CN110385319A - A kind of dredging device for urban sewage pipeline - Google Patents
A kind of dredging device for urban sewage pipeline Download PDFInfo
- Publication number
- CN110385319A CN110385319A CN201910733767.8A CN201910733767A CN110385319A CN 110385319 A CN110385319 A CN 110385319A CN 201910733767 A CN201910733767 A CN 201910733767A CN 110385319 A CN110385319 A CN 110385319A
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- CN
- China
- Prior art keywords
- fixed
- urban sewage
- transmission shaft
- sewage pipeline
- dredging device
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
- B08B9/051—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Sewage (AREA)
Abstract
A kind of dredging device for urban sewage pipeline disclosed by the invention, including pedestal, bracket is fixed on the pedestal, the transmission shaft that left and right extends is rotatably connected on the bracket, there are two fixed-point apparatus for the transmission shaft array distribution, the present invention uses symmetrical articulated link chain rod structure, utilize the structure of the latched position of solenoid valve control, by fixing back and forth for hinged both ends, when one end is fixed, the other end can be pushed, the movement that frog formula is realized in a contracting is stretched by one, solve the problems, such as that equipment is mobile inconvenient in pipeline, the structure of rotating suspension knife and inclined conveyer belt is used simultaneously, ensure the clean degree of inner wall of the pipe, it is improved efficiency using mechanical operating mode, it solves the problems, such as that upper end tube wall can not be cleared up since cleaning person's height limits.
Description
Technical field
The present invention relates to pipe-dredging technical field, specially a kind of dredging device for urban sewage pipeline.
Background technique
Sewer is a kind of urban public utilities, refers to the pipeline of building draining-off sewage and rainwater.Not due to rubbish type
Together, some can be deposited in duct bottom, just will form blocking after of long duration, at rainy season, can make sewage backflow, while can also send out
Stench out, therefore the cleaning of sewer pipe is necessary work.
Using manually clearing up, fettler uses cutter by the rubbish on duct wall for traditional sewer pipe cleaning work
Removal, and sent out rubbish using garbage truck.Such operating mode low efficiency, and when encountering large-scale synthesis pipeline, clearly
The height that science and engineering can be confined to itself can not effectively clear up upper end wall surface, a kind of dress that can solve the above problem that the present invention illustrates
It sets.
Summary of the invention
Technical problem:
Traditional sewer pipe cleaning work is using manually clearing up, low efficiency, and when encountering large-scale pipeline, cleaning area has
Limit.
To solve the above problems, this example devises a kind of dredging device for urban sewage pipeline, a kind of use of this example
In being fixed with bracket on the dredging device of urban sewage pipeline, including pedestal, the pedestal, it is rotatably connected on the bracket
The transmission shaft that left and right extends, there are two fixed-point apparatus for the transmission shaft array distribution, and the fixed-point apparatus can be by being slidably connected
Fork arm on the pedestal, the contact using the fork arm with duct wall limit the fixed-point apparatus movement, the transmission shaft
It is equipped between the fixed-point apparatus and the reciprocating apparatus of the control fixed-point apparatus, the reciprocating apparatus can pass through setting
In the track bucket on the transmission shaft, the slideway being arranged on the bracket, be slidably connected on the slideway and with the rail
The driving lever that road bucket abuts drives the driving lever to move left and right using the annular wave channel of the track bucket, and the pedestal is equipped with
Support rod positioned at the fixed-point apparatus left end, the support rod are equipped with the cleaning plant of annular cutting, the cleaning plant
Ring can be realized by the driven shaft that is rotationally connected in the support rod left end face, the scraper being set on the driven shaft
Shape wall surface is cleared up, and the storage device for gathering promotion is rotatably connected on the driven shaft, and the storage device can pass through rotation and connect
The work box being connected on the driven shaft, it is centrosymmetric to be set to four diversion cavities in the work box and being open to the left,
It is set to groove of the diversion cavity in the inner wall of symmetrical centre side, rubbish is concentrated to push in the groove.
