CN111749463A - Adjustable counterweight device for building construction - Google Patents
Adjustable counterweight device for building construction Download PDFInfo
- Publication number
- CN111749463A CN111749463A CN202010646447.1A CN202010646447A CN111749463A CN 111749463 A CN111749463 A CN 111749463A CN 202010646447 A CN202010646447 A CN 202010646447A CN 111749463 A CN111749463 A CN 111749463A
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- CN
- China
- Prior art keywords
- electric switch
- guide chute
- opening
- fixedly connected
- feeding mechanism
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L1/00—Cleaning windows
- A47L1/02—Power-driven machines or devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
- E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
- E04G3/32—Hoisting devices; Safety devices
- E04G3/325—Safety devices for stabilising the mobile platform, e.g. to avoid it swinging in the wind
Abstract
The invention discloses an adjustable counterweight device for building construction, which comprises a bracket, wherein a drainage mechanism is connected onto the bracket, openings are arranged above and below the drainage mechanism, a guide chute is connected to the opening below the drainage mechanism, an electric switch B is arranged at the joint of the drainage mechanism and the guide chute, an electric switch C is arranged at the opening below the guide chute, a sensor is arranged above the electric switch C, a return pipe is also connected to the opening below the guide chute, a return mechanism is arranged below the other end of the return pipe, a feeding mechanism is arranged below the return mechanism, openings are arranged above and below the feeding mechanism, an electric switch E is arranged at the opening below the feeding mechanism, and a flowable substance is contained in the feeding mechanism; the invention aims to solve the problems that the existing construction counter weight is difficult to carry due to large weight, is easy to break in the carrying process, is inconvenient to use, cannot be subjected to stepless adjustment and ensures the precision of the counter weight.
Description
The invention relates to an adjustable counterweight device for building construction and a working method thereof, which is a divisional application of an invention patent with the application number of 2020101639412.
Technical Field
The invention belongs to the field of building construction auxiliary equipment, and particularly relates to an adjustable counterweight device for building construction.
Background
With the continuous development of society and the continuous update of science and technology, the spring shoots of high-rise buildings like the rainy season start to pull out from the ground, and the buildings are in endless, and the construction project is used as the important foundation of the life guarantee of the high-rise buildings, and is more concerned by people.
Traditional counter weight for building outer wall construction, like hanging flower basket counter weight, window cleaning machine counter weight etc. mostly are concrete or cast iron material, therefore weight is great, the transport difficulty, still breaks easily in handling, uses inconveniently to traditional balancing weight can not carry out electrodeless regulation to weight, can't guarantee the counter weight precision.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides an adjustable counter weight device for construction and operating method thereof to solve the problems that the prior counter weight for construction is difficult to carry due to large weight, is easy to break in the carrying process, is inconvenient to use, cannot be adjusted in an infinite way and ensures the precision of the counter weight.
The specific technical scheme of the invention is as follows:
an adjustable counterweight device for building construction comprises a bracket, wherein a drainage mechanism is fixedly connected onto the bracket, openings are respectively arranged above and below the drainage mechanism, a guide chute is fixedly connected to the opening below the drainage mechanism, an electric switch B is arranged at the joint of the drainage mechanism and the guide chute, an opening is arranged below the guide chute, an electric switch C is arranged at the opening below the guide chute, a sensor is arranged above the electric switch C, a return pipe is also fixedly connected to the opening below the guide chute, the joint of the guide chute and the return pipe is positioned above the electric switch C, the guide chute is communicated with the return pipe, a return mechanism is arranged below the other end of the return pipe, a feeding mechanism is arranged below the return mechanism, and openings are respectively arranged above and below the feeding mechanism, an electric switch E is arranged at an opening below the feeding mechanism, and flowable substances are contained in the feeding mechanism.
Preferably, the return tube is helical.
Preferably, the drainage mechanism comprises a shell A, openings are formed in the upper portion and the lower portion of the shell A, a plurality of sliding plates which are obliquely arranged are fixedly connected to the inside of the shell A from top to bottom in sequence, the sliding plates are arranged alternately in the oblique direction from top to bottom, the lower edges of the sliding plates are not connected with the shell A, the openings formed by the sliding plates are blanking ports, and the blanking ports are alternately arranged on the left side and the right side from top to bottom.
Preferably, a strip-shaped hole is formed in the sliding plate located at the lowest position, and an adjusting plate is fixedly connected to the upper portion of the sliding plate through a bolt.
