CN114164753A

CN114164753A - Municipal bridge drainage device easy to clean

Info

Publication number: CN114164753A
Application number: CN202111494284.0A
Authority: CN
Inventors: 黄沛; 周铭倩
Original assignee: Wuxi No5 Municipal Construction Engineering Co ltd
Current assignee: Wuxi No5 Municipal Construction Engineering Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-03-11
Anticipated expiration: 2041-12-08
Also published as: CN114164753B

Abstract

The invention relates to the field of municipal drainage engineering, in particular to an easily-cleaned municipal bridge water drainage device which comprises a grate component, an accommodating box and a pre-buried pipe, wherein the grate component comprises an outer ring, an inner ring and an elastic piece, the inner ring comprises a plurality of holding blocks, and a collecting box is arranged in the accommodating box. The grate component is detachably connected with a positioning block, the positioning block is rotatably connected with a driving screw rod, and the driving screw rod is in threaded connection with a driving block. The top of collecting the box is connected with the protection casing, the protection casing includes a plurality of expansion plates, the expansion plate includes fixed plate, rotor plate. The positioning block is connected with a lifting sleeve in a sliding mode along the vertical direction, and the top end of the fixing plate is fixed to the lifting sleeve. This application has the effect that the workman will collect the box and take out from holding the chamber of being convenient for, has reduced simultaneously and has collected the box and at the possibility that takes out in-process impurity spills.

Description

Municipal bridge drainage device easy to clean

Technical Field

The invention relates to the field of municipal drainage engineering, in particular to an easy-to-clean municipal bridge drainage device.

Background

Rainwater on the bridge needs to be drained through a drainage pipeline specially built so as to prevent rainwater from extruding on the bridge to influence normal walking of people or vehicles.

At present, Chinese patent with publication number CN109653087B discloses an easy-to-clean municipal bridge water draining device, which comprises a pre-buried pipe, a grate component and a collecting component, wherein an opening at the upper end of the pre-buried pipe is connected with an accommodating cavity, the grate component comprises an inner ring, an outer ring and a connecting rod, and the axial cutting of the inner ring is equally divided into 3 or 4 fan-shaped blocks. The water inlet hole of the grate component is formed between the adjacent connecting rods, and the outer wall of the inner ring is sleeved with a rubber ring used for tightly holding the fan-shaped blocks. The collecting assembly comprises a collecting box with a conical structure, a lifting rod and inclined rods, wherein the collecting box is provided with filter holes, and the inclined rods are the same as the fan-shaped blocks in number and are uniformly arranged along the edge of the lifting rod.

When the impurities in the collecting box need to be cleaned, the lifting rod is lifted upwards only through the handle, the fan-shaped blocks are uniformly and outwards expanded by the inclined rods, and the rubber ring is gradually expanded. Finally, the collecting box is moved out of the accommodating cavity, so that impurities in the collecting box are cleaned

With respect to the related art in the above, the inventors consider that: when the impurity in the workman clearance collection box, upwards pulling lifting rod, owing to need overcome the elastic force of rubber ring, need apply certain manpower and just can make a plurality of segments open. If the worker violently exerts force, after the collection box breaks away from the sector block, the worker stops pulling the lifting rod, so that impurities in the collection box continuously move upwards due to inertia, and the impurities are easy to spill out of the collection box. Therefore, in order to reduce the amount of the impurities spilled, a worker needs to overcome the elastic force applied by the rubber ring and pull the lifting rod upwards slowly, so that the operation of the worker is inconvenient.

Disclosure of Invention

In order to facilitate the workman will collect the box and take out from holding the chamber, reduce simultaneously and collect the box and take out the in-process impurity spilled possibility, this application provides the municipal bridge who easily clears up sluices the device.