It may be preferred that end face is fixed with the vertical plate positioned at the fixed-point apparatus right end, the vertical plate on the upside of the pedestal
Left end face is fixed with the motor being connected by power with the transmission shaft.
It may be preferred that the Its lower side end face is rotatably connected to symmetrical idler wheel.
It may be preferred that height and position is interspersed between the fork arm of left and right two.
Wherein, the fixed-point apparatus includes the elevating lever being set on the upside of the fork arm, and the transmission shaft is equipped with hinged
, it is equipped with the through slot that left and right communicates in the hinged seat, hydraulic cylinder is fixed in the through slot, the hydraulic cylinder is interior equipped with oil
Sap cavity, the oil liquid chamber lower end inner wall are slidably connected with the elevating lever, connect between the elevating lever and the oil liquid cavity wall
It is connected to buffer spring, the oil liquid is intracavitary to slidably connect kelly, is connected with reset bullet between the kelly and the oil liquid chamber
Spring, the through slot is interior to be equipped with the annular groove that can be abutted with the kelly.
It may be preferred that interlinking between the oil liquid chamber of the left and right sides is connected to oil line pipe, and interior solenoid valve is installed.
Wherein, the reciprocating apparatus includes the sliding rail being set on the driving lever, and it is symmetrical that the sliding rail is equipped with front and back
Sliding slot slidably connects connecting rod in the sliding slot, compressed spring, the company is connected between the connecting rod and the sliding slot
It is hinged on extension bar and hinged seat articulated connection and symmetrical chain bar.
Wherein, the cleaning plant includes the master gear being set on the transmission shaft, and the driven shaft, which is equipped with, to be located at
The scraper right end and the pinion that connection is engaged with the master gear.
Wherein, the storage device includes the chamber that turns for being set to the groove left end, and the cavity wall that turns is equipped with center
Symmetrical four drive cavities, the driven shaft be equipped be located at it is described turn intracavitary turntable, slidably connected in the turntable
The symmetrical four centrifugation bars of the heart, are connected with centrifugation spring, the drive cavity right end inner wall between the centrifugation bar and the turntable
Be slidably connected the push rod being fixedly connected with the centrifugation bar, and drive cavity left end inner wall is slidably connected to abut with the push rod
Slide bar, be rotatably connected to the mobile belt wheel in the diversion cavity on the slide bar, be rotatably connected in the diversion cavity
Fixing axle, the fixing axle is equipped with fixed pulley, is connected with belt between the fixed pulley and the mobile belt wheel, described to lead
The intracavitary stripper plate for slidably connecting and abutting with belt is flowed, is connected with resistance spring between the stripper plate and the diversion cavity.
The beneficial effects of the present invention are: the present invention uses symmetrical articulated link chain rod structure, solenoid valve control is utilized
The structure of latched position, by fixing back and forth for hinged both ends, when one end is fixed, the other end can be pushed, and stretch one by one
The movement of frog formula is realized in contracting, solves the problems, such as that equipment is mobile inconvenient in pipeline, while conveying using rotating suspension knife and inclination
The structure of band is ensured the clean degree of inner wall of the pipe, is improved efficiency using mechanical operating mode, is solved due to cleaning person
The problem of height limitation can not clear up upper end tube wall.
Detailed description of the invention
The present invention is described in detail by following specific embodiments and drawings for ease of explanation,.
Fig. 1 is a kind of overall structure diagram of dredging device for urban sewage pipeline of the invention；
Fig. 2 is the structural schematic diagram in direction " A-A " of Fig. 1；
Fig. 3 is the structural schematic diagram in direction " B-B " of Fig. 1；
Fig. 4 is the structural schematic diagram in direction " C-C " of Fig. 1.
Specific embodiment
Below with reference to Fig. 1-Fig. 4, the present invention is described in detail, for sake of convenience, now provides to hereafter described orientation
As follows: hereafter described front-rear direction up and down is consistent with the front-rear direction up and down of Fig. 1 projection relation itself.
The present invention relates to a kind of dredging devices for urban sewage pipeline, are mainly used in urban sewage pipeline cleaning mistake
Cheng Zhong, below in conjunction with attached drawing of the present invention, the present invention will be further described:
A kind of dredging device for urban sewage pipeline of the present invention, including pedestal 13, fixation is set on the pedestal 13
There is bracket 17, the transmission shaft 55 that left and right extends is rotatably connected on the bracket 17, there are two 55 array distributions of transmission shaft
Fixed-point apparatus 901, the fixed-point apparatus 901 can utilize the fork arm by the fork arm 20 being slidably connected on the pedestal 13
20 contact with duct wall limits the movement of fixed-point apparatus 901, and the transmission shaft 55, which is equipped with, is located at the fixed-point apparatus 901
Between and the control fixed-point apparatus 901 reciprocating apparatus 902, the reciprocating apparatus 902 can be by being set to the transmission shaft
Track bucket 16 on 55, the slideway 15 being set on the bracket 17, be slidably connected on the slideway 15 and with the track
The driving lever 14 that bucket 16 abuts drives the driving lever 14 to move left and right, the pedestal using the annular wave channel of the track bucket 16
13 are equipped with the support rod 21 positioned at 901 left end of fixed-point apparatus, and the support rod 21 is equipped with the cleaning dress of annular cutting
903 are set, the cleaning plant 903 can be set to by the driven shaft 41 being rotationally connected in 21 left end face of support rod
Scraper 36 on the driven shaft 41 realizes ring wall surface cleaning, is rotatably connected to the receipts for gathering promotion on the driven shaft 41
Receive device 904, the storage device 904 can be centrosymmetric by the work box 38 that is rotationally connected on the driven shaft 41
Four diversion cavities 35 in the work box 38 and being open to the left are set to, are set to the diversion cavity 35 close to symmetrical centre side
Groove 27 in inner wall concentrates rubbish to push in the groove 27.
Valuably, the 13 upside end face of pedestal is fixed with the vertical plate 11 positioned at 901 right end of fixed-point apparatus, described
11 left end face of vertical plate is fixed with the motor 12 being connected by power with the transmission shaft 55, to provide equipment operation power.
Valuably, the 13 downside end face of pedestal is rotatably connected to symmetrical idler wheel 18, auxiliary movement.
Valuably, height and position is interspersed between the fork arm 20 of left and right two, and ensureing always has the institute of wherein side
Fork arm 20 is stated to abut with duct wall.
According to embodiment, fixed-point apparatus 901 is described in detail below, the fixed-point apparatus 901 includes being set to institute
The elevating lever 19 of 20 upside of fork arm is stated, the transmission shaft 55 is equipped with hinged seat 43, is equipped with left and right in the hinged seat 43 and communicates
Through slot 46, hydraulic cylinder 47 is fixed in the through slot 46, is equipped with oil liquid chamber 48, the oil liquid chamber 48 in the hydraulic cylinder 47
Lower end inner wall is slidably connected with the elevating lever 19, is connected with buffering elastic between the elevating lever 19 and 48 inner wall of oil liquid chamber
Spring 56 slidably connects kelly 50 in the oil liquid chamber 48, is connected with reset bullet between the kelly 50 and the oil liquid chamber 48
Spring 49, the through slot 46 is interior to be equipped with the annular groove 51 that can be abutted with the kelly 50.
Valuably, it interlinks between the oil liquid chamber 48 of the left and right sides and is connected to oil line pipe, and interior solenoid valve is installed.
According to embodiment, reciprocating apparatus 902 is described in detail below, the reciprocating apparatus 902 includes being set to institute
The sliding rail 45 on driving lever 14 is stated, the sliding rail 45 is equipped with the symmetrical sliding slot 54 in front and back, the company of slidably connecting in the sliding slot 54
Extension bar 53 is connected with compressed spring 52 between the connecting rod 53 and the sliding slot 54, be hinged in the connecting rod 53 and institute
The articulated connection of hinged seat 43 and symmetrical chain bar 44 are stated, folds the chain bar 44 using 14 position change of driving lever, it is real
The advance of existing equipment.
According to embodiment, cleaning plant 903 is described in detail below, the cleaning plant 903 includes being set to institute
The master gear 22 on transmission shaft 55 is stated, the driven shaft 41 is equipped with positioned at 36 right end of scraper and nibbles with the master gear 22
Close the pinion 42 of connection.
According to embodiment, storage device 904 is described in detail below, the storage device 904 includes being set to institute
That states 27 left end of groove turns chamber 24, and 24 inner wall of chamber that turns is equipped with centrosymmetric four drive cavities 37, the driven shaft 41
It is equipped with and is located at the turntable 25 turned in chamber 24, slidably connect centrosymmetric four centrifugation bars 23 in the turntable 25,
Centrifugation spring 26 is connected between the centrifugation bar 23 and the turntable 25, the 37 right end inner wall of drive cavity is slidably connected and institute
The push rod 40 that centrifugation bar 23 is fixedly connected is stated, the 37 left end inner wall of drive cavity slidably connects the cunning abutted with the push rod 40
Bar 39 is rotatably connected to the mobile belt wheel 32 in the diversion cavity 35, rotation in the diversion cavity 35 on the slide bar 39
It is connected with fixing axle 28, the fixing axle 28 is equipped with fixed pulley 29, between the fixed pulley 29 and the mobile belt wheel 32
It is connected with belt 30, the stripper plate 33 abutted with belt 30, the stripper plate 33 and institute are slidably connected in the diversion cavity 35
It states and is connected with resistance spring 34 between diversion cavity 35.
Below in conjunction with Fig. 1 to Fig. 4 to herein one of for urban sewage pipeline dredging device use step into
Row is described in detail:
When original state, 48 internal oil of oil liquid chamber on right side is saturation state, and the kelly 50 on right side is pushed to slide to right side
In annular groove 51 and the reset spring 49 on right side is made to put aside elastic potential energy, while the elevating lever 19 on right side being pushed to make the fork arm on right side
The buffer spring 56 that 20 downslides abut right side with tube wall puts aside elastic potential energy, limits 43 locomotivity of hinged seat on right side.
When cleaning, starter motor 12 rotates master gear 22 by transmission shaft 55, and master gear 22 passes through engagement rotation pinion
42, and then scraper 36 is rotated by driven shaft 41, the rubbish on duct wall is cleared up, meanwhile, driven shaft 41 rotates turntable 25 simultaneously
It pushes and is moved outside centrifugation bar 23 under the action of the centrifugal force, power passes sequentially through push rod 40 and slide bar 39 is pushed to be moved to the left, by mobile band
Wheel 32 is sent to 35 outside of diversion cavity, and tightens belt 30, and rubbish is transported to lower end from upper end and is concentrated；
In scale removal process, transmission shaft 55 drives the rotation of track bucket 16 that sliding rail 45 is pushed to move to left, at this point, 44 length of chain bar is constant
And be unfolded, push the hinged seat 43 in left side to move to left, device left is mobile, when sliding rail 45 is moved to 15 left end of slideway, open
Moving electromagnetic valve send the oil liquid in the oil liquid chamber 48 on right side to the oil liquid chamber 48 in left side, at this time the kelly 50 and elevating lever on right side
19 restore lower movement by the reset spring 49 on right side and the elasticity of buffer spring 56 respectively, and the hinged seat 43 for releasing right side is mobile
Limitation, while 48 inner fluid of the oil liquid chamber saturation in left side, limit the hinged seat 43 in left side, at this point, sliding rail 45 is in track bucket 16
It is moved to right under rotation, the hinged seat 43 on right side can be pulled by chain bar 44 and be moved to left at this time, and solenoid valve is again by the oil liquid chamber 48 in left side later
Interior oil liquid is sent to the oil liquid chamber 48 on right side, repeats the above-mentioned course of work, that realizes equipment moves to left movement.
The beneficial effects of the present invention are: the present invention uses symmetrical articulated link chain rod structure, solenoid valve control is utilized
The structure of latched position, by fixing back and forth for hinged both ends, when one end is fixed, the other end can be pushed, and stretch one by one
The movement of frog formula is realized in contracting, solves the problems, such as that equipment is mobile inconvenient in pipeline, while conveying using rotating suspension knife and inclination
The structure of band is ensured the clean degree of inner wall of the pipe, is improved efficiency using mechanical operating mode, is solved due to cleaning person
The problem of height limitation can not clear up upper end tube wall.
In the above manner, those skilled in the art can be made within the scope of the invention according to operating mode it is various
Change.
Claims (9)
1. a kind of dredging device for urban sewage pipeline, including pedestal；
It is fixed with bracket on the pedestal, the transmission shaft that left and right extends, the transmission shaft battle array are rotatably connected on the bracket
There are two fixed-point apparatus, the fixed-point apparatus to utilize the fork by the fork arm being slidably connected on the pedestal for column distribution
Contact of the bar with duct wall limits the fixed-point apparatus movement, and the transmission shaft is equipped between the fixed-point apparatus and controls
Make the reciprocating apparatus of the fixed-point apparatus；
The reciprocating apparatus can pass through the track bucket that is set on the transmission shaft, the slideway being arranged on the bracket, sliding
The driving lever for being connected on the slideway and abutting with the track bucket drives described dial using the annular wave channel of the track bucket
Bar moves left and right, and the pedestal is equipped with the support rod positioned at the fixed-point apparatus left end, and the support rod is cut equipped with annular
The cleaning plant cut；
The cleaning plant can be set to the driven shaft by the driven shaft being rotationally connected in the support rod left end face
On scraper, realize ring wall surface cleaning, the storage device for gathering promotion be rotatably connected on the driven shaft, the storage fills
Set can by the work box that is rotationally connected on the driven shaft, it is centrosymmetric be set in the work box and opening to the left
Four diversion cavities, be set to groove of the diversion cavity in the inner wall of symmetrical centre side, concentrate rubbish in the groove
It pushes.
2. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: on the upside of the pedestal
End face is fixed with the vertical plate positioned at the fixed-point apparatus right end, and the vertical plate left end face is fixed with dynamic with the transmission shaft
The motor of power connection.
3. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: the Its lower side
End face is rotatably connected to symmetrical idler wheel.
4. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: the institute of left and right two
Height and position between fork arm is stated to be interspersed.
5. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: the fixed-point apparatus
Including the elevating lever being set on the upside of the fork arm, the transmission shaft is equipped with hinged seat, is equipped with left and right phase in the hinged seat
Logical through slot is fixed with hydraulic cylinder in the through slot, is equipped with oil liquid chamber in the hydraulic cylinder, the oil liquid chamber lower end inner wall with
The elevating lever is slidably connected, and buffer spring is connected between the elevating lever and the oil liquid cavity wall, and the oil liquid is intracavitary
Slidably connect kelly, be connected with reset spring between the kelly and the oil liquid chamber, be equipped in the through slot can with it is described
The annular groove that kelly abuts.
6. a kind of dredging device for urban sewage pipeline as claimed in claim 5, it is characterised in that: the institute of the left and right sides
It states to interlink between oil liquid chamber and is connected to oil line pipe, and interior solenoid valve is installed.
7. a kind of dredging device for urban sewage pipeline as claimed in claim 5, it is characterised in that: the reciprocating apparatus
Including the sliding rail being set on the driving lever, the sliding rail is equipped with the symmetrical sliding slot in front and back, slidably connects in the sliding slot
Connecting rod is connected with compressed spring between the connecting rod and the sliding slot, be hinged in the connecting rod and the hinged seat
Articulated connection and symmetrical chain bar.
8. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: the cleaning plant
Including the master gear being set on the transmission shaft, the driven shaft be equipped with positioned at the scraper right end and with the master gear
Engage the pinion of connection.
9. a kind of dredging device for urban sewage pipeline as described in claim 1, it is characterised in that: the storage device
The chamber that turns including being set to the groove left end, the cavity wall that turns are described driven equipped with centrosymmetric four drive cavities
Axis be equipped be located at it is described turn intracavitary turntable, slidably connects centrosymmetric four centrifugation bars in the turntable, it is described from
Centrifugation spring is connected between core bar and the turntable, the drive cavity right end inner wall is slidably connected and the fixed company of the centrifugation bar
The push rod connect, drive cavity left end inner wall slidably connect the slide bar abutted with the push rod, are rotatablely connected on the slide bar
There is the mobile belt wheel being located in the diversion cavity, fixing axle is rotatably connected in the diversion cavity, the fixing axle, which is equipped with, fixes
Belt wheel is connected with belt, slidably connects in the diversion cavity and support with belt between the fixed pulley and the mobile belt wheel
The stripper plate connect is connected with resistance spring between the stripper plate and the diversion cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733767.8A CN110385319B (en) | 2019-08-09 | 2019-08-09 | A mediation equipment for urban sewer pipe |
| JP2019151638A JP6753013B1 (en) | 2019-08-09 | 2019-08-22 | Urban sewerage communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733767.8A CN110385319B (en) | 2019-08-09 | 2019-08-09 | A mediation equipment for urban sewer pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110385319A true CN110385319A (en) | 2019-10-29 |
| CN110385319B CN110385319B (en) | 2020-04-28 |
Family
ID=68288654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910733767.8A Expired - Fee Related CN110385319B (en) | 2019-08-09 | 2019-08-09 | A mediation equipment for urban sewer pipe |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6753013B1 (en) |
| CN (1) | CN110385319B (en) |
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| CN114482257A (en) * | 2022-01-18 | 2022-05-13 | 湖南高岭环保科技有限公司 | Urban sewage treatment device and treatment method thereof |
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| CN115520956B (en) * | 2022-10-31 | 2024-05-28 | 南京工业大学 | Denitrification device and denitrification method for urban domestic sewage |
| CN115717415B (en) * | 2022-11-29 | 2023-09-29 | 张家港宏昌钢板有限公司 | Floor drainage ditch cleaning device |
| CN117225764B (en) * | 2023-11-15 | 2024-01-23 | 山东广义电气科技有限公司 | Transformer dust removal device and use method thereof |
| CN117800049A (en) * | 2024-03-01 | 2024-04-02 | 晋城市丰昇源面业股份有限公司 | Conveyer belt self-cleaning device for steamed bread slice production |
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| CN108405506A (en) * | 2018-03-29 | 2018-08-17 | 黄艳秋 | A kind of cleaning machine for cleaning petroleum pipeline inner wall |
| CN109024863A (en) * | 2018-08-07 | 2018-12-18 | 刘佳峻 | Hydraulic engineering inner wall of the pipe automatic desilting mud device |
| CN110000171A (en) * | 2019-04-22 | 2019-07-12 | 徐承熙 | A kind of hydraulic engineering underground piping cleaning plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111236409A (en) * | 2020-03-04 | 2020-06-05 | 诸暨新伏给排水设备有限公司 | Urban sewer drainage device capable of preventing pipeline from being blocked and actively purifying |
| CN114482257A (en) * | 2022-01-18 | 2022-05-13 | 湖南高岭环保科技有限公司 | Urban sewage treatment device and treatment method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021028457A (en) | 2021-02-25 |
| JP6753013B1 (en) | 2020-09-09 |
| CN110385319B (en) | 2020-04-28 |
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