CN108237127A - Steam circulation formula chemical industry equipment cleaning device - Google Patents
Steam circulation formula chemical industry equipment cleaning device Download PDFInfo
- Publication number
- CN108237127A CN108237127A CN201810059500.0A CN201810059500A CN108237127A CN 108237127 A CN108237127 A CN 108237127A CN 201810059500 A CN201810059500 A CN 201810059500A CN 108237127 A CN108237127 A CN 108237127A
- Authority
- CN
- China
- Prior art keywords
- water
- shaft
- water pipe
- roller
- sump
- 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
Links
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
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/045—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices being rotated while moved, e.g. flexible rotating shaft or "snake"
-
- 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
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/032—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces by the mechanical action of a moving fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2209/00—Details of machines or methods for cleaning hollow articles
- B08B2209/02—Details of apparatuses or methods for cleaning pipes or tubes
- B08B2209/027—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces
- B08B2209/04—Details of apparatuses or methods for cleaning pipes or tubes for cleaning the internal surfaces using cleaning devices introduced into and moved along the pipes
Abstract
The present invention relates to a kind of steam circulation formula chemical industry equipment cleaning devices, including pedestal, turbine, shaft, sump, column and cleaning unit, column and turbine are erected on pedestal, shaft is rotatably arranged on column and through column, one end of shaft is fixedly connected with the output shaft of turbine, and the other end is fixedly connected with cleaning unit；Turbine is equipped with high pressure steam inlet and low-pressure steam outlet, the water inlet connection of low-pressure steam outlet and sump, and the water outlet of sump can be connected to the nozzle of cleaning unit by water pipe；When in use, the high pressure steam inlet of turbine is connect cleaning device with high steam pipeline, and the water that high steam is liquefied as after entering turbine from high pressure steam inlet is flowed into from low-pressure steam outlet in sump.The power source of the cleaning device is the high steam generated in petroleum chemical enterprise's normal productive process, realizes recycling for high steam, and matching purge unit is cleaned, cleaning performance is preferable.
Description
Technical field
The present invention relates to technical field of petrochemical industry, more particularly to steam circulation formula chemical industry equipment cleaning device.
Background technology
In petroleum chemical enterprise, the dirts such as greasy filth, rust deposite curing in the equipment such as reaction kettle, pipeline of long-time service easily cause
Equipment caliber becomes smaller：Wherein silt deposit, which generates hydrogen sulfide gas, can cause environmental pollution, and easily cause blast accident；In waste water
The substances such as acid, alkali corrosion easily is generated to equipment wall surface；Foreign matter in pipeline, which is irregularly removed, can cause line clogging, therefore,
It needs to be purged equipment inner surface dirt using chemical method or physical method, reaches cleaning purpose.
Existing chemical industry equipment cleaning device is mostly simple in structure, and most of is to utilize electric motors function, explosion-proof performance
It is poor, while scrub single, cleaning performance is poor.
Invention content
The purpose of the present invention is to provide a kind of steam circulation formula chemical industry equipment cleaning device, the power sources of the cleaning device
It is the high steam generated in petroleum chemical enterprise's normal productive process, realizes recycling for high steam, and matching purge list
Member is cleaned, and cleaning performance is preferable.
To solve the above-mentioned problems, the present invention provides a kind of steam circulation formula chemical industry equipment cleaning device, including pedestal,
Turbine, shaft, sump, column and cleaning unit, the column and turbine are erected on the pedestal, and the shaft turns
Dynamic to be arranged on the column and through the column, one end of the shaft is fixedly connected with the output shaft of the turbine,
The other end is fixedly connected with the cleaning unit；The turbine is equipped with high pressure steam inlet and low-pressure steam outlet, described
Low-pressure steam outlet is connect with the water inlet of the sump, and the water outlet of the sump can be connected to the cleaning list by water pipe
The nozzle of member；When in use, the high pressure steam inlet of the turbine is connect the cleaning device with high steam pipeline, high pressure
Steam enters the water being liquefied as after the turbine from the high pressure steam inlet and is flowed into sump from the low-pressure steam outlet.
Preferably, the shaft is rotatablely connected by bearing and the column.
Preferably, the shaft is hollow tubular structure, perforation hole, the perforation hole are equipped in the lower part of the column
It is connected with the hollow portion of the shaft, the water pipe being connect with the water inlet of the sump is successively from the perforation hole, the shaft
Inside pass through.
Preferably, being additionally provided with compression pump in the shaft, the compression pump is arranged on the water pipe.
