Bridge drainage system and its drainage method

Abstract

The present invention belongs to the technical field of bridge drainage devices, and particularly relates to a bridge drainage system and a drainage method thereof. A number of drainage units are respectively arranged on both sides of the bridge, and one drainage unit is arranged at intervals on the same side of the bridge. The drainage unit includes a drainage ditch body, and the upper part of the drainage ditch body is longitudinally partitioned by a longitudinal partition wall into a first cavity and a second cavity. The first cavity is divided into a first drainage ditch and a second drainage ditch by a drainage-side longitudinal partition board, and a longitudinal overflow board is installed on the upper part of the drainage-side longitudinal partition board. The first drainage ditches of all the drainage units on the same side of the bridge are interconnected, and the second drainage ditches of all the drainage units on the same side of the bridge are interconnected. A filter plate is arranged inside the system, which can switch the rainwater flow path according to the rainfall and the water accumulation situation on the bridge, and can pass through the filter plate from top to bottom or from bottom to top during the drainage process to achieve its filtration and backwashing, and avoid blockage.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge drainage devices, and particularly relates to a bridge drainage system and a drainage method thereof. Background Art

[0002] In modern society, public transportation mainly relies on bridges. To cope with rainy weather, drainage devices are often installed on both sides of bridges. Existing drainage devices mostly use simple floor drains in combination with pipe drainage, which may have the following problems. Firstly, the pipeline is simple and cannot be adjusted in the face of extreme weather such as heavy rain. Secondly, only filtered by the floor drain, the drainage pipeline is prone to blockage after being used for a period of time. Summary of the Invention

[0003] In view of the defects of the prior art, the present invention provides a bridge drainage system and a drainage method thereof. A filter plate is arranged inside the system, which can switch the rainwater flow path according to the rainfall and the water accumulation situation on the bridge, and can pass through the filter plate from top to bottom or from bottom to top during the drainage process to achieve its filtration and backwashing, avoiding blockage.

[0004] To achieve the above object, the technical solution of the present invention is a bridge drainage system. A number of drainage units are respectively arranged on both sides of the bridge, and one drainage unit is arranged at intervals on the same side of the bridge; each drainage unit includes a drainage ditch body, the upper part of the drainage ditch body is longitudinally divided by a longitudinal partition wall into a first cavity and a second cavity, the first cavity is divided into a first drainage ditch and a second drainage ditch by a drainage-side longitudinal partition plate, a longitudinal overflow plate is installed on the upper part of the drainage-side longitudinal partition plate, the first drainage ditches of all drainage units on the same side of the bridge are interconnected, and the second drainage ditches of all drainage units on the same side of the bridge are interconnected.

[0005] Furthermore, the upper part of the drain body is separated into a first cavity and a second cavity by a longitudinal partition wall. The first cavity is divided into a first drain and a second drain by a longitudinal partition plate on the drainage side. A longitudinal overflow plate is installed on the upper part of the longitudinal partition plate on the drainage side, and a transverse partition is fixed at the bottom of the longitudinal partition plate on the drainage side. The transverse partition extends from the longitudinal partition plate on the drainage side to the side wall of the drain body, and a longitudinal water passage is opened on the transverse partition. The second cavity is divided into a first water outlet cavity and a second water outlet cavity by a longitudinal partition plate on the driving side; a first filter plate is installed at the bottom of the first drain. A first pipe is connected to the drain body above the first filter plate, and a second pipe is connected to the drain body below the first filter plate; a second filter plate is installed inside the first water outlet cavity. A first water passage hole is opened on the longitudinal partition plate above the second filter plate, and a second water passage hole is opened on the longitudinal partition plate below the second filter plate; a second driving device is installed at the top inside the second water outlet cavity. The second driving device drives a second screw rod to rotate. A sleeve is threadedly connected to the second screw rod, and the sleeve is fixedly connected to a blocking block. The blocking block can move up and down inside the second water outlet cavity to block or connect the upper and lower parts of the longitudinal water passage; the second water outlet cavity is connected to a third pipe.

[0006] Furthermore, one end of the second screw rod is connected to the output shaft of the second driving device through a coupling. The second screw rod includes an upper threaded part and a lower threaded part with opposite helix directions. The sleeve is connected to the lower threaded part, and the upper threaded part is connected to an upper moving block.

[0007] Furthermore, a plurality of longitudinal water passage channels, internal annular water passage channels and internal water outlet channels of the blocking block are opened on the blocking block. The longitudinal water passage channels inside the blocking block are longitudinally arranged from the upper end face and communicate with the internal annular water passage channels. When the blocking block reaches the highest position, the internal annular water passage channels are connected to the second water passage holes through the internal water outlet channels of the blocking block.

[0008] Based on the above technical solutions, a flow path is arranged inside the blocking block, which can ensure that when the water flow cannot pass through the first water passage hole, the blocking block and the upper moving block gradually approach each other, and the water flow can flow to the second water passage hole through the flow path arranged inside the blocking block and then flow back to the first water outlet cavity, solving the problem that the water between the blocking block and the upper moving block cannot be discharged.

[0009] Furthermore, a first driving device is installed at the top inside the first water outlet cavity. The output shaft of the first driving device is connected to a first screw rod. A moving plate is threadedly connected to the first screw rod. A limiting block is installed on the inner wall of the first water outlet cavity. The moving plate can move between the second filter plate and the limiting block under the drive of the first screw rod.

[0010] Furthermore, a plurality of filter holes are arranged on the second filter plate, and brushes corresponding to the positions of the filter holes are arranged at the bottom of the moving plate.

