CN112371668A - Scrubbing device for environmental design - Google Patents
Scrubbing device for environmental design Download PDFInfo
- Publication number
- CN112371668A CN112371668A CN202011127392.XA CN202011127392A CN112371668A CN 112371668 A CN112371668 A CN 112371668A CN 202011127392 A CN202011127392 A CN 202011127392A CN 112371668 A CN112371668 A CN 112371668A
- Authority
- CN
- China
- Prior art keywords
- rod
- motor
- brush
- scissor
- electric telescopic
- 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.)
- Granted
Links
- 230000007613 environmental effect Effects 0.000 title claims abstract description 19
- 238000005201 scrubbing Methods 0.000 title claims description 3
- 238000009434 installation Methods 0.000 claims abstract description 15
- 238000005202 decontamination Methods 0.000 claims abstract description 12
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims 4
- 231100000719 pollutant Toxicity 0.000 claims 4
- 239000010865 sewage Substances 0.000 description 14
- 238000004140 cleaning Methods 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
- B08B9/051—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled
- B08B9/0495—Nozzles propelled by fluid jets
- B08B9/0497—Nozzles propelled by fluid jets provided with additional mechanical cleaning tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a decontamination device for environmental design, which comprises an installation box; the first motor is arranged in the installation box, and an output shaft of the first motor extends out of the installation box; the rod body I is coaxially connected with an output shaft of the motor I; the sleeve is sleeved on the first rod body and can move on the first rod body; one end of the cylinder body is coaxially connected with one end of the rod body I, which is far away from the motor I, and the other end of the cylinder body is provided with a brush body I; the four support rods form two groups of scissor-type support structures which are respectively symmetrically arranged on two sides of the barrel body, and one end of each scissor-type support structure is respectively hinged with the barrel body and the sleeve; the two brush bodies II are respectively positioned on one side of the scissor-type supporting structure away from the barrel body, and are respectively hinged with the scissor-type supporting structure adjacent to the two brush bodies II; the two electric telescopic rods I are symmetrically arranged on two sides of the barrel respectively and located below the scissor-type supporting structure, one end of each electric telescopic rod I is hinged to the barrel, and the other end of each electric telescopic rod I is hinged to the supporting rod. The invention can quickly remove blockage, and improves the safety and traffic reliability of travel.
Description
Technical Field
The invention belongs to the technical field of decontamination of environmental design, and particularly relates to a decontamination device for environmental design.
Background
Environmental design contains multiple aspects, like the beautification of environment, the overall arrangement of water and electricity heating, the afforestation of plant, sewage pipes's design etc. and conventional sewage pipes does not set up any stifled device of dredging usually, consequently, often can use after a period, the blowdown effect variation, and is serious even, and the jam can block up the pipeline for sewage flows down, causes the drain road surface to return water, seriously influences safety and current reliability.
Disclosure of Invention
In view of the above, the present invention provides a decontamination device for environmental design, so as to solve the deficiencies of the prior art.
The technical scheme of the invention is as follows:
an environmental design decontamination device, comprising:
installing a box;
the first motor is arranged in the installation box, and an output shaft of the first motor extends out of the installation box;
the first rod body is coaxially connected with an output shaft of the first motor;
the sleeve is sleeved on the first rod body and can move on the first rod body;
one end of the cylinder body is coaxially connected with one end of the rod body I, which is far away from the motor I, and the other end of the cylinder body is provided with a brush body I;
the four support rods form two groups of scissor-type support structures which are respectively symmetrically arranged on two sides of the barrel body, and one end of each scissor-type support structure is hinged with the barrel body and the sleeve;
two brush bodies are respectively positioned on one side of the scissor-type supporting structure far away from the barrel body, and the two brush bodies are respectively hinged with the scissor-type supporting structure close to the two brush bodies;
the electric telescopic rod I is provided with two numbers, the two numbers are symmetrically arranged on two sides of the barrel body respectively and located below the scissor-type supporting structure, one end of the electric telescopic rod I is hinged to the barrel body, and the other end of the electric telescopic rod I is hinged to the supporting rod.
Preferably, the first brush body comprises a first base body, a cavity is formed in the first base body, a threaded hole used for being connected with the barrel is formed in one side of the cavity, a special-shaped through groove is formed in one side of the first base body opposite to the threaded hole, and a plurality of first brushes vertical to the first base body are arranged on the periphery of the first base body.
Preferably, the brush body II comprises a base body II, a plurality of brush bodies II vertical to the base body II are arranged on one side surface of the base body II, and the brush bodies II and the brush bodies have the same structure.
Preferably, the second brush comprises a second hollow rod body, and bristles are arranged on the second rod body; a water supply pipe communicated with an external pressure pump is embedded in the second seat body, the water supply pipe is communicated with the second rod body, and a plurality of through holes for spraying water are further formed in the second rod body.
Preferably, a second motor is further fixed in the barrel, an output shaft of the second motor is horizontally arranged on one side close to the first brush body, the output shaft of the second motor is connected with one end of a second electric telescopic rod, and a cutting head for crushing blockages is arranged at the other end of the second electric telescopic rod.
Preferably, the cutting head comprises a drill rod detachably connected with the second electric telescopic rod, and a drill head part is coaxially fixed at one end of the drill rod, which is far away from the second electric telescopic rod.
Preferably, the drill rod is provided with a plurality of blind holes, the inner bottom surface of each blind hole is fixedly connected with one end of the elastic piece, and the other end of the elastic piece is fixedly connected with the cutter head.
Preferably, one side of the installation box, which is far away from the first brush body, is provided with a connection structure connected with an external device and a hanging ring convenient to hoist.
Compared with the prior art, the decontamination device for environmental design provided by the invention is used, the mounting box is fixed at one end of the extension rod through a screw, then the device is placed into a section to be cleaned in a sewage discharge pipeline by the extension rod, the two electric telescopic rods I are synchronously started to synchronously shorten the length of the two electric telescopic rods I, the sleeve is driven to slowly move along the rod body towards the cylinder body, the height of the scissor-shaped structure formed by the two support rods is gradually increased, the distance between the two brush bodies II which are oppositely arranged is also gradually increased, after the two brush bodies II are respectively contacted with the inner wall of the sewage discharge pipeline, the two electric telescopic rods I are closed, the motor I is started, the motor I drives the rod body I, the cylinder body at the tail end of the rod body I, the brush body I at the tail end of the cylinder body, the scissor-shaped structure on the outer wall of the cylinder body and the brush body II at the end of the scissor, the first brush body and the second brush body rotate to form a brushing and cleaning action on the interior of the sewage pipeline, water after pressurization can be introduced into the second brush body, and the pressurized water forms a flushing action on dirt in the sewage pipeline, so that the cleaning is quicker and more thorough. When the blockage in the sewage discharge pipeline is serious, the second electric telescopic rod can be started, the cutting head extends out through the special-shaped through groove, the second motor is started after the second motor contacts with the blockage, the second motor drives the second electric telescopic rod and the cutting head fixed at the two end parts of the second electric telescopic rod to synchronously rotate, and the blockage is crushed by the cutting head.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of a portion of the structure of the present invention;
FIG. 3 is a schematic structural view of a first brush body according to the present invention;
FIG. 4 is a left side view of a first brush body of the present invention;
FIG. 5 is a schematic structural view of a second brush body according to the present invention.
Detailed Description
The present invention provides a decontamination device for environmental design, and the following description will be made with reference to the schematic structural diagrams of fig. 1 to 5.
Example 1
As shown in fig. 1, the decontamination device for environmental design provided by the invention comprises an installation box 1, wherein a first motor 2 is fixedly connected in the installation box 1, and an output shaft of the first motor 2 horizontally extends out of the installation box 1 and is coaxially connected with a first rod body 3;
the rod body 3 is sleeved with a sleeve 4 which can move on the rod body 3.
One end of the rod body I3, which is far away from the motor I2, is coaxially connected with one end of the cylinder body 13, and the other end of the cylinder body 13 is detachably connected with a brush body I7.
Further, as shown in fig. 3 and 4, the brush body i 7 includes a base body i 701, a cavity 702 is formed in the base body i 701, a threaded hole 703 for connecting with the cylinder body 13 is formed in one side of the cavity 702, and a plurality of brush bodies 704 vertical to the base body i 701 are disposed around the base body i 701.
