CN107989593A - A kind of sandstone filtration apparatus of oil - Google Patents
A kind of sandstone filtration apparatus of oil Download PDFInfo
- Publication number
- CN107989593A CN107989593A CN201711302943.XA CN201711302943A CN107989593A CN 107989593 A CN107989593 A CN 107989593A CN 201711302943 A CN201711302943 A CN 201711302943A CN 107989593 A CN107989593 A CN 107989593A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- oil
- babinet
- filtration apparatus
- dual
- 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
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- 238000001914 filtration Methods 0.000 title claims abstract description 29
- 239000003208 petroleum Substances 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 75
- 230000003068 static effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000035 biogenic effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a kind of sandstone filtration apparatus of oil, including babinet, the upper surface of babinet is fixedly connected with the lower surface of baffle, the left surface of baffle is fixedly connected with the right end of fixed column, the left end of fixed column is fixedly connected with the fuselage of dual-axle motor, and the output shaft of the front and back of dual-axle motor has been fixedly connected with turntable, and the front of turntable is fixedly connected with the one end at the shaft back side, the outer surface of shaft is socketed with bearing, and the outer surface of bearing is fixedly connected with the top of traction rope.The filtration apparatus of the processing oil waste residue, pass through the cooperation between control panel, oil pump, petroleum pipeline, dual-axle motor, turntable, bearing, shaft, traction rope, ash can, filter screen, sliding slot, sliding block, telescopic rod and spring, reduce cost of labor and the amount of labour of people, avoid the skin or clothing for causing oil to make people dirty because of artificial filter, the work efficiency of people is improved, is brought convenience for people in the work of filtering oil.
Description
Technical field
The present invention relates to the sandstone filtration apparatus of oil filtration art, specially a kind of oil.
Background technology
One of oil, the main object of geological prospecting, is a kind of sticky, dark brown liquid, upper crustal some areas
There is petroleum storage.Main component is the mixture of various alkane, cycloalkane and aromatic hydrocarbon.Oil has biogenic deposit into oil machine reason
Become oil and the oily two kinds of theories of petrochemical industry, the former more widely receives, it is believed that oil be ancient times ocean or lake in biology by very long
Evolution formed, belong to biogenic deposit become oil, it is non-renewable；The latter thinks that oil is generated by the carbon of itself in the earth's crust, with life
Thing is unrelated, renewable.Oil is mainly used as fuel oil and gasoline, and many chemical industries, as solution, chemical fertilizer,
The raw material of insecticide and plastics etc..
During oil exploitation, oil often with sandstone one piece be extracted, it is necessary to which sandstone is filtered out
Use could be processed, for people when by artificial filter's oil, high labor cost, the amount of labour is big, time-consuming and laborious, in people
During work filtering oil, oil can make the skin and clothing of people dirty, make troubles for the work of people.
The content of the invention
（One）The technical problem of solution
In view of the deficiencies of the prior art, the present invention provides a kind of sandstone filtration apparatus of oil, solve in oil exploitation
During, oil often with sandstone one piece be extracted, it is necessary to which sandstone, which is filtered out, could process use, Ren Men
When by artificial filter's oil, high labor cost, the amount of labour is big, time-consuming and laborious, during artificial filter's oil, stone
Oil can make the skin and clothing of people dirty, the problem of making troubles for the work of people.
（Two）Technical solution
To achieve the above object, the present invention provides following technical solution：A kind of sandstone filtration apparatus of oil, including babinet, institute
The upper surface of babinet to be stated to be fixedly connected with the lower surface of baffle, the left surface of the baffle is fixedly connected with the right end of fixed column,
The left end of the fixed column is fixedly connected with the fuselage of dual-axle motor, and the output shaft of the front and back of the dual-axle motor is solid
Surely turntable is connected with, the front of the turntable is fixedly connected with the one end at the shaft back side, and the outer surface of the shaft is socketed with axis
Hold, the outer surface of the bearing is fixedly connected with the top of traction rope, and the bottom of the traction rope and the upper surface of ash can are consolidated
Fixed connection, the lower surface of the ash can is provided with filter screen, and the left and right sides of ash can have been fixedly connected with sliding block, and
Two sliding blocks are separately positioned in the sliding slot that cabinet wall left and right sides open up, the lower surface of the sliding block and telescopic device
Top is fixedly connected, and the bottom of telescopic device is fixedly connected with the lower surface of sliding slot inner wall, and the right flank of the babinet is set
There is valve, and the lower surface of babinet is fixedly connected with the top of support device, the upper surface of the babinet and the lower surface of pipe sleeve
It is fixedly connected, the pipe sleeve is located at the left side of baffle, and the inside of pipe sleeve is socketed with petroleum pipeline, bottom and the oil of the petroleum pipeline
The upper surface of pump is connected, and the right flank of the oil pump is fixedly connected with the left surface of babinet, and the left surface of oil pump and oil inlet
The right end of pipe is connected.
