CN111206665B - Town road drainage device - Google Patents

Town road drainage device Download PDF

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Publication number
CN111206665B
CN111206665B CN202010167229.XA CN202010167229A CN111206665B CN 111206665 B CN111206665 B CN 111206665B CN 202010167229 A CN202010167229 A CN 202010167229A CN 111206665 B CN111206665 B CN 111206665B
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CN
China
Prior art keywords
sewage
drainage channel
gear
drainage
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN202010167229.XA
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Chinese (zh)
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CN111206665A (en
Inventor
不公告发明人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Landscape Engineering Co ltd
Original Assignee
Zhuji Xinfu Water Supply And Drainage Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhuji Xinfu Water Supply And Drainage Equipment Co ltd filed Critical Zhuji Xinfu Water Supply And Drainage Equipment Co ltd
Priority to CN202010167229.XA priority Critical patent/CN111206665B/en
Publication of CN111206665A publication Critical patent/CN111206665A/en
Application granted granted Critical
Publication of CN111206665B publication Critical patent/CN111206665B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F1/00Methods, systems, or installations for draining-off sewage or storm water
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/04Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/04Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401Gullies for use in roads or pavements
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03FSEWERS; CESSPOOLS
    • E03F5/00Sewerage structures
    • E03F5/04Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
    • E03F5/0401Gullies for use in roads or pavements
    • E03F5/0404Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor

Abstract

The invention discloses a municipal road drainage device, which comprises a machine body, wherein a drainage channel is arranged in the machine body, the upper side of the drainage channel is communicated with the outside, the lower side of the drainage channel is communicated with a drainage system, the upper side of the drainage channel is provided with a sewage cover, the sewage cover is used for closing the drainage channel, the sewage cover is provided with uniform filtering holes which penetrate through the sewage cover up and down, and sewage is discharged into a drainage system through the filtering holes for output, when the rainfall amount is increased or the water discharge amount is increased, the sewage cover is lifted, the water flow is increased through the two filter plates, and the solid garbage in the sewage is filtered and squeezed for dehydration, after that, the dewatered garbage is automatically recycled through the collecting device, so that the garbage is prevented from blocking a drainage channel, and the sewage discharge adaptability and the drainage smoothness are improved.

