Bridge water supply and drainage system and method of use thereof

Abstract

This invention discloses a bridge water supply and drainage system, including a filter screen and a drainage tank. A scraper plate is located at the bottom of the filter screen within the cavity of the drainage tank. Multiple scraper columns are evenly distributed on the top of the scraper plate, with some columns having sealing plates on their tops. An inclined guide plate is located below the scraper plate within the drainage tank cavity. A flow inlet is located at the lowest point of the guide plate, and a rotating shaft is located below the guide plate. An "L"-shaped lever device with the rotating shaft as a fulcrum is located at the bottom of the scraper plate. One end of the "L"-shaped lever device abuts against the bottom of the scraper plate, and the other end has a water collection frame located below the flow inlet. When the water collection frame is unloaded, the product of the lever arm and its own weight at the end of the "L"-shaped lever device closest to the scraper plate is not less than the product of the water collection frame's own weight and lever arm. This invention also discloses a method for using the bridge water supply and drainage system. This invention solves the technical problems of existing drainage ditch filters being easily clogged, having a low safety factor during dredging, and poor performance, and can be widely applied in municipal engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of municipal facilities, in particular to a bridge water supply and drainage system and a use method thereof. BACKGROUND

[0002] In order to quickly remove the water on the bridge deck, prevent rainwater from accumulating on the bridge deck and seeping into the beam to affect the durability of the bridge, in the design of the bridge, in addition to setting up longitudinal and transverse slope drainage on the bridge deck, a certain number of water spout pipes need to be set up on the bridge deck to form a complete drainage system. The type of water spout pipe generally includes metal water spout pipe, reinforced concrete water spout pipe, and transverse drainage pipe. The bridge deck drainage system should be provided with longitudinal and transverse slopes and water spouts to reduce the water on the bridge deck and achieve the purpose of prevention and drainage combination.

[0003] The existing bridge deck drainage structure is generally side drainage, and rainwater is directly lowered through both sides of the bridge deck, or a drainage channel connected to the sewer is arranged on both sides of the bridge deck. When in use, rainwater flows to both sides and enters the drainage channel and finally enters the sewer.

[0004] However, when the car is driving in the rain, the mud adhered to the wheels and the dust deposited on the car body will be washed by the rain and fall on the bridge deck. During drainage, rainwater will carry dust deposited on the bridge deck into the drainage channel. When the amount of rain and drainage is small, it is difficult to completely carry the dust into the sewer, resulting in the deposition of dust in the drainage channel. The leaves blown by the wind on the bridge deck are mutually reinforced, causing the sewer inlet to be blocked, and the dust will combine with water inside to form sludge.

[0005] Currently, when the wellhead of the sewer is blocked, the well cover is generally opened by artificial timing, and the sludge is taken out and transported to the dumping position by using a shovel or other tools. The use of artificial cost is high, and the drainage channel on the bridge deck is generally located on both sides. Workers may have the risk of falling when working, and the safety factor is low due to the large number of vehicles on the bridge deck. In order to prevent frequent blockage, the mesh of the filter screen of the sewer is generally large, and the fallen leaves on the bridge deck can enter the sewer pipe through the filter screen. The leaves are easily blocked in the pipe when there is no water flow to wash them in the dry season, and the use effect is poor. SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the background art, provide a bridge water supply and drainage system and a use method thereof, which can solve the technical problems of the existing drainage channel filter screen being easily blocked, the low safety factor during dredging, and the poor use effect.

[0007] The application provides a bridge water supply and drainage system, which comprises a filter screen and a sewer tank located at the bottom of the filter screen, the bottom of the filter screen is provided with a scraper column plate located in the cavity of the sewer tank and arranged in parallel with the filter screen, the top of the scraper column plate is uniformly provided with a plurality of scrapers corresponding to the mesh holes of the filter screen, the top of part of the scrapers is provided with a sealing plate matched with the corresponding mesh hole, the scraper column plate is provided with a water leakage hole between each scraper, the inner cavity of the sewer tank is provided with a guide plate located below the scraper column plate and arranged obliquely, the lowest part of the guide plate is provided with a drainage port, the lower part of the guide plate is provided with a rotating shaft fixed to the inner wall of the sewer tank, the bottom of the scraper column plate is provided with an L-shaped lever device taking the rotating shaft as a fulcrum, wherein one end of the L-shaped lever device abuts against the bottom of the scraper column plate, and the other end of the L-shaped lever device is provided with a water collecting frame located below the drainage port, when the water collecting frame is empty, the product of the force arm of the end of the L-shaped lever device close to the scraper column plate and the weight is not less than the product of the weight and the force arm of the water collecting frame.

[0008] In the technical scheme, the sealing plate side wall and the filter screen mesh hole inner side wall are gap matched.

[0009] In the technical scheme, when the sealing plate seals the filter screen mesh hole, the bottom of the sealing plate is higher than the bottom of the filter screen mesh hole, and the top of the scraper in the bottom of the sealing plate extends into the filter screen mesh hole.

[0010] In the technical scheme, the guide plate is composed of three parts, the drainage ports on both sides of the guide plate are respectively provided with guide branch plates connected with the lowest parts, and the highest parts of the two guide branch plates are located at the ends away from the drainage ports.

[0011] In the technical scheme, one of the guide branch plates of the guide plate is provided with a shunt plate, one end of the shunt plate is connected with a section of the guide branch plate through a rotating shaft, the other end of the shunt plate is attached to another section of the guide branch plate, a torsional spring is arranged on the rotating shaft, and the two ends of the torsional spring are respectively connected with the shunt plate and the guide branch plate.

[0012] In the technical scheme, the rotating shaft is located on the highest end of the shunt plate.

[0013] In the technical scheme, the inner cavity bottom of the sewer tank is provided with a vibrating bottom plate, the vibrating bottom plate is gap matched with the inner side wall of the sewer tank in the circumferential direction and is placed on the bottom of the sewer tank, the bottom of the end of the L-shaped lever device abutting against the scraper column plate is provided with a striking device, the bottom of the striking device is connected with one end of the vibrating bottom plate, the top of the striking device is abutted against the L-shaped lever device, the lowest part of the inner cavity of the sewer tank is provided with a water outlet pipe connected with a drainage pipe, and the water outlet pipe penetrates through the vibrating bottom plate.

[0014] In the above technical solution, multiple vibration springs are evenly distributed between the bottom of the inner cavity of the lower water tank and the vibrating base plate, arranged sequentially along the axial direction of the inner cavity of the lower water tank. Each vibration spring is arranged along the axial cross section of the inner cavity of the lower water tank. A corresponding hanging ring is provided on both sides of the bottom of the inner cavity of the lower water tank. Both ends of each vibration spring are connected to the corresponding hanging ring. The distance between the corresponding hanging rings is greater than the original length of each vibration spring. An elastic waterproof cloth is provided on the vibrating base plate, which is circumferentially sealed to the side wall of the inner cavity of the lower water tank. The hole in the middle of the elastic waterproof cloth is circumferentially sealed to the inlet of the water outlet pipe.

[0015] In the above technical solution, a cleaning door is provided at one end of the water tank, and mounting plates for fixing the water tank to the drain trough are provided at both ends of the top of the water tank. A rotating pin is provided at one end of the filter screen to hinge the filter screen to the top of the water tank, and a movable buckle is provided at the other end of the filter screen to movably connect the filter screen to the top of the water tank. An operating hole is provided on the top of the water tank on one side of the movable buckle.

[0016] This invention also provides a method for using a bridge water supply and drainage system, with the following specific operating steps: Step 1: Fix the drainage trough on both sides of the bridge deck, and use fastening bolts to fix the drainage tank to the bottom of the drainage trough through the mounting plate; Step 2: After rainwater flows into the drainage trough, it will be guided by the drainage trough to flow through the mesh of the filter screen that is not sealed by the sealing plate into the drainage tank; Step 3: The water entering the drainage tank is guided by the guide plate into the water collection frame, and the water collection frame is pressed down, causing the "L"-shaped lever device to rotate and push the scraper plate to rise, causing the sealing plate to detach from the filter screen, opening all the mesh holes and improving drainage efficiency. When the weight of the water deposited in the water collection frame and the product of its lever arm exceed the weight of the other end of the "L"-shaped lever device and its lever arm, the "L"-shaped lever device will rotate, causing the scraper plate to move in an arc shape, so that the scraper on the scraper plate is fully inserted into the mesh of the filter screen to clean the filter screen, and at the same time, the water in the water collection frame will be poured out. Step 4: When the rainfall is too heavy and the guide plate cannot drain the rainwater quickly, the rainwater accumulates on the guide plate until it rises to the diversion plate. When the product of the rainwater pressure and its lever arm is greater than the product of the torsion spring on the diversion plate and its lever arm, the diversion plate will be pressed down and opened, allowing the rainwater to fall directly into the drain tank for discharge. Step 5: After the water in the collection frame is emptied, the weight of the "L"-shaped lever device near the scraper plate and its lever arm again exceeds the weight of the collection frame and its lever arm. The "L"-shaped lever device quickly reverses and resets. When the "L"-shaped lever device resets, it strikes the device, causing the vibrating base plate to vibrate and loosening the dust deposited on the bottom surface of the vibrating base plate. Step 6: The loosened dust is carried out by the rainwater through the drain pipe. Step 7: When it is not raining, the rainwater remaining in the collection frame slowly evaporates, causing the "L"-shaped lever device to rotate completely back to its original position, and the sealing plate seals the mesh again.

[0017] The bridge water supply and drainage system and its usage method of the present invention have the following beneficial effects:

[0018] 1. This invention involves installing a water collection frame and a scraper plate connected by an "L"-shaped lever device inside the water tank. During rain, the water is collected in the water collection frame by a guide plate. This causes the product of the weight of one end of the water collection frame and its lever arm to be greater than the product of the weight of one end of the scraper plate and its lever arm. This causes the "L"-shaped lever device to rotate, resulting in the scraper plate moving upward and towards the filter screen openings at one end in an arc shape. This cleans the filter screen openings and prevents the filter screen from being clogged by the accumulation of leaves and dust, thus providing a good anti-clogging effect.

[0019] 2. This invention features a vibrating base plate installed inside the lower water tank. A striking device, which works in conjunction with an "L"-shaped lever, is mounted on the vibrating base plate. When the water collection frame rotates, it pours out water. After the water is poured out, the weight of one end of the water collection frame and the product of its lever arm become less than the weight of one end of the scraper plate and its lever arm, causing the "L"-shaped lever to reset and strike the striking device against the vibrating base plate. The strong scouring force generated by the water poured out of the water collection frame, combined with the striking action of the "L"-shaped lever during reset, prevents dust from accumulating on the vibrating base plate, resulting in excellent sludge removal without the need for manual intervention.

[0020] 3. This invention connects a sealing plate that works with the filter screen to part of the scraper blade to prevent leaves from entering the drain tank and clogging the drain pipe when there is no water. Only one row of filter screen holes is left unsealed to handle situations with light rainfall. When it rains, rainwater enters the water collection frame through the remaining filter screen holes. Pressing down the "L"-shaped lever device causes the scraper blade to rise, and the sealing plate disengages from the filter screen, opening all the mesh holes and improving drainage efficiency. When the water collection frame is full and tilted, some water cannot be poured out. Pressing down the "L"-shaped lever device keeps the sealing plate open. When there is no rain for a long time, the residual water in the water collection frame slowly evaporates, causing the sealing plate to reseal the filter screen. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall external structure of the bridge water supply and drainage system of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the bridge water supply and drainage system of the present invention.

[0023] Figure 3 This is a detailed internal structural diagram of the bridge water supply and drainage system of the present invention;

[0024] Figure 4 This is a bottom axonometric view of the structure of the scraper plate and filter screen in the bridge water supply and drainage system of the present invention;

[0025] Figure 5This is a top axonometric view of the structure of the scraper plate and filter screen in the bridge water supply and drainage system of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the drainage trough and retaining column in the bridge water supply and drainage system of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection between the filter screen and the lower water tank in the bridge water supply and drainage system of the present invention;

[0028] Figure 8 This is a flowchart illustrating the method of using the bridge water supply and drainage system of the present invention. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0030] See Figures 1 to 3 The present invention relates to a bridge water supply and drainage system, which is installed at the bottom of a drainage trough 1. When it rains, rainwater flows to both sides of the bridge deck and enters the drainage trough 1. A drainage tank 2 is connected to the middle of the bottom surface of the drainage trough 1. A filter screen 3 is hinged to the top surface of the drainage tank 2 via a rotating pin 20. The rainwater entering the drainage trough 1 is guided through the filter screen 3, which is not sealed by the sealing plate 19 at this time, and flows into the drainage tank 2. The drainage tank 2 is equipped with a rotating shaft 22 and an "L"-shaped lever device 7 hinged to the rotating shaft 22. One end of the "L"-shaped lever device 7 is connected to a water collection frame 8. The drainage tank 2 is equipped with a guide plate 5 that cooperates with the water collection frame 8. The guide plate 5 consists of three parts. The lowest point of the guide plate 5 is provided with a flow outlet 23. On both sides of the flow outlet 23, there are guide support plates connected to the lowest point. The highest point of the two guide support plates is located at the end away from the flow outlet 23. Water entering the lower water tank 2 is guided by the guide plate 5 into the water collection frame 8. Pressing down on the water collection frame 8 causes the "L"-shaped lever device 7 to rotate. The other end of the "L"-shaped lever device 7 is connected to a scraper plate 9, and the top surface of the lower water tank 2 is connected to the scraper plate 9 and a filter screen 3 with waist-shaped holes is connected by a pin. See [link / reference]. Figures 4 to 5The top of the scraper plate 9 is evenly distributed with multiple scraper columns 21 that correspond one-to-one with the mesh openings of the filter screen 3. The scraper plate 9 is provided with drainage holes between each scraper column 21. The top surface of the scraper column 21 is connected to a sealing plate 19 that cooperates with the filter screen 3, and the number of sealing plates 19 is one row less than the mesh openings of the filter screen 3. The L-shaped lever device 7 rotates and pushes the scraper plate 9 to rise, so that the sealing plate 19 is separated from the filter screen 3, all the mesh openings are opened, and the drainage efficiency is improved. When the weight of the water deposited in the water collection frame 8 and the product of its lever arm exceed the weight of the other end of the L-shaped lever device 7 and its lever arm, the water collection frame 8 drives the L-shaped lever device 7 to rotate and pour out the water in the water collection frame 8. At this time, some rainwater will remain and not be completely poured out. When the L-shaped lever device 7 rotates, it will drive the scraper plate 9 to make an arc-shaped movement. The scraper columns 21 of the scraper plate 9 are inserted into the mesh openings of the filter screen 3 to clean the mesh openings of the filter screen 3 from one end to the other to prevent clogging.

[0031] See Figures 2 to 3 A vibrating base plate 10 is connected to the bottom surface of the lower water tank 2, and a striking device 14 is connected to one end of the top surface of the vibrating base plate 10. The striking device 14 engages with one end of the scraper plate 9 connected to the "L"-shaped lever device 7. After the water in the water collection frame 8 is poured out, the product of the weight of the scraper plate 9 at one end of the "L"-shaped lever device 7 and its lever arm exceeds the product of the weight of the water collection frame 8 at one end and its lever arm again. The "L"-shaped lever device 7 quickly reverses and resets. The inertia of the "L"-shaped lever device 7 during reset will cause it to strike the striking device 14. The periphery of the vibrating base plate 10 is fitted with the inner wall of the lower water tank 2 with a clearance, and the bottom of the vibrating base plate 10 rests on the bottom of the lower water tank 2, making... The vibrating base plate 10 can move on the lower water tank 2 and can vibrate up and down in conjunction with the striking device 14, causing the vibrating base plate 10 to vibrate and loosen the dust clumps deposited on the bottom surface of the vibrating base plate 10. The bottom surface of the lower water tank 2 is connected to the drain pipe 15, and the water poured out by the water collection frame 8 can wash the dust loosened by the last impact to the drain pipe 15 for discharge. After the rain stops, the rainwater remaining in the water collection frame 8 will cause the "L"-shaped lever device 7 to not completely reset. At this time, the sealing plate 19 does not contact the mesh of the filter screen 3 to seal, so that the residual rainwater can be discharged quickly. Subsequently, the residual rainwater will slowly evaporate, causing the "L"-shaped lever device 7 to completely reset, and the sealing plate 19 will seal the filter screen 3 again.

[0032] The lower water tank 2 has corresponding hanging rings on both sides of its inner bottom. Vibration springs 11 are hooked between the corresponding hanging rings of the vibrating base plate 10 and the lower water tank 2 via hooks. Multiple vibration springs 11 are evenly distributed at the bottom of the lower water tank 2. The vibration springs 11 are stretched by the hooks to support the vibrating base plate 10, reducing the deformation of the vibrating base plate 10 and improving its service life. Elastic waterproof cloth 12 connected to the inner wall of the lower water tank 2 is installed on all four sides of the top surface of the vibrating base plate 10. A drain pipe 15 is connected to the lowest point of the bottom surface of the vibrating base plate 10. Pipe 13, the central hole of the elastic waterproof cloth 12 is sealed to the inlet of the water outlet pipe 13 along the circumferential direction. The elastic waterproof cloth 12 can adapt to the vibration of the vibrating base plate 10. It works with the water outlet pipe 13 to prevent rainwater from carrying dust into the gap between the vibrating base plate 10 and the lower water tank 2, which would affect the vibration spring 11. The connection between the water outlet pipe 13 and the vibrating base plate 10 is funnel-shaped so that rainwater and dust can be completely discharged. The weight and lever arm of the "L"-shaped lever device 7 near the scraper plate 9 under normal conditions are higher than the product of the weight and lever arm of the unloaded water collection frame 8.

[0033] Based on the above structure, in this embodiment, there is a certain gap between the side of the sealing plate 19 and the filter screen 3 to prevent dust from combining with moisture to form mud that would stick the sealing plate 19 and the filter screen 3 together. The bottom end of the sealing plate 19 extends into the mesh of the filter screen 3 by one end, that is, the bottom of the sealing plate 19 is higher than the bottom of the mesh of the filter screen 3. This allows the sealing plate 19 to work with the filter screen 3 to generate a shearing force when it is fully reset, cutting off the leaves that are located between the sealing plate 19 and the filter screen 3 at this time, thus preventing them from affecting the operation of the sealing plate 19.

[0034] See Figure 3 Based on the above structure, in this embodiment, both ends of the water tank 2 are provided with mounting plates 4. During installation, fixing bolts are used to pass through the mounting plates 4 to fix the water tank 2 to the water trough 1.

[0035] When the rainfall is light, the rainwater is drained quickly. To prevent the rainwater from overflowing due to insufficient drainage when the rainfall is heavy, a diversion plate 6 is connected to one of the guide plates of the guide plate 5 via a rotating shaft. A torsion spring is installed on the rotating shaft of the diversion plate 6. The torsion spring makes the diversion plate 6 fit with the guide plate 5. When the rainfall is too heavy and the guide plate 5 has difficulty draining the rainwater quickly, the rainwater accumulates on the guide plate 5 until it rises to the diversion plate 6. When the pressure of the rainwater on the diversion plate 6 is greater than the torsion of the torsion spring, the diversion plate 6 will be pressed down and opened, allowing the rainwater to fall directly into the drain tank 2 for discharge.

[0036] To improve the effectiveness of the diversion plate 6, the pivot of the diversion plate 6 is located at the highest point of the diversion plate 6, so that rainwater can be pushed down to open the diversion plate 6 without accumulating too much, and the diversion plate 6 can drain water quickly with only a small rotation angle.

[0037] See Figure 6 Based on the above structure, in this embodiment, multiple baffles 17 are provided on the top surface of the drain trough 1 to prevent the wheels from falling into the drain trough 1 and getting stuck. See [link to relevant documentation]. Figure 7 Furthermore, the movable end of the filter screen 3 is provided with a movable buckle 16 that cooperates with the slot and operation hole 24 on the inner top surface of the lower water tank 2, so as to fix the filter screen 3. When the movable buckle 16 is rotated to disengage from the filter screen 3, the filter screen 3 can be rotated to open, so as to clean the water collection frame 8.

[0038] Based on the above structure, in this embodiment, a cleaning door 18 is connected to one end of the water tank 2 by a pin, which facilitates the maintenance, replacement and cleaning of the inside of the water tank 2.

[0039] See Figure 8 In use, drainage troughs 1 are installed on both sides of the bridge deck. The drainage tank 2 is fixed to the bottom center of the drainage trough 1 using fixing bolts and mounting plate 4. The filter screen 3 is covered, and the movable buckle 16 is rotated to lock the filter screen 3. The drain pipe 15 is connected to the sewer to complete the installation. When it rains, rainwater flows to both sides of the bridge deck and enters the drainage trough 1. The rainwater entering the drainage trough 1 passes through the mesh of the filter screen 3 that is not sealed by the sealing plate 19 and enters the drainage tank 2. The water entering the drainage tank 2 is guided by the guide plate 5 and enters the water collection frame 8. The downward pressure on the water collection frame 8 causes the "L"-shaped lever device 7 to rotate, pushing the scraper plate 9 upward. The sealing plate 19 disengages from the filter screen 3, opening all the mesh openings and improving drainage efficiency. When the weight of the water deposited in the water collection frame 8 and the product of its lever arm exceed the weight of the end of the "L"-shaped lever device 7 near the scraper plate 9 and its lever arm, the "L"-shaped lever device 7 rotates, thereby moving the scraper plate 9 to clean the mesh openings of the filter screen 3 and prevent clogging. The downward rotation of the water collection frame 8 pours out the water, rinsing the vibrating base plate 10. At this time, some rainwater will remain in the water collection frame 8. After the water in the water collection frame 8 is poured out, the product of the weight of the end of the "L"-shaped lever device 7 near the scraper plate 9 and its lever arm will again exceed the product of the weight of the end of the water collection frame 8 and its lever arm. The "L"-shaped lever device 7 will quickly reverse and reset. The inertia of the "L"-shaped lever device 7 during reset will cause the "L"-shaped lever device 7 to hit the striking device 14, causing the vibrating base plate 10 to vibrate. This will loosen the dust clumps deposited on the bottom surface of the vibrating base plate 10. When the rainfall is too heavy, the guide plate 5 will be difficult to... When rainwater is quickly discharged, it accumulates on the guide plate 5 until it rises to the diversion plate 6. The pressure of the rainwater can push the diversion plate 6 down and open it, allowing the rainwater to fall directly into the drain tank 2 for discharge. After the rain stops, the rainwater remaining in the collection frame 8 will cause the "L"-shaped lever device 7 to not fully reset. At this time, the sealing plate 19 does not contact the filter screen 3 to seal, so that the remaining rainwater can be discharged quickly. Subsequently, the remaining rainwater will slowly evaporate, causing the "L"-shaped lever device 7 to fully reset, and the sealing plate 19 will seal the filter screen 3 again.

[0040] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0041] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A bridge water supply and drainage system, comprising a filter screen (3) and a drain tank (2) located at the bottom of the filter screen (3), characterized in that: The bottom of the filter screen (3) is provided with a scraper plate (9) located inside the cavity of the lower water tank (2) and parallel to the filter screen (3). The top of the scraper plate (9) is evenly distributed with multiple scraper columns (21) that correspond one-to-one with the mesh holes of the filter screen (3). Some of the scraper columns (21) are provided with sealing plates (19) that cooperate with the corresponding mesh holes. The scraper plate (9) is provided with water leakage holes between each scraper column (21). The inner cavity of the lower water tank (2) is provided with a guide plate (5) that is inclined and located below the scraper plate (9). The lowest point of the guide plate (5) is provided with a drain port (23). The bottom of the guide plate (5) is provided with a rotating shaft (22) fixed to the inner wall of the lower water tank (2). The bottom of the scraper plate (9) is provided with a rotating shaft. The "L"-shaped lever device (7) with shaft (22) as the fulcrum has one end abutting the bottom of scraper plate (9) and the other end is provided with a water collection frame (8) located below the drain port (23). When the water collection frame (8) is unloaded, the product of the lever arm and the weight of the end of the "L"-shaped lever device (7) near the scraper plate (9) is not less than the product of the weight and the lever arm of the water collection frame (8). The sealing plate (19) seals the corresponding mesh hole that it cooperates with. The water entering the lower water tank (2) is guided into the water collection frame (8) through the guide plate (5). The water collection frame (8) is pressed down, so that the "L"-shaped lever device (7) rotates and pushes the scraper plate (9) to rise, so that the sealing plate (19) is separated from the filter screen (3).

2. The bridge water supply and drainage system according to claim 1, characterized in that: The side wall of the sealing plate (19) is fitted with the inner side wall of the mesh of the filter screen (3) with a clearance.

3. The bridge water supply and drainage system according to claim 2, characterized in that: When the sealing plate (19) seals the mesh of the filter screen (3), the bottom of the sealing plate (19) is higher than the bottom of the mesh of the filter screen (3), and the top of the scraper (21) at the bottom of the sealing plate (19) extends into the mesh of the filter screen (3).

4. The bridge water supply and drainage system according to claim 3, characterized in that: The guide plate (5) consists of three parts. The two sides of the flow inlet (23) are respectively provided with guide plates connected to the lowest point. The highest point of the two guide plates is located at the end away from the flow inlet (23).

5. The bridge water supply and drainage system according to claim 4, characterized in that: A flow divider (6) is provided on one of the flow guides (5). One end of the flow divider (6) is connected to a section of the flow guide through a rotating shaft. The other end of the flow divider (6) is in contact with another section of the flow guide. A torsion spring is provided on the rotating shaft. The two ends of the torsion spring are connected to the flow divider (6) and the flow guide respectively.

6. The bridge water supply and drainage system according to claim 5, characterized in that: The rotating shaft is located at the highest end of the splitter plate (6).

7. The bridge water supply and drainage system according to claim 6, characterized in that: The bottom of the inner cavity of the lower water tank (2) is provided with a vibrating base plate (10). The vibrating base plate (10) is circumferentially fitted with the inner side wall of the lower water tank (2) and the bottom of the vibrating base plate (10) rests on the bottom of the lower water tank (2). The bottom of the "L"-shaped lever device (7) that abuts against the scraper plate (9) is provided with a striking device (14). The bottom of the striking device (14) is connected to one end of the vibrating base plate (10). The top of the striking device (14) abuts against the "L"-shaped lever device (7). The lowest point of the inner cavity of the lower water tank (2) is provided with a water outlet pipe (13) connected to the drain pipe (15). The water outlet pipe (13) passes through the vibrating base plate (10).

8. The bridge water supply and drainage system according to claim 7, characterized in that: The drain tank (2) is provided with a cleaning door (18) at one end. The drain tank (2) is provided with mounting plates (4) at both ends of the top of the drain tank (2) to fix the drain tank (2) to the drain trough (1). The filter screen (3) is provided with a rotating pin (20) at one end to hinge the filter screen (3) to the top of the drain tank (2). The filter screen (3) is provided with a movable buckle (16) at the other end to movably connect the filter screen (3) to the top of the drain tank (2). The drain tank (2) is provided with an operation hole (24) on the top of the drain tank (2) on one side of the movable buckle (16).

9. A method of using the bridge water supply and drainage system according to claim 8, characterized in that: The specific operating steps are as follows: Step 1: Fix the drainage trough (1) on both sides of the bridge deck, and use fastening bolts to fix the drainage tank (2) to the bottom surface of the drainage trough (1) through the mounting plate (4); Step 2: After the rainwater flows into the drain trough (1), it will be guided by the drain trough (1) to flow into the drain tank (2) through the mesh holes on the filter screen (3) that are not sealed by the sealing plate (19). Step 3: The water entering the lower water tank (2) is guided into the water collection frame (8) through the guide plate (5). The water collection frame (8) is pressed down, causing the "L"-shaped lever device (7) to rotate and push the scraper plate (9) to rise, so that the sealing plate (19) is separated from the filter screen (3), and all the mesh holes are opened to improve drainage efficiency. When the weight of the water deposited in the water collection frame (8) and the product of its lever arm exceed the weight of the other end of the "L"-shaped lever device (7) and its lever arm, the "L"-shaped lever device (7) will rotate, so that the scraper plate (9) will move in an arc shape, so that the scraper (21) on the scraper plate (9) is fully inserted into the mesh hole of the filter screen (3) to clean the filter screen (3), and at the same time, the water in the water collection frame (8) is poured out. At this time, some rainwater is not completely poured out. Step 4: When the rainfall is too heavy and the guide plate (5) cannot discharge the rainwater quickly, the rainwater accumulates on the guide plate (5) until it rises to the diversion plate (6). When the product of the pressure of the rainwater and its lever arm is greater than the product of the torque of the torsion spring on the diversion plate (6) and its lever arm, the diversion plate (6) will be pressed down and opened, so that the rainwater falls directly into the drain tank (2) and is discharged. Step 5: After the water in the water collection frame (8) is poured out, the weight of the "L"-shaped lever device (7) near the scraper plate (9) and its lever arm product again exceed the weight of the water collection frame (8) and its lever arm product. The "L"-shaped lever device (7) quickly reverses and resets. When the "L"-shaped lever device (7) resets, it hits the striking device (14), causing the vibrating base plate (10) to vibrate, which loosens the dust deposited on the bottom surface of the vibrating base plate (10). Step 6: Loose dust is carried by rainwater and discharged through the drain pipe (15); Step 7: When it is not raining, the rainwater remaining in the water collection frame (8) evaporates slowly, causing the "L"-shaped lever device (7) to rotate back to its original position, and the sealing plate (19) seals the mesh again.

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