CN114392991A - Pipeline cleaning device for municipal works - Google Patents

Pipeline cleaning device for municipal works Download PDF

Info

Publication number
CN114392991A
CN114392991A CN202210002495.6A CN202210002495A CN114392991A CN 114392991 A CN114392991 A CN 114392991A CN 202210002495 A CN202210002495 A CN 202210002495A CN 114392991 A CN114392991 A CN 114392991A
Authority
CN
China
Prior art keywords
pipeline
pipe
drill bit
rod
cleaning
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.)
Pending
Application number
CN202210002495.6A
Other languages
Chinese (zh)
Inventor
陈明保
郭兆来
李�浩
李莹莹
杨玲
张海林
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.)
Anhui Hengming Construction Engineering Co ltd
Original Assignee
Anhui Hengming Construction Engineering 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 Anhui Hengming Construction Engineering Co ltd filed Critical Anhui Hengming Construction Engineering Co ltd
Priority to CN202210002495.6A priority Critical patent/CN114392991A/en
Publication of CN114392991A publication Critical patent/CN114392991A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/02Cleaning pipes or tubes or systems of pipes or tubes
    • B08B9/027Cleaning the internal surfaces; Removal of blockages
    • B08B9/04Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
    • B08B9/053Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
    • B08B9/055Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles

Abstract

The invention discloses a pipeline cleaning device for municipal engineering, which comprises a disc and a corner mechanism, the corner mechanism is composed of a connecting rod, a spherical block, a slide rod, a rotating groove, a sealing bin, a sealing bearing, an external connecting pipe, a guide pipe and a high-pressure spray head, the connecting rod is welded on the surface of the disc, and the surface of the connecting rod is welded with a spherical block, the surface of the spherical block is matched and rotatably connected with a sliding rod, the whole body adopts a rotary cleaning method, under the action of the elasticity of the scroll spring and the reset rod, the cleaning wheel can be firmly attached to the surface of the pipe wall to clean the pipe wall, and the secondary cleaning of the cleaned impurities is carried out through the scraper, particularly the cleaning of corners, the whole body has a good steering structure, can let whole better laminating pipeline route clear up, wholly can be applicable to pipeline clearance for municipal works on a large scale.

Description

Pipeline cleaning device for municipal works
Technical Field
The invention relates to the technical field of pipeline cleaning devices, in particular to a pipeline cleaning device for municipal engineering.
Background
The pipeline cleaning refers to cleaning the pipeline to restore the surface of the material in the pipeline. After cleaning, a layer of compact chemical passivation film is formed on the surface of clean metal, so that dirt can be effectively prevented from being generated again, equipment can be effectively protected, the equipment is not corroded or subjected to other chemical destruction, the safety of the equipment is effectively guaranteed, and the service life of the equipment is prolonged.
The existing cleaning method is generally cleaned by adopting a high-pressure water washing method, the high-pressure water spraying path is limited, the overall cleaning path is short, a large amount of resources can be consumed, and stubborn impurities attached to the pipe wall cannot be cleaned.
Disclosure of Invention
The invention aims to overcome the existing defects and provide a pipeline cleaning device for municipal engineering, which integrally adopts a rotary cleaning method, can enable a cleaning wheel to be firmly attached to the surface of a pipe wall to clean the pipe wall under the action of the elasticity of a volute spiral spring and a reset rod, and can secondarily clean impurities cleaned by a scraper, particularly has a good steering structure for cleaning corners, can better clean the path of the integrally attached pipeline, and can be widely applied to cleaning pipelines for municipal engineering.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a pipeline cleaning device for municipal works, includes the disc, still includes corner mechanism, corner mechanism specifically comprises connecting rod, spherical piece, slide bar, rotation groove, sealed storehouse, sealed bearing, external pipe, pipe and high pressure nozzle, disc skin weld has the connecting rod, and the connecting rod has two, connecting rod skin weld has the spherical piece, spherical piece surface fit rotates and is connected with the slide bar, slide bar surface fit sliding connection has the rotation groove, the welding of rotation groove surface opposite side has sealed storehouse, sealed storehouse surface mounting has sealed bearing, sealed bearing surface opposite side is installed and is taken over externally, the pipe is installed to the sealed storehouse inner wall, pipe surface one side fixedly connected with high pressure nozzle.
Preferably, still include clearance mechanism, clearance mechanism specifically comprises drill bit, spiral spring, contact piece, release link, clearance wheel, reset block, spring telescopic link and scraper blade.
Preferably, disc surface mounting has the reset block, spring telescopic link is installed to reset block surface one side, spring telescopic link surface mounting has the scraper blade, it has the drill bit to rotate groove surface one side welding, drill bit surface mounting has volute spiral spring, contact block is installed to volute spiral spring surface one side, contact block surface installs the reset lever in one side, reset lever surface one side cooperation is rotated and is connected with the clearance wheel.
Preferably, the production operation of the pipeline cleaning device for municipal engineering comprises the following steps:
and S1, connecting the external connecting pipe with an external high-pressure water pump, plugging the drill bit into the designated pipeline, and spraying high-pressure water into the device by the high-pressure water pump through the external connecting pipe.
S2, the water under high pressure passes through the pipe and transmits in to high pressure nozzle, high pressure nozzle sprays water to the external world, thereby drive whole device and rotate, when whole device moves forward, under volute spiral spring and reset block combined action, can let the clearance wheel laminate in the pipeline inner wall, the clearance has tentatively cleared up the pipeline inner wall under the rotation effect, let stubborn impurity break away from the pipeline surface, and under reset block and spring telescopic rod' S effect, can let the laminating of scraper blade firmly carry out the secondary clearance at the pipe wall surface to stubborn impurity.
S3, when a corner is met, the pipe wall of the drill bit can affect the movement of the drill bit, and the shape of the drill bit is changed under the combined action of the spherical block and the sliding rod, so that the drill bit is more suitable for the corner.
S4, the external personnel only need to hold the external connecting pipe to pull back and forth, and the whole operation can be realized.
The invention has the following beneficial effects:
when in use, the external pipe is connected with an external high-pressure water pump, the drill bit is plugged into a designated pipeline, the high-pressure water pump sprays high-pressure water into the device through the external pipe, the integral connection is convenient, and the operation can be realized by one person, the high-pressure water is transmitted into the high-pressure nozzle through the pipe, the high-pressure nozzle sprays water to the outside, so that the whole device is driven to rotate, when the whole device moves forwards, the cleaning wheels can be attached to the inner wall of the pipeline under the combined action of the volute spiral spring and the reset block, the inner wall of the pipeline is cleaned preliminarily under the rotation action, stubborn impurities are separated from the surface of the pipeline, under the action of the reset block and the telescopic rod of the spring, the scraper can be firmly attached to the surface of the pipeline wall to clean the stubborn impurities for the second time, in the design, the high-pressure nozzle is integrally clockwise oriented, the acting force generated by the water spraying is the same, and the whole device can be driven to rotate at high speed under the action of the sealing bearing, under the action of rotation, the drill bit can more easily break through impurities in the pipeline to clean the pipeline, when meeting a pipeline interface, the inner diameter of the pipeline can be reduced, under the action of the elasticity of the scroll spring and the reset rod, the cleaning wheel can still be attached to the surface of the scroll spring and cleaned, because the slide bar can rotate in the rotating groove, the spherical block can also rotate on the surface of the slide bar, thus, through the combination of the two types, the drill bit and the disc can rotate by more angles, so that the drill bit and the disc can better perform corner movement in a corner and clean the corner, and the external operator can operate the whole device by pulling the external pipe back and forth, the whole device can carry out internal cleaning for the pipeline with longer route, and adopt the method of the dual clearance of laminating formula, let the clearance cleaner, wholly can be applicable to municipal pipeline clearance on a large scale.
Drawings
FIG. 1 is a schematic view of the overall structure of a municipal pipeline cleaning device according to the present invention;
FIG. 2 is a schematic view of the inner wall structure of a drill bit of the pipeline cleaning device for municipal engineering according to the present invention;
FIG. 3 is a schematic view of the surface structure of a disc of the pipeline cleaning device for municipal engineering according to the present invention
FIG. 4 is a schematic view of the inner wall structure of the sealed cabin of the pipeline cleaning device for municipal engineering.
In the figure: 1. a disc; 2. a corner turning mechanism; 201. a connecting rod; 202. a spherical block; 203. a slide bar; 204. a rotating groove; 205. sealing the bin; 206. sealing the bearing; 207. an external connection pipe; 208. a conduit; 209. a high pressure spray head; 3. a cleaning mechanism; 301. a drill bit; 302. a volute spiral spring; 303. a contact block; 304. a reset lever; 305. cleaning the wheel; 306. a reset block; 307. a spring telescopic rod; 308. a scraper.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, 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.
Example 1
The utility model provides a pipeline cleaning device for municipal works, includes disc 1, still includes corner mechanism 2, corner mechanism 2 specifically comprises connecting rod 201, spherical piece 202, slide bar 203, rotation groove 204, sealed bin 205, sealed bearing 206, external pipe 207, pipe 208 and high pressure nozzle 209, disc 1 skin weld has connecting rod 201, and connecting rod 201 has two, connecting rod 201 skin weld has spherical piece 202, spherical piece 202 surface fit rotates and is connected with slide bar 203, slide bar 203 surface fit sliding connection has rotation groove 204, the welding of rotation groove 204 surface opposite side has sealed bin 205, sealed bin 205 surface mounting has sealed bearing 206, sealed bearing 206 surface opposite side installs external pipe 207, sealed bin 205 inner wall installs pipe 208, pipe 208 surface one side fixedly connected with high pressure nozzle 209.
Preferably, the cleaning device further comprises a cleaning mechanism 3, and the cleaning mechanism 3 specifically comprises a drill bit 301, a scroll spring 302, a contact block 303, a reset rod 304, a cleaning wheel 305, a reset block 306, a spring telescopic rod 307 and a scraper 308.
Preferably, disc 1 surface mounting has reset block 306, reset block 306 surface one side installs spring telescopic link 307, spring telescopic link 307 surface mounting has scraper blade 308, it has drill bit 301 to rotate groove 204 surface one side welding, drill bit 301 surface mounting has volute spiral spring 302, volute spiral spring 302 surface one side installs contact block 303, contact block 303 surface one side installs release link 304, release link 304 surface one side cooperation is rotated and is connected with clearance wheel 305.
Preferably, the production operation of the pipeline cleaning device for municipal engineering comprises the following steps:
s1, connecting the external connecting pipe 207 with an external high-pressure water pump, plugging the drill bit 301 into a specified pipeline, and spraying high-pressure water into the device through the external connecting pipe 207 by the high-pressure water pump.
S2, the water under high pressure passes through pipe 208 and transmits in to high pressure nozzle 209, high pressure nozzle 209 sprays water to the external world, thereby drive whole device and rotate, when whole device moves forward, under volute spiral spring 302 and reset block 306 combined action, can let clearance wheel 305 laminate in the pipeline inner wall, the preliminary clearance is carried out to the pipeline inner wall to clearance under the rotation, let stubborn impurity break away from the pipeline surface, and under reset block 306 and spring telescopic rod 307' S effect, can let scraper blade 308 laminating firmly carry out the secondary clearance at the pipe wall surface to stubborn impurity.
S3, when a corner is met, the pipe wall of the drill bit can affect the movement of the drill bit 301, and the shape of the drill bit is changed under the combined action of the spherical block 202 and the sliding rod 203, so that the drill bit can be more suitable for the corner.
S4, the external personnel only need to hold the external connecting pipe 207 to pull back and forth, and the whole operation can be realized.
In summary, the following steps: the pipeline cleaning device for municipal engineering provided by the invention has the advantages that when in use, the external connecting pipe 207 is connected with an external high-pressure water pump, the drill bit 301 is plugged into a designated pipeline, the high-pressure water pump sprays high-pressure water into the device through the external connecting pipe 207, the whole connection is convenient, the operation can be realized by one person, the high-pressure water is transmitted into the high-pressure spray head 209 through the guide pipe 208, the high-pressure spray head 209 sprays water to the outside, so as to drive the whole device to rotate, when the whole device moves forwards, the cleaning wheel 305 is attached to the inner wall of the pipeline under the combined action of the scroll spring 302 and the reset block 306, the inner wall of the pipeline is cleaned under the rotating action, stubborn impurities are separated from the surface of the pipeline, the scraper 308 is firmly attached to the surface of the pipeline wall to perform secondary cleaning on the stubborn impurities under the action of the reset block 306 and the spring telescopic rod 307, and when in design, the high-pressure spray head 209 is oriented clockwise, so that the acting force generated by water spraying is the same, the whole device is driven to rotate at high speed under the action of the sealing bearing 206, the drill bit 301 breaks impurities in the pipeline more easily to clean the pipeline under the action of rotation, when a pipeline interface is met, the inner diameter of the pipeline is reduced, the cleaning wheel 305 is still attached to the surface of the pipeline to clean the pipeline under the action of the elastic force of the scroll spring 302 and the reset rod 304, the spherical block 202 can also rotate on the surface of the slide rod 203 because the slide rod 203 can rotate in the rotating groove 204, the drill bit 301 and the disc 1 can rotate at more angles through various combinations of the two, so that the rotation angle movement in the rotation angle can be better performed and the cleaning can be performed, and an external operator only needs to pull the external pipe 207 back and forth to operate the whole device, wholly can carry out inside clearance to the pipeline of longer route to adopt the method of the double clearance of laminating formula, let the clearance cleaner, wholly can be applicable to municipal pipeline clearance on a large scale.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (4)

1. The utility model provides a pipeline cleaning device for municipal works, includes disc (1), its characterized in that: the device is characterized by further comprising a corner mechanism (2), wherein the corner mechanism (2) is specifically composed of a connecting rod (201), a spherical block (202), a sliding rod (203), a rotating groove (204), two sealing bins (205), a sealing bearing (206), an outer connecting pipe (207), a guide pipe (208) and a high-pressure sprayer (209), the connecting rod (201) is welded on the surface of the disc (1), the spherical block (202) is welded on the surface of the connecting rod (201), the sliding rod (203) is connected on the surface of the spherical block (202) in a matched and rotating mode, the rotating groove (204) is connected on the surface of the sliding rod (203) in a matched and sliding mode, the sealing bin (205) is welded on the other side of the surface of the rotating groove (204), the sealing bearing (206) is installed on the surface of the sealing bin (205), the outer connecting pipe (207) is installed on the other side of the surface of the sealing bearing (206), the guide pipe (208) is installed on the inner wall of the sealing bin (205), one side of the surface of the guide pipe (208) is fixedly connected with a high-pressure spray head (209).
2. The municipal engineering pipeline cleaning device according to claim 1, wherein: the cleaning device is characterized by further comprising a cleaning mechanism (3), wherein the cleaning mechanism (3) is composed of a drill bit (301), a volute spiral spring (302), a contact block (303), a reset rod (304), a cleaning wheel (305), a reset block (306), a spring telescopic rod (307) and a scraper (308).
3. The municipal pipeline cleaning device according to claim 2, wherein: disc (1) surface mounting has reset block (306), spring telescopic link (307) are installed to reset block (306) surface one side, spring telescopic link (307) surface mounting has scraper blade (308), it has drill bit (301) to rotate groove (204) surface one side welding, drill bit (301) surface mounting has scroll spring (302), contact piece (303) is installed to scroll spring (302) surface one side, contact piece (303) surface one side installs release link (304), release link (304) surface one side cooperation is rotated and is connected with clearance wheel (305).
4. The municipal pipeline cleaning device according to claim 3, wherein: the production operation of the pipeline cleaning device for municipal engineering comprises the following steps:
s1, the external connecting pipe (207) is connected with an external high-pressure water pump, the drill bit (301) is plugged into the designated pipeline, and the high-pressure water pump sprays high-pressure water into the device through the external connecting pipe (207).
S2, the water under high pressure passes through pipe (208) and transmits in to high pressure nozzle (209), high pressure nozzle (209) outwards spray water, thereby drive whole device and rotate, when whole device forward movement, under volute spiral spring (302) and reset block (306) combined action, can let clearance wheel (305) laminate in the pipeline inner wall, cleared up under the rotation and carried out preliminary clearance to the pipeline inner wall, let stubborn impurity break away from the pipeline surface, and under the effect of reset block (306) and spring telescopic link (307), can let laminating that scraper blade (308) are firm carry out the secondary in the pipe wall surface and clear up stubborn impurity.
S3, when a corner is met, the pipe wall of the drill bit can affect the movement of the drill bit (301), and the shape of the drill bit is changed under the combined action of the spherical block (202) and the sliding rod (203), so that the drill bit can be more suitable for the corner.
S4, the whole operation can be realized only by pulling the external pipe (207) back and forth by external personnel by holding.
CN202210002495.6A 2022-01-04 2022-01-04 Pipeline cleaning device for municipal works Pending CN114392991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210002495.6A CN114392991A (en) 2022-01-04 2022-01-04 Pipeline cleaning device for municipal works

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210002495.6A CN114392991A (en) 2022-01-04 2022-01-04 Pipeline cleaning device for municipal works

Publications (1)

Publication Number Publication Date
CN114392991A true CN114392991A (en) 2022-04-26

Family

ID=81229397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210002495.6A Pending CN114392991A (en) 2022-01-04 2022-01-04 Pipeline cleaning device for municipal works

Country Status (1)

Country Link
CN (1) CN114392991A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117244885A (en) * 2023-11-20 2023-12-19 青岛安润环保科技有限公司 Energy-saving emission-reducing electrochemical descaling corrosion-proof equipment for circulating water system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553602B1 (en) * 1997-09-13 2003-04-29 Slovensky Plynarensky Priemysel, S.P. Device for pipeline interior cleaning
CN106862198A (en) * 2017-03-29 2017-06-20 成都理工大学 A kind of bionical cleaning device of Alternative manifold type pipe inwall and its clean method
CN107377541A (en) * 2017-07-03 2017-11-24 中国铁道科学研究院铁道建筑研究所 A kind of drain cleaner
CN107695053A (en) * 2017-10-27 2018-02-16 长江大学 A kind of oil pipeline pipe cleaning device
CN109162302A (en) * 2018-07-20 2019-01-08 中国二十冶集团有限公司 The dredging sound detecting pipe method replaced using mud
CN111069200A (en) * 2019-12-09 2020-04-28 西安工业大学 Pipeline inner wall cleaning robot
CN111468487A (en) * 2020-05-08 2020-07-31 杭州唛唐智能科技有限公司 Cleaning equipment for inside of pipeline
CN211965247U (en) * 2020-03-17 2020-11-20 曹芳 Novel municipal administration water supply and drainage pipeline clearance device
CN212469133U (en) * 2020-03-03 2021-02-05 长安大学 Pipeline cleaning device
CN213645238U (en) * 2021-04-29 2021-07-09 辽宁亿赛普节能技术有限公司 Pipeline blockage clearing device convenient for evaporative crystallizer

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553602B1 (en) * 1997-09-13 2003-04-29 Slovensky Plynarensky Priemysel, S.P. Device for pipeline interior cleaning
CN106862198A (en) * 2017-03-29 2017-06-20 成都理工大学 A kind of bionical cleaning device of Alternative manifold type pipe inwall and its clean method
CN107377541A (en) * 2017-07-03 2017-11-24 中国铁道科学研究院铁道建筑研究所 A kind of drain cleaner
CN107695053A (en) * 2017-10-27 2018-02-16 长江大学 A kind of oil pipeline pipe cleaning device
CN109162302A (en) * 2018-07-20 2019-01-08 中国二十冶集团有限公司 The dredging sound detecting pipe method replaced using mud
CN111069200A (en) * 2019-12-09 2020-04-28 西安工业大学 Pipeline inner wall cleaning robot
CN212469133U (en) * 2020-03-03 2021-02-05 长安大学 Pipeline cleaning device
CN211965247U (en) * 2020-03-17 2020-11-20 曹芳 Novel municipal administration water supply and drainage pipeline clearance device
CN111468487A (en) * 2020-05-08 2020-07-31 杭州唛唐智能科技有限公司 Cleaning equipment for inside of pipeline
CN213645238U (en) * 2021-04-29 2021-07-09 辽宁亿赛普节能技术有限公司 Pipeline blockage clearing device convenient for evaporative crystallizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117244885A (en) * 2023-11-20 2023-12-19 青岛安润环保科技有限公司 Energy-saving emission-reducing electrochemical descaling corrosion-proof equipment for circulating water system
CN117244885B (en) * 2023-11-20 2024-02-02 青岛安润环保科技有限公司 Energy-saving emission-reducing electrochemical descaling corrosion-proof equipment for circulating water system

Similar Documents

Publication Publication Date Title
CN101402078B (en) Complete equipment and process for derusting of ultra-high pressure water fluid jet wall-climb
CN114392991A (en) Pipeline cleaning device for municipal works
CN108655135A (en) Ship, petrochemical industry storage tank wall surface climb wall rust removing robot work system
CN210730436U (en) Municipal administration water supply and drainage pipeline exempts from to excavate inner wall belt cleaning device
CN208828065U (en) Ship derusting cleaning system based on climbing robot
CN213768498U (en) High-pressure water washing device for vehicle
CN108945340A (en) Ship derusting cleaning method based on climbing robot
CN111974761A (en) Device for flushing inner wall and outer wall of steel pipe in close range after pickling
CN207244542U (en) A kind of Smartway road surface spraying machine
CN213530039U (en) Spiral propelling pipe cleaner for natural gas pipeline
CN113976557A (en) Robot for dredging oil pipeline with directional dredging structure
CN217070005U (en) Self-propelled pipeline internal cleaning device
CN108160586A (en) A kind of mechanical gear cleaning device
CN112916533B (en) Pipeline inner wall scale removal device
CN212824180U (en) High-efficient belt cleaning device of digit control machine tool
CN212285166U (en) Device for flushing inner wall and outer wall of steel pipe in close range after pickling
CN86206312U (en) Rotary spraying head with two nozzles
CN210708933U (en) Horizontal oil tank convenient to wash
CN113477638A (en) Pipeline scale cleaning sledge
CN208944404U (en) A kind of coating tool being convenient to clean
CN218364116U (en) High-pressure water rust removal device for ship rust removal
CN209958279U (en) Pavement cleaning trolley
CN217665198U (en) Oil field oil production pipeline cleaning equipment
CN218655934U (en) Visual small-size long-range cleaning equipment
CN217105482U (en) Drainage pipe sludge treatment device for municipal works

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20220426