[0011] Furthermore, a water baffle is detachably installed on the upper part of the drain body, and the water baffle is fixed on the outside of the first drain.

[0012] Furthermore, top filter plates are installed at the uppermost parts of the first drain and the second drain.

[0013] Furthermore, a first valve and a second valve are respectively arranged on the first pipe and the second pipe.

[0014] Furthermore, the longitudinal height of the position where the first water passing through hole is arranged is the same as that of the third pipe, and a third valve is arranged on the third pipe.

[0015] Furthermore, both the first driving device and the second driving device are impeller driving assemblies. The impeller driving assembly includes an impeller chamber. An impeller is rotatably installed inside the impeller chamber. An inlet and an outlet are arranged on the impeller chamber. High-pressure water flows in from the inlet and flows out from the outlet to drive the impeller to rotate. The main shaft of the impeller is connected to the threaded rod through a coupling.

[0016] Based on the above technical solution, high-pressure water flows in from the inlet. The high-pressure water can drive the impeller to rotate. When the impeller rotates, the main shaft of the impeller is connected to the threaded rod, driving the threaded rod to rotate. Specifically, the rotation of the first threaded rod can drive the moving plate threaded thereon to move in the first water outlet chamber, and the rotation of the second screw rod can drive the upper moving block and the stop block threaded thereon to move towards or away from each other. It should be noted that the filtered rainwater can be pressurized and used as power to drive the impeller.

[0017] Furthermore, both the first driving device and the second driving device are motor driving devices. The motor driving device includes a driving motor and a speed reducer. The driving motor is connected to the speed reducer, and the output shaft of the speed reducer is connected to the threaded rod through a coupling.

[0018] Furthermore, a water discharge inclined plate is arranged on the upper parts of the first driving device and the second driving device. One side of the water discharge inclined plate is hinged to the drain body.

[0019] Based on the above technical solution, with the water discharge inclined plate arranged, rainwater can flow from the bridge along the water discharge inclined plate into the first drain and the second drain. When it is necessary to repair the first driving device and the second driving device, the hinged water discharge inclined plate can be opened to repair the internal driving motor, which is more convenient.

[0020] Further, a liquid level sensor is provided on the longitudinal overflow plate for sensing the drainage liquid level. The bridge drainage system further includes a PLC control device. The first valve, the second valve and the third valve are all solenoid valves. The PLC control device is electrically connected to the first valve, the second valve and the third valve. The first driving device and the second driving device are controlled by the PLC control device. The liquid level sensor transmits a signal to the PLC control device, and the PLC control device controls the actions of the first driving device and the second driving device and the opening and closing of the first valve, the second valve and the third valve, so as to switch the drainage stage according to the rainfall.

[0021] On the other hand, the present invention provides a bridge drainage method, which includes the following three drainage stages:

[0022] Drainage stage for relatively small rainfall: Open the first valve and close the second valve; drive the first screw rod to move the moving plate to the lowest position, and the moving plate contacts the second filter plate; drive the second screw rod, and the sleeve drives the blocking block to the highest position and the upper moving block to the lowest position. The rainwater does not cross the longitudinal overflow plate, and the rainwater flows into the second drainage ditch. Large impurities brought by the rainwater are filtered out by the top filter plate. The rainwater enters the second drainage ditch, flows to the longitudinal water passage opened on the transverse partition through the second drainage ditch, and passes through the first filter plate from bottom to top for secondary filtration after passing through the longitudinal water passage, and then flows out through the first pipe;

[0023] Drainage stage for relatively large rainfall: Close the first valve and open the second valve; drive the first screw rod to move the moving plate to the highest position, and the moving plate contacts the limit block. Drive the second screw rod, and the sleeve drives the blocking block to the lowest position. The blocking block blocks the longitudinal water passage, and the upper moving block moves to the highest position. The first water outlet cavity is communicated with the second water outlet cavity; the rainwater crosses the longitudinal overflow plate, and the rainwater flows into the first drainage ditch and the second drainage ditch. Large impurities brought by the rainwater are filtered out by the top filter plate. Part of the rainwater enters the first drainage ditch, and the rainwater passes through the first filter plate from top to bottom for secondary filtration, and then flows out through the second pipe; Another part of the rainwater enters the second drainage ditch, and the rainwater passes through the second filter plate from bottom to top for secondary filtration, then passes through the first water outlet cavity through the first water passing through hole to the second water outlet cavity, and then flows out through the third pipe from the second water outlet cavity;

[0024] Switching stage from drainage stage for relatively large rainfall to drainage stage for relatively small rainfall: Close the third valve, drive the first screw rod to lower the moving plate, drive the second screw rod, and the sleeve drives the blocking block to move upward and the upper moving block to move downward. During this process, the water in the second water outlet cavity passes through the first water passing through hole to the first water outlet cavity. The moving plate moves downward, and the rainwater passes through the second filter plate from top to bottom. Part of the rainwater between the blocking block and the upper moving block passes through the longitudinal water passage, passes through the internal annular water passage and the water outlet passage inside the blocking block to the first water outlet cavity.

