CN108316605B - Ground overhead leveling assembly and leveling method - Google Patents
Ground overhead leveling assembly and leveling method Download PDFInfo
- Publication number
- CN108316605B CN108316605B CN201711481672.9A CN201711481672A CN108316605B CN 108316605 B CN108316605 B CN 108316605B CN 201711481672 A CN201711481672 A CN 201711481672A CN 108316605 B CN108316605 B CN 108316605B
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- plate
- adjusting plate
- leveling
- supporting rod
- ground
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000008093 supporting effect Effects 0.000 claims abstract description 141
- 230000001105 regulatory effect Effects 0.000 claims 6
- 238000010030 laminating Methods 0.000 claims 1
- 239000004568 cement Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000011083 cement mortar Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/02—Flooring or floor layers composed of a number of similar elements
- E04F15/024—Sectional false floors, e.g. computer floors
- E04F15/02447—Supporting structures
- E04F15/02464—Height adjustable elements for supporting the panels or a panel-supporting framework
Abstract
The invention discloses a ground overhead leveling assembly and a leveling method. The ground overhead leveling assembly comprises a supporting rod, wherein the shaft surface of the supporting rod comprises a supporting surface, and the supporting surface is a plane; the two leveling pieces comprise a first adjusting plate and a second adjusting plate, one side of each first adjusting plate and one side of each second adjusting plate are rotatably connected to the supporting rod, and each first adjusting plate and each second adjusting plate are opposite to the supporting rod; the first adjusting plate and the second adjusting plate on each leveling piece are respectively positioned at two sides of the supporting rod; one side of each first adjusting plate far away from the supporting rod and one side of each second adjusting plate far away from the supporting rod are parallel to the supporting surface. The ground overhead leveling method is used for leveling the ground. The ground overhead leveling assembly and the leveling method provided by the invention have the advantages that the difficulty in overhauling or maintaining the pipeline and the electric wire is reduced, the potential safety hazard is reduced, the labor intensity is reduced, and the ground flatness is improved.
Description
Technical Field
The invention relates to the technical field of building decoration, in particular to a ground overhead leveling assembly and a leveling method.
Background
In the interior and exterior decoration, the whole ground needs to be leveled before the floor is installed, so that the flatness of the floor meets the building requirements after the floor is installed on the ground.
In the prior art, the ground surface provided with the pipeline and the electric wire is generally leveled by cement mortar, then the pipeline and the electric wire are paved on the leveled cement mortar, cement paste is poured on the pipeline and the electric wire to realize the effect that the pipeline and the electric wire are paved by cement paste, the cement paste is leveled by self-leveling, and the floor is paved on the leveled cement paste to finish pavement of the ground surface. The inventor finds that the ground pavement mode for installing the pipeline and the electric wire has the following defects in the process of realizing the invention: the first, pipeline or electric wire is difficult to maintain or overhaul once installed, so that certain potential safety hazards exist after ground laying; secondly, the cement paste leveling needs to be performed on the ground in the later period of manual work, so that the manual labor intensity is increased; thirdly, for the ground with larger area, the ground is leveled by cement paste, so that certain fluctuation exists, and the requirement on flatness is difficult to meet.
Therefore, there is a need to solve the above-mentioned technical problems.
Disclosure of Invention
The invention provides a ground overhead leveling assembly and a leveling method, which are used for solving the defects in the prior art, reducing the difficulty of overhauling or maintaining a pipeline and an electric wire, reducing potential safety hazards, reducing the intensity of manual labor and improving the flatness of the ground.
The invention provides a ground overhead leveling assembly, comprising: the shaft surface of the supporting rod comprises a supporting surface, and the supporting surface is a plane; the leveling pieces are respectively positioned at two ends of the supporting rod, each leveling piece comprises a first adjusting plate and a second adjusting plate, one side of each first adjusting plate and one side of each second adjusting plate are respectively and rotatably connected to the supporting rod, and each first adjusting plate and each second adjusting plate are opposite to the supporting rod; the first adjusting plate and the second adjusting plate on each leveling piece are respectively positioned at two sides of the supporting rod; one side of each first adjusting plate far away from the supporting rod and one side of each second adjusting plate far away from the supporting rod are parallel to the supporting surface.
Optionally, the leveling component further comprises a first fixing plate and a second fixing plate, wherein the first fixing plate is rotatably connected to one side, far away from the supporting rod, of the first adjusting plate; the second fixing plate is rotatably connected to one side, far away from the supporting rod, of the second adjusting plate, and the side, far away from the supporting rod, of the first fixing plate and the side, far away from the supporting rod, of the second fixing plate are parallel to the supporting surface.
Optionally, the rotation axis of the first fixing plate and the rotation axis of the second fixing plate are parallel to the supporting surface.
Optionally, the support rod is a square tube, and one side of each first adjusting plate and one side of each second adjusting plate are both rotatably connected to a surface of the square tube, which is opposite to the support surface.
Optionally, each leveling piece further comprises a connecting plate, the connecting plate comprises a first connecting edge and a second connecting edge which are oppositely arranged, the connecting plates are attached to the square tubes, the first adjusting plates are rotatably connected to the first connecting edge, and the second adjusting plates are rotatably connected to the second connecting edge.
Optionally, the first connecting edge and the second connecting edge are parallel to the axial direction of the support rod.
Optionally, at least one hinge is provided between the connecting plate and the first adjusting plate, between the first fixing plate and the first adjusting plate, and between the second fixing plate and the second adjusting plate.
Optionally, the ground overhead leveling assembly further comprises two leveling pieces which are located between two ends of the supporting rod and are arranged along the axial direction of the supporting rod.
Optionally, in the leveling pieces between the support rods, the included angles between the two first connecting edges and the axial direction of the support rods are 45 degrees, and the included angles between the two first connecting edges are right angles.
Based on the same inventive concept, the invention also provides a ground overhead leveling method, which levels the ground through the ground overhead leveling component, and comprises the following steps: determining the horizontal height of the supporting surface; the first adjusting plate and the second adjusting plate on each leveling piece are rotated respectively, so that one side, far away from the supporting rod, of each first adjusting plate and one side, far away from the supporting rod, of each second adjusting plate are abutted against the ground; respectively fine-tuning the included angle between each first adjusting plate and the supporting surface and the included angle between each second adjusting plate and the supporting surface so that the supporting surface is positioned at a determined horizontal height and perpendicular to a plumb line; and fixing one side, far away from the supporting rod, of each first adjusting plate and one side, far away from the supporting rod, of each second adjusting plate on the ground.
According to the ground overhead leveling assembly and the leveling method, the supporting rods are overhead by the two leveling pieces after the horizontal height of the supporting surface is determined, and the distance between one side, far away from the supporting rods, of each first adjusting plate and the supporting surface in the plumb line direction and the distance between one side, far away from the supporting rods, of each second adjusting plate and the supporting surface in the plumb line direction are equal to the horizontal height value determined by the supporting surface through rotating the first adjusting plates and the second adjusting plates. On the basis of realizing leveling, the pipeline and the electric wire can be arranged between the first adjusting plate and the second adjusting plate in a penetrating way, so that the difficulty in later maintenance or maintenance of the pipeline and the electric wire is reduced, the probability of potential safety hazard occurrence is reduced, the labor intensity is reduced, and the flatness of the ground is improved.
Drawings
The objects and advantages of the present invention will be better understood by describing in detail preferred embodiments thereof with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of a ground overhead leveling assembly according to an alternative embodiment of the present invention.
Fig. 2 is a top view of fig. 1.
Front view of fig. 1 of fig. 3.
Fig. 4 is a schematic structural view of a leveling member according to an alternative embodiment of the present invention.
Fig. 5 is a front view of fig. 4.
Fig. 6 is a top view of fig. 4.
Detailed Description
The terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible in this specification are defined with respect to the configurations shown in the drawings, and the terms "inner" and "outer" refer to the relative concepts of the terms toward or away from the geometric center of a particular component, respectively, and thus may be changed accordingly depending on the location and use state of the component. These and other directional terms should not be construed as limiting terms.
Fig. 1 is a schematic structural view of a ground overhead leveling assembly according to an alternative embodiment of the present invention, fig. 2 is a top view of fig. 1, and fig. 3 is a front view of fig. 1. As shown in fig. 1 to 3, an embodiment of the present invention provides a ground overhead leveling assembly including a supporting bar 1 and two leveling members 2.
The axial surface of the supporting rod 1 comprises a supporting surface 11, the supporting surface 11 is a plane, the supporting rod 1 is in an overhead state under the supporting action of the leveling piece 2, and the supporting surface 11 is used for supporting a floor. The supporting surface 11 is arranged to be a plane, the floor can be directly attached to the supporting surface 11 after the supporting surface 11 is leveled, the floor can be guaranteed to be in a horizontal state, the supporting rods 1 are arranged on the ground, the floor can be guaranteed to be in a horizontal state after the whole ground is paved, and the labor intensity of workers is reduced. Two leveling pieces 2 are respectively positioned at two ends of the supporting rod 1, and the two ends of the supporting rod 1 are supported to ensure that the supporting rod 1 is in an overhead state. Each leveling member 2 includes a first adjusting plate 21 and a second adjusting plate 22, and one side of each first adjusting plate 21 and one side of each second adjusting plate 22 are rotatably connected to the supporting rod 1, so as to facilitate adjustment of vertical distances between the first adjusting plate 21 and the second adjusting plate 22 and the supporting surface 11. Each first adjusting plate 21 and each second adjusting plate 22 face away from the supporting rod 1, so as to avoid interference with the supporting surface 11. The first adjusting plate 21 and the second adjusting plate 22 on each leveling member 2 are respectively located at two sides of the supporting rod 1, and support the supporting rod 1 from two sides, so that stability of the supporting rod 1 is guaranteed. One side of each first adjusting plate 21 far away from the supporting rod 1 and one side of each second adjusting plate 22 far away from the supporting rod 1 are parallel to the supporting surface 11, so that the first adjusting plate 21 and the second adjusting plate 22 take edges as supports, and the levelness adjusting effect of the supporting rod 1 is ensured.
The ground overhead leveling assembly has the following adjusting flow: after the supporting rod 1 is overhead by the leveling piece 2, the distance between one side, far away from the supporting rod 1, of each first adjusting plate 21 and the supporting surface 11 in the plumb line direction and the distance between one side, far away from the supporting rod 1, of each second adjusting plate 22 and the supporting surface 11 in the plumb line direction are equal to the level value determined by the supporting surface 11 by rotating the first adjusting plates 21 and the second adjusting plates 22, so that the levelness of the supporting surface 11 is ensured. Then, the side of the first adjusting plate 21 far from the supporting rod 1 and the side of the second adjusting plate 22 far from the supporting rod 1 are fixed on the ground. The pipeline and the electric wire can be arranged between the first adjusting plate 21 and the second adjusting plate 22 in a penetrating way, so that the difficulty in later maintenance or repair of the pipeline and the electric wire is reduced, the probability of potential safety hazard occurrence is reduced, the labor intensity is lightened, and the flatness of the ground is improved.
It should be noted that, the two leveling members 2 are respectively located at two ends of the supporting rod 1, which means that the first adjusting plate 21 and the second adjusting plate 22 on each leveling member 2 are connected to the end of the supporting rod 1. The first adjusting plate 21 and the second adjusting plate 22 on each leveling piece 2 are respectively located at two sides of the supporting rod 1, namely, the first adjusting plate 21 and the second adjusting plate 22 on each leveling piece 2 extend towards two sides of the supporting rod 1 respectively, the first adjusting plate 21 and the second adjusting plate 22 form a structure similar to an eight-shaped structure, the supporting rod 1 is at the butt joint part of the upper part of the eight-shaped structure, both sides of the supporting rod 1 are guaranteed to be stressed, and the supporting rod 1 is prevented from tilting.
The ground overhead leveling assembly provided by the embodiment of the invention. After the level of the supporting surface 11 is determined, the supporting rods 1 are suspended by the two leveling pieces 2, and the distance between the side, far away from the supporting rods 1, of each first adjusting plate 21 and the supporting surface 11 in the plumb line direction and the distance between the side, far away from the supporting rods 1, of each second adjusting plate 22 and the supporting surface 11 in the plumb line direction are equal to the level value determined by the supporting surface 11 by rotating the first adjusting plates 21 and the second adjusting plates 22. On the basis of realizing leveling, the pipeline and the electric wire can be arranged between the first adjusting plate 21 and the second adjusting plate 22 in a penetrating way, so that the overhaul or maintenance difficulty of the pipeline and the electric wire in the later period is reduced, the occurrence probability of potential safety hazards is reduced, the labor intensity is reduced, and the ground flatness is improved.
Optionally, the leveling component 2 further includes a first fixing plate 24 and a second fixing plate 25, where the first fixing plate 24 is rotatably connected to a side of the first adjusting plate 21 away from the supporting rod 1; the second fixing plate 25 is rotatably connected to a side, far away from the support rod 1, of the second adjusting plate 22, and both a side, far away from the support rod 1, of the first fixing plate 24 and a side, far away from the support rod 1, of the second fixing plate 25 are parallel to the support surface 11. After the position of each first adjusting plate 21 is fixed, one side, far away from the supporting rod 1, of the first adjusting plate 21 is fixed on the ground through the first fixing plate 24, so that the contact area is increased, and the connection stability of the first adjusting plate 21 and the ground is improved. Similarly, after the position of each second adjusting plate 22 is fixed, one side, far away from the supporting rod 1, of the second adjusting plate 22 is fixed on the ground through the second fixing plate 25, so that the contact area is increased, and the connection stability of the second adjusting plate 22 and the ground is improved.
Preferably, the rotation axis of the first fixing plate 24 and the rotation axis of the second fixing plate 25 are parallel to the supporting surface 11. The first fixing plate 24 can be attached to the ground by rotating, so that the contact area is further increased, and the connection stability of the first adjusting plate 21 and the ground is further improved. Similarly, the second fixing plate 25 can be attached to the ground by rotating, so that the contact area is further increased, and the connection stability of the second adjusting plate 22 and the ground is further improved.
Alternatively, the support rod 1 is a square tube, and one side of each first adjusting plate 21 and one side of each second adjusting plate 22 are rotatably connected to a surface of the square tube facing away from the support surface 11. The axial surfaces of the square tubes are all plane, so that the difficulty that the supporting surface 11 is set to be plane is simplified, and the square tubes adopt hollow structures, so that materials can be effectively saved, and the cost is reduced.
Fig. 4 is a schematic structural view of a leveling member according to an alternative embodiment of the present invention, fig. 5 is a front view of fig. 4, and fig. 6 is a top view of fig. 4.
Referring to fig. 1 to 6, further, each leveling member 2 further includes a connecting plate 23, the connecting plate 23 includes a first connecting edge 26 and a second connecting edge 27 that are disposed opposite to each other, the connecting plate 23 is attached to the square tube, the first adjusting plate 21 is rotatably connected to the first connecting edge 26, and the second adjusting plate 22 is rotatably connected to the second connecting edge 27. The leveling member 1 can be assembled and formed first and then be mounted on the supporting rod 1 through the connecting plate 23, so that the mounting difficulty of the first adjusting plate 21 and the second adjusting plate 22 is reduced. And the number of the leveling pieces 2 can be flexibly set according to the length of the supporting rod 1, so that the leveling device is simple and convenient.
Preferably, the first connecting edge 26 and the second connecting edge 27 are parallel to the axial direction of the support rod 1, so that the supporting effect of the first adjusting plate 21 and the second adjusting plate 22 on the support rod 1 is balanced, and the stability of the support rod 1 is improved.
Further, at least one of the connection plate 23 and the first adjustment plate 21, the first fixing plate 24 and the first adjustment plate 21, and the second fixing plate 25 and the second adjustment plate 22 is hinged. The hinge has the advantages of firm connection, flexible rotation and convenient implementation.
Optionally, the ground overhead leveling assembly further comprises two leveling pieces 2 which are located between two ends of the supporting rod 1 and are arranged along the axial direction of the supporting rod 1. The two leveling pieces 2 additionally added between the two ends of the supporting rod 1 can effectively support the part of the supporting rod 1 positioned between the two ends of the supporting rod 1, so that the levelness of the supporting surface 11 is ensured.
Referring to fig. 1, as an alternative implementation process, in the leveling members 2 between the support rods 1, the included angles between the two first connecting edges 26 and the axial direction of the support rods 1 are 45 °, and the included angles between the two first connecting edges 26 are right angles. The arrangement can effectively prevent the connecting plate 23 from tilting, and ensures the stability of the supporting rod 1.
Further, the structure of the first adjusting plate 21 is the same as that of the second adjusting plate 22, and the first adjusting plate 21 and the second adjusting plate 22 on two sides of the connecting plate 23 are symmetrically arranged, so that the supporting rod 1 can be ensured to be more stable after the supporting rod 1 is erected on the leveling member 2.
Based on the same inventive concept, the invention also provides a ground overhead leveling method, which levels the ground through the ground overhead leveling component, and comprises the following steps: determining the level of the support surface 11; the first adjusting plate 21 and the second adjusting plate 22 on each leveling piece 2 are respectively rotated, so that one side of each first adjusting plate 21 far away from the supporting rod 1 and one side of each second adjusting plate 22 far away from the supporting rod 1 are abutted against the ground; fine-tuning the angle between each first adjusting plate 21 and the supporting surface 11 and the angle between each second adjusting plate 22 and the supporting surface 11, respectively, so that the supporting surface 11 is located at a determined level and perpendicular to the plumb line; one side of each of the first adjusting plates 21, which is away from the support bar 1, and one side of each of the second adjusting plates 22, which is away from the support bar 1, are fixed to the ground.
The embodiment of the invention provides a ground overhead leveling assembly and a leveling method. After the level of the supporting surface 11 is determined, the supporting rods 1 are suspended by the two leveling pieces 2, and the distance between the side, far away from the supporting rods 1, of each first adjusting plate 21 and the supporting surface 11 in the plumb line direction and the distance between the side, far away from the supporting rods 1, of each second adjusting plate 22 and the supporting surface 11 in the plumb line direction are equal to the level value determined by the supporting surface 11 by rotating the first adjusting plates 21 and the second adjusting plates 22. On the basis of realizing leveling, the pipeline and the electric wire can be arranged between the first adjusting plate 21 and the second adjusting plate 22 in a penetrating way, so that the difficulty in later maintenance or maintenance of the pipeline and the electric wire is reduced, the probability of potential safety hazard occurrence is reduced, the labor intensity is reduced, and the flatness of the ground is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. A ground overhead leveling assembly, comprising:
the shaft surface of the supporting rod comprises a supporting surface, the supporting surface is a plane, and the supporting rod is a square pipe;
the leveling pieces are respectively positioned at two ends of the supporting rod, each leveling piece comprises a first adjusting plate and a second adjusting plate, one side of each first adjusting plate and one side of each second adjusting plate are respectively and rotatably connected to the supporting rod, and each first adjusting plate and each second adjusting plate are opposite to the supporting rod; the first adjusting plate and the second adjusting plate on each leveling piece are respectively positioned at two sides of the supporting rod; every keep away from on the first regulating plate one side of bracing piece with every on the second regulating plate keep away from the one side of bracing piece all be on a parallel with the holding surface, every one side of first regulating plate and every one side of second regulating plate all swivelling joint is in square pipe is dorsad on the surface of holding surface, every leveling piece still includes the connecting plate, the connecting plate is including relative first connecting limit and the second connecting limit that set up, the connecting plate laminating is in on the square pipe, first regulating plate swivelling joint is in first connecting edge, second regulating plate swivelling joint is in second connecting edge.
2. The floor overhead leveling assembly of claim 1, wherein the leveling member further comprises a first fixed plate and a second fixed plate, the first fixed plate being rotatably connected to the first adjustment plate on a side remote from the support bar; the second fixing plate is rotatably connected to one side, far away from the supporting rod, of the second adjusting plate, and the side, far away from the supporting rod, of the first fixing plate and the side, far away from the supporting rod, of the second fixing plate are parallel to the supporting surface.
3. The floor overhead leveling assembly of claim 2, wherein the axis of rotation of the first fixed plate and the axis of rotation of the second fixed plate are both parallel to the support surface.
4. The floor overhead leveling assembly of claim 2, wherein the first connection edge and the second connection edge are each parallel to an axial direction of the support bar.
5. The floor overhead leveling assembly of claim 4, wherein at least one of the connection plate and the first adjustment plate, the first fixed plate and the first adjustment plate, and the second fixed plate and the second adjustment plate is hinged.
6. The floor overhead leveling assembly of claim 5, further comprising two leveling members positioned between the ends of the support bar and aligned in an axial direction of the support bar.
7. The ground overhead leveling assembly according to claim 6, wherein in the leveling members located between the support bars, the included angles between the two first connecting sides and the axial direction of the support bars are 45 ° and the included angles between the two first connecting sides are right angles.
8. A ground overhead leveling method, characterized by leveling the ground by the ground overhead leveling assembly according to any one of claims 1-7, comprising:
determining the horizontal height of the supporting surface;
the first adjusting plate and the second adjusting plate on each leveling piece are rotated respectively, so that one side, far away from the supporting rod, of each first adjusting plate and one side, far away from the supporting rod, of each second adjusting plate are abutted against the ground;
respectively fine-tuning the included angle between each first adjusting plate and the supporting surface and the included angle between each second adjusting plate and the supporting surface so that the supporting surface is positioned at a determined horizontal height and perpendicular to a plumb line;
and fixing one side, far away from the supporting rod, of each first adjusting plate and one side, far away from the supporting rod, of each second adjusting plate on the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481672.9A CN108316605B (en) | 2017-12-30 | 2017-12-30 | Ground overhead leveling assembly and leveling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711481672.9A CN108316605B (en) | 2017-12-30 | 2017-12-30 | Ground overhead leveling assembly and leveling method |
Publications (2)
| Publication Number | Publication Date |
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| CN108316605A CN108316605A (en) | 2018-07-24 |
| CN108316605B true CN108316605B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711481672.9A Active CN108316605B (en) | 2017-12-30 | 2017-12-30 | Ground overhead leveling assembly and leveling method |
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| Country | Link |
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| CN (1) | CN108316605B (en) |
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| CN112351179A (en) * | 2020-11-06 | 2021-02-09 | 维沃移动通信有限公司 | Camera module and electronic equipment |
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| US10106991B2 (en) * | 2015-06-01 | 2018-10-23 | Wausau Tile, Inc. | Paver pedestal and method of installing same |
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| JPH1054131A (en) * | 1996-08-09 | 1998-02-24 | Nippon Kayaku Co Ltd | Floor panel base |
| JP2002327784A (en) * | 2001-05-07 | 2002-11-15 | Yoshihiro Shiotani | Shock absorbing body using of rubber diagonal |
| ES1070518U (en) * | 2009-04-17 | 2009-09-18 | Germans Boada S.A. | Levelling device for the placing of pieces for covering floors and similar |
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| CN112351179A (en) * | 2020-11-06 | 2021-02-09 | 维沃移动通信有限公司 | Camera module and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108316605A (en) | 2018-07-24 |
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