CN210278370U - Sedimentation tank for sludge treatment - Google Patents
Sedimentation tank for sludge treatment Download PDFInfo
- Publication number
- CN210278370U CN210278370U CN201920716863.7U CN201920716863U CN210278370U CN 210278370 U CN210278370 U CN 210278370U CN 201920716863 U CN201920716863 U CN 201920716863U CN 210278370 U CN210278370 U CN 210278370U
- Authority
- CN
- China
- Prior art keywords
- mud
- arc
- rotating shaft
- sludge
- cutting knife
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a sludge treatment sedimentation tank, which technically characterized in that the sludge treatment sedimentation tank comprises a tank body and a sludge scraping device arranged in the tank body, wherein a sludge collecting groove is arranged at the center of the bottom of the tank body, the sludge scraping device comprises a driving component arranged above the center of the tank body, a rotating shaft connected to the bottom of the driving component, a base arranged at the bottom of the sludge collecting groove and used for bearing the rotating shaft, and a sludge scraping component arranged on the radial outer side of the rotating shaft, the upper end and the lower end of the rotating shaft are respectively provided with a fixed block fixed on the rotating shaft in a penetrating way, the sludge scraping component comprises two symmetrical arc frames, a sludge scraping plate fixedly connected to the bottom of the arc frames and a sludge cutter fixedly connected to the bottom of the arc frames, the inner side wall of the arc frames is horizontally connected to the fixed block, the outer side wall is close to the tank wall of the sedimentation tank, one side of the, the utility model has the advantages of be difficult to realize scraping mud fast when sedimentation tank silt is more.
Description
Technical Field
The utility model relates to a silt processing technology field, more specifically say, it relates to a sedimentation tank is handled to silt.
Background
At present, chinese patent No. CN206152412U discloses a mud scraper. Its technical scheme main points include tractor, floating rod, mud scraper assembly, central support, the tractor with the one end of floating rod is connected, the other end of floating rod with the central support is connected, the central support is fixed on the center pillar, the vertical central point that is fixed in the silt sedimentation tank of center pillar puts, the mud scraper assembly is located the floating rod below, the floating rod pulls through many first wire rope the mud scraper assembly makes the mud scraper assembly can be followed the circular motion is to the center pillar, first wire rope's one end with the mud scraper assembly passes through bolt-up connection, first wire rope's the other end with floating rod fixed connection.
Similar to foretell mud scraper among the prior art, it adopts the floating lever to connect many first wire rope, the mud scraper assembly is pull to the multiple spot, connect the floating lever through the tractor, and then drive the mud scraper assembly and scrape mud, can be with mud discharge, but when silt is more and contains the silt of caking in the sedimentation tank, its mud scraper assembly is the arc, can lead to scraping the mud in-process, silt piles up rapidly in curved inflection department easily, in addition the silt of caking blocks, can produce great hindrance, and the mud scraper simple structure of its setting, light in weight, can lead to mud scraper work load too big, the mud scraping speed is slow, and is inefficient, thereby be difficult to realize quick mud scraping when sedimentation tank silt is more.
SUMMERY OF THE UTILITY MODEL
To current technical problem, an object of the utility model is to provide a sedimentation tank is handled to silt, it has the advantage that also can scrape mud fast when sedimentation tank silt is more.
In order to achieve the above purpose, the utility model provides a following technical scheme: a sludge treatment sedimentation tank comprises a tank body and a sludge scraping device arranged in the tank body, wherein the center of the bottom of the tank body is provided with a sludge collecting groove, the mud scraping device comprises a driving component arranged above the center of the tank body, a rotating shaft connected to the bottom of the driving component, a base arranged at the bottom of the mud collecting tank and bearing the rotating shaft, and a mud scraping component arranged on the radial outer side of the rotating shaft, the driving component drives the rotating shaft to rotate, the upper end and the lower end of the rotating shaft are respectively provided with a fixed block fixed on the rotating shaft in a penetrating way, the mud scraping component comprises two symmetrical arc-shaped frames, a mud scraping plate fixedly connected to the bottoms of the arc-shaped frames and a mud cutting knife fixedly connected to the bottoms of the arc-shaped frames, the inner side wall of the arc-shaped frame is horizontally connected with the fixed block, the outer side wall of the arc-shaped frame is close to the tank wall of the tank body, one side of the mud scraping plate and one side of the mud cutting knife are abutted against the bottom surface of the pool body, and the mud cutting knife is arranged in front of the mud scraping plate along the rotation direction.
