CN209501742U - A kind of experiment porch handling different type sewage - Google Patents
A kind of experiment porch handling different type sewage Download PDFInfo
- Publication number
- CN209501742U CN209501742U CN201822021099.XU CN201822021099U CN209501742U CN 209501742 U CN209501742 U CN 209501742U CN 201822021099 U CN201822021099 U CN 201822021099U CN 209501742 U CN209501742 U CN 209501742U
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- China
- Prior art keywords
- pond
- workbench
- case
- different type
- alkalinity
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Abstract
The utility model discloses the experiment porch that one kind can handle different type sewage, including workbench, pond, alkalinity neutralizes case, reaction chamber, the pond is provided on the workbench, the pond is embedded in the workbench, the pond side is provided with tap, control keyboard is provided on rear side of the pond, the control keyboard is embedded in the workbench, the control keyboard side is provided with display screen, the display screen is embedded in the workbench, strainer is provided on the inside of the pond, the strainer is connected by a snap in the pond, the pond lower end is provided with deflector.Beneficial effect is: structurally reasonable, easy to operate, easy to use, equipment operation is simple, only test need to be poured into pond inside with waste water, the later period has equipment to automatically process, highly-safe, it avoids causing unexpected because staff topples over mistake using old equipment.
Description
Technical field
The utility model relates to sewage treatment field, the experiment that can handle different type sewage more particularly to one kind is flat
Platform.
Background technique
Laboratory can generate the waste water containing various substances during the experiment, these waste components are more complicated, if
Direct emission is likely to cause environmental pollution, and general laboratory waste water is all centralized collection, then transports and is suitble to again
Treatment plant's processing, but waste water in this way can be accumulated, and form more collarium borders, pollute environment, conventional sewage treatment is will be in water
With, be discharged after then filtering, but need classification processing like that, and many times experiment porch discharge outlet be together,
If waste water accidentally to have been poured into the processing pipeline of mistake, it can also cause accident, safety is not high.
Utility model content
The purpose of this utility model be that solve the above-mentioned problems and providing a kind of can handle different type sewage
Experiment porch, the utility model improve the practicability of sewage treatment experiment porch.
The utility model achieves the above object through the following technical schemes:
A kind of experiment porch handling different type sewage, including workbench, pond, alkalinity neutralization case, reaction chamber, institute
It states and is provided with the pond on workbench, the pond is embedded in the workbench, and the pond side is provided with tap, institute
It states and is provided with control keyboard on rear side of pond, the control keyboard is embedded in the workbench, and the control keyboard side is provided with
Display screen, the display screen are embedded in the workbench, are provided with strainer on the inside of the pond, the strainer is connected by a snap
In the pond, the pond lower end is provided with deflector, and the deflector is connected by welding with the pond, the water conservancy diversion
Plate lower end is provided with central tube, and the central tube is threadingly attached to the deflector, and the central tube is internally provided with water
Matter sensor, the water quality sensor model SE-564-ORP, the water quality sensor are connected by screw in the center
Pipe, there are three isocons for the central tube lower end setting, and the isocon is by flanged joint in the central tube, the shunting
Solenoid valve is provided with inside pipe, the solenoid valve is threadingly attached to the isocon, and the isocon side is provided with
The alkalinity neutralizes case, and the alkalinity neutralizes case and is bolted to the workbench, and the isocon other side is provided with
Acidity neutralizes case, and the acid case that neutralizes is bolted to the workbench, and the acid case upper end that neutralizes is provided with alkali
Property in and fluid reservoir, the alkalinity neutralize case upper end be provided with it is acid neutralize fluid reservoir, it is described acid to neutralize case and the alkalinity
It neutralizes case lower end and is provided with stirring motor, acid neutralize is provided with paddle inside case and the alkalinity neutralization case
Piece, the alkalinity neutralizes between fluid reservoir and the acid neutralization case, the acidity neutralizes fluid reservoir and the alkalinity neutralizes case
Between be provided with flow valve, the alkalinity neutralizes fluid reservoir, acid neutralize is provided with gas collecting tube on rear side of fluid reservoir, institute
It states and is provided with air pump on the inside of gas collecting tube, the air pump upper end is provided with exhaust pipe, and the exhaust pipe is internally provided with active carbon filtration
Box, the activated-carbon filter box lower end are provided with lime stone filter box, are provided with transfer tube, the transfer tube on front side of the stirring motor
Side is provided with the first water pump, and first water pump rear end is provided with the reaction chamber, and there are four the reaction chamber upper end settings
Treatment fluid liquid reserve tank is provided with the flow valve, the reaction chamber one between the treatment fluid liquid reserve tank and the reaction chamber
Side is provided with water-supply-pipe, and the water-supply-pipe upper end is provided with the second water pump, and second water pump upper end is provided with monitor box, described
Monitor box is internally provided with the water quality sensor, and the monitor box upper end is provided with tee tube, setting inside the tee tube
There are two the solenoid valve, the tee tube side is provided with purifying box, and the purifying box side is provided with outlet pipe.
It is preferred: controller, the controller model FX3G, institute are provided between the display screen and the workbench
Controller is stated to be connected by screw in the workbench.
So set, the controller plays control and processing, it is connected by screw to and ensure that bonding strength.
Preferred: the outlet pipe is threadingly attached to the purifying box.
So set, the outlet pipe plays drainage, it is connected through a screw thread easy to disassemble.
Preferred: the tee tube is by flanged joint in the purifying box, the reaction chamber, the monitor box.
So set, the tee tube plays connection function, installation is facilitated by flanged joint, connection sealing is good.
Preferred: the solenoid valve is threadingly attached to the tee tube.
So set, the solenoid valve plays on-off action, it is connected through a screw thread and ensure that leakproofness.
Preferred: second water pump is by flanged joint in the monitor box, the water-supply-pipe.
So set, second water pump plays energy supply, installation is facilitated by flange.
Preferred: the flow valve is threadingly attached to the reaction chamber.
So set, the flow valve, which rises, is monitored and controlled on-off action, it is connected through a screw thread and ensure that leakproofness.
Preferred: the treatment fluid liquid reserve tank is bolted to the reaction chamber.
So set, the treatment fluid liquid reserve tank plays storage treatment fluid, it is bolted and ensure that bonding strength.
Preferred: first water pump is bolted to the reaction chamber.
So set, first water pump plays energy supply, it is bolted and ensure that bonding strength.
It is preferred: the controller by conducting wire be connected to the display screen, the control keyboard, the stirring motor,
First water pump, second water pump, the air pump, the solenoid valve, the water quality sensor, the flow valve.
So set, the controller is connected to each electric elements by conducting wire, the timeliness of information processing ensure that.
Compared with prior art, the beneficial effects of the utility model are as follows:
1, structurally reasonable, it is easy to operate, it is easy to use；
2, equipment operation is simple, only need to pour test into pond inside with waste water, the later period has equipment to automatically process；
3, highly-safe, it avoids causing unexpected because staff topples over mistake using old equipment.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the experiment porch that one kind described in the utility model can handle different type sewage；
Fig. 2 is the first internal structure signal for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Fig. 3 is the second internal structure signal for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Fig. 4 is the main view internal structure signal for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Fig. 5 is the center tube structure signal for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Fig. 6 is that the acid of the experiment porch that one kind described in the utility model can handle different type sewage neutralizes case internal junction
Structure schematic diagram；
Fig. 7 is the treatment fluid liquid storage box structure for the experiment porch that one kind described in the utility model can handle different type sewage
Schematic diagram；
Fig. 8 is that the exhaust pipe internal structure for the experiment porch that one kind described in the utility model can handle different type sewage is shown
It is intended to；
Fig. 9 is the controller architecture signal for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Figure 10 is the monitor box structural representation for the experiment porch that one kind described in the utility model can handle different type sewage
Figure；
Figure 11 is the circuit structure flow chart element for the experiment porch that one kind described in the utility model can handle different type sewage
Figure.
The reference numerals are as follows:
1, workbench；2, pond；3, strainer；4, tap；5, display screen；6, control keyboard；7, outlet pipe；8, it is vented
Pipe；9, acid to neutralize case；10, alkalinity neutralizes case；11, stirring motor；12, central tube；13, isocon；14, alkalinity neutralizes liquid storage
Tank；15, acid to neutralize fluid reservoir；16, transfer tube；17, the first water pump；18, reaction chamber；19, treatment fluid liquid reserve tank；20, threeway
Pipe；21, monitor box；22, the second water pump；23, purifying box；24, air pump；25, gas collecting tube；26, activated-carbon filter box；27, lime stone
Filter box；28, controller；29, deflector；30, solenoid valve；31, water-supply-pipe；32, water quality sensor；33, stirring blade；34, it flows
Measure valve.
Specific embodiment
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model is described in further detail with reference to the accompanying drawing:
Embodiment 1
As shown in Figure 1-Figure 11, a kind of experiment porch handling different type sewage, including workbench 1, pond 2, alkali
Property in and case 10, reaction chamber 18, be provided with pond 2 on workbench 1, workbench 1 plays carrying, and collecting action is played in pond 2, water
Pond 2 is embedded in workbench 1, and 2 side of pond is provided with tap 4, and tap 4 plays water supply, control is provided on rear side of pond 2
Keyboard 6, control keyboard 6 play control action, and control keyboard 6 is embedded in workbench 1, and 6 side of control keyboard is provided with display screen 5,
Display screen 5 is embedded in workbench 1, and strainer 3 is provided on the inside of pond 2, and strainer 3 plays filtering bulky grain sundries, and strainer 3 passes through
Snap connection in pond 2,2 lower end of pond is provided with deflector 29, and deflector 29 plays drainage, deflector 29 by welding and
Pond 2 connects, and 29 lower end of deflector is provided with central tube 12, and central tube 12 plays detection box collecting action, and central tube 12 passes through spiral shell
Line is connected to deflector 29, and central tube 12 is internally provided with water quality sensor 32, and water quality sensor 32 plays detection, and water quality passes
Sensor 32 is connected by screw in central tube 12, and there are three isocon 13, isocon 13 plays shunting and makees the setting of 12 lower end of central tube
With isocon 13 is provided with solenoid valve 30 by flanged joint inside central tube 12, isocon 13, and solenoid valve 30 plays on-off
Effect, solenoid valve 30 are threadingly attached to isocon 13, and 13 side of isocon is provided with alkalinity and neutralizes case 10, and alkalinity neutralizes case
10 play processing alkaline waste water, and alkalinity neutralizes case 10 and is bolted to workbench 1, and 13 other side of isocon is provided with acid
Property in and case 9, acidity neutralize case 9 and play treatment of acidic wastewater, acidity neutralizes case 9 and is bolted to workbench 1, acidity
It neutralizes 9 upper end of case and is provided with alkaline neutralization fluid reservoir 14, alkalinity neutralizes 10 upper end of case and is provided with acid neutralization fluid reservoir 15, acidity
It neutralizes case 9 and alkalinity neutralizes 10 lower end of case and is provided with stirring motor 11, acidity neutralizes case 9 and alkalinity is neutralized and is all provided with inside case 10
It is equipped with stirring blade 33, alkalinity neutralizes between fluid reservoir 14 and acid neutralization case 9, acidity neutralizes fluid reservoir 15 and alkalinity neutralizes case
Flow valve 34 is provided between 10, alkalinity neutralizes fluid reservoir 14, acid neutralize is provided with gas collecting tube 25 on rear side of fluid reservoir 15,
Air pump 24 is provided on the inside of gas collecting tube 25,24 upper end of air pump is provided with exhaust pipe 8, and exhaust pipe 8 is internally provided with activated-carbon filter box
26,26 lower end of activated-carbon filter box is provided with lime stone filter box 27, is provided with transfer tube 16, transfer tube 16 1 on front side of stirring motor 11
Side is provided with the first water pump 17, and 17 rear end of the first water pump is provided with reaction chamber 18, and there are four treatment fluids for the setting of 18 upper end of reaction chamber
Liquid reserve tank 19, is provided with flow valve 34 between treatment fluid liquid reserve tank 19 and reaction chamber 18,18 side of reaction chamber is provided with water delivery
Pipe 31,31 upper end of water-supply-pipe are provided with the second water pump 22, and 22 upper end of the second water pump is provided with monitor box 21, sets inside monitor box 21
It is equipped with water quality sensor 32,21 upper end of monitor box is provided with tee tube 20, and tee tube 20 is internally provided with two solenoid valves 30, and three
20 side of siphunculus is provided with purifying box 23, and 23 side of purifying box is provided with outlet pipe 7.
Embodiment 2
The present embodiment the difference from embodiment 1 is that:
Controller 28 is provided between display screen 5 and workbench 1, controller 28 is connected by screw in workbench 1, control
Device 28 plays control and processing, is connected by screw to and ensure that bonding strength.
As the preferred implementation of the present embodiment, the outlet pipe 7 is threadingly attached to the purifying box 23.It is described
Tee tube 20 is by flanged joint in the purifying box 23, the reaction chamber 18, the monitor box (21).The solenoid valve 30 is logical
It crosses and is threadedly connected to the tee tube 20.Second water pump 22 is by flanged joint in the monitor box 21, the water-supply-pipe
31.The flow valve 34 is threadingly attached to the reaction chamber 18.The treatment fluid liquid reserve tank 19 is bolted to institute
State reaction chamber 18.First water pump 17 is bolted to the reaction chamber 18.The controller 28 is connected by conducting wire
In the display screen 5, control keyboard 6, the stirring motor 11, first water pump 17, second water pump 22, described
Air pump 24, the solenoid valve 30, the water quality sensor 32, the flow valve 34.
Working principle: staff controls 28 starting device of controller using control keyboard 6, and waste water is poured directly into water
In pond 2, the strainer 3 on pond 2 filters big particle, and liquid directly passes through deflector 29 and flows into inside central tube 12, central tube
Water quality sensor 32 inside 12 monitors the characteristic of this waste water, is sent to controller 28, such as this waste water is acidity, control
Device 28 controls the acid solenoid valve 30 for neutralizing 9 side of case and opens, and waste water is entered by the acid isocon 13 for neutralizing 9 side of case
Acidity neutralizes inside case 9, and controller 28 controls the opening of flow valve 34 that alkalinity neutralizes 14 lower end of fluid reservoir, opens stirring motor
11, make acid waste water and basic solvent neutralization reaction, after reaction, waste water is pumped into inside reaction chamber 18 by the starting of the first water pump 17,
The opening of flow valve 34 of four 19 lower ends for the treatment of fluid liquid reserve tank pours into appropriate treatment fluid, handles waste water, the starting of the second water pump 22 will
Partially treated, and water is pumped into inside monitor box 21, and the water quality sensor 32 inside monitor box 21 detects whether that processing is qualified, when
When unqualified, the solenoid valve 30 of 23 side of purifying box is closed, and the solenoid valve 30 of 18 side of reaction chamber is opened, and waste water continues to flow back to anti-
Case 18 is answered to handle, after qualification, the solenoid valve 30 of 23 side of purifying box is opened, and the solenoid valve 30 of 18 side of reaction chamber is closed, place
Water is managed after the filter element filtering inside purifying box 23, is discharged by outlet pipe 7.
As the preferred implementation of the present embodiment, it is equipped with flange at the outlet pipe 7, passes through flange and membrane biological reaction
The water inlet of device connects, the water that will be neutralized by acid/base, further desalting processing；The film packet that the membrane bioreactor uses
Include but be not limited to reaction film, amberplex, permeable membrane.
The basic principles and main features and advantage of the utility model have been shown and described above.The technical staff of the industry
It should be appreciated that the present utility model is not limited to the above embodiments, the above embodiments and description only describe this
The principle of utility model, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various change
And improvement, these various changes and improvements fall within the scope of the claimed invention.
Claims (10)
1. the experiment porch that one kind can handle different type sewage, it is characterised in that: including workbench (1), pond (2), alkalinity
Case (10), reaction chamber (18) are neutralized, are provided with the pond (2) on the workbench (1), the pond (2) is embedded in described
Workbench (1), pond (2) side are provided with tap (4), are provided with control keyboard (6), institute on rear side of the pond (2)
It states control keyboard (6) to be embedded in the workbench (1), control keyboard (6) side is provided with display screen (5), the display
Screen (5) is embedded in the workbench (1), is provided with strainer (3) on the inside of the pond (2), the strainer (3) is connected by a snap
In the pond (2), pond (2) lower end is provided with deflector (29), and the deflector (29) passes through welding and the water
Pond (2) connection, deflector (29) lower end are provided with central tube (12), and the central tube (12) is threadingly attached to described
Deflector (29), the central tube (12) are internally provided with water quality sensor (32), and the water quality sensor (32) passes through screw
It is connected to the central tube (12), there are three isocon (13), the isocon (13) is logical for central tube (12) the lower end setting
It crosses flanged joint and is provided with solenoid valve (30), the solenoid valve inside the central tube (12), the isocon (13)
(30) it being threadingly attached to the isocon (13), isocon (13) side is provided with the alkalinity and neutralizes case (10),
The alkalinity neutralizes case (10) and is bolted to the workbench (1), and isocon (13) other side is provided with acidity
It neutralizes case (9), acid neutralize case (9) are bolted to the workbench (1), described acid neutralization case (9) upper end
It is provided with alkalinity and neutralizes fluid reservoir (14), alkalinity neutralization case (10) upper end is provided with acidity and neutralizes fluid reservoir (15), described
Acidity neutralizes case (9) and the alkalinity neutralizes case (10) lower end and is provided with stirring motor (11), acid neutralization case (9) and
The alkalinity neutralizes to be provided with stirring blade (33) inside case (10), and the alkalinity neutralizes in fluid reservoir (14) and the acidity
Flow valve (34) are provided between case (9), between acid neutralization fluid reservoir (15) and alkalinity neutralization case (10),
The alkalinity neutralizes fluid reservoir (14), acid neutralize is provided with gas collecting tube (25), the gas collection on rear side of fluid reservoir (15)
It is provided with air pump (24) on the inside of pipe (25), air pump (24) upper end is provided with exhaust pipe (8), is set inside the exhaust pipe (8)
It is equipped with activated-carbon filter box (26), activated-carbon filter box (26) lower end is provided with lime stone filter box (27), the stirring motor
(11) front side is provided with transfer tube (16), and transfer tube (16) side is provided with the first water pump (17), first water pump
(17) rear end is provided with the reaction chamber (18), and there are four treatment fluid liquid reserve tank (19), institutes for reaction chamber (18) the upper end setting
It states and is provided between treatment fluid liquid reserve tank (19) and the reaction chamber (18) flow valve (34), the reaction chamber (18) one
Side is provided with water-supply-pipe (31), and water-supply-pipe (31) upper end is provided with the second water pump (22), the second water pump (22) upper end
It is provided with monitor box (21), the monitor box (21) is internally provided with the water quality sensor (32), on the monitor box (21)
End is provided with tee tube (20), and the tee tube (20) is internally provided with two solenoid valves (30), the tee tube (20)
Side is provided with purifying box (23), and purifying box (23) side is provided with outlet pipe (7).
2. the experiment porch according to claim 1 for handling different type sewage, it is characterised in that: the display screen
(5) it is provided between the workbench (1) controller (28), the controller (28) is connected by screw in the workbench
(1)。
3. the experiment porch according to claim 2 for handling different type sewage, it is characterised in that: the outlet pipe
(7) purifying box (23) are threadingly attached to.
4. the experiment porch according to claim 3 for handling different type sewage, it is characterised in that: the tee tube
(20) by flanged joint in the purifying box (23), the reaction chamber (18), the monitor box (21).
5. the experiment porch according to claim 4 for handling different type sewage, it is characterised in that: the solenoid valve
(30) tee tube (20) are threadingly attached to.
6. the experiment porch according to claim 5 for handling different type sewage, it is characterised in that: second water pump
(22) by flanged joint in the monitor box (21), the water-supply-pipe (31).
7. the experiment porch according to claim 6 for handling different type sewage, it is characterised in that: the flow valve
(34) reaction chamber (18) are threadingly attached to.
8. the experiment porch according to claim 7 for handling different type sewage, it is characterised in that: the treatment fluid storage
Liquid case (19) is bolted to the reaction chamber (18).
9. the experiment porch according to claim 8 for handling different type sewage, it is characterised in that: first water pump
(17) reaction chamber (18) are bolted to.
10. the experiment porch according to claim 9 for handling different type sewage, it is characterised in that: the controller
(28) display screen (5), the control keyboard (6), the stirring motor (11), first water pump are connected to by conducting wire
(17), second water pump (22), the air pump (24), the solenoid valve (30), the water quality sensor (32), the flow
Valve (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021099.XU CN209501742U (en) | 2018-12-03 | 2018-12-03 | A kind of experiment porch handling different type sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021099.XU CN209501742U (en) | 2018-12-03 | 2018-12-03 | A kind of experiment porch handling different type sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209501742U true CN209501742U (en) | 2019-10-18 |
Family
ID=68193562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822021099.XU Expired - Fee Related CN209501742U (en) | 2018-12-03 | 2018-12-03 | A kind of experiment porch handling different type sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209501742U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529970A (en) * | 2018-12-03 | 2019-03-29 | 北京理工大学珠海学院 | A kind of experiment porch handling different type sewage |
| CN113058675A (en) * | 2021-03-26 | 2021-07-02 | 安徽金石创一教育管理有限公司 | Multifunctional teaching experiment table |
-
2018
- 2018-12-03 CN CN201822021099.XU patent/CN209501742U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529970A (en) * | 2018-12-03 | 2019-03-29 | 北京理工大学珠海学院 | A kind of experiment porch handling different type sewage |
| CN113058675A (en) * | 2021-03-26 | 2021-07-02 | 安徽金石创一教育管理有限公司 | Multifunctional teaching experiment table |
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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: 20191018 Termination date: 20201203 |
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| CF01 | Termination of patent right due to non-payment of annual fee |