CN208494227U - Liquid selenium-rich nutrition chelated fertilizer production equipment - Google Patents
Liquid selenium-rich nutrition chelated fertilizer production equipment Download PDFInfo
- Publication number
- CN208494227U CN208494227U CN201821155836.9U CN201821155836U CN208494227U CN 208494227 U CN208494227 U CN 208494227U CN 201821155836 U CN201821155836 U CN 201821155836U CN 208494227 U CN208494227 U CN 208494227U
- Authority
- CN
- China
- Prior art keywords
- chelating
- cylinder
- mixing drum
- solenoid valve
- fertilizer production
- 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
- 239000003337 fertilizer Substances 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910052711 selenium Inorganic materials 0.000 title claims abstract description 22
- 239000011669 selenium Substances 0.000 title claims abstract description 22
- 230000035764 nutrition Effects 0.000 title abstract 2
- 235000016709 nutrition Nutrition 0.000 title abstract 2
- 238000002156 mixing Methods 0.000 claims abstract description 58
- 238000003756 stirring Methods 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000010412 perfusion Effects 0.000 claims description 25
- 230000000050 nutritive effect Effects 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 4
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 19
- 239000013522 chelant Substances 0.000 description 6
- 241000040710 Chela Species 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000009920 chelation Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001802 infusion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000036413 temperature sense Effects 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
Abstract
The utility model belongs to the field of fertilizer production devices, and particularly provides liquid selenium-rich nutrition chelating fertilizer production equipment, which comprises a mixing drum and a chelating drum with a mixing device, wherein the upper part of the mixing drum is provided with a feed inlet and a return port, and the lower part of the mixing drum is provided with a discharge port; the chelating cylinder comprises a cylinder body, a heating device and a shell, wherein the heating device and the shell are arranged on the outer side of the cylinder body, a liquid inlet is formed in the upper portion of the cylinder body, a liquid outlet is formed in the lower portion of the cylinder body, a stirring device and a temperature sensor are arranged in the cylinder body, the chelating cylinder further comprises a controller, and the stirring device, the heating device and the temperature sensor are all communicated with a controller circuit. The equipment can automatically realize quantitative feeding, separately stir and fully mix according to the characteristics of materials; the chelating temperature and time are controllable, and the stability of the quality of the finished chelating fertilizer is ensured.
Description
Technical field
The utility model belongs to fertilizer production device field, specifically provides a kind of liquid selenium-rich nutritive chelating fertilizer production
Equipment.
Background technique
Crops selenium-rich is the hot spot of agricultural research in recent years, and liquid selenium-rich nutritive chelating fertilizer is also promoted and applied,
And chelating fertilizer is different into temperature needed for the different stages and chelating time during processed, has very to the quality of product
Big influence, liquid selenium-rich nutritive chelating fertilizer unstable quality on the market, is easy to appear uneven components, layering, chela at present
Close the problems such as insufficient, chelating is time-consuming long.Its reason essentially consist in chelating fertilizer production equipment to the stirring of raw material not enough uniformly, do not have
Have and the time of its temperature, mixing speed and required temperature and stirring is automatically adjusted and controlled in chelating different phase.
Utility model content
The purpose of the utility model is to overcome drawbacks described above, provide a kind of liquid selenium-rich nutritive chelating fertilizer production equipment, can
Automatic adjustment and control chelating overall process, keep the chelating fertilizer quality produced more stable, more evenly, and chelate time-consuming short.
The technical solution of the utility model includes: a kind of liquid selenium-rich nutritive chelating fertilizer production equipment, including with agitating device
Mixing drum and chelating cylinder, the mixing drum top is equipped with feed inlet and refluxing opening, lower part are equipped with discharge port, and the discharge port passes through
Return pipe is connected with refluxing opening, and the return pipe also passes through perfusion tube and is connected with chelating cylinder, on the return pipe and perfusion tube
Equipped with solenoid valve, drawing liquid pump is additionally provided on the return pipe；The chelating cylinder includes cylinder, the heating device on the outside of cylinder
And shell, the cylinder top is equipped with inlet, lower part is equipped with liquid outlet, it is equipped with agitating device and temperature sensor in cylinder,
It further include controller, the agitating device, heating device and temperature sensor are connected to controller line.The controller packet
Include temperature sense module, heating control module, mixing control module and display module.Temperature sense module is for receiving temperature biography
The temperature that sensor is sent, and feedback signal control the opening and closing of heating device.Mixing control module can control agitating device
Revolving speed and start and stop, to control the mixing speed and mixing time of agitating device.Display module for show and be arranged temperature, when
Between equal relevant parameters.
In use, starting the agitating device of mixing drum in material transmission to mixing drum, by material stirring, stirring is certain
After time, starts drawing liquid pump, the material of mixing drum bottom is extracted into the top of mixing drum along return pipe, material is sufficiently stirred
It is even.After material stirs, the solenoid valve on closing volume pipe top, and the solenoid valve on perfusion tube is opened, make to stir
The material transferring mixed in cylinder further mixes, chela to cylinder is chelated under the action of chelating the agitating device and heating device of cylinder
It closes.During chelating, when the temperature that temperature sensor detects reaches setting upper limit value, controller adjusts heating device, makes
Heater stop heating.When the temperature that temperature sensor detects reaches preset lower limit, controller adjusts heating device
Control switch, start heating device.Since selenium-rich nutritive chelating fertilizer need to generally chelate more than ten days, monitored by temperature sensor
The intracorporal temperature of tank, and control by controller the opening and closing of heating device, preferably the control intracorporal temperature of tank, it is ensured that chelating
The stability of environment guarantees the stability of chelating fertilizer quality.Meanwhile controller can automatically adjust agitating device mixing speed and
Mixing time meets the stirring demand of different chelation stages, makes stable product quality, not stratified, it is ensured that same formula production
Product quality of the product in Different Package object is consistent always, is equally also shortened by the function of automatic adjustment temperature and stirring
The time of chelating fertilizer manufacture.
Further, the mixing drum includes the first mixing drum and the second mixing drum, and the first mixing drum passes through the first infusion
Pipe is connected with chelating cylinder, and the second mixing drum is connected by the second perfusion tube with chelating cylinder.Mixing time needed for different raw materials
It is inconsistent with mixing speed, chelating is separately mixed again after stirring sufficiently, is conducive to the homogeneity of ingredient, improves the steady of finished product fertilizer
It is qualitative.
It further, further include spiral feeder and belt conveyer, the spiral feeder and first stir
The feed inlet of cylinder connects, and the belt conveyer connects with the feed inlet of the second mixing drum, the spiral feeder and skin
Band transmission device is driven by variable-frequency motor.Helix transporting device can also initial mixture material during feeding.By frequency conversion
Motor driven can achieve the purpose that quantitative conveying by the transmission speed of the power regulation material of adjusting motor.
Further, solenoid valve and flowmeter, the flowmeter are equipped on first perfusion tube and the second perfusion tube
It is connected with alarm sensor, the alarm sensor and solenoid valve route connection control the opening and closing of solenoid valve.Flowmeter is for examining
Amount of liquid of the flow measurement through perfusion tube when the numerical value of flowmeter reaches setting value, starts alarm sensor, alarm sensor hair automatically
Solenoid valve is automatically closed in signal out, to realize the quantitative addition with material.
Further, the heating device includes heating tube and control switch, the heating tube on the outside of cylinder helically
Shape arrangement, the control switch are connected to controller line.Helical form arrangement, is conducive to be evenly heated.
Further, the agitating device includes that multistep speed regulation motor, agitating shaft and lateral stirring blade, the transverse direction are stirred
Mixing blade includes along spaced first stirring blade of agitating shaft, the second stirring blade and third stirring blade described first
Stirring blade and the setting of third stirring blade vertical stirring axis, second stirring blade and agitating shaft are at an acute angle.Being conducive to will
Material stirs evenly.
Further, the chelating cylinder top is additionally provided with water inlet, and the water inlet is connected with water-supply-pipe, the water-supply-pipe
It is connected, the water-supply-pipe is equipped with solenoid valve and flowmeter, and the flowmeter is connected with alarm sensor, the alarm sensor
With solenoid valve route connection, the opening and closing of solenoid valve is controlled.Flowmeter is for detecting the amount of liquid for flowing through perfusion tube, the number of flowmeter
When value reaches setting value, start alarm sensor automatically, alarm sensor issues signal, solenoid valve is automatically closed, thus real
The quantitative addition of current water.
Further, the water-supply-pipe extends to the top on the inside of chelating cylinder, and water delivery pipe end is equipped with spray head.Liquid and object
Material comes into full contact with, and is conducive to the mixing of material.
