CN218077128U - Prevent environmental protection dust collector for construction of jam - Google Patents

Prevent environmental protection dust collector for construction of jam Download PDF

Info

Publication number
CN218077128U
CN218077128U CN202222236660.2U CN202222236660U CN218077128U CN 218077128 U CN218077128 U CN 218077128U CN 202222236660 U CN202222236660 U CN 202222236660U CN 218077128 U CN218077128 U CN 218077128U
Authority
CN
China
Prior art keywords
dust removal
dust
automobile body
removal case
filter screen
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
CN202222236660.2U
Other languages
Chinese (zh)
Inventor
陈威
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.)
Ark Engineering Management Co ltd
Original Assignee
Ark Engineering Management Co ltd
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 Ark Engineering Management Co ltd filed Critical Ark Engineering Management Co ltd
Priority to CN202222236660.2U priority Critical patent/CN218077128U/en
Application granted granted Critical
Publication of CN218077128U publication Critical patent/CN218077128U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Landscapes

  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The utility model discloses a prevent environmental protection dust collector for construction of jam, which comprises a carriage body, this automobile body one side is provided with the automobile body backplate, this automobile body four corners all is provided with removes the wheel, this automobile body backplate one side top is provided with the handle, automobile body top one side is provided with the dust removal case, the inside of dust removal case is provided with filtering mechanism, the top of dust removal case is provided with the blast pipe, filtering mechanism's bottom just is located the dust removal incasement bottom and is provided with the collection frame, the one end of collecting the frame is provided with the handle, dust removal case lateral wall is provided with the dust catcher, one side of dust catcher is connected with the dust absorption pipe, the tip of dust absorption pipe runs through the automobile body and is connected with the suction hood. The utility model has the advantages of reasonable and reliable structure, easy operation can atomize to building site surrounding environment and press down dirt dust removal, when preventing that the dust from raising and causing the pollution, can also clear away adnexed impurity on the filter screen to can ensure the normal work of filter screen, improve filtration efficiency, and then improve work efficiency.

