwater entering the sedimentation tank 2 can remain in the sedimentation tank 2 for a period of time, so that the larger suspended particles will sink into the sedimentation tank 2.7, and the upper clear water will enter the outlet tank 4 through the adjustable water outlet 2.3. After settling for a certain period of time, the outlet height of the sedimentation tank 2 is continuously adjusted downward until the water in the sedimentation tank 2 is discharged to the lowest water level;

[0058] During heavy rainfall, baffle 7.1 is in its highest position (maintained at its highest position). When the water level in sedimentation tank 2 rises to its highest level, it overflows through the overflow hole into outlet tank 4 and is discharged through outlet a of outlet tank 4. When the rain stops, the rainwater in sedimentation tank 2 accumulates for a period of time along the sedimentation tank 2, and larger suspended particles settle into sedimentation trough 2.7. After settling for a period of time, the height of the slidable baffle 7.1 at the adjustable water inlet of outlet tank 4 is continuously adjusted downward, allowing the clearer rainwater in the upper layer of sedimentation tank 2 to slowly overflow into outlet tank 4, and then flow out of outlet a of outlet tank 4 to the outside environment until the water in sedimentation tank 2 reaches its lowest level. The sludge removal mechanism then removes the sludge in the sedimentation trough. During cleaning, the motor drives the two drums to move synchronously, causing scraper 6.1 to move from the water inlet sidewall 2.4 toward the sludge discharge sidewall, pushing the sludge deposited in sludge trough 2.7 out of the sedimentation tank 2, completing the sludge removal process.

[0059] 4. When the rain sensor detects rain or snow and the liquid monitored by the water quality monitoring unit 8.3 is suddenly an accident liquid, it is in rain and accident mode. In rain and accident mode, the control system first controls the sound and light alarm to alert passing vehicles to slow down and avoid; the outlet of the return main is switched from the connection state with the sedimentation tank 2 to the accident emergency tank 3, and the rainwater and mixed accident liquid directly enter the accident emergency tank 3 through the bridge deck drain 1.2, the collection pipe 1.3 and the runoff main; at the same time, the control system controls the winch to work, adjusts the height of the partition 7.1 to make the adjustable water outlet 2.3 at the lowest state, so that the rainwater in the sedimentation tank 2 and the outlet tank 4 is quickly discharged to the external environment; when the water level of the sedimentation tank 2 is at the lowest When the water level is low, the control system controls the winch to work in the opposite direction, so that the adjustable water outlet 2.3 is at the highest position and the drain outlet a of the outlet tank 4 is closed. The accident emergency tank 3, sedimentation tank 2 and outlet tank 4 are connected to provide sufficient storage space for the mixed rainwater and accident liquid. When the wastewater in the accident emergency tank 3, sedimentation tank 2 and outlet tank 4 reaches the maximum capacity and the water quality still contains a large amount of accident liquid, the solenoid valve on the confluence main 1.1 is closed, allowing the remaining rainwater and mixed accident liquid to flow longitudinally along the bridge deck to both banks, avoiding as much as possible from flowing into the water body of sensitive river sections.

[0060] After the rain, open the drain outlet a of the water outlet pool 4 and the waste outlet 3.3 of the accident emergency pool 3, and hand over the waste liquid to a qualified unit for disposal as soon as possible. After draining the three pools, clean them. Before cleaning, determine whether there is any dangerous gas in the pool. Specifically: the dangerous gas alarm transmits a signal to the control system, which analyzes the received signal. When the gas in the accident emergency pool 3 is dangerous gas, the dangerous gas alarm sounds and the exhaust fan runs to exhaust the gas. Only when there is no alarm information can the control system be used to open the maintenance door and enter the accident emergency pool 3 to clean it for the next use.

[0061] The utility model solves the problems of the current bridge runoff collection system's inability to identify bridge accident wastewater, inadequate emergency response measures in the event of an accident, the collection system's inability to classify and process wastewater, and the lack of intelligent operation. The utility model can achieve classified treatment of rainwater and accident wastewater in bridge runoff, can adjust the water output in real time according to the amount of rainfall, and enhance the precipitation treatment effect of rainwater. At the same time, it uses mechanical means to automatically discharge rainwater sediment to avoid mud and residue deposition, ensuring the sedimentation effect of the sedimentation tank. The utility model uses a monitoring system to monitor and identify the bridge accident scene, rainfall, water quality in the pipeline, and the amount of rainwater and accident wastewater in the tank in real time, ensuring that rainwater and accident wastewater can be classified, collected, and discharged under the correct operating procedures.