[0025] Advantages of the present invention: A filter plate is provided inside the system, which can switch the rainwater flow path according to the rainfall and the water accumulation situation on the bridge. It can pass through the filter plate from top to bottom or from bottom to top during the drainage process to achieve its filtration and backwashing, avoiding blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a schematic structural diagram of the present invention during the large-rainfall drainage stage (left side of the bridge);

[0028] Figure 3 is a schematic structural diagram of the present invention during the large-rainfall drainage stage (right side of the bridge);

[0029] Figure 4 is a schematic structural diagram of the present invention during the small-rainfall drainage stage (left side of the bridge);

[0030] Figure 5 is a schematic structural diagram of the present invention during the small-rainfall drainage stage (left side of the bridge);

[0031] Figure 6 is a schematic structural diagram of the large-rainfall drainage stage (left side of the bridge) of Embodiment 2 and Embodiment 3;

[0032] Figure 7 is a schematic structural diagram of the large-rainfall drainage stage (right side of the bridge) of Embodiment 2 and Embodiment 3;

[0033] Figure 8 is a schematic structural diagram of the small-rainfall drainage stage (left side of the bridge) of Embodiment 2 and Embodiment 3;

[0034] Figure 9 is a schematic structural diagram of the small-rainfall drainage stage (right side of the bridge) of Embodiment 2 and Embodiment 3;

[0035] Figure 10 is a partial enlarged view of the positions of the first water outlet cavity and the second water outlet cavity;

[0036] Figure 11 is a schematic structural diagram of the moving plate (with a brush);

[0037] Figure 12 is a top view of the moving plate (with a brush);

[0038] Figure 13 is a top view of the overall system of Embodiment 1;

[0039] Figure 14 is a connection relationship diagram of the PLC control device in Embodiment 3;

[0040] In the figure: 1. Drainage unit; 2. Drainage ditch body; 3. Longitudinal partition wall; 4. First cavity; 5. Second cavity; 6. Drainage-side longitudinal partition board; 7. First drainage ditch; 8. Second drainage ditch; 9. Longitudinal overflow board; 10. Fixed transverse partition board; 10.1 Longitudinal water passage; 11. Driving-side longitudinal partition board; 11.1 First water through-hole; 11.2 Second water through-hole; 12. First water outlet cavity; 13. Second water outlet cavity; 14. First filter board; 15. First pipeline; 15.1 First valve; 16.1 Second valve; 16. Second pipeline; 17. Second filter board; 18. Second driving device; 19. Second screw; 19.1 Upper threaded part; 19.2 Lower threaded part; 20. Sleeve; 21. Blocking block; 21.1 Internal longitudinal water passage of the blocking block; 21.2 Internal annular water passage; 21.3 Internal water outlet passage of the blocking block; 22. Third pipeline; 22.1 Third valve; 23. Upper moving block; 24. First driving device; 25. First screw; 26. Moving plate; 27. Limit block; 28. Brush; 29. Water baffle; 30. Top filter board; 31. Impeller cavity; 31.1 Water inlet; 31.2 Water outlet; 32. Impeller; 33. Driving motor; 34. Reducer; 35. Drainage inclined plate; 36. Liquid level sensor; 37. PLC control device. Detailed implementation mode

[0041] The technical solution of this patent will be further described in detail below in conjunction with the specific implementation mode.

[0042] Embodiment 1

[0043] For the bridge drainage system, a number of drainage units 1 are respectively arranged on both sides of the bridge, and one drainage unit 1 is arranged at intervals on the same side of the bridge; the drainage unit 1 includes a drainage ditch body 2, and the upper part of the drainage ditch body 2 is separated into a first cavity 4 and a second cavity 5 by a longitudinal partition wall 3. The first cavity 4 is divided into a first drainage ditch 7 and a second drainage ditch 8 by a drainage-side longitudinal partition board 6. A longitudinal overflow board 9 is installed on the upper part of the drainage-side longitudinal partition board 6. The longitudinal overflow board 9 at this position can control the rainwater to drain into the second drainage ditch 8 when the rainfall is small, starting the drainage method in the small-rainfall drainage stage. If necessary, a water pump can be set at an appropriate position in the entire drainage path. The first drainage ditches 7 of all the drainage units on the same side of the bridge are interconnected, and the second drainage ditches 8 of all the drainage units on the same side of the bridge are interconnected.

[0044] The bottom of the longitudinal partition plate 6 on the drainage side is fixedly connected to the transverse partition plate 10. The transverse partition plate 10 extends from the longitudinal partition plate 6 on the drainage side to the side wall of the drainage ditch body 2 on the second cavity 5 side. A longitudinal water passage 10.1 is provided on the transverse partition plate 10. The second cavity 5 is divided into a first water outlet cavity 12 and a second water outlet cavity 13 by the driving side longitudinal partition plate 11. A first filter plate 14 is installed at the bottom of the first drainage ditch 7. The drainage ditch body 2 above the first filter plate 14 is connected to the first pipe 15, and the drainage ditch body 2 below the first filter plate 14 is connected to the second pipe 16. A second filter plate 17 is installed inside the first water outlet cavity 12. A first water through hole 11.1 is provided on the driving side longitudinal partition plate 11 above the second filter plate 17, and a second water through hole 11.2 is provided on the driving side longitudinal partition plate 11 below the second filter plate 17. A second driving device 18 is installed at the top inside the second water outlet cavity 13. The second driving device 18 drives the second screw 19 to rotate. A sleeve 20 is threadedly connected to the second screw 19. The sleeve 20 is fixedly connected to a blocking block 21. The blocking block 21 can move up and down inside the second water outlet cavity 13 to block or connect the upper and lower parts of the longitudinal water passage 10.1. The second water outlet cavity 13 is connected to the third pipe 22.

[0045] Further, one end of the second screw 19 is connected to the output shaft of the second driving device through a coupling. The second screw 19 includes an upper threaded portion 19.1 and a lower threaded portion 19.2 with opposite helix directions. The sleeve 20 is connected to the lower threaded portion 19.2, and the upper threaded portion 19.1 is connected to an upper moving block 23.

