CN211556852U - SF6 gas insulation totally enclosed type neutral point intelligent protection device - Google Patents
SF6 gas insulation totally enclosed type neutral point intelligent protection device Download PDFInfo
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- CN211556852U CN211556852U CN202020281174.0U CN202020281174U CN211556852U CN 211556852 U CN211556852 U CN 211556852U CN 202020281174 U CN202020281174 U CN 202020281174U CN 211556852 U CN211556852 U CN 211556852U
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- metal shell
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- alternating current
- current transformer
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 17
- 238000009413 insulation Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 239000002184 metal Substances 0.000 claims abstract description 63
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 238000009434 installation Methods 0.000 claims description 21
- 238000012806 monitoring device Methods 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
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- 230000002035 prolonged effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of the transformer technique and specifically relates to a SF6 gas insulation totally enclosed neutral point intelligent protection device is related to. The utility model provides a SF6 gas insulation totally enclosed neutral point intelligence protection device which characterized in that: the three-station isolation switch comprises a metal shell and a main grounding grid, wherein a closed cavity is formed in the metal shell, and an incoming line wiring terminal, a three-station isolation switch, a lightning arrester, a discharge gap, a first alternating current transformer and a second alternating current transformer are arranged in the closed cavity of the metal shell; SF6 insulating gas is filled in the sealed cavity; the utility model discloses a central point protection device's stability is good, and adaptive environment ability is strong.
Description
Technical Field
The utility model belongs to the technical field of the transformer technique and specifically relates to a SF6 gas insulation totally enclosed neutral point intelligent protection device is related to.
Background
At present, in transformer technical field, to transformer alternating current neutral point complete set protection device field, then still adopt traditional product structure, the device generally comprises isolator, arrester, protection clearance, electrical components such as current transformer, has following problem usually:
1. in a natural environment, the electronic element has low working reliability, and the discharge gap is easily influenced by external environments such as humidity, altitude and other factors, so that even under the same voltage level, the electrode distance of the discharge gap also needs to be calibrated and adjusted by professionals according to the field use environment;
2. the traditional open products are exposed in the air, belong to live equipment during operation, and need to keep a safe distance according to the regulation requirements of corresponding voltage levels;
3. the electric arc exposes and uses the air as insulating and arc extinguishing medium, the electric arc of the discharge gap is extinguished by the nature, the time of arcing is long, the energy of the electric arc is large, it is easy to cause the fire or explosion, it is easy to form the injury to the power station and apparatus and operation maintenance personnel;
4. the existing transformer alternating current neutral point complete protection device is inconvenient to move and transport in the installation process.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art existence, the utility model aims to provide a SF6 gas insulation totally enclosed neutral point intelligence protection device.
The technical scheme of the utility model is realized like this: the utility model provides a SF6 gas insulation totally enclosed neutral point intelligence protection device which characterized in that: the three-station isolation switch comprises a metal shell and a main grounding grid, wherein a closed cavity is formed in the metal shell, and an incoming line wiring terminal, a three-station isolation switch, a lightning arrester, a discharge gap, a first alternating current transformer and a second alternating current transformer are arranged in the closed cavity of the metal shell; the input terminal of the incoming line wiring terminal is connected with a 110-330 kV main transformer, the output end of the incoming line wiring terminal is connected with a three-station isolating switch through a leading electric pole, the three-station isolating switch is sequentially connected with a discharge gap and a first alternating current transformer in series through a first output terminal by utilizing a first conducting rod, and the output end of the first alternating current transformer is connected to the main grounding grid; the three-station isolating switch is connected with a second alternating current transformer through a second output terminal by using a second conducting rod, and the other end of the second alternating current transformer is connected to the main grounding grid; the three-station isolating switch is connected with a lightning arrester through a third output terminal by using a third conducting rod, and the other end of the lightning arrester is connected to the main grounding grid; SF6 insulating gas is filled in the sealed cavity; the metal shell is detachably provided with a plurality of moving components through a plurality of mounting seats; the mounting seat comprises a mounting plate and a stiffening plate; the bevel edge of the mounting plate is fixedly mounted on the metal shell, and a mounting hole is formed in a panel of the mounting plate; the stiffening plate is fixedly arranged at the joint of the mounting plate and the metal shell; the moving assembly comprises a connecting rod, a clamping ring sleeved on the connecting rod, a fastening ring and rolling pieces detachably arranged at two ends of the connecting rod; the outer wall of one end of the connecting rod is provided with a thread; the fastening ring is in threaded connection with the connecting rod; connecting rod one end passes the mounting hole on the mounting panel, and carries on spacingly through snap ring and tighrening ring through the mounting hole both sides.
Preferably: the rolling part comprises a lantern ring, a roller and a roller frame, and the roller is rotatably arranged at the bottom of the roller frame; the lantern ring is fixedly arranged on the upper end surface of the roller carrier; threaded holes are formed in the lantern ring, and fastening bolts are rotatably mounted in the threaded holes.
Preferably: and the metal shell is provided with a grounding bar for grounding the metal shell.
Preferably: the metal shell is fixedly provided with an installation underframe, and the installation underframe is provided with an operating system which has a remote terminal control function and is used for controlling the work of the three-station isolating switch; and the operating system is connected with the three-station isolating switch.
Preferably: and an SF6 gas filling port for filling SF6 insulating gas into the closed cavity is arranged on the metal shell.
Preferably: and the metal shell is provided with an explosion-proof air leakage port for preventing the air pressure in the sealed cavity from being overlarge.
Preferably: install SF6 gas monitoring device and partial discharge monitoring device on metal casing's the airtight intracavity wall, SF6 gas monitoring device and partial discharge monitoring device all connect in operating system, SF6 gas monitoring device include SF6 density relay or SF6 gas monitoring sensor.
Compared with the prior art, the utility model discloses the beneficial effect who brings does:
1. by arranging all the electrons and the elements in the sealed cavity and not contacting with the outside air, the oxidation aging of the electronic elements can be realized, the service life of the electronic elements is prolonged, and then, the discharge gap is arranged in the sealed cavity, and the influence of the external environment (factors such as humidity, altitude and the like) on the discharge gap is isolated by a fully-closed structure, so that the electrode distance of the discharge gap does not need to be calibrated and adjusted by a professional according to the field use environment in the same voltage level; the labor is saved;
the outer wall of the metal shell is provided with the moving assembly through the mounting seat, when the metal shell needs to be moved and carried in the mounting process, the moving assembly can be mounted on the metal shell, and the moving assemblies are provided with a plurality of groups and are longitudinally and uniformly mounted on the metal shell, so that the metal shell and the inner parts of the metal shell can not be easily moved to a required position through the moving assembly;
in addition, the external environment is not easy to evaluate and has larger change along with time, so that accurate calibration is difficult, the discharge gap is arranged in the closed cavity, the controllable motor distance between the discharge gaps can be ensured to be more accurate without generating fluctuation in the working environment, and the safety performance of the equipment is improved;
secondly, the electric arc is placed in a sealed cavity filled with SF6 gas, SF6 gas is used as an insulating and arc extinguishing medium, the arc burning time is short, the electric arc energy is low, a fire or explosion cannot be caused, no harm is caused to power station equipment and operation and maintenance personnel, and the safety performance of operation is improved; and all install in metal casing through individual electronic component, improve its compact structure nature, help reducing the volume of device body, installation procedure when can reduce outdoor installation simultaneously makes the installation more convenient.
2. All devices are sealed in the metal tank body, and the metal tank body is well grounded, so that the shell of the device can be safely touched, and the safety performance is further improved;
in addition, all the devices are sealed in the metal tank body, and the metal tank body is a one-step cast product made of high-quality alloy aluminum, so that the metal tank body is not influenced by the external environment and has high strength and high corrosion resistance.
3. The installation underframe is directly installed on the metal shell, and the complete production mode has the effect that the equipment can be directly installed after being transported to the ground, so that on-site assembly and debugging are not needed, the installation efficiency is improved, and the installation time is saved;
in addition, through installing the operating system that has remote terminal control function, operating system and three station isolator interconnect, the staff can pass through the three station isolator positions of operating system remote adjustment to this opening and shutting of control circuit as required realizes remote communication's effect.
4. Through being provided with gaseous monitoring devices of SF6 and partial discharge monitoring devices, can realize the decomposition content to SF6 insulating gas, density pressure's on-line monitoring and trend diagnosis to know the internal situation, and when meetting density pressure and being less than operating pressure, send early warning signal, with this, improve the installation performance, also do benefit to quick maintenance and maintenance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is a right side view of FIG. 1;
FIG. 3 is a system diagram;
fig. 4 is a schematic structural diagram of the moving assembly.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
As shown in fig. 1-4, the utility model discloses an SF6 gas insulation totally enclosed neutral point intelligent protection device, in the embodiment of the utility model, including a metal shell 1 and a main grounding grid 2, inside of which is provided with an enclosed cavity 11, the enclosed cavity 11 of the metal shell 1 is provided with an incoming line wiring terminal 12, a three-station isolating switch 13, a lightning arrester 14, a discharge gap 15, a first ac transformer 16 and a second ac transformer 17; the input terminal of the incoming line wiring terminal 12 is connected with a 330kV main transformer 18, the output end of the incoming line wiring terminal 12 is connected with a three-station isolating switch 13 through a leading electric pole 19, the three-station isolating switch 13 is sequentially connected with a discharge gap 15 and a first alternating current transformer 16 in series through a first output terminal by utilizing a first conducting pole, and the output end of the first alternating current transformer 16 is connected to the main grounding grid 2; the three-station isolating switch 13 is connected with a second alternating current transformer 17 through a second output terminal by using a second conducting rod, and the other end of the second alternating current transformer 17 is connected to the main grounding grid 2; the three-position isolating switch 13 is connected with an arrester 14 through a third output terminal by using a third conducting rod, and the other end of the arrester 14 is connected to the main grounding grid 2; SF6 insulating gas is filled in the closed cavity 11; a plurality of movable assemblies 9 are detachably mounted on the metal shell 1 through a plurality of mounting seats 10; the mounting seat 10 comprises a mounting plate 101 and a stiffening plate 102; the bevel edge of the mounting plate 101 is fixedly mounted on the metal shell 1, and a mounting hole is formed in the panel of the mounting plate 101; the stiffening plate 102 is fixedly arranged at the joint of the mounting plate 101 and the metal shell 1; the moving assembly 9 comprises a connecting rod 91, a clamping ring 92 sleeved on the connecting rod 91, a fastening ring 93 and rolling pieces 94 detachably mounted at two ends of the connecting rod 91; the outer wall of one end of the connecting rod 91 is provided with a thread; the fastening ring 93 is in threaded connection with the connecting rod 91; the mounting hole on the mounting panel 101 is passed to connecting rod 91 one end, and carries on spacingly through snap ring 92 and tighrening ring 93 through the mounting hole both sides.
In the embodiment of the present invention, the rolling member 94 includes a collar 941, a roller 942, and a roller frame 943, the roller 942 is rotatably disposed at the bottom of the roller frame 943; the lantern ring 941 is fixedly installed on the upper end face of the roller frame 943; a threaded hole is formed in the collar 941, and a fastening bolt 944 is rotatably mounted in the threaded hole.
In the specific embodiment of the present invention, the metal shell 1 is provided with a grounding bar 4 for grounding the metal shell 1.
In the embodiment of the present invention, the metal casing 1 is provided with an SF6 gas filling port 6 for filling an SF6 insulating gas into the sealed cavity 11.
In the specific embodiment of the present invention, the metal casing 1 is provided with an explosion-proof air leakage opening 7 for preventing the air pressure inside the airtight cavity 11 from being too large.
By adopting the technical scheme, all the electrons and the elements are arranged in the sealed cavity and do not contact with the outside air, so that the oxidation aging of the electronic elements can be realized, the service life of the electronic elements is prolonged, and secondly, the discharge gap is arranged in the sealed cavity, and the influence of the external environment (factors such as humidity, altitude and the like) on the discharge gap is isolated by the totally-closed structure, so that the electrode distance of the discharge gap does not need to be calibrated and adjusted by professional personnel according to the field use environment under the same voltage level; the labor is saved;
the outer wall of the metal shell is provided with the moving assembly through the mounting seat, when the metal shell needs to be moved and carried in the mounting process, the moving assembly can be mounted on the metal shell, and the moving assemblies are provided with a plurality of groups and are longitudinally and uniformly mounted on the metal shell, so that the metal shell and the inner parts of the metal shell can not be easily moved to a required position through the moving assembly;
the installation mode of the movable assembly is as follows: the connecting column penetrates through the through hole of the mounting seat along one end with the thread, then the end with the thread is rotatably sleeved with the fastening ring, the connecting column is mounted on the mounting seat through the fastening ring and the clamping ring, then the roller frame and the rollers are sleeved at two ends of the connecting column through the lantern ring, and the connecting column is screwed tightly through the fastening thread.
In addition, the external environment is not easy to evaluate and has larger change along with time, so that accurate calibration is difficult, the discharge gap is arranged in the closed cavity, the controllable motor distance between the discharge gaps can be ensured to be more accurate without generating fluctuation in the working environment, and the safety performance of the equipment is improved; the electronic elements are all arranged in the metal shell, so that the structural compactness of the device is improved, the volume of the device body is reduced, and meanwhile, the installation procedures during outdoor installation can be reduced, so that the installation is more convenient;
and secondly, the electric arc is placed in a sealed cavity filled with SF6 gas, SF6 gas is used as an insulating and arc extinguishing medium, the arcing time is short, the electric arc energy is low, a fire or explosion cannot be caused, no harm can be caused to power station equipment and operation and maintenance personnel, and the safety performance of operation is improved.
Thirdly, all devices are sealed in the metal tank body, and the metal tank body is well grounded, so that the shell of the device can be safely touched, and the safety performance is further improved;
fourthly, all the devices are sealed in the metal tank body, and the metal tank body is a one-step cast product of high-quality alloy aluminum, is not influenced by the external environment and has high strength and high corrosion resistance.
It should be noted that, 1, the closing position of the main fracture of the isolating switch is switched on, 2, the isolating position of the main fracture is separated, and 3, the grounding position of the grounding side; the three-position isolating switch is a closed knife, and the working position of the closed knife is unique at a certain moment; therefore, the lightning arrester can be replaced by the equipment in an environment without power failure; when the equipment is in operation, if the lightning arrester has a fault, the isolation can be opened at the grounding position, SF6 insulating gas is pumped out, and the lightning arrester is replaced. And after the replacement is finished, filling SF6 insulating gas for insulation protection, and putting into operation.
Example 2 differs from example 1 in that
As shown in fig. 1, in the embodiment of the present invention, an installation chassis 5 is fixedly installed on the metal shell 1, and an operating system 51 having a remote terminal control function and used for controlling the operation of the three-position disconnecting switch 13 is installed on the installation chassis 5; the operating system 52 is connected to the three-position disconnector 13.
By adopting the technical scheme, the installation underframe is directly installed on the metal shell, and the complete production mode has the effect that the equipment can be directly installed after being transported to the ground, so that field assembly and debugging are not needed, the installation efficiency is improved, and the installation time is saved;
in addition, through installing the operating system that has remote terminal control function, operating system and three station isolator interconnect, the staff can pass through the three station isolator positions of operating system remote adjustment to this opening and shutting of control circuit as required realizes remote communication's effect.
Example 3 differs from example 2 in that
As shown in fig. 2, in the embodiment of the present invention, the closed cavity 11 of the metal casing 1 is provided with an SF6 gas monitoring device 81 and a partial discharge monitoring device 82 on the inner wall thereof, the SF6 gas monitoring device 81 and the partial discharge monitoring device 82 are both connected to the operating system 51, and the SF6 gas monitoring device 81 includes an SF6 density relay 811 or an SF6 gas monitoring sensor 812.
Through adopting above-mentioned technical scheme, through being provided with gaseous monitoring devices of SF6 and partial discharge monitoring devices, can realize the decomposition content to SF6 insulating gas, density pressure's on-line monitoring and trend diagnosis to in understanding the internal situation, and when meetting density pressure and being less than operating pressure, send early warning signal, with this, improve the installation performance, also do benefit to quick maintenance and maintenance.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides a SF6 gas insulation totally enclosed neutral point intelligence protection device which characterized in that: the three-station isolation switch comprises a metal shell and a main grounding grid, wherein a closed cavity is formed in the metal shell, and an incoming line wiring terminal, a three-station isolation switch, a lightning arrester, a discharge gap, a first alternating current transformer and a second alternating current transformer are arranged in the closed cavity of the metal shell; the input terminal of the incoming line wiring terminal is connected with a 110-330 kV main transformer, the output end of the incoming line wiring terminal is connected with a three-station isolating switch through a leading electric pole, the three-station isolating switch is sequentially connected with the discharge gap and a first alternating current transformer in series through a first output terminal by utilizing a first conducting rod, and the output end of the first alternating current transformer is connected to the main grounding grid; the three-station isolating switch is connected with a second alternating current transformer through a second output terminal by using a second conducting rod, and the other end of the second alternating current transformer is connected to the main grounding grid; the three-station isolating switch is connected with the lightning arrester through a third output terminal by using a third conducting rod, and the other end of the lightning arrester is connected to the main grounding grid; SF6 insulating gas is filled in the sealed cavity; the metal shell is detachably provided with a plurality of moving components through a plurality of mounting seats; the mounting seat comprises a mounting plate and a stiffening plate; the bevel edge of the mounting plate is fixedly mounted on the metal shell, and a mounting hole is formed in a panel of the mounting plate; the stiffening plate is fixedly arranged at the joint of the mounting plate and the metal shell; the moving assembly comprises a connecting rod, a clamping ring sleeved on the connecting rod, a fastening ring and rolling pieces detachably arranged at two ends of the connecting rod; the outer wall of one end of the connecting rod is provided with a thread; the fastening ring is in threaded connection with the connecting rod; connecting rod one end passes the mounting hole on the mounting panel, and carries on spacingly through snap ring and tighrening ring through the mounting hole both sides.
2. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: the rolling part comprises a lantern ring, a roller and a roller frame, and the roller is rotatably arranged at the bottom of the roller frame; the lantern ring is fixedly arranged on the upper end surface of the roller carrier; threaded holes are formed in the lantern ring, and fastening bolts are rotatably mounted in the threaded holes.
3. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: and the metal shell is provided with a grounding bar for grounding the metal shell.
4. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: the metal shell is fixedly provided with an installation underframe, and the installation underframe is provided with an operating system which has a remote terminal control function and is used for controlling the work of the three-station isolating switch; and the operating system is connected with the three-station isolating switch.
5. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: and an SF6 gas filling port for filling SF6 insulating gas into the closed cavity is arranged on the metal shell.
6. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: and the metal shell is provided with an explosion-proof air leakage port for preventing the air pressure in the sealed cavity from being overlarge.
7. The SF6 gas insulated fully enclosed neutral intelligent protection device of claim 1, wherein: install SF6 gas monitoring device and partial discharge monitoring device on metal casing's the airtight intracavity wall, SF6 gas monitoring device and partial discharge monitoring device all connect in operating system, SF6 gas monitoring device include SF6 density relay or SF6 gas monitoring sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281174.0U CN211556852U (en) | 2020-03-09 | 2020-03-09 | SF6 gas insulation totally enclosed type neutral point intelligent protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281174.0U CN211556852U (en) | 2020-03-09 | 2020-03-09 | SF6 gas insulation totally enclosed type neutral point intelligent protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211556852U true CN211556852U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020281174.0U Expired - Fee Related CN211556852U (en) | 2020-03-09 | 2020-03-09 | SF6 gas insulation totally enclosed type neutral point intelligent protection device |
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| Country | Link |
|---|---|
| CN (1) | CN211556852U (en) |
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2020
- 2020-03-09 CN CN202020281174.0U patent/CN211556852U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 |
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| CF01 | Termination of patent right due to non-payment of annual fee |