By adopting the technical scheme, the driving assembly drives the rotating shaft to rotate circumferentially, the rotating shaft is used as the axis to drive the arc-shaped frame to rotate circumferentially, the arc-shaped frame is arranged to be two symmetrical arc-shaped frames, so that stress is guided to the arc-shaped concave part at the two ends of the arc-shaped frame when the driving assembly is started, resistance to be overcome when the driving assembly is started is reduced, the arc-shaped frame can be uniformly stressed and can keep more stable rotation in the rotating mud scraping process, the outer side of the arc-shaped frame is close to the tank wall, after the arc-shaped frame rotates for a half circle by taking the rotating shaft as the axis, the path passed by the bottom of the arc-shaped frame approximately covers the tank bottom, mud can be scraped to the tank bottom all around, in the rotating process, the mud scraping plate and the mud cutting knife at the bottom of the arc-shaped frame rotate around the rotating shaft circumference, the mud scraping plate and the mud cutting knife are abutted against the tank bottom, the ca, the resistance of the sludge to the sludge scraping plate is effectively reduced, and the effect of quickly scraping the sludge when the sludge in the sedimentation tank is more is realized.
The utility model discloses further set up to: the arc frame includes arc pole, lower arc pole to and the tip pole, the inboard fixed mounting of going up the arc pole is on the fixed block of axis of rotation upper end, the inboard fixed mounting of arc pole is on the fixed block of axis of rotation lower extreme down, the tip pole is vertical to be connected between the tip of keeping away from the axis of rotation of last arc pole and lower arc pole.
Through adopting above-mentioned technical scheme, the motor drives the subassembly drive axis of rotation and rotates, and the fixed block rotates along with the axis of rotation, and then drives the upper and lower arc pole circumference of fixing on the fixed block and rotate, and the fixed block is upper and lower arc pole pivoted impetus, establishes the fixed block respectively also makes the rotation more stable in the upper and lower end of axis of rotation.
The utility model discloses further set up to: a plurality of connecting rods which are distributed at equal intervals are arranged between the upper arc-shaped rod and the lower arc-shaped rod of the arc-shaped frame along the arc-shaped path.
Through adopting above-mentioned technical scheme, the connecting rod is used for fixed whole arc frame, keeps the stability of arc frame.
The utility model discloses further set up to: the mud scraper is provided with a plurality of blocks, and the mud scraper is horizontally obliquely installed along the bottom of the arc-shaped frame at equal intervals.
Through adopting above-mentioned technical scheme for form the staggered clearance of level between the adjacent mud scraper, the effectual resistance that has reduced silt to the mud scraper.
The utility model discloses further set up to: the mud cutting knife is provided with a plurality of blocks, the mud cutting knife is tangent to the circumferential line of the circumferential rotation of the mud cutting knife, and a cutting edge is arranged on one side of the mud cutting knife, which is far away from the mud scraper.
Through adopting above-mentioned technical scheme, cut the mud sword at the circumference rotation in-process, the blade cuts the silt that becomes the solid piece along the direction of rotation, has avoided arousing silt muddy when the cutting.
The utility model discloses further set up to: and a sludge discharge pipe is arranged at the bottom of the sludge collection groove.
Through adopting above-mentioned technical scheme, the mud scraper scrapes the mud collection inslot with silt, and the mud pipe supplies the silt in the mud collection inslot to discharge.
The utility model discloses further set up to: the top of the driving assembly is provided with a fixed rod, the top of the driving assembly is fixed in the middle of the fixed rod, and two ends of the fixed rod are fixed at the upper end of the side wall of the tank body.
