CN113323057A - Tamping method for side slope soil body - Google Patents
Tamping method for side slope soil body Download PDFInfo
- Publication number
- CN113323057A CN113323057A CN202110683666.1A CN202110683666A CN113323057A CN 113323057 A CN113323057 A CN 113323057A CN 202110683666 A CN202110683666 A CN 202110683666A CN 113323057 A CN113323057 A CN 113323057A
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- soil
- tamping
- compacting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/22—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/22—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling
- E02F5/223—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/22—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling
- E02F5/223—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling
- E02F5/226—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling with means for processing the soil, e.g. screening belts, separators; Padding machines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Soil Working Implements (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a method for tamping a side slope soil body, and belongs to the technical field of civil construction. The movable arm of the excavator is provided with a plurality of ramming devices, each ramming device is horizontally distributed on the same straight line, and the ramming devices are connected with the excavator in the following mode: fixing an installation plate parallel to the horizontal plane at the tail end of a movable arm of the excavator, fixing a shell of a speed reduction motor of each ramming device on the installation plate, and ramming the side slope under the condition that a self-tapping soil-compacting screw rod is vertical to the slope surface; translating the mounting plate from the lower position to the higher position of the side slope to finish tamping most of the side slope; the tamping of the slope special-shaped area and the corner position is realized by adjusting the inclination angle of the mounting plate and the horizontal plane or reducing the number of the soil tamping devices on the mounting plate. The invention has the advantages of high efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of civil construction, and relates to a method for tamping a side slope soil body.
Background
Ramming is the indispensable construction in the building process, and ramming is the process that makes the ram constantly vibrate from top to bottom and strike the ground and make the earth on ground tamped, and the on-spot large-scale ramming machine that all uses of general building, the ramming device that has vibrating structure of installation on the movable arm of excavator promptly, and the walking through the excavator is adjusted the ramming region territory, and this kind of vibrating ramming device has following shortcoming:
1. a large downward pressure (downward pressure vertical to a soil body plane) needs to be provided, namely, a movable arm of the excavator needs to apply a large impact force when moving the ramming device downwards so as to be matched with vibration to tamp the soil body, so that the energy consumption is large and the noise is large;
2. when soil body tamping is carried out on a slope surface, the external force vertical to the slope cannot be too large when the excavator applies the external force, otherwise, the excavator is easy to turn over or backward, as shown in fig. 4, the soil body tamping effect is poor, the slope needs to be tamped in sections under partial conditions, namely, a retaining wall of the slope is manufactured, then, longitudinal soil tamping is carried out, all the slopes are gradually tamped, the constructed slope is in a step shape, backfilling is needed to be restored, the construction period is long, the cost is high, and the soil body tamping effect is not ideal due to multiple constructions;
3. the existing soil ramming device has small thickness of a soil layer which can be rammed, needs to be filled and tamped for many times under partial conditions, and has low efficiency;
4. the construction difficulty of the positions of the wall corner, the outer side of the column and the like is high, the operation precision cannot be too high due to the fact that external force is applied by equipment such as an excavator and the like, and the manual handheld operation effect is not good.
Disclosure of Invention
The invention aims to provide a high-efficiency soil compacting device aiming at the problems in the prior art, and the technical problem to be solved by the invention is how to improve the efficiency of the soil compaction of the side slope, in particular to the side slope compaction of low-viscosity soil.
The purpose of the invention can be realized by the following technical scheme: the method for compacting the soil body of the side slope is characterized in that a plurality of soil compacting devices are utilized, each soil compacting device comprises a speed reducing motor, a soil compacting disc, a self-tapping soil compacting screw and a plurality of backfilling screws, a connecting shaft is fixedly arranged between an output shaft of the speed reducing motor and the self-tapping soil compacting screw, the soil compacting discs are connected onto the connecting shaft through splines, each backfilling screw is uniformly arranged on the lower side surface of each soil compacting disc in the circumferential direction, each backfilling screw is rotatably connected onto an installation disc, the installation disc is rotatably connected to the outer edge of each soil compacting disc, a gear is fixedly arranged at the outer ends of the backfilling screws, and each soil compacting disc is provided with a transmission gear ring meshed with each gear; the inner end of the backfill screw is positioned at the outer side of the upper end of the self-tapping soil-compacting screw;
the movable arm of the excavator is provided with a plurality of ramming devices, each ramming device is horizontally distributed on the same straight line, and the ramming devices are connected with the excavator in the following mode: fixing an installation plate parallel to the horizontal plane at the tail end of a movable arm of the excavator, fixing a shell of a speed reduction motor of each ramming device on the installation plate, and ramming the side slope under the condition that a self-tapping soil-compacting screw rod is vertical to the slope surface; translating the mounting plate from the lower position to the higher position of the side slope to finish tamping most of the side slope; the tamping of the slope special-shaped area and the corner position is realized by adjusting the inclination angle of the mounting plate and the horizontal plane or reducing the number of the soil tamping devices on the mounting plate.