Two sets of scissors type bearing structures used for height adjustment are symmetrically arranged on two sides of the barrel body 13, each scissors type bearing structure comprises four supporting rods 5, each scissors type structure is formed by two supporting rods 5, one end of each scissors type structure is hinged to the barrel body 13 and the sleeve 4, the other end of each scissors type structure is hinged to the brush body II 6, and the brush body II 6 is provided with two scissors type bearing structures which are located on one side, away from the barrel body 13, of each scissors type bearing structure.
The two electric telescopic rods I14 are symmetrically arranged on two sides of the barrel body 13 respectively and located below the scissor-type supporting structure, one end of each electric telescopic rod I14 is hinged to the barrel body 13, and the other end of each electric telescopic rod I is hinged to the supporting rod 5.
As shown in fig. 5, the second brush body 6 includes a second base 601, a plurality of second brushes 602 vertical to the second base 601 are disposed on one side of the second base 601, and the second brushes 602 have the same structure as the first brushes 704.
Further, the second brush 602 comprises a second hollow rod body, and bristles are arranged on the second rod body; a water supply pipe communicated with an external pressure pump is embedded in the second base body 601, the water supply pipe is communicated with the second rod body, and a plurality of through holes for water to spray are formed in the second rod body, so that the pressurized water can flow out for high-pressure washing conveniently.
Furthermore, one side of the installation box 1, which is far away from the first brush body 7, is provided with a connection structure connected with an external device and a hanging ring convenient to hoist.
Wherein, the connection structure who is connected with external device is a plurality of threaded connection holes of equipartition setting on the outer circumference of install bin 1, and threaded connection hole is used for wearing to establish screw or bolt.
When the invention is used, the installation box 1 is fixed at one end of the extension rod through a screw, then the device is placed into a section to be cleaned in a sewage discharge pipeline by using the extension rod, the two electric telescopic rods 14 are synchronously started to enable the lengths of the two electric telescopic rods 14 to be synchronously shortened, the sleeve 4 is driven to slowly move along the rod body 3 to the direction of the cylinder body 13, the height of the scissor-shaped structure formed by the two support rods 5 is gradually increased, the distance between the two oppositely arranged brush bodies 6 is also gradually increased, after the two brush bodies 6 are respectively contacted with the inner wall of the sewage discharge pipeline, the two electric telescopic rods 14 are closed, the motor 2 is started, the motor 2 drives the rod body 3, the cylinder body 13 at the tail end of the rod body 3, the brush body 7 at the tail end of the cylinder body 13, the scissor-shaped structure on the outer wall of the cylinder body 13 and the brush body 6 at the end of the scissor-shaped structure to, the brush body I7 and the two brush bodies II 6 rotate to form a brushing and cleaning action on the interior of the sewage discharge pipeline, water after pressurization can be introduced into the brush bodies II 6, and the pressurized water forms a flushing action on dirt in the sewage discharge pipeline, so that the cleaning is quicker and more thorough.
Example 2
As a further optimization scheme based on the embodiment 1, in order to dredge the blockage on the premise of tight blockage of the sewage discharge pipeline, the structure of the invention is improved as follows:
a second motor 12 is further fixed in the barrel 13, an output shaft of the second motor 12 is horizontally arranged on one side close to the first brush body 7, the output shaft of the second motor 12 is connected with one end of a second electric telescopic rod 11, a cutting head 8 for crushing blockages is arranged at the other end of the second electric telescopic rod 11, and a special-shaped through groove 705 convenient for the cutting head 8 to extend out is formed in one side of the first base body 701 opposite to the threaded hole 703.
When the blockage in the sewage discharge pipeline is serious, the electric telescopic rod II 11 can be started, the cutting head 8 extends out through the special-shaped through groove 705 and can preferably directly contact with the blockage, then the motor II 12 is started, the motor II 12 drives the electric telescopic rod II 11 and the cutting head 8 fixed at the end part of the electric telescopic rod II 11 to synchronously rotate, and the blockage is crushed by the cutting head 8.
Further, as shown in fig. 2, the cutting head 8 comprises a drill rod 802 detachably connected to the electric telescopic rod 11, and a drill head 801 is coaxially fixed at one end of the drill rod 802 away from the electric telescopic rod 11.
Wherein the drill rod 802 on the cutting head 8 is used for realizing the detachable connection with the end part of the electric telescopic rod 11, and the connection is preferably a threaded connection.
Further, as shown in fig. 2, a plurality of blind holes are formed in the drill rod 802, the inner bottom surface of each blind hole is fixedly connected with one end of the elastic member 9, and the other end of the elastic member 9 is fixedly connected with the tool bit 10.
Wherein the elastic member 9 is a spring.
When the second motor 12 drives the cutting head 8 to synchronously rotate, the cutter head 10 fixed at the tail end of the spring is thrown out of the blind hole to form an area with a larger cutting range, and the cutter heads 10 are combined with the drill head part 801, so that the efficiency of blockage crushing and blockage dredging work is improved.
The decontamination device for environmental design provided by the invention can quickly remove blockage, improves the safety and traffic reliability of travel, has strong practicability and is worthy of popularization.
The above disclosure is only for the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (8)
1. The utility model provides a scrubbing device for environmental design which characterized in that includes:
an installation case (1);
the motor I (2) is arranged in the installation box (1), and an output shaft of the motor I (2) extends out of the installation box (1);
the rod body I (3) is coaxially connected with an output shaft of the motor I (2);
the sleeve (4) is sleeved on the first rod body (3) and can move on the first rod body (3);
one end of the cylinder body (13) is coaxially connected with one end of the rod body I (3) far away from the motor I (2), and the other end of the cylinder body is provided with a brush body I (7);
the four support rods (5) form two groups of scissor-type support structures which are respectively symmetrically arranged on two sides of the cylinder body (13), and one end of each scissor-type support structure is respectively hinged with the cylinder body (13) and the sleeve (4);
two brush bodies II (6) are respectively positioned on one side of the scissor-type supporting structure far away from the cylinder body (13), and the two brush bodies II (6) are respectively hinged with the scissor-type supporting structures adjacent to the two brush bodies II;
electric telescopic handle (14), quantity is two, and the symmetry sets up respectively the both sides of barrel (13), and be located cut fork type bearing structure's below, one of them one end of electric telescopic handle (14) with barrel (13) are articulated, and other one end is articulated with branch (5).
2. The pollutant removal device for environmental design according to claim 1, wherein the first brush body (7) comprises a first base body (701), a cavity (702) is formed in the first base body (701), a threaded hole (703) for connecting the cylinder (13) is formed in one side of the cavity (702), a special-shaped through groove (705) is formed in the side of the first base body (701) opposite to the threaded hole (703), and a plurality of first brushes (704) vertical to the first base body (701) are arranged on the periphery of the first base body (701).
3. The pollutant removing device for environmental design according to claim 2, wherein the second brush body (6) comprises a second base body (601), one side surface of the second base body (601) is provided with a plurality of second brushes (602) which are vertical to the second base body (601), and the second brushes (602) and the first brushes (704) have the same structure.
4. The pollutant removal device for environmental design according to claim 3, wherein the second brush (602) comprises a second hollow rod body, and bristles are arranged on the second rod body; a water supply pipe communicated with an external pressure pump is embedded in the second base body (601), the water supply pipe is communicated with the second rod body, and a plurality of through holes for spraying water are formed in the second rod body.
5. The pollutant removal device for environmental design according to claim 1, wherein a second motor (12) is further fixed in the cylinder (13), an output shaft of the second motor (12) is horizontally arranged at one side close to the first brush body (7), the output shaft of the second motor (12) is connected with one end of a second electric telescopic rod (11), and a cutting head (8) for breaking up the blockage is arranged at the other end of the second electric telescopic rod (11).
6. The environmentally designed decontamination device according to claim 5, wherein the cutting head (8) comprises a drill rod (802) detachably connected to the second electrical telescopic rod (11), and a drill head (801) is coaxially fixed to an end of the drill rod (802) facing away from the second electrical telescopic rod (11).
7. The decontamination device for environmental design according to claim 6, wherein the drill rod (802) is provided with a plurality of blind holes, the inner bottom surface of each blind hole is fixedly connected with one end of the elastic member (9), and the other end of the elastic member (9) is fixedly connected with the tool bit (10).
8. The decontamination device for environmental design according to claim 1, wherein a connection structure connected with an external device and a hanging ring convenient for hoisting are arranged on one side of the installation box (1) away from the first brush body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011127392.XA CN112371668B (en) | 2020-10-20 | 2020-10-20 | Scrubbing device for environmental design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011127392.XA CN112371668B (en) | 2020-10-20 | 2020-10-20 | Scrubbing device for environmental design |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112371668A true CN112371668A (en) | 2021-02-19 |
| CN112371668B CN112371668B (en) | 2021-11-05 |
Family
ID=74580251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011127392.XA Expired - Fee Related CN112371668B (en) | 2020-10-20 | 2020-10-20 | Scrubbing device for environmental design |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112371668B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000521A (en) * | 2021-04-30 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Cleaning device |
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| CN204583806U (en) * | 2015-02-03 | 2015-08-26 | 成都大漠石油机械有限公司 | A kind of petroleum pipeline decontamination apparatus |
| CN105032866A (en) * | 2015-08-31 | 2015-11-11 | 太仓百诺纳米科技有限公司 | Anti-blocking device for underwater pipe opening |
| CN106001023A (en) * | 2016-05-25 | 2016-10-12 | 安徽普氏生态环境工程有限公司 | Petroleum pipeline cleaning device |
| CN206016187U (en) * | 2016-08-25 | 2017-03-15 | 无锡市东北塘永丰橡塑厂 | A kind of rotary retractable putty knife |
| CN107470280A (en) * | 2017-08-04 | 2017-12-15 | 成都兆丰斯诺科技有限公司 | A kind of cleaning device for inner wall of pipeline |
| CN207756577U (en) * | 2017-12-14 | 2018-08-24 | 张志勇 | A kind of petroleum pipeline dredger |
| CN208261458U (en) * | 2018-03-06 | 2018-12-21 | 程洪涛 | A kind of water supply line cleaning plant |
| CN208450121U (en) * | 2018-05-24 | 2019-02-01 | 宜昌华康建设有限公司 | A kind of concrete duct cleaner |
| CN110586587A (en) * | 2019-09-04 | 2019-12-20 | 珠海恒基达鑫国际化工仓储股份有限公司 | Pipe sweeping device and sweeping system |
| CN210592797U (en) * | 2019-09-30 | 2020-05-22 | 桐乡中欣化纤有限公司 | Film breaking device of winding machine |
-
2020
- 2020-10-20 CN CN202011127392.XA patent/CN112371668B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204583806U (en) * | 2015-02-03 | 2015-08-26 | 成都大漠石油机械有限公司 | A kind of petroleum pipeline decontamination apparatus |
| CN105032866A (en) * | 2015-08-31 | 2015-11-11 | 太仓百诺纳米科技有限公司 | Anti-blocking device for underwater pipe opening |
| CN106001023A (en) * | 2016-05-25 | 2016-10-12 | 安徽普氏生态环境工程有限公司 | Petroleum pipeline cleaning device |
| CN206016187U (en) * | 2016-08-25 | 2017-03-15 | 无锡市东北塘永丰橡塑厂 | A kind of rotary retractable putty knife |
| CN107470280A (en) * | 2017-08-04 | 2017-12-15 | 成都兆丰斯诺科技有限公司 | A kind of cleaning device for inner wall of pipeline |
| CN207756577U (en) * | 2017-12-14 | 2018-08-24 | 张志勇 | A kind of petroleum pipeline dredger |
| CN208261458U (en) * | 2018-03-06 | 2018-12-21 | 程洪涛 | A kind of water supply line cleaning plant |
| CN208450121U (en) * | 2018-05-24 | 2019-02-01 | 宜昌华康建设有限公司 | A kind of concrete duct cleaner |
| CN110586587A (en) * | 2019-09-04 | 2019-12-20 | 珠海恒基达鑫国际化工仓储股份有限公司 | Pipe sweeping device and sweeping system |
| CN210592797U (en) * | 2019-09-30 | 2020-05-22 | 桐乡中欣化纤有限公司 | Film breaking device of winding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113000521A (en) * | 2021-04-30 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Cleaning device |
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| Publication number | Publication date |
|---|---|
| CN112371668B (en) | 2021-11-05 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Niu Lina Inventor after: Du Hang Inventor after: Sheng Zhuoli Inventor before: Du Hang |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211105 |