CN116479985A - Road Bridge Drainage Structure - Google Patents

Abstract

The invention provides a road and bridge drainage structure, which belongs to the technical field of roads and bridges, and includes a main well and an auxiliary well; the lower part of the main well is provided with a screening base, and the screening base divides the main well into a screening chamber and a flow chamber; the upper end of the screening base is provided with an inner cylinder and an outer cylinder, and a plurality of flow holes are arranged at circumferential intervals of the inner cylinder; an annular buffer zone is provided on the outer side of the outer cylinder; The liquid chamber is connected to the flow chamber by means of the drain hole; the crushing cutter is arranged in the crushing chamber. The drainage structure for roads and bridges provided by the present invention separates impurities from clean rainwater through the screening chamber to relieve the drainage pressure, and then discharges the impurities in the screening chamber to the crushing chamber of the auxiliary shaft for crushing and cutting, reducing the possibility of rainwater blockage; the arrangement of the inner cylinder and the outer cylinder allows impurities to enter the crushing chamber for crushing after a certain amount, saving energy consumption.

Description

Road Bridge Drainage Structure

technical field

The invention belongs to the technical field of roads and bridges, and more specifically relates to a drainage structure for roads and bridges.

Background technique

Roads and bridges are an integral part of people's lives. Roads provide people with convenient transportation and can reach a certain place more quickly. Bridges are a kind of traffic road that can span between two regions, which is more convenient to improve transportation. After the road bridge is built, it needs a drainage pipe, which can drain the accumulated water on the road bridge.

Contents of the invention

The purpose of the present invention is to provide a drainage structure for road bridges, aiming at solving the problem that drainage pipes do not have the function of preventing clogging.

In order to achieve the above object, the technical solution adopted in the present invention is: provide a road bridge drainage structure, comprising a main well and an auxiliary well, the top cover of the main well is provided with rainwater holes; the bottom of the main well is provided with a screening base with drainage holes, and the screening base divides the main well into a screening chamber and a flow chamber; An annular buffer zone; the auxiliary well is provided with a filter plate, and the filter plate divides the inner cavity of the auxiliary well into a crushing chamber and a liquid discharge chamber, and the crushing chamber is connected to the buffer zone of the screening chamber by a drain hole, and the liquid discharge chamber is connected to the flow chamber by a liquid discharge hole; a crushing cutter is provided in the crushing chamber, and the crushing cutter includes a rotating shaft and a cutting blade arranged in the circumferential direction of the rotating shaft.

As another embodiment of the present application, the screening base is conical, and the edge of the screening base is provided with a downwardly recessed sewage discharge groove, the sewage discharge groove is located outside the outer cylinder and the sewage discharge groove is connected to the sewage discharge hole.

As another embodiment of the present application, the side of the sewage discharge tank close to the sewage discharge hole is lower than the side of the sewage discharge tank away from the sewage discharge hole.

As another embodiment of the present application, a primary crushing assembly is provided in the screening chamber, and the primary crushing assembly includes a rotating shaft arranged along the axial direction of the main well, and a rotating disk arranged on the rotating shaft; the rotating disk includes a fixed ring and a plurality of fan-shaped blades evenly fixed on the inside of the fixed ring, and a flow channel is formed between two adjacent fan-shaped blades.

As another embodiment of the present application, the front ends of the fan-shaped blades have blades, and the upper ends of the fan-shaped blades have crushing spikes; the crushing spikes face the upper end, and the ends of the crushing spikes are attached to the lower end of the top cover.

As another embodiment of the present application, the lower part of the outer cylinder is also provided with a through hole matching the flow hole, and the upper part of the outer cylinder is connected with a rotation drive assembly, and the rotation drive assembly is used to drive the outer cylinder to rotate horizontally to drive the through hole to communicate with or cover the flow hole.

As another embodiment of the present application, the rotary drive assembly includes a linkage gear set, a linkage gear sleeve and a return torsion spring;

The linkage gear set includes a gear ring, a linkage shaft, a first gear, and a second gear; the gear ring is sleeved in the circumferential direction of the fixed ring; the linkage shaft is rotatably connected to the well wall of the main shaft, the first gear and the second gear are both sleeved on the linkage shaft, and the first gear meshes with the gear ring; the second gear is located below the first gear; the second gear includes a tooth portion and a smooth portion;

The linkage gear sleeve includes a connecting ring and an arc-shaped rack, the connecting ring is set in the circumferential direction of the outer cylinder, the arc-shaped rack is set on the outside of the arc-shaped rack, the central angle of the arc-shaped rack is less than 45°, and the arc-shaped rack meshes with the teeth of the second gear;

The return torsion spring is sleeved on the outside of the linkage shaft, one end of the return torsion spring is fixedly connected to the well wall of the main shaft, and the other end of the return torsion spring is fixedly connected to the wall of the outer cylinder.

As another embodiment of the present application, there are two arc-shaped racks, and the two arc-shaped racks are symmetrically arranged on the connecting ring; the central angle of the arc-shaped racks is 30°.

As another embodiment of the present application, a communicating chamber is provided between the main well and the auxiliary well, and a conducting assembly is provided in the communicating chamber, and the conducting assembly connects the rotating drive assembly and the rotating shaft to drive the rotating shaft to rotate; the conducting assembly includes a transmission gear and a driven gear, the transmission gear is rotatably connected in the communicating chamber, and the driven gear is sleeved on the rotating shaft; the transmission gear meshes with the first gear and the driven gear simultaneously.

As another embodiment of the present application, the top of the inner cylinder is provided with a receiving ring, and the edge of the receiving ring is attached to the inner side wall of the main well; the lower end of the receiving ring is provided with an arc-shaped connecting groove, and the upper end of the outer cylinder is slidably connected in the arc-shaped connecting groove.

The beneficial effects of the road and bridge drainage structure provided by the present invention are: compared with the prior art, the road and bridge drainage structure of the present invention sets the main well and the auxiliary well, and divides the main well and the auxiliary well into upper and lower areas, and separates the impurities from the clean rainwater through the screening chamber to relieve the drainage pressure, and then discharges the impurities in the screening chamber into the crushing chamber of the auxiliary well for crushing and cutting. The screening chamber and the crushing chamber are intermittently connected, so that the impurities enter the crushing chamber after a certain amount, which improves the crushing efficiency and saves energy consumption.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings used in the embodiments or prior art descriptions. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings without creative work.

Fig. 1 is the structural representation of the road bridge drainage structure that the first embodiment of the present invention provides;

Fig. 2 is a schematic structural diagram of the linkage gear sleeve provided by the embodiment of the present invention;

Fig. 3 is a structural schematic diagram of a top cover provided by an embodiment of the present invention;

Figure 4 is a schematic structural view of the primary crushing assembly provided by the embodiment of the present invention;

Fig. 5 is a structural schematic diagram of a road bridge drainage structure provided by the second embodiment of the present invention.

In the figure: 1, main well; 2, top cover; 3, rainwater hole; 4, rotating shaft; 5, fan-shaped blade; 6, broken spikes; 7, fixed ring; 8, tooth ring; 9, first gear; 10, linkage shaft; 11, second gear; 12, reset torsion spring; Rod; 21, screening base; 22, sewage tank; 23, drainage hole; 24, liquid drainage hole; 25, sewage drainage hole; 26, filter plate; 27, rotating shaft; 28, cutting blade; 29, transmission gear; 30, passive gear.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 to Fig. 5, the road bridge drainage structure provided by the present invention will now be described. The road and bridge drainage structure includes a main well 1 and an auxiliary well. The top cover 2 of the main well 1 is provided with a rainwater hole 3; the bottom of the main well 1 is provided with a screening base 21 with a drainage hole 23, and the screening base 21 divides the main well 1 into a screening chamber and a flow chamber; The outer side of 17 has an annular buffer zone; the auxiliary well is provided with a filter plate 26, and the filter plate 26 divides the inner cavity of the auxiliary well into a crushing chamber and a drainage chamber, the crushing chamber is connected to the buffer zone of the screening chamber by means of the drain hole 25, and the liquid drainage chamber is connected to the flow chamber by means of the drain hole 24; a crushing cutter is provided in the crushing chamber, and the crushing cutter includes a rotating shaft 27 and a cutting blade 28 arranged in the circumferential direction of the rotating shaft 27.

In the road and bridge drainage structure provided by the present invention, compared with the prior art, the inner cavity of the main shaft 1 includes a screening cavity and an overflow cavity arranged longitudinally in sequence, and the screening cavity and the overflow cavity are separated by a screening base 21, and a plurality of drainage holes 23 are provided on the screening base 21, and the drainage holes 23 are used to communicate with the screening cavity and the overflow cavity for the infiltration of rainwater; an inner cylinder 16 and an outer cylinder 17 are arranged in the screening cavity, and there is a buffer zone between the outer cylinder 17 and the side wall of the main well 1; 17, and a plurality of flow holes 18 are opened on the side wall of the lower part of the inner cylinder 16, and the outer cylinder 17 rotates around its own central axis to expose or cover the flow holes 18 on the side wall of the inner cylinder 16 to communicate with the inner cavity of the inner cylinder 16 and the buffer zone.

An auxiliary well is arranged on one side of the main well 1, and a filter plate 26 is arranged in the auxiliary well. The filter plate 26 divides the auxiliary well into a crushing chamber above and a liquid discharge chamber below. cavity; the drain cavity is connected to the overflow cavity of the main well 1 by means of the drain hole 24, and the water in the overflow cavity enters the drain cavity and mixes with the sewage in the drain cavity.

The road and bridge drainage structure provided by the present invention, by setting the main well 1 and the auxiliary well, and dividing the main well 1 and the auxiliary well into upper and lower areas, separating the impurities from the clean rainwater through the screening chamber to relieve the drainage pressure, and then discharging the impurities in the screening chamber into the crushing chamber of the auxiliary well for crushing and cutting, the crushed impurities fall into the drainage chamber and are mixed with clean rainwater and discharged; the possibility of rainwater blockage is reduced; at the same time, the setting of the inner cylinder 16 and the outer cylinder 17 can intermittently connect the screening chamber and the crushing chamber , so that the impurities enter the crushing cavity after a certain amount, which improves the crushing efficiency and saves energy consumption.

Optionally, the rotating shaft 27 is connected with a drive motor. Below the well cover of the auxiliary shaft is provided with a motor installation room, and the drive motor is located in the motor installation room and its output end is connected to the rotating shaft 27.

In some possible embodiments, please refer to FIG. 1 , the screening base 21 is conical, and the edge of the screening base 21 is provided with a downwardly recessed drainage groove 22 , the sewage drainage groove 22 is located outside the outer cylinder 17 and the sewage drainage groove 22 communicates with the sewage drainage hole 25 .

The lower end surface of the screening base 21 is a plane, and its upper end surface is a conical surface, and the height of the upper end surface of the screening base 21 gradually decreases from the middle to the surrounding. The drainage hole 23 provided on the screening base 21 can infiltrate the rainwater in the screening chamber to the overflow chamber below, so as to reduce the drainage pressure in the screening chamber; and the upper end surface of the screening base 21 is set as an inclined surface to facilitate the discharge of impurities to the outside.

Optionally, the angles between the positions of the upper surface of the screening base 21 and the horizontal plane are different, wherein the angle of inclination of the side of the screening base 21 away from the drain hole 25 is smaller than the angle of inclination of the side of the screening base 21 close to the drain hole 25 . Therefore, the side of the screening base 21 away from the drain hole 25 is higher than the side close to the drain hole 25 ; so as to facilitate the rapid discharge of impurities.

On the outer edge of the screening base 21, there is a sewage discharge groove 22 with an arc-shaped cross section.

Optionally, the side of the sewage discharge groove 22 close to the sewage discharge hole 25 is lower than the side of the sewage discharge groove 22 away from the sewage discharge hole 25 . The bottom of the sewage tank 22 is inclined to facilitate sewage discharge.

In some possible embodiments, referring to Fig. 1 and Fig. 4, a primary crushing assembly is provided in the screening chamber, and the primary crushing assembly includes a rotating shaft 4 arranged axially along the main shaft 1, and a rotating disk arranged on the rotating shaft 4; the rotating disk includes a fixed ring 7 and a plurality of fan-shaped blades 5 uniformly fixed on the inside of the fixed ring 7, and a flow channel is formed between two adjacent fan-shaped blades 5.

The upper part of the screening chamber has a primary crushing assembly, which performs preliminary crushing and cutting of the impurities entering the screening chamber so that they can pass through the sewage discharge hole 25 . The primary crushing assembly includes a rotating shaft 4 and a rotating disk, and the end of the rotating shaft 4 is rotatably connected to the bottom of the top cover 2 . The rotating disk is located below the top cover 2, and the rotating disk includes a fixed ring 7, which is rotated and installed inside the main well 1. One end of the fan-shaped blade 5 is connected to the rotating shaft 4 and the other end is connected to the inside of the fixed ring 7. As the fixed ring 7 rotates, it is used to crush impurities entering the main well 1 from the top cover 2.

The fan-shaped blades 5 are arranged at an angle to the horizontal plane, and there is a gap between two adjacent fan-shaped blades 5 , and a circulation channel is formed between two adjacent fan-shaped blades 5 to accommodate the passage of rainwater and impurities.

Optionally, the blade portion of the fan-shaped blade 5 is located at its front end.

Specifically, the front ends of the fan-shaped blades 5 have blades, and the upper ends of the fan-shaped blades 5 have broken spikes 6;

The front of the fan-shaped blade 5 is its direction of rotation, and the blade at its front end is used to cut impurities; and the upper end of the fan-shaped blade 5 is arranged with a plurality of broken spikes 6, and the broken spikes 6 face upwards, and are attached to the lower end of the top cover 2, and are used to break impurities falling between the fan-shaped blade 5 and the top cover 2.

Optionally, as shown in FIG. 1 and FIG. 3 , a plurality of rainwater holes 3 are opened on the top cover 2 . The rainwater hole 3 is an arc-shaped hole, and the width of the rainwater hole 3 along the radial direction of the top cover 2 gradually increases from top to bottom. The flow area of the rainwater hole 3 gradually increases from top to bottom, so as to prevent the water pressure from being too strong after the rainwater enters the hole and reduce the pressure of the rainwater hole 3 .

In some possible embodiments, please refer to FIG. 1 , the lower part of the outer cylinder 17 is also provided with a through hole compatible with the flow hole 18 , and the upper part of the outer cylinder 17 is connected with a rotary drive assembly, which is used to drive the horizontal rotation of the outer cylinder 17 to drive the through hole to communicate with or cover the flow hole 18 .

The inner cylinder 16 and the outer cylinder 17 are rotatably connected, and the through hole and the flow hole 18 are intermittently opened, that is, the inner cylinder 16 will only be opened after a certain amount of impurities exist. And when it is closed, the inner cylinder 16 only drains water to the overflow area through the drain hole 23 .

The outer cylinder 17 is connected with a rotation drive assembly. When the rotation drive assembly drives the outer cylinder 17 to rotate, the through hole can correspond to the flow hole 18. At this time, the inner cavity of the inner cylinder 16 communicates with the buffer zone outside the outer cylinder 17.

Specifically, the rotation drive assembly includes a linkage gear set, a linkage gear sleeve and a return torsion spring 12 .

The linkage gear set includes a gear ring 8, a linkage shaft 10, a first gear 9, and a second gear 11; the gear ring 8 is sheathed in the circumferential direction of the fixed ring 7; the linkage shaft 10 is rotatably connected to the well wall of the main shaft 1, the first gear 9 and the second gear 11 are both sleeved on the linkage shaft 10, and the first gear 9 meshes with the gear ring 8; the second gear 11 is located below the first gear 9; the second gear 11 includes a tooth part and a smooth part.

The linkage gear sleeve includes a connecting ring 13 and an arc-shaped rack 14. The connecting ring 13 is sleeved in the circumferential direction of the outer cylinder 17. The arc-shaped rack 14 is arranged outside the arc-shaped rack 14. The central angle of the arc-shaped rack 14 is less than 45°. The arc-shaped rack 14 meshes with the teeth of the second gear 11.

Return torsion spring 12 is sleeved on the outside of linkage shaft 10, and one end of return torsion spring 12 is fixedly connected on the well wall of main well 1, and the other end of return torsion spring 12 is fixedly connected on the tube wall of outer cylinder 17.

The rotation drive assembly is used to link the rotating shaft 4 and the outer cylinder 17 , and the rotation of the fan-shaped blade 5 and the outer cylinder 17 is simultaneously controlled by the rotation of the rotating shaft 4 .

The linkage gear set is arranged on the outside of the fixed ring 7, and it includes a toothed ring 8 connected to the fixed ring 7. The toothed ring 8 is sleeved on the outside of the fixed ring 7 and fixedly connected with the fixed ring 7. When the fixed ring 7 rotates, the toothed ring 8 also rotates synchronously.

Also be provided with interlocking shaft 10, the first gear 9 and the second gear 11 on the outside of ring gear 8, wherein interlocking shaft 10 is connected on the sidewall in the well in rotation, first gear 9 is set on the top of interlocking shaft 10, and second gear 11 is set on the bottom of interlocking shaft 10, and wherein first gear 9 and toothed ring 8 mesh transmission, when first gear 9 rotates, drives interlocking shaft 10 and second gear 11 to rotate synchronously. The outer surface of the second gear 11 includes a tooth portion and a smooth portion, wherein the central angle corresponding to the tooth portion is less than 180°.

The second gear 11 is connected with the linkage gear sleeve on the outer cylinder 17 . The linkage gear sleeve includes a connecting ring 13 and an arc-shaped rack 14. The arc-shaped rack 14 is located outside the connecting ring 13, and the central angle corresponding to the arc-shaped rack 14 is less than 45°. The arc-shaped rack 14 is used for meshing with the teeth of the second gear 11. The central angle corresponding to the arc-shaped rack 14 corresponds to the central angle corresponding to the teeth of the second gear 11 .

The second gear 11 rotates until its teeth mesh with the arc-shaped rack 14, the second gear 11 continues to rotate, and drives the outer cylinder 17 to rotate, so that the through hole of the outer cylinder 17 corresponds to the flow hole 18 of the inner cylinder 16, and the inner cavity of the inner cylinder 16 is communicated with the buffer zone. When the tooth part of the second gear 11 is separated from the arc-shaped rack 14, there is a gap between the smooth part of the second gear 11 and the connecting ring 13, and the outer cylinder 17 is not affected by the driving force, and the outer cylinder 17 is pulled by the reset torsion spring 12, and the outer cylinder 17 reversely rotates to the reset state; after the second gear 11 rotates to the next turn, the outer cylinder 17 is driven to rotate again.

There are two arc-shaped racks 14, and the two arc-shaped racks 14 are symmetrically arranged on the connecting ring 13; the central angle of the arc-shaped racks 14 is 30°.

Specifically, the linkage gear sets are arranged on both sides of the fixed ring 7 , and the second gears 11 of the two linkage gear sets are connected to the arc-shaped racks 14 on both sides of the outer cylinder 17 in one-to-one correspondence. The two linkage gear sets are arranged symmetrically, which is convenient for improving the rotation stability of the fixed ring 7 and the outer cylinder 17 .

In some possible embodiments, please refer to FIG. 5 , a communication chamber is provided between the main well 1 and the auxiliary well, and there is a conducting assembly in the communicating chamber. The conducting assembly connects the rotating drive assembly and the rotating shaft 27 to drive the rotating shaft 27 to rotate; the conducting assembly includes a transmission gear 29 and a driven gear 30 , the transmission gear 29 is rotationally connected in the communication chamber, and the driven gear 30 is sleeved on the rotating shaft 27 ;

The upper part of the main well 1 and the auxiliary well are communicated by means of a communication cavity, and a conductive assembly is provided in the communication cavity for linking the rotating shaft 4 and the rotating shaft 27 . The transmission assembly includes a transmission gear 29 and a driven gear 30 rotatably connected to the upper and lower ends of the communication chamber. The transmission gear 29 meshes with the driven gear 30 .

The driven gear 30 is sheathed on the rotating shaft 27 , and the driven gear 30 and the rotating shaft 27 rotate synchronously. And the transmission gear 29 meshes with the side of the first gear 9 away from the fixed ring 7 .

When the rotating shaft 4 rotates, the fixed ring 7 and the gear ring 8 rotate, and then the first gear 9 rotates. The first gear 9 meshes with the transmission gear 29 to drive the transmission gear 29 to rotate, and drives the driven gear 30 and the rotation shaft 27 to rotate, so as to drive the crushing tool to rotate and cut.

The rotating shaft 4 is connected with a variable speed motor, and the rotation speeds of the rotating shaft 4 and the rotating shaft 27 can be changed by changing the rotational speed of the motor, so as to adapt to different rainfall demands.

In some possible embodiments, please refer to Fig. 1 and Fig. 5, a receiving ring is provided on the top of the inner cylinder 16, and the edge of the receiving ring fits on the inner side wall of the main shaft 1; the lower end of the receiving ring is provided with an arc-shaped connecting groove, and the upper end of the outer cylinder 17 is slidably connected in the arc-shaped connecting groove.

The top of the inner cylinder 16 is provided with a flange outward, and the flange forms a receiving ring, and the edge of the receiving ring fits on the inner side wall of the main well 1 . The lower end of the receiving ring is provided with an arc-shaped connecting groove compatible with the top of the outer cylinder 17 to ensure that the outer cylinder 17 can only rotate along the arc-shaped connecting groove when rotating, thereby improving the stability of the outer cylinder 17.

The lower end of the outer cylinder 17 fits on the screening base 21 and is slidingly fitted with the upper end surface of the screening base 21 .

Optionally, the upper part of the buffer zone is provided with a baffle plate 15, the baffle plate 15 is annular, the outer edge of the baffle plate 15 is fixed on the inner side wall of the main well 1, and the inner edge of the baffle plate 15 fits on the outer side wall of the outer cylinder 17 and is slidably fitted with the outer cylinder 17. The shielding plate 15 is located between the through hole and the second gear 11 , shielding the second gear 11 to reduce moisture in the area of the second gear 11 , and ensuring the service life of the second gear 11 and the first gear 9 .

The linkage shaft 10 runs through the receiving ring and is rotatably connected to the receiving ring by means of bearings. The first gear 9 is located above the receiving ring, and the second gear 11 is located below the receiving ring. The fixed end of the return torsion spring 12 is connected on the side wall of the main shaft 1 or on the receiving ring.

Optionally, the outer side of the rotating shaft 4 is provided with a stirring assembly, which is located in the inner cavity of the inner cylinder 16. When the rotating shaft 4 rotates, the stirring assembly rotates accordingly to stir the rainwater in the inner cylinder 16 and prevent impurities from depositing on the screening base 21. The stirring assembly includes a cross bar 19 connected to the rotating shaft 4 and a longitudinal bar 20 connected below the cross bar 19 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The road and bridge drainage structure is characterized by comprising a main well (1) and an auxiliary well, wherein a rainwater hole (3) is formed in a top cover (2) of the main well (1); a screening base (21) with a drain hole (23) is arranged at the lower part of the main well (1), and the screening base (21) divides the main well (1) into a screening cavity and a overflowing cavity; an inner cylinder (16) and an outer cylinder (17) are arranged at the upper end of the screening base (21), a plurality of overflow holes (18) are formed in the circumferential direction of the inner cylinder (16) at intervals, and the outer cylinder (17) rotates to switch the on-off state of the overflow holes (18); the outer side of the outer cylinder (17) is provided with an annular buffer area; a filter plate (26) is arranged in the auxiliary well, the filter plate (26) divides the inner cavity of the auxiliary well into a crushing cavity and a drainage cavity, the crushing cavity is communicated with the buffer zone of the screening cavity by means of a drain hole (25), and the drainage cavity is communicated with the overflow cavity by means of a drainage hole (24); the crushing cavity is internally provided with a crushing cutter, and the crushing cutter comprises a rotating shaft (27) and cutting blades (28) arranged on the circumference of the rotating shaft (27).

2. Road and bridge drainage structure according to claim 1, characterized in that the screening base (21) is conical, the edge of the screening base (21) is provided with a drain groove (22) recessed downwards, the drain groove (22) is located on the outer side of the outer cylinder (17) and the drain groove (22) is communicated with the drain hole (25).

3. The road-bridge drainage structure of claim 2, characterized in that the side of the drain tank (22) close to the drain hole (25) is lower than the side of the drain tank (22) remote from the drain hole (25).

4. Road and bridge drainage structure according to claim 1, characterized in that a primary crushing assembly is arranged in the screening cavity, and comprises a rotating shaft (4) arranged along the axial direction of the main well (1) and a rotating disc arranged on the rotating shaft (4); the rotating disc comprises a fixed ring (7) and a plurality of fan-shaped blades (5) uniformly fixed on the inner side of the fixed ring (7), and a circulation channel is formed between two adjacent fan-shaped blades (5).

5. The road and bridge drainage structure according to claim 4, characterized in that the front ends of the fan-shaped blades (5) are provided with cutting edges, and the upper ends of the fan-shaped blades (5) are provided with crushing spines (6); the crushing spike (6) faces to the upper end, and the end part of the crushing spike (6) is attached to the lower end of the top cover (2).

6. The road and bridge drainage structure according to claim 4, characterized in that the lower part of the outer cylinder (17) is also provided with a through hole matched with the overflow hole (18), the upper part of the outer cylinder (17) is connected with a rotary driving assembly, and the rotary driving assembly is used for driving the outer cylinder (17) to horizontally rotate so as to drive the through hole to be communicated with or shield the overflow hole (18).

7. The roadway bridge drainage structure of claim 6, wherein the rotary drive assembly comprises a linkage gear set, a linkage gear sleeve and a reset torsion spring (12);

the linkage gear set comprises a toothed ring (8), a linkage shaft (10), a first gear (9) and a second gear (11); the toothed ring (8) is sleeved on the circumference of the fixed ring (7); the linkage shaft (10) is rotationally connected to the well wall of the main well (1), the first gear (9) and the second gear (11) are sleeved on the linkage shaft (10), and the first gear (9) is meshed with the toothed ring (8); the second gear (11) is positioned below the first gear (9); the second gear (11) comprises a tooth portion and a smooth portion;

the linkage gear sleeve comprises a connecting ring (13) and an arc-shaped rack (14), the connecting ring (13) is sleeved on the circumference of the outer cylinder (17), the arc-shaped rack (14) is arranged on the outer side of the arc-shaped rack (14), the central angle of the arc-shaped rack (14) is smaller than 45 degrees, and the arc-shaped rack (14) is meshed with the tooth part of the second gear (11);

the reset torsion spring (12) is sleeved on the outer side of the linkage shaft (10), one end of the reset torsion spring (12) is fixedly connected to the well wall of the main well (1), and the other end of the reset torsion spring (12) is fixedly connected to the wall of the outer cylinder (17).

8. The road and bridge drainage structure according to claim 7, characterized in that the number of the arc racks (14) is two, and the two arc racks (14) are symmetrically arranged on the connecting ring (13); the central angle of the arc-shaped rack (14) is 30 degrees.

9. The road and bridge drainage structure according to claim 7, characterized in that a communication cavity is arranged between the main well (1) and the auxiliary well, a conduction component is arranged in the communication cavity, and the conduction component is connected with the rotation driving component and the rotation shaft (27) and is used for driving the rotation shaft (27) to rotate; the transmission assembly comprises a transmission gear (29) and a driven gear (30), the transmission gear (29) is rotatably connected in the communication cavity, and the driven gear (30) is sleeved on the rotating shaft (27); the transmission gear (29) simultaneously engages the first gear (9) and the driven gear (30).

10. Road and bridge drainage structure according to claim 1, characterized in that the top of the inner cylinder (16) is provided with a receiving ring, the edge of which is attached to the inner side wall of the main well (1); the lower end of the bearing ring is provided with an arc-shaped connecting groove, and the upper end of the outer cylinder (17) is slidably connected in the arc-shaped connecting groove.