Preferably, the flowable substance contained in the feeding mechanism is sand or steel balls.
Preferably, the sand and steel balls have a diameter of less than 1 mm.
Preferably, a weight box is arranged below the guide chute, a liftable upper cover is arranged above the weight box, a discharge port is arranged below the weight box, a discharge gate is arranged at the discharge port, a traction cable is fixedly connected to the weight box, the other end of the traction cable is fixedly connected to the fixing frame, and a tension sensor is arranged on the traction cable.
Preferably, the backflow mechanism comprises a shell B, openings are formed in the upper portion and the lower portion of the shell B, an electric switch D is arranged at the opening in the lower portion of the shell B, a connecting pipe is fixedly connected to the upper portion of the side wall of the shell B and is communicated with the shell B, an air pump is connected to the other end of the connecting pipe, and a filter screen is further arranged inside the connecting pipe.
A method of operating an adjustable counterweight apparatus for use in building construction as described above, the method comprising the steps of:
A. when the weight box needs to be loaded, a flowable substance is manually added into the feeding mechanism;
B. the electric switch E, the electric switch B and the electric switch C are turned on, the flowable substance flows out of the feeding mechanism and falls onto the sliding plate in the drainage mechanism, the flowable substance slowly slides downwards along the inclined sliding plate, falls onto the next layer of sliding plate from the blanking port and continues to slowly slide downwards, and finally flows out of the lowermost blanking port;
C. the flowable substance flows into the weight box through the material guide groove, so that the weight of the weight box is continuously increased, when the weight of the weight box reaches a preset value, the tension sensor sends signals to the electric switch E and the electric switch C, the electric switch E and the electric switch C are closed, and the flowable substance does not flow out of the material guide groove any more;
D. if the weight of the weight box needs to be increased on the basis, the electric switch D and the electric switch B are closed, the air pump is started, and the flowable substance in the guide chute is discharged into the shell B through the return pipe under the action of the air pump;
E. when the flowable substance in the guide chute is completely discharged, the sensor cannot detect the flowable substance in the guide chute, the sensor transmits a signal to the air pump, the air pump stops running, the electric switch D is turned on, and the flowable substance in the shell B flows into the feeding mechanism;
F. repeating the steps B-C;
G. after the loading of the weight box is finished, the upper cover plate of the weight box is buckled to prevent the flowable substance from flowing out, and the weight box is taken down from the traction cable and placed on a device to be subjected to weight balancing;
H. when the weight box needs to be unloaded, the discharge gate below the weight box is opened, and the flowable material flows out of the discharge port.
The invention has at least the following beneficial effects:
1. according to the technical scheme, the drainage mechanism, the guide chute and the feeding mechanism are arranged, so that the weight of the weight box can be automatically loaded on a construction site, and long-distance transportation is not needed, the problems that the traditional weight block is difficult to transport due to large weight, is easy to break during transportation, is inconvenient to use and the like are solved, meanwhile, the device can also be used for stepless adjustment of the weight box according to the actual construction condition on the site, and is more flexible to use, so that different weight balancing requirements under different construction conditions are met.
2. According to the technical scheme, the plurality of inclined sliding plates are arranged in the drainage mechanism, so that the flowable substance can slowly flow downwards along the slopes of the sliding plates, the flow of the flowable substance is slowly and uniformly changed, the flow of the flowable substance can be adjusted, and the loading precision of the weight box can be guaranteed.
3. According to the technical scheme, the backflow pipe and the backflow mechanism are arranged, so that the residual flowable substance in the guide chute can be cleaned, and the situation that when the weight box is loaded next time, the flowable substance flowing out after the electric switch C is directly turned on is too fast and too much, and the weight precision of the weight box is influenced is prevented.
4. According to the technical scheme, the adjusting plate is of an adjustable structure, and the position of the adjusting plate can be adjusted, so that the size of the bottommost blanking port is adjusted, and the flow of the flowable substance is controlled.
5. According to the technical scheme, the backflow pipe is arranged in a spiral shape, so that the gradient of the pipeline can be reduced, the flowable substance can move upwards along the gentle slope of the spiral pipeline, and the flowable substance can flow back more easily.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
FIG. 4 is a front view of the overall appearance of the present invention;
FIG. 5 is a top view of the overall appearance of the present invention;
in the figure: 1. a support; 2. a drainage mechanism; 21. a shell A; 22. an electric switch B; 23. a slide plate; 24. an adjusting plate; 25. a blanking port; 26. an observation window; 3. a material guide chute; 31. an electric switch C; 32. a sensor B; 4. a return pipe; 5. a reflux mechanism; 51. a housing B; 52. an electric switch D; 53. a connecting pipe; 54. an air pump; 55. a filter screen; 6. a feeding mechanism; 61. an electric switch E; 7. a weight box; 8. a traction cable; 9. a tension sensor.
