CN106731164A - A kind of gas-removing filter - Google Patents
A kind of gas-removing filter Download PDFInfo
- Publication number
- CN106731164A CN106731164A CN201710022954.6A CN201710022954A CN106731164A CN 106731164 A CN106731164 A CN 106731164A CN 201710022954 A CN201710022954 A CN 201710022954A CN 106731164 A CN106731164 A CN 106731164A
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- China
- Prior art keywords
- cylinder
- gas
- inner cylinder
- outlet
- removing filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A kind of gas-removing filter, including cylinder and the entrance for being arranged on cylinder side, inner barrel are provided with filter cylinder, and cartridge top portion is fixedly connected exhaust apparatus and is connected with exhaust apparatus, enters opening's edge cylinder lateral wall tangentially-arranged；Cylinder top is provided with the opening coordinated with exhaust apparatus, exhaust apparatus includes inner cylinder, inner cylinder top is through opening and extends to outside cylinder, inner cylinder top is provided with sealing device, sealing device is provided with exhaust outlet and the air bleeding valve installed in exhaust ports, and the ball float coordinated with air bleeding valve is additionally provided with inner cylinder；Horizontal plane where flow-guiding mouth, flow-guiding mouth is evenly distributed with the wall of inner cylinder side less than horizontal plane where ball float；Cylinder body bottom is provided with outlet, and exit is provided with outlet, and one end of outlet connects with filter cylinder bottom, and the other end passes through and exports and extend to outside cylinder.The present invention makes gas be separated with fluid by centrifugal force, and gas can be helped to be escaped from fluid in time, reaches exhaust thoroughly effect, is equally applicable to the larger situation of oil flow.
Description
Technical field
The present invention relates to a kind of filter of pipeline fluid, and in particular to a kind of gas-removing filter.
Background technology
Gas-removing filter is one of auxiliary device of flowmeter, can be isolated the solid impurity and gas in pipeline fluid
Come, it is to avoid the measuring accuracy of solid impurity and gases affect flowmeter in fluid, extend the service life of flowmeter.
After fluid enters gas-removing filter, by the internal screen pack for setting, solid impurity is removed, liquid was passing through
During net-filter assembly, flow direction can be changed, make free gas in oil product and be partly dissolved gas fully to run out of, and be gathered in and disappear
The top of air filter, forms the gas compartment, the interface of oil and gas occurs.Increase as gas increases pressure, the interface of oil and gas declines, and floats
Ball declines with the interface of oil and gas, and air valve is opened excludes gas, and after gas is excluded, ball float rises with the interface of oil and gas, and air valve is closed, from
And reach the purpose of gas, liquid, solid three separation.
Existing gas-removing filter makes fluid when by screen modules mainly by setting dividing plate in screen modules
Change flow direction, so that the gas effusion in fluid, but this mode is completely by gas itself effusion, in larger flow velocity
In the case of, gas can be caused to escape not in time, it is vented not thorough.
The content of the invention
It is an object of the invention to：Halfway problem is vented for above-mentioned existing gas-removing filter, the present invention provides one
Plant gas-removing filter.
The technical solution adopted by the present invention is as follows：
A kind of gas-removing filter, including cylinder and the entrance for being arranged on cylinder side, the inner barrel are provided with filter cylinder, filter
Cylinder top be fixedly connected exhaust apparatus and connected with exhaust apparatus, it is described enter opening's edge cylinder lateral wall it is tangentially-arranged；The cylinder top
Portion is provided with the opening coordinated with exhaust apparatus, and the exhaust apparatus includes inner cylinder, and the inner cylinder top is through opening and extends to
Outside cylinder, the inner cylinder top is provided with sealing device, and sealing device is provided with exhaust outlet and the row installed in exhaust ports
Air valve, is additionally provided with the ball float coordinated with air bleeding valve in the inner cylinder；Flow-guiding mouth is evenly distributed with the wall of the inner cylinder side, it is described to lead
Horizontal plane is less than horizontal plane where ball float where head piece；The cylinder body bottom is provided with outlet, and exit is provided with outlet, it is described go out
One end of mouth pipe connects with filter cylinder bottom, and the other end passes through and exports and extend to outside cylinder.
Operation principle of the invention is：When unused, ball float does not receive buoyancy to gas-removing filter, and exhaust ports are in beating
Open state.It is tangentially-arranged due to entering opening's edge cylinder lateral wall when gas-removing filter works, therefore, fluid will be along cylinder inboard wall at a high speed
Eddy flow is formed into and inner barrel, then enters inner cylinder from flow-guiding mouth, fluid tends towards stability in inner cylinder, can stablized and promote
Ball float is up and closes exhaust outlet.In this process, the gas in fluid is escaped from fluid under the influence of centrifugal force, due to
Horizontal plane where flow-guiding mouth is consistently lower than horizontal plane where ball float, and fluid enters from flow-guiding mouth, therefore inner cylinder top can form close
Space is closed, gas can be assembled in the confined space and form the interface of oil and gas, increased as gas increases pressure, under the interface of oil and gas
Drop, ball float declines with the interface of oil and gas, and air bleeding valve is opened discharges gas, and after gas discharge, ball float rises with the interface of oil and gas, exhaust
Valve is closed.Fluid in inner cylinder subsequently enters filter cylinder filtering solid contaminants, is finally flowed out through outlet.The present invention passes through centrifugal force
Gas is separated with fluid, and brought into after inner cylinder in the aggregation of inner cylinder top by fluid, gas can be helped to be escaped from fluid in time,
Exhaust thoroughly effect is reached, the larger situation of oil flow is equally applicable to.
The porch is provided with inlet tube, and inlet tube is used to connect oil pipeline.
The downward-sloping 17 ° of angles of inlet tube, can make fluid when high speed enters in cylinder, and rotation is upwardly formed along inwall
Stream, is conducive to making fluid enter inner cylinder from flow-guiding mouth.
The sealing device is top cover, and inner cylinder top is also associated with the 3rd flange, and the top cover and inner cylinder pass through the 3rd method
Orchid realizes bolt connection.Can be to being sealed at the top of inner cylinder by top cover and the 3rd flange, it is ensured that gas is poly- on inner cylinder top
Collection, and bolt connection has the advantages that simple structure, connection reliability, convenient disassembly to be detachably fixed connection, it is convenient to exhaust
Device is overhauled and cleared up.
The inwall of the inner cylinder lower end is provided with annular erecting bed, and the cartridge top portion is connected with first flange, described first
Flange is horizontally placed on annular erecting bed；One end that the outlet is connected with filter cylinder is provided with base, and filter cylinder lower end is connected with second
Flange, the second flange is placed on base；The first flange, annular erecting bed and second flange realize bolt by screw rod
Connection.Filter cylinder is arranged between inner cylinder and outlet by annular erecting bed and base, and be bolted so that inner cylinder,
Filter cylinder and outlet link into an integrated entity, i.e., be internally formed oil passage in gas-removing filter.Bolt connection is easy to disassemble, works as needs
When cleaning filter residue or replacing filter cylinder, top cover is pulled down together with air bleeding valve, disconnect the connection of first flange and screw rod, you can will
Filter cylinder takes out, and is easy to regular maintenance.
Pulling apparatus are additionally provided with the first flange, pulling apparatus are conducive to force, are easy to take out or install filter cylinder.
The inner cylinder is weldingly fixed at cartridge openings.Inner cylinder and cylinder is set to link into an integrated entity by welding, welding has
Intensity advantage high so that inner cylinder can keep good stability under the constant impingement of fluid.
The inner cylinder is steady liquid pipe.Fluid have just enter into cylinder and exhaust outlet not yet seal when, due to centrifugal action, oil
Liquid flow at high speed can cause exhaust outlet bleed, additionally, the too fast stability that can influence ball float of oil flow, cause air bleeding valve not just
It is normally opened to close so that exhaust is unstable, and steady liquid pipe is then conducive to making the flowing of fluid tend towards stability, and can prevent exhaust outlet bleed,
And ensure ball float reliably working.
The cylinder body outer wall is provided with preceding pressure gauge and rear pressure gauge, and the preceding pressure gauge is connected with cylinder body bottom, presses afterwards
Power table is connected with outlet.As the impurity in filter cylinder gradually increases, gas-removing filter inside increases with the oil liquid pressure difference in exit
Greatly, by preceding pressure gauge and rear manometric reading it is the stopping state that can determine whether filter cylinder, facilitates instrument maintenance, extension instrument to make
Use the life-span.
The cylinder is spherical tank.Spherical tank compared with circle tube tank body, under same volume and uniform pressure, ball
The surface area of shape tank body is minimum, and in the case of same diameter, spherical tank body wall internal stress is minimum and uniform, and bearing capacity compares cylinder
Shape tank body is big 1 times, therefore the wall thickness of spherical tank only needs the half of corresponding circle tube tank body wall thickness.Therefore, using spherical tank, can
The consumption of steel is greatly reduced.
In sum, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. the present invention enters fashionable in cylinder at a high speed by along the tangentially-arranged entrance of cylinder lateral wall, making fluid along cylinder inboard wall
Eddy flow is internally formed, gas is separated with fluid under the action of the centrifugal force, and brought into after inner cylinder by fluid and assemble on inner cylinder top,
Gas can be helped to be escaped from fluid in time, reach exhaust thoroughly effect, be equally applicable to the larger situation of oil flow；
2. inlet porting pipe is downward-sloping, and fluid can be made when high speed enters cylinder inboard wall, and eddy flow is upwardly formed along inwall,
Be conducive to making fluid enter inner cylinder from flow-guiding mouth；
3. demountable structure, convenient inspection will be set between filter cylinder and inner cylinder, filter cylinder and outlet and top cover and inner cylinder
Repair and clear up, be conducive to daily maintenance, extend the service life of gas-removing filter；
4., by setting preceding pressure gauge and rear pressure gauge, the fluid pressure in gas-removing filter inside and exit is detected respectively
Power, can determine whether the stopping state of filter cylinder, facilitate instrument maintenance.
Brief description of the drawings
Fig. 1 is three-dimensional structure diagram of the present invention；
Fig. 2 is side view of the present invention；
Fig. 3 is cut-away view of the present invention；
Fig. 4 is principle of the invention schematic diagram.
Marked in figure：1- cylinders, 2- top covers, 3- handles, 4- entrances, 5- inlet tubes, the flanges of 6- the 3rd, pressure gauge before 7-,
Pressure gauge after 8-, 9- thermometers, 10- inner cylinders, 11- filter cylinders, 12- air bleeding valves, 13- ball floats, 14- flow-guiding mouths, 15- first flanges,
16- annular erecting beds, 17- screw rods, 18- second flanges, 19- outlets, 20- pulling apparatus, 21- bases, 22- eddy flows.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, can be with any
Mode is combined.
The present invention is elaborated with reference to Fig. 1, Fig. 2, Fig. 3 and Fig. 4.
Embodiment 1
A kind of gas-removing filter, including cylinder 1 and the entrance 4 for being arranged on the side of cylinder 1, are provided with filter inside the cylinder 1
Cylinder 11, the top of filter cylinder 11 is fixedly connected exhaust apparatus and is connected with exhaust apparatus, and the entrance 4 is tangentially-arranged along the side wall of cylinder 1；
The top of the cylinder 1 is provided with the opening coordinated with exhaust apparatus, and the exhaust apparatus includes inner cylinder 10, and the top of the inner cylinder 10 is worn
Cross and be open and extend to outside cylinder 1, the top of the inner cylinder 10 is provided with sealing device, and sealing device is provided with exhaust outlet and peace
Mounted in the air bleeding valve 12 of exhaust ports, the ball float 13 coordinated with air bleeding valve 12 is additionally provided with the inner cylinder 10；The side of the inner cylinder 10
Flow-guiding mouth 14 is evenly distributed with wall, the place horizontal plane of the flow-guiding mouth 14 is less than the place horizontal plane of ball float 13；The bottom of the cylinder 1
Portion is provided with outlet, and exit is provided with outlet 19, and one end of the outlet 19 is connected with the bottom of filter cylinder 11, and the other end is passed through out
Mouth is simultaneously extended to outside cylinder 1.
Operation principle of the invention is：Gas-removing filter when unused, ball float 13 do not receive buoyancy, exhaust ports in
Open mode.When gas-removing filter works, because entrance 4 is tangentially-arranged along the side wall of cylinder 1, therefore, fluid will be along the inwall of cylinder 1
Enter at a high speed and be internally formed eddy flow 22 in cylinder 1, then enter inner cylinder 10 from flow-guiding mouth 14, fluid tends to flat in inner cylinder 10
It is slow, can stablize and promote ball float up and close exhaust outlet.In this process, the gas in fluid is under the influence of centrifugal force from oil
Escaped in liquid, because the place horizontal plane of flow-guiding mouth 14 is consistently lower than the place horizontal plane of ball float 13, fluid enters from flow-guiding mouth 14, because
Confined space can be formed at this top of inner cylinder 10, and gas can be assembled in the confined space and form the interface of oil and gas, as gas increases
Pressure increases, and the interface of oil and gas declines, and ball float 13 declines with the interface of oil and gas, and air bleeding valve 12 is opened discharges gas, after gas discharge,
Ball float 13 rises with the interface of oil and gas, and air bleeding valve 12 is closed.Fluid in inner cylinder 10 subsequently enters the filtering solid contaminants of filter cylinder 11, most
Flowed out through outlet 19 eventually.The present invention makes gas be separated with fluid by centrifugal force, and is brought into after inner cylinder 10 in inner cylinder by fluid
10 tops are assembled, and gas can be helped to be escaped from fluid in time, reach exhaust thoroughly effect, be equally applicable to oil flow compared with
Big situation.
Embodiment 2
Based on embodiment 1, inlet tube 5 is provided with entrance 4, inlet tube 5 is used to connect oil pipeline.Inlet tube 5 dips down
Oblique 17 ° of angles, can make fluid when high speed enters in cylinder 1, and eddy flow 22 is upwardly formed along inwall, be conducive to making fluid from flow-guiding mouth
14 enter inner cylinder 10.
Embodiment 3
Based on embodiment 1, sealing device is top cover 2, and the top of inner cylinder 10 is also associated with the 3rd flange 6, the top cover 2 and interior
Cylinder 10 realizes bolt connection by the 3rd flange 6.The top of inner cylinder 10 can be sealed by the flange 6 of top cover 2 and the 3rd, protected
Card gas is assembled on the top of inner cylinder 10, and bolt connection with simple structure, connects reliable, dismounting to be detachably fixed connection
The advantages of facilitating, it is convenient that exhaust apparatus is overhauled and cleared up.
Embodiment 4
Based on embodiment 1, the inwall of the lower end of inner cylinder 10 is provided with annular erecting bed 16, and the top of the filter cylinder 11 is connected with first
Flange 15, the first flange 15 is horizontally placed on annular erecting bed 16；One end that the outlet 19 is connected with filter cylinder 11 is provided with
Base 21, the lower end of filter cylinder 11 is connected with second flange 18, and the second flange 18 is placed on base 21；The first flange 15,
Annular erecting bed 16 and second flange 18 realize bolt connection by screw rod 17.By annular erecting bed 16 and base 21 by filter cylinder
11 are arranged between inner cylinder 10 and outlet 19, and are bolted so that inner cylinder 10, filter cylinder 11 and outlet 19 are connected into
Integrally, i.e., it is internally formed oil passage in gas-removing filter.Bolt connection is easy to disassemble, when need cleaning filter residue or change filter cylinder
When 11, top cover 2 is pulled down together with air bleeding valve 12, disconnect the connection of first flange 15 and screw rod 17, you can take filter cylinder 11
Go out, be easy to regular maintenance.
Embodiment 5
Based on embodiment 4, pulling apparatus 20 are additionally provided with first flange 15, pulling apparatus 20 are conducive to force, are easy to take
Go out or install filter cylinder 11.
Embodiment 6
Based on embodiment 1, inner cylinder 10 is weldingly fixed at the opening of cylinder 1.Inner cylinder 10 and cylinder 1 are connected into by welding
Integrally, welding has the advantages that intensity is high so that inner cylinder 10 can keep good stability under the constant impingement of fluid.
Embodiment 7
Based on embodiment 1 and embodiment 5, inner cylinder 10 is steady liquid pipe.Cylinder 1 is had just enter into fluid and exhaust outlet is not yet sealed
When, due to centrifugal action, fluid flow at high speed can cause exhaust outlet bleed, additionally, oil flow is too fast to influence ball float 13
Stability, so as to cause the abnormal opening and closing of air bleeding valve 12 so that exhaust is unstable, and steady liquid pipe is then conducive to making the stream of fluid
It is dynamic to tend towards stability, exhaust outlet bleed can be prevented, and ensure the reliably working of ball float 13.
Embodiment 8
Based on embodiment 1, the outer wall of cylinder 1 is provided with preceding pressure gauge 7 and rear pressure gauge 8, the preceding pressure gauge 7 and cylinder 1
Bottom connects, and rear pressure gauge 8 is connected with outlet.As the impurity in filter cylinder 11 gradually increases, with outlet inside gas-removing filter
The oil liquid pressure difference increase at place, the reading by preceding pressure gauge 7 and rear pressure gauge 8 is the stopping state that can determine whether filter cylinder 11, side
Just instrument maintenance, extends instrument service life.
Embodiment 9
Based on embodiment 1 and embodiment 8, cylinder 1 is spherical tank, and the middle part of the spherical tank is cylindrical shape, top and the bottom
It is hemispherical.Entrance 4 is arranged on cylindrical shape position, it is ensured that fluid forms the centrifugal cyclone 22 of stabilization after entering.Will be upper
Bottom is designed as hemispherical and steel loss can be greatly reduced, and this is due to spherical compared with cylindrical shape, in same volume and phase
Under with pressure, spherical surface area is minimum, and in the case of same diameter, spherical wall internal stress is minimum and uniform, bearing capacity ratio
Cylindrical shape is big 1 times, therefore spherical wall thickness only needs the half of corresponding cylindrical shape wall thickness.
Embodiment 10
Based on above-described embodiment, the bottom of cylinder 1 can install thermometer 9, be easy to real-time monitoring oil liquid temperature.
Embodiments of the invention are as described above.The present invention is not limited to the above-described embodiments, and anyone should learn
The structure change made under enlightenment of the invention, it is every with of the invention with same or like technical scheme, each fall within this
Within the protection domain of invention.
Claims (10)
1. a kind of gas-removing filter, including cylinder (1) and the entrance (4) of cylinder (1) side is arranged on, the cylinder (1) is internal
Filter cylinder (11) is provided with, filter cylinder (11) top is fixedly connected exhaust apparatus and is connected with exhaust apparatus, it is characterised in that the entrance
(4) it is tangentially-arranged along cylinder (1) side wall；
Cylinder (1) top is provided with the opening coordinated with exhaust apparatus, and the exhaust apparatus includes inner cylinder (10), the inner cylinder
(10) top is through opening and extends to cylinder (1) outside, and inner cylinder (10) top is provided with sealing device, is set on sealing device
Have and be additionally provided with exhaust outlet and the air bleeding valve (12) installed in exhaust ports, the inner cylinder (10) and air bleeding valve (12) cooperation
Ball float (13)；
Flow-guiding mouth (14) is evenly distributed with the wall of inner cylinder (10) side, horizontal plane is less than ball float where the flow-guiding mouth (14)
(13) horizontal plane where；
Cylinder (1) bottom is provided with outlet, and exit is provided with outlet (19), one end of the outlet (19) and filter cylinder
(11) bottom connection, the other end passes through and exports and extend to cylinder (1) outward.
2. a kind of gas-removing filter according to claim 1, it is characterised in that entrance (4) place is provided with inlet tube
(5)。
3. a kind of gas-removing filter according to claim 2, it is characterised in that downward-sloping 17 ° of the inlet tube (5)
Angle.
4. a kind of gas-removing filter according to claim 1, it is characterised in that the sealing device is top cover (2), inner cylinder
(10) top is connected with the 3rd flange (6), and the top cover (2) and inner cylinder (10) realize bolt connection by the 3rd flange (6).
5. a kind of gas-removing filter according to claim 1, it is characterised in that the inwall of the inner cylinder lower end is provided with annular
Erecting bed (16), filter cylinder (11) top is connected with first flange (15), and the first flange (15) is horizontally placed on annular installation
On platform (16)；One end that the outlet (19) connects with filter cylinder (11) is provided with base (21), and filter cylinder (11) lower end is connected with
Two flanges (18), the second flange (18) is placed on base (21)；The first flange (15), annular erecting bed (16) and the
Two flanges (18) realize bolt connection by screw rod (17).
6. a kind of gas-removing filter according to claim 5, it is characterised in that be additionally provided with the first flange (15) and carried
Drawing device (20).
7. a kind of gas-removing filter according to claim 1 or 5, it is characterised in that the inner cylinder (10) is weldingly fixed on
At cylinder (1) opening.
8. a kind of gas-removing filter according to claim 7, it is characterised in that the inner cylinder (10) is steady liquid pipe.
9. a kind of gas-removing filter according to claim 1, it is characterised in that cylinder (1) outer wall is provided with preceding pressure
Power table (7) and rear pressure gauge (8), the preceding pressure gauge (7) are connected with cylinder (1) bottom, and rear pressure gauge (8) is connected with outlet.
10. a kind of gas-removing filter according to claim 1 or 9, it is characterised in that the cylinder (1) is spherical tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022954.6A CN106731164A (en) | 2017-01-12 | 2017-01-12 | A kind of gas-removing filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710022954.6A CN106731164A (en) | 2017-01-12 | 2017-01-12 | A kind of gas-removing filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106731164A true CN106731164A (en) | 2017-05-31 |
Family
ID=58948074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710022954.6A Pending CN106731164A (en) | 2017-01-12 | 2017-01-12 | A kind of gas-removing filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106731164A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915625A (en) * | 2021-02-24 | 2021-06-08 | 范龙飞 | Air-removing filter |
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| RU2483211C1 (en) * | 2012-07-05 | 2013-05-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Plant for borehole separation of water-gas-oil mixture from water |
| CN105268214A (en) * | 2014-06-10 | 2016-01-27 | 横河电机株式会社 | Defoaming device |
| CN205252613U (en) * | 2015-12-29 | 2016-05-25 | 南京天梯自动化设备股份有限公司 | Plumbing installation of cooling down |
| CN206414858U (en) * | 2017-01-12 | 2017-08-18 | 郑州盈嘉石油工程技术有限公司 | A kind of gas-removing filter |
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2017
- 2017-01-12 CN CN201710022954.6A patent/CN106731164A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908594A (en) * | 2006-08-08 | 2007-02-07 | 寿焕根 | Automatic metering device for oil well three-phase flow |
| JP4688974B1 (en) * | 2010-12-13 | 2011-05-25 | 独立行政法人石油天然ガス・金属鉱物資源機構 | Batch type multiphase flow rate measuring apparatus and flow rate measuring method |
| CN202101716U (en) * | 2011-05-24 | 2012-01-04 | 涂强 | Spiral-flow type air eliminator |
| RU2483211C1 (en) * | 2012-07-05 | 2013-05-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | Plant for borehole separation of water-gas-oil mixture from water |
| CN105268214A (en) * | 2014-06-10 | 2016-01-27 | 横河电机株式会社 | Defoaming device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112915625A (en) * | 2021-02-24 | 2021-06-08 | 范龙飞 | Air-removing filter |
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