Further, the discharge port is connected with filling tube, and the filling tube is equipped with solenoid valve and flowmeter, the stream
Meter is connected with alarm sensor, and the alarm sensor and solenoid valve route connection control the opening and closing of solenoid valve.Flowmeter is used
The amount of liquid of perfusion tube is flowed through in detection, when the numerical value of flowmeter reaches setting value, starts alarm sensor, alarm sensing automatically
Device issues signal, and solenoid valve is automatically closed；When the time that solenoid valve is closed reaches setting time, alarm sensor issues letter
Number, automatically turn on solenoid valve.The time that solenoid valve is closed can determine according to the time of artificial transducer package bucket.
Further, the filling tube is equipped with filter, filling tube be connected with discharge port one end height higher than another
The height at end.The filling of finished product chelating fertilizer is realized using gravity.
The utility model advantage: 1, the agitator setting structures such as return pipe, make material from bottom to top again from top to down and by
Outward inside, it circulates, is sufficiently mixed uniformly, is conducive to chelate, and guarantee the quality of finished product fertilizer.
2, the structures such as chelating cylinder setting controller, can opening according to the intracorporal real time temperature adjust automatically heating device of cylinder
It closes, preferably the intracorporal temperature of application cylinder, it is ensured that chelate the stability of environment, improve the stability of finished product fertilizer.
3, controller can also automatically adjust the mixing speed and mixing time of agitating device, meet stirring for different chelation stages
Demand is mixed, stable product quality, not stratified is made, it is ensured that product quality of the product of same formula production in Different Package object begins
It is consistent eventually.
4, this equipment can realize quantitative feed automatically, and separately stirred, mixed well according to the characteristic of material；Chelating temperature
Degree, time are controllable, and mixing time, speed are also controllable, it is ensured that the stability of finished product chelating fertilizer quality, and than conventional production section
The time has been saved, large-scale production, the application of chelating fertilizer are more advantageous to.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Drawing reference numeral in figure are as follows: 1- agitating device, 2- mixing drum, the first mixing drum of 21-, the second mixing drum of 22-, 3- chela
Close cylinder, 4- feed inlet, 5- refluxing opening, 6- discharge port, 7- return pipe, 8- perfusion tube, the first perfusion tube of 81-, the infusion of 82- second
Pipe, 9- solenoid valve, 10- drawing liquid pump, 11- flowmeter, 12- alarm sensor, 13- spiral feeder, 14- belt transmission dress
It sets, 15- variable-frequency motor, 16- cylinder, 17- heating device, 171- heating tube, 172- control switch, 18- shell, 19- inlet,
20- liquid outlet, 23- temperature sensor, 24- controller, 25- multistep speed regulation motor, 26- agitating shaft, 27- transverse direction stirring blade,
The first stirring blade of 271-, the second stirring blade of 272-, 273- third stirring blade, 28- water inlet, 29- water-supply-pipe, 30- spray
Head, 31- filling tube, 32- filter.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.
As shown in Figure 1, a kind of liquid selenium-rich nutritive chelating fertilizer production equipment, including the mixing drum 2 with agitating device 1 and chela
Close cylinder 3.The mixing drum 2 includes the first mixing drum 21 and the second mixing drum 22, on the first mixing drum 21 and the second mixing drum 22
Portion is equipped with feed inlet 4 and refluxing opening 5, lower part are equipped with discharge port 6, and the discharge port 6 is connected by return pipe 7 with refluxing opening 5,
The return pipe 7 is also connected by perfusion tube 8 with chelating cylinder 3, and solenoid valve 9, institute are equipped on the return pipe 7 and perfusion tube 8
It states and is additionally provided with drawing liquid pump 10 on return pipe 7.First mixing drum 21 is connected by the first perfusion tube 81 with chelating cylinder 3, the second stirring
Cylinder 22 is connected by the second perfusion tube 82 with chelating cylinder 3.Electromagnetism is equipped on first perfusion tube 81 and the second perfusion tube 82
Valve 9 and flowmeter 11, the flowmeter 11 are connected with alarm sensor 12, and the alarm sensor 12 joins with 9 route of solenoid valve
It is logical, control the opening and closing of solenoid valve 9.Quantitative control charging.
It further include spiral feeder 13 and belt conveyer 14, the spiral feeder 13 and the first mixing drum 21
Feed inlet 4 connect, the belt conveyer 14 connects with the feed inlet 4 of the second mixing drum 22, the spiral feeder
13 and belt conveyer 14 by variable-frequency motor 15 drive.
The chelating cylinder 3 includes cylinder 16, heating device 17 and shell 18 set on the outside of cylinder 16, on the cylinder 16
Portion is equipped with inlet 19, lower part is equipped with liquid outlet 20, is equipped with agitating device 1 and temperature sensor 23 in cylinder 16, further includes control
Device 24 processed, the agitating device 1, heating device 17 and temperature sensor 23 are connected to 24 route of controller.
The heating device 17 includes heating tube 171 and control switch 172, and the heating tube 171 is on the outside of cylinder 16
Helical form arrangement, the control switch 172 are connected to 24 route of controller.The agitating device 1 include multistep speed regulation motor 25,
Agitating shaft 26 and lateral stirring blade 27, the transverse direction stirring blade 27 includes along spaced first paddle of agitating shaft 26
Piece 271, the second stirring blade 272 and third stirring blade 273, first stirring blade 271 and third stirring blade 273 hang down
Straight agitating shaft 26 is arranged, and second stirring blade 272 and agitating shaft 26 are at an acute angle.
3 top of chelating cylinder is additionally provided with water inlet 28, and the water inlet 28 is connected with water-supply-pipe 29, the water-supply-pipe 29
It is equipped with solenoid valve 9 and flowmeter 11, the flowmeter 11 is connected with alarm sensor 12, the alarm sensor 12 and electromagnetism
9 route connection of valve controls the opening and closing of solenoid valve 9.Quantitatively control inflow.The water-supply-pipe 29 extends to 3 inside of chelating cylinder
Top, 29 end of water-supply-pipe are equipped with spray head 30.
The discharge port 6 is connected with filling tube 31, and the filling tube 31 is equipped with solenoid valve 9 and flowmeter 11, the stream
Meter 11 is connected with alarm sensor 12, and the alarm sensor 12 and 9 route connection of solenoid valve control the opening and closing of solenoid valve 9.
The filling tube 31 be equipped with filter 32, filling tube 31 be connected with discharge port 6 one end height higher than the other end height.
When production, solid material is passed through to spiral feeder 13 respectively and belt conveyer 14 is transmitted to the first stirring
It is added water and stirred in cylinder 2 and the second mixing drum 2, stirring after a certain period of time, starts drawing liquid pump 10, by the material edge of 2 bottom of mixing drum
Return pipe 7 is extracted into the top of mixing drum 2, stirs material.It is then shut off the solenoid valve 9 on 7 top of return pipe, and is beaten
The solenoid valve 9 on the first perfusion tube 8 or the second perfusion tube 8 is opened, is made in the material transferring mixed in mixing drum 2 to chelating cylinder 3,
It further mixes, chelate under the action of the agitating device 1 and heating device 17 of chelating cylinder 3.During chelating, when temperature sensor 23
When the temperature detected reaches setting upper limit value, controller 24 adjusts the control switch 172 of heating device 17, closes heating device
17.When the temperature that temperature sensor 23 detects reaches preset lower limit, the control that controller 24 adjusts heating device 17 is opened
172 are closed, heating device 17 is started.Since selenium-rich nutritive chelating fertilizer need to generally chelate more than ten days, monitored by temperature sensor 23
Temperature in cylinder 16, and control by controller 24 opening and closing of heating device 17, the preferably temperature in control cylinder 16.
Meanwhile controller 24 can automatically adjust the mixing speed and mixing time of agitating device 1, meet the stirring need of different chelation stages
It asks, makes stable product quality, not stratified, it is ensured that product quality of the product of same formula production in Different Package object always one
It causes.This equipment can realize quantitative feed automatically, and separately stirred, mixed well according to the characteristic of material；Chelates temperature, time can
Control, mixing time, speed are also controllable, it is ensured that the stability and homogeneity of finished product chelating fertilizer quality are conducive to the rule of chelating fertilizer
Modelling production, application.
It should be understood that these embodiments are merely to illustrate the utility model rather than limitation the scope of the utility model.This
Outer to should be understood that after reading the content taught by the present invention, those skilled in the art can make the utility model each
Kind modification or change, these equivalent forms also fall within the scope of the appended claims of the present application.
Claims (10)
1. a kind of liquid selenium-rich nutritive chelating fertilizer production equipment, including the mixing drum with agitating device and chelating cylinder, feature exists
In: the mixing drum top is equipped with feed inlet and refluxing opening, lower part are equipped with discharge port, and the discharge port passes through return pipe and reflux
Mouth is connected, and the return pipe also passes through perfusion tube and is connected with chelating cylinder, and solenoid valve, institute are equipped on the return pipe and perfusion tube
It states and is additionally provided with drawing liquid pump on return pipe；The chelating cylinder includes cylinder, heating device and shell on the outside of cylinder, the cylinder
Body top is equipped with inlet, lower part is equipped with liquid outlet, is equipped with agitating device and temperature sensor in cylinder, further includes controller,
The agitating device, heating device and temperature sensor are connected to controller line.
2. liquid selenium-rich nutritive chelating fertilizer production equipment as described in claim 1, it is characterised in that: the mixing drum includes the
One mixing drum and the second mixing drum, the first mixing drum are connected by the first perfusion tube with chelating cylinder, and the second mixing drum passes through second
Perfusion tube is connected with chelating cylinder.
3. liquid selenium-rich nutritive chelating fertilizer production equipment as claimed in claim 2, it is characterised in that: further include screw feeding dress
Set and belt conveyer, the spiral feeder connect with the feed inlet of the first mixing drum, the belt conveyer with
The feed inlet of second mixing drum connects, and the spiral feeder and belt conveyer are driven by variable-frequency motor.
4. liquid selenium-rich nutritive chelating fertilizer production equipment as claimed in claim 2, it is characterised in that: first perfusion tube and
Solenoid valve and flowmeter are equipped on second perfusion tube, the flowmeter is connected with alarm sensor, the alarm sensor with
Solenoid valve route connection, controls the opening and closing of solenoid valve.
5. liquid selenium-rich nutritive chelating fertilizer production equipment as described in claim 1, it is characterised in that: the heating device includes
Heating tube and control switch, the heating tube arrange that the control switch and controller line connect in the shape of a spiral on the outside of cylinder
It is logical.
6. liquid selenium-rich nutritive chelating fertilizer production equipment as described in claim 1, it is characterised in that: the agitating device includes
Multistep speed regulation motor, agitating shaft and lateral stirring blade, the transverse direction stirring blade includes along agitating shaft spaced first
Stirring blade, the second stirring blade and third stirring blade, first stirring blade and third stirring blade vertical stirring axis
Setting, second stirring blade and agitating shaft are at an acute angle.
7. liquid selenium-rich nutritive chelating fertilizer production equipment as described in claim 1, it is characterised in that: the chelating cylinder top is also
Equipped with water inlet, the water inlet is connected with water-supply-pipe, the water-supply-pipe be equipped with solenoid valve and flowmeter, the flowmeter with
Alarm sensor is connected, and the alarm sensor and solenoid valve route connection control the opening and closing of solenoid valve.
8. liquid selenium-rich nutritive chelating fertilizer production equipment as claimed in claim 7, it is characterised in that: the water-supply-pipe extends to
The top on the inside of cylinder is chelated, water delivery pipe end is equipped with spray head.
9. liquid selenium-rich nutritive chelating fertilizer production equipment as described in claim 1, it is characterised in that: the discharge port with it is filling
Pipe is connected, and the filling tube is equipped with solenoid valve and flowmeter, and the flowmeter is connected with alarm sensor, the alarm sensing
Device and solenoid valve route connection, control the opening and closing of solenoid valve.
10. liquid selenium-rich nutritive chelating fertilizer production equipment as claimed in claim 9, it is characterised in that: set in the filling tube
There is a filter, be connected with the discharge port height of one end of filling tube is higher than the height of the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821155836.9U CN208494227U (en) | 2018-07-20 | 2018-07-20 | Liquid selenium-rich nutrition chelated fertilizer production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821155836.9U CN208494227U (en) | 2018-07-20 | 2018-07-20 | Liquid selenium-rich nutrition chelated fertilizer production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208494227U true CN208494227U (en) | 2019-02-15 |
Family
ID=65290198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821155836.9U Expired - Fee Related CN208494227U (en) | 2018-07-20 | 2018-07-20 | Liquid selenium-rich nutrition chelated fertilizer production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208494227U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620014A (en) * | 2018-07-20 | 2018-10-09 | 广西壮族自治区农业科学院 | Liquid selenium-rich nutrition chelated fertilizer production equipment |
-
2018
- 2018-07-20 CN CN201821155836.9U patent/CN208494227U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620014A (en) * | 2018-07-20 | 2018-10-09 | 广西壮族自治区农业科学院 | Liquid selenium-rich nutrition chelated fertilizer production equipment |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 |