CN204307904U - Steam-type residual oil extracting instrument - Google Patents
Steam-type residual oil extracting instrument Download PDFInfo
- Publication number
- CN204307904U CN204307904U CN201420702288.2U CN201420702288U CN204307904U CN 204307904 U CN204307904 U CN 204307904U CN 201420702288 U CN201420702288 U CN 201420702288U CN 204307904 U CN204307904 U CN 204307904U
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- China
- Prior art keywords
- steam
- residual oil
- oil
- pipe
- internal diameter
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- 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.)
- Expired - Fee Related
Links
- 210000004907 gland Anatomy 0.000 claims abstract description 23
- 238000000926 separation method Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 165
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Abstract
The utility model discloses a kind of steam-type residual oil extracting instrument, comprising: an oil inlet pipe with one first internal diameter; One pressure guiding pipe, is inserted in this oil inlet pipe top, and this pressure guiding pipe upper end connects power steam generating means, and lower end extends in parallel on the right side of this oil inlet pipe; One suction tube with one second internal diameter, be connected to this oil inlet pipe right-hand member, this second internal diameter is less than this first internal diameter; The one fuel-displaced gland steam exhauster with one the 3rd internal diameter, the 3rd internal diameter is greater than this second internal diameter; One oil guide pipe, is connected to this fuel-displaced gland steam exhauster bottom.The utility model can solve the large problem of existing Residual Oil Tank residual oil cleaning labour intensity.
Description
Technical field
The utility model relates to oil refining device blowdown instrument, particularly the cleanout tool of residual oil bottom a kind of petrochemical industry fuel oil, Residual Oil Tank.
Background technology
In refinery maintenance, the residual oil cleaning of Residual Oil Tank is the difficult point of construction.Residual Oil Tank needs large (the as many as 25m sometimes of the residual oil amount of cleaning
3), but Residual Oil Tank bottom part is furnished with heat(ing) coil, and the gap between coil pipe little (about 200mm), dredge pump can only be arranged to coil pipe top, causes the residual oil of below coil pipe to extract out.
For addressing this problem, the mode used in prior art is generally workmen and enters Residual Oil Tank inside processing, and the instrument of use is self-control baler, and namely personnel manually dip residual oil from the gap of coil pipe.But the method has a lot of problem: first, Residual Oil Tank bottom sides one-man hole, working space is narrow and small, and residual oil is not only sticky but also thick, and self drainage is poor, and flowing slowly, is cleared up very difficult; Secondly, owing to not having suitable cleaning tool, working space is limited in addition, and thus the method labour intensity is large, and inefficiency takies again a large amount of labour; Further, in Residual Oil Tank, gas concentration is high, and operating environment is severe, is unfavorable for that workmen's is healthy.As mentioned above, the residual oil method for cleaning that prior art uses, not only labour intensity is large, inefficiency, and also can bring very high operating risk.
Correlation technique of the prior art, as Fig. 1, shown in Fig. 2, Chinese patent CN200910034994 discloses a kind of oily water separating and treating apparatus, comprise heater, gravity separator, suction pump, first sieve plate, filtering material filter, film processor, infiltration water valve, check-valves, anti-siphonage pipe, kingston valve, return valve, stop valve washed by medicine, dosing pump, medicine-chest, draining valve, gas backwash valve, medicine-chest stop valve, filter drain valve, filter drain valve, Separation of Water dump valve, backwash tube, blowoff valve, greasy dirt water station, waste oil pool, waste oil drain valve, oily water transfer valve, filtered water discharge valve, water discharging valve, filtering material filter, one-level filtering material filter, secondary filtering material filter etc., but this apparatus structure is complicated, be not suitable for yet the utility model for Residual Oil Tank.
Therefore, how to provide a kind of residual oil aspirator, make it can solve defect of the prior art, namely become those skilled in the art's problem demanding prompt solution.
Utility model content
The purpose of this utility model is to provide a kind of steam-type residual oil extracting instrument, solves the problem that existing Residual Oil Tank residual oil cleaning labour intensity is large.
For achieving the above object, the utility model provides a kind of steam-type residual oil extracting instrument, is placed in for aspirating residual oil at the bottom of a Residual Oil Tank, and this steam-type residual oil extracting instrument comprises:
One oil inlet pipe with one first internal diameter;
One pressure guiding pipe, is inserted in this oil inlet pipe top, and this pressure guiding pipe upper end connects power steam generating means, and lower end extends in parallel on the right side of this oil inlet pipe;
One suction tube with one second internal diameter, be connected to this oil inlet pipe right-hand member, this second internal diameter is less than this first internal diameter;
The one fuel-displaced gland steam exhauster with one the 3rd internal diameter, the 3rd internal diameter is greater than this second internal diameter;
One oil guide pipe, is connected to this fuel-displaced gland steam exhauster bottom.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, the 3rd internal diameter equals this first internal diameter.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe, this pressure guiding pipe, this suction tube, this fuel-displaced gland steam exhauster and this oil guide pipe are steel pipe.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe left end opening is an oil-in.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this pressure guiding pipe tilts to insert this oil inlet pipe top.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this power steam generating means of this pressure guiding pipe upper end is steam pipe system or steam raising plant; This pressure guiding pipe connects steam pipe system or steam raising plant by rubber hose.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this exit, pressure guiding pipe lower end has a nozzle; This nozzle is reducing shape.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe inner space is a mixing chamber, and between this exit, pressure guiding pipe lower end and oil inlet pipe right-hand member, (i.e. the right side of this mixing chamber) is a negative pressure of vacuum district.In this mixing chamber, make using steam as power mixing chamber form negative pressure of vacuum district, thus reach the effect of extracting residual oil out.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, evacuation tube space is penetrate vapour suction chamber.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, the inner space of this fuel-displaced gland steam exhauster is a separation chamber, and this fuel-displaced gland steam exhauster right-hand member is a venthole, and this venthole connects a bosh; This venthole of this separation chamber connects bosh by rubber hose.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil guide pipe upper end is connected to this fuel-displaced gland steam exhauster bottom, for deriving residual oil; This oil guide pipe lower end (oil-out) connects oil groove; This oil guide pipe lower end connects oil groove by rubber hose.
Steam-type residual oil extracting instrument of the present utility model, its know-why is:
Nozzle power steam being entered pressure guiding pipe is spouting, make it enter mixing chamber and produce negative pressure of vacuum, deep fat in Residual Oil Tank is drawn into oil-in, and flow under the steam expanded at a high speed blows and penetrate vapour suction chamber and enter oil guide pipe, residual oil is imported in oil groove, remove the residual oil bottom Residual Oil Tank with this.
Steam-type residual oil extracting instrument of the present utility model, its using method flow process is as follows:
1) pass into steam before using and enter Residual Oil Tank, with heated resid;
2) insert bottom Residual Oil Tank by steam-type residual oil extracting instrument of the present utility model, in Residual Oil Tank of being submerged by oil-in under residual oil liquid level, gas outlet connects bosh, and oil guide pipe connects oil groove;
3) power steam is passed in oil inlet pipe by pressure guiding pipe; Because steam self is with pressure, and nozzle is reducing, therefore power steam can be spouting through the nozzle of pressure guiding pipe, then to expand acceleration, enter mixing chamber and produce negative pressure of vacuum, deep fat in Residual Oil Tank is drawn into oil-in, and flows under the steam expanded at a high speed blows and penetrate vapour suction chamber and enter oil guide pipe;
4) by downward for the mouth of pipe of oil guide pipe, oil guide pipe lower end outlet (oil-out) overlaps rubber hose and flexible pipe outlet is inserted in oil groove, is immersed in below oil groove liquid level, and makes Residual Oil Tank liquid level higher than oil groove liquid level or be substantially consistent, thus, residual oil flows in oil groove;
5) right-hand member venthole in separation chamber's connects rubber hose, its flexible pipe mouth of pipe inserts bosh, insertion depth remains on about 0.2m, the rubber hose that the steam at a high speed that expands is connected by venthole flows to bosh, be rapidly cooled because steam enters tank, volume reduces rapidly, and suction chamber produces negative pressure, further enhancing the pumping efficiency of suction chamber.
Steam-type residual oil extracting instrument of the present utility model, its technique effect is:
1) material making parts easily obtains, and manufacture craft is simple; Steam as extracting, purging power directly can use the steam of the Steam Heating pipe network of oil plant; Further, reusable after residual oil extracting tool making completes, the residual oil at the bottom of cleaning different device Residual Oil Tank, has good application value.
2) reduce labour intensity, improve efficiency, save labour, thus reduce cost; Reduce operating risk, improve operating environment; With the object that this reaches safety, high-efficient cleaning removes residual oil operation,
3) simple to operate, easily control, stable, safe and reliable.
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail, but not as to restriction of the present utility model.
Accompanying drawing explanation
Fig. 1, Fig. 2 are prior art schematic diagram;
Fig. 3 is steam-type residual oil extracting instrument front view of the present utility model;
Fig. 4 is steam-type residual oil extracting instrument sectional view () of the present utility model;
Fig. 5 is steam-type residual oil extracting instrument sectional view (two) of the present utility model.
Wherein, Reference numeral:
(prior art)
1a heater
2a gravity separator
3a suction pump
4a is sieve plate just
5a filtering material filter
6a film processor
7a permeates water valve
8a check-valves
9a anti-siphonage pipe
10a kingston valve
11a return valve
Stop valve washed by 12a medicine
13a dosing pump
14a medicine-chest
15a draining valve
16a gas backwash valve
17a medicine-chest stop valve
18a filter drain valve
19a filter drain valve
20a Separation of Water dump valve
21a backwash tube
22a blowoff valve
23a greasy dirt water station
24a waste oil pool
25a waste oil drain valve
26a oily water transfer valve
27a filtered water discharge valve
28a water discharging valve
5a filtering material filter
51a one-level filtering material filter
52a secondary filtering material filter
(the utility model)
1 oil inlet pipe
11 mixing chambers
12 oil-ins
13 negative pressure of vacuum districts
2 pressure guiding pipes
21 nozzles
3 suction tubes
31 penetrate vapour suction chamber
4 fuel-displaced gland steam exhausters
41 separation chambers
42 ventholes
5 oil guide pipes
L1 ~ L3: length
D1 ~ D3: internal diameter
θ 1, θ 2: angle
Detailed description of the invention
Relevant detailed content of the present utility model and technology illustrate, be now described further with embodiment, but it is to be understood that these embodiments are only the use illustrated, and should not be interpreted as restriction of the present utility model.
Please refer to Fig. 3 to Fig. 5, the utility model provides a kind of steam-type residual oil extracting instrument, is placed in for aspirating residual oil at the bottom of a Residual Oil Tank, and this steam-type residual oil extracting instrument comprises:
One oil inlet pipe 1 with one first internal diameter;
One pressure guiding pipe 2, is inserted in this oil inlet pipe 1 top, and this pressure guiding pipe 2 upper end connects power steam generating means, and lower end extends in parallel on the right side of this oil inlet pipe 1;
One suction tube 3 with one second internal diameter, be connected to this oil inlet pipe 1 right-hand member, this second internal diameter is less than this first internal diameter;
One fuel-displaced gland steam exhauster the 4, three internal diameter with one the 3rd internal diameter is greater than this second internal diameter;
One oil guide pipe 5, is connected to this fuel-displaced gland steam exhauster 4 bottom.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, the 3rd internal diameter equals this first internal diameter.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe 1, this pressure guiding pipe 2, this suction tube 3, this fuel-displaced gland steam exhauster 4, this oil guide pipe 5 are steel pipe.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe 1 left end opening is an oil-in 12.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this pressure guiding pipe 2 tilts to insert this oil inlet pipe 1 top.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this power steam generating means of this pressure guiding pipe 2 upper end is steam pipe system or steam raising plant; The power steam passed into is 0.3-0.5MPa; This pressure guiding pipe 2 connects steam pipe system or steam raising plant by rubber hose.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this exit, pressure guiding pipe 2 lower end has a nozzle 21; This nozzle 21 is reducing shape.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil inlet pipe 1 inner space is a mixing chamber 11, and between this exit, pressure guiding pipe 2 lower end and oil inlet pipe 1 right-hand member, (i.e. the right side of this mixing chamber 11) is a negative pressure of vacuum district 13.In this mixing chamber 11, make using steam as power mixing chamber 11 form negative pressure of vacuum district 13, thus reach the effect of extracting residual oil out.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, suction tube 3 inner space is penetrate vapour suction chamber 31.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, the inner space of this fuel-displaced gland steam exhauster 4 is a separation chamber 41, and this fuel-displaced gland steam exhauster 4 right-hand member is a venthole 42, and this venthole 42 of this fuel-displaced gland steam exhauster 4 right-hand member connects bosh; The venthole 42 of this separation chamber 41 connects bosh by rubber hose.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, this oil guide pipe 5 upper end is connected to this fuel-displaced gland steam exhauster 4 bottom, for deriving residual oil; This oil guide pipe 5 lower end (oil-out) connects oil groove; This oil guide pipe 5 lower end connects oil groove by rubber hose.
Wherein, in steam-type residual oil extracting instrument one of the present utility model preferred embodiment, all parts size can make according to following standard:
The length L1 of this oil inlet pipe 1 is 350mm-450mm, and the first internal diameter D1 is 40mm-65mm;
This pressure guiding pipe 2 internal diameter is 8mm-14mm, thickness of pipe wall 1.5mm-2mm, and the tilt angle theta 1 of pressure guiding pipe 2 is 30 °-60 °, and the length L11 that this pressure guiding pipe 2 lower end extends in parallel on the right side of this oil inlet pipe 1 is 150-180mm;
This nozzle 21 exit (the narrowest place of reducing) internal diameter is 6mm-12mm, and nozzle 21 is 10mm-15mm with the distance length L12 of suction tube 3 high order end;
The length L2 of this suction tube 3 is 50mm-80mm; Second internal diameter D2 is 30mm-36mm;
The length L3 of this fuel-displaced gland steam exhauster 4 is 350mm-450mm; 3rd internal diameter D3 is 40mm-65mm;
The internal diameter of this oil guide pipe 5 is 25mm-35mm, thickness of pipe wall 1.5mm-2mm, and the tilt angle theta 2 of oil guide pipe 5 is 30 °-60 °.
But it is to be noted, number range cited is not above as restriction of the present utility model, as long as the power steam of pressure 0.3-0.5MPa passed into pressure guiding pipe the middle part that Fig. 3 ~ Fig. 5 illustrates to inside contract shape steel tube, just can realize technique effect of the present utility model, those skilled in the art can adjust each part inside diameter and size according to actual conditions, but not are limited in above-mentioned number range.
Steam-type residual oil extracting instrument of the present utility model, can be placed in for aspirating residual oil at the bottom of a Residual Oil Tank, its know-why is:
Nozzle power steam being entered pressure guiding pipe is spouting, make it enter mixing chamber and produce negative pressure of vacuum, deep fat in Residual Oil Tank is drawn into oil-in, and flow under the steam expanded at a high speed blows and penetrate vapour suction chamber and enter oil guide pipe, residual oil is imported in oil groove, remove the residual oil bottom Residual Oil Tank with this.
Steam-type residual oil extracting instrument of the present utility model, details are as follows for its know-why and using method flow process thereof:
1) pass into steam before using and enter Residual Oil Tank, with heated resid;
2) insert bottom Residual Oil Tank by steam-type residual oil extracting instrument of the present utility model, in Residual Oil Tank of being submerged by oil-in 12 under residual oil liquid level, gas outlet 42 connects bosh, and oil guide pipe 5 connects oil groove;
3) power steam is passed in oil inlet pipe 1 by pressure guiding pipe 2; Because steam self is with pressure, and nozzle 21 is reducing, therefore power steam can be spouting through the nozzle 21 of pressure guiding pipe 2, then to expand acceleration, enter mixing chamber 11 and produce negative pressure of vacuum, deep fat in Residual Oil Tank is drawn into oil-in 12, and flows under the steam expanded at a high speed blows and penetrate vapour suction chamber 31 and enter oil guide pipe 5;
4) by downward for the mouth of pipe of oil guide pipe 5, oil guide pipe 5 lower end outlet (oil-out) overlaps rubber hose and flexible pipe outlet is inserted in oil groove, is immersed in below oil groove liquid level, and makes Residual Oil Tank liquid level higher than oil groove liquid level or be substantially consistent, thus, residual oil flows in oil groove;
5) separation chamber 41 right-hand member venthole 42 connects rubber hose, its flexible pipe mouth of pipe inserts bosh, insertion depth remains on about 0.2m, the rubber hose that the steam at a high speed that expands is connected by venthole 42 flows to bosh, be rapidly cooled because steam enters tank, volume reduces rapidly, and suction chamber 31 produces negative pressure, further enhancing the pumping efficiency of suction chamber 31.
Steam-type residual oil extracting instrument of the present utility model, its technique effect is:
1) material making parts easily obtains, and manufacture craft is simple; Steam as extracting, purging power directly can use the steam of the Steam Heating pipe network of oil plant; Further, reusable after residual oil extracting tool making completes, the residual oil at the bottom of cleaning different device Residual Oil Tank, has good application value.
2) reduce labour intensity, improve efficiency, save labour, thus reduce cost; Reduce operating risk, improve operating environment; With the object that this reaches safety, high-efficient cleaning removes residual oil operation,
3) simple to operate, easily control, stable, safe and reliable.
Certainly; the utility model also can have other various embodiments; when not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the utility model, but these change accordingly and are out of shape the protection domain that all should belong to the utility model claim.
Claims (10)
1. a steam-type residual oil extracting instrument, be placed in for aspirating residual oil at the bottom of a Residual Oil Tank, it is characterized in that, this steam-type residual oil extracting instrument comprises:
One oil inlet pipe with one first internal diameter;
One pressure guiding pipe, is inserted in this oil inlet pipe top, and this pressure guiding pipe upper end connects power steam generating means, and lower end extends in parallel on the right side of this oil inlet pipe;
One suction tube with one second internal diameter, be connected to this oil inlet pipe right-hand member, this second internal diameter is less than this first internal diameter;
The one fuel-displaced gland steam exhauster with one the 3rd internal diameter, the 3rd internal diameter is greater than this second internal diameter;
One oil guide pipe, is connected to this fuel-displaced gland steam exhauster bottom.
2. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this oil inlet pipe, this pressure guiding pipe, this suction tube, this fuel-displaced gland steam exhauster and this oil guide pipe are steel pipe.
3. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this oil inlet pipe left end opening is an oil-in.
4. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this pressure guiding pipe tilts to insert this oil inlet pipe top.
5. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this power steam generating means of this pressure guiding pipe upper end is steam pipe system or steam raising plant.
6. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this exit, pressure guiding pipe lower end has a nozzle.
7. steam-type residual oil extracting instrument according to claim 1, it is characterized in that, this oil inlet pipe inner space is a mixing chamber, is a negative pressure of vacuum district between this exit, pressure guiding pipe lower end and oil inlet pipe right-hand member.
8. steam-type residual oil extracting instrument according to claim 1, it is characterized in that, this evacuation tube space is penetrate vapour suction chamber.
9. steam-type residual oil extracting instrument according to claim 1, is characterized in that, the inner space of this fuel-displaced gland steam exhauster is a separation chamber, and this fuel-displaced gland steam exhauster right-hand member is a venthole, and this venthole connects a bosh.
10. steam-type residual oil extracting instrument according to claim 1, is characterized in that, this oil guide pipe upper end is connected to this fuel-displaced gland steam exhauster bottom, and lower end connects oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702288.2U CN204307904U (en) | 2014-11-20 | 2014-11-20 | Steam-type residual oil extracting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420702288.2U CN204307904U (en) | 2014-11-20 | 2014-11-20 | Steam-type residual oil extracting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204307904U true CN204307904U (en) | 2015-05-06 |
Family
ID=53130236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420702288.2U Expired - Fee Related CN204307904U (en) | 2014-11-20 | 2014-11-20 | Steam-type residual oil extracting instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204307904U (en) |
-
2014
- 2014-11-20 CN CN201420702288.2U patent/CN204307904U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 |