CN109468917A - Screw material-distributing system and paver - Google Patents
Screw material-distributing system and paver Download PDFInfo
- Publication number
- CN109468917A CN109468917A CN201910015927.5A CN201910015927A CN109468917A CN 109468917 A CN109468917 A CN 109468917A CN 201910015927 A CN201910015927 A CN 201910015927A CN 109468917 A CN109468917 A CN 109468917A
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- CN
- China
- Prior art keywords
- component
- distributing system
- screw
- sunpender
- material toggling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/187—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect solely for spreading-out or striking-off deposited mixtures, e.g. spread-out screws, strike-off boards
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Machines (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention discloses a kind of screw material-distributing system and pavers, are related to technical field of road construction, to optimize the structure of screw material-distributing system.The screw material-distributing system includes material toggling component, ironing component and sunpender.Material toggling component is for stirring material.It presses component to be set near material toggling component, is configured to the material after ironing material toggling component is stirred.Sunpender is rotatably connected with material toggling component 1, and sunpender is used to support material toggling component, and sunpender is configured at least one of them and is gradually reduced along material moving direction cross-sectional area.Above-mentioned technical proposal is first thrown on backgauge component after material is transferred to from material toggling component, is then fallen after the collision of backgauge component.In collision process, the movement of material is miscellaneous sequence without chapter, and due to inertia, the more miscellaneous sequence of the movement of big material is without chapter, so the state of random distribution is presented in the big material fallen, therefore solves the problems, such as the road surface depth isolation at ironing component.
Description
Technical field
The present invention relates to technical field of road construction, and in particular to a kind of screw material-distributing system and paver.
Background technique
Paver is a kind of road surface construction machinery for roadbase and surface layer paving operation, and it is public to be widely used in high speed
The construction that paves on the road surfaces such as road, municipal highway, backroad and airfield runway.Screw material-distributing system is the core work of paver
Component, effect are that the homogeneous media void that paves such as the cement stabilizing concrete material for unloading dumper down or asphalt is laid on
On entire width of roadway.Screw material-distributing system include distribution box, helical blade, helical axis, sunpender, ironing component, front apron and
Other structures connector.
In order to reduce the sub-material resistance of screw material-distributing system, the anti-isolation ability of paver is improved, existing various brands pave
Machine is all made of the helical blade of big spiral shell diameter, fine pitch, and helical blade diameter D is 470mm-500mm, and helical blade screw pitch S is
310mm-320mm。
Inventors have found that at least there are following problems in the prior art: in screw material-distributing slot, large granular materials kinetic energy compared with
Greatly, it is easy to be deposited at sunpender after rolling, forms road surface depth isolation.
Summary of the invention
The present invention proposes a kind of screw material-distributing system and paver, to optimize the structure of screw material-distributing system.
The embodiment of the invention provides a kind of screw material-distributing systems, comprising:
Material toggling component, for stirring material；
Component is pressed, is set near the material toggling component, and be configured to press the material after the material toggling component is stirred；
And
Sunpender is rotatably connected with the material toggling component, and the sunpender is used to support the material toggling component, the sunpender quilt
Be configured at wherein one section along material moving direction cross-sectional area be increase.
In some embodiments, the sunpender includes:
First connecting portion is configured to connect with bracket；And
Second connecting portion is connect with the first connecting portion, and the cross section of the second connecting portion be it is trapezoidal, it is described
One end of second connecting portion is fixed with the material toggling component.
In some embodiments, the inclination angle of the second connecting portion is 5 °~35 °.
In some embodiments, the first connecting portion and the second connecting portion are integrated.
In some embodiments, screw material-distributing system further include:
Backgauge component, set on the ironing component towards the side of the material toggling component；Wherein, the backgauge component is by structure
It makes to collide the material toggling component and transfering to the material of coming, so that being fallen after material collision.
In some embodiments, the backgauge component includes:
Mounting portion is fixed with the ironing component；And
Curved portion is installed on the mounting portion, and the curved portion is configured to collide what the material toggling component dial-out came
Material.
In some embodiments, the mounting portion and the curved portion are integrated.
In some embodiments, the installation site of the backgauge component is higher than the position of the rotation central axis line of the material toggling component
It sets.
In some embodiments, screw material-distributing system further include:
Side plate is two groups, and one is mounted on the first end of the ironing component, another to be mounted on the second of the ironing component
End.
In some embodiments, the material toggling component includes:
Shaft；And
Blade assembly is installed on the shaft, and rotates with the rotation of the shaft.
In some embodiments, the quantity of the blade assembly is at least two, and each blade assembly includes:
Axle sleeve, the mounting hole being connect including at least two with the shaft；And
Blade is installed on the axle sleeve.
In some embodiments, each axle sleeve includes two mounting holes, and two mounting hole dispersions are located at the axle sleeve
On blade two sides.
In some embodiments, the distance of the center line of two mounting holes is equal to the leaf on the same axle sleeve
The half of the screw pitch of piece.
The embodiment of the present invention also provides a kind of paver, including screw material-distributing system provided by any technical solution of the present invention
System.
The tilt angle of above-mentioned technical proposal, sunpender is consistent with material movement direction, in the case where proof strength, reduces
At least one of them ruler that the cross-sectional area of vertical material direction of motion upper hanger, i.e. sunpender are located at material movement direction upstream
It is very little small, reduce the case where large granular materials collide sunpender, solves the lateral isolation formed at sunpender by bulky grain accumulation
Problem.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is screw material-distributing system structural schematic diagram provided in an embodiment of the present invention；
Fig. 2 is that screw material-distributing system provided in an embodiment of the present invention presses component and the connection relationship solid of backgauge component is shown
It is intended to；
Fig. 3 is that the connection relationship side view of screw material-distributing system provided in an embodiment of the present invention ironing component and backgauge component is shown
It is intended to；
Fig. 4 is the stereoscopic schematic diagram of screw material-distributing system sunpender provided in an embodiment of the present invention；
Fig. 5 is the schematic top plan view of screw material-distributing system sunpender provided in an embodiment of the present invention；
Fig. 6 is screw material-distributing system hanger erection state stereoscopic schematic diagram provided in an embodiment of the present invention；
Fig. 7 is screw material-distributing system hanger erection state schematic front view provided in an embodiment of the present invention；
Fig. 8 is the schematic front view of screw material-distributing system blade assembly provided in an embodiment of the present invention；
Fig. 9 is the multiple blade assembly connection schematic diagrams of screw material-distributing system provided in an embodiment of the present invention；
Figure 10 is screw material-distributing system material toggling component installation condition schematic front view provided in an embodiment of the present invention；
Figure 11 is screw material-distributing system material toggling component installation condition schematic top plan view provided in an embodiment of the present invention.
Specific embodiment
Technical solution provided by the invention is illustrated in more detail below with reference to Fig. 1~Figure 11.
Present document relates to noun or term explain.
Laterally isolate: on paver paving width direction segregation phenomenon occurs for the uniformly mixed medium that paves.That is: it is spreading out
It spreads in width direction, each component (dividing according to grain diameter size) for forming the medium that paves is unevenly distributed.
Depth isolation: the uniformly mixed medium that paves paves in paver occurs segregation phenomenon on depth direction.That is: it is spreading out
It spreads on depth direction, each component (dividing according to grain diameter size) for forming the medium that paves is unevenly distributed.
Referring to Fig. 1 and Fig. 6, the embodiment of the invention provides a kind of screw material-distributing systems, including material toggling component 1, ironing group
Part 2 and sunpender 5.Material toggling component 1 is for stirring material.It presses component 2 to be set near material toggling component 1, is configured to ironing material toggling
Component 1 stir after material.Sunpender 5 is rotatably connected with material toggling component 1, and sunpender 5 is used to support material toggling component 1, and sunpender 5 is by structure
Make at least one of them along material moving direction cross-sectional area be increase, be specifically such as gradually increased.
Referring to fig. 4, in some embodiments, it is transversal along material moving direction to be configured at least one of them for sunpender 5
Area becomes larger.The sunpender 5 that 5 cross-sectional area of sunpender i.e. positioned at material movement upstream is less than positioned at material movement downstream is transversal
Area.For the direction shown in Fig. 6, i.e., the cross-sectional area that sunpender 5 is located at right side is less than 5 cross-sectional area of sunpender positioned at left side.
The tilt angle of sunpender 5 is consistent with material movement direction, in the case where proof strength, reduces vertical material fortune
The cross-sectional area of dynamic direction upper hanger 5, i.e., sunpender 5 be located at material movement direction upstream size it is small, reduction large granular materials touch
The case where hitting sunpender 5 solves the problems, such as the lateral isolation formed at sunpender 5 by bulky grain accumulation.
Sunpender 5 minimizes 5 cross-sectional area of sunpender on material movement direction, guarantees stream of the material at sunpender 5
It is dynamic, reduce material from sunpender 5 by when resistance, improve Flow of Goods and Materials performance；Reduce large granular materials collision sunpender 5
The case where, solve the problems, such as the lateral isolation formed at sunpender 5 by bulky grain accumulation.
Referring to fig. 4 and Fig. 6, in some embodiments, sunpender 5 includes first connecting portion 51 and second connecting portion 52.First
Interconnecting piece 51 is configured to connect with bracket 6, for example is bolted.Second connecting portion 52 is connect with first connecting portion 51,
And the cross section of second connecting portion 52 is trapezoidal, one end of second connecting portion 52 and the fixation of material toggling component 1, for example is welded.
Referring to Fig. 3 and Fig. 4, first connecting portion 51 is fixed on front board mount by bolt hole, and second connecting portion 52 is solid
It is scheduled on axle sleeve 13, for example is welded on axle sleeve 13.
Because of the characteristic of screw material-distributing, material existing lateral velocity in hopper has longitudinal velocity again, so material is being expected
Motion profile in slot is spiral-like curve, guarantees that 5 inclined direction of sunpender is consistent with material movement direction.
Sunpender 5 reduces the cross-sectional area of vertical material direction of motion upper hanger 5, most in the case where guaranteeing support strength
Limits reduce influence of the sunpender 5 to material movement.
Sunpender 5 has minimized the collision range between material and sunpender 5, especially large granular materials, larger journey
Degree reduce large granular materials because with sunpender 5 collide and the phenomenon that stay in herein, so as to improve laterally isolating at sunpender 5
Phenomenon.
Referring to fig. 4 and Fig. 5, in some embodiments, the inclination angle theta of second connecting portion 52 is 5 °~35 °.Wherein, inclination angle theta is
The angle of the plane m2 of the plane m1 and second connecting portion 52 of first connecting portion 51.
When material is asphalt, it is proposed that θ takes 10 °~20 °.When material is cement stabilized soil, it is proposed that θ takes 20 °
~30 °.
In some embodiments, first connecting portion 51 and second connecting portion 52 are integrated.
The sunpender 5 that above-mentioned technical proposal provides, meets the needs of load-bearing, and hardly interrupted helical blade 14
Continuity ensure that the driving force of helical blade 14 is enough；So that material is not easy to be deposited at spiral sunpender 5, especially
It is that large granular materials are less prone to accumulation, so not will form lateral isolation.
Referring to Fig. 1 and Fig. 3, in some embodiments, screw material-distributing system further includes backgauge component 3.Material toggling component 1 is used for
Stir material.It presses component 2 to be set near material toggling component 1, is configured to the material after ironing material toggling component 1 is stirred.Backgauge group
Part 3 is set to ironing component 2 towards the side of material toggling component 1.Wherein, it is next to be configured to the collision dial-out of material toggling component 1 for backgauge component 3
Material so that material collision after fall.
After material is transferred to from material toggling component 3, first it is thrown on backgauge component 3, is then collided by backgauge component 3
After fall.In collision process, the movement of material is miscellaneous sequence without chapter, due to inertia, the more miscellaneous sequence of the movement of big material without chapter,
So the state of random distribution is presented in the big material fallen, therefore solves the problems, such as the road surface depth isolation at ironing component.
Referring to Fig. 1 to Fig. 3, backgauge component 3 is fixed by bolts on ironing component 2.Backgauge component 3 is such as used and is had
The structure of cambered surface, either using facing directly or more broken line faces etc..
After installing backgauge component 3, large granular materials collide on the face of backgauge component 3 during rolling.Because big
Particles collision angle is irregular, so after collision, bulky grain is by the surface of random scatter material in hopper, with paving
The normal paving operation of machine, in the depth direction, large granular materials are random to be dispersed in molding road surface, to solve ironing group
The phenomenon that depth isolates at part 2.
Backgauge component 3 collides large granular materials with it, because of the randomness of movement, divides at random after large granular materials rebound
Cloth is randomly dispersed in molding road surface in hopper along stream, to solve the problems, such as depth isolation in road surface at ironing component 2.
Referring to Fig. 3, in some embodiments, backgauge component 3 includes mounting portion 31 and curved portion 32.Mounting portion 31 and ironing
Component 2 is fixed；Curved portion 32 is installed on mounting portion 31, and curved portion 32 is configured to collision material toggling component 1 and transfers to the material of coming.
Referring to Fig. 3, the curved portion 32 of backgauge component 3 is using 11 center of shaft as center of circle A, and radius is the arc surface of R, R's
Value is related with hopper width, for example is 200mm~650mm.Curved portion 32 also can be replaced inclined-plane, more broken line faces etc..
Above-mentioned technical proposal improves large granular materials in the distribution situation on hopper surface, enable large granular materials with
Machine is distributed in molding road surface.Specifically, after installing backgauge component 3, large granular materials are collided during rolling in cambered surface
In curved portion 32 because bulky grain collision angle be it is irregular, collision after, bulky grain object in hopper by random scatter
The surface of material in the depth direction, improves large granular materials in point on hopper surface with the normal paving operation of paver
Cloth situation, large granular materials are random to be dispersed in molding road surface, thus the phenomenon that solving depth isolation at ironing component 2.
Referring to Fig. 3, in some embodiments, mounting portion 31 and curved portion 32 are integrated.The backgauge component 3 of the structure,
Structural strength is good, long service life.
In some embodiments, the installation site of backgauge component 3 is higher than the position of the rotation central axis line of material toggling component 1.It should
The material that mounting structure makes backgauge component 3 be placed exactly in the dial-out of material toggling component 1 is thrown away on path, so that material is sufficiently touched
It hits.
Referring to fig. 2, in some embodiments, screw material-distributing system further includes side plate 4, and side plate 4 is two groups, one group of side plate 4
Set on the first end of ironing component 2, another group of side plate 4 is set to the second end of ironing component 2.
In some embodiments, material toggling component 1 includes shaft 11 and blade assembly 12.Blade assembly 12 is installed on shaft
11, and rotated with the rotation of shaft 11.
Referring to Fig. 6, in some embodiments, the quantity of blade assembly 12 is at least two.Each blade assembly 12 includes axis
Set 13 and blade 14.Axle sleeve 13 includes at least two mounting holes 15 connecting with shaft 11.Blade 14 is installed on axle sleeve 13.
Above-mentioned technical proposal changes 14 structure of helical blade and its fixed form, improves the intensity of helical blade 14,
It improves 14 stress of blade, reduce 14 fracture of root crash rate of blade.
Referring to Fig. 8, in some embodiments, each axle sleeve 13 include two mounting holes 15, respectively the first mounting hole 15a and
Second mounting hole 15b.Two dispersions of mounting hole 15 are located at 14 two sides of blade on the axle sleeve 13.
Axle sleeve 13 is rendered as asymmetric structure, i.e., the length positioned at the axle sleeve 13 of 14 two sides of blade is different.
The one end on original structure of axle sleeve 13 lengthens L1, axle sleeve 13 is located at 14 two sides of blade and is respectively equipped with a mounting hole 15,
The size of two mounting holes 15 is such as identical.The axle sleeve 13 of above structure changes it on the basis of original production technology is constant
Casting pattern can process.
Above-mentioned technical proposal changes the structure and its fixed form of axle sleeve 13, and the stress for improving helical blade 14 is flat
Weighing apparatus property increases the fixing intensity of helical blade 14, to improve its service life.Meanwhile not increasing the peace in shaft 11
In the case of filling 15 quantity of hole, it ensure that intensity is unaffected.
Above-mentioned technical proposal optimizes spiral in the case where keeping 14 working position of helical blade and 11 structure permanence condition of shaft
14 mounting part bit architecture of blade extends helical blade 14 and installs the length for fixing half round sleeve 13, so that forward and backward adjacent two
A helical blade 14 shares an axis hole and is fixed, and original one-bolt fastening mode is become double bolt fixing methods, is mentioned
High 14 fixing intensity of blade reduces loose or dislocation and fracture of root failure risk.
Referring to Fig. 8 to Figure 10, in some embodiments, the distance of the center line of two mounting holes 15 on the same axle sleeve 13
Equal to the screw pitch L of blade 142Half.
When installation, spiral is bolted between adjoining spiral blade 14 and is linked together, and opposite direction is fixed on
In shaft 11.Each helical blade 14 is fixed in shaft 11 there are two bolt, uniform force, and fixing intensity is high.Shaft
Do not have to newly-increased fixation hole on 11, ensure that the intensity of shaft 11 itself is constant.
In entire paver transverse direction, the mounting hole 15 of material toggling component 1 is uniformly distributed, and screw material-distributing system stress is flat
Weighing apparatus, intensity are constant.
As shown in Figure 9, Figure 10, each material toggling component 1 is bolted on one by one in shaft 11, completes helical blade 14
Assembly.
The installation site of two neighboring blade 14 meets following relationship: as shown in Figure 7, Figure 8, the first peace of helical blade second
The axial location of dress hole 15a is overlapped with the axial location of the second mounting hole 15b of helical blade first, the second peace of helical blade second
The axial location of dress hole 15b is overlapped with the axial location of the first mounting hole 15a of helical blade third.
Lateral sub-material is realized under the driving of helical blade 14, and during material movement, is come to greatest extent
Press the resistance of component 2 and sunpender 5.Meanwhile each material toggling component 1 is fixed by two bolts, positioned at the both ends of blade 14,
Fixed point quantity increases to 2, fixing intensity enhancing.After the failure of some blade 14, it is only necessary to two bolts for fixing it are removed,
New helical blade 14 is changed, other structures are not influenced, replacing options are easy to be reliable.
The embodiment of the present invention also provides a kind of paver, including screw material-distributing system provided by any technical solution of the present invention
System.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is only the present invention and simplified description for ease of description, rather than indicates or imply signified device
Or element must have a particular orientation, construct and operate for specific orientation, thus should not be understood as in present invention protection
The limitation of appearance.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
But these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (14)
1. a kind of screw material-distributing system characterized by comprising
Material toggling component (1), for stirring material；
It presses component (2), is set near the material toggling component (1), and be configured to press after the material toggling component (1) stirs
Material；And
Sunpender (5) is rotatably connected with the material toggling component (1), and the sunpender (5) is used to support the material toggling component (1), institute
Stating sunpender (5) and being configured at least one of them along material moving direction cross-sectional area is to increase.
2. screw material-distributing system according to claim 1, which is characterized in that the sunpender (5) includes:
First connecting portion (51) is configured to connect with bracket (6)；And
Second connecting portion (52) is connect with the first connecting portion (51), and the cross section of the second connecting portion (52) is ladder
Shape, one end of the second connecting portion (52) and the material toggling component (1) are fixed.
3. screw material-distributing system according to claim 2, which is characterized in that the inclination angle of the second connecting portion (52) is 5 °
~35 °.
4. screw material-distributing system according to claim 2, which is characterized in that the first connecting portion (51) and described second
Interconnecting piece (52) is integrated.
5. screw material-distributing system according to claim 1, which is characterized in that further include:
Backgauge component (3) is set to ironing component (2) towards the side of the material toggling component (1)；Wherein, the backgauge group
Part (3) is configured to collide the material that material toggling component (1) dial-out comes, so that falling after material collision.
6. screw material-distributing system according to claim 5, which is characterized in that the backgauge component (3) includes:
Mounting portion (31), it is fixed with the ironing component (2)；And
Curved portion (32) is installed on the mounting portion (31), and the curved portion (32) is configured to collide the material toggling component
(1) the material of coming is transferred to.
7. screw material-distributing system according to claim 6, which is characterized in that the mounting portion (31) and the curved portion
It (32) is integrated.
8. screw material-distributing system according to claim 5, which is characterized in that the installation site of the backgauge component (3) is high
In the position of the rotation central axis line of the material toggling component (1).
9. screw material-distributing system according to claim 5, which is characterized in that further include:
Side plate (4) is two groups, and one is mounted on the first end of ironing component (2), another to be mounted on the ironing component (2)
Second end.
10. screw material-distributing system according to claim 5, which is characterized in that the material toggling component (1) includes:
Shaft (11)；And
Blade assembly (12) is installed on the shaft (11), and is rotated with the rotation of the shaft (11).
11. screw material-distributing system according to claim 10, which is characterized in that the quantity of the blade assembly (12) is extremely
Two few, each blade assembly (12) includes:
Axle sleeve (13), the mounting hole (15) being connect including at least two with the shaft (11)；And
Blade (14) is installed on the axle sleeve (13).
12. screw material-distributing system according to claim 11, which is characterized in that each axle sleeve (13) includes two installations
Hole (15), two mounting hole (15) dispersions are located at blade (14) two sides on the axle sleeve (13).
13. screw material-distributing system according to claim 12, which is characterized in that same upper two institutes of axle sleeve (13)
State the center line of mounting hole (15) distance be equal to the blade (14) screw pitch half.
14. a kind of paver, which is characterized in that including any screw material-distributing system of claim 1~13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015927.5A CN109468917B (en) | 2019-01-08 | 2019-01-08 | Spiral material distributing system and paver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910015927.5A CN109468917B (en) | 2019-01-08 | 2019-01-08 | Spiral material distributing system and paver |
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| Publication Number | Publication Date |
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| CN109468917A true CN109468917A (en) | 2019-03-15 |
| CN109468917B CN109468917B (en) | 2023-10-03 |
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