[0046] Further, a plurality of longitudinal water passages 21.1 inside the blocking block, an internal annular water passage 21.2, and a water outlet passage 21.3 inside the blocking block are provided on the blocking block 21. The longitudinal water passage 21.1 inside the blocking block is longitudinally arranged on the upper end surface of the blocking block 21 and communicates with the internal annular water passage 21.2. When the blocking block 21 is at the highest position, the internal annular water passage 21.2 is connected to the second water through hole 11.2 through the water outlet passage 21.3 inside the blocking block 21.

[0047] Further, a first driving device 24 is installed at the top inside the first water outlet cavity 12. The output shaft of the first driving device 24 is connected to the first screw 25. A moving plate 26 is threadedly connected to the first screw 25. A limiting block 27 is installed on the inner wall of the first water outlet cavity 12. Driven by the first screw 25, the moving plate 26 can move between the second filter plate 17 and the limiting block 27.

[0048] It should be noted that the bottom of the first screw 25 is rotatably connected to a fixed sleeve. The fixed sleeve is fixedly connected to the inner wall of the first water outlet cavity 12 through a plurality of connecting ribs distributed in a scattered manner. The first screw 25 is rotatably connected to the fixed sleeve through a bearing.

[0049] Further, a plurality of filter holes are provided on the second filter plate 17, and a brush 28 corresponding to the position of the filter holes is provided at the bottom of the moving plate 26.

[0050] Further, a water baffle 29 is detachably installed on the upper part of the drain body 2, and the water baffle 29 is fixed on the outside of the first drain 7.

[0051] Further, top filter plates 30 are installed at the uppermost parts of the first drain 7 and the second drain 8 respectively.

[0052] Further, a first valve 15.1 and a second valve 16.1 are respectively provided on the first pipe 15 and the second pipe 16.

[0053] Further, the longitudinal height of the position where the first water passing through hole 11.1 is provided is the same as that of the third pipe 22, and a third valve 22.1 is provided on the third pipe 22.

[0054] Further, both the first driving device 24 and the second driving device 18 are impeller driving assemblies. The impeller driving assembly includes an impeller chamber 31. An impeller 32 is rotatably installed inside the impeller chamber 31. An inlet 31.1 and an outlet 31.2 are provided on the impeller chamber 31. High-pressure water flow enters from the inlet 31.1 and flows out from the outlet 31.2 to drive the impeller 32 to rotate. The main shaft of the impeller 32 is connected to the threaded rod through a coupling.

[0055] It should be noted that the high-pressure water flow enters from the inlet 31.1. The high-pressure water can drive the impeller 32 to rotate. When the impeller 32 rotates, the main shaft of the impeller is connected to the threaded rod to drive the threaded rod to rotate. Specifically, the rotation of the first threaded rod can drive the moving plate 26 threadedly connected thereto to move in the first water outlet chamber 12, and the rotation of the second screw 19 can drive the upper moving block 23 and the blocking block 21 threadedly connected thereto to move towards each other or away from each other.

[0056] On the other hand, the present invention provides a bridge drainage method, which includes the following three drainage stages:

[0057] Drainage stage for less rainfall: Open the first valve 15.1 and close the second valve 16.1; Drive the first screw 25 to move the moving plate 26 to the lowest position, and the moving plate 26 contacts the second filter plate 17; Drive the second screw 19, the sleeve 20 drives the blocking block 21 to the highest position, and the upper moving block 23 to the lowest position. The rainwater does not cross the longitudinal overflow plate 9. The rainwater flows to the second drain 8. The large impurities brought by the rainwater are filtered out by the top filter plate 30. The rainwater enters the second drain 8, flows to the longitudinal water passing channel opened on the transverse partition, passes through the longitudinal water passing channel and then passes through the first filter plate 14 from bottom to top for secondary filtration, and then flows out through the first pipe;

[0058] Drainage stage with large rainfall: close the first valve 15.1 and open the second valve 16.1; drive the first screw 25, move the plate 26 to the highest position, the plate 26 contacts the limit block 27, drive the second screw 19, the sleeve 20 drives the blocking block 21 to the lowest position, the blocking block 21 blocks the longitudinal water passage, the upper moving block 23 moves to the highest position, the first water outlet chamber 12 is connected with the second water outlet chamber 13; the rainwater passes over the longitudinal overflow plate 9 and flows to the first drainage ditch 7 and the second drainage ditch 7. The second drainage ditch 8 filters out large impurities brought by rainwater at the top filter plate 30, and a part of the rainwater enters the first drainage ditch 7, and the rainwater passes through the first filter plate 14 from top to bottom for secondary filtration, and then flows out from the second pipe 16; another part of the rainwater enters the second drainage ditch 8, and the rainwater passes through the second filter plate 17 from bottom to top for secondary filtration, and then passes through the first water outlet cavity 12 through the first water through hole 11.1 to the second water outlet cavity 13, and then flows out from the second water outlet cavity 13 through the third pipe;

[0059] Switching stage from drainage of larger rainfall to drainage of smaller rainfall: close the third valve, drive the first screw 25, the movable plate 26 downward, drive the second screw 19, the sleeve drives the blocking block 21 upward, and the upper movable block 23 downward. In this process, the water in the second water outlet chamber 13 flows from the first water through hole 11.1 to the first water outlet chamber 12, the movable plate 26 moves downward, and the rainwater passes through the second filter plate 17 from top to bottom. Part of the rainwater between the blocking block 21 and the upper movable block 23 passes through the longitudinal water passage, through the internal annular water passage and the internal water outlet passage of the blocking block 21 to the first water outlet chamber 12.

[0060] Example 2

[0061] A bridge drainage system, wherein a plurality of drainage units 1 are respectively arranged on both sides of the bridge, and a drainage unit 1 is arranged at a certain distance on the same side of the bridge; the drainage unit 1 comprises a drainage ditch body 2, the upper part of the drainage ditch body 2 is divided into a first cavity 4 and a second cavity 5 by a longitudinal partition wall 3, the first cavity 4 is divided into a first drainage ditch 7 and a second drainage ditch 8 by a drainage-side longitudinal partition plate 6, a longitudinal overflow plate 9 is installed on the upper part of the drainage-side longitudinal partition plate 6, the first drainage ditches 7 of all drainage units on the same side of the bridge are interconnected, and the second drainage ditches 8 of all drainage units on the same side of the bridge are interconnected.

[0062] The bottom of the longitudinal partition plate 6 on the drainage side is fixedly connected to the transverse partition plate 10. The transverse partition plate 10 extends from the longitudinal partition plate 6 on the drainage side to the side wall of the drainage ditch body 2 on the side of the second cavity 5. A longitudinal water passage 10.1 is formed on the transverse partition plate 10. The second cavity 5 is divided into a first water outlet cavity 12 and a second water outlet cavity 13 by the driving-side longitudinal partition plate 11. A first filter plate 14 is installed at the bottom of the first drainage ditch 7. The drainage ditch body 2 above the first filter plate 14 is connected to the first pipe 15, and the drainage ditch body 2 below the first filter plate 14 is connected to the second pipe 16. A second filter plate 17 is installed inside the first water outlet cavity 12. A first water through hole 11.1 is formed in the driving-side longitudinal partition plate 11 above the second filter plate 17, and a second water through hole 11.2 is formed in the driving-side longitudinal partition plate 11 below the second filter plate 17. A second driving device 18 is installed at the top inside the second water outlet cavity 13. The second driving device 18 drives the second screw rod 19 to rotate. A sleeve 20 is threadedly connected to the second screw rod 19. The sleeve 20 is fixedly connected to a blocking block 21. The blocking block 21 can move up and down inside the second water outlet cavity 13 to block or connect the upper and lower parts of the longitudinal water passage 10.1. The second water outlet cavity 13 is connected to the third pipe 22.

[0063] Further, one end of the second screw rod 19 is connected to the output shaft of the second driving device through a coupling. The second screw rod 19 includes an upper threaded portion 19.1 and a lower threaded portion 19.2 with opposite helix directions. The sleeve 20 is connected to the lower threaded portion 19.2, and the upper threaded portion 19.1 is connected to an upper moving block 23.

[0064] Further, a plurality of internal longitudinal water passages 21.1, internal annular water passages 21.2, and internal water outlet passages 21.3 of the blocking block are formed on the blocking block 21. The internal longitudinal water passage 21.1 of the blocking block is longitudinally arranged on the upper end surface of the blocking block 21 and communicates with the internal annular water passage 21.2. When the blocking block 21 is at the highest position, the internal annular water passage 21.2 is connected to the second water through hole 11.2 through the internal water outlet passage 21.3 of the blocking block 21.

[0065] Further, a first driving device 24 is installed at the top inside the first water outlet cavity 12. The output shaft of the first driving device 24 is connected to a first screw rod 25. A moving plate 26 is threadedly connected to the first screw rod 25. A limiting block 27 is installed on the inner wall of the first water outlet cavity 12. Driven by the first screw rod 25, the moving plate 26 can move between the second filter plate 17 and the limiting block 27.

[0066] It should be noted that the bottom of the first screw rod 25 is rotatably connected to a fixed sleeve. The fixed sleeve is fixedly connected to the inner wall of the first water outlet cavity 12 through a plurality of radially distributed connecting ribs. The first screw rod 25 is rotatably connected to the fixed sleeve through a bearing.

[0067] Further, a plurality of filter holes are provided on the second filter plate 17, and a brush 28 corresponding to the position of the filter holes is provided at the bottom of the moving plate 26.

[0068] Further, a water baffle 29 is detachably installed on the upper part of the drain body 2, and the water baffle 29 is fixed outside the first drain 7.

[0069] Further, top filter plates 30 are installed at the uppermost parts of the first drain 7 and the second drain 8 respectively.

[0070] Further, a first valve 15.1 and a second valve 16.1 are respectively provided on the first pipe 15 and the second pipe 16.

[0071] Further, the longitudinal height of the position where the first water passing through hole 11.1 is provided is the same as that of the third pipe 22, and a third valve 22.1 is provided on the third pipe 22.

[0072] Further, both the first driving device 24 and the second driving device 18 are motor driving devices. The motor driving device includes a driving motor 33 and a speed reducer 34. The driving motor 33 is connected to the speed reducer 34, and the output shaft of the speed reducer 34 is connected to the threaded rod through a coupling.

[0073] Further, a water discharge inclined plate 35 is provided on the upper parts of the first driving device 24 and the second driving device 18, and one side of the water discharge inclined plate 35 is hinged to the drain body 2.

[0074] On the other hand, the present invention provides a bridge drainage method, which includes the following three drainage stages:

[0075] Small rainfall drainage stage: Open the first valve 15.1 and close the second valve 16.1; Drive the first screw rod 25 to move the moving plate 26 to the lowest position, and the moving plate 26 contacts the second filter plate 17; Drive the second screw rod 19, the sleeve 20 drives the blocking block 21 to the highest position, and the upper moving block 23 to the lowest position. The rainwater does not cross the longitudinal overflow plate 9, and the rainwater flows into the second drain 8. The large impurities brought by the rainwater are filtered out by the top filter plate 30. The rainwater enters the second drain 8, passes through the longitudinal water passing channel opened on the transverse partition, and is secondarily filtered by the first filter plate 14 from bottom to top, and then flows out through the first pipe;

[0076] Large rainfall drainage stage: Close the first valve 15.1 and open the second valve 16.1; Drive the first screw rod 25, move the moving plate 26 to the highest position, the moving plate 26 contacts the limit block 27, drive the second screw rod 19, the sleeve 20 drives the blocking block 21 to the lowest position, the blocking block 21 blocks the longitudinal water passage, the upper moving block 23 moves to the highest position, and the first water outlet cavity 12 is connected to the second water outlet cavity 13; Rainwater crosses the longitudinal overflow plate 9, and the rainwater flows to the first drainage ditch 7 and the second drainage ditch 8. Large impurities brought by the rainwater are filtered out by the top filter plate 30. Part of the rainwater enters the first drainage ditch 7, and the rainwater passes through the first filter plate 14 from top to bottom for secondary filtration, and then flows out through the second pipeline 16; Another part of the rainwater enters the second drainage ditch 8, and the rainwater passes through the second filter plate 17 from bottom to top for secondary filtration, then passes from the first water outlet cavity 12 through the first water passing through hole 11.1 to the second water outlet cavity 13, and then flows out through the third pipeline from the second water outlet cavity 13;

[0077] Switching stage from large rainfall drainage to small rainfall drainage: Close the third valve, drive the first screw rod 25, the moving plate 26 moves downward, drive the second screw rod 19, the sleeve drives the blocking block 21 to move upward, and the upper moving block 23 moves downward. During this process, the water in the second water outlet cavity 13 passes from the first water passing through hole 11.1 to the first water outlet cavity 12. The moving plate 26 moves downward, and the rainwater passes through the second filter plate 17 from top to bottom. Part of the rainwater between the blocking block 21 and the upper moving block 23 passes through the longitudinal water passage, passes through the internal annular water passage and the water outlet passage inside the blocking block 21 to the first water outlet cavity 12.

[0078] Embodiment 3

[0079] Bridge drainage system, a number of drainage units 1 are respectively arranged on both sides of the bridge, and one drainage unit 1 is arranged at intervals on the same side of the bridge; Each drainage unit 1 includes a drainage ditch body 2, the upper part of the drainage ditch body 2 is divided into a first cavity 4 and a second cavity 5 by a longitudinal partition wall 3, the first cavity 4 is divided into a first drainage ditch 7 and a second drainage ditch 8 by a drainage side longitudinal partition plate 6, and a longitudinal overflow plate 9 is installed on the upper part of the drainage side longitudinal partition plate 6. The first drainage ditches 7 of all drainage units on the same side of the bridge are interconnected, and the second drainage ditches 8 of all drainage units on the same side of the bridge are interconnected.

[0080] The bottom of the longitudinal partition plate 6 on the drainage side is fixedly connected to the transverse partition plate 10. The transverse partition plate 10 extends from the longitudinal partition plate 6 on the drainage side to the side wall of the drainage ditch body 2 on the second cavity 5 side. A longitudinal water passage 10.1 is formed on the transverse partition plate 10. The second cavity 5 is divided into a first water outlet cavity 12 and a second water outlet cavity 13 by the driving side longitudinal partition plate 11. A first filter plate 14 is installed at the bottom of the first drainage ditch 7. The drainage ditch body 2 above the first filter plate 14 is connected to a first pipe 15, and the drainage ditch body 2 below the first filter plate 14 is connected to a second pipe 16. A second filter plate 17 is installed inside the first water outlet cavity 12. A first water passing through hole 11.1 is formed on the driving side longitudinal partition plate 11 above the second filter plate 17, and a second water passing through hole 11.2 is formed on the driving side longitudinal partition plate 11 below the second filter plate 17. A second driving device 18 is installed at the top inside the second water outlet cavity 13. The second driving device 18 drives the second screw rod 19 to rotate. A sleeve 20 is threadedly connected to the second screw rod 19. The sleeve 20 is fixedly connected to a blocking block 21. The blocking block 21 can move up and down inside the second water outlet cavity 13 to block or connect the upper and lower parts of the longitudinal water passage 10.1. The second water outlet cavity 13 is connected to a third pipe 22.

[0081] Further, one end of the second screw rod 19 is connected to the output shaft of the second driving device through a coupling. The second screw rod 19 includes an upper threaded portion 19.1 and a lower threaded portion 19.2 with opposite helix directions. The sleeve 20 is connected to the lower threaded portion 19.2, and the upper threaded portion 19.1 is connected to an upper moving block 23.

[0082] Further, a plurality of longitudinal water passages 21.1, internal annular water passages 21.2, and internal water outlet passages 21.3 of the blocking block are formed on the blocking block 21. The longitudinal water passage 21.1 inside the blocking block is longitudinally arranged on the upper end surface of the blocking block 21 and is connected to the internal annular water passage 21.2. When the blocking block 21 is at the highest position, the internal annular water passage 21.2 is connected to the second water passing through hole 11.2 through the internal water outlet passage 21.3 of the blocking block 21.

[0083] Further, a first driving device 24 is installed at the top inside the first water outlet cavity 12. The output shaft of the first driving device 24 is connected to a first screw rod 25. A moving plate 26 is threadedly connected to the first screw rod 25. A limiting block 27 is installed on the inner wall of the first water outlet cavity 12. Driven by the first screw rod 25, the moving plate 26 can move between the second filter plate 17 and the limiting block 27.

