CN112224353B - Fin stabilizer apron and boats and ships - Google Patents
Fin stabilizer apron and boats and ships Download PDFInfo
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- CN112224353B CN112224353B CN202011183780.XA CN202011183780A CN112224353B CN 112224353 B CN112224353 B CN 112224353B CN 202011183780 A CN202011183780 A CN 202011183780A CN 112224353 B CN112224353 B CN 112224353B
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- cover plate
- cover
- fin stabilizer
- fin
- mounting groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
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- Ocean & Marine Engineering (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses a fin stabilizer cover plate and a ship, and belongs to the technical field of ships. The fin stabilizer cover plate comprises at least two first cover plates and at least two second cover plates, wherein each first cover plate is arranged on the ship body and can move towards or away from each other; the second cover plates are respectively and correspondingly connected to the first cover plates in a rotating mode one by one, the second cover plates can open or block the gap parts, and the first cover plates drive the corresponding second cover plates to move on the ship body; each first cover plate and each second cover plate can open or block the mounting groove. The ship comprises the fin stabilizer cover plate. According to the fin stabilizer cover plate and the ship, the navigation resistance is reduced by splicing the first cover plate in the stabilizing state, and the navigation resistance is reduced by splicing the first cover plate and the second cover plate in the withdrawing state of the fin stabilizer, so that fuel is saved.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a fin stabilizer cover plate and a ship.
Background
The ship is extremely shaken in the storm when sailing at sea, the sailing speed and safety are affected, most ships can be equipped with the stabilizer fin, but the existing installation of the stabilizer fin is that a concave part is arranged in the ship body and used as the place for installing and retracting the stabilizer fin, the concave part on the outer surface of the ship in the sailing process becomes unsmooth, the sailing resistance of the ship can be increased, the hydrodynamic performance of the ship can be affected, the resistance caused by the stabilizer fin is increased during sailing, the energy efficiency is reduced, and fuel oil consumption is reduced.
Disclosure of Invention
One object of the invention is to provide a fin stabilizer cover plate, which reduces the running resistance and saves fuel.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a fin stabilizer apron has seted up the mounting groove on the hull, and the fin stabilizer can set up in the mounting groove or stretch out the mounting groove, and the fin stabilizer includes the body and with this body coupling's connecting axle, the fin stabilizer apron includes:
the connecting shaft is arranged on the ship body in a penetrating mode, the first cover plates are arranged on the ship body in a penetrating mode, the first cover plates can move towards or away from each other, one ends of the first cover plates close to each other are provided with notch portions, the notch portions of the first cover plates form an installation channel in a surrounding mode, and the connecting shaft can penetrate through the installation channel;
the at least two second cover plates are respectively and correspondingly connected to the first cover plates in a rotating mode one by one, the second cover plates can open or block the gap parts, and the first cover plates drive the corresponding second cover plates to move on the ship body;
each first cover plate and each second cover plate can open or block the mounting groove.
Optionally, the outer part of the assembly after the first cover plates are spliced is streamlined and forms a smooth surface with an outer plate of the ship body;
the outer part of the combined part formed by splicing the first cover plate and the second cover plate is streamline and forms a smooth surface with an outer plate of the ship body.
Optionally, the fin cover plate further comprises a first drive member that drives the first cover plate to move on the hull.
Optionally, the fin cover plate further comprises a second driving member mounted on the first cover plate, and the second driving member can drive the second cover plate to rotate.
Alternatively, a second cover plate may be filled on the gap portion, and the second driving member includes:
the telescopic piece is arranged on the first cover plate and can drive the second cover plate to move towards or away from the first cover plate;
and the rotating part is used for driving the telescopic part and the second cover plate to rotate.
Optionally, the rotating member is disposed on one side of the first cover plate close to the mounting groove, and the telescopic member drives the second cover plate to one side of the first cover plate close to the mounting groove.
Optionally, a first rail assembly is arranged on the hull, a second rail assembly in sliding fit with the first rail assembly is arranged on the first cover plate, and the first cover plate can slide on the hull.
Optionally, the first rail assembly comprises a first connecting frame and a first roller arranged on the first connecting frame, the second rail assembly comprises a second connecting frame and a second roller arranged on the second connecting frame, and the first roller and the second roller are in meshed connection.
Optionally, an anode protection block is disposed on the first cover plate.
Another object of the present invention is to provide a ship, which has roll reduction and energy saving, reduces energy consumption of the ship, improves endurance, and improves safety of ship operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a ship comprises the fin stabilizer cover plate.
