CN219156735U - Groundwater pollution prevention and control device - Google Patents

Groundwater pollution prevention and control device Download PDF

Info

Publication number
CN219156735U
CN219156735U CN202320318070.6U CN202320318070U CN219156735U CN 219156735 U CN219156735 U CN 219156735U CN 202320318070 U CN202320318070 U CN 202320318070U CN 219156735 U CN219156735 U CN 219156735U
Authority
CN
China
Prior art keywords
filter screen
box body
push
active carbon
plate
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.)
Active
Application number
CN202320318070.6U
Other languages
Chinese (zh)
Inventor
陈正国
郭祥旭
胡红岩
由勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heilongjiang Institute Of Ecological Geological Survey
Original Assignee
Heilongjiang Institute Of Ecological Geological Survey
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heilongjiang Institute Of Ecological Geological Survey filed Critical Heilongjiang Institute Of Ecological Geological Survey
Priority to CN202320318070.6U priority Critical patent/CN219156735U/en
Application granted granted Critical
Publication of CN219156735U publication Critical patent/CN219156735U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Filtration Of Liquid (AREA)

Abstract

The utility model discloses a device for preventing and controlling groundwater pollution, which relates to the technical field of water treatment and comprises a box body, wherein the top of the box body is provided with a water inlet, the bottom of the box body is provided with a water outlet, a filtering component, a medicament spraying component and a stirring component are sequentially arranged in the box body from top to bottom, the filtering component comprises a first filter screen, a second filter screen and an active carbon filter plate which are sequentially arranged from top to bottom, a filter screen scraper is arranged above the first filter screen, the filter screen scraper is driven by a transverse driving device to translate on the first filter screen, the side wall of the box body is provided with an impurity outlet corresponding to the first filter screen and used for discharging scraped impurities, the side wall of the box body is provided with a filter screen port and an active carbon filter plate port, the second filter screen and the active carbon filter plate are respectively and slidably inserted into the filter screen port and the active carbon filter plate port, the medicament spraying component comprises a spray pipe and a plurality of spray heads which are uniformly arranged on the spray pipe for spraying water treatment medicament into the box body. The filter component is easy to clean, the treatment agent and water are mixed well, and the purification effect is improved.

Description

Groundwater pollution prevention and control device
Technical Field
The utility model relates to the technical field of water treatment, in particular to a device for preventing and controlling groundwater pollution.
Background
After the groundwater is polluted, the quality of urban water supply is greatly reduced, and various prevention and treatment devices are layered endlessly aiming at how to prevent and treat the urban groundwater pollution.
Patent CN216997914U discloses a filtration purification device for groundwater pollution control, one side of the device main body is provided with a treating agent box, the inside of the device main body is provided with a filter screen, the lower side of the filter screen is provided with a stirring shaft, one side of the stirring shaft is provided with stirring blades, and the lower side of the stirring shaft is provided with a filter plate. After the underground water is filtered through the filter screen, the treating agent is added into the device main body through the treating agent box, the treating agent and the water body are stirred and mixed for treatment under the stirring of the stirring shaft and the stirring blades, and then the treated water body is filtered through the filter plate. However, in the above patent, after long-time use, some impurities are easily accumulated on the filter screen and the filter plate, cleaning is difficult, and the mixing effect of the treating agent and the water body is poor, which easily results in incomplete treatment of the water and poor purifying effect.
Disclosure of Invention
The utility model aims to provide a device for preventing and treating groundwater pollution, which solves the problems in the prior art, the filter assembly is easy to clean, the mixing effect of the treating agent and water is good, and the purifying effect is improved.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides a device for preventing and treating groundwater pollution, which comprises a box body, wherein a water inlet is arranged at the top of the box body, a water outlet is arranged at the bottom of the box body, a filtering assembly, a medicament spraying assembly and a stirring assembly are sequentially arranged in the box body from top to bottom, the filtering assembly comprises a first filter screen, a second filter screen and an activated carbon filter plate which are sequentially arranged from top to bottom, a filter screen scraping plate is arranged above the first filter screen, the filter screen scraping plate is driven by a transverse driving device to horizontally move on the first filter screen to scrape impurities on the surface of the first filter screen, an impurity outlet corresponding to the first filter screen is arranged on the side wall of the box body, the filter screen scraping plate pushes the impurities to the impurity outlet and is discharged, a filter screen opening and an activated carbon filter plate opening are arranged on the side wall of the box body, the second filter screen and the activated carbon filter plate are respectively and slidably inserted in the filter screen opening, the medicament spraying assembly comprises a spraying pipe and a spray nozzle, the spraying pipe is arranged below the activated carbon filter plate, and a plurality of spray nozzles are uniformly arranged on the side wall of the filter screen and are used for spraying medicament into a water treatment box.
Preferably, the transverse driving device comprises a sliding plate, a screw rod, screw rod nuts and a driving motor, wherein two ends of the sliding plate are slidably arranged in a sliding groove in the box body through a sliding block, the screw rod nuts are fixedly connected to the sliding plate, the screw rod is perpendicular to the sliding plate and is in threaded connection with the screw rod nuts, two ends of the screw rod are rotatably connected to the box body, the driving motor is connected with the screw rod and is used for driving the screw rod to rotate, and the filter screen scraping plate is connected to the lower end of the sliding plate.
Preferably, the filter screen scraper blade is connected through the pivot rotation the slide lower extreme, the filter screen scraper blade with the impurity outlet is relative one side upper end sets up the chamfer, and opposite side upper end is right angle spacing portion, the slide is removed and is close to when the impurity outlet, right angle spacing portion with the terminal surface is spacing each other under the slide, makes the filter screen scraper blade keeps vertical state in order to strike off first filter screen surface's impurity, the slide is removed and is kept away from when the impurity outlet under the effect of chamfer, make the filter screen scraper blade can be to being close to one side swing of impurity outlet.
Preferably, the stirring assembly comprises a first stirring shaft and a second stirring shaft which are arranged side by side, the first stirring shaft and the second stirring shaft are connected in the box body in a rotating mode, a plurality of stirring blades are arranged on the first stirring shaft and the second stirring shaft, a first driving wheel is connected on the first stirring shaft, a second driving wheel is connected on the second stirring shaft, the first driving wheel is connected with the second driving wheel through belt transmission, and the first stirring shaft is driven to rotate by a stirring motor.
Preferably, the first driving wheel and the second driving wheel have the same diameter or the diameter of the first driving wheel is larger than that of the second driving wheel.
Preferably, one end of the second filter screen is connected with a push-pull sealing plate, a handle is arranged on the outer side of the push-pull sealing plate, and the inner side of the push-pull sealing plate is in sealing connection with the box body through a first sealing ring.
Preferably, first through holes are formed in two ends of the push-pull sealing plate and are used for penetrating through bolts and fastening the push-pull sealing plate on the box body through the bolts.
