Water inlet and drainage system for municipal road and bridge

Abstract

The invention provides a water inlet and drainage system for municipal roads and bridges. A wellhead flush with the ground is arranged at the top of a cylindrical seat body, and a drainage branch pipe connected with an underground water conveying pipeline is arranged at the bottom of the cylindrical seat body; a storage ring groove with an upward opening is formed in the inner wall of the central cavity of the solid storage unit; the rotary separation unit is detachably arranged in the central cavity and is provided with a solid-liquid separation basket which is driven by a rotary motor to rotate around a vertical central shaft, and the solid-liquid separation basket is configured to receive surface accumulated water flowing in from the water inlet through hole and perform solid-liquid separation through the centrifugal effect; generated solid separated matters are conveyed to a storage ring groove, and separated water is conveyed to a drainage branch pipe. According to the water inlet and drainage system, water is removed through standing and centrifugal separation of the solid-liquid separation basket, and solid impurities collected and stored in the annular groove are utilized, so that the solid impurities are prevented from falling into the drainage branch pipe or blocking the solid-liquid separation basket at a well mouth, continuity of filtration and separation is achieved, and subsequent environmental sanitation treatment is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of municipal road and bridge engineering, and in particular provides a water inlet and drainage system for municipal roads and bridges. Background Art

[0002] At present, with the continuous deepening of urban development, the water inlet and drainage systems of municipal road and bridge projects are also expanding, and are widely used for the discharge and treatment of ground water such as rainwater and domestic sewage, effectively keeping the ground clean and avoiding ground water from affecting environmental sanitation and urban life. During rainfall, fallen leaves, small debris on the ground, etc. are mixed with rainwater and enter the ground water discharge well, which can easily cause blockage of underground water pipelines.

[0003] For this reason, fixed filter plates and fixed filter nets are installed in the wellheads of some ground drainage wells to filter fallen leaves and small debris on the ground and to transport the filtered clean water outward, which to a certain extent alleviates the blockage problem of solids falling directly into the underground water pipeline. However, fixed filter plates and fixed filter nets cannot effectively separate and remove water from the filtered solids, resulting in too high a water content in the solids, and the filtered solids cannot be automatically discharged outward. After a long time, the solids accumulate at the wellhead and cause blockage. Summary of the invention

[0004] Based on this, the present invention provides a water intake and drainage system for municipal roads and bridges to improve the effective filtration and separation of solids in the process of ground water treatment, and to realize the collection of filtered and separated solids, so as to prevent solid impurities from falling into underground transmission pipelines or clogging wellheads.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a water inlet and drainage system for municipal roads and bridges is provided, including a cylindrical seat body, a solid storage unit and a rotating separation unit; a wellhead flush with the ground is arranged on the top of the cylindrical seat body, and a drainage branch pipe connected to the underground water pipeline is arranged on the bottom; the solid storage unit is detachably arranged in the cylindrical seat body, and is provided with a vertically through central cavity, and a storage ring groove opening upward is arranged on the inner wall of the central cavity; the rotating separation unit is detachably arranged in the central cavity, including a manhole cover provided with a water inlet through hole, and a solid-liquid separation basket driven by a rotating motor to rotate around a vertical central axis is arranged at the bottom of the manhole cover, and the solid-liquid separation basket is configured to receive the ground surface water flowing in from the water inlet through hole, perform static filtration in parallel, and perform solid-liquid separation by centrifugal action, and transport the generated solid separation to the storage ring groove, and the separated water to the drainage branch pipe.

[0006] Furthermore, a protective shell with an opening facing downward is provided at the bottom of the manhole cover, the circular array of water inlet holes is arranged outside the protective shell, the rotary motor is installed in the protective shell with the motor shaft arranged downward, and the upper end of the central rotating rod supporting the solid-liquid separation basket is connected to the motor shaft.

[0007] Furthermore, the solid-liquid separation basket includes a central basket body coaxially arranged with the central rotating rod and opening upward, the basket bottom of the central basket body is provided with a bottom drainage hole, the basket wall extends upward, and the outer periphery of the basket wall is evenly distributed with a plurality of radial openings, each of the radial openings is hinged with an inner baffle plate that can be flipped outward, the inner baffle plate is provided with an outer drainage hole, and the water inlet through hole is arranged opposite to the radial opening of the central basket body up and down.

[0008] Furthermore, the central basket body is provided with radial guide grooves extending outward in the horizontal direction at each radial opening, and groove walls extending upward are provided on both sides of the radial guide grooves. The groove bottom is vertically through-set to guide the separated water discharged from the outer drainage holes to be discharged downward from the groove bottom, and the cross-sectional width of the radial guide groove is greater than the width of the inner baffle.

[0009] Furthermore, the inner baffle is hinged on the inner hinge at the bottom of the radial opening. When the central basket body is in a stationary state, the inner baffle is in a vertical state and close to the radial opening of the basket wall. When the rotary motor drives the central basket body to rotate at a low speed, the inner baffle flips outward to a horizontal state under the action of centrifugal force and is supported by the bottom support plate of the radial guide groove. The solid separation in the central basket body is discharged from the radial openings into the radial guide groove above the horizontal inner baffle.

[0010] Furthermore, the rotating separation unit is provided with a mechanical sensor for monitoring changes in the weight carried by the central basket. The mechanical sensor is connected to the controller signal of the rotating motor. The controller is configured to receive and control the start and stop of the rotating motor according to the monitored changes in the weight carried. When it is monitored that the weight carried by the central basket exceeds the set range value, the rotating motor is controlled to start and enter a low speed state and a high speed state in turn.

[0011] Compared with the current technology of fixing a filter screen in a wellhead to filter out solid impurities, the technical advantages of the water inlet and drainage system for municipal roads and bridges provided by the present invention are at least reflected in:

[0012] 1. A solid-liquid separation basket driven by a rotary motor is arranged under the manhole cover to statically filter the surface water that falls into the ground. The filtered clean water flows downward into the drainage branch pipe. The rotary motor drives the solid-liquid separation basket to rotate and centrifuge the water-containing solids to further remove the contained water. The solid separation is thrown outward by the centrifugal effect and transported to the storage ring groove. The generated separation water falls into the drainage branch pipe. The storage ring groove is used to realize the centralized collection of solid impurities separated by centrifugation, while avoiding the blockage of the wellhead and the underground transmission pipeline.

[0013] 2. By arranging radial openings on the outer periphery of the basket wall, arranging inner baffles that can be turned outward at the radial openings, and arranging outer drainage holes on the inner baffles, the central basket body rotates at a low speed, and the solid and water in the central basket body generate centrifugal motion; and further opening the inner baffles by centrifugal force, the rotation radius of water-containing solid impurities increases after entering the radial guide groove, and the centrifugal force on the water-containing solids increases, and further centrifugation is carried out, and the outer baffles are opened by the centrifugal force of high-speed rotation, so as to realize multi-stage solid-water separation and discharge the solids into the storage ring groove;

[0014] 3. The weight of the solid-containing ground water collected in the central basket is monitored by a mechanical sensor. When the weight of the collected solid-containing ground water exceeds the set range, the controller automatically controls the rotation motor to start, performs low-speed rotation separation and high-speed rotation separation, and then centrifugally throws it into the storage ring groove of the solid storage unit to empty the central basket, thereby realizing the solid-liquid separation treatment of the ground water and the orderly collection of solids, and improving the degree of automation of the treatment of the ground water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a water inlet and drainage system for a municipal road and bridge provided (part of the structure is removed);

[0017] Figure 2 It is a schematic diagram of the plan structure of an embodiment of a water inlet and drainage system for a municipal road and bridge provided;

[0018] Figure 3 It is a schematic diagram of the disassembled state of a water inlet and drainage system for a municipal road and bridge;

[0019] Figure 4 It is a three-dimensional view of a water inlet and drainage system for a municipal road and bridge provided;

[0020] Figure 5 It is a schematic diagram of the structure of the inner cylinder provided (part of the structure is removed);

[0021] Figure 6 is a schematic diagram of the structure of an embodiment of the provided rotary separation unit;

[0022] Figure 7 yes Figure 6 Schematic diagram of the structure in split state;

[0023] Figure 8 It is a schematic diagram of the split state structure of the provided rotating separation body;

[0024] Fig. 9 is a schematic diagram of the structure of the rotating seat body provided;

[0025] Fig.10 is a schematic diagram of the provided rotating separation body in a stationary draining state;

[0026] Fig.11 It is a schematic diagram of a state where the provided rotating separation body is in centrifugal separation;

[0027] Fig.12 A schematic diagram of a rotating separation body provided is in a state where solid matter is discharged outwardly.

[0028] Description of the accompanying drawings:

[0029] 1- cylindrical seat body, 11- drainage branch pipe;

[0030] 2-solid storage unit, 21a-upper storage ring groove, 21b-lower storage ring groove, 22-central cavity;

[0031] 3-rotating separation unit, 31a-upper solid-liquid separation basket, 31b-lower solid-liquid separation basket, 311-central basket body, 312-inner baffle, 313-outer baffle, 314-basket wall, 315-radial opening, 316-radial guide groove, 317-groove bottom, 318-bottom support plate, 319-inner hinge, 32-manhole cover, 33-rotating motor, 34-mechanical sensor, 35-central rotating rod.

[0032] It should be understood that the size of each part shown in the accompanying drawings is not drawn according to the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components. DETAILED DESCRIPTION

[0033] In the current municipal road and bridge projects, fixed filter plates, fixed filter nets, etc. are installed in the wellheads of ground discharge wells to separate fallen leaves and fine debris on the ground and to transport the filtered clean water outward, which to a certain extent alleviates the blockage problem of solids falling directly into underground water pipelines. However, such fixed filter plates and fixed filter nets cannot effectively separate and remove water from the filtered solids, resulting in excessive water content in the solids, and the filtered solids cannot be automatically discharged outwards. After a long time, the solids accumulate at the wellhead and cause blockage.

[0034] To this end, the present invention provides a water inlet and drainage system for municipal roads and bridges, wherein a wellhead flush with the ground is provided on the top of the cylindrical seat body, and a drainage branch connected to the underground water pipeline is provided on the bottom; the central cavity of the solid storage unit is provided with a storage ring groove opening upward; the rotary separation unit is provided with a solid-liquid separation basket driven by a rotary motor to rotate around a vertical central axis, and the solid-liquid separation basket is configured to receive ground surface water flowing in from the water inlet through hole, perform static filtration in parallel, and perform solid-liquid separation by centrifugal action, and transport the generated solid separation to the storage ring groove, and the separated water to the drainage branch. By carrying out the above-mentioned drainage system, the effective filtration and separation of solids in the process of ground surface water treatment is improved, and the collection of filtered and separated solids is realized, and continuous treatment is achieved, so as to prevent solid impurities from falling into the underground transmission pipeline or clogging the wellhead.

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Embodiment 1:

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a water inlet and drainage system for municipal roads and bridges, including a cylindrical seat body 1, a solid storage unit 2 and a rotary separation unit 3. The top of the cylindrical seat body 1 is provided with a wellhead flush with the ground, and the bottom is provided with a drainage branch pipe 11 connected to the underground water pipeline; the solid storage unit 2 is detachably arranged in the cylindrical seat body 1, and is provided with a vertically through central cavity 22, and the inner wall of the central cavity 22 is provided with a storage ring groove opening upward; the rotary separation unit 3 is detachably arranged in the central cavity 22, including a manhole cover 32 provided with a water inlet through hole, and the bottom of the manhole cover 32 is provided with a solid-liquid separation basket driven by a rotary motor 33 to rotate around a vertical central axis, and the solid-liquid separation basket is configured to receive the ground surface water flowing in from the water inlet through hole, perform static filtration, and perform solid-liquid separation by centrifugal action, and transport the generated solid separation to the storage ring groove, and the separated water to the drainage branch pipe 11.

[0038] The working principle of the water inlet and drainage system for municipal roads and bridges provided is as follows: after the local surface water falls into the solid-liquid separation basket through the water inlet hole of the manhole cover 32, first, it is statically filtered by the solid-liquid separation basket, and most of the clean water is filtered out and flows downward into the drainage branch pipe 11, and the water-containing solids are retained in the solid-liquid separation basket; then, the rotary motor 33 drives the solid-liquid separation basket to rotate to perform solid-liquid separation under the action of centrifugation, and the solid separation is thrown outward by the centrifugal action and transported to the storage ring groove, and the generated separation water falls into the drainage branch pipe 11.

[0039] Based on the above embodiments, the water inlet and drainage system for municipal roads and bridges provided herein, by arranging a solid-liquid separation basket driven by a rotating motor below the wellhead, statically filters the surface water falling on the ground, and centrifugally separates the retained water-containing solids to further remove the contained water, and then throws them outward and transports them to the storage ring groove, which can efficiently separate the solid-liquid of the surface water, avoid solid impurities entering the underground water supply pipeline and causing blockage, and realize the unobstructed solid-liquid separation basket, avoid the accumulation of solid impurities in the solid-liquid separation basket and cause the circulation and filtration capacity to be reduced, and use the storage ring groove to realize the centralized collection of the solid impurities separated by centrifugation, which is convenient for subsequent lifting and centralized removal, and convenient for subsequent sanitation treatment.

[0040] Embodiment 2:

[0041] On the basis of Example 1, the structure of the solid storage unit and the solid-liquid separation basket is optimized, a central basket body and radial guide grooves are provided, an inner baffle is provided on the central basket body, and an outer baffle is provided outside the radial guide grooves. The details are as follows:

[0042] like Figure 5 As shown, the solid storage unit 2 includes an outer cylinder, an inner cylinder and an annular partition. The outer cylinder is engaged with the cylindrical seat body 1, and the inner cylinder is concentrically arranged with the outer cylinder. The partition is connected to the bottom of the annulus between the outer cylinder and the inner cylinder and is provided with a drainage hole. The outer cylinder, the inner cylinder and the annular partition constitute a storage ring groove with an annular upper opening structure.

[0043] like Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, during the implementation process, a protective shell with an opening facing downward is provided at the bottom of the manhole cover 32, the circular array of water inlet holes is arranged outside the protective shell, the rotary motor 33 is installed in the protective shell and the motor shaft is arranged downward, and the upper end of the central rotating rod 35 carrying the solid-liquid separation basket is connected to the motor shaft.

[0044] During implementation, the solid-liquid separation basket includes a central basket body 311 coaxially arranged with the central rotating rod 35 and opening upward, the basket bottom of the central basket body 311 is provided with a bottom drainage hole, and the basket wall 314 extends upward, and the outer periphery of the basket wall 314 is evenly distributed with a plurality of radial openings 315, and each of the radial openings 315 is hinged with an inner baffle 312 that can be flipped outward, and the inner baffle 312 is provided with an outer drainage hole, and the water inlet through hole is arranged opposite to the radial opening 315 of the central basket body 311 in upper and lower directions, and the inner cylinder body constitutes a central cavity 22 for accommodating the vertically raised solid-liquid separation basket.

[0045] like Fig.10 As shown, based on the above embodiment, a bottom drainage hole is set at the bottom of the central basket body 311, and a radial opening 315 is set at the periphery of the basket wall. The radial opening 315 is shielded by an inner baffle plate 312 that can be flipped outward, and the inner baffle plate is provided with an outer drainage hole. The central basket body 311 collects ground water flowing down from the water inlet hole of the manhole cover. When the rotating motor 33 is not working, the clear water in the collected ground water is discharged outward from the bottom drainage hole and the outer drainage hole of the central basket body 311 under the action of gravity, falls into the bottom of the cylindrical seat body 1 along the central cavity 22, and is discharged outward from the drainage branch pipe 11, thereby realizing static drainage and preliminarily reducing the water content of the water-containing solids.

[0046] like Fig. 9 As shown, further, in a preferred embodiment, the central basket body 311 is provided with radial guide grooves 316 extending outward in the horizontal direction at each radial opening 315, and groove walls extending upward are provided on both sides of the radial guide grooves 316. The groove bottom 317 is vertically penetrated to guide the separated water discharged from the outer drainage hole to be discharged downward from the groove bottom 317, and the cross-sectional width of the radial guide groove 316 is greater than the width of the inner baffle 312. The inner baffle plate 312 is hinged on the inner hinge 319 at the bottom of the radial opening 315. When the central basket body 311 is in a stationary state, the inner baffle plate 312 is in a vertical state and close to the radial opening 315 of the basket wall 314. When the rotary motor 33 drives the central basket body 311 to rotate at a low speed, the inner baffle plate 312 is flipped outward to a horizontal state under the action of centrifugal force and is supported by the bottom support plate 318 of the radial guide groove 316. The solid separation in the central basket body 311 is discharged from each radial opening 315 into the radial guide groove 316 above the horizontal inner baffle plate 312, and the outer baffle plate 313 is flipped outward and extends above the upper opening structure.

[0047] An outer baffle plate 313 is provided at the outer end of each radial guide groove 316, and the outer baffle plate 313 is hinged on an outer hinge at the bottom of the outer end of the radial guide groove 316. When the rotary motor 33 drives the central basket body 311 to rotate at a low speed, the outer baffle plate 313 is in a vertical state and close to the outer end opening of the radial guide groove 316. When the rotary motor 33 drives the central basket body 311 to rotate at a high speed, the outer baffle plate 313 is flipped outward to a horizontal state under the action of centrifugal force and is supported by the groove bottom 317 at the outer end of the radial guide groove 316. The solid separation in the radial guide groove 316 is discharged outward from the radial guide groove 316 through the upper side of the horizontal outer baffle plate 313 to the storage ring groove.

[0048] During implementation, the inner hinge 319 is provided with an inner torsion spring that applies an inner thrust to the inner baffle plate 312 so that it is vertically pressed against the radial opening 315, and the outer hinge is provided with an outer torsion spring that applies an inner thrust to the outer baffle plate 313 so that it is vertically pressed against the outer end of the radial guide groove 316, and the torque force of the inner torsion spring is smaller than the torque force of the outer torsion spring.

[0049] When the rotary motor 33 drives the central basket 311 to rotate at a low speed, the water-containing solids generate centrifugal motion in the central basket 311, and the separated water is thrown out from the bottom drainage holes and the outer drainage holes of the central basket 311, thereby further reducing the water content of the water-containing solids.

[0050] like Fig.11 As shown, radial guide grooves 316 extending radially outward are provided at each radial opening 315 of the central basket body 311. When the rotary motor 33 drives the central basket body 311 to rotate at a low speed, the inner baffle 312 is opened by the centrifugal force, and the water-containing solid impurities in the central basket body 311 enter the radial guide grooves 316. At this time, the rotation radius of the water-containing solid impurities becomes larger. Compared with the central basket body, the centrifugal force on the water-containing solid becomes larger, and the water content of the water-containing solid is further separated, thereby further reducing the water content of the water-containing solid.

[0051] like Fig.12 As shown, when the rotary motor 34 drives the central basket body 311 to rotate at a high speed, the outer baffle plate 313 is flipped outward by the centrifugal force, and the solids produced by separation are thrown outward into the storage ring groove of the solid storage unit 2 by the centrifugal force, and are sequentially subjected to static drainage, centrifugal separation and dehydration in the central basket body 311, and separation and dehydration in the radial guide groove 316. The moisture content in the solids is effectively reduced, the bearing weight of the storage ring groove is reduced, and the workload of subsequent removal of solid impurities is effectively reduced.

