Road surface water filtering and draining system for water-source-crossing expressway

Abstract

The utility model discloses a road surface water filtering and draining system for a water-source-crossing expressway, which is used for solving the damage of pollutants in road surface water to a water-source reservoir. Water collecting grooves are formed in emergency lanes on the two sides of a viaduct of a wading road section, sewage filtering boxes are installed at the positions, located at the two ends of a bridge head and below a bridge floor, of reservoir slopes, the sewage filtering boxes and the water collecting grooves are connected through downpipes, and adsorption materials are arranged in the sewage filtering boxes. And holes are drilled in the water collecting tank every dozens of meters, gravity mechanical valves are installed, and the gravity mechanical valves have the opening state and the closing state. According to the utility model, different drainage modes can be automatically selected according to the amount of precipitation, a trace amount of rainwater with higher pollutant content can be effectively filtered, the pollution to rivers and reservoirs is avoided, and the environment-friendly drainage device has the characteristic of environmental protection.

Description

Technical Field

[0001] The utility model belongs to the highway surface water drainage system. Background Art

[0002] The construction mileage of highways is getting longer and longer, especially when crossing mountains and reservoirs.

[0003] When crossing a reservoir, an elevated road surface needs to be built. At present, the drainage method for this section is to directly use drain pipes for direct drainage on both sides of the road surface.

[0004] This method has serious environmental problems and problems of untimely drainage.

[0005] Regarding environmental problems, there will be oil stains, chemical raw material pollution, solid particulate pollution, and snow melting agents on the road surface. When it rains, these pollutants will enter the reservoir of the water source along with the rainwater, causing water pollution. At present, the method is to minimize the occurrence of accidents from a management perspective. For example, speed limits are imposed on highways in the water source area, but these management measures still cannot fundamentally solve the above problems.

[0006] The purpose of the utility model is to fundamentally solve the harm caused by pollutants to the reservoir of the water source in the above problems. Content of the Utility Model

[0007] In order to solve the deficiencies of the prior art, the utility model provides a drainage system with safety, effectiveness, and the ability to drain water according to different rainfall amounts on the road surface.

[0008] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0009] A surface water filtration and drainage system for highways crossing water sources, characterized in that water collecting troughs are arranged on the emergency lanes on both sides of the viaduct in the water-crossing section, and sewage filtration boxes are installed at both ends of the bridgehead and on the reservoir slopes below the bridge deck. The sewage filtration boxes are connected to the water collecting troughs through downpipes, and adsorption materials are arranged in the sewage filtration boxes; and, gravity mechanical valves are drilled and installed every dozens of meters in the water collecting troughs, and the gravity mechanical valves have two states: open and closed.

[0010] The gravity mechanical valve includes a valve body, a valve plate, and an operating handle. The valve body is fixed on the bridge body through a valve seat and expansion bolts. The valve plate is a circular stainless steel thin plate, which is installed in the valve body through a rotating shaft. The rotating shaft is fixedly connected to the operating handle, and there is a 45-degree angle between the operating handle and the valve body. A foamed polyurethane rod is fixedly installed at the top of the operating handle. When the water level in the water collecting trough is greater than a predetermined height, the foamed polyurethane rod floats. On the contrary, when the water level in the water collecting trough is less than the predetermined height, the foamed polyurethane rod drops, and the valve plate seals the valve opening of the valve body.

[0011] Further, a siphon is provided below the gravity mechanical valve.

[0012] Further, an adsorption material for adsorbing oil stains is provided inside the sewage filtration tank.

[0013] Further, the adsorption material is one or a combination of several of activated carbon adsorption material, expanded graphite adsorption material, PP filter cotton, wool felt polyurethane adsorbent or polystyrene adsorbent.

[0014] A highway surface water filtration and drainage system spanning a water source area is characterized in that water collection troughs are provided on the emergency lanes on both sides of the viaduct in the wading section, and sewage filtration tanks are installed at the reservoir slopes below the bridge deck at both ends of the bridgehead. The sewage filtration tank is connected to the water collection trough through a downpipe, and an adsorption material is provided inside the sewage filtration tank; and, overflow valves are drilled and installed at intervals of dozens of meters in the water collection trough, and there is a height difference between the top of the overflow valve and the bottom surface of the water collection trough.

[0015] Further, the overflow valve includes a valve body and a valve plate. The valve plate is a stainless steel thin plate and is installed in the valve body through a rotating shaft. The upper end surface of the valve body is higher than the bottom of the water collection trough, and a siphon is installed at the lower end of the valve body.

[0016] Further, an adsorption material for adsorbing oil stains is provided inside the sewage filtration tank.

[0017] Further, the adsorption material is one or a combination of several of activated carbon adsorption material, expanded graphite adsorption material, PP filter cotton, wool felt polyurethane adsorbent or polystyrene adsorbent.

[0018] The beneficial effects of the present utility model are:

[0019] The utility model realizes automatically selecting different drainage modes according to the amount of precipitation, and effectively filters the rainwater with relatively high pollutants in trace amounts, avoiding the pollution of rivers and reservoirs, and has the characteristics of environmental protection. Description of the Drawings

[0020] Figure 1 It is a vertical view of the present utility model.

[0021] Figure 2 It is a horizontal view of the water collection trough.

[0022] Figure 3 It is an arrangement diagram of the present utility model.

[0023] Figure 4 It is a top view of the gravity mechanical valve.

[0024] Figure 5 It is an elevation view of the gravity mechanical valve.

[0025] Figure 6 This is a structural diagram of the second embodiment.

[0026] In the figure:

[0027] 10 water collection tanks,

[0028] 20 gravity mechanical valve, 21 valve body, 22 valve plate, 23 operating handle, 24 foamed polyurethane rod,

[0029] 30 sewage filter box,

[0030] 40 siphon,

[0031] 50 relief valve,

[0032] 00 bridge deck. DETAILED DESCRIPTION

[0033] The main body of the utility model is an elevated expressway, which comprises, from the middle to both sides, a middle line, a driving lane, an emergency lane and guardrails, wherein the guardrails are enclosure-type concrete guardrails.

[0034] A drainage structure is provided on the emergency lane near the guardrail.

[0035] Embodiment 1

[0036] refer to Figures 1 to 3 , the construction method of the drainage structure is as follows:

[0037] A water collection trough 10 with a depth of not less than 3 cm is reserved near the guardrail of the emergency lane. The water collection trough is set on both sides of the bridge deck 00. The width and depth of the water collection trough are preferably 30 cm. The highway bridge deck has a slope when it is laid. This slope design (for example, a slope of 3 degrees) is conducive to avoiding water accumulation on the road and is conducive to the rapid drainage of rainwater. Circular holes are drilled in the water collection trough 10 at intervals of tens of meters, and the diameter of the circular holes is preferably 15 cm.

[0038] A gravity mechanical valve 20 is installed at the circular hole. The gravity mechanical valve has two states: closed and open. When the gravity mechanical valve is in the open state, rainwater can be discharged through the mechanical valve. When the mechanical valve is in the closed state, the flowing water passes through the sump and collects in the sewage filter boxes at the bridgeheads at both ends of the bridge.

[0039] At the reservoir slopes at both ends of the bridgehead, a sewage filtration tank 30 is installed. The sewage filtration tank has a large volume, and adsorption materials are arranged inside the sewage filtration tank. The adsorption materials at least include monomer materials and composite materials for adsorbing oil stains, such as activated carbon adsorption materials, expanded graphite adsorption materials, polyurethane adsorbents, polystyrene adsorbents, etc. A large amount of these are filled in the sewage filtration tank to adsorb the sewage that may contain oil stains washed down by the initial scouring of the bridge deck rainwater. Filter materials such as PP filter cotton and wool felt can also be contained in the sewage filtration tank.

[0040] The main pollutants existing on the bridge deck are the oil stains dripped by vehicles. Therefore, this sewage filtration tank mainly treats oil stains.

[0041] It is easy to understand that for particulate and solid dirt, it will be intercepted and captured by the filter materials inside the sewage filtration tank.

[0042] The above-mentioned sewage filtration tank 30 is installed at the slopes of reservoirs, ponds, and rivers below the bridge deck. The sewage can be collected relying on gravitational potential energy without the need for power such as water pumps, which is crucial in the wild environment.

[0043] Reference Figure 4 and Figure 5 , the gravity mechanical valve 20, includes a valve body 21, a valve plate 22, and an operating handle 23. The valve body is cylindrical. The valve body 21 is fixed to the bridge body through a valve seat and expansion bolts. The valve plate 22 is a circular stainless steel thin plate. The valve plate is installed inside the valve body through a rotating shaft, and the valve plate has two states of opening and closing relative to the valve body. A pair of operating handles 23 are fixedly connected to the rotating shaft. The operating handle forms a 45-degree angle with the above-mentioned valve body. A foamed polyurethane rod 24 is fixedly installed at the top of the operating handle. When the water level in the water collecting tank is greater than the predetermined height, the foamed polyurethane rod floats up, and then drives the valve plate to reverse a certain angle through the operating handle and falls into the overflow channel between the valve body and the valve plate, directly discharging the rainwater into the reservoir. On the contrary, when the water level in the water collecting tank is less than the predetermined height, the foamed polyurethane rod 24 drops, and the valve plate seals the valve orifice of the valve body. Through this gravity mechanical valve, the purpose of automatically opening and closing the valve plate according to the water level in the water collecting tank is achieved, that is, when the rain is heavy, the valve body is automatically opened, and when the rain is light, the valve body is automatically closed.

[0044] Furthermore, a siphon 40 is arranged below the gravity mechanical valve 20. The lower end of the siphon is connected through a hose and directly inserted below the lake surface under the bridge.

[0045] In the rainy season, this drainage system automatically selects different modes for drainage according to the amount of rainfall:

[0046] During the light rain stage, the accumulated water on the road surface is drained out through the catch basin. Since the rain is light, the water in the catch basin slowly converges and flows into the sewage filter box (the oil stains on the road surface are mainly washed away during the light rain stage). During this stage, due to the small water flow in the catch basin, the gravity mechanical method is in a closed state.

[0047] During the heavy rain or rainstorm stage, a large amount of water accumulates on the road surface. At this time, a large amount of rainwater converges in the catch basin. When the water in the catch basin exceeds the preset water level or is full, the gravity mechanical valve automatically opens. Most of the water is directly discharged to the reservoir through the siphon pipe, and a small amount of rainwater enters the sewage filter box. Since the lower end of the siphon pipe is directly connected to the lake surface through a hose, the rainwater forms a siphon principle and drains quickly, improving the drainage speed. During this stage, the siphon device plays a major role in drainage.

[0048] The filter materials in the sewage filter box need to be replaced regularly, usually once before the rainy season of each natural year.

[0049] Embodiment 2

[0050] Reference Figure 6 , different from Embodiment 1, in this embodiment, the gravity mechanical valve is replaced with an overflow valve 50. Specifically, the overflow valve includes a valve body and a valve plate. The valve plate is a stainless steel thin plate and is installed in the valve body through a rotating shaft. When installed, the upper end face of the valve body is higher than the bottom of the catch basin, forming a height difference between the top of the valve body and the bottom surface of the catch basin. Similarly, the lower end of the valve body is installed with a siphon pipe.

[0051] During the light rain stage, the accumulated rainwater in the catch basin does not submerge the top of the valve body, and the water on the road surface is drained out through the space between the catch basin and the valve body. Since the rain is light, the water in the catch basin slowly converges and flows into the sewage filter box (the oil stains on the road surface are mainly washed away during the light rain stage). During this stage, due to the small water flow in the catch basin, the water flow will not overflow the overflow valve.

[0052] During the heavy rain or rainstorm stage, a large amount of water accumulates on the road surface. At this time, a large amount of rainwater quickly converges in the catch basin. When the water in the catch basin exceeds the top inside the catch basin, the rainwater quickly discharges directly to the reservoir through the siphon pipe at the lower end. Since the lower end of the siphon pipe is directly connected to the lake surface through a hose, the rainwater forms a siphon principle and drains quickly, improving the drainage speed. During this stage, the siphon device plays a major role in drainage.

[0053] The sundries such as leaves in the above-mentioned catch basin need to be cleaned regularly, usually once every quarter.

[0054] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those skilled in the relevant art to the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A highway road surface water filtration and drainage system spanning a water source area, characterized in that, A water collecting trough is arranged on the emergency lanes on both sides of the viaduct in the wading section, and a sewage filtering box is installed at the slopes of the reservoir below the bridge deck at both ends of the bridge head. The sewage filtering box is connected to the water collecting trough through a downcomer, and an adsorption material is arranged in the sewage filtering box; and, gravity mechanical valves are drilled and installed every dozens of meters in the water collecting trough, and the gravity mechanical valves have two states of opening and closing.

2. The surface water filtering and drainage system for expressways crossing water sources according to claim 1, characterized in that, The gravity mechanical valve comprises a valve body, a valve plate and an operating handle. The valve body is fixed on the bridge body through a valve seat and an expansion bolt. The valve plate is a circular stainless steel thin plate, which is installed in the valve body through a rotating shaft. The rotating shaft is fixedly connected to the operating handle, and an included angle of 45 degrees exists between the operating handle and the valve body. A foamed polyurethane rod is fixedly installed at the top of the operating handle. When the water level in the water collecting trough is greater than a predetermined height, the foamed polyurethane rod floats up. On the contrary, when the water level in the water collecting trough is less than the predetermined height, the foamed polyurethane rod drops, and the valve plate seals the valve orifice of the valve body.

3. The surface water filtering and drainage system for an expressway crossing a water source area according to claim 1, characterized in that, A siphon is arranged below the gravity mechanical valve.

4. A highway surface water filtration and drainage system that crosses a water source area, characterized in that, A water collecting trough is arranged on the emergency lanes on both sides of the viaduct in the wading section, and a sewage filtering box is installed at the slopes of the reservoir below the bridge deck at both ends of the bridge head. The sewage filtering box is connected to the water collecting trough through a downcomer, and an adsorption material is arranged in the sewage filtering box; and, overflow valves are drilled and installed every dozens of meters in the water collecting trough, and there is a height difference between the top of the overflow valve and the bottom surface of the water collecting trough.

5. A highway surface water filtration and drainage system for crossing a water source area according to claim 4, characterized in that, The overflow valve comprises a valve body and a valve plate. The valve plate is a stainless steel thin plate and is installed in the valve body through a rotating shaft. The upper end surface of the valve body is higher than the bottom of the water collecting trough, and a siphon is installed at the lower end of the valve body.

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