Road and bridge asphalt surface rainwater circulation cooling device

Abstract

The present application relates to the technical fields of road and bridge engineering maintenance, and discloses a road and bridge asphalt surface rainwater circulation cooling device, which comprises a side water tank, a central water tank and a buffer pipe, the side water tank is installed on both sides of the bridge, the central water tank is arranged in the center of the bridge, the buffer pipe is hoisted and arranged below the bridge, the hoisting height of the buffer pipe is slightly higher than the bottom of the side water tank, the installation height of the central water tank is higher than the top of the side water tank, a siphon bend is laid below the asphalt surface of the bridge, one end of the siphon bend extends into the side water tank, and the other end extends below the central water tank. The present application has the advantages compared with the prior art that it does not need external municipal water source, realizes water circulation cooling by using liquid level difference and siphon effect, does not need external power, the opening degree of the drain valve is automatically adjusted according to the asphalt pavement temperature, large flow circulation cooling is realized at high temperature, small flow or stop drainage is realized at low temperature, temperature self-adaptive control is realized, temperature control is accurate and efficient, manual water injection is not needed to start siphon, and the device can run independently all day long.

Description

Technical Field

[0001] This invention relates to the field of road and bridge engineering maintenance technology, specifically to a rainwater circulation and cooling device for asphalt surfaces on roads and bridges. Background Technology

[0002] In the high temperatures of summer, asphalt pavements on roads and bridges are affected by direct sunlight and vehicle friction, causing the surface temperature to easily exceed 60°C, and even reach 70-80°C. High temperatures can directly cause asphalt softening, rutting deformation, pavement cracking, and interlayer peeling, significantly shortening the service life of asphalt pavements and increasing road and bridge maintenance costs. At the same time, high-temperature pavements can also exacerbate the urban heat island effect, affecting driving comfort and safety.

[0003] Existing road and bridge asphalt pavement cooling technologies suffer from the following drawbacks: First, traditional water-sprinkling cooling methods rely on manual labor or water trucks, consuming huge amounts of water with extremely low water resource utilization. Furthermore, they cannot achieve continuous temperature control, and the water evaporates quickly after sprinkling, resulting in short cooling time. Frequent sprinkling can also disrupt road traffic. Second, some pre-buried pipeline cooling devices require external municipal water supply, leading to high operating costs and water waste. Most devices also require electric drive, resulting in high energy consumption and poor applicability in remote road and bridge sections. Third, existing cooling devices mostly operate at a fixed flow rate, unable to automatically adjust the cooling water volume according to the actual temperature of the asphalt pavement. Excessive drainage at low temperatures causes water loss, while insufficient cooling flow at high temperatures results in poor temperature control.

[0004] In view of the shortcomings of the existing technologies, developing a road and bridge asphalt surface cooling device that does not require external power, can collect rainwater autonomously, has adaptive temperature control, high circulation heat dissipation efficiency, and is structurally stable and easy to maintain is an urgent technical problem to be solved in this field. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing cooling methods for asphalt pavement of roads and bridges consume a lot of water, cannot maintain continuous temperature control, and lack the ability to automatically adjust the amount of cooling water according to the actual temperature of the road surface. The present invention provides a rainwater circulation cooling device for asphalt pavement of roads and bridges.

[0006] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a rainwater circulation cooling device for asphalt pavement of road and bridge, comprising side water tanks, a central water tank and a buffer pipe. The side water tanks are installed on both sides of the bridge, the central water tank is set in the center of the bridge, and the buffer pipe is suspended and set under the bridge. The suspension height of the buffer pipe is slightly higher than the bottom of the side water tanks, and the installation height of the central water tank is higher than the top of the side water tanks.

[0007] A precast concrete pipe lining is laid under the asphalt surface of the bridge. The precast concrete pipe lining has a corrugated structure, and a siphon bend is laid in its concave part. One end of the siphon bend extends into the side water tank, and the other end extends to the bottom of the central water tank. The asphalt surface of the bridge is laid on top of the precast concrete pipe lining.

[0008] A water injection pipe is installed at the bottom of the central water tank, and a four-way connector is connected to the end of the water injection pipe. The end of the siphon bend near the outside of the road extends into the side water tank, and the end of the siphon bend near the middle of the road is connected to the four-way connector. The end of the water injection pipe extends into the buffer pipe, and a drain pipe is installed at the bottom of the buffer pipe. The top of the drain pipe extends into the buffer pipe, and the height of the top of the drain pipe is higher than the height of the bottom of the water injection pipe. A balancing air guide pipe is installed at the top of the buffer pipe, with one end extending into the top of the inner side of the buffer pipe and the other end extending into the top of the inner side of the side water tank.

[0009] Furthermore, the water injection pipe is equipped with a water injection valve, and the water injection valve is equipped with a horizontally movable valve core. The central water tank is equipped with a linkage component for controlling the opening and closing of the water injection valve by buoyancy.

[0010] Furthermore, the central water tank is provided with a buoyancy component bracket on its side wall. A buoyancy rod is hinged to one side of the buoyancy component bracket, and a lever is hinged to the other side. A connecting rod is provided at the top of the buoyancy component bracket. One end of the connecting rod is hinged to the buoyancy rod, and the other end is hinged to the lever. The bottom end of the lever is connected to the valve core. A float is provided at the end of the buoyancy rod. When there is water inside the central water tank, the buoyancy causes the buoyancy rod to rotate upward, which drives the valve core to move through the connecting rod and the lever, thereby opening the water injection valve.

[0011] Furthermore, the drain pipe is equipped with a drain valve, and the drain valve contains a horizontally movable valve core. The bottom of the central water tank is equipped with a linkage assembly for controlling the opening and closing of the bridge asphalt surface temperature drain valve.

[0012] Furthermore, a gas cylinder is installed inside the precast concrete pipe lining corrugated structure, with the outlet end of the gas cylinder extending to the bottom of the central water tank, and the outlet of the gas cylinder is connected to a gas guide pipe.

[0013] Furthermore, a hydraulic cylinder one and a hydraulic cylinder two are mounted on the outside of the drain valve. One end of the hydraulic cylinder two is provided with an air guide pipe interface connected to the air guide pipe, and the other end is provided with a hydraulic oil pipe connected to the hydraulic cylinder one.

[0014] Furthermore, a piston is slidably installed inside the hydraulic cylinder, and the piston is connected to the valve core. A piston is installed inside the hydraulic cylinder, wherein the cross-sectional area of ​​the piston is larger than that of the piston. After the temperature of the asphalt pavement rises, it heats the gas in the gas cylinder, causing it to expand and enter the hydraulic cylinder, pushing the piston to press the hydraulic oil into the hydraulic cylinder. After the hydraulic oil enters the hydraulic cylinder, it pushes the piston to move the valve core and open the drain valve.

[0015] Furthermore, the side water tank is equipped with a grating facing the asphalt pavement, and an overflow pipe is installed inside the side water tank. The top of the overflow pipe is located below the grating of the side water tank, and the bottom of the overflow pipe is connected to the drain pipe.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The device relies entirely on natural rainwater collection for water supply, without the need for external municipal water sources. It utilizes liquid level differences and siphon effects to achieve water circulation and heat dissipation, requiring no external power source and having extremely low operating costs. It is suitable for various road and bridge sections, especially remote areas without power supply, and is green, environmentally friendly, and has significant water-saving effects.

[0018] By combining the thermal expansion and contraction of the gas cylinder with a hydraulic transmission structure, the opening of the drain valve can be automatically adjusted according to the temperature of the asphalt pavement. At high temperatures, the valve circulates and dissipates heat at a large flow rate, while at low temperatures, the valve circulates at a small flow rate or stops draining, thus avoiding waste of water resources.

[0019] The central water tank is equipped with a buoyancy linkage component, which automatically opens the water injection valve to replenish water when the rainwater overflows, ensuring that the siphon bend is always full of water. No manual water injection is required to start the siphon, and it operates autonomously around the clock.

[0020] The balancing air pipe balances the air pressure between the side water tank and the buffer pipe, ensuring rapid start and stop of the siphon effect. The side water tank is equipped with an overflow pipe for independent drainage, which is not affected by the opening and closing of the drain valve, thus eliminating the problem of water accumulation on the road. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention.

[0022] Figure 2 This is a structural schematic diagram of the precast concrete pipe lining of the present invention.

[0023] Figure 3 It is attached Figure 2 An enlarged schematic diagram of point a in the middle.

[0024] Figure 4 This is a schematic diagram of the siphon bend of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the buffer tube of the present invention.

[0026] Figure 6 This is a schematic diagram of the water injection valve closing structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the structure for opening the water injection valve of the present invention.

[0028] Figure 8 This is a schematic diagram of the structure of the drain valve of the present invention.

[0029] Figure 9 This is a schematic diagram of the drain valve closing structure of the present invention.

[0030] Figure 10 This is a schematic diagram of the structure for opening the drain valve of the present invention.

[0031] Figure 11 This is a schematic diagram illustrating the working principle of the present invention.

[0032] As shown in the figure: 1. Side water tank, 2. Central water tank, 3. Buffer pipe, 4. Precast concrete pipe lining, 5. Siphon bend, 6. Water injection valve, 7. Four-way valve, 8. Water injection pipe, 9. Gas cylinder, 10. Air guide pipe, 11. Drain pipe, 12. Drain valve, 13. Overflow pipe, 14. Balance air guide pipe, 15. Buoyancy component bracket, 16. Buoyancy rod, 17. Lever, 18. Float, 19. Connecting rod, 20. Valve core one, 21. Hydraulic cylinder one, 22. Hydraulic cylinder two, 23. Air guide pipe interface, 24. Hydraulic cylinder bracket, 25. Valve core two, 26. Piston one, 27. Return spring, 28. Piston two, 29. Hydraulic oil pipe. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings.

[0034] Combined with appendix Figure 1 and attached Figure 2 A rainwater circulation cooling device for asphalt pavement of road and bridge includes a side water tank 1, a central water tank 2 and a buffer pipe 3. The side water tank 1 is installed on both sides of the bridge, the central water tank 2 is located in the center of the bridge, and the buffer pipe 3 is suspended and installed under the bridge. The height of the buffer pipe 3 is slightly higher than the bottom of the side water tank 1, and the installation height of the central water tank 2 is higher than the top of the side water tank 1.

[0035] Combined with appendix Figure 2 Appendix Figure 5 and attached Figure 11 The side water tank 1 is equipped with a grating facing the asphalt pavement. An overflow pipe 13 is provided inside the side water tank 1. The top of the overflow pipe 13 is located below the grating of the side water tank 1, and the bottom of the overflow pipe 13 is connected to the drain pipe 11.

[0036] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4 and attached Figure 5 A precast concrete pipe liner 4 is laid under the asphalt surface of the bridge. The precast concrete pipe liner 4 has a corrugated structure, and a siphon bend 5 is laid in its concave part. One end of the siphon bend 5 extends into the side water tank 1, and the other end extends under the central water tank 2. The asphalt surface of the bridge is laid on top of the precast concrete pipe liner 4.

[0037] Combined with appendix Figure 2 Appendix Figure 5 and attached Figure 11The central water tank 2 is equipped with a water injection pipe 8 at the bottom, and a four-way connector 7 is connected to the end of the water injection pipe 8. The end of the siphon bend pipe 5 near the outside of the road extends into the side water tank 1, and the end of the siphon bend pipe 5 near the middle of the road is connected to the four-way connector 7. The end of the water injection pipe 8 extends into the buffer pipe 3. A drain pipe 11 is installed at the bottom of the buffer pipe 3, and the top of the drain pipe 11 extends into the buffer pipe 3. The top of the drain pipe 11 is higher than the bottom of the water injection pipe 8. A balance air guide pipe 14 is installed at the top of the buffer pipe 3. One end of the balance air guide pipe 14 extends into the top of the inner side of the buffer pipe 3, and the other end extends into the top of the inner side of the side water tank 1.

[0038] When the side water tank 1 contains enough rainwater, the liquid level in the side water tank 1 is higher than that in the buffer pipe 3. The siphon bend 5 can drain the rainwater in the side water tank 1 into the buffer pipe 3 through the siphon effect. During this process, the rainwater in the siphon bend 5 continuously absorbs heat from the asphalt pavement, thereby cooling the asphalt.

[0039] When the asphalt pavement temperature is high and the liquid level in the buffer pipe 3 exceeds that in the drain pipe 11, the rainwater inside is discharged outward, forming a circulation path where the rainwater leaves the side water tank 1, absorbs heat from the asphalt pavement, and is eventually discharged. As the rainwater continues to be discharged, when the liquid level inside the side water tank 1 is lower than the height of the end of the balance air duct 14, the buffer pipe 3 is connected to the atmosphere through the balance air duct 14. In this state, while the rainwater in the buffer pipe 3 is discharged from the drain pipe 11, it is simultaneously siphoned into the side water tank 1 and draws in air from the balance air duct 14. When the balance air duct 14 is not connected to the atmosphere, the volumetric flow rate of the fluid drawn from the side water tank 1 by the buffer pipe 3 is entirely determined by the siphon of the siphon bend 5. Water flow is provided, and when the balancing air pipe 14 is connected to the atmosphere, the volumetric flow rate of the fluid drawn from the side water tank 1 by the buffer pipe 3 is partly provided by the siphon water flow rate of the siphon bend 5, and the other part is provided by the air flow rate drawn in by the balancing air pipe 14. Since the drainage flow rate of the drain pipe 11 is limited, the volumetric flow rate of the fluid discharged outward by the buffer pipe 3 is limited by the drainage flow rate of the drain pipe 11. Therefore, the volumetric flow rate of the fluid drawn from the side water tank 1 by the buffer pipe 3 also has an upper limit. When the balancing air pipe 14 draws in air, it can reduce the flow rate of rainwater siphoned in by the siphon bend 5 from the side water tank 1, thereby reducing the siphon flow rate when the liquid level inside the side water tank 1 is low.

[0040] When the liquid level inside the side water tank 1 is lower than the height of the drain pipe 11 opening, the drain pipe 11 cannot drain water. At the same time, there is no liquid level difference between the side water tank 1 and the buffer pipe 3, so the siphon effect is suspended. In this state, the rainwater level in the side water tank 1 and the buffer pipe 3 is still higher than the height of the pipe openings at both ends of the siphon bend 5, which allows the siphon bend 5 to be filled with rainwater. Afterwards, when the liquid level inside the side water tank 1 rises, there is no need to start the siphon to immediately dissipate heat.

[0041] Combined with appendix Figure 2 Appendix Figure 6 and attached Figure 7 The water injection pipe 8 is equipped with a water injection valve 6, and the water injection valve 6 contains a horizontally movable valve core 20. The central water tank 2 is equipped with a buoyancy control linkage assembly for opening and closing the water injection valve 6. The side wall of the central water tank 2 is equipped with a buoyancy assembly bracket 15. A buoyancy rod 16 is hinged to one side of the buoyancy assembly bracket 15, and a lever 17 is hinged to the other side. A connecting rod 19 is provided at the top of the buoyancy assembly bracket 15. One end of the connecting rod 19 is hinged to the buoyancy rod 16, and the other end is hinged to the lever 17. The bottom end of the lever 17 is connected to the valve core 20. A float 18 is provided at the end of the buoyancy rod 16. When there is water inside the central water tank 2, the buoyancy causes the float 18 to float, causing the buoyancy rod 16 to rotate upward around its own hinge connection point. The rotation of the buoyancy rod 16 pushes the connecting rod 19 to move, and the connecting rod 19 pushes the lever 17 to swing. When the lever 17 swings, the bottom of the lever 17 drives the valve core 20 to move, thus opening the water injection valve 6.

[0042] When enough rainwater is collected in the central water tank 2 during rainy days, the water injection valve 6 can be opened by buoyancy. The rainwater in the central water tank 2 flows into the water injection pipe 8 and the siphon bend 5 through the four-way valve 7, which is opened by buoyancy. This allows water to be injected into the side water tank 1 and the buffer pipe 3 at the same time, ensuring that as long as the rainfall is sufficient, the siphon bend 5 will always be filled with enough water to achieve the siphon effect. In most cases, there is no need to manually inject water to start the siphon.

[0043] Combined with appendix Figure 5 The drain pipe 11 is equipped with a drain valve 12, and the drain valve 12 is equipped with a horizontally movable valve core 25. The bottom of the central water tank 2 is equipped with a linkage component for opening and closing the bridge asphalt surface temperature control drain valve 12.

[0044] Combined with appendix Figure 2 and attached Figure 3 The precast concrete pipe liner 4 has a corrugated structure with a gas cylinder 9 inside. The outlet of the gas cylinder 9 extends to the bottom of the central water tank 2, and the outlet of the gas cylinder 9 is connected to a gas guide pipe 10.

[0045] Combined with appendix Figure 8 Appendix Figure 9 and attached Figure 10The drain valve 12 is provided with a hydraulic cylinder support 24 on its outer side. The hydraulic cylinder support 24 is provided with a first hydraulic cylinder 21 and a second hydraulic cylinder 22. One end of the second hydraulic cylinder 22 is provided with a vent pipe interface 23 connected to the vent pipe 10, and the other end is provided with a hydraulic oil pipe 29 connected to the first hydraulic cylinder 21. A first piston 26 is slidably arranged inside the first hydraulic cylinder 21. The first piston 26 is connected to the second valve core 25. A second piston 28 is provided inside the second hydraulic cylinder 22. The cross-sectional area of ​​the first piston 26 is larger than that of the second piston 28. After the temperature of the asphalt pavement rises, it heats the gas in the gas cylinder 9, causing it to expand and enter the second hydraulic cylinder 22. The second piston 28 pushes the second piston 28 to press the hydraulic oil into the first hydraulic cylinder 21. After the hydraulic oil enters the first hydraulic cylinder 21, it pushes the first piston 26 to move the second valve core 25 and open the drain valve 12. A return spring 27 is provided inside the first hydraulic cylinder 21 to push the first piston 26 to press the hydraulic oil into the second hydraulic cylinder 22.

[0046] With the above structure, the drain valve 12 can be opened to drain and cool the asphalt pavement when the temperature is high enough. The opening temperature of the drain valve 12 can be manually adjusted by selecting the return spring 27. The gas expansion ratio in the gas cylinder 9 is linearly related to the temperature rise, so the displacement distance of piston 1 26 and piston 2 28 is linearly related to the temperature rise of the asphalt pavement. Thus, the opening degree of the drain valve 12 can be automatically adjusted according to the temperature rise of the asphalt pavement, thereby realizing that the drainage and heat dissipation flow rate changes with the temperature of the asphalt pavement.

[0047] The bottom of the overflow pipe 13 must be connected to the drain pipe 11 at a position lower than the drain valve 12 so that the overflow drainage of the side water tank 1 is not affected by the opening and closing of the drain valve 12, thus preventing water accumulation on the bridge.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the actual structure is not limited thereto. In conclusion, if those skilled in the art, inspired by this description, design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the scope of protection of this invention.

Claims

1. A rainwater circulation cooling device for asphalt pavement of a road and bridge, comprising side water tanks (1), a central water tank (2), and a buffer pipe (3), wherein the side water tanks (1) are installed on both sides of the bridge, the central water tank (2) is located in the center of the bridge, the buffer pipe (3) is suspended and installed below the bridge, the suspension height of the buffer pipe (3) is higher than the bottom of the side water tanks (1), and the installation height of the central water tank (2) is higher than the top of the side water tanks (1), characterized in that: A precast concrete pipe liner (4) is laid under the asphalt surface of the bridge. The precast concrete pipe liner (4) has a corrugated structure. A siphon bend (5) is laid in its concave part. One end of the siphon bend (5) extends into the side water tank (1), and the other end extends to the bottom of the central water tank (2). The central water tank (2) is equipped with a water injection pipe (8) at the bottom, and a four-way connector (7) is connected to the end of the water injection pipe (8). The end of the siphon bend (5) near the outside of the road extends into the side water tank (1). The end of the siphon bend (5) near the middle of the road is connected to the four-way connector (7). The end of the water injection pipe (8) extends into the buffer pipe (3). The bottom of the buffer pipe (3) is equipped with a drain pipe (11). The top of the drain pipe (11) extends into the buffer pipe (3). The top of the drain pipe (11) is higher than the bottom of the water injection pipe (8). The top of the buffer pipe (3) is equipped with a balance air guide pipe (14). One end of the balance air guide pipe (14) extends into the top of the inner side of the buffer pipe (3), and the other end extends into the top of the inner side of the side water tank (1).

2. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 1, characterized in that: The water injection pipe (8) is equipped with a water injection valve (6), and the water injection valve (6) is equipped with a horizontally movable valve core (20). The central water tank (2) is equipped with a linkage component for controlling the opening and closing of the water injection valve (6) by buoyancy.

3. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 2, characterized in that: The central water tank (2) is provided with a buoyancy component bracket (15) on its side wall. A buoyancy rod (16) is hinged on one side of the buoyancy component bracket (15), and a lever (17) is hinged on the other side. A connecting rod (19) is provided at the top of the buoyancy component bracket (15). One end of the connecting rod (19) is hinged to the buoyancy rod (16), and the other end is hinged to the lever (17). The bottom end of the lever (17) is connected to the valve core (20). A float (18) is provided at the end of the buoyancy rod (16). When there is water inside the central water tank (2), the buoyancy causes the buoyancy rod (16) to rotate upward. The valve core (20) moves through the connecting rod (19) and the lever (17), thereby opening the water injection valve (6).

4. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 1, characterized in that: The drain pipe (11) is equipped with a drain valve (12), and the drain valve (12) is equipped with a horizontally movable valve core (25). The bottom of the central water tank (2) is equipped with a linkage assembly for opening and closing the bridge asphalt surface temperature control drain valve (12).

5. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 4, characterized in that: The precast concrete pipe lining (4) has a gas cylinder (9) inside its corrugated structure. The outlet of the gas cylinder (9) extends to the bottom of the central water tank (2), and the outlet of the gas cylinder (9) is connected to a gas guide pipe (10).

6. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 5, characterized in that: The drain valve (12) is equipped with a hydraulic cylinder one (21) and a hydraulic cylinder two (22) on its outer side. One end of the hydraulic cylinder two (22) is provided with an air guide pipe interface (23) connected to the air guide pipe (10), and the other end is provided with a hydraulic oil pipe (29) connected to the hydraulic cylinder one (21).

7. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 6, characterized in that: The hydraulic cylinder 1 (21) has a piston 1 (26) slidably installed inside. The piston 1 (26) is connected to the valve core 2 (25). The hydraulic cylinder 2 (22) has a piston 2 (28) inside. The cross-sectional area of ​​the piston 1 (26) is larger than that of the piston 2 (28). After the temperature of the asphalt pavement rises, it heats the gas in the gas cylinder (9), causing it to expand and enter the hydraulic cylinder 2 (22). It pushes the piston 2 (28) to press the hydraulic oil into the hydraulic cylinder 1 (21). After the hydraulic oil enters the hydraulic cylinder 1 (21), it pushes the piston 1 (26) to drive the valve core 2 (25) to move and open the drain valve (12).

8. The rainwater circulation cooling device for road and bridge asphalt surfaces according to claim 1, characterized in that: The side water tank (1) is equipped with a grille facing the asphalt pavement. An overflow pipe (13) is provided inside the side water tank (1). The top of the overflow pipe (13) is located below the grille of the side water tank (1). The bottom of the overflow pipe (13) is connected to the drain pipe (11).

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