[0052] Embodiment three:

[0053] like Figure 6 and Figure 7As shown, in some embodiments, an automatic control design for the start and stop of the rotary motor is performed. A high speed state and a low speed state are set. Specifically, the rotary separation unit 3 is provided with a mechanical sensor 34 for monitoring the change of the weight carried by the central basket 311. The mechanical sensor 34 is connected to the controller signal of the rotary motor 33. The controller is configured to receive and control the start and stop of the rotary motor 33 according to the monitored change of the weight carried. When it is monitored that the weight carried by the central basket 311 exceeds the set range value, the rotary motor 33 is controlled to start and enter the low speed state and the high speed state in sequence.

[0054] The rotary motor 33 is provided with a low speed state and a high speed state. In the low speed state, the centrifugal force applied to the inner baffle plate 312 is greater than the torque force of the inner torsion spring and the inner baffle plate 312 flips outward, and the centrifugal force applied to the outer baffle plate 313 is less than the torque force of the outer torsion spring and the outer end of the radial guide groove 316 is maintained; in the high speed state, the centrifugal force applied to the outer baffle plate 313 is greater than the torque force of the outer torsion spring and the outer baffle plate flips outward.

[0055] Based on the above embodiment, the weight change of the central basket body 311 is monitored by the mechanical sensor 34. Under the condition that the weight of the central basket body 311 remains unchanged, the weight of the solid-containing ground water collected in the central basket body is monitored. When the weight of the collected solid-containing ground water exceeds the set range value, the controller automatically controls the rotation motor 33 to start, perform low-speed rotation separation and high-speed rotation separation, and then centrifuge it into the storage ring groove of the solid storage unit 2 to empty the central basket body 311, and then collect the ground water again. Through the above cycle, the solid-liquid separation treatment of the ground water and the orderly collection of solids are realized, the blockage of solid impurities in the wellhead is avoided, and the degree of automation of the treatment of the ground water is improved.

[0056] Embodiment 4:

[0057] On the basis of the above-mentioned embodiment, the structure is further optimized and vertical multi-layer separation is set to effectively improve the separation efficiency of solid-containing water.

[0058] like Figure 1 , Figure 5 and Figure 6 As shown, specifically, during the implementation process, the rotating separation unit 3 at least includes an upper solid-liquid separation basket 31a and a lower solid-liquid separation basket 31b arranged vertically at intervals, and the solid storage unit 2 at least includes an upper storage ring groove 21a and a lower storage ring groove 21b arranged vertically at intervals, the upper solid-liquid separation basket 31a is arranged opposite to the upper opening of the upper storage ring groove 21a, the lower solid-liquid separation basket 31b is arranged opposite to the upper opening of the lower storage ring groove 21b, the drainage hole of the upper solid-liquid separation basket 31a is larger than the drainage hole diameter of the lower solid-liquid separation basket 31b; the drainage hole of the upper storage ring groove 21a is larger than the drainage hole diameter of the lower storage ring groove 21b.

[0059] By setting the upper solid-liquid separation basket 31a and the lower solid-liquid separation basket 31b, the drainage hole of the upper solid-liquid separation basket 31a is set larger than the drainage hole diameter of the lower solid-liquid separation basket 31b, so that the large volume solids in the ground water are collected in the upper solid-liquid separation basket 31a, and the small volume solids fall into the lower solid-liquid separation basket 31b from the bottom drainage hole of the upper solid-liquid separation basket 31a, and are collected in the lower solid-liquid separation basket 31b, so that solids of different volumes and particle sizes are collected separately and subsequently centrifuged, and then enter the upper storage ring groove 21a and the lower storage ring groove 21b respectively, so as to realize the classified storage of solids of different volumes and particle sizes, effectively improve the separation efficiency, and facilitate the subsequent solid removal and subsequent processing. In addition, the above process also avoids the problem of excessively high power peak of the rotating motor in a short period of time, reduces the load of the subsequent rotating motor 33 driving the central basket 311, and reduces the output torque peak of the rotating motor.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water inlet and drainage system for municipal roads and bridges, characterized in that: include: A cylindrical seat body (1) is provided with a wellhead flush with the ground at the top and a drainage branch pipe (11) connected to an underground water pipeline at the bottom; The solid storage unit (2) is detachably arranged in the cylindrical seat body (1) and is provided with a vertically penetrating central cavity (22). The inner wall of the central cavity (22) is provided with a storage annular groove opening upward.

2. The water inlet and drainage system for municipal roads and bridges according to claim 1 is characterized in that: The rotary separation unit (3) is detachably arranged in the central cavity (22), and comprises a manhole cover (32) provided with a water inlet through hole, and a solid-liquid separation basket is arranged at the bottom of the manhole cover (32) and is driven by a rotary motor (33) to rotate around a vertical central axis.

3. The water inlet and drainage system for municipal roads and bridges according to claim 2 is characterized in that: The solid-liquid separation basket is configured to receive the surface water flowing in from the water inlet through hole, perform static filtration in parallel, and perform solid-liquid separation by centrifugal action, and transport the generated solid separation to the storage ring groove and the separated water to the drainage branch pipe (11).

4. The water inlet and drainage system for municipal roads and bridges according to claim 3 is characterized in that: A protective shell with an opening facing downward is provided at the bottom of the manhole cover (32); the circular array of water inlet through holes is arranged outside the protective shell; the rotary motor (33) is installed in the protective shell with the motor shaft facing downward; and the upper end of the central rotating rod (35) carrying the solid-liquid separation basket is connected to the motor shaft.

5. The water inlet and drainage system for municipal roads and bridges according to claim 4 is characterized in that: The solid-liquid separation basket comprises a central basket body (311) coaxially arranged with a central rotating rod (35) and opening upward, the basket bottom of the central basket body (311) is provided with a bottom drainage hole, a basket wall (314) extends upward, and a plurality of radial openings (315) are evenly distributed on the periphery of the basket wall (314).

6. The water inlet and drainage system for municipal roads and bridges according to claim 5 is characterized in that: An inner baffle (312) capable of turning outward is hingedly connected to each radial opening (315), and the inner baffle (312) is provided with an outer drainage hole. The water inlet through hole and the radial opening (315) of the central basket body (311) are arranged vertically opposite to each other.

7. The water inlet and drainage system for municipal roads and bridges according to claim 6 is characterized in that: The central basket body (311) is provided with radial guide grooves (316) extending outward in the horizontal direction at each radial opening (315), and groove walls extending upward are provided on both sides of the radial guide grooves (316). The groove bottom (317) is vertically penetrated to guide the separated water discharged from the outer drainage holes to be discharged downward from the groove bottom (317), and the cross-sectional width of the radial guide groove (316) is greater than the width of the inner baffle (312).

8. The water inlet and drainage system for municipal roads and bridges according to claim 7 is characterized in that: The inner baffle (312) is hinged on an inner hinge (319) at the bottom of the radial opening (315). When the rotary motor (33) drives the central basket (311) to rotate at a low speed, the inner baffle (312) flips outward to a horizontal state under the action of centrifugal force and is supported by a bottom support plate (318) of the radial guide groove (316). Solid separated matter in the central basket (311) is discharged from each radial opening (315) to the upper part of the inner baffle (312) in a horizontal state in the radial guide groove (316).

9. The water inlet and drainage system for municipal roads and bridges according to claim 5, characterized in that: The rotary separation unit (3) is provided with a mechanical sensor (34) for monitoring the change of the load-bearing weight of the central basket (311); the mechanical sensor (34) is connected to the controller signal of the rotary motor (33); the controller is configured to receive and control the start and stop of the rotary motor (33) according to the monitored change of the load-bearing weight.

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