The application provides a pair of municipal bridge sluicing device of easy clearance adopts following technical scheme:

an easy-to-clean municipal bridge water draining device comprises a grate component, a containing box and a pre-buried pipe, wherein an inner cavity of the containing box is a funnel-shaped containing cavity, the grate component is connected to the top end of the containing box, the pre-buried pipe is communicated with the bottom of the containing box, the grate component comprises an outer ring, an inner ring and an elastic piece, the inner ring comprises a plurality of clasping blocks, the clasping blocks are arranged in a sliding mode along the radial direction of the outer ring, the elastic piece is used for driving the clasping blocks to be close to each other, a collecting box is arranged in the containing box, the collecting box is of a porous structure, a positioning block is detachably connected to the grate component, a driving screw rod is rotatably connected to the positioning block and is vertically arranged, the driving screw rod penetrates through the inner ring and then is inserted into the containing cavity, and a driving block is connected to the driving screw rod through threads, the utility model discloses a set up the box, including the locating piece, the top of collecting the box is connected with the protection casing, the protection casing is most advanced round platform shape setting up, the protection casing includes a plurality of expansion plates, and is a plurality of the expansion plate is followed the circumference of collecting the box distributes, the expansion plate includes fixed plate, rotor plate, the fixed plate is fixed in collect the box, the rotor plate rotate connect in the fixed plate, the rotor plate with the driving block is connected, be connected with the lift cover along vertical sliding on the locating piece, the top of fixed plate is fixed in the lift cover, the top of rotor plate contradict in the lift cover.

Through adopting above-mentioned technical scheme, the rainwater flows into from the grate subassembly top and holds the intracavity, collects the box and places when accomodating the intracavity, and the fixed plate overlaps with the rotor plate and sets up for the rainwater that holds the intracavity can flow into in the collection box from between the adjacent fixed plate. After the collecting box filters the rainwater, the rainwater flows into the embedded pipe.

When needs cleared up the impurity in collecting the box, the staff rotates drive screw, and drive screw drives the drive block and rotates, and the drive block drives a plurality of rotor plates and rotates, and when the rotor plate was contradicted in adjacent fixed plate, the circumference of protection casing was in the encapsulated situation this moment, and the protection casing played the effect of sheltering from to the upside of collecting the box to impurity in the box of collecting has been reduced and has been spilt the possibility in collecting the box.

The rotor plate is contradicted and can't continue to rotate behind adjacent fixed plate to restricted the rotation of drive block, made the drive block along drive screw's axial rising, the drive block drives the rotor plate and rises, the rotor plate drives the lift cover and rises, the lift cover drives the fixed plate and rises, the fixed plate drives the collection box and rises. When the outer wall of protection casing is contradicted in the piece of hugging tightly, the elastic force that the elastic component was overcome to the piece was kept away from each other tightly to a plurality of blocks of hugging of protection casing drive for protection casing and collection box upwards break away from the grate subassembly gradually.

Because the driving screw has self-locking property, the protective cover and the collecting box are not easy to slide down under the action of gravity, and the ascending stability of the collecting box is improved. After the holding blocks are gradually propped open, the positioning blocks are disassembled, and the positioning blocks are upwards pulled, so that the driving screw rod, the protective cover and the collecting box are driven to upwards move, the collecting box is separated from the accommodating cavity and the grate assembly, and then impurities in the collecting box are cleaned.

Above-mentioned technical scheme is through mutually supporting of locating piece, drive screw, drive block, protection casing, lift cover, and the workman of being convenient for will collect the box and take out from holding the chamber, has reduced simultaneously and has collected the box and at the possibility that the in-process impurity spills of taking out.

Optionally, the driving screw penetrates through the lifting sleeve.

Through adopting above-mentioned technical scheme, on the one hand the lift cover provides the effect of support and direction for the lift of protection casing, and on the other hand the lift cover protects drive screw, has reduced the impaired possibility of drive screw.

Optionally, the cross section of the lifting sleeve is polygonal.

Through adopting above-mentioned technical scheme, avoided the lift cover to take place the possibility of rotation to stability when the lift cover drives the protection casing lift has been improved.

Optionally, an accommodating groove is formed in one side wall of the fixing plate, and the rotating plate can rotate into the accommodating groove.

Through adopting above-mentioned technical scheme, rotate the rotor plate to the holding tank in for have the space between the adjacent fixed plate, thereby the rainwater of being convenient for gets into the protection casing and gets into and collect the box, rotates the rotor plate outside the holding tank, makes the rotor plate contradict in adjacent fixed plate, is convenient for seal the circumference of protection casing. The holding tank plays the effect of direction to the rotation of rotor plate, stability when having improved the rotor plate and having rotated.

Optionally, a driving rod is connected between the rotating plate and the driving block, a guide groove is formed in one side, facing the driving block, of the fixing plate, the guide groove is communicated with the accommodating groove, and when the driving rod rotates around the driving screw rod, the driving rod slides in the guide groove.

Through adopting above-mentioned technical scheme, the drive block passes through the actuating lever and drives the rotor plate rotation, and the guide way plays the effect of direction to the guide bar, has improved the stability when the guide bar rotates, and then has improved the stability when the rotor plate rotates.

Optionally, a plurality of telescopic rods are connected between the clasping block and the outer ring, and point to the center of the outer ring.

Through adopting above-mentioned technical scheme, the telescopic link plays the effect of direction to the removal of embracing the piece tightly to the stability when embracing the piece and removing has been improved.

Optionally, the clasping block faces the connecting position of the side wall and the bottom wall of the driving screw rod and is provided with a conflict inclined plane, and the conflict inclined plane is used for conflicting with the outer wall of the protective cover.

Through adopting above-mentioned technical scheme, the in-process that the protection casing goes up and down is contradicted behind the conflict inclined plane to drive a plurality of blocks of holding tightly and keep away from the removal each other, the conflict inclined plane has increased the area of contact who holds tightly block and protection casing, has improved the stability when the piece removal is held tightly in the protection casing drive.

Optionally, the up end of outer loop is provided with solid fixed ring, gu fixed ring's diapire is fixed with the fixed block, the up end of outer loop is opened has the confession the slot that the fixed block was inserted and is established, gu fixed ring with fixedly connected with dead lever between the locating piece.

Through adopting above-mentioned technical scheme, through the grafting cooperation of fixed block and slot, will gu fixed ring can dismantle to connect on the outer loop, gu fixed ring and fixed rod support the location to the holding ring.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the mutual matching of the positioning block, the driving screw rod, the driving block, the protective cover and the lifting sleeve, a worker can conveniently take the collecting box out of the accommodating cavity, and the possibility of spilling impurities in the process of taking the collecting box out is reduced;

2. the driving screw rod penetrates through the lifting sleeve, on one hand, the lifting sleeve provides a supporting and guiding effect for the lifting of the protective cover, on the other hand, the lifting sleeve protects the driving screw rod, and the possibility of damage of the driving screw rod is reduced;

3. a holding tank is opened to a lateral wall of fixed plate, and the rotor plate is rotatable to in the holding tank, and the holding tank provides the direction for the rotation of rotor plate, has improved the stability when rotor plate rotates.

Drawings

FIG. 1 is a schematic structural diagram of an easy-to-clean municipal bridge drainage device according to an embodiment of the application.

FIG. 2 is a top view of an easy-to-clean municipal bridge drainage device according to an embodiment of the application.

Fig. 3 is a sectional view taken along line a-a in fig. 2.

Fig. 4 is a schematic structural view of a grate assembly according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of an inner ring according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of the fixing ring, the positioning block and the protection cover according to the embodiment of the application.

Fig. 7 is a schematic structural view of the expansion plate according to the embodiment of the present application.

Fig. 8 is a schematic structural diagram of an hugging block according to an embodiment of the present application.

Description of reference numerals:

1. a grate assembly; 11. an outer ring; 111. a slot; 12. an inner ring; 121. a hugging block; 122. a card slot; 123. abutting against the inclined plane; 13. an elastic member; 131. an elastic sleeve; 14. a telescopic rod; 141. fixing a sleeve; 142. a slide bar; 2. accommodating the box; 21. an accommodating chamber; 3. pre-burying a pipe; 4. a fixing ring; 41. a fixed block; 42. fixing the rod; 5. positioning blocks; 51. a guide ring groove; 52. a lifting sleeve; 6. a drive screw; 61. a drive block; 62. a knob; 63. a drive rod; 7. a collection box; 8. a protective cover; 81. a retractable plate; 811. a fixing plate; 812. a rotating plate; 813. accommodating grooves; 814. a guide groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses municipal bridge sluicing device of easy clearance.

Referring to fig. 1, fig. 2 and fig. 3, municipal bridge drainage device of easy clearance includes grate subassembly 1, hold box 2, pre-buried pipe 3, grate subassembly 1, hold box 2, pre-buried pipe 3 is all pre-buried in the bridge, grate subassembly 1 is located the top of holding box 2, pre-buried pipe 3 is vertical setting and is located the below of holding box 2, the upside of holding box 2 is the opening form, it has the chamber 21 that holds that is hopper-shaped to hold in the box 2, it also is the toper of most advanced downward to leak hopper-shaped promptly. The top end of the embedded pipe 3 is communicated with the accommodating cavity 21.

Referring to fig. 1, 4 and 5, the grate assembly 1 comprises an outer ring 11, an inner ring 12 and an elastic piece 13, wherein the axes of the outer ring 11 and the inner ring 12 are vertically arranged, the outer ring 11 and the inner ring 12 are coaxially arranged with the accommodating box 2, and the outer ring 11 is fixedly connected to the top end of the accommodating box 2. The inner ring 12 includes a plurality of clasping blocks 121, and the clasping blocks 121 are annular when they are closed to each other.

Referring to fig. 4, a telescopic rod 14 is connected between the clasping block 121 and the inner wall of the outer ring 11, and the axial direction of the telescopic rod 14 is directed to the center of the outer ring 11. The telescopic rod 14 includes a fixing sleeve 141 and a sliding rod 142, one end of the fixing sleeve 141 is fixedly connected to the inner wall of the outer ring 11, the sliding rod 142 is slidably inserted into the fixing sleeve 141, and one end of the sliding rod 142 penetrating through the fixing sleeve 141 is fixedly connected to the clasping block 121.

The sliding fit of the sliding rod 142 and the fixing sleeve 141 improves the stability of the clasping block 121 when moving in the radial direction of the outer ring 11.

Referring to fig. 4 and 5, the elastic member 13 is an elastic sleeve 131, the elastic sleeve 131 is sleeved on the outer sides of the plurality of clasping blocks 121, the outer side wall of each clasping block 121 is provided with a clamping groove 122 for clamping the elastic sleeve 131, and the clamping groove 122 limits the elastic sleeve 131, so that the possibility that the elastic sleeve 131 is separated from the clasping blocks 121 is reduced.

The elastic sleeve 131 exerts elastic force on the plurality of clasping blocks 121, so that the plurality of clasping blocks 121 are clasped, and the clasping blocks 121 are attached to each other in a natural state. The number of the telescopic rods 14 is large, so that the telescopic rods 14 are matched with the inner ring 12 and the outer ring 11 to form a filter screen, and rainwater flows into the accommodating cavity 21 through gaps between the adjacent telescopic rods 14. Therefore, larger impurities are blocked outside the accommodating cavity 21 by the grate component 1, and smaller impurities flow into the accommodating cavity 21 along with rainwater.

Referring to fig. 1, 4 and 6, the upper surface of the outer ring 11 is attached with a fixing ring 4, the fixing ring 4 is coaxially arranged with the outer ring 11, and the upper surface of the fixing ring 4 is slightly lower than the upper surface of the bridge. The bottom wall of the fixing ring 4 is fixedly connected with a plurality of fixing blocks 41, the upper surface of the outer ring 11 is provided with slots 111 which are in one-to-one correspondence with the fixing blocks 41, and the fixing blocks 41 are in splicing fit with the slots 111.

The fixing block 41 is inserted into the insertion groove 111, thereby positioning the fixing ring 4 on the outer ring 11.

Referring to fig. 3 and 4, a positioning block 5 is disposed at the center of the fixing ring 4, the positioning block 5 is cylindrical and is coaxially disposed with the fixing ring 4, the positioning block 5 is inserted into the inner ring 12, and when the plurality of clasping blocks 121 are close to each other and attached to each other, the clasping blocks 121 abut against the positioning block 5. Thus, the clasping block 121 improves the stability of the positioning block 5.

Referring to fig. 6, four fixing rods 42 are fixedly connected between the fixing ring 4 and the positioning block 5, the four fixing rods 42 are distributed around the positioning block 5, and the fixing rods 42 point to the center of the fixing ring 4.

The fixing rods 42 are arranged in a small number, so that the weight is reduced, and the positioning block 5 and the fixing ring 4 are conveniently detached from the grate component 1.

Referring to fig. 3 and 6, the positioning block 5 is rotatably connected with a driving screw 6 through a bearing, and the driving screw 6 is vertically arranged and coaxial with the positioning block 5. The driving screw rod 6 penetrates through the inner part of the inner ring 12 and is inserted into the accommodating cavity 21, and a driving block 61 is connected to the driving screw rod 6 in a threaded mode. To facilitate rotation of the drive screw 6, a knob 62 is fixed to the top end of the drive screw 6.

Referring to fig. 3, the collecting box 7 is placed in the accommodating cavity 21, the collecting box 7 is arranged in a conical shape with the tip end facing downwards, the upper side of the collecting box 7 is open, the collecting box 7 is of a porous structure, and the collecting box 7 is coaxial with the embedded pipe 3.

After rainwater flows into the accommodating cavity 21, then flows into the collecting box 7, the collecting box 7 filters the rainwater, and the filtered rainwater flows into the embedded pipe 3, so that the filtered rainwater is collected through the embedded pipe 3, and the water saving resource is facilitated.

Referring to fig. 3 and 6, a protective cover 8 is connected to the upper surface of the collection box 7, and the protective cover 8 is coaxially disposed with the drive screw 6 and the collection box 7, respectively. The protective cover 8 comprises a plurality of telescopic plates 81, and the plurality of telescopic plates 81 are distributed along the circumferential direction of the collecting box 7.

Referring to fig. 6 and 7, the telescopic plate 81 includes a fixed plate 811 and a rotating plate 812, the fixed plate 811 and the rotating plate 812 are arc-shaped plates, and a plurality of the fixed plates 811 are uniformly distributed around the axis of the driving screw 6 with a space between adjacent fixed plates 811. The bottom wall of the fixed plate 811 is fixedly connected to the upper end surface of the collecting box 7, and the bottom wall of the rotating plate 812 is slidably attached to the upper end surface of the collecting box 7. One planar side wall of the fixing plate 811 is closed, and the other planar side wall is provided with an arc-shaped accommodating groove 813, and the accommodating groove 813 penetrates through to the top wall and the bottom wall of the fixing plate 811. So that the inside of the fixing plate 811 is hollow. The rotating plate 812 can rotate into the receiving groove 813 when rotating around the axis of the shield 8.

The receiving grooves 813 guide the rotation of the rotating plate 812, thereby improving the stability of the rotating plate 812 during rotation.

Rotate rotor plate 812 to the holding tank 813 in for have the space between the adjacent fixed plate 811, thereby the rainwater of being convenient for gets into protection casing 8 and gets into and collect box 7, rotate rotor plate 812 outside holding tank 813, make rotor plate 812 contradict in adjacent fixed plate 811, be convenient for seal the circumference of protection casing 8.

Referring to fig. 7, a guide groove 814 is formed on the surface of the fixing plate 811 facing the inside of the shield 8, the guide groove 814 is an arc-shaped groove, the guide groove 814 is communicated with the accommodating groove 813, a driving rod 63 is fixedly connected between the rotating plate 812 and the driving block 61, the driving rod 63 is inserted into the guide groove 814, and the driving rod 63 slides in the guide groove 814 when rotating along with the driving block 61. The guide groove 814 guides the driving rod 63, so that the stability of the driving rod 63 during rotation is improved, and the stability of the rotating plate 812 during rotation is further improved.

Referring to fig. 3 and 6, a regular hexagonal guide ring groove 51 is vertically formed in the bottom wall of the positioning block 5, a regular hexagonal lifting sleeve 52 is slidably disposed in the guide ring groove 51, the driving screw 6 coaxially penetrates through the lifting sleeve 52, and a gap is formed between the driving screw 6 and the inner wall of the lifting sleeve 52.

Referring to fig. 6 and 7, the top end of the fixing plate 811 is fixedly connected to the bottom wall of the lifting sleeve 52, and the top end of the rotating plate 812 is rotatably attached to the bottom wall of the lifting sleeve 52.

When needs cleared up the impurity in collecting box 7, the staff rotates drive screw 6, drive screw 6 drives drive block 61 and rotates, drive block 61 drives a plurality of actuating levers 63 and rotates, actuating lever 63 drives rotor plate 812 and rotates, contradict in adjacent fixed plate 811 when rotor plate 812, the circumference of protection casing 8 is in the encapsulated situation this moment, the effect of sheltering from is played to the upside of collecting box 7 to protection casing 8, thereby reduced the impurity in the collection box 7 and spilled the possibility of collecting in the box 7.

The rotating plate 812 is abutted against the adjacent fixing plate 811 and cannot continue to rotate, so that the rotation of the driving block 61 is limited, the driving block 61 rises along the axial direction of the driving screw 6, the driving block 61 drives the rotating plate 812 to rise, the rotating plate 812 drives the lifting sleeve 52 to rise, the lifting sleeve 52 drives the fixing plate 811 to rise, and the fixing plate 811 drives the collecting box 7 to rise. When the outer wall of the protective cover 8 is abutted against the clasping blocks 121, the protective cover 8 drives the clasping blocks 121 to overcome the elastic force of the elastic piece 13 to be away from each other, so that the protective cover 8 and the collecting box 7 are gradually separated from the grate component 1 upwards.

Because the driving screw 6 has self-locking property, the protective cover 8 and the collecting box 7 are not easy to slide down under the action of gravity, and the stability of the lifting of the collecting box 7 is improved.

When the holding blocks 121 are gradually far away from each other, the positioning block 5, the fixing ring 4 and the fixing rod 42 are pulled upwards after the inner ring 12 is unfolded, and therefore the positioning block 5 is detached from the grate component 1. The positioning block 5 drives the driving screw rod 6, the protective cover 8 and the collection box 7 to move upwards, so that the collection box 7 is separated from the containing cavity 21 and the grate component 1. Then, the driving screw 6 is rotated again so that the rotating plate 812 is received in the receiving groove 813, thereby opening the protection cover 8, facilitating the pouring of the foreign substances in the collecting box 7, and facilitating the cleaning of the foreign substances in the collecting box 7.

Because the spacing between the collecting box 7 and the positioning block 5 is gradually reduced in the process of taking the collecting box 7 out, the vertical length of the whole body formed by the positioning block 5, the driving screw 6 and the collecting box 7 is shortened, and the collecting box 7 can be conveniently taken out from the accommodating cavity 21 by a worker.

To collect box 7 and take out the back from holding chamber 21, a plurality of blocks 121 of embracing are held tightly under the drive effect of elastic ring again to grate subassembly 1 continues to filter the rainwater, makes the upside that holds chamber 21 not be in long-time open state, has reduced the possibility that the impurity of great volume drops to holding in the chamber 21, has also avoided the possibility that the wheel card of pedestrian or vehicle held in chamber 21 simultaneously, has improved the security.

When putting in the chamber 21 with collecting box 7, rotate drive screw 6 for rotating plate 812 gets into holding tank 813 completely after, rotating plate 812 can't continue to rotate, thereby makes the driving block 61 descend, and driving block 61 drives actuating lever 63, protection casing 8, the synchronous decline of collecting box 7.

By contracting or extending the distance between the positioning block 5 and the collecting box 7, the effect of facilitating the disassembly or the assembly of the collecting box 7 is achieved.

Referring to fig. 3, 4 and 8, in addition, in order to improve the stability when the protective cover 8 drives the clasping block 121 to move, an abutting inclined plane 123 is arranged at the joint of the inner wall of the clasping block 121 facing the driving screw 6 and the bottom wall, and abuts against the abutting inclined plane 123 when the protective cover 8 rises, so that the clasping block 121 is driven to move. The contact area between the clasping block 121 and the protective cover 8 is increased by the abutting inclined plane 123, and the stability of the protective cover 8 when the clasping block 121 is driven to move is improved.

The implementation principle of the municipal bridge water draining device easy to clean is as follows: rainwater flows into the accommodating chamber 21 through the gap between the adjacent telescopic bars 14. Therefore, larger impurities are blocked outside the accommodating cavity 21 by the grate component 1, and smaller impurities flow into the accommodating cavity 21 along with rainwater.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an easy municipal bridge sluicing device of clearing up, includes grate subassembly (1), holds box (2), pre-buried pipe (3), the inner chamber that holds box (2) is for leaking hopper-shaped chamber (21) that holds, grate subassembly (1) connect in hold the top of box (2), pre-buried pipe (3) communicate in the bottom that holds box (2), grate subassembly (1) includes outer ring (11), inner ring (12), elastic component (13), inner ring (12) include a plurality of locking blocks (121), locking blocks (121) are followed the radial sliding of outer ring (11) sets up, elastic component (13) are used for driving a plurality of locking blocks (121) draw close each other, it is provided with in box (2) and collects box (7), collect box (7) and be porous structure, its characterized in that: the grate component (1) is detachably connected with a positioning block (5), the positioning block (5) is connected with a driving screw (6) in a rotating mode, the driving screw (6) is vertically arranged, the driving screw (6) penetrates through the inner ring (12) and then is inserted into the accommodating cavity (21), the driving screw (6) is connected with a driving block (61) in a threaded mode, the top of the collecting box (7) is connected with a protective cover (8), the protective cover (8) is arranged in a truncated cone shape with the pointed end upwards, the protective cover (8) comprises a plurality of expansion plates (81), the expansion plates (81) are distributed along the circumferential direction of the collecting box (7), the expansion plates (81) comprise a fixing plate (811) and a rotating plate (812), the fixing plate (811) is fixed on the collecting box (7), and the rotating plate (812) is connected with the fixing plate (811) in a rotating mode, the rotating plate (812) is connected with the driving block (61), the positioning block (5) is connected with a lifting sleeve (52) in a sliding mode along the vertical direction, the top end of the fixing plate (811) is fixed on the lifting sleeve (52), and the top end of the rotating plate (812) abuts against the lifting sleeve (52).

2. The easy-to-clean municipal bridge water drainage device according to claim 1, wherein: the driving screw rod (6) penetrates through the lifting sleeve (52).

3. The easy-to-clean municipal bridge water drainage device according to claim 2, wherein: the cross section of the lifting sleeve (52) is polygonal.

4. The easy-to-clean municipal bridge water drainage device according to claim 1, wherein: an accommodating groove (813) is formed in one side wall of the fixing plate (811), and the rotating plate (812) can rotate into the accommodating groove (813).

5. The easy-to-clean municipal bridge water drainage device according to claim 3, wherein: the driving rod (63) is connected between the rotating plate (812) and the driving block (61), a guide groove (814) is formed in one side, facing the driving block (61), of the fixing plate (811), the guide groove (814) is communicated with the accommodating groove (813), and when the driving rod (63) rotates around the driving screw rod (6), the driving rod (63) slides in the guide groove (814).

6. The easy-to-clean municipal bridge water drainage device according to claim 1, wherein: an expansion rod (14) is connected between the clasping block (121) and the outer ring (11), and a plurality of expansion rods (14) point to the center of the outer ring (11).

7. The easy-to-clean municipal bridge water drainage device according to claim 1, wherein: embrace tight piece (121) orientation the lateral wall of drive screw (6) is provided with conflict inclined plane (123) with the linking department of diapire, conflict inclined plane (123) be used for with the outer wall conflict of protection casing (8).

8. The easy-to-clean municipal bridge water drainage device according to claim 1, wherein: the up end of outer loop (11) is provided with solid fixed ring (4), the diapire of solid fixed ring (4) is fixed with fixed block (41), the up end of outer loop (11) is opened has the confession fixed block (41) insert slot (111) of establishing, gu fixed ring (4) with fixedly connected with dead lever (42) between locating piece (5).