Preferably, the cleaning unit includes cleaning roller or/and water sprinkler, the cleaning roller/and water sprinkler pass through
Rotary connecting joint is removably connect with the shaft.
Preferably, the cleaning roller includes roll body, hairbrush, oil absorbent material, several nozzles and roller water pipe, the hair
Brush and oil absorbent material are alternately laid on the periphery of the roll body, and several nozzle pitch are arranged on the cylinder of the roll body
On wall and the nozzle is towards on the outside of the roll body；Several nozzles are connect with the roller water pipe；
The rotary connecting joint includes roller round end and shaft fixing end, and the shaft fixing end is fixed at described
One end of shaft simultaneously passes through screw thread and is connect with the water pipe thread on the sump water outlet, and the roller round end is rotatably arranged on
One end of the roll body simultaneously passes through screw thread and is connect with the roller water pipe thread, the roller round end and shaft fixing end
Between connected by core, the roller water pipe is connected with the water pipe by the core.
It is arranged on preferably, the water sprinkler includes watering cylinder, several nozzles and water sprinkler water pipe, several nozzles
On the barrel of the watering cylinder and towards the outside of the watering cylinder, several nozzles connect with the water sprinkler water pipe
It connects；
The rotary connecting joint includes water sprinkler round end and shaft fixing end, and the shaft fixing end is fixed at institute
It states one end of shaft and passes through screw thread and connect with the water pipe thread on the sump water outlet, the water sprinkler round end rotation is set
Put in one end of the watering cylinder and pass through screw thread and connect with the water sprinkler water pipe thread, the water sprinkler round end with turn
It is connected between axis fixing end by core, the water sprinkler water pipe is connected with the water pipe by the core.
Preferably, the periphery of the rotary connecting joint also sets up a protective cover, the protective cover is fixed at described turn
One end of axis.
Preferably, the sump is arranged in the pedestal, pressure relief opening is additionally provided on the sump.
Preferably, the lower part of the pedestal is equipped with several idler wheels.
Compared with prior art, there are following technique effects by the present invention：
1. the present invention is by the use of turbine as power-equipment, and high steam used is generated in the production process of chemical plant
, after turbine, it is liquid water to become low-pressure steam and then liquefy, and realizes recycling for steam, substantially increases
The utilization rate of steam meets the requirement instantly to environmental protection.
2. the present invention considerably increases the contact area with equipment wall surface, improves clear by the use of roller as cleaning device
Efficiency is washed, and has nozzle in roller, can be used in cleaning process with matching purge liquid, cleaning performance is more preferable.
3. there is rotary connecting joint, and pass through screw and consolidated on shaft of the present invention, cleaning roller, water sprinkler
It is fixed, it can realize that different radii cleaning roller, cleaning roller and water sprinkler are used alternatingly, be convenient to the cleaning to various equipment.
4. cleaning roller of the present invention is upper with longer harder bristle and oil absorbent material, it is ensured that cleaning roller
It is in close contact with equipment wall surface, makes cleaning performance more preferably.
5. base bottom of the present invention is equipped with idler wheel, entire pipe-line cleaner can be entered in pipeline by idler wheel, just
It is cleaned in long pipe road.
Description of the drawings
Fig. 1 is a kind of partial structural diagram of steam circulation formula chemical industry equipment cleaning device of the present invention；
Fig. 2 is the structural representation of a kind of steam circulation formula chemical industry equipment cleaning device that an alternate embodiment of the present invention provides
Figure；
Fig. 3 is the sectional view A-A of the present invention；
Fig. 4 is the structure diagram of water sprinkler that an alternate embodiment of the present invention provides.
Specific embodiment
A kind of steam circulation formula chemical industry equipment cleaning device provided by the invention is carried out below with reference to Fig. 1 to Fig. 4 detailed
Thin description is optional embodiment of the present invention, it is believed that those skilled in the art do not change spirit of the invention with it is interior
In the range of appearance, can it be modified and be polished.
It please refers to Fig.1, a kind of steam circulation formula chemical industry equipment cleaning device, including pedestal 1, turbine 2, shaft 3, sump
7th, column 8 and cleaning unit, the column 8 and turbine 2 are erected on the pedestal 1, and the shaft 3 is rotatably arranged on
On the column 8 and through the column 8, one end of the shaft 3 is fixedly connected with the output shaft of the turbine 2, another
End is fixedly connected with the cleaning unit；The turbine 2 is equipped with high pressure steam inlet 21 and low-pressure steam outlet 22, described
Low-pressure steam outlet 22 is connect with the water inlet of the sump 7, and the water outlet of the sump 7 can be connected to described by water pipe 6
The nozzle of cleaning unit；The cleaning device when in use, the high pressure steam inlet 21 of the turbine 2 and high steam pipeline
Connection, high steam enter the water being liquefied as after the turbine 2 from the high pressure steam inlet 21 and go out from the low-pressure steam
Mouth 22 is flowed into sump 7.The water that high steam is liquefied as after turbine 2 can be flowed into sump 7 and be stored, can be clear
It washes and is continuing in journey, the power of turbine 2, explosion-proof are all met the requirements.
Further, the shaft 3 is rotatablely connected by bearing 9 and the column 8, and shaft 3 is horizontally through column 8, i.e.,
One end of shaft 3 is on the left side of column 8, and the other end is on the right of column 8.
Further, the shaft 3 is hollow tubular structure, and perforation hole is equipped in the lower part of the column 8, described to wear
Pore is connected with the hollow portion of the shaft 3, and the water pipe 6 being connect with the water inlet of the sump 7 is successively from the perforation hole, institute
The inside for stating shaft 3 passes through.
- Fig. 4 is please referred to Fig.2, further, the cleaning unit includes cleaning roller 12 or/and water sprinkler 13, described
Cleaning roller 12/ and water sprinkler 13 are removably connect by rotary connecting joint with the shaft 3.In the technical program, clearly
Unit is washed there are three types of optional embodiment, first, cleaning unit is cleaning roller 12, cleaning roller 12 can by rotary connecting joint
Releasably it is connect with the shaft 3；Second is that cleaning unit be water sprinkler 13, water sprinkler 13 by rotary connecting joint removably with
The shaft 3 connects；Third, cleaning unit is cleaning roller 12 and water sprinkler 13, cleans roller 12 and water sprinkler 13 is interchangeable
It is connect with shaft 3, can 12 He of roller be cleaned according to the cleaning unit needed for specific pipe diameter size and the selection of other working environments
Water sprinkler 13 is removably connect by rotary connecting joint with shaft 3.Three kinds of embodiments of above-mentioned cleaning unit are applicable in
In the present invention, the optional any of which embodiment of the present invention, specifically which kind of embodiment, the present invention do not do specific
Limitation.
As a kind of embodiment, please refer to Fig.2 and Fig. 3, the cleaning roller 12 include roll body 124, hairbrush 125,
Oil absorbent material 121, several nozzles 122 and roller water pipe 123, the hairbrush 125 and oil absorbent material 121 are alternately laid on the roller
The periphery of ontology 124, in use, longer hairbrush 125 can ensure closely to connect with cleaned equipment with thicker oil absorbent material 121
It touches, while cylindrical cleaning roller 12 considerably increases the contact area with equipment wall surface.Several intervals of the nozzle 122 are set
It puts on the barrel of the roll body 124 and the nozzle 122 is towards 124 outside of roll body, can go out at any time
Water；Several nozzles 122 are connect with the roller water pipe 123；
The rotary connecting joint includes roller round end 126 and shaft fixing end 4, and the shaft fixing end 4 is fixedly installed
In one end of the shaft 3 and pass through screw thread and be threadedly coupled with the water pipe 6 on 7 water outlet of sump, the roller round end
126 are rotatably arranged on one end of the roll body 124 and pass through screw thread and are threadedly coupled with the roller water pipe 123, the rolling
It is connected between cylinder round end 126 and shaft fixing end 4 by core, the roller water pipe 123 passes through described turn with the water pipe 6
Core connects.In the present embodiment, the water pipe 6 on 7 water outlet of sump is fixed non-rotary, cleans the roller water in roller 12
Pipe 123 follows roll body 124 to rotate.In this embodiment, shaft fixing end 4 is fixed by screw, is avoided when in use
It relatively rotates, and can realize that different radii cleaning roller 12 is used alternatingly, more flexibly.
It as another embodiment, please refers to Fig.4, the water sprinkler 13 includes watering cylinder 133,131 and of several nozzles
Water sprinkler water pipe 134, several nozzles 131 are arranged on the barrel of the watering cylinder 133 and towards the watering cylinder
133 outside, several nozzles 131 are connect with the water sprinkler water pipe 134.When using the present embodiment, carrying out clearly
It before washing, can first sprinkle water, and suitably pressurization may also be and loosen dirt, makes cleaning performance more preferably, after cleaning, also may be used
To be sprinkled water with water sprinkler 13, remaining dirt and cleaning solution are cleaned totally.Further, water sprinkler 13 also has different half
Diameter it is spare, to adapt to the cleaning of distinct device, it is more convenient to use flexibly.
The rotary connecting joint includes water sprinkler round end 132 and shaft fixing end 4, and the fixation of shaft fixing end 4 is set
It puts in one end of the shaft 3 and passes through screw thread and be threadedly coupled with the water pipe 6 on 7 water outlet of sump, the water sprinkler rotation
Turn to hold 132 one end for being rotatably arranged on the watering cylinder 133 and pass through screw thread to be threadedly coupled with the water sprinkler water pipe 134,
It is connected between the water sprinkler round end 132 and shaft fixing end 4 by core, the water sprinkler water pipe 134 and the water pipe 6
It is connected by the core.In the present embodiment, the water pipe 6 on 7 water outlet of sump is fixed non-rotary, cylinder 133 of sprinkling water
And then watering cylinder 133 rotates interior water sprinkler water pipe 134.
Because the round end of rotary connecting joint is rotation, in order to protect rotary connecting joint, the rotary connecting joint
Periphery one protective cover 11 can be set, the protective cover 11 is fixed at one end of the shaft 3.
Water sprinkler 13 is smaller than cleaning 12 scale of construction of roller, and rotation is more flexible, is suitable for equipment, the container of different tube diameters
And the facility that other needs clean.
Further, compression pump 10 is additionally provided in the shaft 3, the compression pump 10 is arranged on the water pipe 6.
In cleaning process, can at any time control pressure pump 10 switch, so as to ensure clean roller 12 on nozzle 122 or/and watering
Nozzle 131 on device 13 is discharged at any time, ensures cleaning performance, and compression pump used 10 also meets the explosion-proof of chemical enterprise and wants
It asks.
In the present embodiment, the sump 7 is arranged in the pedestal 1, more convenient during use, while sump 7
There is external water inlet, water can be increased at any time and add in various cleaning solutions, and water outlet has pressure relief opening, ensure sump
Not superpressure in 7.Further, high pressure steam inlet 21 is arranged on the top of sump 7, and low-pressure steam outlet 22 is arranged on sump 7
Bottom.
In the present embodiment, the lower part of the pedestal 1 is equipped with several idler wheels 5, and entire tube cleaning arrangement can by idler wheel
Into in pipeline, convenient for being cleaned to long pipe road.
Disclosed above is only the specific embodiment of the application, but the application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (10)
1. a kind of steam circulation formula chemical industry equipment cleaning device, which is characterized in that including pedestal, turbine, shaft, sump, stand
Column and cleaning unit, the column and turbine are erected on the pedestal, and the shaft is rotatably arranged on the column
And through the column, one end of the shaft is fixedly connected with the output shaft of the turbine, and the other end and the cleaning are single
Member is fixedly connected；The turbine be equipped with high pressure steam inlet and low-pressure steam outlet, the low-pressure steam outlet with it is described
The water inlet connection of sump, the water outlet of the sump can be connected to the nozzle of the cleaning unit by water pipe；The cleaning
When in use, the high pressure steam inlet of the turbine is connect device with high steam pipeline, and high steam is steamed from the high pressure
Vapor inlet enters the water being liquefied as after the turbine and is flowed into sump from the low-pressure steam outlet.
2. steam circulation formula chemical industry equipment cleaning device as described in claim 1, which is characterized in that the shaft passes through bearing
It is rotatablely connected with the column.
3. steam circulation formula chemical industry equipment cleaning device as described in claim 1, which is characterized in that the shaft is hollow
Tubular structure is equipped with perforation hole in the lower part of the column, and the perforation hole is connected with the hollow portion of the shaft, with the water
The water pipe of the water inlet connection in storehouse passes through successively from the inside of the perforation hole, the shaft.
4. steam circulation formula chemical industry equipment cleaning device as claimed in claim 3, which is characterized in that be additionally provided in the shaft
Compression pump, the compression pump are arranged on the water pipe.
5. steam circulation formula chemical industry equipment cleaning device as described in claim 1, which is characterized in that the cleaning unit includes
Roller or/and water sprinkler are cleaned, the cleaning roller/and water sprinkler are removably connected by rotary connecting joint with the shaft
It connects.
6. steam circulation formula chemical industry equipment cleaning device as claimed in claim 5, which is characterized in that the cleaning roller includes
Roll body, hairbrush, oil absorbent material, several nozzles and roller water pipe, the hairbrush and oil absorbent material are alternately laid on the roller sheet
The periphery of body, several nozzle pitch are arranged on the barrel of the roll body and the nozzle is towards the roller sheet
External side；Several nozzles are connect with the roller water pipe；
The rotary connecting joint includes roller round end and shaft fixing end, and the shaft fixing end is fixed at the shaft
One end and pass through screw thread and connect with the water pipe thread on the sump water outlet, the roller round end is rotatably arranged on described
One end of roll body simultaneously passes through screw thread and is connect with the roller water pipe thread, between the roller round end and shaft fixing end
It is connected by core, the roller water pipe is connected with the water pipe by the core.
7. steam circulation formula chemical industry equipment cleaning device as claimed in claim 5, which is characterized in that the water sprinkler includes spilling
Water drum body, several nozzles and water sprinkler water pipe, several nozzles are arranged on the barrel of the watering cylinder and towards described
The outside of watering cylinder, several nozzles are connect with the water sprinkler water pipe；
The rotary connecting joint includes water sprinkler round end and shaft fixing end, and the shaft fixing end is fixed at described turn
One end of axis simultaneously passes through screw thread and is connect with the water pipe thread on the sump water outlet, and the water sprinkler round end is rotatably arranged on
One end of the watering cylinder simultaneously passes through screw thread and is connect with the water sprinkler water pipe thread, and the water sprinkler round end and shaft are consolidated
It is connected between fixed end by core, the water sprinkler water pipe is connected with the water pipe by the core.
8. steam circulation formula chemical industry equipment cleaning device as claimed in claim 5, which is characterized in that the rotary connecting joint
Periphery also sets up a protective cover, and the protective cover is fixed at one end of the shaft.
9. steam circulation formula chemical industry equipment cleaning device as described in claim 1, which is characterized in that the sump is arranged on institute
It states in pedestal, pressure relief opening is additionally provided on the sump.
10. steam circulation formula chemical industry equipment cleaning device as described in claim 1, which is characterized in that the lower part of the pedestal
Equipped with several idler wheels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810059500.0A CN108237127A (en) | 2018-01-22 | 2018-01-22 | Steam circulation formula chemical industry equipment cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810059500.0A CN108237127A (en) | 2018-01-22 | 2018-01-22 | Steam circulation formula chemical industry equipment cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108237127A true CN108237127A (en) | 2018-07-03 |
Family
ID=62699087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810059500.0A Pending CN108237127A (en) | 2018-01-22 | 2018-01-22 | Steam circulation formula chemical industry equipment cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108237127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695328A (en) * | 2021-10-27 | 2021-11-26 | 南通合众环保工程有限公司 | Dirt cleaning device for inner wall of sewage pipeline |
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| GB323162A (en) * | 1929-03-14 | 1929-12-24 | Barford & Perkins Ltd | Improvements in bottle washing machines |
| SU1039592A1 (en) * | 1982-03-24 | 1983-09-07 | Львовский Лесотехнический Институт | Apparatus for cleaning tube interior surfaces |
| CN2481146Y (en) * | 2001-04-28 | 2002-03-13 | 任荣泽 | Floating scraper sterilizer |
| KR20140086316A (en) * | 2012-12-28 | 2014-07-08 | 곽한무 | Movable cleaning apparatus that can move horizontally |
| CN204412718U (en) * | 2015-01-24 | 2015-06-24 | 李磊 | A kind of petroleum pipeline cleaning equipment |
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| CN206862154U (en) * | 2017-04-28 | 2018-01-09 | 程琛 | A kind of energy-saving condenser steam injection vacuum system |
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2018
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| GB323162A (en) * | 1929-03-14 | 1929-12-24 | Barford & Perkins Ltd | Improvements in bottle washing machines |
| SU1039592A1 (en) * | 1982-03-24 | 1983-09-07 | Львовский Лесотехнический Институт | Apparatus for cleaning tube interior surfaces |
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| CN206850715U (en) * | 2017-05-12 | 2018-01-05 | 兰州理工大学 | A kind of photovoltaic board cleaning device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113695328A (en) * | 2021-10-27 | 2021-11-26 | 南通合众环保工程有限公司 | Dirt cleaning device for inner wall of sewage pipeline |
| CN113695328B (en) * | 2021-10-27 | 2022-02-08 | 南通合众环保工程有限公司 | Dirt cleaning device for inner wall of sewage pipeline |
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Application publication date: 20180703 |