CN215026666U - On-line oil filter for on-load tap-changer of transformer - Google Patents
On-line oil filter for on-load tap-changer of transformer Download PDFInfo
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- CN215026666U CN215026666U CN202121380061.7U CN202121380061U CN215026666U CN 215026666 U CN215026666 U CN 215026666U CN 202121380061 U CN202121380061 U CN 202121380061U CN 215026666 U CN215026666 U CN 215026666U
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- changer
- load tap
- box
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- 238000009434 installation Methods 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims description 33
- 239000012535 impurity Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000002337 anti-port Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses an on-line oil filter of transformer on-load tap-changer belongs to on-line oil filter technical field, an on-line oil filter of transformer on-load tap-changer, the power distribution box comprises a box body, the intercommunication of pegging graft on the box has two oil pipe, the top fixed mounting has the oil pump on the oil pipe, the switch board is installed to the inner wall of box, be provided with drive arrangement on the box, drive arrangement's bottom is connected with two connecting device, two connecting device's the back of the body one end of the back of the body overlaps respectively and locates on two oil pipe. The utility model discloses a, only need reverse start drive arrangement, drive arrangement can drive two connecting device and keep away from each other, and connecting device breaks away from behind the filter, can accomplish the dismantlement to the filter, and the user can take out the filter and wash the change after that, and the in-process is very convenient and fast, and the device can convenient and fast's completion to the dismantlement and the installation of filter, and then saves the time that the user changed, improves the practicality of device.
Description
Technical Field
The utility model relates to an online oil filter technical field, more specifically say, relate to an online oil filter of transformer on-load tap-changer.
Background
The insulating oil in the oil chamber of the on-load tap-changer of the transformer is polluted by free carbon and various solid particles generated by electric arcs caused by frequent switch conversion; in addition, the oil absorbs moisture, so that the withstand voltage of the insulating oil is lowered, the moisture content is increased, the contact performance of the switch is lowered, contamination in the oil is further increased, and a vicious circle is formed.
At present, after the existing online oil filter is used for a period of time, a large amount of impurities can be remained in a filter in the existing online oil filter, the filter needs to be cleaned regularly, the existing online oil filter is very troublesome to disassemble, and a large amount of time needs to be spent, so that the online oil filter of the on-load tap-changer of the transformer is needed.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model aims to provide an online oil filter of transformer on-load tap-changer to solve current online oil filter and after using a period, a large amount of impurity can be remained to its inside filter, need regularly clear up, current online oil filter is very troublesome when dismantling, needs the problem of spending a large amount of time.
In order to solve the above problems, the utility model adopts the following technical proposal.
The utility model provides an online oil filter of transformer on-load tap-changer, includes the box, the grafting intercommunication has two oil pipes on the box, the top fixed mounting has the oil pump on the oil pipe, the switch board is installed to the inner wall of box, be provided with drive arrangement on the box, drive arrangement's bottom is connected with two connecting device, two connecting device's back of the body one end of the back of the body overlaps respectively on two oil pipes are located, be provided with positioner on the box, positioner's top is pegged graft and is had the filter.
As a further description of the above technical solution:
the driving device comprises a fixing plate, the outer side of the fixing plate is fixedly connected with the box body, the inner wall of the fixing plate is connected with a screw rod in a rotating mode, the left end of the screw rod sequentially penetrates through the fixing plate and the box body and extends to the left side of the box body, two sliders connected with threads of the screw rod are sleeved on the screw rod, and the bottoms of the sliders are fixedly connected with the two connecting devices respectively.
As a further description of the above technical solution:
the connecting device comprises a connecting pipe, the top of the connecting pipe is fixedly connected with the sliding block, the connecting pipe is sleeved on the oil pipe, and a sealing structure is arranged on the connecting pipe.
As a further description of the above technical solution:
the sealing structure comprises a sealing groove, the sealing groove is formed in the connecting pipe, a sealing plug is fixedly connected to the inner wall of the sealing groove, and a through hole is formed in the sealing plug.
As a further description of the above technical solution:
the positioning device comprises a lifting plate, the left side and the right side of the lifting plate are fixedly connected with lifting blocks, two sliding grooves are formed in the inner wall of the box body, the outer side of each lifting block is connected with the inner wall of each sliding groove in a sliding mode, the outer side of each lifting block is connected with the corresponding spring in a fixed mode, the bottom of each lifting block is fixedly connected with the corresponding spring, the other end of each spring is fixedly connected with the inner wall of each sliding groove, two mounting holes are formed in the lifting plate, and the inner walls of the mounting holes are in contact with the filter.
As a further description of the above technical solution:
the top fixedly connected with diaphragm of lifter plate, the oil storage tank has been seted up at the top of diaphragm.
As a further description of the above technical solution:
the filter is including the installation pipe, the bottom intercommunication of installation pipe has dewatering filter core and edulcoration filter core, the bottom of dewatering filter core and edulcoration filter core contacts with the inner wall of two mounting holes respectively.
As a further description of the above technical solution:
the connector has all been seted up at both ends about the installation pipe, two the inner wall of connector all inlays and is equipped with two sealing washers.
Compared with the prior art, the utility model has the advantages of:
(1) the scheme can provide stable support for the whole device through the box body, when the device is used, the filter is firstly placed into the positioning device, then the positioning device can position the filter, the input end and the output end of the filter are respectively aligned with the two connecting devices, then the driving device is started to drive the two connecting devices to move towards opposite directions until the two connecting devices are sleeved on the filter, the filter can be installed, then the oil pump can be started when the controller in the control cabinet can select, the oil pump can pump the switching oil into the oil pipe and then convey the switching oil into the filter through the oil pipe, the filter can absorb impurities and moisture in the switching oil, the impurities and the moisture in the switching oil can be discharged through another oil pipe after the absorption is finished, the filtering of the switching oil is further finished, after the device is used for a period of time, the impurities can be remained in the filter, at this moment, only need reverse start-up drive arrangement, drive arrangement can drive two connecting device and keep away from each other, and connecting device breaks away from behind the filter, can accomplish the dismantlement to the filter, and the user can take out the filter after that and wash the change, and the in-process is very convenient and fast, and the device can convenient and fast's completion to the dismantlement and the installation of filter, and then saves the time that the user changed, improves the practicality of device.
(2) This scheme need be when installing the filter, only need rotate the lead screw, the lead screw can drive two sliders and be close to each other along the inner wall of fixed plate, the slider can drive two connecting device and remove to relative direction at gliding in-process, until two connecting device embolia on the filter, can realize the installation to the filter, and when needing to dismantle the filter, then the antiport lead screw, the lead screw can drive two sliders and keep away from each other along the inner wall of fixed plate, connecting device can break away from the filter after that, and then the completion is to the dismantlement of filter.
(3) This scheme is when installing the filter, and the slider can drive two connecting pipes at gliding in-process and remove to the opposite direction, and the connecting pipe can drive seal structure after that and aim at the input and the output of filter and remove, and two seal structure embolia behind the input and the output of filter, can accomplish the connection to the filter, and seal structure can seal connecting pipe and filter, avoids the switch oil to expose through the gap, improves the practicality of device.
(4) After two connecting pipes of this scheme removed to relative direction, the sealing plug can insert the filter at first, and then plays certain sealed effect, and then the filter can insert in the seal groove, and then further seals the filter, avoids the switch oil to expose through the gap, improves the practicality of device.
(5) This scheme is when using, at first puts into the mounting hole with the filter, and the elasticity through the spring can drive two elevator blocks along the inner wall rebound of spout after that, and up to the top of elevator block and the interior roof contact of spout, the input and the output of filter align with two connecting pipes respectively this moment, and then accomplish the location to the filter.