Preferably, the back side of the babinet is provided with storage battery, and the back side of storage battery is provided with control panel.
Preferably, the output terminal of the storage battery is electrically connected with the input terminal of control panel, and the output terminal of control panel
The input terminal with dual-axle motor, electric pushrod and oil pump is electrically connected respectively.
Preferably, the lower surface of the babinet is provided with four universal wheels, and four universal wheels are located at babinet following table respectively
The four corners in face.
Preferably, the telescopic device includes telescopic rod, and the outer surface of telescopic rod is socketed with spring, the telescopic rod and
The top of spring is fixedly connected with the lower surface of sliding block, and lower surface of the bottom of telescopic rod and spring with sliding slot inner wall is consolidated
Fixed connection.
Preferably, the support device includes electric pushrod, and the top of the electric pushrod and the lower surface of babinet are fixed
Connection, and the bottom of electric pushrod is fixedly connected with the upper surface of pressing plate.
（Three）Beneficial effect
The present invention provides a kind of sandstone filtration apparatus of oil, possesses following beneficial effect：
（1）, the processing oil waste residue filtration apparatus, by control panel, oil pump, petroleum pipeline, dual-axle motor, turntable, bearing,
Cooperation between shaft, traction rope, ash can, filter screen, sliding slot, sliding block, telescopic rod and spring, oil is controlled by control panel
Oil is transported in ash can by pump work, oil pump by operating by petroleum pipeline, and oil is flowed into babinet along filter screen, etc.
Being finished to oil transportation, people control dual-axle motor to work by control panel, and the output shaft of dual-axle motor drives turntable rotation,
Turntable is rotated up by rotating band dynamic bearing, and bearing drives ash can to move up by traction rope, and spring and telescopic rod are stretched
Long, then turntable is rotated down by rotating band dynamic bearing, and spring and telescopic rod drive ash can to move down by shrinking, instead
It is multiple so as to accelerate the rate of filtration of oil, to reduce cost of labor and the amount of labour of people several times, avoid because artificial filter
And cause oil to make the skin or clothing of people dirty, the work efficiency of people is improved, is work of the people in filtering oil
Brought convenience in work.
（2）, the processing oil waste residue filtration apparatus, by the cooperation between control panel, electric pushrod and pressing plate, lead to
Control panel control electric pushrod work is crossed, electric pushrod is moved down by elongated dynamic pressure plate and overlapped up to ground, from
And can be with static housing so that babinet is not easily shifted, and which has a compact structure and a reasonable design of the present invention, highly practical.
Brief description of the drawings
Fig. 1 is the cross-sectional view that the present invention faces；
Fig. 2 is the cross-sectional view of left view of the present invention.
