CN115095529A

CN115095529A - Urban underground drainage pump capable of preventing foreign matter blockage

Info

Publication number: CN115095529A
Application number: CN202210640379.7A
Authority: CN
Inventors: 倪华珑; 朱加轩; 张利利; 余玲
Original assignee: Anhui Jinzheng Pump Technology Co ltd
Current assignee: Anhui Jinzheng Pump Technology Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-23
Also published as: ZA202300302B; WO2023236455A1

Abstract

The invention discloses an urban underground drainage pump capable of preventing foreign matter blockage, and relates to the technical field of drainage pump drainage, which comprises a bottom plate and a pipe body, wherein a motor is fixed on one side of the top of the bottom plate through a bolt, the pipe body is arranged at the output end of the motor, a liquid inlet is formed in one side of the pipe body, a fixed column is uniformly fixed on one side of the liquid inlet through spot welding, and a vibration mechanism is fixed on one end of the fixed column through spot welding; the impeller in the pipe body is driven to rotate by the rotation of the motor, so that the whole water flow with foreign matters enters the baffle plate from the liquid inlet, the sealing arc plate connected to one side of the whole baffle plate starts to slide on the inner wall of the pipe body, the originally sealed liquid through port is opened, the whole foreign matters blocked in the liquid through port are pushed out by the pushing column, the foreign matters on the baffle plate are pushed into the sewage discharge groove connected to one side of the liquid through the driving of the water flow, and the phenomenon that the foreign matters are contacted with the impeller under the driving of the water flow to cause the winding damage of the whole impeller by the foreign matters is avoided.

Description

Urban underground drainage pump capable of preventing foreign matter blockage

Technical Field

The invention relates to the technical field of drainage pump pollution discharge, in particular to an urban underground drainage pump capable of preventing foreign matter blockage.

Background

The drainage pump is one kind of centrifugal pump, and the theory of operation of whole centrifugal pump is: the liquid obtains energy under the action of inertial centrifugal force by virtue of the impeller rotating at high speed so as to improve the pressure intensity, the pump body and the water inlet pipe are filled with water before the water pump works, the cavitation phenomenon is prevented, when the impeller rotates rapidly, the blades promote the water to rotate rapidly, the rotating water flies away from the impeller under the action of the centrifugal force, after the water in the pump is thrown out, the central part of the impeller forms a vacuum area, the water in a water source is pressed into the water inlet pipe through a pipe network under the action of atmospheric pressure (or water pressure), and continuous water pumping can be realized after circulation is not completed;

however, due to different working environments of the water pumps, part of urban drainage pumps are easy to damage, and the main reason is that more foreign matters are carried in urban underground liquid, so that the situation that fan blades in the water pumps are blocked easily is caused, and the problems of unsmooth operation of the fan blades and burning loss of motors are caused;

aiming at the foreign matters frequently faced in the underground drainage pump, the foreign matters are classified into fine-thread foreign matters such as plastic bag garbage, aquatic weeds and the like and metal garbage;

1. the soft foreign matters made of plastic bags and the like are the most easily blocking the drainage pump and are one of the foreign matters floating most in water, and usually, a rotary blade is arranged at the front end of the drainage pump to crush the complete plastic entering the water pump and then discharge the plastic by the drainage pump, but the crushed plastic is wound on a rotating shaft of an impeller in such a way, and meanwhile, the crushed plastic is conveyed to other places by the drainage pump to cause the problem of environmental pollution;

2. the rotation of the impeller is easily blocked by the fine-thread foreign matters such as waterweeds, hairlines and the like, and the rotating speed of the impeller is greatly reduced due to the winding of the fine threads after the drainage pump works for a long time, so that partial drainage pumps directly drain water for the foreign matters without treatment;

3. for the garbage made of metal materials, the interception work is well done at the water inlet of the water pump, and the phenomenon that the metal damages the impeller of the drainage pump basically cannot occur;

therefore, the urban underground drainage pump capable of preventing foreign matter blockage is provided.

Disclosure of Invention

The invention aims to provide an urban underground drainage pump capable of preventing foreign matter blockage, which is provided for solving the problems in the background technology:

1. the impeller in the pipe body is driven to rotate through the rotation of the motor, so that the whole water flow with foreign matters enters the baffle plate from the liquid inlet, the liquid inlet on the upper part of the whole baffle plate is blocked, the originally sealed liquid inlet is opened, when the whole sealing arc plate slides on the inner wall of the pipe body, the foreign matters blocked in the liquid inlet are pushed out by the abutting column, the foreign matters on the baffle plate are flushed into the sewage discharge groove connected with one side of the liquid inlet through the driving of the water flow, and the problem that the foreign matters are contacted with the impeller under the driving of the water flow is avoided;

2. the baffle plate arranged in the pipe body intercepts the filamentous foreign matters in the water flow, so that the whole filamentous foreign matters are hung on the clamping column, and the whole connecting disc is driven by the hexagonal rotary column to vibrate left and right continuously, so that the whole blade vibrates left and right in the through groove to cut, the filamentous foreign matters hung on the clamping column are cut up, and the problem that the whole filamentous foreign matters are wound on the impeller is avoided;

3. part of foreign matters sucked by the drainage pump are uniformly placed into the sewage discharge tank for storage by the sewage storage tank arranged on the whole pipe body, similar to floating foreign matters such as plastic bags and the like, so that the problem that the whole plastic garbage is discharged into other places by the drainage pump again to cause secondary pollution to the environment by the foreign matters is solved;

in order to achieve the purpose, the invention provides the following technical scheme:

a city underground drainage pump capable of preventing foreign matter blockage comprises a bottom plate and a pipe body, wherein a motor is fixed on one side of the top of the bottom plate through a bolt, the pipe body is installed at the output end of the motor, a liquid inlet is formed in one side of the pipe body, a fixing column is uniformly fixed on one side of the liquid inlet through spot welding, and a vibration mechanism is fixed at one end of the fixing column through spot welding;

the vibration mechanism comprises a box body, a sliding plate, connecting covers, springs and connecting shafts, wherein one end of each fixing column is fixed with the box body through spot welding, the sliding plate is positioned on the inner wall of the box body and is connected with the fixing column in a sliding mode, one side of the sliding plate is fixed with the connecting shaft through spot welding, one end of the connecting shaft penetrates through one side of the box body and extends into the box body, the connecting covers are uniformly and symmetrically fixed on the inner walls of the two sides of the box body through spot welding, and the springs are fixed on the opposite surfaces of the two connecting covers through spot welding;

the utility model discloses a pipe body, including connecting axle, connecting axle and support post, the one end of connecting axle is fixed with the baffle through spot welding, and is located one side of baffle and evenly offers logical liquid mouth, one side of baffle is fixed with sealed arc board through spot welding, and is located one side of sealed arc board and is fixed with the sealing membrane through the adhesion, the inner wall of body is fixed with the support frame through spot welding, and is located one side of support frame and evenly is fixed with the support post through spot welding.

Furthermore, a liquid through port is formed in one side of the top of the pipe body, one side of the sealing arc plate is connected with the inner wall of the pipe body in a sliding mode, the sealing arc plate is connected with the liquid through port in an abutting mode, and the abutting column is arranged corresponding to the liquid through port.

Further, the top of body is passed through the bolt fastening and is had the dirt case of depositing, and is located to deposit and has seted up the groove of decontaminating in the dirt incasement, the inslot of decontaminating and the bottom inner wall that is located the dirt case of depositing are fixed with the baffle through spot welding, lead to the liquid mouth and put the dirt groove and communicate mutually.

Further, the inner wall of body is fixed with the striker plate through spot welding, and is located the striker plate on the symmetry evenly seted up logical groove, the both sides inner wall that leads to the groove evenly is fixed with the card post through spot welding, the both sides that just are located logical groove on the striker plate are fixed with the rubber slab through the adhesion, the central point of striker plate puts the department and is fixed with the fore-set through the adhesion.

Further, cutting mechanism is installed to the inner wall of body, cutting mechanism includes dead lever, pivot, connection pad, blade, hexagonal rotary column and rocks the membrane, the inner wall of body is fixed with the dead lever through spot welding, and lies in swing joint on the dead lever and has the pivot, the one end of pivot has the connection pad through bearing swing joint, and lies in one side of connection pad and evenly rotates and be connected with the blade, the other end swing joint of pivot has hexagonal rotary column, and lies in one side of hexagonal rotary column and evenly is fixed with through the adhesion and rocks the membrane.

Furthermore, a liquid outlet is formed in the other side of the pipe body, a locking ring is sleeved on the outer wall of the pipe body and located at the liquid inlet, a connecting pipe is communicated with one side of the sewage storage box, and one end located at the connecting pipe penetrates through the sewage storage box and is communicated with the sewage discharge groove.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, the impeller in the pipe body is driven to rotate by the rotation of the motor, so that the whole water flow with foreign matters enters the baffle plate from the liquid inlet, the liquid through hole on the upper part of the whole baffle plate is blocked, meanwhile, the resistance on the whole baffle plate is increased, the sealing arc plate connected with one side of the whole baffle plate starts to slide on the inner wall of the pipe body, so that the originally sealed liquid through hole is opened, when the whole sealing arc plate slides on the inner wall of the pipe body, the whole foreign matters blocked in the liquid through hole are pushed out by the butting column, the foreign matters on the baffle plate are flushed into the sewage discharge groove connected with one side of the liquid through hole by the drive of the water flow, the foreign matters are prevented from contacting with the impeller under the drive of the water flow, the whole impeller is wound and damaged by the foreign matters, and after the foreign matters on the whole baffle plate are discharged, the spring in the box body pushes the whole connecting shaft to move outwards, so that the liquid through hole can be blocked by the whole sealing arc plate, the opening of the liquid through opening is avoided, and the drainage of the whole drainage pump is influenced;

2. according to the invention, the filamentous foreign matters in water flow are intercepted by the baffle plate arranged in the pipe body, so that the whole filamentous foreign matters are hung on the clamping column, meanwhile, the blade is arranged on one side of the whole through groove, the whole blade is fixed on the connecting disc, the whole connecting disc is driven by the hexagonal rotary column to continuously vibrate left and right, so that the whole blade vibrates left and right in the through groove for cutting, the filamentous foreign matters hung on the clamping column are cut, the whole filamentous foreign matters are prevented from being wound on the impeller, and the rotating speed of the whole impeller is greatly reduced after the drainage pump works for a long time;

3. according to the invention, part of the foreign matters pumped by the drainage pump are uniformly placed in the sewage discharge tank for storage by the sewage storage box arranged on the whole pipe body, similar to floating foreign matters such as plastic bags and the like, so that the phenomenon that the whole plastic garbage is discharged into other places by the drainage pump again to cause secondary pollution of the foreign matters is avoided.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an urban underground drainage pump for preventing foreign matter blockage according to the invention;

FIG. 2 is a schematic diagram of the cross-sectional structure of the urban underground drainage pump for preventing foreign matter blockage according to the invention;

FIG. 3 is an enlarged view of the structure at the point A;

FIG. 4 is a schematic view of the connection structure of the connection shaft and the sewage draining mechanism of the present invention;

FIG. 5 is an enlarged view of the structure at B of the present invention;

FIG. 6 is a side view of the striker plate of the present invention;

FIG. 7 is a schematic view of a blade and connecting disc connection structure according to the present invention;

FIG. 8 is a schematic view of a connection structure of a hexagonal rotary post and a shaking membrane according to the present invention.

In the figure: 1. a base plate; 2. a motor; 3. a pipe body; 4. a liquid inlet; 5. a vibration mechanism; 501. a box body; 502. a slide plate; 503. a connecting cover; 504. a spring; 505. a connecting shaft; 6. fixing a column; 7. a locking ring; 8. a sewage draining mechanism; 801. a baffle plate; 802. a liquid through hole; 803. sealing the arc plate; 804. a sealing film; 805. a support frame; 806. supporting columns; 9. a sewage storage box; 10. a sewage discharge tank; 11. a liquid through port; 12. a connecting pipe; 13. a partition plate; 14. a striker plate; 15. a through groove; 16. clamping the column; 17. a rubber plate; 18. a top pillar; 19. a cutting mechanism; 191. fixing the rod; 192. a rotating shaft; 193. a connecting disc; 194. a blade; 195. six-side rotary columns; 196. shaking the membrane; 20. and a liquid outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution:

example 1:

the whole urban underground drainage pump can cause that the impeller in the whole drainage pump is clamped and can not rotate because of plastic garbage and some linear objects blocked in the drainage pipeline in the use process, the interception mechanism is additionally arranged at the water inlet of the existing drainage pump, the effect of preventing foreign matters from entering the drainage pump pipe body 3 is achieved, however, the water flow entering the tube 3 is greatly reduced because the water source at the water inlet is blocked by the foreign matters, and the foreign matters are crushed by the rotating blade 194 at the other part, but a part of residues are wound on the rotating shaft 192 of the impeller, the pump body can be damaged when the drainage pump works for a long time, therefore, the invention adopts a method of collecting larger foreign matters and intercepting and breaking filiform foreign matters, thereby not only protecting the drainage pump, but also recovers part of large plastic garbage, thereby avoiding the secondary environmental pollution caused by discharging part of plastic garbage into other regions by a drainage pump;

in the specific operation, as shown in fig. 1-2, the whole pump body is fixed on the ground through a bottom plate 1, a pipeline is additionally arranged on a liquid inlet 4 of the whole pump body, the whole pipeline is sleeved at the front end of a pipe body 3, a lock ring 7 is additionally arranged at the front end of the whole pipe body 3, and a worker can fix the external pipeline on the pipe body 3 by rotating a bolt on the lock ring 7;

the front end of the whole pipe body 3 is also additionally provided with a vibration mechanism 5, when the motor 2 starts to drive the impeller in the pipe body 3 to rotate, water flow enters the pipe body 3 through an external pipeline, and a fixed column 6 arranged at the front end of the pipe body 3 plays a role in intercepting one layer, so that the impeller of the whole drainage pump is prevented from being damaged due to the fact that some harder materials enter the pipe body 3;

after a part of plastic bags in water enter the tubular body 3, because the connecting shaft 505 is slidably connected in the whole box body 501, and the baffle 801 is installed on the whole connecting shaft 505, the whole plastic bags fall on one side of the baffle 801 instead of directly entering the other side of the tubular body 3, and the baffle 801 is prevented from intercepting water flow, a plurality of liquid through holes 802 are formed in one side of the baffle 801, so that the whole water flow can flow in the tubular body 3, the whole baffle 801 is as shown in fig. 4, the whole panel surface is arranged in an inclined plane, when plastic garbage falls on the panel surface, the plastic bags can flow to the flat part at the top of the whole baffle 801 along with the water flow, after the drainage pump works for a long time, a large amount of plastic garbage can fall on the whole baffle 801, so that the water flow on the whole baffle 801 is not smooth, meanwhile, the whole baffle 801 can start to move to the right side due to the blockage of the plastic bags, and the sealing plate 803 is installed at the top of the whole baffle 801, the installation of the whole sealing arc plate 803 is to shield the liquid through port 11 arranged at the top of the pipe body 3, so as to prevent water flow from flowing into the dirt storage tank 9, which reduces the water pressure in the whole pipe body 3, when enough plastic garbage is intercepted on the whole baffle 801, the sealing arc plate 803 which originally shields the liquid through opening 11 is slowly opened in the process that the whole baffle 801 moves to the right, meanwhile, a support frame 805 is arranged in the whole pipe body 3, the support columns 806 are arranged on the whole support frame 805, the support columns 806 arranged on the whole support frame 805 are arranged in one-to-one correspondence with the liquid through ports 11 formed in the baffle 801, after the whole baffle 801 moves to the right, the prop 806 on the whole support frame 805 pushes out the plastic garbage originally blocked in the liquid through hole 802, and the plastic garbage accumulated on the whole baffle 801 enters the sewage storage tank 9 through the liquid through hole 11 along with the water flow because the liquid through hole 11 on the top of the whole pipe body 3 is in an open state;

the whole sewage storage tank 9 is internally provided with a sewage discharge tank 10, a partition plate 13 is arranged in the sewage discharge tank 10, when plastic garbage enters the sewage discharge tank 10 along water flow, the plastic garbage can fall to the left side of the partition plate 13 to be stored, the additionally arranged partition plate 13 is used for preventing the plastic garbage from flowing back and falling to the position of the liquid through port 11 to block the next entering of other plastic garbage, when the plastic garbage is fully stored at one side of the whole sewage storage tank 10, one side of the whole sewage storage tank 9 is connected with a connecting pipe 12, the pipe diameter of the whole connecting pipe 12 is large, the plastic garbage in the whole sewage storage tank 10 can be discharged into a tank body 501 special for storing the plastic garbage, and the plastic garbage is prevented from being discharged by a drainage pump to cause secondary pollution of the plastic garbage;

when plastic garbage on the whole baffle 801 is discharged, at the moment, the liquid through holes 802 on the whole baffle 801 are in an open state, meanwhile, the thrust of water flow on the whole baffle 801 is reduced, because the connecting shaft 505 at one side of the whole baffle 801 is connected with the sliding plate 502 in the box body 501, the connecting covers 503 are uniformly arranged on the inner walls of the whole sliding plate 502 and the box body 501, meanwhile, springs 504 are arranged in the connecting covers 503, when more plastic garbage exists on the baffle 801, the baffle 801 continuously pulls the sliding plate 502 in the whole box body 501 through the connecting shaft 505, because the whole sliding plate 502 and the inner wall of the box body 501 are provided with a plurality of groups of springs 504, after the plastic garbage on the baffle 801 is discharged, the thrust on the whole baffle 801 is reduced, the springs 504 pull the baffle 801 moving to the right back, so that the sealing arc plate 803 on the whole baffle 801 seals the liquid through hole 11 again, and a sealing film 804 is adhered on the whole sealing arc plate 803, make whole sealed arc board 803 to the sealed effect improvement of logical liquid mouth 11, avoid whole logical liquid mouth 11 weeping to cause the water pressure in whole body 3 to reduce, wait until after accumulating a large amount of plastic refuse once more on whole baffle 801, whole logical liquid mouth 11 is opened, discharge plastics into the dirt discharge tank 10 once more, repeat above-mentioned operation all the time, make in the whole drainage pump discharged water body, plastic refuse falls to minimumly, make whole city underground drainage pump can also intercept the plastic bag of aquatic and collect in the drainage, the environment has also been protected in the time of the protection drainage pump body.

Example 2:

as threadlike garbage is also stored in the water flow, the garbage is easily wound on a rotary column of an impeller, as shown in fig. 5-8, part of threadlike foreign matters enter a pipe body 3 close to one side of the impeller through a liquid through hole 802 on a sewage discharge mechanism 8 and fall onto a baffle plate 14 along the water flow, the shape of the whole baffle plate 14 is as shown in fig. 6, a plurality of groups of through grooves 15 are formed in the whole baffle plate 14, a plurality of groups of clamping columns 16 are arranged on the whole through groove 15, the whole clamping column 16 is arranged to intercept the threadlike foreign matters in the whole water flow, a top column 18 is arranged at the central position of the baffle plate 14, the whole top column 18 is similar to a cone, and the threadlike garbage is dispersed on the surrounding clamping columns 16 through the installation of the top column 18;

a cutting mechanism 19 is arranged in the pipe body 3 at one side of the whole striker plate 14, the whole cutting mechanism 19 is responsible for cutting off the filaments hung on the clamping column 16 and preventing the filaments from winding on the impeller, the whole cutting mechanism 19 is divided into two parts, one part is responsible for cutting the filaments, the other part provides power for the rotation of the blade 194, a fixing rod 191 is arranged at one side of the whole striker plate 14, a connecting disc 193 is arranged at the front end of the whole fixing rod 191, the shape of the whole connecting disc 193 is shown in figure 7, the blade 194 corresponding to the through groove 15 is arranged on the whole connecting disc 193, meanwhile, the blade 194 is prevented from being damaged by continuous vibration in the through groove 15, the rubber plate 17 is arranged on the whole through groove 15, the hardness of the whole rubber plate 17 is low, the blade 194 is protected, the whole blade 194 is rotatably connected with the connecting disc 193, but the whole blade 194 has a small rotation amplitude on the connecting disc 193, and the rotation of the blade 194 is set to enable the filaments in the whole through groove 15 to be cut;

hexagonal rotary column 195 is installed to the opposite side of whole dead lever 191, whole hexagonal rotary column 195 is as shown in fig. 8, one side that is located hexagonal rotary column 195 evenly installs and rocks membrane 196, whole membrane 196 that rocks when flowing in rivers, constantly rock and drive whole hexagonal rotary column 195 and rock, whole hexagonal rotary column 195 is connecting connection pad 193 through pivot 192, so whole connection pad 193 also can rock and constantly rock along with hexagonal rotary column 195, thereby constantly provide power for blade 194 cutting filament, whole blade 194 is with the fine back of cutting on the card post 16, the filament that cuts off is discharged from liquid outlet 20 along rivers, accomplish the drainage work of whole drain pump, prevented simultaneously that the foreign matter from blockking up the water pump.

The foregoing is merely illustrative and explanatory of the structure of the invention, and various modifications, additions or substitutions in the form of the specific embodiments described may be made by those skilled in the art without departing from the structure or scope of the invention as defined in the accompanying claims.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not exhaustive and do not limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a prevent urban underground drainage pump that foreign matter blockked up, includes bottom plate (1) and body (3), its characterized in that: a motor (2) is fixed on one side of the top of the bottom plate (1) through a bolt, a pipe body (3) is installed at the output end of the motor (2), a liquid inlet (4) is formed in one side of the pipe body (3), fixing columns (6) are uniformly fixed on one side of the liquid inlet (4) through spot welding, and a vibration mechanism (5) is fixed at one end of each fixing column (6) through spot welding;

the vibration mechanism (5) comprises a box body (501), a sliding plate (502), connecting covers (503), springs (504) and a connecting shaft (505), one end of a fixing column (6) is fixed with the box body (501) through spot welding, the sliding plate (502) is slidably connected with the inner wall of the box body (501), one side of the sliding plate (502) is fixed with the connecting shaft (505) through spot welding, one end of the connecting shaft (505) penetrates through one side of the box body (501) and extends into the pipe body (3), the connecting covers (503) are uniformly and symmetrically fixed on the inner walls of two sides of the box body (501) through spot welding, and the springs (504) are fixed on opposite surfaces of the two connecting covers (503) through spot welding;

connecting axle (505) are located the one end of body (3) and install sewage mechanism (8), sewage mechanism (8) are including baffle (801), logical liquid hole (802), sealed arc board (803), seal membrane (804), support frame (805) and support post (806), the one end of connecting axle (505) is fixed with baffle (801) through spot welding, and is located one side of baffle (801) and has evenly seted up logical liquid mouth (11), one side of baffle (801) is fixed with sealed arc board (803) through spot welding, and is located one side of sealed arc board (803) and is fixed with seal membrane (804) through the adhesion, the inner wall of body (3) is fixed with support frame (805) through spot welding, and is located one side of support frame (805) and evenly is fixed with support post (806) through spot welding.

2. The urban underground drainage pump capable of preventing foreign matter blockage according to claim 1, is characterized in that: liquid passing port (11) is formed in one side of the top of the pipe body (3), one side of the sealing arc plate (803) is connected with the inner wall of the pipe body (3) in a sliding mode, the sealing arc plate (803) is connected with the liquid passing port (11) in an abutting mode, and the abutting column (806) is arranged corresponding to the liquid passing port (11).

3. The urban underground drainage pump capable of preventing foreign matter blockage according to claim 2, wherein the drainage system comprises: the top of body (3) is through the bolt fastening have deposit dirty case (9), and is located and has seted up in depositing dirty case (9) and has put dirty groove (10), the bottom inner wall that just is located deposit dirty case (9) in putting dirty groove (10) is fixed with baffle (13) through spot welding, lead to liquid mouth (11) and put dirty groove (10) and be linked together.

4. A municipal underground drainage pump for preventing foreign matter blockage according to claim 3, wherein: the inner wall of body (3) is fixed with striker plate (14) through spot welding, and is located striker plate (14) and goes up the symmetry and evenly seted up logical groove (15), the both sides inner wall that leads to groove (15) evenly is fixed with card post (16) through spot welding, the both sides that just are located logical groove (15) on striker plate (14) are fixed with rubber slab (17) through the adhesion, the central point of striker plate (14) puts the department and is fixed with fore-set (18) through the adhesion.

5. The urban underground drainage pump capable of preventing foreign matter blockage according to claim 2, wherein the drainage system comprises: cutting mechanism (19) are installed to the inner wall of body (3), cutting mechanism (19) include dead lever (191), pivot (192), connection pad (193), blade (194), hexagonal rotary column (195) and rock membrane (196), the inner wall of body (3) is fixed with dead lever (191) through spot welding, and is located swing joint pivot (192) on dead lever (191), the one end of pivot (192) has connection pad (193) through bearing swing joint, and is located one side of connection pad (193) and evenly rotates and is connected with blade (194), the other end swing joint of pivot (192) has hexagonal rotary column (195), and is located one side of hexagonal rotary column (195) and evenly is fixed with through the adhesion and rocks membrane (196).

6. The urban underground drainage pump capable of preventing foreign matter blockage according to claim 1, is characterized in that: a liquid outlet (20) is formed in the other side of the pipe body (3), a locking ring (7) is sleeved on the outer wall of the pipe body (3) and located at the liquid inlet (4), a connecting pipe (12) is communicated with one side of the sewage storage box (9), and one end located at the connecting pipe (12) penetrates through the sewage storage box (9) and is communicated with the sewage discharge groove (10).