Because of the forced guiding function of the backfilling screw on the soil, the landslide flow of the soil in the operation process can be greatly reduced in the side slope tamping operation process, and the self-tapping soil-pressing screw is used for compacting the soil body at a deeper position away from the surface of the side slope, so that the problems of side slope appearance change, soil body collapse and the like can be avoided; moreover, because the ramming device does not need large external force, can enter the soil layer through self tapping of the self-tapping soil-pressing screw rod, and generates large extrusion force on the soil body, a plurality of ramming devices can be simultaneously installed on one excavator, the efficiency is improved, the side turning and the backward turning of the excavator can not be caused, and the construction is safe and efficient.
Furthermore, a handheld frame is fixedly arranged on a shell of the speed reducing motor.
Furthermore, a mounting flange is arranged on a shell of the speed reducing motor.
Furthermore, the soil pressing plate is longitudinally connected to the connecting shaft in a sliding mode, and a buffer spring sleeved on the connecting shaft is arranged between the pressing plate and the shell of the speed reducing motor.
Furthermore, a limiting shaft sleeve positioned below the soil compacting plate is fixedly arranged on the connecting shaft.
Further, an inclination angle of 95-150 degrees is formed between the axis of the backfill screw and the axis of the self-tapping soil-compacting screw.
Furthermore, the soil compacting disc is in a cone shape, the diameter of the lower end of the cone is smaller than that of the upper end of the cone.
Further, the diameter of the spiral guide vane on the self-tapping soil-compacting screw is gradually reduced from top to bottom; the lower end of the self-tapping soil-compacting screw is provided with a positioning plug.
Furthermore, the diameter of the spiral guide vane on the backfill screw is gradually reduced from outside to inside.
The working principle is as follows: the shell of the speed reducing motor is fixed by being held by a hand or is connected with a movable arm of the excavator, the positioning plug contacts with a soil layer firstly to position the self-tapping soil-compacting screw, the self-tapping soil-compacting screw can contact with the soil layer with smaller pressing force, and can enter the deep part of the soil layer through rotation after the self-tapping soil-compacting screw contacts with the soil layer; when the backfill screw contacts with the soil on the outer side of the self-tapping soil-pressing screw, the resistance between the soil layer and the backfill screw prevents the backfill screw from synchronously rotating with the soil-pressing disc but automatically rotates under the action of the transmission gear ring and the gear, at the moment, the self-tapping soil-pressing screw is prevented from descending due to the action of the soil-pressing disc, the self-tapping soil-pressing screw and the self-tapping screw hole thereof realize slipping, the self-tapping soil-pressing screw extrudes the soil from top to bottom, the rotation of the backfill screw continuously feeds the soil on the outer side of the self-tapping soil-pressing screw and close to the surface layer of the soil body into the hole drilled by the self-tapping soil-pressing screw, and in the continuous extrusion process, as the soil below the soil-pressing disc is reduced, the rotation of the self-tapping soil-pressing screw can also slightly and frequently carry out the self-tapping downward movement, so that the backfill screw can feed more soil into the hole drilled by the self-tapping soil-pressing screw, in the process of applying external force to the shell of the speed reducing motor, the self-tapping soil-pressing screw intermittently downwards and intermittently extrudes soil, and the backfilling screw continuously pushes the soil below the soil-pressing disc to the central position of the soil-pressing disc; by switching the operation positions, the soil bodies in all the areas are tamped.
Because the backfill screw and the soil pressing disc rotate synchronously and rotate occasionally, soil in the whole circular area below the soil pressing disc can be acted by the backfill screw, and the soil is tightly pressed into a deeper soil layer, so that the soil body tamping effect is better.
