CN108678138A - A kind of urban duct dredger and the dredging method using the device - Google Patents
A kind of urban duct dredger and the dredging method using the device Download PDFInfo
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- CN108678138A CN108678138A CN201810654185.6A CN201810654185A CN108678138A CN 108678138 A CN108678138 A CN 108678138A CN 201810654185 A CN201810654185 A CN 201810654185A CN 108678138 A CN108678138 A CN 108678138A
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- mud
- dredging
- urban duct
- pipeline
- pan
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention relates to urban duct conservation technology fields, specifically disclose a kind of urban duct dredger and the dredging method using the device；Wherein, a kind of urban duct dredger, including mud pan and drive component are drawn, the drawing mud pan includes that disk body and broken mud bore；The driving component includes steel wire rope, Scroll, rotary joint and winding motor, the rotary joint includes the first rotor and the second rotor, first rotor includes affixed disk, transfer panel and drag-line, and the drag-line circumference at least even circumferential is provided with three；A kind of urban duct dredging method, including dilution mud, soil pick-up, cut dirt, mechanical dredging, again soil pick-up, gradually increased using the diameter of drawing mud pan.It is good, efficient that the present invention provides pipe-dredging effects, helps to reduce dredging difficulty and labor intensity, can ensure sewerage system normal operation, and a kind of urban duct dredger for accelerating harmonious city structure process and the dredging method using the device.
Description
Technical field
The present invention relates to urban duct conservation technology fields, specifically, it be related to a kind of urban duct dredger and
Using the dredging method of the device.
Background technology
With rapid urban, sewerage system is also increasingly perfect.Currently, in city, Urban Underground exists big
The drainage pipeline of amount, these underground pipings collectively form urban drainage pipe network.To ensure that sewerage system works normally for a long time,
There must be special messenger to carry out routine servicing to urban duct.
During urban duct routine servicing, line clogging is one of FAQs；For such issues that, it is conventional to dredge
Mode is to carry out manual cleaning using giant.But in daily life, the masonry on urban road, rubbish, soil etc.
Sundries often falls into urban duct through inspection shaft, and as these sundries are saved bit by bit more and more in pipeline, these sundries are dry
Strict blockage structure can be formed after drying up in pipeline, the dredging mode of conventional high-pressure hydraulic giant can not often dredge existing effect in fact
It is logical, the deuce to pay is caused to the routine servicing of urban duct, and seriously affect the normal work of sewerage system, influenced indirectly
People's daily life.
Invention content
The first technical purpose of the present invention is to provide a kind of urban duct dredger and the dredging method using the device,
Being driven using drive component draws mud pan to be moved back and forth along pipeline, greatly improves pipe-dredging effect, ensures sewerage system energy
Enough lasting normal works, ensure the convenience of people's daily life.
The present invention above-mentioned first technical purpose technical scheme is that：A kind of urban duct dredging
Device, including mud pan and the drive component for driving drawing mud pan to be moved back and forth along pipeline are drawn, the drawing mud pan includes disk body, institute
The both sides for stating disk body thickness direction integrally raise into type and have broken mud portion, and the broken mud portion is on the direction of perpendicular distal separation disc body
In contraction structure.
By using above-mentioned technical proposal, is driven using drive component and mud pan is drawn to be moved back and forth in pipeline, due to broken mud
Portion is in contraction structure, and after drawing mud pan to touch the tamper in pipeline by broken mud portion, broken mud portion can effectively break blocking
Object is allowed to be broken into several parts not of uniform size and gradually becomes loose structure；In this way, it can effectively solve the problem that
Obstinate tamper in pipeline improves urban duct and dredges effect, ensures that sewerage system can continue to work normally, ensures
The convenience of people's daily life.
The present invention is further arranged to：The broken mud portion bores for broken mud, and the broken mud is bored in frustum cone structure, and the broken mud
It bores side coiled coil and is provided with spiral thread.
By using above-mentioned technical proposal, after touching the tamper in pipeline, broken mud brill can effectively break opposite
Harder tamper forms the structure of relative loose if it is in stem portion not of uniform size to be allowed to decompose, and ensures pipe-dredging effect
Fruit.
The present invention is further arranged to：The driving component is respectively provided with one group in the both sides of drawing mud pan thickness direction；It is described
Drive component includes for connecting the steel wire rope for drawing the adjacent side of mud pan, and the steel wire rope is equipped with winding far from drawing mud pan one end
Axis, the wire rope roll are around on Scroll, and the Scroll has been fixedly and coaxially connected winding motor.
By using above-mentioned technical proposal, after winding motor startup, winding motor drives Scroll rotation, and passes through receipts
Spool and the steel wire rope being wound on Scroll pull mud pan, and then drive and mud pan is drawn to move linearly along pipeline；Drawing mud pan
During back and forth movement, the opening discharge for drawing mud pan that the tamper in pipeline can be pushed through pipe ends is realized pipeline and is dredged
Logical effect.
The present invention is further arranged to：The driving component further includes rotary joint, and the rotary joint includes in rotation
The first rotor and the second rotor being arranged, first rotor and the second rotor are solid with steel wire rope and drawing mud pan respectively
Fixed connection.
By using above-mentioned technical proposal, since the first rotor and the second rotor are arranged in rotation, therefore when broken mud bores
After touching tamper, under tamper reaction, it is equipped with spiral thread since broken mud bores outside, draws mud pan that can voluntarily turn
It is dynamic；At this point, broken mud bores the effect that can play similar " drilling " to tamper, to greatly speed up breaking for tamper, indirectly
Ensure pipe-dredging effect.
The present invention is further arranged to：First rotor includes affixed disk, transfer panel and drag-line, the affixed disk
It is fixedly connected with steel wire rope, the transfer panel and the second rotor are rotatablely connected；The drag-line both ends are respectively fixedly connected with affixed
Disk and transfer panel, and the drag-line at least even circumferential is provided with three.
By using above-mentioned technical proposal, affixed disk is fixedly connected with steel wire rope, and solid by more drag-lines and transfer panel
Fixed connection；Therefore, affixed disk can integrally play transfer panel and drawing mud pan by each drag-line the effect of Multi-point force application, Neng Gouti
Height draws the stability of mud pan, prevents that serious deflection occurs in pipeline, and then ensures the discharge for drawing mud pan to inner pipeline plug plug thing
Effect.
The present invention is further arranged to：The equal indent in both sides of the disk body thickness direction forms arc groove, and the disk
Body side evagination and structure in curved surface.
By using above-mentioned technical proposal, after tamper is embedded in arc groove, arc groove can reduce tamper again with
Draw the possibility of mud pan separation, it is ensured that draw mud pan can be quick and the tamper in effective discharge line, help to improve pipe
Efficiency is dredged in road；Meanwhile the survey of disk body axis is arranged to evagination and curved-surface structure, draw mud pan to be moved in pipeline flat can be improved
Stability reduces and draws mud pan that stuck possibility occurs in pipeline.
The second technical purpose of the present invention is to provide a kind of urban duct dredging method, and urban duct dredging effect is greatly improved
Fruit ensures sewerage system normal operation.
The present invention above-mentioned second technical purpose technical scheme is that：A kind of above-mentioned dredging of application
The urban duct dredging method of device, includes the following steps,
S1, precipitation and draining：Sewage in inspection shaft is discharged using slush pump, manifests the mud in shaft bottom；
S2, dilution mud：It is poured water into well room using high-pressure watercart, and stirs the sludge in inspection shaft and pipeline so that mud
Dilution；
S3, soil pick-up：The mud in inspection shaft is aspirated totally using suction-type sewer scavenger, and is diluting shaft bottom mud again with giant
Afterwards, a soil pick-up operation is at least repeated；
S4, dirt is cut：The water outlet at the water inlet pipe road junction of upstream inspection shaft and downstream inspection shaft is blocked, pipe to be unclogged is only left
The inlet and outlet in road；
S5, mechanical dredging：The dredger is installed, draws mud pan to be transported back and forth along pipeline to be unclogged by two groups of drive component drivings
It is dynamic, and the tamper being discharged in pipeline to be unclogged；
S6, again soil pick-up：High-pressure sewer flushing vehicle water band is stretched into upstream and checks bottom, water jet is to be unclogged along water (flow) direction alignment
Pipeline is sprayed water, and carries out soil pick-up again to well indoor silt in downstream inspection shaft；
S7, ventilation and dredging：Ventilation ventilation is carried out to well room inside using air blower, subsequent construction personnel goes into the well and to inspection shaft
Interior residue carries out manual cleaning, and mud is transported to sludge drying bed centralized processing.
By using above-mentioned technical proposal, after being diluted to the sludge in pipeline and inspection shaft, it is carried out successively
Soil pick-up, mechanical dredging and soil pick-up again can realize pipeline inside tamper fully dredging in conjunction with last manual cleaning operation,
Urban duct dredging effect is greatly improved, ensures sewerage system normal operation.
The present invention is further arranged to：During step S5 is carried out, gradually increases and use the drawing diameter of mud pan and right
Pipeline realizes multistage dredging.
It by using above-mentioned technical proposal, draws mud pan initially relatively small, contributes to the pulling force for reducing steel wire rope, prevent steel
Cord is pulled off；Meanwhile mud pan is gradual to be increased, it can be achieved that the multistage to pipeline is dredged, to further increase city with drawing
Pipe-dredging effect.
In conclusion the invention has the advantages that：
1, using the drawing mud pan bored with broken mud, coordinate the dredging mode of multiple cleaning, it can be to urban duct inside tamper
It realizes fully dredging, urban duct dredging effect is greatly improved, ensures sewerage system normal operation, ensures people day indirectly
The convenience often lived helps to build harmonious city；
2, it pulls mud pan along pipeline back and forth movement by winding motor, Scroll and steel wire rope and pipeline inside stubbornness is blocked
Object realizes fully dredging, can not only improve pipe-dredging effect, moreover it is possible to urban duct dredging difficulty is reduced, to greatly reduce
The labor intensity of construction personnel；
3, by drawing mud pan that arc groove is arranged, and the edge of mud pan will be drawn to be arranged to curved-surface structure, cooperation carries more drag-lines
Rotary joint, not only facilitate extension and draw mud pan service life, and pipe-dredging efficiency can be greatly improved.
Description of the drawings
Fig. 1 is that embodiment 1 is mainly used for embodying the construction schematic diagram for drawing mud pan occupation mode；
Fig. 2 is that embodiment 1 is mainly used for embodying the confined explosion's schematic diagram for drawing mud pan；
Fig. 3 is that embodiment 1 is mainly used for embodying the axonometric schematic diagram of the first rotor；
Fig. 4 is that embodiment 2 is mainly used for embodying the flow diagram of urban duct dredging method.
Reference numeral：1, pipeline；2, drive component；21, winding motor；211, Scroll；22, steel wire rope；23, rotation connects
Head；231, the first rotor；2311, affixed disk；2312, transfer panel；2313, drag-line；232, the second rotor；3, mud pan is drawn；
31, disk body；32, arc groove；33, broken mud bores；331, spiral thread.
Specific implementation mode
Below in conjunction with attached drawing, invention is further described in detail.
Embodiment 1：
Referring to attached drawing 1, a kind of urban duct dredger, including mud pan 3 is drawn, draw the whole rounded disk-like structure of mud pan 3；In reality
In the work progress of border, mud pan 3 is drawn to be vertically placed in pipeline 1 to be unclogged.Meanwhile the dredger further includes being drawn for driving
Drive component 2 of the mud pan 3 along 1 back and forth movement of pipeline to be unclogged.
In conjunction with attached drawing 2, it includes disk body 31 to draw mud pan 3,31 weeks lateral edges evaginations of disk body and in smooth surface structure；Pass through this
Kind mode, helps to improve the stationarity for drawing mud pan 3 to be moved in pipeline 1, and reduction drawing mud pan 3 occurs stuck in pipeline 1
Possibility.Disk body 31 is forming arc groove 32 close to its edge indent, the arc groove 32 in 31 thickness direction of disk body two
Side is symmetrical set；In the construction process, arc groove 32 can effectively prevent tamper to be detached from disk body 31, help to improve pipeline
1 dredging efficiency.Meanwhile drawing the both sides of 3 thickness direction of mud pan also integrally formed with broken mud portion；Broken mud portion is that broken mud bores 33, broken mud
It is in frustum cone structure to bore 33, and it is in contraction structure in the direction of perpendicular distal separation disc body 31；The axis that broken mud bores 33 surveys helical disk winding
It is equipped with spiral thread 331, therefore after broken mud bores 33 and touches tamper, under the action of tamper reaction force, draw mud pan 3 whole
Cognition voluntarily rotates, and to play the effect of similar " drilling " to tamper, helps speed up the disintegration of obstinate tamper.
Above-mentioned drive component 2 is drawing the both sides of 3 thickness direction of mud pan to be respectively provided with one group, and two groups of drive components 2 are respectively used to
The movement of mud pan 3 in the opposite direction is drawn in driving.Referring to attached drawing 1, by taking any group of drive component 2 as an example, drive component 2 includes receiving
Motor 21 is rolled up, the output shaft of winding motor 21 has been fixedly and coaxially connected Scroll 211 by shaft coupling, has been wound on Scroll 211
It is provided with steel wire rope 22, the one end of steel wire rope 22 far from Scroll 211 is connected with rotary joint 23, and rotary joint 23 deviates from steel wire
The side of rope 22 is fixedly connected with 3 adjacent side of mud pan is drawn by flange and bolt.
Referring to attached drawing 2-3, rotary joint 23 includes the first rotor 231 and the second rotor 232.Wherein, the first rotation
Body 231 includes affixed disk 2311 and transfer panel 2312, and affixed disk 2311 is adjacent with steel wire rope 22 away from the side of transfer panel 2312
One end banding fixed, and transfer panel 2312 is formed by axis pin and the second rotor 232 and is rotatablely connected；First rotor 231 is also
Including drag-line 2313, the both ends of drag-line 2313 are respectively fixedly connected with affixed disk 2311 and transfer panel 2312, and 2313 circumference of drag-line
It is evenly arranged with three.In this way, affixed disk 2311 to transfer panel 2312 and can draw mud pan 3 by each drag-line 2313
Entirety plays the effect of Multi-point force application, can improve the stability for drawing mud pan 3, prevents that serious deflection occurs in pipeline 1.
The operation principle of the present embodiment is：
After a wherein winding motor 21 starts, the winding motor 21 driving 211 synchronous revolving of corresponding Scroll, and pass through steel wire
Rope 22 and rotary joint 23 pull mud pan 3 to be moved to the side close to the winding motor 21 along pipeline 1；In the process, when
After drawing mud pan 3 to bore the hard tamper that 33 touch in pipeline 1 by broken mud, broken mud, which bores 33, can effectively break tamper, add
The disintegration of fast tamper；It is open with drawing mud pan 3 to move closer to pipeline 1, draws mud pan 3 that can push the tamper edge in pipeline 1
Pipeline 1 is moved and is finally open from pipeline 1 and is discharged.As two groups of drivings of drive component 2 draw mud pan 3 to be carried out in pipeline 1 back and forth
Movement, and gradually increase the diameter for using and drawing mud pan 3, fully dredging can be realized to 1 inside tamper of pipeline, be greatly improved
Pipeline 1 dredges effect.
Embodiment 2：
Referring to attached drawing 4, a kind of urban duct dredging method using above-mentioned dredger includes the following steps：
S1, precipitation and draining：Sewage in inspection shaft is discharged using slush pump, manifests the mud in shaft bottom.
In practice of construction, the case where for pipeline 1 adjacent two inspection shaft distance farther out, can be excavated among two inspection shafts
Go out new inspection shaft；For the larger inconvenient construction of inspection shaft buried depth, steel sheet pile supporting can be used, and inspection shaft is excavated to often
Row recovery again after the completion of dredging is waited in the position of the above 1m of water level.Further, since pipeline water level is generally higher, and mostly with sewage
Treatment plant's one phase collecting-tank connection, direct pump drainage cannot achieve the effect of precipitation, when carrying out step S1, should first use water pocket pair
It is blocked before and after pipeline 1 to be unclogged, closure will temporarily have in water pump pump drainage to downstream inspection shaft from the sewage of upstream later.
S2, dilution mud：It is poured water into well room using high-pressure watercart, and stirs the sludge in inspection shaft and pipeline 1 so that
Mud dilutes.
S3, soil pick-up：The mud in inspection shaft is aspirated totally using suction-type sewer scavenger, and shaft bottom is being diluted again with giant
After mud, a soil pick-up operation is at least repeated.
After pouring water, the tamper of part relative loose can be discharged tamper in pipeline 1 in step s3.
Also, when practice of construction, step S2 and S3 can be repeated more times, further increase pipe-dredging effect.
S4, dirt is cut：The water outlet at the water inlet pipe road junction of upstream inspection shaft and downstream inspection shaft is blocked, only leaves and waits dredging
The inlet and outlet threaded a pipe.
S5, mechanical dredging：Above-mentioned dredger is installed, draws mud pan 3 along pipe to be unclogged by two groups of drivings of drive component 2
1 back and forth movement of road, and the tamper being discharged in pipeline 1 to be unclogged.
In practice of construction, two groups of winding motors 21 for adhering to different driving component 2 separately alternately start；When any winding motor
After 21 start, which can drive 211 synchronous revolving of corresponding Scroll, and then pass through steel wire rope 22 and rotary joint 23
Driving draws mud pan 3 to be moved towards close to 21 side of winding motor along pipeline 1.As two groups of winding motors 21 alternately start,
Draw mud pan 3 will in pipeline 1 back and forth movement, and the tamper effectively in discharge line 1.
S6, again soil pick-up：High-pressure sewer flushing vehicle water band is stretched into upstream and checks bottom, water jet is waited for along water (flow) direction alignment
The pipeline 1 of dredging is sprayed water, and carries out soil pick-up again to well indoor silt in downstream inspection shaft.
By soil pick-up again, the remaining sludge after completing mechanical dredging of pipeline 1 can be further removed, pipe is further increased
Effect is dredged in road 1.
S7, ventilation and dredging：Ventilation ventilation is carried out to well room inside using air blower, subsequent construction personnel goes into the well and to inspection
The residue looked into well carries out manual cleaning, and mud is transported to sludge drying bed centralized processing.
Before construction personnel enters inspection shaft, the content of each ingredient of well indoor gas should be first measured；Pass through ventilation operation, energy
Enough ensure that oxygen content meets code requirement in well room, and pernicious gas is not exceeded；Also, also when construction personnel enters in well
It must wear safety belt, breathing mask and oxygen tank.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, people in the art
Member can as needed make the present embodiment the modification of not creative contribution after reading this specification, but as long as at this
It is all protected by Patent Law in the right of invention.
Claims (8)
1. a kind of urban duct dredger, including draw mud pan（3）And draw mud pan for driving（3）Along pipeline（1）It moves back and forth
Drive component（2）, which is characterized in that the drawing mud pan（3）Including disk body（31）, the disk body（31）The both sides of thickness direction
Integrally raising into type has broken mud portion, and the broken mud portion is in perpendicular distal separation disc body（31）Direction on be in contraction structure.
2. a kind of urban duct dredger according to claim 1, which is characterized in that bored for broken mud in the broken mud portion
（33）, the broken mud brill（33）In frustum cone structure, and the broken mud bores（33）Side coiled coil is provided with spiral thread
（331）.
3. a kind of urban duct dredger according to claim 1, which is characterized in that the driving component（2）It is drawing
Mud pan（3）The both sides of thickness direction are respectively provided with one group；The driving component（2）Mud pan is drawn including being used to connect（3）Adjacent side
Steel wire rope（22）, the steel wire rope（22）Far from drawing mud pan（3）One end is equipped with Scroll（211）, the steel wire rope（22）Volume
It is around in Scroll（211）On, and the Scroll（211）It has been fixedly and coaxially connected winding motor（21）.
4. a kind of urban duct dredger according to claim 3, which is characterized in that the driving component（2）Also wrap
Include rotary joint（23）, the rotary joint（23）It include the first rotor in rotation setting（231）With the second rotor
（232）, first rotor（231）With the second rotor（232）Respectively with steel wire rope（22）With drawing mud pan（3）It is fixed to connect
It connects.
5. a kind of urban duct dredger according to claim 4, which is characterized in that first rotor（231）
Including affixed disk（2311）, transfer panel（2312）And drag-line（2313）, the affixed disk（2311）With steel wire rope（22）It is fixed
Connection, the transfer panel（2312）With the second rotor（232）Rotation connection；The drag-line（2313）Both ends are respectively fixedly connected with
Affixed disk（2311）And transfer panel（2312）, and the drag-line（2313）At least even circumferential is provided with three.
6. a kind of urban duct dredger according to claim 1, which is characterized in that the disk body（31）Thickness direction
The equal indent in both sides form arc groove（32）, and the disk body（31）Side evagination and structure in curved surface.
7. a kind of urban duct dredging method of application dredger as described in any one of claim 1-6, which is characterized in that
Include the following steps,
S1, precipitation and draining：Sewage in inspection shaft is discharged using slush pump, manifests the mud in shaft bottom；
S2, dilution mud：It is poured water into well room using high-pressure watercart, and stirs the sludge in inspection shaft and pipeline so that mud
Dilution；
S3, soil pick-up：The mud in inspection shaft is aspirated totally using suction-type sewer scavenger, and is diluting shaft bottom mud again with giant
Afterwards, a soil pick-up operation is at least repeated；
S4, dirt is cut：The water outlet at the water inlet pipe road junction of upstream inspection shaft and downstream inspection shaft is blocked, pipe to be unclogged is only left
The inlet and outlet in road；
S5, mechanical dredging：The dredger is installed, draws mud pan to be transported back and forth along pipeline to be unclogged by two groups of drive component drivings
It is dynamic, and the tamper being discharged in pipeline to be unclogged；
S6, again soil pick-up：High-pressure sewer flushing vehicle water band is stretched into upstream and checks bottom, water jet is to be unclogged along water (flow) direction alignment
Pipeline is sprayed water, and carries out soil pick-up again to well indoor silt in downstream inspection shaft；
S7, ventilation and dredging：Ventilation ventilation is carried out to well room inside using air blower, subsequent construction personnel goes into the well and to inspection shaft
Interior residue carries out manual cleaning, and mud is transported to sludge drying bed centralized processing.
8. urban duct dredging method according to claim 7, which is characterized in that during step S5 is carried out, gradually
Increase and uses the diameter for drawing mud pan and multistage dredging is realized to pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654185.6A CN108678138B (en) | 2018-06-22 | 2018-06-22 | Urban pipeline dredging device and dredging method using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654185.6A CN108678138B (en) | 2018-06-22 | 2018-06-22 | Urban pipeline dredging device and dredging method using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678138A true CN108678138A (en) | 2018-10-19 |
| CN108678138B CN108678138B (en) | 2020-09-11 |
Family
ID=63811844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810654185.6A Active CN108678138B (en) | 2018-06-22 | 2018-06-22 | Urban pipeline dredging device and dredging method using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108678138B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110131522A (en) * | 2019-06-05 | 2019-08-16 | 云南明湖环境科技有限公司 | Sewage conduct walks robot and sewage conduit desilting system |
| CN117569440A (en) * | 2024-01-02 | 2024-02-20 | 北京住总集团有限责任公司 | Drainage pipeline cleaning device and cleaning method thereof |
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| CN107165260A (en) * | 2017-06-05 | 2017-09-15 | 天津海泰市政绿化有限公司 | A kind of mud clean method of rainfall pumping station |
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| KR20110045793A (en) * | 2009-10-27 | 2011-05-04 | (주) 선암기술연구소 | Device for dredge dredging soil managing sewer-pipe |
| CN102650145A (en) * | 2012-05-14 | 2012-08-29 | 中国十七冶集团有限公司 | Method for dredging drainage pipeline by winches |
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| CN117569440B (en) * | 2024-01-02 | 2024-06-07 | 北京住总集团有限责任公司 | Drainage pipeline cleaning device and cleaning method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108678138B (en) | 2020-09-11 |
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