[0062] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bridge runoff collection and treatment system for water environment sensitive areas, comprising a runoff collection unit, a treatment unit, and a monitoring system, characterized by: The runoff collection unit comprises a main confluence pipe and a collection pipe connected to each drainage outlet on the bridge deck; the treatment unit comprises a sedimentation tank, an emergency tank, and a water outlet tank, the sedimentation tank and the water outlet tank being interconnected; the outlet of the main confluence pipe is divided into two branches, one branch of which is connected to the sedimentation tank and the other branch is connected to the emergency tank; The sedimentation tank has a first water inlet, a slag discharge port, and a vertically opened adjustable water outlet. The first water inlet and the slag discharge port are oppositely opened on a pair of side walls of the sedimentation tank, and the slag discharge port is located at the lower part of the sedimentation tank. The adjustable water outlet is opened on the side wall of the sedimentation tank near the slag discharge port and is connected to the water outlet tank. The accident emergency pool has a second water inlet and an overflow port, wherein the second water inlet is located at the upper part of the accident emergency pool, and the overflow port is connected to the sedimentation tank and its height is lower than the second water inlet; The monitoring system includes a tower, a detection and shooting component, a rainfall monitoring component and an audible and visual alarm arranged on the tower, and also includes a water quality monitoring unit arranged on the confluence main and a hazardous gas alarm arranged on the accident emergency pool. The signal output ends of the detection and shooting component, the rainfall monitoring component and the water quality monitoring unit are connected to the signal input ends of the control system, and the alarm signal output end of the control system is respectively connected to the alarm signal input ends of the audible and visual alarm and the hazardous gas alarm.

2. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 1 is characterized by: A water inlet buffer structure is provided in the sedimentation tank, and the water inlet buffer structure is installed on the water inlet side wall of the sedimentation tank located below the first water inlet. The water inlet buffer structure includes an upper buffer plate and a lower buffer plate, both of which have water permeable holes. The upper buffer plate extends obliquely from the water inlet side wall toward the front of the first water inlet, and the lower buffer plate is installed below the upper buffer plate and its inclination direction is opposite to that of the upper buffer plate.

3. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 1 is characterized by: The sedimentation tank is provided with a sedimentation trough extending from the first water inlet toward the slag discharge port and a slag cleaning mechanism for cleaning the sedimentation trough, wherein the sedimentation trough is a trapezoidal trough with a smaller bottom and a larger top; The slag cleaning mechanism includes a scraper plate with a structure consistent with the sediment trough and a traction mechanism that drives the scraper plate to move along the sediment trough. The traction mechanism includes a power source arranged at the top of the sedimentation tank, a drum driven by the power source, and a pulley guide assembly arranged in the sedimentation tank. The wire rope on the drum is wound around the pulley guide assembly, and the scraper plate is fixedly connected to the wire rope located in the sedimentation tank.

4. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 3 is characterized by: The pulley guide assembly is installed on the long side wall of the sedimentation tank in the same direction as the sedimentation tank, and includes two upper guide wheels and two lower guide wheels spaced apart on the long side wall. One end of the wire rope on the drum passes through the bottom of the first upper guide wheel and then passes through the top of the second upper guide wheel, and then passes through the bottoms of the two lower guide wheels and then extends upward out of the top wall of the sedimentation tank and is wound on the drum. The scraper plate is provided with an upper guide slide cylinder, and a steel wire rope located between the two upper guide wheels passes through the upper guide slide cylinder. The lower portion of the scraper plate is fixedly connected to the steel wire rope located between the two lower guide wheels.

5. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 3 is characterized by: The scraper plate is tiltedly arranged in the sediment trough, and the lower part of the scraper plate is provided with an opening, and a one-way door is hinged at the opening. The one-way door is opened by resistance when the scraper plate returns.

6. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 3 is characterized by: The adjustable water outlet is vertically arranged on the side wall between the sedimentation tank and the water outlet tank, the bottom of the adjustable water outlet is higher than the slag discharge port and the top is lower than the first water inlet; an adjusting structure for adjusting the water outlet height of the adjustable water outlet is provided in the water outlet tank.

7. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 6 is characterized by: The adjustment structure includes guide rails vertically arranged on both sides of the adjustable water outlet and a partition for blocking the adjustable water outlet. The two guide rails are arranged relative to each other to form a limiting slide groove that cooperates with the partition. The partition is slidably installed in the limiting slide groove. The top of the partition has an arc-shaped groove with the center located above. When the partition is at the highest point, its arc-shaped groove and the top of the adjustable water outlet form an overflow hole.

8. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 7 is characterized by: A lifting chain is provided on the top of the partition, and a traction rope driven by a winch is provided on the top of the water outlet pool, and the traction rope is connected to the lifting chain.

9. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 1 is characterized by: The outlet of the confluence main is connected to the two branches via a three-way joint, and each branch is provided with a solenoid valve; or the outlet of the confluence main is connected to the two branches via a two-position three-way solenoid valve.

10. The bridge runoff collection and treatment system for water environment sensitive areas according to claim 1 is characterized by: A slope buffer platform is provided on the bottom wall of the water outlet pool below the adjustable water outlet.

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