Preferably, the activated carbon filter plate comprises a push-pull drawer frame and an activated carbon module, wherein the activated carbon module is arranged in the push-pull drawer frame, the bottom surface of the push-pull drawer frame is in a grid structure, and the push-pull drawer frame is in sealing connection with the box body through a second sealing ring.
Preferably, the push-pull drawer frame is fixedly connected with the box body through bolts.
Compared with the prior art, the utility model has the following technical effects:
the utility model provides a groundwater pollution control device, which drives a filter screen scraping plate to translate on a first filter screen through a transverse driving device so as to scrape impurities on the surface of the first filter screen, pushes the impurities to an impurity outlet and discharges the impurities, is convenient for cleaning the first filter screen, and a second filter screen and an activated carbon filter plate are respectively and slidably inserted into a filter screen opening and an activated carbon filter plate opening, so that the second filter screen and the activated carbon filter plate are conveniently pulled out of a box body to be conveniently cleaned.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the internal structure of the groundwater pollution control device provided by the utility model;
fig. 2 is a front view of the groundwater pollution control device provided by the utility model;
FIG. 3 is a schematic diagram of a connection structure between a screen scraper and a lateral driving device according to the present utility model;
FIG. 4 is a schematic diagram of a side view connection structure of a screen scraper and a slide plate according to the present utility model;
FIG. 5 is a schematic perspective view of a connection structure between a second filter screen and a push-pull sealing plate according to the present utility model;
FIG. 6 is a side view of a connection structure of a second screen and a push-pull sealing plate according to the present utility model;
FIG. 7 is a schematic diagram of a push-pull drawer frame and an activated carbon module according to the present utility model;
in the figure: 1-box, 2-water inlet, 3-delivery port, 4-filter unit, 5-medicament spray unit, 6-stirring unit, 7-first filter screen, 8-second filter screen, 9-active carbon filter board, 10-filter screen scraper blade, 11-impurity export, 12-shower, 13-shower nozzle, 14-slide, 15-lead screw, 16-lead screw nut, 17-driving motor, 18-slider, 19-pivot, 20-chamfer, 21-right angle limit, 22-first stirring shaft, 23-second stirring shaft, 24-stirring leaf, 25-first drive wheel, 26-second drive wheel, 27-push-pull sealing plate, 28-handle, 29-first sealing ring, 30-first through hole, 31-push-pull drawer frame, 32-active carbon module, 33-guide rod.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a device for preventing and treating groundwater pollution, which solves the problems in the prior art, a filter assembly is easy to clean, the mixing effect of a treating agent and water is good, and the purifying effect is improved.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1-7, this embodiment provides a groundwater pollution prevention and control device, including box 1, box 1 top is equipped with water inlet 2, the bottom is equipped with delivery port 3, be equipped with filter unit 4 from top to bottom in proper order in box 1, medicament spray unit 5 and stirring subassembly 6, filter unit 4 includes first filter screen 7 that sets gradually from top to bottom, second filter screen 8 and active carbon filter plate 9, first filter screen 7 top is equipped with filter screen scraper 10, filter screen scraper 10 is driven by horizontal drive arrangement and translates on first filter screen 7 in order to strike off the impurity on first filter screen 7 surface, the box 1 lateral wall is equipped with impurity export 11 corresponding with first filter screen 7, when filter screen scraper 10 moves to the direction that is close to impurity export 11 on first filter screen 7, push away impurity to impurity export 11 and discharge, be equipped with filter screen mouth and active carbon filter plate mouth on box 1 lateral wall, second filter screen 8 and active carbon filter plate 9 slide respectively and insert in locating filter screen mouth and active carbon filter plate mouth, medicament spray unit 5 includes shower 12 and shower nozzle 13, tube 12 sets up in active carbon filter plate 9 below in order to strike-off the shower nozzle 13, evenly be equipped with a plurality of spray 1 to spray to the water to the box 1.
When the water treatment device is used, water enters the box body 1 from the water inlet 2, is filtered by the first filter screen 7, the second filter screen 8 and the activated carbon filter plate 9 in sequence, then is mixed with the agent sprayed by the spray head 13, falls to the bottom of the box body 1, and is uniformly mixed with the water treatment agent and the water under the stirring of the stirring assembly 6, so as to treat the water. Wherein the pore size of the second filter screen 8 is smaller than that of the first filter screen 7. When the impurity on the first filter screen 7 needs to be cleaned, the filter screen scraping plate 10 is driven by the transverse driving device to horizontally move on the first filter screen 7 and is close to the impurity outlet 11, the impurity on the surface of the first filter screen 7 is scraped off, the impurity is pushed to the impurity outlet 11 and discharged, the first filter screen 7 is very convenient to clean, and when the second filter screen 8 and the activated carbon filter plate 9 need to be cleaned, the second filter screen 8 and the activated carbon filter plate 9 are pulled out from the box body 1 to be cleaned, so that the cleaning is very convenient. The water treatment medicament is sprayed into the box body 1 through the spray heads 13, and the medicament is sprayed uniformly, so that the medicament and water are more easily and uniformly mixed, the mixing effect is improved under the stirring effect of the stirring assembly 6, and the purifying effect is further improved.
In this embodiment, the transverse driving device includes a slide plate 14, a screw rod 15, a screw rod nut 16 and a driving motor 17, two ends of the slide plate 14 are slidably disposed in a chute in the box body 1 through a slide block 18, the screw rod nut 16 is fixedly connected to the slide plate 14, the screw rod 15 is perpendicular to the slide plate 14 and is in threaded connection with the screw rod nut 16, two ends of the screw rod 15 are rotatably connected to the box body 1, the driving motor 17 is connected with the screw rod 15, and is used for driving the screw rod 15 to rotate, and the filter screen scraping plate 10 is connected to the lower end of the slide plate 14. The screw nut 16 is connected to one end of the sliding plate 14, the other end of the sliding plate 14 is slidably connected with the guide rod 33, the driving motor 17 drives the screw 15 to rotate, and under the guiding action of the guide rod 33, the sliding plate 14 is driven to translate, so that the filter screen scraping plate 10 is driven to translate.
In this embodiment, the filter screen scraper 10 is rotatably connected at the lower end of the sliding plate 14 through the rotating shaft 19, the upper end of one side of the filter screen scraper 10 opposite to the impurity outlet 11 is provided with a rounding angle 20, the upper end of the other side is a right-angle limiting part 21, when the sliding plate 14 moves close to the impurity outlet 11, the right-angle limiting part 21 and the lower end surface of the sliding plate 14 are mutually limited, so that the filter screen scraper 10 keeps a vertical state to scrape the impurities on the surface of the first filter screen 7, and when the sliding plate 14 moves away from the impurity outlet 11, the filter screen scraper 10 can swing towards one side close to the impurity outlet 11 under the action of the rounding angle 20. In the initial state, the screen wiper 10 is located at an end remote from the foreign matter outlet 11. When the first filter screen 7 needs to be cleaned, the filter screen scraping plate 10 moves to be close to the impurity outlet 11, and at the moment, the filter screen scraping plate 10 is kept vertical to scrape impurities on the surface of the first filter screen 7 better; when the filter screen scraper 10 reversely returns, the filter screen scraper 10 swings to one side of the impurity outlet 11, so that the filter screen scraper 10 is prevented from continuously scraping the surface of the first filter screen 7, and the filter screen scraper 10 can return to the initial position more easily.
In this embodiment, the stirring assembly 6 includes a first stirring shaft 22 and a second stirring shaft 23 that are arranged side by side, the first stirring shaft 22 and the second stirring shaft 23 are rotatably connected in the box 1, a plurality of stirring blades 24 are respectively arranged on the first stirring shaft 22 and the second stirring shaft 23, a first driving wheel 25 is connected on the first stirring shaft 22, a second driving wheel 26 is connected on the second stirring shaft 23, the first driving wheel 25 is connected with the second driving wheel 26 through belt transmission, and the first stirring shaft 22 is driven to rotate by a stirring motor. The first stirring shaft 22 is driven to rotate by the stirring motor, and the first stirring shaft 22 rotates to drive the second stirring shaft 23 to rotate, so that the aim of stirring simultaneously by stirring blades 24 on the two stirring shafts is fulfilled, the stirring effect is improved, and the medicament and water are more uniformly mixed.
In this embodiment, the diameter of the first driving wheel 25 is larger than that of the second driving wheel 26, so that the rotation angular speeds of the first stirring shaft 22 and the second stirring shaft 23 are different, so as to form different stirring rotation speeds on two sides of the box 1, and improve the stirring effect. In other embodiments, the first drive wheel 25 is of equal diameter to the second drive wheel 26.
In this embodiment, one end of the second filter screen 8 is connected with a push-pull sealing plate 27, a handle 28 is arranged on the outer side of the push-pull sealing plate 27, and the inner side of the push-pull sealing plate 27 is in sealing connection with the box body 1 through a first sealing ring 29. The handle 28 is convenient for carrying out the plug operation to the second filter screen 8, and the sealing performance of the push-pull sealing plate 27 and the box body 1 is ensured through the arrangement of the first sealing ring 29.
In this embodiment, the two ends of the push-pull sealing plate 27 are provided with the first through holes 30, which are used for penetrating the bolts and fastening the push-pull sealing plate 27 on the box 1 through the bolts, so that the connection is reliable and the disassembly and the assembly are convenient.
In this embodiment, the activated carbon filter plate 9 includes a push-pull drawer frame 31 and an activated carbon module 32, the activated carbon module 32 is disposed in the push-pull drawer frame 31, the bottom surface of the push-pull drawer frame 31 is in a grid structure, and the push-pull drawer frame 31 is in sealing connection with the box body 1 through a second sealing ring. After the push-pull drawer frame 31 is pulled out, the activated carbon module 32 is taken out for cleaning or replacement, and the operation is convenient. The push-pull drawer frame 31 is in sealing connection with the box body 1 through the second sealing ring, and the sealing performance is good.
In this embodiment, the push-pull drawer frame 31 is fastened and connected with the box body 1 through bolts, so that the connection is reliable and the disassembly and assembly are convenient.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims (9)

1. The utility model provides a groundwater pollution control device which characterized in that: the device comprises a box body, the box top is equipped with the water inlet, and the bottom is equipped with the delivery port, be equipped with filter unit, medicament spray subassembly and stirring subassembly from top to bottom in proper order in the box, filter unit includes from top to bottom first filter screen, second filter screen and the active carbon filter board that sets gradually, first filter screen top is equipped with the filter screen scraper blade, the filter screen scraper blade is in by horizontal drive arrangement drive translation on the first filter screen in order to strike off the impurity on first filter screen surface, the box lateral wall be equipped with the corresponding impurity export of first filter screen, the filter screen scraper blade is in when being close to on the first filter screen the direction of impurity export removes, push the impurity to impurity export and discharge, be equipped with filter screen mouth and active carbon filter board mouth on the box lateral wall, the second spray filter screen with the active carbon filter board slides respectively and inserts to locate filter screen mouth with in the active carbon filter board mouth, the medicament spray subassembly including pipe and shower nozzle, the pipe set up in active carbon below, evenly be equipped with a plurality of shower nozzles for spraying into the box to the treatment medicament.
2. The groundwater pollution control device according to claim 1, wherein: the transverse driving device comprises a sliding plate, a screw rod, screw rod nuts and a driving motor, wherein two ends of the sliding plate are slidably arranged in a sliding groove in the box body through the sliding blocks, the screw rod nuts are fixedly connected to the sliding plate, the screw rod is perpendicular to the sliding plate and is in threaded connection with the screw rod nuts, two ends of the screw rod are rotatably connected to the box body, the driving motor is connected with the screw rod and is used for driving the screw rod to rotate, and the filter screen scraping plate is connected to the lower end of the sliding plate.
3. The groundwater pollution control device according to claim 2, wherein: the filter screen scraping plate is rotationally connected with the lower end of the sliding plate through a rotating shaft, a round angle is arranged at the upper end of one side of the filter screen scraping plate opposite to the impurity outlet, a right-angle limiting part is arranged at the upper end of the other side of the filter screen scraping plate, when the sliding plate moves close to the impurity outlet, the right-angle limiting part and the lower end surface of the sliding plate are mutually limited, the filter screen scraper is kept in a vertical state to scrape impurities on the surface of the first filter screen, and when the sliding plate moves away from the impurity outlet, the filter screen scraper can swing to one side close to the impurity outlet under the effect of the rounding angle.
4. The groundwater pollution control device according to claim 1, wherein: the stirring assembly comprises a first stirring shaft and a second stirring shaft which are arranged side by side, the first stirring shaft and the second stirring shaft are connected in the box body in a rotating mode, a plurality of stirring blades are arranged on the first stirring shaft and the second stirring shaft respectively, a first driving wheel is connected on the first stirring shaft, a second driving wheel is connected on the second stirring shaft, the first driving wheel is connected with the second driving wheel through belt transmission, and the first stirring shaft is driven to rotate by a stirring motor.
5. The groundwater pollution control device according to claim 4, wherein: the diameters of the first driving wheel and the second driving wheel are equal or the diameter of the first driving wheel is larger than that of the second driving wheel.
6. The groundwater pollution control device according to claim 1, wherein: the second filter screen one end is connected with the push-and-pull closing plate, the push-and-pull closing plate outside is equipped with the handle, the push-and-pull closing plate inboard through first sealing washer with box sealing connection.
7. The groundwater pollution control device according to claim 6, wherein: the push-pull sealing plate is provided with first through holes at two ends for penetrating through the bolts and fastening the push-pull sealing plate on the box body through the bolts.
8. The groundwater pollution control device according to claim 1, wherein: the active carbon filter comprises a push-pull drawer frame and an active carbon module, wherein the active carbon module is arranged in the push-pull drawer frame, the bottom surface of the push-pull drawer frame is in a grid structure, and the push-pull drawer frame is in sealing connection with the box body through a second sealing ring.
9. The groundwater pollution control device according to claim 8, wherein: the push-pull drawer frame is fixedly connected with the box body through bolts.
CN202320318070.6U 2023-02-27 2023-02-27 Groundwater pollution prevention and control device Active CN219156735U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320318070.6U CN219156735U (en) 2023-02-27 2023-02-27 Groundwater pollution prevention and control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320318070.6U CN219156735U (en) 2023-02-27 2023-02-27 Groundwater pollution prevention and control device