Through adopting above-mentioned technical scheme, the dead lever is used for fixed drive assembly, keeps drive assembly's stability for whole mud scraping work normal operating.
The utility model discloses further set up to: the drive assembly comprises a motor, and a rotating shaft of the motor is fixedly connected with the upper end of the rotating shaft.
Through adopting above-mentioned technical scheme, the motor provides the turning force, rotates through the pivot of motor for the axis of rotation of connecting the motor rotates, and then drives the operation of whole mud work of scraping.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) by arranging the arc-shaped frame, the arc shape enables the contact surface of the mud scraping plate and the mud to be increased, the guiding force is increased, and the mud scraping effect is better;
(2) the edge of the mud scraping plate is abutted against the bottom of the tank body by arranging the mud scraping plate, and the mud scraping plate rotates circumferentially to scrape mud in the mud scraping process so as to scrape the mud to the mud collecting groove;
(3) through setting up the mud cutter, the mud scraping in-process cuts the mud cutter and establishes in front of the mud scraper, cuts earlier the silt that has the caking, scrapes mud through the mud scraper again, and the effectual resistance that alleviates silt to the mud scraper keeps quick mud scraping speed.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
fig. 2 is a schematic cross-sectional structure diagram of the present embodiment.
Reference numerals: 1. a tank body; 2. a mud scraping device; 3. a sludge collection tank; 4. a drive assembly; 5. a rotating shaft; 6. a base; 7. a mud scraping assembly; 8. an arc-shaped frame; 9. a mud scraper; 10. a mud cutter; 11. an upper arc-shaped rod; 12. a lower arc-shaped rod; 13. an end rod; 14. a connecting rod; 15. cutting edges; 16. a sludge discharge pipe; 17. fixing the rod; 18. a motor; 19. and (5) fixing blocks.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
The embodiment, a sedimentation tank is handled to silt, as shown in fig. 1 and fig. 2, including cell body 1 and mud scraping device 2, mud collecting groove 3 has been seted up to the central point of 1 bottom of cell body, mud scraping device 2 sets up in cell body 1, mud scraping device 2 includes drive assembly 4, axis of rotation 5, base 6 and mud scraping component 7, base 6 installs the bottom in mud collecting groove 3, the lower extreme of axis of rotation 5 is connected in the rotation of base 6 higher authority, drive assembly 4 is connected to the upper end of axis of rotation 5, axis of rotation 5 is close to the fixed block 19 that is equipped with respectively in position of last lower extreme, mud scraping component 7 fixed connection is on the fixed block 19 of axis of rotation 5, mud scraping component 7 revolutes 5 circumference rotations of axis of rotation.
As shown in fig. 1 and 2, drive assembly 4 is started, order about the 5 circumferential rotations of the axis of rotation of connecting in drive assembly 4, 5 lower extremes of axis of rotation rotate and connect on base 6, base 6 bears 5 circumferential rotations of axis of rotation, two fixed blocks 19 of fixing the upper and lower extreme of axis of rotation 5 rotate along with 5 circumferential rotations of axis of rotation, and then linkage mud scraping assembly 7 revolves 5 circumferential rotations of axis of rotation, mud scraping assembly 7 is used for the mud work of scraping of cell body 1 bottom, the silt of the bottom of the pool is scraped to mud collection groove 3 in the rotation process.
As shown in fig. 1 and 2, a fixing rod 17 is arranged above the driving assembly 4, the fixing rod 17 is used for fixing the driving assembly 4, the driving assembly 4 is fixedly connected to the middle of the fixing rod 17, two ends of the fixing rod 17 extend to the pool edge and are fixed to the pool edge, the driving assembly 4 comprises a motor 18, a rotating shaft of the motor 18 is connected with the upper end of a rotating drawer, the lower end of the rotating drawer is rotatably connected with the base 6, the motor 18 is started, the rotating shaft of the motor 18 rotates, and the rotating shaft 5 is driven to stably rotate on the base 6.