In figure：1 babinet, 2 baffles, 3 fixed columns, 4 dual-axle motors, 5 turntables, 6 shafts, 7 bearings, 8 traction ropes, 9 ash cans,
10 sliding blocks, 11 sliding slots, 12 telescopic devices, 121 telescopic rods, 122 springs, 13 filter screens, 14 valves, 15 pipe sleeves, 16 petroleum pipelines, 17
Oil pump, 18 oil inlet pipes, 19 universal wheels, 20 storage batteries, 21 control panels, 22 support devices, 221 electric pushrods, 222 pressing plates.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
As shown in Figs. 1-2, the present invention provides a kind of technical solution：A kind of sandstone filtration apparatus of oil, including babinet 1,
The back side of babinet 1 is provided with storage battery 20, and the back side of storage battery 20 is provided with control panel 21, by setting storage battery 20,
So that people, in the case of no external power supply, storage battery 20 can provide electric power, the output terminal of storage battery 20 and control
The input terminal of panel 21 is electrically connected, and the output terminal of control panel 21 respectively with dual-axle motor 4, electric pushrod 221 and oil pump 17
Input terminal be electrically connected, by setting control panel 21 so that people can by control panel 21 control dual-axle motor 4,
Electric pushrod 221 and oil pump 17 work, the operation being convenient for people to, and the lower surface of babinet 1 is provided with four universal wheels 19, and four
Universal wheel 19 is located at the four corners of 1 lower surface of babinet respectively, by setting universal wheel 19, so that universal wheel 19 can pass through rotation
Turn drive babinet 1 and realize movement, the upper surface of babinet 1 is fixedly connected with the lower surface of baffle 2, the left surface of baffle 2 and fixation
The right end of column 3 is fixedly connected, and the left end of fixed column 3 is fixedly connected with the fuselage of dual-axle motor 4, by setting dual-axle motor 4, from
And allow two output shafts of dual-axle motor 4 to drive two turntables 5 to rotate, the output shaft of the front and back of dual-axle motor 4
Turntable 5 is fixedly connected with, the front of turntable 5 is fixedly connected with the one end at 6 back side of shaft, and the outer surface of shaft 6 is socketed with axis
7 are held, by setting bearing 7, so that turntable 5 can pull traction rope 8 to move up when rotation by bearing 7, axis
Hold 7 outer surface to be fixedly connected with the top of traction rope 8, by setting traction rope 8, so that traction rope 8 can drive waste material
Case 9 moves up, and the bottom of traction rope 8 is fixedly connected with the upper surface of ash can 9, and the lower surface of ash can 9 is provided with filtering
Net 13, and the left and right sides of ash can 9 have been fixedly connected with sliding block 10, by setting sliding block 10, sliding block 10 can be fixed useless
Hopper 9 simultaneously follows ash can 9 to move up and down, and two sliding blocks 10 are separately positioned on the cunning that 1 inner wall left and right sides of babinet open up
In groove 11, the lower surface of sliding block 10 is fixedly connected with the top of telescopic device 12, and telescopic device 12 includes telescopic rod 121, and stretches
The outer surface of contracting bar 121 is socketed with spring 122, and the top of telescopic rod 121 and spring 122 is fixed with the lower surface of sliding block 10 to be connected
Connect, and lower surface of the bottom of telescopic rod 121 and spring 122 with 11 inner wall of sliding slot is fixedly connected, by setting telescopic rod 121
With spring 122 so that telescopic rod 121 and spring 122 can drive ash can 9 move up and down by flexible, and telescopic device
12 bottom is fixedly connected with the lower surface of 11 inner wall of sliding slot, and the right flank of babinet 1 is provided with valve 14, by setting valve
14, so that people can be poured out oil by opening valve 14, and the lower surface of babinet 1 and the top of support device 22 are consolidated
Fixed connection, support device 22 include electric pushrod 221, and the top of electric pushrod 221 is fixedly connected with the lower surface of babinet 1, and
The bottom of electric pushrod 221 is fixedly connected with the upper surface of pressing plate 222, by setting electric pushrod 221 and pressing plate 222, so that
Electric pushrod 221 is set to be moved up and down by flexible with dynamic pressure plate 222, the upper surface and the lower surface of pipe sleeve 15 of babinet 1 are consolidated
Fixed connection, pipe sleeve 15 is located at the left side of baffle 2, and the inside of pipe sleeve 15 is socketed with petroleum pipeline 16, bottom and the oil of petroleum pipeline 16
The upper surface of pump 17 is connected, by setting oil pump 17, so that oil pump 17 at work can be by oil transportation to petroleum pipeline
In 16, the right flank of oil pump 17 is fixedly connected with the left surface of babinet 1, and the right end phase of the left surface of oil pump 17 and oil inlet pipe 18
Connection.
In use, oil inlet pipe 18 is put into oil field by people first, 221 work of electric pushrod is then controlled by control panel 21
Make, electric pushrod 221 is moved down by elongated dynamic pressure plate 222 until being overlapped with ground, so that static housing 1, makes babinet 1
No longer move, then worked by 21 control oil pump 17 of control panel, oil pump 17 is defeated by petroleum pipeline 16 by oil by operating
It is sent in ash can 9, oil is flowed into babinet 1 along filter screen 13, and when oil transportation finishes, people pass through control panel 21
Control dual-axle motor 4 works, and the output shaft of dual-axle motor 4 drives turntable 5 to rotate, and turntable 5 is revolved upwards by rotating band dynamic bearing 7
Turn, bearing 7 drives ash can 9 to move up by traction rope 8, and spring 122 and telescopic rod 121 extend, and then turntable 5 passes through rotation
Turn band dynamic bearing 7 to be rotated down, spring 122 and telescopic rod 121 drive ash can 9 to move down by shrinking, and are repeated several times, add
The rate of filtration of fast oil, when oil filtering finishes, people close oil pump 17, dual-axle motor 4 by control panel 21, then
Electric pushrod 221 is controlled to work by control panel 21, electric pushrod 221 is moved up by shrinkage band dynamic pressure plate 222 so that
Pressing plate 222 and surface separation, then stop electric pushrod 221 by control panel 21, promote babinet 1 to leave.
It can to sum up obtain,（1）, the processing oil waste residue filtration apparatus, by control panel 21, oil pump 17, petroleum pipeline 16,
Dual-axle motor 4, turntable 5, bearing 7, shaft 6, traction rope 8, ash can 9, filter screen 13, sliding slot 11, sliding block 10, telescopic rod 121
Cooperation between spring 122, is worked by 21 control oil pump 17 of control panel, and oil is passed through oil transportation by oil pump 17 by operating
Pipe 16 is transported in ash can 9, and oil is flowed into babinet 1 along filter screen 13, and when oil transportation finishes, people pass through control
Panel 21 controls dual-axle motor 4 to work, and the output shaft of dual-axle motor 4 drives turntable 5 to rotate, and turntable 5 is by rotating band dynamic bearing 7
Rotate up, bearing 7 drives ash can 9 to move up by traction rope 8, and spring 122 and telescopic rod 121 extend, then turntable 5
It is rotated down by rotating band dynamic bearing 7, spring 122 and telescopic rod 121 drive ash can 9 to move down by shrinking, repeatedly
Several times, so as to accelerate the rate of filtration of oil, cost of labor and the amount of labour of people are reduced, avoid because artificial filter and
Cause oil to make the skin or clothing of people dirty, improve the work efficiency of people, be work of the people in filtering oil
In bring convenience.
（2）, the processing oil waste residue filtration apparatus, by between control panel 21, electric pushrod 221 and pressing plate 222
Cooperation, control electric pushrod 221 to work by control panel 21, electric pushrod 221 is by elongated dynamic pressure plate 222 to moving down
It is dynamic to be overlapped up to ground, so as to static housing 1 so that babinet 1 is not easily shifted, and the present invention is compact-sized, and design is closed
Reason, it is highly practical.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of sandstone filtration apparatus of oil, including babinet（1）, it is characterised in that：The babinet（1）Upper surface and baffle
（2）Lower surface be fixedly connected, the baffle（2）Left surface and fixed column（3）Right end be fixedly connected, the fixed column
（3）Left end and dual-axle motor（4）Fuselage be fixedly connected, the dual-axle motor（4）Front and back output shaft it is solid
Surely it is connected with turntable（5）, the turntable（5）Front and shaft（6）The one end at the back side is fixedly connected, the shaft（6）It is outer
Surface is socketed with bearing（7）, the bearing（7）Outer surface and traction rope（8）Top be fixedly connected, the traction rope（8）
Bottom and ash can（9）Upper surface be fixedly connected, the ash can（9）Lower surface be provided with filter screen（13）, and it is useless
Hopper（9）Left and right sides be fixedly connected with sliding block（10）, and two sliding blocks（10）It is separately positioned on babinet（1）Inner wall is left
The sliding slot that right two sides open up（11）It is interior, the sliding block（10）Lower surface and telescopic device（12）Top be fixedly connected, and
Telescopic device（12）Bottom and sliding slot（11）The lower surface of inner wall is fixedly connected, the babinet（1）Right flank be provided with valve
Door（14）, and babinet（1）Lower surface and support device（22）Top be fixedly connected, the babinet（1）Upper surface and pipe
Set（15）Lower surface be fixedly connected, the pipe sleeve（15）Positioned at baffle（2）Left side, and pipe sleeve（15）Inside be socketed with it is defeated
Oil pipe（16）, the petroleum pipeline（16）Bottom and oil pump（17）Upper surface be connected, the oil pump（17）Right flank with
Babinet（1）Left surface be fixedly connected, and oil pump（17）Left surface and oil inlet pipe（18）Right end be connected.
A kind of 2. sandstone filtration apparatus of oil according to claim 1, it is characterised in that：The babinet（1）The back side
It is provided with storage battery（20）, and storage battery（20）The back side be provided with control panel（21）.
A kind of 3. sandstone filtration apparatus of oil according to claim 1, it is characterised in that：The support device（22）Bag
Include electric pushrod（221）, the electric pushrod（221）Top and babinet（1）Lower surface be fixedly connected, and electric pushrod
（221）Bottom and pressing plate（222）Upper surface be fixedly connected.
A kind of 4. sandstone filtration apparatus of oil according to claim 1, it is characterised in that：The babinet（1）Following table
Face is provided with four universal wheels（19）, and four universal wheels（19）It is located at babinet respectively（1）The four corners of lower surface.
A kind of 5. sandstone filtration apparatus of oil according to claim 1, it is characterised in that：The telescopic device（12）Bag
Include telescopic rod（121）, and telescopic rod（121）Outer surface be socketed with spring（122）, the telescopic rod（121）And spring（122）
Top and sliding block（10）Lower surface be fixedly connected, and telescopic rod（121）And spring（122）Bottom and sliding slot（11）
The lower surface of inner wall is fixedly connected.
A kind of 6. sandstone filtration apparatus of oil according to claim 2, it is characterised in that：The storage battery（20）It is defeated
Outlet and control panel（21）Input terminal be electrically connected, and control panel（21）Output terminal respectively with dual-axle motor（4）, it is electronic
Push rod（221）And oil pump（17）Input terminal be electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711302943.XA CN107989593A (en) | 2017-12-11 | 2017-12-11 | A kind of sandstone filtration apparatus of oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711302943.XA CN107989593A (en) | 2017-12-11 | 2017-12-11 | A kind of sandstone filtration apparatus of oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107989593A true CN107989593A (en) | 2018-05-04 |
Family
ID=62037025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711302943.XA Pending CN107989593A (en) | 2017-12-11 | 2017-12-11 | A kind of sandstone filtration apparatus of oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107989593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108729890A (en) * | 2018-05-23 | 2018-11-02 | 杨兰保 | A kind of oil exploitation oil rig |
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| CN106914062A (en) * | 2017-04-20 | 2017-07-04 | 冷国强 | A kind of petroleum collection petroleum efficient filter |
| CN206642462U (en) * | 2017-02-28 | 2017-11-17 | 邵越海 | A kind of miscellaneous machine in kitchen of melt cinder separation |
| CN206688355U (en) * | 2017-04-29 | 2017-12-01 | 高伟 | The filter defeated for oil gathering |
| CN206700932U (en) * | 2017-04-26 | 2017-12-05 | 郑皓月 | A kind of efficient oil filter |
| CN107442526A (en) * | 2017-10-09 | 2017-12-08 | 江阴市永昌交通机械部件有限公司 | A kind of flexible axle surface automatic dust removing apparatus |
-
2017
- 2017-12-11 CN CN201711302943.XA patent/CN107989593A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206642462U (en) * | 2017-02-28 | 2017-11-17 | 邵越海 | A kind of miscellaneous machine in kitchen of melt cinder separation |
| CN106914062A (en) * | 2017-04-20 | 2017-07-04 | 冷国强 | A kind of petroleum collection petroleum efficient filter |
| CN206700932U (en) * | 2017-04-26 | 2017-12-05 | 郑皓月 | A kind of efficient oil filter |
| CN206688355U (en) * | 2017-04-29 | 2017-12-01 | 高伟 | The filter defeated for oil gathering |
| CN107442526A (en) * | 2017-10-09 | 2017-12-08 | 江阴市永昌交通机械部件有限公司 | A kind of flexible axle surface automatic dust removing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108729890A (en) * | 2018-05-23 | 2018-11-02 | 杨兰保 | A kind of oil exploitation oil rig |
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Application publication date: 20180504 |
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