Detailed Description
The technical scheme of the invention provides an adjustable counterweight device for building construction and a working method thereof, and the technical scheme of the invention is described in detail by combining the accompanying drawings and an embodiment:
the invention discloses an adjustable counterweight device for building construction and a working method thereof, as shown in figures 1 and 2, the adjustable counterweight device comprises a support 1, a drainage mechanism 2 is fixedly connected on the support 1, openings are respectively arranged above and below the drainage mechanism 2, a guide chute 3 is fixedly connected at the opening below the drainage mechanism 2, an electric switch B22 is arranged at the joint of the drainage mechanism 2 and the guide chute 3, an opening is arranged below the guide chute 3, an electric switch C31 is arranged at the opening below the guide chute 3, a sensor 32 is arranged above an electric switch C31, a return pipe 4 is also fixedly connected at the opening below the guide chute 3, the return pipe 4 is spiral, the joint of the guide chute 3 and the return pipe 4 is positioned above the electric switch C31, the guide chute 3 is communicated with the return pipe 4, a return mechanism 5 is arranged below the other end of the return pipe 4, the backflow device is characterized in that a feeding mechanism 6 is arranged below the backflow mechanism 5, openings are formed in the upper portion and the lower portion of the feeding mechanism 6, an electric switch E61 is arranged at the opening of the lower portion of the feeding mechanism 6, the opening of the lower portion of the feeding mechanism 6 is located above the drainage mechanism 2, a flowable substance is contained in the feeding mechanism 6, the flowable substance is sand grains or steel balls, and the diameter of the sand grains or the steel balls is smaller than 1 mm.
Specifically, drainage mechanism 2 is as shown in fig. 3, fig. 4, including casing a21, casing a 21's top and below all are provided with the opening, casing a 21's inside is from last to the slide 23 that a plurality of slopes of fixedly connected with set up down in proper order, each slide 23's incline direction top-down sets up in turn, do not throw out between the lower border of slide 23 and casing a21, its opening that forms is blanking mouth 25, and each blanking mouth 25 top-down divides in turn arranges left and right sides in, has been located the bar hole of having seted up on the slide 23 of below, and bolt fixedly connected with regulating plate 24 is passed through to this slide 23's top, observation window 26 has been seted up to the position that corresponds regulating plate 24 on casing a21, install the observation door on the observation window 26, the operator's accessible stretches into observation window 26 with both hands inside regulation plate 24. The position of the adjusting plate 24 can be adjusted by moving the position of the bolt in the strip-shaped hole, so that the size of the lowermost blanking port 25 can be adjusted.
Specifically, return mechanism 5 is as shown in fig. 2, including casing B51, casing B51's top and below all are provided with the opening, casing B51's below opening part is provided with electric switch D52, casing B51's lateral wall top fixedly connected with connecting pipe 53, connecting pipe 53 communicates with each other with casing B51, the other end of connecting pipe 53 is connected with air pump 54, the inside of connecting pipe 53 still is provided with filter screen 55, filter screen 55 prevents that the flowable substance in return mechanism 5 from being sucked out by air pump 54.
Specifically, this application the device is when using, as shown in fig. 4, as 5, the below of baffle box 3 is provided with weight box 7, weight box 7 top is provided with the upper cover that can lift open, and the below is provided with the bin outlet, bin outlet department is provided with the bin gate, fixedly connected with haulage cable 8 on the weight box 7, the other end fixed connection of haulage cable 8 is on the mount, install tension sensor 9 on the haulage cable 8. When the weight box 7 needs to be loaded, the feeding mechanism 6 and the drainage mechanism 2 are started, the flowable substance is input into the weight box 7, when the weight of the weight box 7 reaches a preset value, the tension sensor 9 sends out a signal, the feeding mechanism 6 and the drainage mechanism 2 stop inputting the flowable substance into the weight box 7, and the weight box 7 exerts a balance force on a device needing balance weight by means of the weight box.
The adjustable counterweight device for building construction is not only applied to applying the counterweight to the building construction device, but also applied to all occasions needing to apply the counterweight.
When in use, the specific working process of the embodiment of the invention is as follows:
when the weight box 7 needs to be loaded, the flowable substance is manually added into the feeding mechanism 6. The electric switch E61, the electric switch B22 and the electric switch C31 are turned on, the flowable substance flows out from the feeding mechanism 6 and falls onto the sliding plate 23 in the drainage mechanism 2, the flowable substance slowly slides downwards along the inclined sliding plate 23, falls onto the sliding plate 23 on the next layer from the blanking port 25 and continues to slowly slide downwards, finally flows out from the blanking port 25 at the lowest part, and the flowable substance can finally slowly and uniformly flow out by sliding on the sliding plates 23 on a plurality of layers, so that the precision adjustment is facilitated.
The flowable substance flows into the weight box 7 through the material guide chute 3, so that the weight of the weight box 7 is increased continuously, when the weight of the weight box 7 reaches a preset value, the tension sensor 9 sends signals to the electric switch E61 and the electric switch C31, the electric switch E61 and the electric switch C31 are turned off, and the flowable substance does not flow out of the material guide chute 3 any more.
If it is necessary to increase the weight of the weight box 7 based on this, in order to prevent the weight accuracy of the weight box 7 from being affected by excessive speed of the flowable material discharged after the electric switch C31 is directly turned on, the flowable material in the material guide chute 3 needs to be discharged first. The electric switch D52 and the electric switch B22 are closed, the air pump 54 is started, the flowable substance in the guide chute 3 is discharged into the shell B51 through the return pipe 4 under the action of the air pump 54, and in order to prevent the guide chute 3 and the return pipe 4 from generating a vacuum state, a certain gap is left in an opening above the guide chute 3 after the electric switch B22 is closed, so that the guide chute 3 is communicated with the shell A21.
When the flowable material in the material guide chute 3 is completely discharged, the sensor B32 cannot detect the flowable material in the material guide chute 3, the sensor 32 transmits a signal to the air pump 54, the air pump 54 stops operating, the electric switch D52 is turned on, and the flowable material in the housing B51 flows into the feeding mechanism 6.
And repeating the steps to load the weight box 7.
After the loading of the weight box 7 is finished, the upper cover plate of the weight box 7 is buckled to prevent the flowable substance from flowing out, and the weight box 7 is taken down from the traction cable 8 and placed on a device to be weighted.
When it is desired to unload the weight box 7, the discharge gate below the weight box 7 is opened and the flowable material flows out of the discharge gate.
The words of front, back, left, right, up and down, etc. in the present invention are only for convenience of describing the structure and do not form a limitation on the technical solution. While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (4)
1. The utility model provides an adjustable counter weight device for construction which characterized in that: comprises a bracket (1), a drainage mechanism (2) is fixedly connected to the bracket (1), openings are arranged above and below the drainage mechanism (2), a guide chute (3) is fixedly connected to the opening below the drainage mechanism (2), an electric switch B (22) is arranged at the joint of the drainage mechanism (2) and the guide chute (3), an opening is arranged below the guide chute (3), an electric switch C (31) is arranged at the opening below the guide chute (3), a sensor (32) is arranged above the electric switch C (31), a return pipe (4) is also fixedly connected to the opening below the guide chute (3), the joint of the guide chute (3) and the return pipe (4) is positioned above the electric switch C (31), the guide chute (3) is communicated with the return pipe (4), a return mechanism (5) is arranged below the other end of the return pipe (4), a feeding mechanism (6) is arranged below the backflow mechanism (5), openings are formed in the upper portion and the lower portion of the feeding mechanism (6), an electric switch E (61) is arranged at the opening in the lower portion of the feeding mechanism (6), and flowable substances are contained in the feeding mechanism (6);
the return pipe (4) is spiral;
the drainage mechanism (2) comprises a shell A (21), openings are formed in the upper portion and the lower portion of the shell A (21), a plurality of sliding plates (23) which are obliquely arranged are fixedly connected to the inside of the shell A (21) from top to bottom in sequence, the oblique directions of the sliding plates (23) are alternately arranged from top to bottom, the lower edge of each sliding plate (23) is not connected with the shell A (21), the opening formed by the sliding plates is a blanking port (25), and the blanking ports (25) are alternately arranged on the left side and the right side from top to bottom;
a strip-shaped hole is formed in the sliding plate (23) positioned at the lowest part, and an adjusting plate (24) is fixedly connected above the sliding plate (23) through a bolt;
the flowable substance contained in the feeding mechanism (6) is sand or steel balls.
2. An adjustable counterweight device for use in building construction as defined in claim 1, wherein: the diameter of the sand grains and the steel balls is less than 1 mm.
3. An adjustable counterweight device for use in building construction as defined in claim 1, wherein: the utility model discloses a drawing device, including baffle box (3), weight box (7) top is provided with the upper cover that can open, and the below is provided with the bin outlet, bin outlet department is provided with the bin gate, fixedly connected with haulage cable (8) on weight box (7), the other end fixed connection of haulage cable (8) is on the mount, install tension sensor (9) on haulage cable (8).
4. An adjustable counterweight device for use in building construction according to any one of claims 1 to 3, wherein: backflow mechanism (5) include casing B (51), the top and the below of casing B (51) all are provided with the opening, the below opening part of casing B (51) is provided with electric switch D (52), lateral wall top fixedly connected with connecting pipe (53) of casing B (51), connecting pipe (53) communicate with each other with casing B (51), the other end of connecting pipe (53) is connected with air pump (54), the inside of connecting pipe (53) still is provided with filter screen (55).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010646447.1A CN111749463B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010163941.2A CN111005566B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction and working method thereof |
| CN202010646447.1A CN111749463B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010163941.2A Division CN111005566B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction and working method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN111749463A true CN111749463A (en) | 2020-10-09 |
| CN111749463B CN111749463B (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010163941.2A Active CN111005566B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction and working method thereof |
| CN202010646447.1A Active CN111749463B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010163941.2A Active CN111005566B (en) | 2020-03-11 | 2020-03-11 | Adjustable counterweight device for building construction and working method thereof |
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| US5203837A (en) * | 1991-10-25 | 1993-04-20 | Bosko Madic | Balanced lifting crane |
| CN2793032Y (en) * | 2005-03-17 | 2006-07-05 | 辽宁工程技术大学 | Adjustable counterweight tower shaped crane |
| CN201857227U (en) * | 2010-03-16 | 2011-06-08 | 张兴汉 | Tower crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ES2377892B1 (en) * | 2010-09-07 | 2013-01-08 | D-3 Ingeniería Y Desarollo S.L. | HIGH DENSITY COUNTERWEIGHT. |
| CN202625576U (en) * | 2011-12-14 | 2012-12-26 | 煤炭工业合肥设计研究院 | Auxiliary container of movable weight balancing hammer |
| CN205617812U (en) * | 2016-05-09 | 2016-10-05 | 重庆工程职业技术学院 | Take lower hopper of flow control device |
| CN206299095U (en) * | 2016-12-21 | 2017-07-04 | 安徽山水空间装饰有限责任公司 | A kind of paint cylinder of automatic charging and feed back |
| JP6542309B2 (en) * | 2017-08-18 | 2019-07-10 | 三菱電機ビルテクノサービス株式会社 | Balance weight of elevator |
| CN207888897U (en) * | 2017-12-22 | 2018-09-21 | 新昌县鼎绑机电有限公司 | A kind of cement hopper facilitating screening impurity |
| CN208218151U (en) * | 2018-03-08 | 2018-12-11 | 浙江虎霸建设机械有限公司 | A kind of novel architecture elevator |
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2020
- 2020-03-11 CN CN202010163941.2A patent/CN111005566B/en active Active
- 2020-03-11 CN CN202010646447.1A patent/CN111749463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203837A (en) * | 1991-10-25 | 1993-04-20 | Bosko Madic | Balanced lifting crane |
| CN2793032Y (en) * | 2005-03-17 | 2006-07-05 | 辽宁工程技术大学 | Adjustable counterweight tower shaped crane |
| CN201857227U (en) * | 2010-03-16 | 2011-06-08 | 张兴汉 | Tower crane |
| CN109184175A (en) * | 2018-10-08 | 2019-01-11 | 渠衍飞 | A kind of construction suspension platform and suspention auxiliary device |
| CN209582862U (en) * | 2018-12-27 | 2019-11-05 | 江苏华宏科技股份有限公司 | It is a kind of it is novel can storing and sub-material apron quantitive conveyor structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111005566A (en) | 2020-04-14 |
| CN111749463B (en) | 2021-12-14 |
| CN111005566B (en) | 2020-08-04 |
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