As shown in fig. 1 and 2, the mud scraping assembly 7 includes two symmetrical arc frames 8, a mud scraping plate 9 and a mud cutting knife 10, the arc frames 8 include an upper arc rod 11, a lower arc rod 12 and an end rod 13, the inner side of the upper arc rod 11 is horizontally and fixedly connected to a fixing block 19 at the upper end of the rotating shaft 5, the inner side of the lower arc rod 12 is horizontally and fixedly connected to a fixing block 19 at the lower end of the rotating shaft 5, the end rod 13 is connected to the ends of the upper arc rod 11 and the lower arc rod 12, the outer side walls of the upper arc rod 12 and the lower arc rod 12 are close to the tank wall of the sedimentation tank, a plurality of connecting rods 14 distributed at equal intervals are arranged between the upper arc rod 11 and the lower arc rod 12 along the arc path, the upper end and the lower end of the connecting rods 14 are respectively connected to the upper arc rod 12 and the lower arc rod 12 of the arc frame 8 to form an integral arc frame 8, so that the structure, so that the sludge is easier to be guided to the sludge collecting tank.
Further, as shown in fig. 1 and fig. 2, the bottom of the lower arc rod 12 is fixedly provided with a mud scraper 9 and a mud cutter 10, the bottom sides of the mud scraper 9 and the mud cutter 10 are abutted against the bottom surface of the tank body 1, the mud cutter is arranged in front of the mud scraper 9 along the rotation direction, the rotating shaft of the motor 18 rotates, the rotating shaft 5 rotates, under the driving of the rotating shaft 5, the arc frame 8 rotates along the mud scraping direction, and drives the mud scraper 9 and the mud cutter 10 fixed at the bottom of the lower arc rod 12 to synchronously rotate circumferentially, the mud cutter 10 cuts the mud with solid blocks in front of the mud scraping direction of the mud scraper 9, so that the solid blocks of the mud are reduced, the mud is scraped through the mud scraper 9, the mud is collected to the mud collecting tank 3, the mud collecting tank 3 is provided with a mud discharge pipe 16, and the mud pipe 16 discharges the mud in the mud collecting tank 3.
As shown in fig. 1 and 2, the scraper 9 is installed along an arc-shaped path and horizontally inclined by 30 degrees between the lower arc-shaped rods, the scraper 9 is provided with a plurality of blocks, a gap is formed between two adjacent scrapers 9, when more sludge is generated, the sludge scraping operation needs to be repeated for a plurality of times to rotate the scraper, a small amount of sludge can overflow from the gap first, the resistance of the sludge to the scraper 9 is reduced, and the repeated rotation of the scraper continues to scrape the rest sludge to the sludge collecting tank.
As shown in fig. 1 and 2, the mud cutting knife 10 is provided with a cutting edge 15, the cutting edge 15 cuts mud along the rotation direction, the movement of the cutting edge 15 forms a circumferential line, and during the mud cutting process, the other parts of the mud cutting knife 10 except the cutting edge 15 are prevented from having interference with the mud as much as possible. The mud cutting knife 10 can keep the mud not to be turbid in the mud cutting process.
The utility model discloses a working process and beneficial effect as follows: the driving component 4 drives the rotating shaft 5 to rotate circumferentially, the rotating shaft 5 is used as an axis to drive the arc-shaped frame 8 to rotate circumferentially, the arc-shaped frame 8 is arranged to guide stress to the arc-shaped concave part at two ends of an arc shape when the driving component 4 is started, resistance to be overcome when the driving component is started is reduced, the arc-shaped frame 8 is arranged to be two symmetrical parts, so that the stress can be uniformly applied in the rotating mud scraping process, more stable rotation can be kept, the outer side of the arc-shaped frame 8 is close to the tank wall, after the arc-shaped frame 8 rotates for a half circle by using the rotating shaft 5 as the axis, the path passed by the bottom of the arc-shaped frame 8 approximately covers the tank bottom, mud scraping work can be carried out on the bottom of the tank body 1 in all directions, in the rotating process, the mud scraping plate 9 and the mud cutting knife 10 at the bottom of the arc-shaped frame 8 rotate around the rotating shaft 5 circumferentially, the mud scraping plate 9 and the, the mud scraper 9 scrapes mud again, and the effectual resistance that alleviates silt to the mud scraper 9 has realized also the effect of quick mud scraping when sedimentation tank silt is more.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a sedimentation tank is handled to silt, includes cell body (1) and installs mud scraping device (2) in cell body (1), mud collection groove (3), its characterized in that have been seted up at the center of cell body (1) bottom: the mud scraping device (2) comprises a driving assembly (4) arranged above the center of the pool body (1), a rotating shaft (5) connected to the bottom of the driving assembly (4), a base (6) arranged at the bottom of the mud collecting groove (3) and used for bearing the rotating shaft (5), and a mud scraping assembly (7) arranged on the radial outer side of the rotating shaft (5), wherein the driving assembly (4) drives the rotating shaft (5) to rotate, the upper end and the lower end of the rotating shaft (5) are respectively provided with a fixing block (19) fixed on the rotating shaft (5) in a penetrating manner, the mud scraping assembly (7) comprises two symmetrical arc-shaped frames (8), a mud scraping plate (9) fixedly connected to the bottom of the arc-shaped frame (8) and a mud cutting knife (10) fixedly connected to the bottom of the arc-shaped frame (8), the inner side wall of the arc-shaped frame (8) is horizontally connected to the fixing block (19), and the, one side of the mud scraping plate (9) and one side of the mud cutting knife (10) are abutted against the bottom surface of the pool body (1), and the mud cutting knife (10) is arranged in front of the mud scraping plate (9) along the rotation direction.
2. A sludge treatment settling tank as claimed in claim 1, wherein: arc frame (8) are including last arc pole (11), lower arc pole (12) to and tip pole (13), the inboard fixed mounting of going up arc pole (11) is on fixed block (19) of axis of rotation (5) upper end, the inboard fixed mounting of lower arc pole (12) is on fixed block (19) of axis of rotation (5) lower extreme, tip pole (13) vertical connection is in last arc pole (11) and lower arc pole (12) between the tip of keeping away from the axis of rotation.
3. A sludge treatment settling tank as claimed in claim 1, wherein: a plurality of connecting rods (14) which are distributed at equal intervals are arranged between the upper arc-shaped rod (11) and the lower arc-shaped rod (12) of the arc-shaped frame (8) along an arc-shaped path.
4. A sludge treatment settling tank as claimed in claim 1, wherein: the mud scraper (9) is provided with a plurality of blocks, and the mud scraper (9) is horizontally obliquely installed along the bottom of the arc-shaped frame (8) at equal intervals.
5. A sludge treatment settling tank as claimed in claim 1, wherein: the mud cutting knife (10) is provided with a plurality of blocks, the mud cutting knife (10) is tangent to the circumferential line of the circumferential rotation of the mud cutting knife (10), and a cutting edge (15) is arranged on one side of the mud cutting knife (10) far away from the mud scraper (9).
6. A sludge treatment settling tank as claimed in claim 1, wherein: and a sludge discharge pipe (16) is arranged at the bottom of the sludge collection groove (3).
7. A sludge treatment settling tank as claimed in claim 1, wherein: the device is characterized in that a fixing rod (17) is arranged on the top of the driving assembly (4), the middle of the fixing rod (17) is fixed on the top of the driving assembly (4), and the two ends of the fixing rod (17) are fixed at the upper end of the side wall of the tank body (1).
8. A sludge treatment settling tank as claimed in claim 1, wherein: the driving assembly (4) comprises a motor (18), and a rotating shaft of the motor (18) is fixedly connected with the upper end of the rotating shaft (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201920716863.7U CN210278370U (en) | 2019-05-17 | 2019-05-17 | Sedimentation tank for sludge treatment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201920716863.7U CN210278370U (en) | 2019-05-17 | 2019-05-17 | Sedimentation tank for sludge treatment |
Publications (1)
Publication Number | Publication Date |
---|---|
CN210278370U true CN210278370U (en) | 2020-04-10 |
Family
ID=70070322
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201920716863.7U Expired - Fee Related CN210278370U (en) | 2019-05-17 | 2019-05-17 | Sedimentation tank for sludge treatment |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN210278370U (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111499135A (en) * | 2020-04-30 | 2020-08-07 | 青岛羚角化工技术有限责任公司 | Plate-type sludge continuous fermentation tower |
CN111530132A (en) * | 2020-05-13 | 2020-08-14 | 李刚 | Bottom mud scraper device for sewage treatment sedimentation tank |
CN111686483A (en) * | 2020-06-22 | 2020-09-22 | 吉安县苏运物流有限公司 | Sludge discharge device for sewage treatment |
CN112190985A (en) * | 2020-09-10 | 2021-01-08 | 山东理工职业学院 | Dirty device of scraping for treatment facility of industrial circulating water |
CN114011120A (en) * | 2021-11-25 | 2022-02-08 | 安徽拓水环境工程科技有限公司 | Ring type mud scraper |
-
2019
- 2019-05-17 CN CN201920716863.7U patent/CN210278370U/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111499135A (en) * | 2020-04-30 | 2020-08-07 | 青岛羚角化工技术有限责任公司 | Plate-type sludge continuous fermentation tower |
CN111530132A (en) * | 2020-05-13 | 2020-08-14 | 李刚 | Bottom mud scraper device for sewage treatment sedimentation tank |
CN111530132B (en) * | 2020-05-13 | 2022-06-24 | 徐州中知知识产权服务有限公司 | Bottom mud scraper device for sewage treatment sedimentation tank |
CN111686483A (en) * | 2020-06-22 | 2020-09-22 | 吉安县苏运物流有限公司 | Sludge discharge device for sewage treatment |
CN112190985A (en) * | 2020-09-10 | 2021-01-08 | 山东理工职业学院 | Dirty device of scraping for treatment facility of industrial circulating water |
CN114011120A (en) * | 2021-11-25 | 2022-02-08 | 安徽拓水环境工程科技有限公司 | Ring type mud scraper |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN210278370U (en) | Sedimentation tank for sludge treatment | |
CN209019967U (en) | Self-cleaning mud scraper | |
CN111530132B (en) | Bottom mud scraper device for sewage treatment sedimentation tank | |
CN210080278U (en) | Cleaning device for inner wall of sedimentation tank | |
CN210495349U (en) | Center drive mud scraper | |
CN208927685U (en) | A kind of mud scraper | |
CN112900351A (en) | River bottom leveling device for hydraulic engineering | |
CN219807815U (en) | Dross collection device for municipal sewage treatment | |
CN217449070U (en) | Large vertical inclined plate sedimentation tank for treating coking wastewater | |
KR200340159Y1 (en) | Scum Removal system of water control system | |
TWM316286U (en) | Floating waste scraping apparatus for floating sewage removal tank | |
CN215995728U (en) | Energy-saving center drive mud scraper | |
US4000075A (en) | Sedimentation tank with rotary yieldable rake arm structure | |
KR101073856B1 (en) | scum remover of round type sludge collector used for water treatment | |
KR20090059759A (en) | The removing device of scum and sludge in the circle water tank | |
CN213327265U (en) | Stirring device for sludge condensation tank | |
CN211836447U (en) | Drum-type oil-water separator | |
KR200255885Y1 (en) | Sludge Collector of Circular Settlement | |
CN219701642U (en) | Carbide slag thick liquid agitating unit | |
CN212970671U (en) | Forestry production is with vegetation device that loosens soil | |
CN219167852U (en) | Solid-liquid separation device for environmental engineering | |
CN210674404U (en) | Sewage treatment pond floats mud cleaning device | |
CN206138804U (en) | Waste water sedimentation pond's mud scrapping device | |
CN210632596U (en) | Moss cleaning machine | |
CN209885279U (en) | Scraper blade with adjustable potassium humate production usefulness |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
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: 20200410 |