(6) The oil storage tank that this scheme was seted up through the diaphragm top can be collected inside the filter and the inside remaining switch oil of oil pipe, and then avoids when dismantling the filter, switch oil pollution box, and the person of facilitating the use cleans, improves the practicality of device.
(7) This scheme installation pipe can be used for installing dewatering filter core and edulcoration filter core, both ends can be used for being connected with the connecting pipe about the installation pipe after that, two connecting pipes remove the back to relative direction, the sealing plug can insert at first on the inner wall of installation pipe, and then play certain sealed effect, the installation pipe can insert in the seal groove after that, and then further seal the filter, avoid the switching oil to expose through the gap, improve device's practicality, when using, the switching oil passes through oil pipe and carries in the installation pipe, oil in the installation pipe loops through dewatering filter core and edulcoration filter core, dewatering filter core and edulcoration filter core can absorb impurity and moisture in the switching oil, can discharge through another oil pipe after the absorption is accomplished, and then accomplish the filtration to the switching oil.
(8) The connector that both ends were all seted up about this scheme installation pipe can be used for being connected with the sealing plug and play sealed effect, and the connector inner wall inlays the sealed effect that two sealing washers established can strengthen between seal groove and the connector after that, and further avoiding switch oil to expose through the gap, the practicality of improving the device.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a formal sectional view of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;
fig. 4 is a subjective view of the middle sealing structure of the present invention.
The reference numbers in the figures illustrate:
1. a box body; 2. an oil pipe; 3. an oil pump; 4. a control cabinet; 5. a drive device; 501. a fixing plate; 502. a screw rod; 503. a slider; 6. a connecting device; 601. a connecting pipe; 602. a sealing structure; 61. a sealing groove; 62. a sealing plug; 63. a through hole; 7. a positioning device; 701. a lifting plate; 702. a lifting block; 703. a chute; 704. a spring; 705. mounting holes; 8. a filter; 801. installing a pipe; 802. a dewatering filter element; 803. removing impurities and filtering the filter element; 9. a transverse plate; 10. an oil storage tank; 11. a connecting port; 12. and (5) sealing rings.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention;
please refer to fig. 1-4, in the utility model, an online oil filter of transformer on-load tap-changer, including box 1, the grafting intercommunication has two oil pipe 2 on the box 1, and fixed mounting has oil pump 3 on the oil pipe 2 at top, and switch board 4 is installed to the inner wall of box 1, is provided with drive arrangement 5 on the box 1, and drive arrangement 5's bottom is connected with two connecting device 6, and two mutually opposite ends of two connecting device 6 overlap respectively and locate two oil pipe 2 on, are provided with positioner 7 on the box 1, and the filter 8 is pegged graft at positioner 7's top.
In the utility model, the whole device can be stably supported through the box body 1, when in use, the filter 8 is firstly put into the positioning device 7, then the positioning device 7 can position the filter 8, at the moment, the input end and the output end of the filter 8 are respectively aligned with the two connecting devices 6, then the driving device 5 is started to drive the two connecting devices 6 to move towards opposite directions, until the two connecting devices 6 are sleeved on the filter 8, the installation of the filter 8 can be realized, then the oil pump 3 can be started through the controller in the control cabinet 4 when being selected, the oil pump 3 can pump the switch oil into the oil pipe 2 and then convey the switch oil into the filter 8 through the oil pipe 2, the filter 8 can absorb impurities and moisture in the switch oil, the switch oil can be discharged through another oil pipe 2 after the absorption is finished, and then the filtration of the switch oil is finished, after using a period, filter 8 is inside can remain impurity, at this moment, only need reverse start drive arrangement 5, drive arrangement 5 can drive two connecting device 6 and keep away from each other, connecting device 6 breaks away from behind filter 8, can accomplish the dismantlement to filter 8, the user can take out filter 8 after that and wash the change, very convenient and fast of in-process, completion that the device can convenient and fast to filter 8 dismantles and installs, and then the time of saving the user and changing, improve the practicality of device.
Please refer to fig. 2 and fig. 3, wherein: the driving device 5 comprises a fixing plate 501, the outer side of the fixing plate 501 is fixedly connected with the box body 1, the inner wall of the fixing plate 501 is rotatably connected with a screw rod 502, the left end of the screw rod 502 sequentially penetrates through the fixing plate 501 and the box body 1 and extends to the left side of the box body 1, two sliders 503 in threaded connection with the screw rod 502 are sleeved on the screw rod 502, and the bottoms of the two sliders 503 are respectively fixedly connected with the two connecting devices 6.
The utility model discloses in, when needing to install filter 8, only need rotate lead screw 502, lead screw 502 can drive two sliders 503 and be close to each other along fixed plate 501's inner wall, slider 503 can drive two connecting device 6 and remove to the relative direction at gliding in-process, until two connecting device 6 embolia on filter 8, can realize the installation to filter 8, and when needing to dismantle filter 8, then the antiport lead screw 502, lead screw 502 can drive two sliders 503 and keep away from each other along fixed plate 501's inner wall, connecting device 6 can break away from filter 8 after that, and then accomplish the dismantlement to filter 8.
Please refer to fig. 2-4, wherein: the connecting device 6 comprises a connecting pipe 601, the top of the connecting pipe 601 is fixedly connected with the sliding block 503, the connecting pipe 601 is sleeved on the oil pipe 2, and a sealing structure 602 is arranged on the connecting pipe 601.
The utility model discloses in, when installing filter 8, slider 503 can drive two connecting pipes 601 and remove to the relative direction at gliding in-process, connecting pipe 601 can drive seal structure 602 and aim at the input and the output of filter 8 after that and remove, two seal structure 602 embolia behind the input and the output of filter 8, can accomplish the connection to filter 8, and seal structure 602 can seal connecting pipe 601 and filter 8, avoid the switch oil to expose through the gap, improve device's practicality.
Please refer to fig. 2-4, wherein: the sealing structure 602 includes a sealing groove 61, the sealing groove 61 is opened on the connecting pipe 601, the inner wall of the sealing groove 61 is fixedly connected with a sealing plug 62, and a through hole 63 is opened on the sealing plug 62.
The utility model discloses in, two connecting pipes 601 remove the back to relative direction, and sealing plug 62 can be at first inserted filter 8 last, and then plays certain sealed effect, and then filter 8 can insert in seal groove 61, and then further seals filter 8, avoids the switch oil to expose through the gap, improves the practicality of device.
Please refer to fig. 2, in which: the positioning device 7 comprises a lifting plate 701, the lifting blocks 702 are fixedly connected to the left side and the right side of the lifting plate 701 respectively, two sliding grooves 703 are formed in the inner wall of the box body 1, the outer sides of the two lifting blocks 702 are connected with the inner walls of the two sliding grooves 703 in a sliding mode respectively, springs 704 are fixedly connected to the bottoms of the two lifting blocks 702 respectively, the other ends of the springs 704 are fixedly connected with the inner walls of the two sliding grooves 703 respectively, two mounting holes 705 are formed in the lifting plate 701, and the inner walls of the two mounting holes 705 are in contact with the filter 8.
The utility model discloses in, when using, at first put into mounting hole 705 with filter 8 in, the elasticity through spring 704 can drive two elevator 702 along the inner wall rebound of spout 703 after that, and the top of elevator 702 and the interior roof contact of spout 703, filter 8's input and output align with two connecting pipes 601 respectively this moment, and then accomplish the location to filter 8.
Please refer to fig. 3, in which: the top of lifter plate 701 is fixedly connected with diaphragm 9, and oil storage tank 10 has been seted up at the top of diaphragm 9.
The utility model discloses in, the oil storage tank 10 seted up through diaphragm 9 top can be collected filter 8 inside and the inside remaining switch oil of oil pipe 2, and then avoids when dismantling filter 8, and switch oil pollutes box 1, and the person of facilitating the use cleans, improves device's practicality.
Please refer to fig. 2, in which: the filter 8 comprises an installation pipe 801, the bottom of the installation pipe 801 is communicated with a water removal filter element 802 and an impurity removal filter element 803, and the bottoms of the water removal filter element 802 and the impurity removal filter element 803 are respectively contacted with the inner walls of two installation holes 705.
The utility model discloses in, installation pipe 801 can be used for installing dewatering filter core 802 and edulcoration filter core 803 core, both ends can be used for being connected with connecting pipe 601 about installation pipe 801 then, two connecting pipes 601 remove the back to relative direction, sealing plug 62 can at first insert on the inner wall of installation pipe 801, and then play certain sealed effect, installation pipe 801 can insert in the seal groove 61 after that, and then further to seal filter 8, avoid the switching oil to expose through the gap, improve the practicality of device, when using, the switching oil passes through oil pipe 2 and carries in the installation pipe 801, oil in the installation pipe 801 loops through dewatering filter core 802 and edulcoration filter core 803, dewatering filter core 802 and edulcoration filter core 803 can absorb impurity and moisture in the switching oil, can discharge through another oil pipe 2 after the absorption is accomplished, and then accomplish the filtration to the switching oil.
Please refer to fig. 3, in which: connectors 11 have all been seted up at both ends about installation pipe 801, and two sealing washer 12 have all been inlayed to the inner wall of two connectors 11.
The utility model discloses in, the connector 11 that both ends were all seted up about installation pipe 801 can be used for being connected sealed effect with sealing plug 62, and the sealed effect between seal groove 61 and the connector 11 can be strengthened to two sealing washer 12 that the connector 11 inner wall was inlayed and is established after that, and further avoiding the switching oil to expose through the gap, improve device's practicality.
The working principle is as follows: when the device is used, firstly, the water removal filter element 802 and the impurity removal filter element 803 are placed into the mounting hole 705, and then the filter 8 is fixed, the elastic force of the spring 704 drives the two lifting blocks 702 to move upwards along the inner wall of the chute 703 until the top of the lifting block 702 is contacted with the inner top wall of the chute 703, at this time, the input end and the output end of the filter 8 are respectively aligned with the two connecting pipes 601, and then the filter 8 is positioned, then the screw rod 502 is rotated, the screw rod 502 drives the two sliding blocks 503 to mutually approach along the inner wall of the fixing plate 501, the sliding blocks 503 can drive the two connecting devices 6 to move towards opposite directions in the sliding process until the two connecting devices 6 are arranged on the filter 8, and then the filter 8 can be mounted, then the oil pump 3 can be started when selected by a controller in the control cabinet 4, the oil pump 3 can pump the switch oil into the oil pipe 2, carry in filter 8 through oil pipe 2 after that, filter 8 can absorb impurity and moisture in the switching oil, can discharge through another oil pipe 2 after the absorption is accomplished, and then accomplish the filtration to the switching oil, use after a period of time, filter 8 is inside can remain impurity, at this moment, when needing to dismantle filter 8, then antiport lead screw 502, lead screw 502 can drive two sliders 503 and keep away from each other along the inner wall of fixed plate 501, connecting device 6 can break away from filter 8 after that, and then accomplish the dismantlement to filter 8, the user can take out filter 8 and wash the change after that, the in-process is very convenient and fast, the device can convenient and fast completion to filter 8 dismantle and the installation, and then save the time that the user changed, the practicality of the improvement device.
The above is only a preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.
Claims (8)
1. The utility model provides an online oil filter of transformer on-load tap-changer, includes box (1), its characterized in that: the oil pump oil filter is characterized in that two oil pipes (2) are connected to the box body (1) in an inserting mode, an oil pump (3) is fixedly mounted on the oil pipes (2) at the top, a control cabinet (4) is mounted on the inner wall of the box body (1), a driving device (5) is arranged on the box body (1), two connecting devices (6) are connected to the bottom of the driving device (5), two ends of the connecting devices (6), which are opposite to each other, are sleeved on the two oil pipes (2) respectively, a positioning device (7) is arranged on the box body (1), and a filter (8) is connected to the top of the positioning device (7) in an inserting mode.
2. The on-line oil filter of the on-load tap-changer of the transformer according to claim 1, characterized in that: drive arrangement (5) are including fixed plate (501), the outside and box (1) fixed connection of fixed plate (501), the inner wall of fixed plate (501) rotates and is connected with lead screw (502), the left end of lead screw (502) runs through fixed plate (501) and box (1) in proper order and extends to the left side of box (1), the cover is equipped with two slider (503) rather than threaded connection on lead screw (502), two the bottom of slider (503) respectively with two connecting device (6) fixed connection.
3. The on-line oil filter of the on-load tap-changer of the transformer according to claim 2, characterized in that: the connecting device (6) comprises a connecting pipe (601), the top of the connecting pipe (601) is fixedly connected with the sliding block (503), the connecting pipe (601) is sleeved on the oil pipe (2), and a sealing structure (602) is arranged on the connecting pipe (601).
4. The on-line oil filter of the on-load tap-changer of the transformer according to claim 3, characterized in that: seal structure (602) includes seal groove (61), seal groove (61) are seted up on connecting pipe (601), the inner wall fixedly connected with sealing plug (62) of seal groove (61), through-hole (63) have been seted up on sealing plug (62).
5. The on-line oil filter of the on-load tap-changer of the transformer according to claim 1, characterized in that: the positioning device (7) comprises a lifting plate (701), the left side and the right side of the lifting plate (701) are fixedly connected with lifting blocks (702), two sliding grooves (703) are formed in the inner wall of the box body (1), the outer sides of the lifting blocks (702) are respectively in sliding connection with the inner walls of the two sliding grooves (703), two springs (704) are fixedly connected to the bottom of the lifting blocks (702), the other ends of the springs (704) are respectively in fixed connection with the inner walls of the two sliding grooves (703), two mounting holes (705) are formed in the lifting plate (701), and the inner walls of the mounting holes (705) are in contact with the filter (8).
6. The on-line oil filter of the on-load tap-changer of the transformer according to claim 5, characterized in that: the top fixedly connected with diaphragm (9) of lifter plate (701), oil storage tank (10) have been seted up at the top of diaphragm (9).
7. The on-line oil filter of the on-load tap-changer of the transformer according to claim 5, characterized in that: the filter (8) comprises an installation pipe (801), the bottom of the installation pipe (801) is communicated with a water removal filter element (802) and an impurity removal filter element (803), and the bottoms of the water removal filter element (802) and the impurity removal filter element (803) are respectively contacted with the inner walls of two installation holes (705).
8. The on-line oil filter of the on-load tap-changer of the transformer according to claim 7, characterized in that: the left end and the right end of the installation pipe (801) are both provided with connectors (11), and the inner walls of the connectors (11) are both embedded with two sealing rings (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121380061.7U CN215026666U (en) | 2021-06-21 | 2021-06-21 | On-line oil filter for on-load tap-changer of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121380061.7U CN215026666U (en) | 2021-06-21 | 2021-06-21 | On-line oil filter for on-load tap-changer of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215026666U true CN215026666U (en) | 2021-12-07 |
Family
ID=79200875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121380061.7U Expired - Fee Related CN215026666U (en) | 2021-06-21 | 2021-06-21 | On-line oil filter for on-load tap-changer of transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215026666U (en) |
-
2021
- 2021-06-21 CN CN202121380061.7U patent/CN215026666U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |