CN217034988U - Simulation training device for crude tin refining pot - Google Patents
Simulation training device for crude tin refining pot Download PDFInfo
- Publication number
- CN217034988U CN217034988U CN202220054618.6U CN202220054618U CN217034988U CN 217034988 U CN217034988 U CN 217034988U CN 202220054618 U CN202220054618 U CN 202220054618U CN 217034988 U CN217034988 U CN 217034988U
- Authority
- CN
- China
- Prior art keywords
- simulation
- furnace body
- crude tin
- baffle
- stove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000004088 simulation Methods 0.000 title claims abstract description 37
- 238000012549 training Methods 0.000 title claims abstract description 30
- 238000007670 refining Methods 0.000 title claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000000779 smoke Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000010411 cooking Methods 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052785 arsenic Inorganic materials 0.000 abstract description 8
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052787 antimony Inorganic materials 0.000 abstract description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005987 sulfurization reaction Methods 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000009853 pyrometallurgy Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a simulation training device for a crude tin refining kettle, which comprises a stove, a stove body, a grate, a smoke hood, a motor, a stirring shaft and blades, wherein the stove body is of an upper opening hollow structure and is downwards embedded into the stove, the grate is arranged in the stove at the bottom of the stove body and is internally provided with a heating simulation component, the smoke hood is arranged on an upper opening of the stove body and is communicated with a smoke exhaust pipe, the motor is arranged at the upper end of the stove on one side of the smoke hood, one end of the stirring shaft is connected with a rotating shaft of the motor, the other end of the stirring shaft penetrates through the smoke hood and extends into the stove body, the blades are coaxially fixed at the lower end of the stirring shaft, and liquid simulation raw materials simulating crude tin liquid and solid simulation raw materials simulating scum are also placed in the stove body. The utility model can enable students to visually observe the operation processes of copper removal by sulfurization, iron and arsenic removal by a liquation-condensation method and arsenic and antimony removal by aluminum, and can carry out relevant practical training operation, thereby expanding the visual field of the students and enhancing the practical training teaching effect.
Description
Technical Field
The utility model relates to the technical field of teaching aids, in particular to a crude tin refining pot simulation training device which is small in size, stable and reliable in operation, strong in reproducibility and capable of simulating and simulating production of enterprises.
Background
The refining of crude tin includes two methods of pyrometallurgy and hydrometallurgy (electrolysis). At present, pyrometallurgy has the advantage of low accumulated tin because of high production capacity and no long-term stagnation of metal in the production process, and is the mainstream crude tin refining method in the world at present. The fire refining of crude tin is a main core process technology in the production process of metallic tin, and the technology is mature and has wide application. However, the equipment for fire refining the crude tin is large and complex, the danger level is high, most of new staff and students in the industry cannot operate in person, and a long process and long training operation training are needed for familiarity and grasp.
Therefore, the establishment of a course of 'crude tin refining pot simulation training' can enable students to master the process technologies of crude tin sulfurization copper removal, liquation condensation method iron and arsenic removal, aluminum adding arsenic and antimony removal, know the process principle, process flow, technical operation, process condition control and work tasks in the refining processes of crude tin sulfurization copper removal, liquation condensation method iron and arsenic removal, aluminum adding arsenic and antimony removal and the like, and complete the specified simulation training task. However, the study of the course of 'simulated practical training of the crude tin refining kettle' is usually pure theoretical training and physical display of a single subsystem, the overall framework display of the crude tin refining kettle cannot be realized, the operation effect of what you see is what you get cannot be realized, and a lot of inconvenience is brought to the study of professional knowledge, the visual experience of equipment and the training of the practical ability of students.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a crude tin refining pot simulation training device which is small in size, stable and reliable in operation, strong in reproducibility and capable of simulating production of enterprises.
The research device of the utility model is realized by the following steps: including kitchen range, furnace body, grate, petticoat pipe, motor, (mixing) shaft, blade, the furnace body is upper shed hollow structure and embedding kitchen range downwards, the grate sets up in the kitchen range of furnace body bottom and is equipped with the heating simulation subassembly in, the petticoat pipe cover is established on the upper portion opening of furnace body and top or lateral part and is managed the intercommunication of discharging fume, the motor sets up in the kitchen range upper end of petticoat pipe one side, (mixing) shaft one end is connected with the pivot of motor and the other end passes the petticoat pipe and incline downward to extending in the furnace body, the coaxial fixed lower extreme that sets up in the (mixing) shaft of blade, the solid-state emulation raw materials of the liquid emulation raw materials of simulation thick tin liquid and simulation dross are still placed in the furnace body.
The utility model has the beneficial effects that:
1. the utility model can enable students to visually observe the whole process of adding sulfur to remove copper, removing iron and arsenic by a liquation-condensation method, adding aluminum to remove arsenic and antimony and the like, and can carry out relevant practical training operation, thereby expanding the visual field of the students and enhancing the practical training teaching effect.
2. The utility model simulates the crude tin refining pot through a principle simplified structure, namely realizes the structure and operation simulation of the crude tin refining pot, has smaller volume, and ensures that the operation process is safe, reliable and stable and has strong reproducibility by adopting a safe heating simulation component, a liquid simulation raw material for simulating tin liquid and a solid simulation raw material for simulating floating impurities.
3. The utility model can completely embody the typical impurity removal process operation of the crude tin refining kettle and meet the practice and practical training operation requirements of professional students in smelting and process control; and the device can be used for investigating the work tasks of control, raw material feeding, the revolution of the stirring shaft, measurement and recording of production data and the like in the impurity removing process of the crude tin refining pot, can be used for carrying out installation, maintenance and structural design practical training of typical smelting equipment, and can be used for carrying out plane and three-dimensional arrangement and related drawing practical training of the typical smelting equipment.
In conclusion, the utility model has the characteristics of small volume, stable and reliable operation, strong reproducibility and capability of simulating the production of enterprises.
Drawings
FIG. 1 is a schematic view of the present invention; (transparent furnace body)
FIG. 2 is a second schematic structural diagram of the present invention; (transparent window)
FIG. 3 is a cross-sectional view of FIG. 2;
FIG. 4 is a partial enlarged view of FIG. 2;
in the figure: 1-stove, 2-stove body, 2A-transparent window, 3-grate, 4-smoke hood, 5-motor, 6-stirring shaft, 7-blade, 8-baffle, 8A-fixed baffle, 8B-movable baffle, 9-support, 9A-fixed support, 9B-movable support, 10-simulated flame, 11-liquid simulated raw material and 12-solid simulated raw material.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit the utility model.
As shown in fig. 1 to 4, the utility model comprises a stove 1, a stove body 2, a grate 3, a smoke hood 4, a motor 5, a stirring shaft 6 and blades 7, wherein the stove body 2 is of an upper opening hollow structure and is downwards embedded into the stove 1, the grate 3 is arranged in the stove 1 at the bottom of the stove body 2 and is internally provided with a heating simulation component, the smoke hood 4 is covered on an upper opening of the stove body 2, the top or the side part of the smoke hood is communicated with a smoke exhaust pipe, the motor 5 is arranged at the upper end of the stove 1 at one side of the smoke hood 4, one end of the stirring shaft 6 is connected with a rotating shaft of the motor 5, the other end of the stirring shaft passes through the smoke hood 4 and inclines downwards to extend inwards the stove body 2, the blades 7 are coaxially and fixedly arranged at the lower end of the stirring shaft 6, and liquid simulation raw materials simulating crude tin liquid and solid simulation raw materials simulating scum are also placed in the stove body 2.
The stove comprises a stove body 2, a side wall extending out of the stove 1 and a grate 3 correspondingly arranged on at least one side of the stove body 2 are exposed out of the stove 1, the stove body 2 is a transparent tank body, or a transparent window 2A is arranged on one side extending out of the stove 1 and being a non-transparent tank body.
The heating simulation component in the grate 3 is a simulated flame 10.
A baffle 8 which can be opened and closed is arranged between the upper opening of the furnace body 2 and the smoke hood 4, and the stirring shaft 6 penetrates through the baffle 8 and extends into the furnace body 2.
The bottom of petticoat pipe 4 is provided with the pull groove, baffle 8 includes fixed stop 8A, moving baffle 8B, fixed stop 8A covers on the upper shed of furnace body 2 and the middle part is provided with the opening, moving baffle 8B covers on fixed stop 8A's opening and one end extends to the pull groove of petticoat pipe 4 outward.
As shown in fig. 3, the drawing groove of the smoke hood 4 is arranged at the bottom of the opposite side of the motor 5, the opening bottom end of the fixed baffle 8A is provided with an arc section i larger than the diameter of the stirring shaft 6, the opening extends towards one side of the drawing groove, and the front end of the movable baffle 8B is provided with an arc section ii larger than the diameter of the stirring shaft 6.
The upper end of the cooking range 1 is fixedly provided with a support 9, and the motor 5 is obliquely arranged on the upper part of the support 9.
As shown in fig. 4, the support 9 includes a fixed support 9A and a movable support 9B, the fixed support 9A is in an "ii" shape, the bottom of the fixed support 9A is fixedly disposed on the upper end surface of the cooking range 1, the upper end of the fixed support is provided with an inclined surface inclined toward the furnace body 2, and the inclined surface of the fixed support 9A is provided with a waist hole parallel to the stirring shaft 6; the movable support 9B is in an L-shaped structure, the bottom edge of the movable support is connected with the waist hole of the fixed support 9A through a fixing bolt, and the motor 5 is fixedly arranged on the side wall of the movable support 9B.
The liquid simulation raw material is liquid water, and the solid simulation raw material is wax beads with the diameter of 8-12 mm.
The axis included angle of the stirring shaft 6 and the furnace body 2 is 45-60 degrees.
The grate 3 and the stove 1 are both made of reinforced concrete.
And an outlet with the diameter larger than that of the solid simulation raw material is arranged on the lower side wall or the bottom end of the furnace body 2.
The working principle and the working method of the utility model are as follows:
as shown in fig. 2, 3 and 4, the main body of the furnace body 2 (i.e. tin pan) is made of stainless steel plate, the bottom diameter is 687mm, the top diameter is 1300mm, and the upper opening is embedded in the furnace 1, wherein a transparent window 2A extending up and down is arranged on the side wall exposed out of the side surface of the furnace 1 (students can visually watch the impurity removing operation of the refining pan); the simulated flame 10 is arranged in the grate 3 at the lower side of the transparent window 2A, the openable baffle 8 is arranged on the upper opening of the furnace body 2, the smoke hood 4 covers the baffle and is communicated with the smoke exhaust pipe, and the upper end of the upper opening of the furnace body 2 and the upper end surface of the stove 1 are on the same horizontal plane. The furnace body 2 is internally provided with liquid water 11 to replace crude tin metal liquid, and is internally provided with wax beads 12 with the diameter of about 10mm to replace scum in the crude tin, and the wax beads float on the water surface. The length of the stirring shaft 6 is 880mm, one end of the stirring shaft is connected with the rotating shaft of the motor 5, and the other end of the stirring shaft penetrates through the smoke hood 4 and the baffle 8 and extends into the simulated crude tin metal liquid in the furnace body 2 to drive the blades 7 at the lower end of the stirring shaft to stir for 360 degrees; the motor 5 can make the blade 7 move along the inclined plane of the support 9 along with the motor 5 through a fixing bolt with the bottom penetrating through a waist hole on the support 9 and stir.
During practical training operation, when feeding or smoke discharging is simulated, the movable baffle 8B extending out of the smoke hood 4 can be extracted outwards, so that the opening on the fixed baffle 8A is opened, and the opening on the fixed baffle 8A can be closed by the movable baffle 8B pushed inwards; the fixing bolt of the movable support 9B penetrating through the waist hole of the fixed support 9A is adjusted to be properly loosened and loosened, and the stirring position of the blade 7 in the furnace body 2 can be changed by pushing and pulling the motor 5, so that the production process of a crude tin refining pot can be simulated, and corresponding practical training operation can be carried out.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention will be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a real device of instructing of crude tin refining pot emulation, its characterized in that includes kitchen range (1), furnace body (2), grate (3), petticoat pipe (4), motor (5), (mixing) shaft (6), blade (7), furnace body (2) are upper shed hollow structure and downward embedding kitchen range (1), grate (3) set up in kitchen range (1) of furnace body (2) bottom and be equipped with the heating simulation subassembly in and, petticoat pipe (4) cover is established on the upper portion opening of furnace body (2) and top or lateral part and the pipe intercommunication of discharging fume, motor (5) set up in kitchen range (1) upper end of petticoat pipe (4) one side, (mixing) shaft (6) one end is connected with the pivot of motor (5) and the other end passes petticoat pipe (4) and inclines decurrent and extends in furnace body (2), blade (7) coaxial fixed sets up in the lower extreme of (mixing) shaft (6), and a liquid simulation raw material for simulating crude tin liquid and a solid simulation raw material for simulating scum are also placed in the furnace body (2).
2. The practical training device for simulation of the crude tin refining pot according to claim 1 is characterized in that at least one side of the furnace body (2) extends out of the side wall of the cooking range (1), the corresponding side grate (3) is exposed outside the cooking range (1), and the furnace body (2) is a transparent tank body or a non-transparent tank body and a transparent window (2A) is arranged on one side extending out of the cooking range (1).
3. The simulated practical training device of the crude tin refining kettle according to claim 2, wherein the heating simulation component in the furnace grate (3) is a simulated flame.
4. The practical training device for the simulation of the crude tin refining kettle according to claim 2 is characterized in that a baffle (8) which can be opened and closed is arranged between the upper opening of the furnace body (2) and the smoke hood (4), and the stirring shaft (6) penetrates through the baffle (8) and extends into the furnace body (2).
5. The practical training device for simulation of the crude tin refining kettle according to claim 4, characterized in that a drawing groove is formed in the bottom of the smoke hood (4), the baffle (8) comprises a fixed baffle (8A) and a movable baffle (8B), the fixed baffle (8A) covers the upper opening of the furnace body (2), an opening is formed in the middle of the fixed baffle (8A), the movable baffle (8B) covers the opening of the fixed baffle (8A), and one end of the movable baffle extends out of the drawing groove of the smoke hood (4).
6. The practical training device for crude tin refining pot simulation according to claim 5 is characterized in that a drawing groove of the smoke hood (4) is formed in the bottom of the opposite side of the motor (5), an arc-shaped section I larger than the diameter of the stirring shaft (6) is arranged at the bottom end of an opening of the fixed baffle (8A), the opening extends towards one side of the drawing groove, and an arc-shaped section II larger than the diameter of the stirring shaft (6) is arranged at the front end of the movable baffle (8B).
7. The simulated practical training device of the crude tin refining kettle according to any one of claims 1 to 6 is characterized in that a support (9) is fixedly arranged at the upper end of the stove (1), and the motor (5) is obliquely arranged at the upper part of the support (9).
8. The practical training device for the simulation of the crude tin refining pot according to claim 7 is characterized in that the support (9) comprises a fixed support (9A) and a movable support (9B), the fixed support (9A) is in an n-shaped structure, the bottom of the fixed support (9A) is fixedly arranged on the upper end surface of the stove (1), the upper end of the fixed support is provided with an inclined surface inclined towards the furnace body (2), and the inclined surface of the fixed support (9A) is provided with a waist hole parallel to the stirring shaft (6); the movable support (9B) is of an L-shaped structure, the bottom edge of the movable support is connected with the waist hole of the fixed support (9A) through a fixing bolt, and the motor (5) is fixedly arranged on the side wall of the movable support (9B).
9. The practical training simulation device for the crude tin refining kettle according to claim 7, wherein the liquid simulation raw material is liquid water, and the solid simulation raw material is wax beads with the diameter of 8-12 mm.
10. The practical training device for simulation of the crude tin refining kettle according to claim 7 is characterized in that an included angle between the stirring shaft (6) and the axis of the furnace body (2) is 45-60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220054618.6U CN217034988U (en) | 2022-01-11 | 2022-01-11 | Simulation training device for crude tin refining pot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220054618.6U CN217034988U (en) | 2022-01-11 | 2022-01-11 | Simulation training device for crude tin refining pot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217034988U true CN217034988U (en) | 2022-07-22 |
Family
ID=82445422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220054618.6U Expired - Fee Related CN217034988U (en) | 2022-01-11 | 2022-01-11 | Simulation training device for crude tin refining pot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217034988U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117568620A (en) * | 2023-12-01 | 2024-02-20 | 昆明理工大学 | Crude tin double-pot sulfur adding and impurity removing reactor |
-
2022
- 2022-01-11 CN CN202220054618.6U patent/CN217034988U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117568620A (en) * | 2023-12-01 | 2024-02-20 | 昆明理工大学 | Crude tin double-pot sulfur adding and impurity removing reactor |
| CN117568620B (en) * | 2023-12-01 | 2024-04-30 | 昆明理工大学 | Crude tin double-pot sulfur adding and impurity removing reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217034988U (en) | Simulation training device for crude tin refining pot | |
| CN203999760U (en) | Lead bullion decopper(ing) pot environmental protection device for dragging dregs | |
| CN202786382U (en) | System for refining tellurium-rich crude bismuth | |
| CN204738006U (en) | Aluminium sediment processor | |
| CN208398630U (en) | aluminium smelting furnace | |
| CN202229616U (en) | Slag removal device for magnesium smelting reduction pot | |
| CN112024868A (en) | Automatic slag dragging device and method for tin refining pot in tin refining process | |
| CN205368473U (en) | A zinc pot dross removal mechanism for galvanizing line | |
| CN210356129U (en) | Oil-water separation operation panel | |
| CN203037083U (en) | Screw driving oscillating type lead smelting and slag removing device | |
| CN114774721B (en) | Copper alloy smelting automation system | |
| CN207600187U (en) | A kind of dual cavity crucible for magnesium recycling of giving up | |
| CN110468288A (en) | A kind of device for removing slag for aluminum anodizing | |
| CN203069549U (en) | Electrolytic bath for large sample electrolysis | |
| CN207600180U (en) | A kind of magnesium alloy melting and heat preservation stove with recycling | |
| CN103014348A (en) | Device and process for continuously processing grids separated from waste lead-acid batteries | |
| CN212082034U (en) | Slag discharging device for secondary lead smelting | |
| CN114440631A (en) | Low-energy-consumption aluminum plate production method and smelting device thereof | |
| CN102978415B (en) | Oscillating type lead smelting and slag removing device | |
| CN209024617U (en) | A kind of coarse-lead alloy smelting apparatus | |
| CN203393209U (en) | Lead refining pan dust-collecting device | |
| CN203212615U (en) | Hot aluminum ash separating machine | |
| CN110849141A (en) | Smelting furnace for refining precious metals | |
| CN210736854U (en) | Improved generation aluminium sediment retrieves machine | |
| CN206289288U (en) | A kind of industrial lead bullion low-coumption refining equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220722 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |