CN210885542U - Drip irrigation equipment water quality filter equipment - Google Patents
Drip irrigation equipment water quality filter equipment Download PDFInfo
- Publication number
- CN210885542U CN210885542U CN201921007838.8U CN201921007838U CN210885542U CN 210885542 U CN210885542 U CN 210885542U CN 201921007838 U CN201921007838 U CN 201921007838U CN 210885542 U CN210885542 U CN 210885542U
- Authority
- CN
- China
- Prior art keywords
- filter
- filter layer
- water
- pipe
- drip irrigation
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000003973 irrigation Methods 0.000 title claims abstract description 39
- 230000002262 irrigation Effects 0.000 title claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 239000006004 Quartz sand Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 241000220317 Rosa Species 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 13
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 241001233242 Lontra Species 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000010865 sewage Substances 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 abstract 5
- 239000012535 impurity Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 4
- 229910052801 chlorine Inorganic materials 0.000 description 4
- 239000000460 chlorine Substances 0.000 description 4
- 238000011001 backwashing Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 235000019634 flavors Nutrition 0.000 description 2
- 150000005826 halohydrocarbons Chemical class 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 208000010543 22q11.2 deletion syndrome Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003181 biological factor Substances 0.000 description 1
- 238000009298 carbon filtering Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Landscapes
- Water Treatment By Sorption (AREA)
Abstract
A water quality filtering device of drip irrigation equipment comprises a filter box, a water inlet pipe with a water inlet valve and connected to the right side of the filter box, and a water outlet pipe with a water outlet valve and connected to the left side of the filter box, wherein a pressure gauge is arranged on the filter box, a multi-stage filtering device is arranged in the filter box, a sewage discharge outlet is arranged at the bottom of the filter box, the water outlet pipe is connected with a back flushing device, the back flushing device comprises a back flushing pipe with a back flushing valve and communicated with the water outlet pipe, a water storage tank connected with the back flushing pipe, an air vent is arranged at the upper end of the water storage tank, and an air compression pump communicated with the water storage tank through an air inlet pipe, a sealing cover is arranged on the air vent, the experimental model realizes the self cleaning function of the device by reversely, the working efficiency of the equipment is effectively improved.
Description
Technical Field
The utility model relates to a drip irrigation equipment technical field especially relates to a drip irrigation equipment water quality filter equipment.
Background
Drip irrigation is a method for uniformly and slowly dripping water and nutrients needed by crops into soil of a crop root zone for local irrigation by using a plastic pipeline, and has the main characteristics of small irrigation amount, long duration time of primary irrigation, short irrigation period, small water service irrigation, accurate control of irrigation amount, reduction of ineffective inter-plant evaporation, no water waste, high water utilization rate of 95 percent, higher water-saving and yield-increasing effects compared with spray irrigation, capability of improving fertilizer efficiency by more than one time by combining fertilization, suitability for irrigation of fruit trees, vegetables, economic crops and greenhouse greenhouses, and the most effective water-saving irrigation mode in dry and water-deficient areas at present; the drip irrigation device has the defects that the drippers are easy to scale and block, the blocking of the irrigator is the most main problem in the current drip irrigation application, the whole system cannot work normally when the drip irrigation device is serious, and the blocking can be caused by physical factors, biological factors or chemical factors, such as silt, organic substances or microorganisms in water and chemical sediments and the like, so that the water quality requirement is strict during drip irrigation, and the water is generally filtered by a filtering device.
Drip irrigation filter equipment among the prior art, mostly adopt centrifugal filter equipment or screen cloth filter equipment, it is simple usually to carry out impurity treatment with the water of water source in the aquatic floats inhales filter equipment, in-process impurity filter equipment at the edulcoration is blockked up very easily, need shut down and adopt the manual work to dismantle the filter screen and wash the blowdown, delayed irrigation time, and work load is very big, work efficiency is low, especially to that kind of filter equipment who seals fixed structure, it is inconvenient to dismantle the change screen cloth, extravagant manpower and materials.
Disclosure of Invention
The utility model aims to provide a: aiming at the problems that the existing filter device for drip irrigation equipment is easy to cause blockage, the filter screen is replaced to artificially clean and discharge sewage, manpower and material resources are wasted, irrigation time is delayed, and the working efficiency is low, the water quality filter device for drip irrigation equipment is provided.
The technical scheme adopted by the invention is as follows:
the utility model provides a drip irrigation equipment water filter equipment, includes the rose box, connects the inlet tube that has inlet valve on rose box right side, connect the left outlet pipe that has outlet valve of rose box, be equipped with the manometer on the rose box, inside is equipped with multi-stage filtration device, and the bottom is connected with the blow off pipe, water piping connection has back flush unit, back flush unit include with the outlet pipe intercommunication have back flush valve the storage water tank that back flush union coupling, setting are in the storage water tank upper end is equipped with the air vent, and through the intake pipe with the air compression pump of storage water tank intercommunication, be equipped with sealed lid on the air vent.
Preferably, the multi-stage filtration device includes the follow the filter box is followed right side and is turned left filter screen filter layer, quartz sand filter layer and the active carbon filter layer that sets gradually, the filter screen filter layer comprises the three-layer filter screen, quartz sand filter layer and active carbon filter layer constitute by cavity form otter board filler, filter screen filter layer, quartz sand filter layer and active carbon filter layer lower extreme are located in the recess of filter box bottom, pass filter screen filter layer, quartz sand filter layer and active carbon filter layer upper end the filter box to pass through the gland with be located gland upside fastener is fixed.
Preferably, the fastening device comprises a lock catch fixedly arranged at the top of the filter box, a bolt plate matched with the lock catch, and a screw rod which is in threaded connection with the center of the bolt plate and presses on the gland.
Preferably, the bottom of the filter box is provided with three drain outlets, the three drain outlets are respectively positioned below the filter screen filter layer, the quartz sand filter layer and the activated carbon filter layer, the drain outlets are connected with drain pipes, and drain valves are arranged on the drain pipes.
Preferably, a liquid level meter is further arranged in the water storage tank.
Preferably, the vent hole and the air inlet of the air compressor pump are both provided with filter screens.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a back flush device's setting, will filter the water back flush multi-stage filtration device, and then realized device self clearance function, avoided the manual work to change the filter screen and wash the blowdown, the effectual work efficiency that has improved;
2. the utility model discloses a multistage filter equipment's setting has strengthened this novel filter effect, utilize the filter screen filter layer to filter the impurity of the large granule in aqueous, the quartz sand filter layer adsorbs suspended solid, organic matter, colloidal particle, microorganism, chlorine, smell flavor and partial heavy metal ion etc. in aqueous, the active carbon filter layer adsorbs harmful substance of son's flavor, son's color, residual chlorine, halohydrocarbon and organic matter etc. in aqueous, the effect of catching reduction turbidity, purification water quality, the condition of dripper scale deposit and jam has been avoided, the life of drip irrigation equipment has been prolonged;
3. the filter layer is fixed inside the filter box through the gland and the fastening device, and the completely closed fixation is not adopted, so that the maintenance is conveniently and periodically carried out on the multistage filter device, and the service life of the filter device can be effectively prolonged;
4. the utility model discloses an all set up the filter screen in air vent and air compressor pump air inlet department, effectively prevented that the impurity in the air from getting into the storage water tank and polluting the back flush clear water, the influence is to multistage filter equipment's back flush effect.
Drawings
FIG. 1 is a top view of a water filtering device of a drip irrigation apparatus;
FIG. 2 is a sectional view of a water filtering device of a drip irrigation apparatus;
FIG. 3 is a left side sectional view of a water filtering device of a drip irrigation apparatus;
labeled as: 1-filter tank, 2-inlet valve, 3-inlet pipe, 4-outlet valve, 5-outlet pipe, 6-pressure gauge, 7-multi-stage filter device, 8-drain outlet, 9-back flush device, 10-back flush valve, 11-back flush pipe, 12-water storage tank, 13-vent hole, 14-air compression pump, 15-sealing cover, 16-filter screen filter layer, 17-quartz sand filter layer, 18-active carbon filter layer, 19-groove, 20-gland, 21-fastening device, 22-lock catch, 23-bolt plate, 24-screw, 25-drain pipe, 26-drain valve, 27-liquid level meter, 28-filter screen, 29-inlet pipe.
Detailed Description
All features disclosed in this specification may be combined in any combination, except features and/or steps that are mutually exclusive.
The present invention will be described in detail with reference to fig. 1, 2 and 3.
Example 1
The utility model provides a drip irrigation equipment water filter equipment, includes rose box 1, connects inlet tube 3, the connection that has inlet valve 2 on rose box 1 right side have outlet pipe 5 that has outlet valve 4 on rose box 1, be equipped with manometer 6 on rose box 1, inside is equipped with multi-stage filtration device 7, and the bottom is equipped with drain 8, outlet pipe 5 is connected with back flush unit 9, back flush unit 9 include with outlet pipe 5 intercommunication have back flush valve 10 back flush pipe 11 storage water tank 12, the setting of back flush pipe 11 connection are in storage water tank 12 upper end is equipped with air vent 13, and through intake pipe 29 with the air compression pump 14 of storage water tank 12 intercommunication, be equipped with sealed lid 15 on air vent 13.
In the embodiment, the water inlet valve 2 and the back washing valve 10 are opened, the water outlet valve 4 is closed, the sealing cover 15 is arranged on the vent hole 13 to keep the internal and external pressures of the water storage tank 12 balanced, then untreated water is introduced into the filter tank 1 through the water inlet pipe 3, and after passing through the multi-stage filter device 7, the water enters the water storage tank 12 through the back washing pipe 11 to be stored for back washing of the multi-stage filter device 7 in the filter tank 1; when the water in the water storage tank 12 is full, the back flush valve 10 is closed, the sealing cover 15 is tightly covered, the water outlet valve 4 is opened, the water after filtration and impurity removal is introduced into a drip irrigation pipeline through the water outlet pipe 5 and drips from a drip irrigation emitter to irrigate crops, after a period of time of work of the multi-stage filtration device 7, impurities are adsorbed on the surface of the multi-stage filtration device 7 to cause pressure change in the filtration tank 1, when the pressure of the filtration tank 1 measured by the pressure gauge 6 reaches a certain value, the water outlet valve 4 and the water inlet valve 2 can be closed, the back flush valve 10 is opened, the air compression pump 14 is started to press the filtered water stored in the storage tank into the back flush pipe 11 and enter the reverse multi-stage filtration device 7 of the filtration tank 1, so that the impurities attached to the multi-stage filtration are flushed and discharged through the sewage discharge outlet 8, the steps are repeated after the back flush, the drip, the utility model discloses a back flush unit 9's setting has realized device self clearance function, has avoided the manual work to change filter screen 28 and has washd the blowdown, the effectual work efficiency that has improved has also improved the life of device.
Example 2
On the basis of embodiment 1, the multi-stage filtration device 7 includes from filter tank 1 turns left filter screen layer 16, quartz sand filter layer 17 and the active carbon filter layer 18 that sets gradually from the right side, filter screen layer 16 comprises three-layer filter net, quartz sand filter layer 17 and active carbon filter layer 18 constitute by cavity form otter board filler, filter screen layer 16, quartz sand filter layer 17 and the 18 lower extreme of active carbon filter layer are located in the recess 19 of filter tank 1 bottom, filter screen layer 16, quartz sand filter layer 17 and the 18 upper end of active carbon filter layer pass filter tank 1 to through gland 20 with be located gland 20 upside fastener 21 is fixed.
In the embodiment, the filter screen filtering layer 16 mainly filters large-particle impurities in water, and the quartz sand filtering layer 17 mainly adsorbs suspended matters, organic matters, colloidal particles, microorganisms, chlorine, odor, partial heavy metal ions and the like in the water, so that the effects of reducing water turbidity and purifying water quality are finally achieved; the activated carbon filter layer 18 can absorb harmful substances such as the sons, the residual chlorine, the halohydrocarbon, the organic matters and the like in water, further purify the water quality to prevent secondary pollution of the water quality, and enhance the novel filter effect by using the multistage filter device 7, thereby avoiding the scaling and blocking of the drippers and prolonging the service life of the drip irrigation equipment; the filter layer is fixed inside the filter box 1 through the gland 20 and the fastening device 21, and the completely closed fixing is not adopted, so that the multi-stage filter device 7 is convenient to carry out maintenance on a regular basis, and the service life of the filter device can be effectively prolonged.
Example 3
On the basis of embodiment 2, the fastening device 21 comprises a latch 22 fixedly arranged at the top of the filter box 1, a bolt plate 23 matched with the latch 22, and a screw 24 which is screwed in the center of the bolt plate 23 and presses on the gland 20.
In this embodiment, when fixing the filter screen filter layer 16, the quartz sand filter layer 17 and the activated carbon filter layer 18, at first cover the upper end of the filter layer with the gland 20, then rotate the screw rod 24, under the cooperation of the lock catch 22 and the bolt plate 23, compress the gland 20, and then realize sealing and fixing the filter layer, the fastening device 21 is rational in infrastructure, and it is convenient to dismantle, is convenient for overhaul and maintain the multi-stage filter device 7.
Example 4
On the basis of embodiment 2, three sewage outlets 8 are arranged at the bottom of the filter box 1, the three sewage outlets 8 are respectively positioned below the filter screen filtering layer 16, the quartz sand filtering layer 17 and the activated carbon filtering layer 18, the sewage outlet 8 is connected with a sewage discharge pipe 25, and a sewage discharge valve 26 is arranged on the sewage discharge pipe 25.
In this embodiment, when carrying out back flush during operation, open blowdown valve 26, the back flush water washes away impurity to in time convenient follow the blow off pipe 25 that corresponds and discharge, improved cleaning performance and blowdown efficiency.
Example 5
In addition to embodiment 1, a liquid level meter 27 is further provided in the water storage tank 12.
In this embodiment, the liquid level meter 27 is disposed in the water storage tank 12, so as to facilitate detection of the water level in the water storage tank 12 during the water storage process, and the liquid level meter 27 can be used to know whether the water in the water storage tank 12 is full or how much water is left, so as to timely close the backwash valve 10 to stop water storage or open the backwash valve 10 to store water.
Example 6
On the basis of the embodiment 1, the air vent 13 and the air inlet of the air compression pump 14 are both provided with filter screens 28.
In this embodiment, the filter screens 28 are disposed on the air vent 13 and at the air inlet of the air compressor 14, so as to prevent impurities in the air from entering the water storage tank 12 to pollute the backwash clear water, which affects the backwash effect of the multistage filter device 7.
Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a drip irrigation equipment water quality filter equipment, includes rose box (1), connects inlet tube (3), the connection that have inlet valve (2) on rose box (1) right side have outlet pipe (5) that have outlet valve (4) on rose box (1) left, its characterized in that: be equipped with manometer (6) on rose box (1), inside is equipped with multi-stage filtration device (7), and the bottom is equipped with drain (8), outlet pipe (5) are connected with back flush unit (9), back flush unit (9) include with outlet pipe (5) intercommunication have back flush pipe (11) of back flush valve (10), storage water tank (12) that back flush pipe (11) are connected, set up and be in storage water tank (12) upper end is equipped with air vent (13), and through intake pipe (29) with air compressor pump (14) of storage water tank (12) intercommunication, be equipped with sealed lid (15) on air vent (13).
2. The water quality filtering device of the drip irrigation equipment according to claim 1, characterized in that: multistage filter equipment (7) include from filter box (1) is followed right side and is turned left filter screen filter layer (16), quartz sand filter layer (17) and activated carbon filter layer (18) that set gradually, filter screen filter layer (16) comprises three-layer filter screen, quartz sand filter layer (17) and activated carbon filter layer (18) are constituteed by cavity form otter board filler, filter screen filter layer (16), quartz sand filter layer (17) and activated carbon filter layer (18) lower extreme are located in recess (19) of filter box (1) bottom, pass filter screen filter layer (16), quartz sand filter layer (17) and activated carbon filter layer (18) upper end filter box (1) to through gland (20) and be located gland (20) upside fastener (21) are fixed.
3. The water quality filtering device of the drip irrigation equipment according to claim 2, characterized in that: the fastening device (21) comprises a lock catch (22) fixedly arranged at the top of the filter box (1), a bolt plate (23) matched with the lock catch (22), and a screw rod (24) in threaded connection with the center of the bolt plate (23) and pressed on the gland (20).
4. The water quality filtering device of the drip irrigation equipment according to claim 2, characterized in that: there are three drain (8) rose box (1) bottom, it is three drain (8) are located respectively be the below of filter screen filter layer (16), quartz sand filter layer (17) and active carbon filter layer (18), drain (8) are connected with blow off pipe (25), be equipped with blowdown valve (26) on blow off pipe (25).
5. The water quality filtering device of the drip irrigation equipment according to claim 1, characterized in that: a liquid level meter (27) is also arranged in the water storage tank (12).
6. The water quality filtering device of the drip irrigation equipment according to claim 1, characterized in that: and filter screens (28) are arranged on the vent holes (13) and at the air inlet of the air compression pump (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921007838.8U CN210885542U (en) | 2019-07-01 | 2019-07-01 | Drip irrigation equipment water quality filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921007838.8U CN210885542U (en) | 2019-07-01 | 2019-07-01 | Drip irrigation equipment water quality filter equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210885542U true CN210885542U (en) | 2020-06-30 |
Family
ID=71321713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921007838.8U Expired - Fee Related CN210885542U (en) | 2019-07-01 | 2019-07-01 | Drip irrigation equipment water quality filter equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210885542U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113598022A (en) * | 2021-06-23 | 2021-11-05 | 中煤建工集团有限公司 | Ecological greening drip irrigation device |
-
2019
- 2019-07-01 CN CN201921007838.8U patent/CN210885542U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113598022A (en) * | 2021-06-23 | 2021-11-05 | 中煤建工集团有限公司 | Ecological greening drip irrigation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105794384A (en) | Multifunctional filtration and fertilization system | |
| CN110981069A (en) | Multistage clearance environment-friendly device of sewage | |
| CN210885542U (en) | Drip irrigation equipment water quality filter equipment | |
| CN112939289A (en) | Rural environmental protection is with concentrated and dual-purpose formula sewage treatment system of dispersion | |
| CN208667290U (en) | A kind of aluminium purification waste water processing unit | |
| CN207361968U (en) | A kind of rainwater purification system | |
| CN207619232U (en) | A kind of septic tank contamination disinfection unit | |
| CN217308808U (en) | Fish manure type sediment collecting and irrigating system based on V-shaped fish tank and floating body farmland | |
| CN212924733U (en) | Novel integrated equipment capable of treating sewage discharge and utilizing | |
| CN205884415U (en) | Closed fish pond circulation clean system | |
| CN207862128U (en) | Sewage multistage is cleared up and purification system | |
| CN213327115U (en) | Sewage treatment device for animal husbandry | |
| CN111705886A (en) | Rainwater collection device for municipal garden based on rainwater reuse technology | |
| CN207958060U (en) | Kitchen waste water processing unit | |
| CN206521348U (en) | A kind of circulating water strainer | |
| CN209797666U (en) | Multifunctional sewage treatment device | |
| CN217217747U (en) | Green wall of irrigating of planting | |
| CN110810206A (en) | Energy-conserving irrigation equipment of afforestation with sewage recovery stage filtering capability | |
| CN210966355U (en) | Plant purifies filtration liquid collection device of stock soil | |
| CN219922202U (en) | Agricultural irrigation equipment for rural sewage reclaimed water | |
| CN210796031U (en) | A waste water recycling system for locking phosphorus agent production | |
| CN210620524U (en) | Utilize new forms of energy rivers to filter hierarchical utilization device | |
| CN213506356U (en) | A purifier for water treatment | |
| CN208517218U (en) | A kind of Ecotourism Region sewage-treatment plant | |
| CN217175029U (en) | Ecological drainage system for greening ecological environment maintenance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20200630 |