The invention has the beneficial effects that:
according to the fin stabilizer cover plate, in an initial state, the fin stabilizer is folded in the mounting groove of a ship body, the first cover plate is spliced, the second cover plate is plugged on the mounting channel, and the first cover plate and the second cover plate plug the mounting groove, so that the navigation resistance is reduced, and the fuel consumption is reduced; when the ship meets stormy waves, the connecting shaft is sleeved with the mounting channel formed by the notch parts of the first cover plates, and the mounting grooves are plugged by the first cover plates, so that the navigation resistance is reduced, and fuel is saved.
According to the ship provided by the invention, the anti-rolling fins are used for anti-rolling, and the anti-rolling fin cover plate is used, so that the ship has the advantages of anti-rolling and energy saving, the energy consumption of the ship is reduced, the endurance capacity is improved, and the safety of ship operation is improved.
Drawings
FIG. 1 is a schematic view of a configuration of a fin stabilizer extending outside a hull according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a fin stabilizer according to an embodiment of the present invention;
fig. 3 is a partial structural schematic view of a fin stabilizer stowed in a ship hull according to an embodiment of the present invention;
fig. 4 is a partial structural schematic view of a fin stabilizer provided in an embodiment of the present invention during retraction or extension of a hull;
FIG. 5 is a schematic view of a partial configuration of a fin extending outside a hull according to an embodiment of the present invention;
fig. 6 is an enlarged view of fig. 1 at a.
In the figure:
100-a hull; 101-mounting grooves; 200-stabilizer fins; 201-a body; 202-a connecting shaft;
1-a first cover plate; 11-a notch portion; 12-a second track assembly; 121-a second connecting frame; 122-a second roller;
2-a second cover plate;
3-a first driving member;
4-a second driving member; 41-a rotating member; 42-a telescoping member;
5-a first track assembly; 51-a first link frame; 52-first roller;
6-anode protection block.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; 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 in specific cases to those skilled in the art.
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 embodiment provides a ship, as shown in fig. 1, which includes a hull 100 and a fin stabilizer 200, wherein the hull 100 is provided with an installation groove 101, and the fin stabilizer 200 can be arranged in the installation groove 101 or extend out of the installation groove 101. When the ship sails and encounters storm and shake, the fin stabilizer 200 extends out of the mounting groove 101, sailing stability is improved, and when the ship sails and encounters storm and shake in an initial state or no storm and shake, the fin stabilizer 200 is retracted into the mounting groove 101, and sailing resistance is reduced. However, whether the fin 200 is extended or retracted into the mounting groove 101, the provision of the mounting groove 101 increases the sailing resistance, affects hydrodynamic performance, increases the resistance of the fin 200, and consumes fuel.
In order to solve the above problems, the present embodiment provides a fin stabilizer cover plate including at least two first cover plates 1 and at least two second cover plates 2, specifically, as shown in fig. 2, a fin stabilizer 200 includes a body 201 and a connecting shaft 202 connected to the body 201; as shown in fig. 3 to 5, each first cover plate 1 is disposed on the hull 100, each first cover plate 1 can move towards or away from each other, the first cover plates 1 are provided with a notch portion 11 at one end close to each other, the notch portions 11 of each first cover plate 1 enclose an installation channel, and the connection shaft 202 can be inserted into the installation channel; the second cover plates 2 are respectively and correspondingly connected to the first cover plates 1 in a one-to-one rotating mode, the second cover plates 2 can open or block the gap parts 11, and the first cover plates 1 drive the corresponding second cover plates 2 to move on the ship body 100; each of the first cover plates 1 and each of the second cover plates 2 can open or close the mounting groove 101.
As shown in fig. 3, in an initial state, the fin stabilizer 200 is stowed in the mounting groove 101 of the hull 100, at this time, the first cover plate 1 is spliced, the second cover plate 2 is plugged on the mounting channel, and the first cover plate 1 and the second cover plate 2 plug the mounting groove 101, so that the navigation resistance is reduced, and the fuel consumption is reduced; when a ship encounters stormy waves, in the process that the fin stabilizer 200 extends out of the mounting groove 101, as shown in fig. 4, first, the first cover plates 1 move away from each other, and meanwhile, the second cover plate 2 moves along with the first cover plate 1, so that the notch of the mounting groove 101 is opened, and the fin stabilizer 200 extends out of the mounting groove 101; then, the second cover 2 rotates to open the notch portion 11; as shown in fig. 5, finally, the first covers 1 are moved toward each other, the respective notch portions 11 form mounting passages to surround the connecting shaft 202, and the respective first covers 1 block the mounting grooves 101, thereby reducing the navigation resistance and saving the fuel.
When the wind wave stops or the fin 200 is not needed to be used, as shown in fig. 4, the first cover plates 1 move away from each other, the notches of the mounting grooves 101 are opened, and the fin 200 retracts into the mounting grooves 101; then, the second cover plate 2 rotates to close the notch part 11; as shown in fig. 3, the first cover plate 1 moves towards each other, and the first cover plate 1 and the second cover plate 2 are spliced together to block the notch of the mounting groove 101, and then return to the initial state. Alternatively, the length of the rail connection frame is not less than that of the body 201, and when the respective first cover plates 1 are separated, the body 201 can enter or extend out of the installation groove 101.
Optionally, the outer part of the combined part of the first cover plates 1 is streamlined and forms a smooth surface with the outer plate of the ship body 100, so that the sailing resistance of the ship body 100 after the fin stabilizer 200 extends out of the mounting groove 101 is further reduced; alternatively, the shape and size of the notch portion 11 may be set according to the outer shape and outer diameter size of the connecting shaft 202, so that the connecting shaft 202 is fitted to the installation passage, the gap between the connecting shaft 202 and the installation passage is reduced, and the sailing resistance is further reduced. Optionally, the outer part of the assembly formed by the first cover plate 1 and the second cover plate 2 is streamlined and forms a smooth surface with the outer plate of the hull 100, so that the sailing resistance of the hull 100 when the fin 200 is folded in the mounting groove 101 is further reduced.
As shown in fig. 6, optionally, a first rail assembly 5 is disposed on the hull 100, a second rail assembly 12 slidably engaged with the first rail assembly 5 is disposed on the first cover plate 1, and the first cover plate 1 can slide on the hull 100 along the first rail assembly 5, so as to improve the sliding efficiency of the first cover plate 1 and prevent the first cover plate 1 from sliding and deviating on the hull 100. In this embodiment, the first track assembly 5 includes a first connecting frame 51 and a first roller 52 disposed on the first connecting frame 51, the second track assembly 12 includes a second connecting frame 121 and a second roller 122 disposed on the second connecting frame 121, and the first roller 52 and the second roller 122 are engaged and connected, so that the smoothness of the first cover plate 1 moving on the hull 100 is improved, vibration is prevented, and the water tightness of the hull 100 is improved.
As shown in fig. 6, optionally, the fin stabilizer cover plate further includes a first driving member 3, and the first driving member 3 drives the first cover plate 1 to move on the hull 100, so that the first cover plate 1 automatically moves to block or open the mounting groove 101, thereby improving the convenience of use; specifically, the first driving member 3 may include a motor, and the motor drives the first cover plate 1 to move; in this embodiment, the first driving member 3 further includes a control valve for controlling the motor, the hull 100 is provided with a monitoring module, the monitoring module is configured to monitor an operating environment of the hull 100, when it is detected that the fins 200 need to be stabilized by wind and waves, the monitoring module sends an instruction to the control valve, the control valve controls the motor to rotate, so that the first cover plate 1 moves, and the mounting groove 101 is opened, so that the fins 200 extend out of the mounting groove 101; specifically, the forward and reverse rotation of the motor can be set according to the specific requirement for opening the first cover plate 1, and is not described again; through the combined action of the monitoring module, the control valve and the motor, the extending and retracting of the fin stabilizer 200 are automatically controlled, and the installation channel and the installation groove 101 are automatically opened or closed, so that the intelligent control is realized, and the reliability and the convenience are improved; resistance caused by the fin stabilizer 200 is reduced to the minimum, energy conservation and intelligent retraction and extension are combined, and the income brought to the ship is immeasurable; the specific control and operation details thereof can refer to the prior art and are not described in detail.
In the present embodiment, as shown in fig. 6, the fin cover further includes a second driving member 4 mounted on the first cover 1, and the second driving member 4 can drive the second cover 2 to rotate, so that each second cover 2 can automatically block or open the mounting channel. In order to improve the smoothness of the outer plate of the ship body 100 after the second cover plate 2 is spliced with the first cover plate 1, the second cover plate 2 can be filled on the gap part 11, so that the external streamline shape of the assembly after the first cover plate 1 and the second cover plate 2 are spliced is improved, and the running resistance of the ship body 100 is further reduced; in order to avoid improving the operation reliability and avoiding the structural interference between the second cover plate 2 and the first cover plate 1 during rotation, the second driving member 4 comprises a telescopic member 42 and a rotating member 41, the telescopic member 42 is arranged on the first cover plate 1, and the telescopic member 42 can drive the second cover plate 2 to move towards or away from the first cover plate 1; the rotating piece 41 is used for driving the telescopic piece 42 and the second cover plate 2 to rotate; when the second cover 2 opens the notch 11, the second cover 2 is separated from the first cover 1 by the expansion member 42, and when the two are not on the same surface, the rotation member 41 drives the second cover 2 to rotate, so as to open the notch 11.
Further optionally, the rotating part 41 is disposed on one side of the first cover plate 1 close to the mounting groove 101, the telescopic part 42 drives the second cover plate 2 to one side of the first cover plate 1 close to the mounting groove 101, when the second cover plate 2 is separated from the first cover plate 1 through the telescopic part 42, or when the second cover plate 2 rotates under the action of the rotating part 41, the second cover plate 2 is always disposed between the first cover plate 1 and the mounting groove 101, and the second driving part 4 and the second cover plate 2 are prevented from being disposed outside the first cover plate 1, so that the operation resistance is reduced. Specifically, the telescopic member 42 may be an air cylinder, the air cylinder is rotatably connected to the first cover plate 1, the second cover plate 2 is connected to the movable end of the air cylinder, and the movable end can drive the second cover plate 2 to stretch and retract; the rotating member 41 drives the cylinder to rotate, thereby rotating the second cover plate 2; optionally, the rotating member 41 is a torsion steering engine.
Optionally, the first cover plate 1 is provided with an anode protection block 6 to prevent seawater from corroding the first cover plate 1, so that the service life of the first cover plate 1 is prolonged; specifically, the anode protection block 6 is disposed at a side of the first cover plate 1 adjacent to the installation groove 101. Optionally, the anode protection block 6 is a zinc block.
In this embodiment, as shown in fig. 3 to 6, the fin stabilizer cover includes four first cover plates 1 and four second cover plates 2, four corners of the four first cover plates 1 close to each other are all provided with notch portions 11, the shape and size of the second cover plates 2 are the same as the notch portions 11, so that the second cover plates 2 can fill the notch portions 11, and the four torsion rudders can drive the four second cover plates 2 to rotate, so as to open or close the notch portions 11; the four motors can drive the four first cover plates 1 to open or close the mounting grooves 101 along the extending direction of the first track assembly 5.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a fin stabilizer apron has seted up mounting groove (101) on hull (100), fin stabilizer (200) can set up in mounting groove (101) or stretch out mounting groove (101), fin stabilizer (200) include body (201) and with connecting axle (202) that body (201) are connected, its characterized in that, fin stabilizer apron includes:
at least two first cover plates (1) are arranged on the ship body (100), each first cover plate (1) can move towards or away from each other, one ends of the first cover plates (1) close to each other are provided with notch parts (11), the notch parts (11) of each first cover plate (1) enclose an installation channel, and the connecting shaft (202) can be arranged on the installation channel in a penetrating mode;
the at least two second cover plates (2) are respectively and correspondingly connected to the first cover plates (1) in a rotating mode, the second cover plates (2) can open or block the gap parts (11), and the first cover plates (1) drive the corresponding second cover plates (2) to move on the ship body (100);
each first cover plate (1) and each second cover plate (2) can open or close the mounting groove (101);
the telescopic piece (42) is arranged on the first cover plate (1), and the telescopic piece (42) can drive the second cover plate (2) to move towards or away from the first cover plate (1).
2. Fin stabilizer plate according to claim 1,
the outer part of the combined part spliced by the first cover plates (1) is streamline and forms a smooth surface with an outer plate of the ship body (100);
the outer part of the combined part formed by splicing the first cover plate (1) and the second cover plate (2) is streamline and forms a smooth surface with an outer plate of the ship body (100).
3. Fin stabilizer plate according to claim 1 or 2, characterized in that it further comprises a first drive (3), which first drive (3) drives the first cover plate (1) in movement over the hull (100).
4. Fin cover plate according to claim 1 or 2, characterized in that it further comprises a second drive (4) mounted on the first cover plate (1), which second drive (4) can drive the second cover plate (2) in rotation.
5. Fin stabilizer plate according to claim 4, characterized in that the second plate (2) can be filled on the notch (11), the second drive element (4) comprising:
and the rotating piece (41) is used for driving the telescopic piece (42) and the second cover plate (2) to rotate.
6. Fin stabilizer cover according to claim 5, characterized in that the rotation element (41) is arranged on the side of the first cover (1) close to the mounting groove (101), the telescopic element (42) driving the second cover (2) to the side of the first cover (1) close to the mounting groove (101).
7. Fin stabilizer cover according to claim 1 or 2, characterized in that a first rail assembly (5) is arranged on the hull (100), that a second rail assembly (12) is arranged on the first cover (1) in sliding engagement with the first rail assembly (5), and that the first cover (1) is slidable on the hull (100).
8. Fin stabilizer cover plate according to claim 7, characterized in that the first rail assembly (5) comprises a first connection frame (51) and a first roller (52) arranged on the first connection frame (51), and the second rail assembly (12) comprises a second connection frame (121) and a second roller (122) arranged on the second connection frame (121), the first roller (52) and the second roller (122) being in a meshing connection.
9. Fin stabilizer cover plate according to claim 1 or 2, characterized in that an anode protection block (6) is provided on the first cover plate (1).
10. A ship, characterized in that it comprises a fin panel according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183780.XA CN112224353B (en) | 2020-10-29 | 2020-10-29 | Fin stabilizer apron and boats and ships |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183780.XA CN112224353B (en) | 2020-10-29 | 2020-10-29 | Fin stabilizer apron and boats and ships |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112224353A CN112224353A (en) | 2021-01-15 |
| CN112224353B true CN112224353B (en) | 2021-12-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011183780.XA Active CN112224353B (en) | 2020-10-29 | 2020-10-29 | Fin stabilizer apron and boats and ships |
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| Country | Link |
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| CN (1) | CN112224353B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011005312A1 (en) * | 2011-03-09 | 2012-09-13 | Blohm + Voss Industries Gmbh | Fin device for stabilizing water vehicle, particularly ship, has main fin element driven by drive shaft, where depth of housing in retraction direction is smaller than common maximum length of main and tail fin elements |
| CN204236747U (en) * | 2014-10-30 | 2015-04-01 | 江苏新韩通船舶重工有限公司 | A kind of telescopic anti-ship waved |
| JP2016516635A (en) * | 2013-04-26 | 2016-06-09 | フィンカンティエリ ソチエタ ペル アツィオニ | Stabilization device for a ship such as a ship or a ship, a ship equipped with such a device, and a method for driving the stabilization apparatus |
| CN107074331A (en) * | 2014-10-24 | 2017-08-18 | 斯凯孚海运有限公司 | Fin stabilizer, cap member and ship |
| CN210793567U (en) * | 2019-07-31 | 2020-06-19 | 武汉理工大学 | Marine anti-rolling hydraulic arm throwing device |
| JP2020128202A (en) * | 2019-02-06 | 2020-08-27 | エス・ケイ・エフ マリーン ゲゼルシャフト ミット ベシュレンクテル ハフツングＳＫＦ Ｍａｒｉｎｅ ＧｍｂＨ | Active stabilization device and method |
-
2020
- 2020-10-29 CN CN202011183780.XA patent/CN112224353B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011005312A1 (en) * | 2011-03-09 | 2012-09-13 | Blohm + Voss Industries Gmbh | Fin device for stabilizing water vehicle, particularly ship, has main fin element driven by drive shaft, where depth of housing in retraction direction is smaller than common maximum length of main and tail fin elements |
| JP2016516635A (en) * | 2013-04-26 | 2016-06-09 | フィンカンティエリ ソチエタ ペル アツィオニ | Stabilization device for a ship such as a ship or a ship, a ship equipped with such a device, and a method for driving the stabilization apparatus |
| CN107074331A (en) * | 2014-10-24 | 2017-08-18 | 斯凯孚海运有限公司 | Fin stabilizer, cap member and ship |
| CN204236747U (en) * | 2014-10-30 | 2015-04-01 | 江苏新韩通船舶重工有限公司 | A kind of telescopic anti-ship waved |
| JP2020128202A (en) * | 2019-02-06 | 2020-08-27 | エス・ケイ・エフ マリーン ゲゼルシャフト ミット ベシュレンクテル ハフツングＳＫＦ Ｍａｒｉｎｅ ＧｍｂＨ | Active stabilization device and method |
| CN210793567U (en) * | 2019-07-31 | 2020-06-19 | 武汉理工大学 | Marine anti-rolling hydraulic arm throwing device |
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| Publication number | Publication date |
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| CN112224353A (en) | 2021-01-15 |
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