CN110645237B - Pipeline guiding device - Google Patents
Pipeline guiding device Download PDFInfo
- Publication number
- CN110645237B CN110645237B CN201910823421.7A CN201910823421A CN110645237B CN 110645237 B CN110645237 B CN 110645237B CN 201910823421 A CN201910823421 A CN 201910823421A CN 110645237 B CN110645237 B CN 110645237B
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- Prior art keywords
- pipeline
- movable seat
- torsion
- deflector
- driving
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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
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- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 abstract description 17
- 230000008859 change Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 14
- 238000005457 optimization Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/02—Influencing flow of fluids in pipes or conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air-Flow Control Members (AREA)
Abstract
The invention provides a pipeline flow guide device, and relates to the technical field of pipeline conveying. Wherein, this kind of pipeline guiding device contains: the pipeline is internally provided with a pipe cavity, a torsion mechanism and a driving mechanism. The torsion mechanism comprises a first movable seat which is rotatably arranged in the tube cavity, a second movable seat which is arranged in the tube cavity and can move up and down, and a torsion assembly which is internally provided with a gas passing channel communicated with the tube cavity, wherein one end of the torsion assembly is connected to the first movable seat, and the other end of the torsion assembly is connected to the second movable seat; the driving mechanism is used for driving the first movable seat to rotate relative to the pipeline; the driving mechanism can drive the first movable seat to rotate and twist one end of the twisting assembly, so that the other end of the twisting assembly drives the second movable seat to move towards the direction close to the first movable seat, and the air passing caliber of the air passing channel is reduced. The invention can realize smooth adjustment of the cross-sectional area of the pipeline under the condition of not changing the movement direction of the fluid in the pipeline so as to change the flow velocity.
Description
Technical Field
The invention relates to the field of pipeline conveying, in particular to a pipeline flow guide device.
Background
Currently, the load of a boiler or a sintering machine varies according to external conditions during operation. When the high-load operation is carried out, the gas flow velocity at the bottom of the dry desulfurization absorption tower is higher, and dust can be blown away to meet the requirement of no dust falling; and when the low-load operation, the gas velocity of bottom of the absorption tower is lower, and the gas needs to be supplemented from the circulating flue to the bottom of the absorption tower, so that the gas at the bottom of the absorption tower can be ensured to keep higher velocity to meet the requirement of not falling ash, but the gas is supplemented from the circulating flue to the bottom of the absorption tower, and a large amount of energy is consumed. Therefore, the energy consumed for keeping the gas at the bottom of the tower at a higher flow rate is reduced, the method has good practical significance, and not only can save cost for enterprises, but also can save energy for society. In view of the above, the inventors of the present invention have made a study of the prior art and then have made the present application.
Disclosure of Invention
The invention provides a pipeline flow guide device, aiming at solving the problem that a large amount of energy is consumed when gas at the bottom of a dry desulfurization absorption tower keeps high flow speed in low-load operation.
In order to solve the above technical problem, the present invention provides a pipeline flow guiding device, comprising:
a conduit having a lumen disposed therein;
the torsion mechanism comprises a first movable seat which is rotatably arranged in the tube cavity, a second movable seat which is arranged in the tube cavity and can move up and down, and a torsion assembly which is internally provided with an air passing channel communicated with the tube cavity, wherein one end of the torsion assembly is connected to the first movable seat, and the other end of the torsion assembly is connected to the second movable seat;
the driving mechanism is used for driving the first movable seat to rotate relative to the pipeline;
the driving mechanism can drive the first movable seat to rotate and twist one end of the twisting assembly, so that the other end of the twisting assembly drives the second movable seat to move towards the direction close to the first movable seat, and the air passing caliber of the air passing channel is reduced.
As a further optimization, the torsion assembly comprises a plurality of flexible sheets, and the flexible sheets are spliced to form a tubular geometric body with the air passing channel.
As a further optimization, the flexible sheet is a square sheet-shaped steel sheet, and two ends of the flexible sheet are respectively connected to the first movable seat and the second movable seat.
As a further optimization, the driving mechanism comprises driving pieces respectively hinged to the pipeline and the first movable seat.
Preferably, the driving member is an electric push rod, or a pneumatic cylinder, or a hydraulic rod cylinder.
As a further optimization, the pipeline diversion device comprises a connection mechanism, and the connection mechanism comprises elastic connection pieces respectively hinged to the pipeline and the second movable seat.
As a further optimization, the elastic connecting piece is a spring.
As a further optimization, the pipeline is provided with a first groove along the circumferential direction of the pipeline, and the first movable seat is provided with a first protrusion matched with the first groove.
As a further optimization, the pipeline is provided with a second groove along the axis direction of the pipeline, and the second movable seat is provided with two protrusions matched with the second groove.
As a further optimization, the pipeline diversion device comprises a control mechanism; the driving piece is electrically connected with the control mechanism.
By adopting the technical scheme, the invention can obtain the following technical effects: the flow rate of the fluid at the deflector can be maintained within a desired range with only a small amount of energy being consumed.
When the machine runs at a high load, the fluid in the pipeline has a high flow rate, the fluid in the air passing channel also has a high flow rate, the flexible sheet is in a natural state of straightening, and the air passing caliber is in a maximum state.
When the machine operates at a low load, the flow velocity of fluid in the pipeline is reduced, the driving mechanism drives the first movable seat to rotate, one end of the torsion assembly is twisted, the other end of the torsion assembly drives the second movable seat to approach the first movable seat, the air passing aperture is reduced in the process, and the fluid in the air passing channel keeps a high flow velocity.
The pipeline flow guide device adopts a twisting mode to reduce the air passing caliber, the air passing channel is changed from large to small in a gradual change mode, the flow direction of fluid can not be changed, stepless regulation of the caliber can be realized, the resistance encountered by fluid in the pipeline in the advancing process is smaller, the energy loss of the fluid in the process of passing through the pipeline flow guide device is greatly reduced, the energy required by improving the flow speed is greatly reduced, and the pipeline flow guide device has good practical significance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic cross-sectional view of a pipeline diversion apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of a torsion mechanism according to an embodiment of the present invention;
FIG. 3 is a schematic view of a torsion assembly according to an embodiment of the present invention;
FIG. 4 is a schematic view of a duct diversion apparatus according to an embodiment of the present invention from a first perspective
FIG. 5 is a schematic view of a duct guiding device according to an embodiment of the present invention from a second perspective
FIG. 6 is a schematic cross-sectional view of a joint between a first movable seat and a pipeline according to an embodiment of the present invention
Fig. 7 is a schematic cross-sectional structural diagram of a joint between the second movable seat and the pipeline according to an embodiment of the present invention, where the structural diagram is marked as follows: 1-a torsion mechanism; 2-a drive mechanism; 3-a connection mechanism; 4-a first movable seat; 5-a torsion assembly; 6-a second movable seat; 7-a gas passage; 8-a flexible sheet; 9-a driving member; 10-an elastic connector; 11-a first groove; 12-a first projection; 13-a second groove; 14-a second protrusion; 15-a pipeline; 16-lumen.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
as shown in fig. 1, in this embodiment, the duct guiding device includes:
a conduit 15 having a lumen 16 disposed therein;
a torsion mechanism 1 which comprises a first movable seat 4 rotatably arranged in the tube cavity 16, a second movable seat 6 which can move up and down and is arranged in the tube cavity 16, and a torsion assembly 5 which is internally provided with an air passing channel 7 communicated with the tube cavity 16, wherein one end of the torsion assembly 5 is connected with the first movable seat 4, and the other end is connected with the second movable seat 6;
a driving mechanism 2 for driving the first movable seat 4 to rotate relative to the pipeline 15;
as shown in fig. 1, in this embodiment, specifically, the driving mechanism 2 drives the first movable seat 4 to rotate and drives one end of the torsion assembly 5 to twist, and the other end of the torsion assembly 5 drives the second movable seat 6 to approach the first movable seat 4, so as to reduce the air passing aperture of the air passing channel 7. The air passing aperture is reduced by adopting a twisting mode, the air passing channel 7 is changed in a gradual change mode from large to small, the flow direction of fluid can not be changed, stepless adjustment of the aperture can be realized, the resistance encountered by the fluid in the pipeline 15 in the advancing process is smaller, the energy loss of the fluid when the fluid passes through the pipeline flow guide device is greatly reduced, the energy required by improving the flow velocity is greatly reduced, and the air passing channel has good practical significance.
In this embodiment, the names of the air passage 7, the air aperture, and the like are adopted, which does not mean that the present invention can only guide the gaseous fluid, and the pipeline guide device of the present invention is also suitable for guiding the liquid fluid.
As shown in fig. 2 and 3, in the present embodiment, the torsion assembly 5 includes a plurality of flexible sheets 8, and the plurality of flexible sheets 8 are spliced to form a tubular geometric body having the air passage 7. Specifically, the plurality of flexible sheets 8 are spliced, the tubular arrangement of the plurality of flexible sheets 8 is changed into the single-sheet hyperboloid arrangement in the twisting process, the overall deformation is more regular and gentle, the irregular deformation cannot occur, and the stress concentration cannot occur; the gas passing channel 7 is in a funnel shape which is gradually changed from large to small, so that the resistance applied to the fluid in the movement process is reduced in the process of improving the flow speed; greatly prolonging the service life and the use effect of the torsion assembly 5 and having good practical significance.
As shown in fig. 3, in the present embodiment, the flexible sheet 8 is a square sheet-shaped steel sheet, and both ends of the flexible sheet 8 are respectively connected to the first movable seat 4 and the second movable seat 6. Specifically, two ends of the flexible sheet 8 are respectively hinged to the first movable seat 4 and the second movable seat 6, and the flexible sheet 8 is connected in a hinged mode, so that the deformation of the hinged part in the twisting process is more regular and gentle, irregular deformation cannot occur, stress distribution is more uniform, and the service life of the twisting assembly 5 is greatly prolonged; as shown in the figure 3, in the embodiment, the flexible sheets 8 are spliced in a superposition mode by adopting square sheet-shaped steel sheets, the surfaces of the flexible sheets 8 are in mutual contact, the surfaces of the flexible sheets 8 can be mutually dedusted in the twisting process, manual cleaning and maintenance are not needed, and the method has good practical significance. In another embodiment, a plurality of flexible sheets 8 are connected by flexible materials to provide better sealing performance of the torsion assembly 5, and all fluid passes through the air passage 7, so that the pressure is higher and the flow speed is higher.
As shown in fig. 4, in the present embodiment, the driving mechanism 2 comprises a driving member 9 hinged to the pipe 15 and the first movable seat 4, respectively. Specifically, the connection is performed in a hinged manner, and in the process that the driving mechanism 2 drives the first movable seat 4 to rotate, the driving mechanism 2 can automatically adjust the direction to better drive the first movable part to rotate; the closer the hinge point of the driving mechanism 2 and the pipeline 15 is to the hinge point of the driving mechanism 2 and the first movable seat 4, the larger the driving force is, and the maximum or minimum air passing aperture is reached when the connecting line of the two hinge points is intersected with the axis of the pipeline 15.
In the present embodiment, the driving member 9 is an electric push rod, or a pneumatic cylinder, or a hydraulic rod cylinder, as shown in fig. 4. Specifically, electric push rod, pneumatic cylinder, hydraulic stem jar belong to conventional purchase spare, low cost, and the technology is mature, and is not fragile, easily change.
In the present embodiment, as shown in fig. 5, the pipeline diversion device comprises a connection mechanism 3, and the connection mechanism 3 comprises elastic connection members respectively hinged to the pipeline 15 and the second movable seat 6. Specifically, the elastic connecting piece stores energy in the process of increasing the driving force and releases energy in the process of reducing the driving force so as to complement the driving force, the twisting efficiency is improved, the loss of the driving mechanism 2 is reduced, the service life of the driving piece 9 is greatly prolonged, and the elastic connecting piece has good practical significance; the connection is carried out in a hinged mode, so that the elastic connecting piece 10 has an adjusting space in the process that the second movable seat 6 is close to the first movable seat 4, and the condition of stress concentration cannot be generated.
As shown in fig. 5, in the present embodiment, the elastic connection member 10 is a spring. Specifically, adopt spring coupling, can let elastic connecting piece 10 have better adjustment space at the process that second sliding seat 6 is close to first sliding seat 4, can not produce the condition of stress concentration, and the spring belongs to conventional purchase piece, and the specification is complete, be convenient for purchase, low cost, mature technique, not fragile, easily change.
As shown in fig. 6, in the present embodiment, the pipe 15 is provided with a first groove 11 along the circumferential direction of the pipe 15, and the first movable seat 4 is provided with a first protrusion 12 adapted to the first groove 11. Specifically, the first protrusion 12 slides on the first groove 11, which is to play a role in guiding the rotation of the first movable seat 4 and limit the vertical movement of the first movable seat 4. In another embodiment, the first protrusion 12 is disposed on the duct 15, and the first groove 11 is disposed on the first movable seat 4.
As shown in fig. 7, in the present embodiment, the pipe 15 is provided with a second groove 13 along the axial direction of the pipe 15, and the second movable seat 6 is provided with a second protrusion 14 adapted to the second groove 13. Specifically, the second protrusion 14 slides on the second groove 13, which is to play a role in guiding the second movable seat 6 close to the first movable seat 4 and also to limit the rotation of the second movable seat 6. In another embodiment, the second protrusion 14 is disposed on the duct 15, and the second groove 13 is disposed on the second movable seat 6.
As shown in fig. 1-7, in the present embodiment, the ducted diversion apparatus includes a control mechanism; the driver 9 is electrically connected to the control mechanism. Specifically, the driving member 9 is an electric push rod, or a pneumatic cylinder, or a hydraulic rod cylinder, which cannot be directly controlled by a human, and a control mechanism for controlling the driving member 9 needs to be configured, which belongs to the conventional art and is not described herein again.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pipeline deflector, comprising:
a conduit (15) having a lumen (16) disposed therein;
the torsion mechanism (1) comprises a first movable seat (4) which is rotatably arranged in the tube cavity (16), a second movable seat (6) which is arranged in the tube cavity (16) and can move up and down, and a torsion assembly (5) which is internally provided with a gas passing channel (7) communicated with the tube cavity (16), wherein one end of the torsion assembly (5) is connected to the first movable seat (4), and the other end of the torsion assembly is connected to the second movable seat (6);
a driving mechanism (2) for driving the first movable seat (4) to rotate relative to the pipeline (15);
the driving mechanism (2) can drive the first movable seat (4) to rotate and twist one end of the twisting component (5), so that the other end of the twisting component (5) drives the second movable seat (6) to move towards the direction close to the first movable seat (4), and the air passing caliber of the air passing channel (7) is reduced.
2. Pipeline deflector according to claim 1, characterised in that the torsion assembly (5) comprises a plurality of flexible sheets (8), the flexible sheets (8) being spliced to enclose a tubular geometry with the air passage channel (7).
3. A pipeline deflector as claimed in claim 2, in which the deflector comprises a plurality of fins,The flexible sheet (8) is a square sheet-shaped steel sheet, and two ends of the flexible sheet (8) are respectively connected to the first movable seat (4) and the second movable seat (6).
4. A pipeline deflector according to claim 1, characterised in that the actuating mechanism (2) comprises actuating members (9) hinged to the pipeline (15) and to the first movable seat (4), respectively.
5. Pipeline guide device according to claim 4, characterized in that the drive element (9) is an electric push rod, or a pneumatic cylinder, or a hydraulic rod cylinder.
6. A pipeline deflector according to claim 1, characterised in that it comprises a connection mechanism (3), the connection mechanism (3) comprising elastic connecting pieces (10) hinged to the pipeline (15) and to the second movable seat (6), respectively.
7. Pipeline guide device according to claim 6, characterised in that the elastic connection (10) is a spring.
8. The pipeline diversion device according to claim 1, wherein said pipeline (15) is provided with a first groove (11) along the circumference direction of the pipeline (15), and said first movable seat (4) is provided with a first protrusion (12) adapted to said first groove (11).
9. A pipeline deflector according to claim 1, characterised in that the pipeline (15) is provided with a second groove (13) in the axial direction of the pipeline (15), and the second movable seat (6) is provided with a second projection (14) adapted to the second groove (13).
10. A pipeline deflector according to claim 4 or 5, comprising control means; the driving piece (9) is electrically connected with the control mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823421.7A CN110645237B (en) | 2019-09-02 | 2019-09-02 | Pipeline guiding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823421.7A CN110645237B (en) | 2019-09-02 | 2019-09-02 | Pipeline guiding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110645237A CN110645237A (en) | 2020-01-03 |
| CN110645237B true CN110645237B (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910823421.7A Expired - Fee Related CN110645237B (en) | 2019-09-02 | 2019-09-02 | Pipeline guiding device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110645237B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487064A (en) * | 1983-05-13 | 1984-12-11 | The Singer Company | Internal gate rotary vane fluid meter with controlled rotor vane inner diameter |
| CN1312135A (en) * | 2000-03-07 | 2001-09-12 | 松下电器产业株式会社 | Liquid discharging apparatus and liquid discharging method |
| CN204113818U (en) * | 2014-09-19 | 2015-01-21 | 重庆市鸿嘉洪节能科技有限公司 | Eddy current accelerates pipeline |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2382776A (en) * | 2001-11-21 | 2003-06-11 | Tayside Flow Technologies Ltd | Helix shaped insert for flow modification in a duct or stent |
| US6827327B2 (en) * | 2002-07-02 | 2004-12-07 | Cosmo Instruments Co., Ltd. | Flow resistance setting nozzle |
| GB0907513D0 (en) * | 2009-05-01 | 2009-06-10 | Rolls Royce Plc | A flow modulating device |
| KR101059086B1 (en) * | 2011-03-18 | 2011-08-24 | (주)대주기계 | A variable throat device for the air compressor |
| DE102012205262A1 (en) * | 2012-03-30 | 2013-10-02 | Ford Global Technologies, Llc | Variable flow resistance |
| US20180266416A1 (en) * | 2017-03-20 | 2018-09-20 | Recyca-Pipe Of America L.L.C. | Grouting material delivery and application system |
-
2019
- 2019-09-02 CN CN201910823421.7A patent/CN110645237B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487064A (en) * | 1983-05-13 | 1984-12-11 | The Singer Company | Internal gate rotary vane fluid meter with controlled rotor vane inner diameter |
| CN1312135A (en) * | 2000-03-07 | 2001-09-12 | 松下电器产业株式会社 | Liquid discharging apparatus and liquid discharging method |
| CN204113818U (en) * | 2014-09-19 | 2015-01-21 | 重庆市鸿嘉洪节能科技有限公司 | Eddy current accelerates pipeline |
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| CN110645237A (en) | 2020-01-03 |
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Granted publication date: 20220114 |