Description

Town road drainage device
Technical Field
The invention relates to the technical field of drainage, in particular to a municipal road drainage device.
Background
The municipal road drainage device is a series of facilities for intercepting, draining or discharging ground water and underground water which endanger highways, and is a complete and smooth drainage system formed by reasonably planning and designing by combining conditions along the line. The present invention sets forth a device that solves the above problems.
Disclosure of Invention
The technical problem is as follows:
the traditional drainage device has simple structure, only a metal plate with a filter screen or a grid is arranged on the upper side of the sewer, and the size of the filter hole of the traditional drainage device cannot be adjusted, so that the traditional drainage device brings inconvenience for subsequent sewage treatment.
In order to solve the problems, the embodiment designs a municipal road drainage device, which comprises a machine body, wherein a drainage channel is arranged in the machine body, the upper side of the drainage channel is communicated with the outside, the lower side of the drainage channel is communicated with a drainage system, a sewage cover is arranged on the upper side of the drainage channel and is used for closing the drainage channel, uniform filtering holes which penetrate up and down are arranged on the sewage cover, sewage is drained into the drainage system through the filtering holes and is output, an annular ring groove is arranged in the end surface of the lower side of the sewage cover, first filtering plates are uniformly hinged in the ring groove, the adjacent first filtering plates are connected, the lower ends of the first filtering plates are hinged with second filtering plates, the lower ends of the second filtering plates are hinged and arranged in the drainage channel, a lifting device is arranged on the lower side of the sewage cover, and the lifting device controls the lifting of the sewage cover, the sewage lid rises the back, makes first filter with the second filter is straightened, then passes through first filter with solid waste in the second filter filtration sewage, sewage pass through the drain discharges, the drain periphery is equipped with collection device, collection device includes air pump and collecting box, first filter with the solid waste process after the second filter filters first filter with after the folding pressurized-water of second filter, through the air pump absorb extremely unified collection in the collecting box, the drain right side is equipped with transmission, transmission will the lift of sewage lid turns into the power of working in the collection device.
Preferably, the first filter plate and the second filter plate are provided with sewage filtering holes with diameters larger than the filtering holes.
Wherein, elevating gear including set firmly in horizontal pole that the level in the drain was placed, the horizontal pole internal fixation has the screw thread piece, the screw thread piece internal thread is installed the screw thread axle, screw thread epaxial end power is connected with driving motor, driving motor set firmly in the sewage lid.
The collecting device comprises an annular rotating cavity with an upward opening, an annular block is arranged in the rotating cavity in a rotating mode, a power groove is formed in the annular block, a power gear is arranged in the power groove in a rotating mode through a power rotating shaft, the lower end of the power gear is connected with a power motor fixedly arranged on the lower end wall of the power groove in a power connection mode, a lead screw is connected to the left side of the power gear in a threaded mode, the upper end of the lead screw is fixedly connected with the collecting box, a rotating ring in the shape of a ring is arranged on the upper side of the collecting box, an absorbing cavity is formed in the rotating ring, a connecting pipe is communicated between the absorbing cavity and the collecting box, an air pump is fixedly arranged in.
The transmission device comprises an extrusion chute with an upward opening, a rack is arranged in the extrusion chute in a sliding mode, an extrusion spring is fixedly arranged at the lower end of the rack, a transmission cavity is formed in the wall of the right end of the extrusion chute in a communicated mode, a left side is arranged in the transmission cavity in a rotating mode and is engaged with the rack, a first bevel gear is fixedly arranged on the front end face of the transmission gear, a second bevel gear is meshed with the front side of the first bevel gear, a gear rotating shaft is fixedly arranged at the center of the second bevel gear, the lower end of the gear rotating shaft is fixedly connected with the input end of a transmission, a rotating shaft is dynamically installed at the output end of the transmission, a rotating gear is.
The invention has the beneficial effects that: the sewage on the municipal road is filtered through the sewage cover and discharged through the drainage system, when the rainfall or the drainage is increased, the sewage cover rises, the water flow is increased through the two filter plates, solid garbage in the sewage is filtered and squeezed for dehydration, and then the dehydrated garbage is automatically recovered through the collection device, so that the blockage of a drainage channel is avoided, and the sewage discharge adaptability and the drainage smoothness are improved.
Drawings
For ease of illustration, the invention is described in detail by the following specific examples and figures.
FIG. 1 is a schematic view of the overall construction of a municipal road drainage apparatus of the invention;
FIG. 2 is a schematic view of the structure in the direction "A-A" of FIG. 1;
FIG. 3 is an enlarged view of "B" of FIG. 1;
fig. 4 is an enlarged structural view of "C" of fig. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, for ease of description, the orientations described below will now be defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The invention relates to a municipal road drainage device which is mainly used for drainage work, and the invention is further explained by combining the attached drawings of the invention:
the municipal road drainage device comprises a machine body 21, wherein a drainage channel 22 is arranged in the machine body 21, the upper side of the drainage channel 22 is communicated with the outside, the lower side of the drainage channel 22 is communicated with a drainage system, a sewage cover 33 is arranged on the upper side of the drainage channel 22, the sewage cover 33 is used for closing the drainage channel 22, uniform filtering holes 35 which penetrate through the drainage channel up and down are arranged on the sewage cover 33, sewage is discharged into the drainage system through the filtering holes 35 and is output, an annular groove 32 is arranged in the end surface of the lower side of the sewage cover 33, first filtering plates 31 are uniformly hinged in the annular groove 32, the adjacent first filtering plates 31 are connected, the lower end of each first filtering plate 31 is hinged with a second filtering plate 30, the lower end of each second filtering plate 30 is hinged and installed in the drainage channel 22, a lifting device 90 is arranged on the lower side of the sewage cover 33, and the lifting device 90 controls the lifting of the sewage cover 33, the sewage lid 33 rises the back, makes first filter 31 with second filter 30 is straightened, then passes through first filter 31 with second filter 30 filters solid waste in the sewage, and sewage passes through drain 22 discharges, drain 22 periphery is equipped with collection device 89, collection device 89 includes air pump 52 and collecting box 62, first filter 31 with the solid waste process after second filter 30 filters first filter 31 with the folding pressurized-water back of second filter 30, through air pump 52 absorb extremely unified collection in the collecting box 62, drain 22 right side is equipped with transmission 88, transmission 88 will the lift of sewage lid 33 turns into the power of working in the collection device 89.
Advantageously, the first filter plate 31 and the second filter plate 30 are provided with sewage filtering holes having a diameter larger than that of the filtering holes 35.
According to an embodiment, the lifting device 90 is described in detail below, the lifting device 90 includes a horizontally disposed cross bar 40 fixedly disposed in the drainage channel 22, a thread block 41 is fixedly disposed in the cross bar 40, a thread shaft 42 is installed in the thread block 41, a driving motor 34 is dynamically connected to an upper end of the thread shaft 42, and the driving motor 34 is fixedly disposed in the sewage cover 33.
According to an embodiment, the following detailed description is provided for the collecting device 89, where the collecting device 89 includes an annular rotating cavity 43 with an upward opening, the rotating cavity 43 is rotatably provided with an annular block 44, a power groove 65 is provided in the annular block 44, a power gear 67 is rotatably provided in the power groove 65 through a power rotating shaft 66, a power motor 68 fixedly provided on a lower end wall of the power groove 65 is dynamically connected to a lower end of the power gear 67, a lead screw 69 is threadedly connected to a left side of the power gear 67, an upper end of the lead screw 69 is fixedly connected to the collecting box 62, an annular rotating ring 50 is provided on an upper side of the collecting box 62, an absorbing cavity 51 is provided in the rotating ring 50, a connecting pipe 60 is provided between the absorbing cavity 51 and the collecting box 62, an air pump 52 is fixedly provided in the absorbing cavity 51, and a toothed ring 53 is fixedly provided on an inner.
According to an embodiment, a transmission device 88 is described in detail below, where the transmission device 88 includes an extrusion chute 75 with an upward opening, a rack 76 is slidably disposed in the extrusion chute 75, an extrusion spring 77 is fixedly disposed at a lower end of the rack 76, a transmission cavity 78 is communicatively disposed in a right end wall of the extrusion chute 75, a transmission gear 79 whose left side is engaged with the rack 76 is rotatably disposed in the transmission cavity 78, a first bevel gear 80 is fixedly disposed on a front end surface of the transmission gear 79, a second bevel gear 81 is engaged with a front side of the first bevel gear 80, a gear rotating shaft 82 is fixedly disposed at a center of the second bevel gear 81, a lower end of the gear rotating shaft 82 is fixedly connected with an input end of a transmission 84, a rotating shaft 87 is dynamically mounted at an output end of the transmission 84, a rotating gear 86 is fixedly disposed on the rotating shaft 87.
The steps of using a municipal road drainage apparatus herein will be described in detail with reference to fig. 1 to 4:
initially, the lower end of the sewage cover 33 abuts against the upper end surface of the body 21, the pressing spring 77 is in a compressed and power-storing state, the rotating ring 50 is located in the rotating chamber 43, and at this time, the toothed ring 53 is not engaged with the rotating gear 86.
During normal work, water on the road circulates into the drainage channel 22 through the filter holes 35 and then is drained through the drainage system, and solid waste in the sewage is filtered through the sewage cover 33 during drainage;
when the rainfall is large, the driving motor 34 is started, the threaded shaft 42 rotates, the threaded shaft 42 drives the sewage cover 33 to ascend under the action of the threaded block 41, then the first filter plate 31 and the second filter plate 30 are stretched, the sewage cover 33 can be used for warning pedestrians or vehicles that a drainage device is arranged at the position, the passing safety is improved, solid waste in the sewage is blocked by the first filter plate 31 and the second filter plate 30, and when the driving motor 34 rotates reversely, the sewage cover 33 descends, then the first filter plate 31 and the second filter plate 30 are folded to extrude and dewater the solid waste;
then, the power motor 68 is started to rotate the power gear 67, the lead screw 69 drives the collecting box 62 and the rotating ring 50 to ascend, the rotating ring 50 is located at the upper side position of the rotating chamber 43, at this time, the gear ring 53 is meshed with the rotating gear 86, when the sewage cover 33 ascends, the rack 76 ascends under the elastic action of the extrusion spring 77, the transmission gear 79, the first bevel gear 80 and the second bevel gear 81 rotate, the rotating shaft 87 output by the speed changer 84 is accelerated, the rotating gear 86 is accelerated to rotate, the rotating ring 50 is driven to rotate by the gear ring 53, the air pump 52 is started, and the solid garbage on the first filter plate 31 and the second filter plate 30 is absorbed into the absorbing chamber 51 and is collected by the collecting box 62 in a unified mode.
The invention has the beneficial effects that: the sewage on the municipal road is filtered through the sewage cover and discharged through the drainage system, when the rainfall or the drainage is increased, the sewage cover rises, the water flow is increased through the two filter plates, solid garbage in the sewage is filtered and squeezed for dehydration, and then the dehydrated garbage is automatically recovered through the collection device, so that the blockage of a drainage channel is avoided, and the sewage discharge adaptability and the drainage smoothness are improved.
In the above manner, a person skilled in the art can make various changes depending on the operation mode within the scope of the present invention.

Claims (1)

1. The utility model provides a town road drainage device, includes the organism, its characterized in that: a water drainage channel is arranged in the machine body;
the upper side of the drainage channel is communicated with the outside, the lower side of the drainage channel is communicated with a drainage system, the upper side of the drainage channel is provided with a sewage cover, the sewage cover is used for closing the drainage channel, the sewage cover is provided with uniform filtering holes which penetrate up and down, sewage is discharged into the drainage system downwards through the filtering holes and is output, an annular ring groove is arranged in the end surface of the lower side of the sewage cover, first filtering plates are uniformly hinged in the ring groove, the adjacent first filtering plates are connected, the lower ends of the first filtering plates are hinged with second filtering plates, the lower ends of the second filtering plates are hinged and arranged in the drainage channel, a lifting device is arranged on the lower side of the sewage cover, the lifting device controls the lifting of the sewage cover, after the sewage cover is lifted, the first filtering plates and the second filtering plates are straightened, and solid wastes in the sewage are filtered through the first filtering plates and the second filtering plates, the sewage is discharged through the drainage channel;
the periphery of the drainage channel is provided with a collecting device, the collecting device comprises an air pump and a collecting box, the solid wastes filtered by the first filter plate and the second filter plate are folded and pressurized by the first filter plate and the second filter plate, and then absorbed into the collecting box through the air pump for uniform collection, the right side of the drainage channel is provided with a transmission device, and the transmission device converts the lifting of the sewage cover into the power for working in the collecting device;
the first filter plate and the second filter plate are provided with sewage filtering holes with diameters larger than the filtering holes;
the lifting device comprises a horizontally placed cross rod fixedly arranged in the drainage channel;
a threaded block is fixedly arranged in the cross rod, a threaded shaft is arranged in the threaded block, the upper end of the threaded shaft is in power connection with a driving motor, and the driving motor is fixedly arranged in the sewage cover;
the collecting device comprises an annular rotating cavity with an upward opening;
an annular block is rotatably arranged in the rotating cavity, a power groove is formed in the annular block, a power gear is rotatably arranged in the power groove through a power rotating shaft, the lower end of the power gear is in power connection with a power motor fixedly arranged on the lower end wall of the power groove, the left side of the power gear is in threaded connection with a lead screw, the upper end of the lead screw is fixedly connected with the collecting box, an annular rotating ring is arranged on the upper side of the collecting box, an absorption cavity is formed in the rotating ring, a connecting pipe is communicated between the absorption cavity and the collecting box, an air pump is fixedly arranged in the absorption cavity, and a toothed ring is fixedly arranged on the inner;
the transmission device comprises an extrusion chute with an upward opening;
a rack is arranged in the extrusion chute in a sliding manner, an extrusion spring is fixedly arranged at the lower end of the rack, a transmission cavity is communicated with the inner wall of the right end of the extrusion chute, a transmission gear with the left side meshed with the rack is rotatably arranged in the transmission cavity, a first bevel gear is fixedly arranged on the front end surface of the transmission gear, a second bevel gear is meshed with the front side of the first bevel gear, a gear rotating shaft is fixedly arranged at the center of the second bevel gear, the lower end of the gear rotating shaft is fixedly connected with the input end of a speed changer, a rotating shaft is dynamically arranged at the output end of the speed changer, a rotating gear is fixedly arranged; when the sewage cover is lifted, the rack rises under the elastic action of the extrusion spring, then the transmission gear, the first bevel gear and the second bevel gear rotate, the rotating shaft rotating speed output by the transmission is accelerated, then the rotating gear rotates with higher speed, the rotating ring is driven to rotate through the toothed ring, the air pump is started, solid garbage on the first filter plate and the second filter plate is absorbed into the absorption cavity, and the solid garbage is uniformly collected through the collection box.
CN202010167229.XA 2020-03-11 2020-03-11 Town road drainage device Expired - Fee Related CN111206665B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010167229.XA CN111206665B (en) 2020-03-11 2020-03-11 Town road drainage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010167229.XA CN111206665B (en) 2020-03-11 2020-03-11 Town road drainage device

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Publication Number Publication Date
CN111206665A CN111206665A (en) 2020-05-29
CN111206665B true CN111206665B (en) 2020-11-10

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112227505A (en) * 2020-10-14 2021-01-15 秦霞 Automatic anti-blocking type environment-friendly sewage drainage floor drain
CN114182629B (en) * 2021-12-24 2024-01-09 辽宁省交通规划设计院有限责任公司 Anti-blocking drainage device for municipal road and bridge

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7311844B1 (en) * 2006-06-22 2007-12-25 Joyner Bobby L Method of treating stormwater runoff and domestic waste with coal ash
DE102009048609A1 (en) * 2009-10-08 2011-04-28 Nadler Straßentechnik GmbH Manhole cover for arrangement at or on manhole over closure element, has damping element arranged between frame and closure element such that forces are damped in cover, where separative element is arranged at outer side of cover
US8557109B1 (en) * 2012-09-13 2013-10-15 Mark Sutherland Drain cover for generally open flat drainage areas with debris blockage and open drainage portions
CN205742276U (en) * 2015-12-31 2016-11-30 陕西理工学院 A kind of flood control blockage resisting well lid
CN106351316A (en) * 2016-10-13 2017-01-25 无锡市诺智能科技有限公司 Detachable elevation type filter screen cover plate
CN206529799U (en) * 2017-01-13 2017-09-29 江苏信息职业技术学院 A kind of novel buoyant inspection shaft
CN206529802U (en) * 2017-02-10 2017-09-29 广西交通规划勘察设计研究院有限公司 A kind of self-suspending resets town road manhole lid device
CN207331764U (en) * 2017-07-18 2018-05-08 长兴明强精密铸件厂(普通合伙) New pattern manhole cover
CN207525785U (en) * 2017-11-26 2018-06-22 浙江唯胜园林建设有限公司 A kind of municipal inspection shaft well lid of automatic lifting
CN207633498U (en) * 2017-12-05 2018-07-20 江苏顺鸿建设工程有限公司 A kind of multi-functional town road manhole lid device
CN208201937U (en) * 2018-05-21 2018-12-07 湖北元邦建筑工程有限公司 A kind of anti-clogging well lid
CN110644601B (en) * 2019-10-11 2020-12-01 日照凯润城市建设管理集团有限公司 Emergency flood control drainage well lid

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SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20210430

Address after: 102200 423, 4 / F, block a, Xinhua future city building, 175 Litang Road, Changping District, Beijing

Patentee after: Li Qiannan

Address before: 311800 NO.311, lingshangban, Shangyu village, Datang street, Zhuji City, Shaoxing City, Zhejiang Province

Patentee before: Zhuji Xinfu water supply and drainage equipment Co.,Ltd.

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210520

Address after: NO.160, shangmadun Road, Wuxi City, Jiangsu Province, 214000

Patentee after: WUXI LANDSCAPE ENGINEERING Co.,Ltd.

Address before: 102200 423, 4 / F, block a, Xinhua future city building, 175 Litang Road, Changping District, Beijing

Patentee before: Li Qiannan

TR01 Transfer of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201110

CF01 Termination of patent right due to non-payment of annual fee