CN214391430U - Motor iron core cleaning equipment - Google Patents
Motor iron core cleaning equipment Download PDFInfo
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- CN214391430U CN214391430U CN202023312570.4U CN202023312570U CN214391430U CN 214391430 U CN214391430 U CN 214391430U CN 202023312570 U CN202023312570 U CN 202023312570U CN 214391430 U CN214391430 U CN 214391430U
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- 238000004140 cleaning Methods 0.000 title claims abstract description 86
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000000926 separation method Methods 0.000 claims abstract description 55
- 238000000746 purification Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 7
- 238000005192 partition Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 3
- 230000003749 cleanliness Effects 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a motor core cleaning device, which is characterized in that a cleaning area is arranged outside a cleaning box body, a guide cover which enables the cleaning area to form a closed area and an air nozzle which blows air into the closed area are arranged outside the cleaning box body; the lower part of the cleaning area is communicated with the inside of the cleaning box body; a pressure slow release ring and an air damper are arranged in the cleaning box body, and a positive pressure area is formed among the air guide sleeve, the pressure slow release ring and the air damper; a negative pressure area is formed in the cleaning box body, a flow guide clapboard is fixedly arranged in the middle of the negative pressure area, a flow guide opening for guiding the gas discharged from the pressure slow release ring to the bottom in the cleaning box body is formed in the flow guide clapboard, and a pre-settling area is formed below the flow guide clapboard; a multi-stage separation and purification device is arranged on one side in the cleaning box body, and an air inlet of the multi-stage separation and purification device is positioned on one side of the middle part of the negative pressure area. The clean iron core through this application iron core cleaning equipment has higher surface cleanliness, and can carry out multistage collection processing to the waste matter that cleans down, avoids producing the pollution to environment and other products.
Description
Technical Field
The utility model relates to a motor core cleaning device.
Background
Regarding two main directions of ultrasonic wave and high-pressure gas cleaning in the new energy motor iron core cleaning current market, ultrasonic cleaning can reach a very high standard, but because the iron core is dried and needs a complete production line to support, only stay in the test verification result stage at present, because the low-risk mass production of output temporarily does not see relevant reports, also does not see the adoption of the same line in the industry. High-pressure gas cleaning is a direction which is slightly poor in result but capable of realizing mass production and is initially adopted by manufacturers in the industry at present, and since no mature equipment exists in the market, all the manufacturers belong to research and development of the manufacturers. The prior known proposal has two types of direct blowing and closed type anion air blowing, the direct blowing has good effect on the directly blown products, but the foreign matters can be blown away in the air and pollute the field and other products due to the open space; although the closed negative ion blowing mode solves the problem of environmental pollution, a stable one-way airflow is not formed when high-pressure blowing is carried out in a small space, so that foreign matters are not effectively brought out of the range of an iron core by the one-way airflow after being blown, and the cleaning efficiency is reduced.
Disclosure of Invention
To the problem, the utility model aims at providing an improve the cleanliness and can avoid environmental pollution's motor core cleaning equipment.
Realize the technical scheme of the utility model as follows
The motor iron core cleaning equipment comprises a cleaning box body, wherein a region to be cleaned for placing a motor iron core to be cleaned is arranged above the cleaning box body, a flow guide cover for covering the region to be cleaned and the motor iron core to be cleaned, which is placed in the region to be cleaned, in the cleaning box body so as to form a closed region, and an air nozzle for blowing air into the closed region of the region to be cleaned are arranged above the cleaning box body;
a communicating opening communicated with the interior of the cleaning box body is arranged below the cleaning area;
a pressure slow release ring communicated with the communication port is arranged in the cleaning box body below the communication port, an air adjusting door is arranged below the pressure slow release ring, and a positive pressure area is formed among the air guide sleeve, the pressure slow release ring and the air adjusting door;
a negative pressure area is formed below the pressure slow release ring in the cleaning box body, a flow guide partition plate is fixedly arranged in the middle of the negative pressure area, a flow guide opening for guiding the gas discharged from the pressure slow release ring to the bottom in the cleaning box body is formed in the flow guide partition plate, and a pre-settling area is formed below the flow guide partition plate;
a multi-stage separation and purification device is arranged on one side in the cleaning box body, and an air inlet of the multi-stage separation and purification device is positioned on one side of the middle part of the negative pressure area.
Further, in order to guide the air discharged from the positive pressure area to the negative pressure area orderly, the diversion partition plate is arranged right below the air damper, and the diversion opening is opposite to the air damper.
Further, in order to slowly release the gas exhausted from the positive pressure area, a conical cavity is formed in the pressure slow release ring, and one end, with a small caliber, of the pressure slow release ring is arranged downwards.
Furthermore, in order to realize the automatic lifting action of the air guide sleeve and promote automation, a support is fixedly arranged outside the cleaning box body, a lifting driving mechanism for driving the air guide sleeve to lift is arranged on the support, the lifting driving mechanism comprises a lifting cylinder and a connecting frame, the lifting cylinder is arranged on the support, the connecting frame is arranged at the driving end of the lifting cylinder, and the air guide sleeve is fixedly connected with the connecting frame.
Further, for the better cleanness of blowing of treating clean motor core, install the rotating electrical machines on the link, the air cock is arranged in the kuppe, and the air cock is rotatory air cock, and the drive end and the rotatory air cock of rotating electrical machines are connected to order about revolving cylinder and blow at the kuppe internal rotation.
Further, for better separation and purification, the multi-stage separation and purification device adopts tertiary separation and purification, and the multi-stage separation and purification device comprises a first-stage vortex separation device, a second-stage vortex separation device and a third-stage terminal filtration device, wherein the air inlet of the first-stage vortex separation device is the air inlet of the multi-stage separation and purification device, the air outlet of the first-stage vortex separation device is communicated with the air inlet of the second-stage vortex separation device, the air outlet of the second-stage vortex separation device is communicated with the air inlet of the third-stage terminal filtration device, and the air outlet of the third-stage terminal filtration device is communicated with air extraction equipment.
Further, the first-stage vortex separation device and the second-stage vortex separation device respectively comprise a vortex separator;
the vortex separator comprises an outer cylinder and a filter cylinder arranged in the outer cylinder, an annular channel is formed between the outer cylinder and the filter cylinder, the annular channel is communicated with an air inlet of the vortex separation device in a tangential mode, and an exhaust channel communicated with an exhaust port of the vortex separation device is formed in the filter cylinder.
Further, in order to collect and treat the waste separated by the vortex in a centralized manner, a collecting barrel is arranged below the vortex separator, and a recovery tray is arranged below the collecting barrel.
Further, in order to collect and treat the waste settled in the settling zone in a centralized manner, the pre-settling zone is provided with a settling recovery tray for collecting the waste in the settling zone.
Further, in order to automatically send the motor iron core to be cleaned on the workbench into the area to be cleaned, the automation degree is improved, the motor iron core to be cleaned on the workbench is arranged above the cleaning box body, and the feeding mechanism is sent to the position of the area to be cleaned from the position of the workbench.
Along with the improvement of the requirement of the new energy motor iron core on the cleanliness, the inherent foreign matter generation conditions of a stamping process, a welding process and the like cannot be avoided by methods of improving the cleanliness of stamping raw materials, the cleanliness of equipment environment and the like, a large amount of management and control cost is consumed, the remarkable reduction of the total amount of the foreign matter cannot be realized, a remarkable result can be obtained at a low cost through end cleaning, and good economic benefits are obtained. And the scheme of this application does, blows off motor core through the foreign matter of air cock under to the enclosure space simultaneously, guarantees through the malleation nip that forms stably in iron core both sides that the foreign matter is taken out clean region by one-way air current to enter the negative pressure zone, subside the mode and get rid of big particulate matter in the negative pressure zone, the tertiary separation of rethread is collected filter equipment and is collected the foreign matter and retrieve. The clean iron core through this application iron core cleaning equipment has higher surface cleanliness, and can carry out multistage collection processing to the waste matter that cleans down, avoids producing the pollution to environment and other products.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the middle vortex separator of the present invention;
in the drawing, 1 is a cleaning box body, 2 is a motor iron core, 3 is a region to be cleaned, 4 is a guide hood, 5 is an air nozzle, 6 is a support, 7 is a lifting cylinder, 8 is a connecting frame, 9 is a rotating motor, 10 is a communication port, 11 is a pressure slow release ring, 12 is a damper, 13 is a positive pressure region, 14 is a negative pressure region, 15 is a guide partition plate, 16 is a guide port, 17 is a pre-settling region, 18 is a settling recovery tray, 19 is an air inlet, 20 is a first-stage vortex separation device, 21 is a second-stage vortex separation device, 22 is a third-stage end filtering device, 23 is a vortex separator, 24 is an outer cylinder, 25 is a filter cylinder, 26 is an annular channel, 27 is an exhaust channel, 28 is a collection barrel, 29 is a recovery tray, 30 is a workbench, 31 is a feeding mechanism, and 32 is a main control electric cabinet.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the motor core cleaning device comprises a cleaning box body 1, a closed space is arranged in the cleaning box body 1, a cleaning area 3 for placing a motor core 2 to be cleaned is arranged on the upper left outside the cleaning box body 1, a guide cover 4 for covering the cleaning area 3 and the motor core 2 to be cleaned placed in the cleaning area 3 is arranged on the upper left outside the cleaning box body 1, the guide cover is an annular body with an open lower end, and the lower end of the guide cover is in contact with the cleaning area to form a seal, so that a closed area is formed above the cleaning area and inside the guide cover.
And an air nozzle 5 for blowing air into the closed area formed above the area to be cleaned; in the specific implementation, a support 6 is fixedly arranged at the upper left outside the cleaning box body 1, a lifting driving mechanism for driving the guide cover 4 to lift is arranged on the support 6, the lifting driving mechanism comprises a lifting cylinder 7 and a connecting frame 8, the lifting cylinder 7 is fixedly arranged on the support 6, the connecting frame 8 is arranged at the driving end of the lifting cylinder 7, and the guide cover 4 is fixedly connected with the connecting frame 8. When the lifting cylinder 7 extends out, the air guide sleeve 4 can move downwards through the connecting frame 8, so that the lower end face of the air guide sleeve 4 is in contact with an area to be cleaned to form sealing; when the lifting cylinder 7 retracts, the cleaning area 3 is opened through the upward movement of the connecting frame 8, and the motor iron core 2 to be cleaned can be taken and placed.
Install rotating electrical machines 9 on the link 8, air cock 5 arranges in kuppe 4, and air cock 5 is rotatory air cock, and the drive end and the rotatory air cock of rotating electrical machines 9 are connected to order about revolving cylinder 9 and blow in kuppe 4 internal rotation. The structure of air cock adopts the shape of buckling gas blow pipe of buckling to the motor core side from motor core top, has the gas hole on the gas blow pipe, can treat to clean motor core like this from the top and one side of treating clean motor core, treats that clean motor core blows in multiple directions, makes the clean efficiency of blowing improve. In addition, the cleaning area can be provided with a cushion block which supports the motor iron core to be cleaned when the motor iron core to be cleaned is placed in, so that the lower surface of the motor iron core to be cleaned is in a suspended state.
A communicating opening 10 communicated with the interior of the cleaning box body 1 is formed below the cleaning area 3, so that air sent into the cleaning area and sundries blown down from the motor iron core enter the cleaning box body 1 from the communicating opening.
A pressure slow release ring 11 communicated with the communication port 10 is arranged in the cleaning box body 1 below the communication port 10, an air damper 12 is arranged below the pressure slow release ring 11, and a positive pressure area 13 is formed among the air guide sleeve 4, the pressure slow release ring 11 and the air damper 12; the pressure slow release ring 11 is internally provided with a conical cavity, the end with the small caliber of the pressure slow release ring is arranged downwards, the end with the large caliber is communicated with the mask, and the air damper adopts a one-way air damper only for exhausting gas in a positive pressure area.
A negative pressure zone 14 is formed below the pressure slow release ring to be pressed in the cleaning box body 1, a flow guide partition plate 15 is fixedly arranged in the middle of the negative pressure zone 14, a flow guide opening 16 for guiding the gas discharged from the pressure slow release ring to the bottom in the cleaning box body is formed in the flow guide partition plate, and a pre-settling zone 17 is formed below the flow guide partition plate; the diversion partition 15 is arranged under the air damper 12, and the diversion port 16 faces the air damper 12, so that the exhaust air from the air damper is guided to the lower part of the diversion partition through the diversion port, namely to the pre-settling zone 17, and the large-particle impurities are settled therein. The pre-settling zone 17 is provided with a settling recovery tray 18 for collecting the settling zone waste.
A multi-stage separation and purification device is arranged on one side in the cleaning box body, and an air inlet 19 of the multi-stage separation and purification device is positioned on one side of the middle part of the negative pressure area. The position of the inlet 19 is preferably below the baffle 15, i.e. the height of the inlet 19 does not exceed the height of the baffle 15, so that the discharge from the settling zone is orderly into the inlet 19.
Wherein, multistage separation purifier in this application adopts tertiary separation to purify, it includes first order vortex separator 20, second level vortex separator 21, third level terminal filter 22, first order vortex separator's air inlet is multistage separation purifier's air inlet 19, first order vortex separator's gas outlet forms the intercommunication with second level vortex separator's air inlet, second level vortex separator's gas outlet forms the intercommunication with third level terminal filter's air inlet, third level terminal filter's gas outlet intercommunication air exhaust equipment.
The first-stage vortex separation device and the second-stage vortex separation device respectively comprise a vortex separator 23 so as to efficiently filter impurities contained in the gas. Specifically, the vortex separator comprises an outer cylinder 24 and a filter cylinder 25 arranged in the outer cylinder, an annular channel 26 is formed between the outer cylinder and the filter cylinder, the annular channel 26 is communicated with an air inlet of the vortex separation device in a tangential mode, and an exhaust channel 27 communicated with an exhaust port of the vortex separation device is formed in the filter cylinder. A collecting barrel 28 is arranged below the vortex separator, and a recovery tray 29 is arranged below the collecting barrel to intensively collect the recovered sundries.
The upper part of the cleaning box body is provided with a workbench 30, the upper part of the cleaning box body 1 is provided with a feeding mechanism 31 which pushes the motor iron core to be cleaned on the workbench 30 to the position of the area to be cleaned from the position of the workbench, and the feeding mechanism can be realized by adopting a pushing mechanism in the prior art, such as a cylinder matched with a push block.
A main control electrical cabinet 32 is provided on the right side of the cleaning cabinet to provide control requirements for the cleaning apparatus.
The utility model discloses a working process: after the motor core product is placed on the working platform 30, the product is pushed to the area 3 to be cleaned by the feeding mechanism 31, the lifting cylinder 7 moves downwards to enable the product to enter a closed area, and the rotary air nozzle blows air gradually from top to bottom under the action of the rotary motor. The flow guide ring, the pressure slow release ring and the adjustable air door on the outer ring of the product form a positive pressure area together, and a stable pressure difference is formed together in a negative pressure area corresponding to the positive pressure area, so that the one-way positive pressure is effectively formed at the upper end of the product, the one-way airflow formed by the pressure difference is weakened for preventing the rapid release of the pressure, and the irregular scattering of foreign matters caused by the small-range turbulence is effectively reduced by the arrangement of the adjustable air door. In the blowing area, the rotary air nozzle from top to bottom blows off the foreign matters on the product downwards gradually under the protection of the positive pressure at the upper end. The air with foreign matters passing through the slow release area enters the negative pressure area to be rapidly released, and the negative pressure space capacity, the air blowing speed and the air pumping speed need to be effectively matched in order to ensure the pressure difference between the upper part and the lower part. In order to ensure the long-term constant-pressure work of the air extraction system, a multi-stage separation design system is adopted in the air flow design of the equipment, the main principle is that substances with higher density in the air are separated out by the rapid change of the flow direction and the speed of the air flow and relying on the inertia principle, the basic principle of vortex separation is shown in figure 2, the air with foreign matters enters an annular channel from an air inlet, and the air with the separated foreign matters with high density is discharged from a central exhaust channel. And the last section filters lighter foreign matters by using a filtering mode, so that the overall maintenance time is effectively prolonged, and the loss of consumable articles is greatly reduced. The pre-settling area of the negative pressure area is a first heavy material separation area, the side design of the air suction opening (air inlet 19) and the design of the flow guide partition plate ensure the normal operation of the negative pressure area, and form a first U-shaped air channel to block large metal particles from entering the collecting, separating and air extracting device. In small-size suspensible foreign matter separation collection area, three-level constant voltage separation purifies is in proper order: small-size foreign matter vortex separation, miniature foreign matter vortex separation and end filtration, the small-size foreign matter vortex separator air of first order is got into by the air inlet, falls into the collecting vessel after the foreign matter separation, and the air gets into the miniature foreign matter vortex separator of second level by the center, falls into the collecting vessel after the miniature foreign matter separation, and the air gets into the tertiary end filtration again, and the air discharge after will filtering through axial fan at last.
Of course, the cleaning equipment of the application is not only applied to surface cleaning of the motor iron core, but also applied to cleaning of other products with higher requirements on surface cleanliness according to needs.
Claims (10)
1. The motor iron core cleaning equipment comprises a cleaning box body, a region to be cleaned for placing the motor iron core to be cleaned is arranged above the outside of the cleaning box body, and is characterized in that,
a guide cover for covering the area to be cleaned and the iron core of the motor to be cleaned, which is placed in the area to be cleaned, in the cleaning box body to form a closed area, and an air nozzle for blowing air into the closed area of the area to be cleaned are arranged above the cleaning box body;
a communicating opening communicated with the interior of the cleaning box body is arranged below the cleaning area;
a pressure slow release ring communicated with the communication port is arranged in the cleaning box body below the communication port, an air adjusting door is arranged below the pressure slow release ring, and a positive pressure area is formed among the air guide sleeve, the pressure slow release ring and the air adjusting door;
a negative pressure area is formed below the pressure slow release ring in the cleaning box body, a flow guide partition plate is fixedly arranged in the middle of the negative pressure area, a flow guide opening for guiding the gas discharged from the pressure slow release ring to the bottom in the cleaning box body is formed in the flow guide partition plate, and a pre-settling area is formed below the flow guide partition plate;
a multi-stage separation and purification device is arranged on one side in the cleaning box body, and an air inlet of the multi-stage separation and purification device is positioned on one side of the middle part of the negative pressure area.
2. The motor core cleaning apparatus of claim 1, wherein the baffle plate is disposed directly below the damper, and the flow guide port is directly opposite the damper.
3. An electric machine core cleaning apparatus as claimed in claim 1, wherein the pressure relief ring has a tapered cavity therein, and the smaller diameter end of the pressure relief ring is disposed downwardly.
4. A motor iron core cleaning device as claimed in claim 1, wherein a support is fixedly arranged outside the cleaning box body, a lifting driving mechanism for driving the air guide sleeve to move up and down is arranged on the support, the lifting driving mechanism comprises a lifting cylinder and a connecting frame, the lifting cylinder is arranged on the support, the connecting frame is arranged at the driving end of the lifting cylinder, and the air guide sleeve is fixedly connected with the connecting frame.
5. A motor core cleaning apparatus in accordance with claim 4 wherein a rotary motor is mounted on the frame, the air cap is disposed within the air guide housing, the air cap is a rotary air cap, and a drive end of the rotary motor is coupled to the rotary air cap to drive the rotary air cylinder to blow air within the air guide housing.
6. An electric machine iron core cleaning device as claimed in claim 1, wherein the multi-stage separation and purification device adopts three-stage separation and purification, and comprises a first stage vortex separation device, a second stage vortex separation device and a third stage end filtration device, wherein the air inlet of the first stage vortex separation device is the air inlet of the multi-stage separation and purification device, the air outlet of the first stage vortex separation device is communicated with the air inlet of the second stage vortex separation device, the air outlet of the second stage vortex separation device is communicated with the air inlet of the third stage end filtration device, and the air outlet of the third stage end filtration device is communicated with the air extraction device.
7. The motor core cleaning apparatus of claim 6 wherein the first stage vortex separation means and the second stage vortex separation means each comprise a vortex separator;
the vortex separator comprises an outer cylinder and a filter cylinder arranged in the outer cylinder, an annular channel is formed between the outer cylinder and the filter cylinder, the annular channel is communicated with an air inlet of the vortex separation device in a tangential mode, and an exhaust channel communicated with an exhaust port of the vortex separation device is formed in the filter cylinder.
8. An electric machine core cleaning apparatus as claimed in claim 7, wherein a collection bucket is provided below the scroll separator, and a recovery tray is provided below the collection bucket.
9. An electric machine core cleaning apparatus as claimed in claim 1, wherein the pre-settling zone is provided with a settling recovery tray for collecting settling zone waste.
10. The motor core cleaning device according to claim 1, wherein a feeding mechanism for feeding the motor core to be cleaned on the table from the position of the table to the position of the area to be cleaned is provided above the cleaning box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023312570.4U CN214391430U (en) | 2020-12-31 | 2020-12-31 | Motor iron core cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023312570.4U CN214391430U (en) | 2020-12-31 | 2020-12-31 | Motor iron core cleaning equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214391430U true CN214391430U (en) | 2021-10-15 |
Family
ID=78043549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023312570.4U Expired - Fee Related CN214391430U (en) | 2020-12-31 | 2020-12-31 | Motor iron core cleaning equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214391430U (en) |
-
2020
- 2020-12-31 CN CN202023312570.4U patent/CN214391430U/en not_active Expired - Fee Related
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| 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: 20211015 |