Publications (1)

Publication Number Publication Date
CN219156735U true CN219156735U (en) 2023-06-09

Family

ID=86642649

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320318070.6U Active CN219156735U (en) 2023-02-27 2023-02-27 Groundwater pollution prevention and control device

Country Status (1)

Country Link
CN (1) CN219156735U (en)

Similar Documents

Publication Publication Date Title
CN208613307U (en) A kind of building dust cleaning case cleaning device
CN216273502U (en) Coal fired power plant desulfurization waste water reuse's processing apparatus
CN215539730U (en) Easy-to-clean desulfurizing tower for flue gas treatment
CN219156735U (en) Groundwater pollution prevention and control device
CN117700056A (en) Multistage treatment device for continuous treatment of industrial wastewater
CN117225127B (en) Self-cleaning treatment equipment for waste gas containing particulate pollutants
CN219168057U (en) Industrial VOCs treatment equipment
CN219128837U (en) Exhaust-gas treatment spray column that can prevent jam
CN112174388B (en) Treatment system and treatment process for industrial degradation-resistant organic wastewater
CN110644592B (en) Solid-liquid filtering device for drainage system and use method thereof
CN114230047A (en) Deep sewage purification device
CN221846678U (en) Waste gas treatment equipment
CN220877969U (en) Sewage treatment device for live pig breeding
CN221287311U (en) Exhaust gas purification device for rubber production and processing
CN117865398B (en) High concentration organic industrial wastewater treatment device
CN219572803U (en) Multi-angle spray cooling tower
CN218988955U (en) Sewage sedimentation tank for water treatment
CN221656100U (en) Waste gas treatment equipment in cement manufacture of environmental protection
CN221831763U (en) Back flush filter for treating sewage
CN216986956U (en) Environment-friendly construction dust collector
CN118320569B (en) Electrostatic spraying exhaust gas purification device
CN220142774U (en) Self-cleaning filter
CN220194410U (en) Air dust removal device
CN219984113U (en) Full-automatic roller micro-filter
CN221471099U (en) Water treatment facilities cleaning device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant