Method for collecting and treating bridge floor runoff in water environment sensitive area

Abstract

The invention discloses a method for collecting and processing bridge floor runoff in a water environment sensitive area, and the method comprises the steps: transmitting the information of vehicles passing through a bridge floor to a control system through a detection shooting part, and transmitting an alarm signal to an audible and visual alarm through the control system when the vehicles stop for a certain time, so as to remind the stopped vehicles to drive away; when the alarm reminds that the vehicle is not driven away after a certain time, the vehicle accident is judged; the water quality monitoring unit acquires a signal of liquid in the main confluence pipe and transmits the signal to the control system, the control system analyzes the liquid, and when the liquid is rainwater, the main confluence pipe is switched to be communicated with the sedimentation tank, so that the rainwater enters the sedimentation tank; when the liquid is the accident liquid or the mixed liquid of the accident liquid and rainwater, the confluence main pipe is communicated with the accident emergency pool, so that the liquid enters the accident emergency pool. According to the invention, classified treatment of rainwater and accident wastewater on bridge floor runoff can be realized, the water yield can be adjusted in real time according to the rainfall, the precipitation treatment effect on rainwater is improved, rainwater sediment can be automatically discharged, and sludge deposition is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of road runoff treatment in water environment sensitive areas, and in particular to a method for collecting and treating bridge deck runoff in water environment sensitive areas. Background Art

[0002] In the existing construction, some bridge projects inevitably cross key water environment sensitive areas (such as drinking water source protection areas and aquatic biological protection areas). For these bridge projects, once a hazardous chemical transport vehicle passes through the bridge section and causes hazardous chemicals to leak due to a traffic accident, the hazardous chemicals are very likely to enter the sensitive water body under the bridge, which will cause serious pollution to sensitive areas such as residents' drinking water and aquatic ecosystems, and it is difficult to deal with them later. Therefore, relevant specifications require that for water environment sensitive sections, the requirements for protecting water bodies should be highlighted to avoid water pollution due to improper drainage. However, most bridge projects did not consider the impact of the operation of hazardous chemical transport vehicles on water environment sensitive sections during design and construction, and did not coordinate the design of bridge runoff collection and accident emergency sedimentation tanks, so that the existing facilities could not meet the requirements of bridge runoff collection and accident emergency pools at the same time, and effective protective measures could not be taken in time after the accident, so that the impact of the pollution accident continued to expand, and the purpose of water body protection for key water environment sensitive sections could not be achieved. Summary of the invention

[0003] In view of this, the present invention proposes a method for collecting and treating bridge deck runoff in water environment sensitive areas.

[0004] To achieve the above object, the present invention adopts the following technical solutions: The method for collecting and treating runoff on bridge decks in water environment sensitive areas of the present invention adopts a system for collecting and treating runoff on bridge decks in water environment sensitive areas, wherein the system comprises a runoff collecting unit, a treating unit and a monitoring system, wherein the runoff collecting unit comprises a confluence main pipe and a collecting pipe connected to each drain outlet on the bridge deck; the treating unit comprises a sedimentation tank, an accident emergency tank and a water outlet tank, wherein the sedimentation tank and the water outlet tank are interconnected; the outlet of the confluence main pipe is divided into two branches, wherein one branch is connected to the sedimentation tank and the other branch is connected to the accident emergency tank; The sedimentation tank has a first water inlet, a slag discharge port and a vertically opened adjustable water outlet, wherein 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, and 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 dangerous 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 end 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 dangerous gas alarm; The method specifically includes the following contents: the detection camera transmits the information of vehicles passing through the bridge deck to the control system; when the vehicle is stuck for more than a certain time, the control system sends an alarm signal to the sound and light alarm, and the sound and light alarm warns the stuck vehicle to leave; when 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 warns the 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 mixture enter the confluence main through the drain port and the collection pipe, the water quality monitoring unit obtains the liquid signal in the confluence main and transmits it to the control system, the control system analyzes the liquid signal, and when the liquid is rainwater, the confluence main is switched to a state connected to the sedimentation tank, so that the rainwater enters the sedimentation tank through the first water inlet, enters the outlet tank through the regulated outlet after sedimentation, and is finally discharged to the external environment through the drain port of the outlet tank; when the liquid is the accident liquid or its mixture with rainwater, the confluence main is connected to the accident emergency tank, so that the liquid in the confluence main directly enters the accident emergency tank, and when the liquid volume exceeds the set volume of the accident emergency tank, the liquid overflows from the accident emergency tank into the sedimentation tank.

[0005] 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 comprises an upper buffer plate and a lower buffer plate both with 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. 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 small bottom and a large top; The slag cleaning mechanism includes a scraper plate with a structure consistent with the slag trough and a traction mechanism for driving the scraper plate to move along the slag trough. The traction mechanism includes a power source arranged on 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.

[0006] 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 around 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.

[0007] Preferably, the scraper plate is tiltedly arranged in the slag 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.

[0008] 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 arranged in the water outlet tank.

[0009] 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 groove cooperating with the partition, the partition is slidably installed in the limiting slide groove, the top of the partition has an arc groove with the center located above, and when the partition is at the highest point, its arc groove and the top of the adjustable water outlet form an overflow hole.

[0010] 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.

[0011] Preferably, the outlet of the confluence main pipe 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 pipe is connected to the two branches via a two-position three-way solenoid valve.

[0012] Preferably, a sloped buffer platform is provided on the bottom wall of the water outlet pool below the adjustable water outlet, which can mitigate 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.

[0013] The present invention solves the problems that the current bridge runoff collection system cannot identify bridge accident wastewater, emergency treatment measures are not in place, the collection system cannot classify and process, and there is a lack of intelligent operation. The present invention can realize the classification and treatment of rainwater and accident wastewater on the bridge runoff, and can adjust the water output in real time according to the amount of rainfall, increase the precipitation treatment effect of rainwater, and automatically discharge the sediment of rainwater by mechanical means to avoid mud sedimentation and ensure the sedimentation effect of the sedimentation tank. The present invention monitors and identifies the bridge accident site, rainfall, water quality in the pipeline, rainwater and accident wastewater in the tank in real time through the monitoring system, ensuring that rainwater and accident wastewater can be classified, collected and discharged under the correct operation procedure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the bridge surface runoff collection and treatment system in the water environment sensitive area of ​​the present invention.

[0015] Figure 2 It is a top view of the processing unit of the present invention.

[0016] Figure 3 It is a top view of the sedimentation tank described in the present invention.

[0017] Figure 4 yes Figure 3 AA direction schematic diagram.

[0018] Figure 5 yes Figure 4 BB direction schematic diagram.

[0019] Figure 6 It is a schematic diagram of the slag cleaning mechanism.

[0020] Figure 7 It is a structural schematic diagram of a scraper plate.

[0021] Figure 8 It is a side view of the scraper plate.

[0022] Fig. 9 This is a schematic diagram of the outlet pool.

[0023] Fig.10 It is a top view of the adjustment structure.

[0024] Fig.11 It is a schematic diagram of the assembly of partitions and guide rails.

[0025] Fig.12 It is a diagram showing the relative positions of the regulating structure and the regulating outlet.

[0026] Fig.13 This is the elevation view of the accident emergency pool.

[0027] Fig.14 This is a top view of the accident emergency pool. DETAILED DESCRIPTION

[0028] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0029] It should be noted that, in the description of the present invention, 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.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1-14 As shown, the method for collecting and treating runoff on bridge decks in water environment sensitive areas of the present invention adopts a system for collecting and treating runoff on bridge decks in water environment sensitive areas, which includes a runoff collecting unit, a treating unit and a monitoring system. The runoff collecting unit has a confluence main pipe 1.1 and a collecting pipe 1.3 connected to each drain port 1.2 on the bridge deck. The width direction of the bridge deck usually has a certain slope from the center of the road to both sides. The drain ports 1.2 are arranged side by side on both sides of the bridge deck, which is conducive to runoff collection. 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. 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 pipe 1.1 is divided into two routes, one of which is connected to the sedimentation tank 2, and the other is connected to the accident emergency tank 3. During the actual installation, the outlet of the confluence main pipe 1.1 is connected to the two branches through a three-way joint. Each branch is provided with an electromagnetic valve, and the two branches and the confluence main pipe 1.1 can be freely switched by controlling the two electromagnetic valves. Of course, the outlet of the confluence main pipe 1.1 can also be connected to the two branches through a two-position three-way electromagnetic valve, and the two branches and the confluence main pipe 1.1 can be freely switched by controlling the two-position three-way electromagnetic 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 liquid that converges together automatically flows 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, so as to achieve classified treatment. The sedimentation tank 2 is a rectangular parallelepiped structure, which has 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 relatively opened on a pair of side walls of the sedimentation tank 2, the slag discharge port 2.2 is located at the lower part of the sedimentation tank 2, and the adjustable water outlet 2.3 is opened on a long side wall 2.6 close to the slag discharge port 2.2 and is connected to the water outlet tank 4; for the convenience of description, the present invention records the side wall corresponding to the first water inlet 2.1 as the water inlet side wall 2.4, the side wall 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 and the sedimentation tank 2 are arranged adjacent to each other, and the bottom of one of the side walls has a drain port a with a first valve, which can directly discharge the clear rainwater after precipitation; 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 by a connecting pipe). The height of the overflow port 3.2 is lower than the second water inlet 3.1, and 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 leakage liquid can be discharged into the receiving container through the waste outlet 3.3, so as to facilitate the receiving unit to process the collected accident leakage liquid and avoid environmental pollution as much as possible; in addition, the accident emergency pool 3 of the present invention is set according to the volume of large hazardous chemicals. When encountering rainy weather + accidents, the runoff is often relatively large, and the liquid in the accident emergency pool 3 enters the sedimentation tank 2 through the overflow port 3.2 to increase the holding volume; The monitoring system includes a tower 8.1, a detection camera 8.2, a rainfall monitoring device and an audible and visual alarm 8.5 arranged on the tower 8.1, and also includes a water quality monitoring unit 8.3 arranged on the confluence main 1.1 and a dangerous gas alarm arranged on the accident emergency pool 3. The signal output ends 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 input end of the control system, and the alarm signal output end of the control system is respectively connected to the alarm signal input end of the audible and visual alarm 8.5 and the dangerous gas alarm 8.6; a solar energy storage system can also be installed on the tower 8.1 to convert solar energy into electrical energy. Provide energy for the electrical components (such as the detection camera and the rain gauge) of the present invention. To ensure the normal operation of the present invention, the present invention is connected to the municipal power grid to ensure the source of electrical energy; a wireless network receiver and transmitter is arranged on the top of the tower 8.1, and the control system is connected to the host computer through the wireless network receiver and transmitter, so as to realize 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. When 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 give a sound and light reminder, driving the vehicle to leave as soon as possible, thereby reducing traffic accidents caused by long-term vehicle stagnation. The control system can be incorporated into the traffic management system. When a vehicle has not left after a certain period of time, it is determined that the vehicle has an accident. The traffic management department can further handle it according to the accident reminder to reduce traffic accidents as much as possible. 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, and 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.

[0032] Combination Figure 1 It can be seen that a water inlet buffer structure is provided in the sedimentation tank 2. 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, and includes an upper buffer plate 5.1 and a lower buffer plate 5.2, both of which are provided with water permeable holes. The upper buffer plate 5.1 and the lower buffer plate 5.2 are inclined in opposite directions. 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. Both the upper buffer plate 5.1 and the lower buffer plate 5.2 are provided with stainless steel mesh plates for buffering 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 effluent water quality.

[0033] Combination Figure 3-5It can be seen that a trapezoidal sedimentation tank 2.7 is provided at the bottom of the sedimentation tank 2. The sedimentation tank 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 tank 2.7 is also provided in the sedimentation tank 2. Figure 6-8 It can be known that the slag cleaning mechanism includes a scraper plate 6.1 with the same structure as the slag trough 2.7 and a traction mechanism that drives the scraper plate 6.1 to move along the slag trough 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 present invention has two drums, and the corresponding pulley guide assemblies are two and are respectively installed on the water inlet side wall and the slag outlet side wall of the sedimentation tank 2. The drums and pulley guide assemblies are matched one by one. Take one of the sets 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 downward, and is first passed through The upper guide wheel 6.2 on the left is bypassed at the bottom, and then bypassed from the top of the upper guide wheel 6.2 on the right, and the upper guide wheel 6.2 is used to redirect it, and then bypassed from the bottom of the two lower guide wheels 6.3 at the bottom, and then passed through the top wall of the sedimentation tank 2 and wound on the drum, wherein the upper guide slide 6.4 for the wire rope 6.5 to pass through is provided at the upper part, and the lower part is fixedly connected to the wire rope 6.5 (the lower part of the scraper plate 6.1 is fixedly connected to the wire rope 6.5 located between the two lower guide wheels 6.3). In the present invention, the lower part of the scraper plate 6.1 is connected to the two wire ropes, and the two upper guide slides 6.4 have a guiding function, which effectively ensures the stable movement of the scraper plate 6.1 and the slag cleaning effect.

[0034] Combination 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, so that the sediment that has not been scraped off can pass through the scraper plate 6.1 smoothly, avoiding the accumulation of mud on the rear side of the scraper plate 6.1.

[0035] During actual installation, each reel is equipped with a power source, which includes a motor and a reducer driven by the motor. The reel of the reel is connected to the output shaft of the reducer to ensure that the scraper plate 6.1 is balanced in force.

[0036] Combination 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 thereof is lower than the first water inlet 2.1; a slope buffer platform F is arranged 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 arranged in the water outlet tank 4, and the adjusting structure includes the guide rails 7.3 vertically arranged on both sides of the adjustable water outlet 2.3 and the guide rails 7.3 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 matched 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 overlap, and the water outlet height of the adjustable water outlet 2.3 can be adjusted by adjusting the height of the partition 7.1.

[0037] Combination Fig.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 water outlet pool 4, and the traction rope is connected to the lifting chain. In actual work, the partition 7.1 is driven up by the winch, and can be lowered by its own weight to adjust the height of the partition 7.1. In actual installation, the partition 7.1 is made of 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 water outlet pool 4 are sealed and connected, and the lower part of the guide rail 7.3 passes through the bottom wall of the water outlet pool 4 downward, providing sufficient space for the partition 7.1 to move up and down, and the guide rail 7.3 and the bottom wall of the water outlet pool 4 are sealed and connected to avoid water leakage.

[0038] In actual construction, the main structures of the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3 can be constructed with concrete, fiberglass and other corrosion-resistant, sealed and wear-resistant materials according to actual conditions; the pool covers of the sedimentation tank 2, the outlet tank 4, and the accident emergency tank 3 are all made of stainless steel covers to prevent debris from falling into 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 body; 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 body, the accident emergency tank 3 monitors the concentration of dangerous gases in the tank body and transmits it to the control system. When the concentration of dangerous gases exceeds the standard, the exhaust fan is used to discharge the dangerous gases in the tank body.

[0039] During actual installation, the water quality monitoring unit of the present invention 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 deck runoff is rainwater, chemical liquid or a mixture of rainwater and chemical liquid, etc., and can perform diversion treatment based on these new types.

[0040] The control system F of the present invention is installed on a tower pole or on a bridge. The method of the present invention uses a detection camera 8.2 to transmit the information of vehicles passing through the bridge deck to the control system. When the vehicle is stagnant for more than a certain period of time, the control system sends an alarm signal to the sound and light alarm 8.5, and the sound and light alarm 8.5 alarms to remind the stagnant vehicle to leave; when the vehicle does not leave after a certain period of alarm reminder, it is determined that the vehicle is in an accident, and the sound and light alarm 8.5 alarms to remind 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 pool is in a normally open state; the leaked accident liquid, rainwater and their mixed liquid enter the confluence main through the drain port and the collection pipe. The confluence pipe 1.1, the water quality monitoring unit obtains the liquid signal in the confluence pipe 1.1 and transmits it to the control system, the control system analyzes the liquid signal, and when the liquid is rainwater, the confluence pipe is switched 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 water 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 pipe 1.1 is connected to the accident emergency tank 3, so that the liquid in the confluence 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 to the sedimentation tank 2. Specifically, the method of the present invention has four working scenarios, which are no rain and no accident, no rain and accident, rain and no accident, and rain and accident: 1. In the rainless and accident-free mode, the sedimentation tank 2 and the confluence main are in a normally closed state, the emergency tank 3 and the confluence main are in a normally open state, and the partition 7.1 at the adjustable water outlet 2.3 is in the highest position to deal with emergencies. When an emergency occurs, the accident liquid flows directly into the accident emergency tank 3. If the amount of accident liquid is large, it will be discharged into the sedimentation tank 2 through the overflow port 3.2 of the accident emergency tank 3, increasing the volume of accident liquid collection.

[0041] 2. When the water quality monitoring unit detects that the liquid in the confluence main pipe 1.1 is an accident liquid, the no-rain but accident scenario mode is activated. In the no-rain but accident scenario mode, the control system first controls the sound and light alarm to alert passing vehicles to slow down and avoid; the accident liquid flows into the accident emergency pool 3 after passing through the collection pipe 1.3 and the confluence main pipe 1.1. In actual projects, the control system can be incorporated into the traffic pipe network system. When a vehicle is determined to have an accident, the traffic management personnel can remotely control and promptly direct the on-site personnel to take correct protection or precautionary measures, thereby increasing the efficiency of emergency handling at the accident site and reducing the impact of the accident. 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 gathered in the accident emergency pool 3. In the later treatment, the second valve is 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; 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 pool 2 through the overflow port 3.2. When the sedimentation pool 2 is full, it overflows to the outlet pool 4 to increase the accident liquid collection volume; when the accident liquid is completely collected, the accident liquid in the accident emergency pool 3, the sedimentation pool 2 and the outlet pool 4 should be handed over to a unit with relevant qualifications for treatment as soon as possible, so as to be used in rainy weather; 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 inspection door and enter the accident emergency pool 3 for cleaning operations in preparation for the next use.

[0042] 3. When the rainfall 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 pipe 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 pipe 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 stay 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; When the rainfall is heavy, the baffle 7.1 is at the highest position (maintained at the highest position), and when the water level in the sedimentation tank 2 rises to the highest water level, it overflows into the outlet tank 4 through the overflow hole and is discharged from the outlet a of the outlet tank 4; when the rain stops, the rainwater in the sedimentation tank 2 is retained in the sedimentation tank 2 for a period of time, and the larger suspended particles will sink into the sedimentation tank 2.7. After settling for a period of time, the height of the slidable baffle 7.1 of the adjustable water inlet of the outlet tank 4 is continuously adjusted downward, so that the clearer rainwater in the upper layer of the sedimentation tank 2 slowly overflows into the outlet tank 4, and then flows to the external environment through the outlet a of the outlet tank 4 until the water in the sedimentation tank 2 is discharged to the lowest water level; then the sludge in the sedimentation tank is cleared out by the sludge cleaning mechanism. During cleaning, the motor drives the two reels to move synchronously, so that the scraper plate 6.1 moves from the water inlet side wall 2.4 to the sludge discharge side wall, and pushes the sludge deposited in the sludge tank 2.7 out of the sedimentation tank 2 to achieve sludge cleaning.

[0043] 4. When the rainfall 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 warn 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 outlet 2.3 in 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 water level, the control system controls the winch. The machine works in the reverse direction, so that the adjustable water outlet 2.3 is at the highest position and the drain outlet a of the outlet pool 4 is closed. The accident emergency pool 3, the sedimentation tank 2 and the outlet pool 4 are connected to provide sufficient accommodation space for the mixed rainwater and accident liquid; when the wastewater in the accident emergency pool 3, the sedimentation tank 2 and the outlet pool 4 reaches the maximum capacity and the water quality still contains a large amount of accident liquid, each valve of the confluence main 1.1 is closed to make the remaining rainwater and the mixed accident liquid flow along the longitudinal direction of the bridge deck on both sides of the bridge deck, and then flow into the two banks, avoiding as much as possible from flowing into the sensitive river section water body to cause water pollution accidents.

[0044] 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 treatment as soon as possible. After the three pools are emptied, clean the pools. Before cleaning, determine whether there is dangerous gas in the pool. Specifically: the dangerous gas alarm transmits the signal to the control system, and the control system analyzes the received signal. When the gas in the accident emergency pool 3 is a dangerous gas, the dangerous gas alarm alarms and runs the exhaust fan to exhaust. Only when there is no alarm information can the control system be operated to open the inspection door and enter the accident emergency pool 3 for cleaning operations in preparation for the next use.

[0045] The present invention solves the problems that the current bridge runoff collection system cannot identify bridge accident wastewater, emergency treatment measures are not in place, the collection system cannot classify and process, and there is a lack of intelligent operation. The present invention can realize the classification and treatment of rainwater and accident wastewater on the bridge runoff, and can adjust the water output in real time according to the amount of rainfall, increase the precipitation treatment effect of rainwater, and automatically discharge the sediment of rainwater by mechanical means to avoid mud sedimentation and ensure the sedimentation effect of the sedimentation tank. The present invention monitors and identifies the bridge accident site, rainfall, water quality in the pipeline, rainwater and accident wastewater in the tank in real time through the monitoring system, ensuring that rainwater and accident wastewater can be classified, collected and discharged under the correct operation procedure.

[0046] Finally, it should be emphasized that the above is only 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 recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for collecting and treating runoff on bridge decks in water environment sensitive areas, the method adopts a system for collecting and treating runoff on bridge decks in water environment sensitive areas, the system for collecting and treating runoff on bridge decks in water environment sensitive areas comprises a runoff collection unit, a treatment unit and a monitoring system, and is characterized in that: The runoff collection unit has a confluence main pipe and a collection pipe connected to each drain outlet on the bridge deck; the treatment unit includes a sedimentation tank, an accident emergency tank and a water outlet tank, and the sedimentation tank and the water outlet tank are interconnected; the outlet of the confluence main pipe is divided into two branches, one branch is connected to the sedimentation tank, and the other branch is connected to the accident emergency tank; The sedimentation tank has a first water inlet, a slag discharge port and a vertically opened adjustable water outlet, wherein 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, and 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 dangerous 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 end 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 dangerous gas alarm; The method specifically includes the following contents: the detection camera transmits the information of vehicles passing through the bridge deck to the control system; when the vehicle is stuck for more than a certain time, the control system sends an alarm signal to the sound and light alarm, and the sound and light alarm warns the stuck vehicle to leave; when 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 warns the 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 mixture enter the confluence main through the drain port and the collection pipe, the water quality monitoring unit obtains the liquid signal in the confluence main and transmits it to the control system, the control system analyzes the liquid signal, and when the liquid is rainwater, the confluence main is switched to a state connected to the sedimentation tank, so that the rainwater enters the sedimentation tank through the first water inlet, enters the outlet tank through the regulated outlet after sedimentation, and is finally discharged to the external environment through the drain port of the outlet tank; when the liquid is the accident liquid or its mixture with rainwater, the confluence main is connected to the accident emergency tank, so that the liquid in the confluence main directly enters the accident emergency tank, and when the liquid volume exceeds the set volume of the accident emergency tank, the liquid overflows from the accident emergency tank into the sedimentation tank.

2. The method for collecting and treating bridge runoff in 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, and includes an upper buffer plate and a lower buffer plate both with 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 method for collecting and treating bridge runoff in water environment sensitive areas according to claim 1 is characterized by: The sedimentation tank is provided with a sedimentation tank extending from the first water inlet to the sedimentation outlet and a slag cleaning mechanism for cleaning the sedimentation tank, wherein the sedimentation tank is a trapezoidal tank with a small bottom and a large top; The slag cleaning mechanism includes a scraper plate with a structure consistent with the slag trough and a traction mechanism for driving the scraper plate to move along the slag trough. The traction mechanism includes a power source arranged on 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 method for collecting and treating bridge runoff in 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 arranged at intervals 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 bottom 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, a steel wire rope located between two upper guide wheels passes through the upper guide slide cylinder, and the lower part of the scraper plate is fixedly connected to the steel wire rope located between the two lower guide wheels.

5. The method for collecting and treating bridge runoff in water environment sensitive areas according to claim 3 is characterized by: The scraper plate is tiltedly arranged in the sediment tank, and the lower part of the scraper plate is provided with 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.

6. The method for collecting and treating bridge runoff in 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 arranged in the water outlet tank.

7. The method for collecting and treating bridge runoff in 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 relatively arranged 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 groove with the center located above. When the partition is at the highest point, its arc groove and the top of the adjustable water outlet form an overflow hole.

8. The method for collecting and treating bridge runoff in water environment sensitive areas according to claim 6 is characterized by: A lifting chain is arranged on the top of the partition, and a traction rope driven by a winch is arranged on the top of the water outlet pool, and the traction rope is connected to the lifting chain.

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

10. The method for collecting and treating bridge runoff in water environment sensitive areas according to claim 1 is characterized by: A slope buffer platform is arranged on the bottom wall of the water outlet pool below the adjustable water outlet.

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