Because this ramming earth device need not great external force and applys, also need not to make whole ramming earth device carry out the punching press to the soil layer, still do not have the vibration, make the noise little, the energy consumption is little, can hand-held operation. In addition, the self-tapping soil-compacting screw rod enters the deep layer of the soil body by the soil-compacting device in a self-tapping mode and extrudes deep soil, partial surface soil can be loosened in the process of compacting the soil body by the traditional soil-compacting device, and the ramming device has good soil-compacting effect because of no use, and can be even used for manufacturing a rammed soil wall, slope compacting and slope reinforcement.
When larger-size stones appear, the backfill screw can synchronously rotate along with the soil compacting disc to avoid.
Drawings
FIG. 1 is a schematic perspective view of the ramming device.
Figure 2 is a cross-sectional view of the present ramming device.
Fig. 3 is a bottom view of fig. 2.
Fig. 4 is a schematic view of the state of the existing ramming device when working on a slope.
Fig. 5 is a schematic view showing a state in which the ramming apparatus is used to work a slope.
In the figure, 1, a speed reducing motor; 2. a soil compacting plate; 3. a self-tapping soil-compacting screw; 4. backfilling the screw; 5. a connecting shaft; 6. mounting a disc; 7. a gear; 8. a transmission gear ring; 9. a hand-held frame; 10. installing a flange; 11. a buffer spring; 12. a limiting shaft sleeve; 13. positioning the plug; 14. and (7) mounting the plate.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, 2 and 3, the soil compacting device comprises a speed reducing motor 1, a soil compacting disc 2, a self-tapping soil compacting screw 3 and a plurality of backfilling screws 4, wherein a connecting shaft 5 is fixedly arranged between an output shaft of the speed reducing motor 1 and the self-tapping soil compacting screw 3, the soil compacting disc 2 is connected to the connecting shaft 5 through a spline, each backfilling screw 4 is uniformly arranged on the lower side surface of the soil compacting disc 2 in the circumferential direction, the backfilling screw 4 is rotatably connected to a mounting disc 6, the mounting disc 6 is rotatably connected to the outer edge of the soil compacting disc 2, a gear 7 is fixedly arranged at the outer end of each backfilling screw 4, and a transmission gear ring 8 meshed with each gear 7 is arranged on the soil compacting disc 2; the inner end of the backfill screw rod 4 is positioned outside the upper end of the self-tapping soil-compacting screw rod 3.
A hand-held frame 9 is fixedly arranged on the shell of the gear motor 1.
A mounting flange 10 is arranged on the shell of the speed reducing motor 1.
The soil pressing plate 2 is longitudinally connected to the connecting shaft 5 in a sliding mode, and a buffer spring 11 sleeved on the connecting shaft 5 is arranged between the pressing plate and the shell of the speed reducing motor 1.
A limiting shaft sleeve 12 positioned below the soil compacting plate 2 is fixedly arranged on the connecting shaft 5.
The inclination angle between the axis of the backfill screw 4 and the axis of the self-tapping soil-compacting screw 3 is 95-150 degrees, preferably about 110 degrees, and the inclination angle is adjusted according to the soil quality.
The soil compacting plate 2 is in a cone shape with the diameter of the lower end smaller than that of the upper end.
The diameter of the spiral guide vane on the self-tapping soil-compacting screw rod 3 is gradually reduced from top to bottom; the lower end of the self-tapping soil-compacting screw rod 3 is provided with a positioning plug 13.
The diameter of the spiral guide vane on the backfill screw 4 is gradually reduced from outside to inside.
The working principle is as follows: the shell of the speed reducing motor 1 is fixed by being held by a hand or is connected with a movable arm of an excavator, the positioning plug 13 contacts with a soil layer firstly to position the self-tapping soil-compacting screw rod 3, the self-tapping soil-compacting screw rod 3 can contact with the soil layer with smaller pressing force, when the self-tapping soil-compacting screw rod 3 contacts with the soil layer, the self-tapping soil-compacting screw rod 3 can actively enter the deep part of the soil layer through rotation, in the process, the soil compacting disc 2 synchronously rotates along with the self-tapping soil-compacting screw rod 3, the backfill screw rod 4 does not rotate, and the self-tapping soil-compacting screw rod 3 does not cause downward pressure on the soil body; when the backfill screw 4 contacts with the soil on the outer side of the self-tapping soil-pressing screw 3, the resistance between the soil layer and the backfill screw 4 prevents the backfill screw 4 from synchronously rotating with the soil-pressing disc 2 and automatically rotates under the action of the transmission gear ring 8 and the gear 7, at the moment, the self-tapping soil-pressing screw 3 is blocked to move downwards under the action of the soil-pressing disc 2, so that slipping between the self-tapping soil-pressing screw 3 and a self-tapping screw hole is realized, the self-tapping soil-pressing screw 3 extrudes the soil from top to bottom, the soil on the outer side of the self-tapping soil-pressing screw 3 and close to the surface layer of the soil body is continuously fed into the drilled hole of the self-tapping soil-pressing screw 3 by the rotation of the backfill screw 4, and in the continuous extrusion process, because the soil below the soil-pressing disc 2 is reduced, the rotation of the self-tapping soil-pressing screw 3 can also carry out 'self-tapping' downwards frequently, so that the backfill screw 4 can feed more soil into the drilled hole of the self-tapping soil-pressing screw 3, in the process of applying external force to the shell of the speed reducing motor 1, the self-tapping soil-pressing screw 3 intermittently downwards and intermittently presses soil, and the backfill screw 4 continuously pushes the soil below the soil-pressing disc 2 to the central position of the soil-pressing disc 2; by switching the operation positions, the soil bodies in all the areas are tamped.
Because the backfill screw rod 4 and the soil pressing disc 2 rotate synchronously and rotate occasionally, the soil in the whole circular area below the soil pressing disc 2 can be acted by the backfill screw rod 4, and the soil is tightly pressed into a deeper soil layer, so that the soil body tamping effect is better.
Because this ramming earth device need not great external force and applys, also need not to make whole ramming earth device carry out the punching press to the soil layer, still do not have the vibration, make the noise little, the energy consumption is little, can hand-held operation. In addition, the self-tapping soil-compacting screw rod 3 enters the deep layer of the soil body by the soil-compacting device in a self-tapping mode and extrudes deep soil, while the traditional soil-compacting device can also loosen partial surface soil in the process of compacting the soil body, and the ramming device has good soil-compacting effect because of no use, and can be even used for manufacturing a soil-compacting wall, slope compacting and slope reinforcement.
A plurality of ramming devices are arranged on a movable arm of the excavator, each ramming device is horizontally distributed on the same straight line, and the ramming devices are connected with the excavator in the following mode: fixing an installation plate 14 parallel to the horizontal plane at the tail end of a movable arm of the excavator, fixing a shell of a speed reducing motor 1 of each ramming device on the installation plate 14, and ramming the side slope under the condition that a self-tapping soil-compacting screw rod 3 is vertical to the side slope; translating the mounting plate 14 from the lower position to the higher position of the side slope to finish tamping most of the area of the side slope; tamping the slope special-shaped area and the corner position is realized by adjusting the inclination angle of the mounting plate 14 and the horizontal plane or reducing the number of tamping devices on the mounting plate 14.
Because of the forced guiding function of the backfilling screw rod 4 to the soil, the landslide flow of the soil in the operation process can be greatly reduced in the side slope tamping operation process, and the self-tapping soil-pressing screw rod 3 is used for compacting the soil body at a deeper position away from the surface of the side slope, so that the problems of side slope appearance change, soil body collapse and the like can be avoided; moreover, because the ramming device does not need large external force, can enter the soil layer through self tapping of the self-tapping soil-pressing screw rods 3 and generates large extrusion force on the soil body, a plurality of ramming devices can be simultaneously installed on one excavator, the efficiency is improved, the side turning and the backward turning of the excavator can not be caused, and the construction is safe and efficient.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (9)
1. A method for tamping a side slope soil body is characterized in that a plurality of soil tamping devices are utilized, the soil tamping devices comprise a speed reducing motor (1), a soil pressing disc (2), a self-tapping soil pressing screw rod (3) and a plurality of backfilling screw rods (4), a connecting shaft (5) is fixedly arranged between the output shaft of the speed reducing motor (1) and the self-tapping soil-compacting screw (3), the soil compacting disc (2) is connected on the connecting shaft (5) through a spline, each backfilling screw (4) is uniformly arranged on the lower side surface of the soil compacting disc (2) in the circumferential direction, the backfill screw rod (4) is rotationally connected to a mounting disc (6), the mounting disc (6) is rotationally connected to the outer edge of the soil compacting disc (2), a gear (7) is fixedly arranged at the outer end of the backfill screw (4), and a transmission gear ring (8) meshed with each gear (7) is arranged on the soil compacting disc (2); the inner end of the backfill screw rod (4) is positioned at the outer side of the upper end of the self-tapping soil-compacting screw rod (3);
the method comprises the following steps of arranging a plurality of ramming devices on a movable arm of an excavator, wherein the ramming devices are horizontally distributed on the same straight line, and the ramming devices are connected with the excavator in the following mode: fixing an installation plate (14) parallel to the horizontal plane at the tail end of a movable arm of the excavator, fixing a shell of a speed reducing motor (1) of each ramming device on the installation plate (14), and ramming the side slope under the condition that a self-tapping soil-compacting screw (3) is vertical to the side slope; translating the mounting plate (14) from the lower position to the higher position of the side slope to finish tamping most of the area of the side slope; tamping the slope special-shaped area and the corner position by adjusting the inclination angle of the mounting plate (14) and the horizontal plane or reducing the number of tamping devices on the mounting plate (14).
2. The method for tamping a slope soil mass according to claim 1, wherein a hand-held frame (9) is fixedly arranged on the housing of the reduction motor (1).
3. The method for tamping a slope soil mass according to claim 1, wherein a mounting flange (10) is provided on the housing of the reduction motor (1).
4. The method for tamping a soil mass on a slope according to claim 1, 2 or 3, wherein the soil compacting plate (2) is longitudinally slidably connected to the connecting shaft (5), and a buffer spring (11) sleeved on the connecting shaft (5) is arranged between the pressing plate and the casing of the speed reducing motor (1).
5. The method for tamping a slope soil mass according to claim 1, 2 or 3, wherein a limiting bushing (12) is fixedly arranged on the connecting shaft (5) below the soil compacting plate (2).
6. A method of tamping a slope body as defined in claim 1, 2 or 3, wherein the axis of said backfill screw (4) is inclined at an angle of from 95 ° to 150 ° to the axis of said self-tapping soil screw (3).
7. A method of tamping a slope soil mass according to claim 1, 2 or 3, wherein said soil compacting plate (2) is in the form of a cone having a lower end diameter smaller than an upper end diameter.
8. The method for tamping a slope soil according to claim 1, 2 or 3, wherein the diameter of the spiral guide plate on the self-tapping soil-compacting screw (3) is gradually reduced from top to bottom; the lower end of the self-tapping soil-compacting screw rod (3) is provided with a positioning plug (13).
9. The method for tamping a slope soil according to claim 1, 2 or 3, wherein the diameter of the spiral guide vanes on the backfilling screw (4) is gradually reduced from outside to inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683666.1A CN113323057B (en) | 2021-06-21 | 2021-06-21 | Tamping method for side slope soil body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110683666.1A CN113323057B (en) | 2021-06-21 | 2021-06-21 | Tamping method for side slope soil body |
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| CN113323057B CN113323057B (en) | 2022-07-26 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011021401A (en) * | 2009-07-16 | 2011-02-03 | Hirose & Co Ltd | Self-drilling anchor and earth and sand ground reinforcement method using the same |
| CN108221933A (en) * | 2018-02-02 | 2018-06-29 | 王新念 | A kind of electromagnetic drive type construction rammer compacter |
| CN210105897U (en) * | 2019-06-06 | 2020-02-21 | 中建筑港集团有限公司 | Throw stone layer stock pore-forming auxiliary device |
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2021
- 2021-06-21 CN CN202110683666.1A patent/CN113323057B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011021401A (en) * | 2009-07-16 | 2011-02-03 | Hirose & Co Ltd | Self-drilling anchor and earth and sand ground reinforcement method using the same |
| CN108221933A (en) * | 2018-02-02 | 2018-06-29 | 王新念 | A kind of electromagnetic drive type construction rammer compacter |
| CN210105897U (en) * | 2019-06-06 | 2020-02-21 | 中建筑港集团有限公司 | Throw stone layer stock pore-forming auxiliary device |
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| CN113323057B (en) | 2022-07-26 |
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