[0084] It should be noted that the bottom of the first screw rod 25 is rotatably connected to a fixed sleeve. The fixed sleeve is fixedly connected to the inner wall of the first water outlet cavity 12 through a plurality of connecting ribs distributed in a scattered manner. The first screw rod 25 and the fixed sleeve are rotatably connected through a bearing.

[0085] Further, a plurality of filter holes are provided on the second filter plate 17, and a brush 28 corresponding to the positions of the filter holes is provided at the bottom of the moving plate 26.

[0086] Further, a water retaining plate 29 is detachably installed on the upper part of the drain body 2, and the water retaining plate 29 is fixed on the outer side of the first drain 7.

[0087] Further, top filter plates 30 are installed at the uppermost parts of the first drain 7 and the second drain 8.

[0088] Further, a first valve 15.1 and a second valve 16.1 are respectively provided on the first pipe 15 and the second pipe 16.

[0089] Further, the longitudinal height of the position where the first water passing through hole 11.1 is provided is the same as that of the third pipe 22, and a third valve 22.1 is provided on the third pipe 22.

[0090] Further, both the first driving device 24 and the second driving device 18 are motor driving devices. The motor driving device includes a driving motor 33 and a speed reducer 34. The driving motor 33 is connected to the speed reducer 34, and the output shaft of the speed reducer 34 is connected to the threaded rod through a coupling.

[0091] Further, a water draining inclined plate 35 is provided on the upper parts of the first driving device 24 and the second driving device 18, and one side of the water draining inclined plate 35 is hinged to the drain body 2.

[0092] As Figure 5 shown, further, a liquid level sensor 36 is provided on the longitudinal overflow plate for sensing the drainage liquid level. The bridge drainage system further includes a PLC control device 37. The first valve 15.1, the second valve 16.1 and the third valve 22.1 are all solenoid valves. The PLC control device 37 is electrically connected to the first valve 15.1, the second valve 16.1 and the third valve 22.1. The first driving device 24 and the second driving device 18 are controlled by the PLC control device 37. The liquid level sensor 36 transmits a signal to the PLC control device 37, and the PLC control device 37 controls the actions of the first driving device 24 and the second driving device 18 and the opening and closing of the first valve 15.1, the second valve 16.1 and the third valve 22.1, so as to switch the drainage stage according to the rainfall.

[0093] On the other hand, the present invention provides a bridge drainage method, which includes the following three drainage stages:

[0094] Small rainfall drainage stage: Open the first valve 15.1 and close the second valve 16.1; Drive the first screw 25 to move the moving plate 26 to the lowest position, and the moving plate 26 contacts the second filter plate 17; Drive the second screw 19, and the sleeve 20 drives the blocking block 21 to the highest position and the upper moving block 23 to the lowest position. The rainwater does not cross the longitudinal overflow plate 9, and the rainwater flows to the second drainage ditch 8. Large impurities brought by the rainwater are filtered out by the top filter plate 30. The rainwater enters the second drainage ditch 8, passes through the longitudinal water passage opened on the transverse partition, and then passes through the first filter plate 14 from bottom to top for secondary filtration, and then flows out through the first pipe;

[0095] Large rainfall drainage stage: Close the first valve 15.1 and open the second valve 16.1; Drive the first screw 25 to move the moving plate 26 to the highest position, and the moving plate 26 contacts the limit block 27. Drive the second screw 19, and the sleeve 20 drives the blocking block 21 to the lowest position. The blocking block 21 blocks the longitudinal water passage, and the upper moving block 23 moves to the highest position. The first water outlet cavity 12 is communicated with the second water outlet cavity 13; The rainwater crosses the longitudinal overflow plate 9, and the rainwater flows to the first drainage ditch 7 and the second drainage ditch 8. Large impurities brought by the rainwater are filtered out by the top filter plate 30. Part of the rainwater enters the first drainage ditch 7, and the rainwater passes through the first filter plate 14 from top to bottom for secondary filtration, and then flows out through the second pipe 16; Another part of the rainwater enters the second drainage ditch 8, and the rainwater passes through the second filter plate 17 from bottom to top for secondary filtration, then passes through the first water outlet cavity 12 through the first water through hole 11.1 to the second water outlet cavity 13, and then flows out through the third pipe from the second water outlet cavity 13;

[0096] Switching stage from large rainfall drainage to small rainfall drainage: Close the third valve, drive the first screw 25, and the moving plate 26 moves downward. Drive the second screw 19, and the sleeve drives the blocking block 21 to move upward, and the upper moving block 23 moves downward. During this process, the water in the second water outlet cavity 13 passes through the first water through hole 11.1 to the first water outlet cavity 12. The moving plate 26 moves downward, and the rainwater passes through the second filter plate 17 from top to bottom. Part of the rainwater between the blocking block 21 and the upper moving block 23 passes through the longitudinal water passage, passes through the internal annular water passage and the water outlet passage inside the blocking block 21 to the first water outlet cavity 12.

[0097] The above has described the preferred embodiments of this patent in detail, but this patent is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art, various changes can be made without departing from the gist of this patent.

Claims

1. Bridge drainage system, characterized in that: A number of drainage units are respectively arranged on both sides of the bridge, and one drainage unit is arranged at intervals on the same side of the bridge; the drainage unit includes a drainage ditch body, the upper part of the drainage ditch body is longitudinally partitioned by a longitudinal partition wall into a first cavity and a second cavity, the first cavity is divided into a first drainage ditch and a second drainage ditch by a drainage-side longitudinal partition board, a longitudinal overflow board is installed on the upper part of the drainage-side longitudinal partition board, the first drainage ditches of all the drainage units on the same side of the bridge are interconnected, and the second drainage ditches of all the drainage units on the same side of the bridge are interconnected; a transverse partition board is fixed at the bottom of the drainage-side longitudinal partition board, the transverse partition board extends from the drainage-side longitudinal partition board to the side wall of the drainage ditch body towards the second cavity side, and a longitudinal water passage is opened on the transverse partition board; the second cavity is divided into a first water outlet cavity and a second water outlet cavity by a driving-side longitudinal partition board; a first filter board is installed at the bottom of the first drainage ditch, a first pipe is connected to the drainage ditch body above the first filter board, and a second pipe is connected to the drainage ditch body below the first filter board; a second filter board is installed inside the first water outlet cavity, a first water through hole is opened on the driving-side longitudinal partition board above the second filter board, and a second water through hole is opened on the driving-side longitudinal partition board below the second filter board; a second driving device is installed at the top inside the second water outlet cavity, the second driving device drives a second screw rod to rotate, a sleeve is threadedly connected to the second screw rod, the sleeve is fixedly connected with a blocking block, and the blocking block can move up and down inside the second water outlet cavity to block or connect the upper part and the lower part of the longitudinal water passage; the second water outlet cavity is connected to a third pipe; the characteristics are as follows: one end of the second screw rod is connected to the output shaft of the second driving device through a coupling, the second screw rod includes an upper thread part and a lower thread part with opposite helix directions, the sleeve is connected to the lower thread part, and the upper thread part is connected to an upper moving block; a number of longitudinal water passages inside the blocking block, an internal annular water passage and a water outlet passage inside the blocking block are opened on the blocking block, the longitudinal water passages inside the blocking block are longitudinally arranged from the upper end face and are connected to the internal annular water passage, when the blocking block reaches the highest position, the internal annular water passage is connected to the second water through hole through the water outlet passage inside the blocking block; a first driving device is installed at the top inside the first water outlet cavity, the output shaft of the first driving device is connected to a first screw rod, a moving plate is threadedly connected to the first screw rod, a limiting block is installed on the inner wall of the first water outlet cavity, and the moving plate can move between the second filter board and the limiting block under the drive of the first screw rod; a plurality of filter holes are arranged on the second filter board, and a brush corresponding to the position of the filter holes is arranged at the bottom of the moving plate; top filter boards are installed at the uppermost parts of the first drainage ditch and the second drainage ditch; a first valve and a second valve are respectively arranged on the first pipe and the second pipe; the longitudinal height of the position where the first water through hole is arranged is the same as that of the third pipe, and a third valve is arranged on the third pipe.

2. The bridge drainage system according to claim 1, wherein: Both the first driving device and the second driving device are motor driving devices. The motor driving device includes a driving motor and a speed reducer. The driving motor is connected to the speed reducer, and the output shaft of the speed reducer is connected to the threaded rod through a coupling. Drainage inclined plates are arranged on the upper parts of the first driving device and the second driving device, and one side of the drainage inclined plate is hinged to the main body of the drainage ditch.

3. Bridge drainage method, characterized in that: The bridge drainage system according to claim 1 or 2 comprises the following three drainage stages: Drainage stage for relatively small rainfall: Open the first valve and close the second valve. Drive the first screw rod to move the moving plate to the lowest position, and the moving plate contacts the second filter plate. Drive the second screw rod to drive the sleeve to move the blocking block to the highest position and the upper moving block to the lowest position. The rainwater does not cross the longitudinal overflow plate, and the rainwater flows into the second drainage ditch. Large impurities brought by the rainwater are filtered out by the top filter plate. The rainwater enters the second drainage ditch, flows through the longitudinal water passage opened on the transverse partition, and then passes through the first filter plate from bottom to top for secondary filtration, and then flows out through the first pipe. Drainage stage for relatively large rainfall: Close the first valve and open the second valve. Drive the first screw rod to move the moving plate to the highest position, and the moving plate contacts the limiting block. Drive the second screw rod to drive the sleeve to move the blocking block to the lowest position. The blocking block blocks the longitudinal water passage, and the upper moving block moves to the highest position. The first water outlet cavity is communicated with the second water outlet cavity. The rainwater crosses the longitudinal overflow plate, and the rainwater flows into the first drainage ditch and the second drainage ditch. Large impurities brought by the rainwater are filtered out by the top filter plate. Part of the rainwater enters the first drainage ditch, and the rainwater passes through the first filter plate from top to bottom for secondary filtration, and then flows out through the second pipe. Another part of the rainwater enters the second drainage ditch, and the rainwater passes through the second filter plate from bottom to top for secondary filtration, then passes through the first water outlet cavity through the first water through hole to the second water outlet cavity, and then flows out through the third pipe from the second water outlet cavity. Switching stage from relatively large rainfall drainage to relatively small rainfall drainage: Close the third valve. Drive the first screw rod to lower the moving plate, and drive the second screw rod to drive the sleeve to move the blocking block upward and the upper moving block downward. During this process, the water in the second water outlet cavity passes through the first water through hole to the first water outlet cavity. The moving plate moves downward, and the rainwater passes through the second filter plate from top to bottom. Part of the rainwater between the blocking block and the upper moving block passes through the longitudinal water passage, passes through the internal annular water passage and the water outlet passage inside the blocking block to the first water outlet cavity.

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