Description

Prevent environmental protection dust collector for construction of jam
Technical Field
The utility model relates to an environmental protection technology field particularly, relates to a prevent environmental protection dust collector for construction of jam.
Background
The construction site which is visible everywhere also avoids people from seeing dust flying, and recently, a plurality of cities have serious air pollution which is mainly caused by pollutant discharge exceeding standard, wherein the dust discharge exceeding standard is one of main factors, so dust removal is the key for controlling air pollution. The existing dust removal method generally adopts a watering cart or manual watering, and the dust removal method has the disadvantages of higher equipment or labor cost, large water consumption, unsatisfactory dust removal effect and incapability of effectively removing dust.
For example, patent No. CN207769450U discloses an environment-friendly building construction dust removing device, which includes a vehicle body, a cleaning device, a dust collector, a dust baffle, a filter, an air-to-ground sprayer, a large water pump, a small water pump, a storage battery, a control panel and a push handle, wherein the cleaning device is arranged at the bottom of the vehicle body, the dust collector is closely adjacent to the cleaning device and is located behind the cleaning device, a dust collecting cavity is arranged in the front of the vehicle body, a dust outlet of the dust collector is communicated with the dust collecting cavity, an air outlet communicated with the dust collecting cavity is arranged at the upper part of the front end of the vehicle body, the filter is arranged at the air outlet, a water storage cavity is arranged in the middle of the vehicle body, the air-to-spray device is arranged at the top end of the middle of the vehicle body, the ground-to-ground sprayer is arranged at the bottom end of the vehicle body, the large water pump and the small water pump are arranged at the lower part of the rear part of the vehicle body, and the water outlets of the large water pump and the small water pump are respectively communicated with nozzles of the air-to-ground sprayer.
However, the dust removing apparatus has the following disadvantages: the cleaning device is arranged at the bottom of the vehicle body, the dust removal device is low in cost, high in automation degree, convenient to use, labor-saving, small in water consumption and good in dust removal effect, when the dust collection cavity on the vehicle body of the dust removal device exhausts, the dust sucked by the dust collector easily blocks the filter screen of the air outlet, and the dust collector sucks dust which is not only dust but also contains large flaky sundries, so that the filter screen is easy to block, and subsequent work is influenced.
An effective solution to the problems in the related art has not been proposed yet.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a not enough to prior art, the utility model provides a prevent environmental protection dust collector for construction of jam possesses the advantage that can carry out bitter quick clear away to adnexed impurity on the filter screen, and then takes place blocking phenomenon's problem easily when solving the adnexed great more impurity on the filter screen.
(II) technical scheme
Carry out bitter advantage of driving fast for realizing adnexed impurity on above-mentioned filter screen, the utility model discloses a concrete technical scheme as follows:
the utility model provides a prevent environmental protection dust collector for construction of jam, which comprises a carriage body, this automobile body one side is provided with the automobile body backplate, this automobile body four corners all is provided with removes the wheel, this automobile body backplate one side top is provided with the handle, automobile body top one side is provided with the dust removal case, the inside of dust removal case is provided with filtering mechanism, the top of dust removal case is provided with the blast pipe, filtering mechanism's bottom just is located the dust removal incasement bottom and is provided with the collection frame, the one end of collecting the frame is provided with the handle, a dust removal case lateral wall is provided with the dust catcher, one side of dust catcher is connected with the dust absorption pipe, the tip of dust absorption pipe runs through the automobile body and is connected with the suction hood.
Further, in order to atomize and suppress dust and remove dust by extracting water in the water tank, the dust is prevented from being raised to cause pollution, the other side of the top end of the vehicle body is provided with a support frame, the top of the support frame is provided with the water tank, the water pump is kept connected with the water tank through a pipeline, one side of the water pump is provided with a water pipe, and the water pipe is of a T-shaped structure and is provided with atomizing nozzles at two ends.
Further, in order to collect the frame in the effect of spout, the cooperation that can be better moves with earth to play spacing effect for the removal of collecting the frame, thereby guarantee to collect the stability of frame operation, the bilateral symmetry of collecting the frame is provided with the sand grip, the inside both sides wall bottom of dust removal case all seted up with sand grip matched with spout, and the sand grip is the isosceles trapezoid shape with the spout cross section, automobile body backplate top one side is provided with the control panel.
Further, in order to get rid of the impurity that adsorbs on the filter screen, thereby avoided the filter screen can adsorb some impurity after long-time work, can make the filter screen guarantee normal work, can not influence the filter effect of filter screen, and simultaneously, the change and the maintenance of staff to the filter screen have still been reduced, and then the manpower has been saved, the work efficiency is improved, filtering mechanism is including setting up the filter screen at dust removal incasement portion, the both sides middle part on filter screen top all is provided with the riser, the inside of riser is provided with the pole setting, the top lateral wall of pole setting runs through and is provided with the disc, filtering mechanism is still including setting up the mounting panel at dust removal incasement portion lateral wall, the top of mounting panel is provided with the motor, the one end of motor output shaft just is located the inside of dust removal case and is provided with the round bar, and the tip at round bar both ends is eccentric respectively runs through the lateral wall of disc and is connected with the inner wall of dust removal case through the bearing.
Further, in order to realize being connected between riser and the pole setting to can drive the filter screen and can carry out up-and-down reciprocating motion under the rotation of motor, the through-hole has been seted up to the lateral wall of riser, and the arc wall has all been seted up to top and bottom in the through-hole, and the top lateral wall of pole setting has been seted up with disc matched with perforation, and the top and the bottom of pole setting all set up to the arcwall face, and the arcwall face cooperatees with the arc wall.
(III) advantageous effects
Compared with the prior art, the utility model provides a prevent environmental protection dust collector for construction of jam possesses following beneficial effect:
(1) The utility model has the advantages of reasonable and reliable structure, easy operation can atomize to building site surrounding environment and press down dirt dust removal, when preventing that the dust from raising and causing the pollution, can also clear away adnexed impurity on the filter screen to can ensure the normal work of filter screen, improve filtration efficiency, and then improve work efficiency.
(2) Through setting up water pump and atomizer to can extract the inside water of water tank and atomize to press down dirt dust removal to the surrounding environment, prevent that the dust from raising and causing the pollution, and then accelerate the dust removal progress.
(3) Through setting up filtering mechanism to can get rid of the impurity that adsorbs on the filter screen, thereby avoided the filter screen can adsorb some impurity after long-time work, can make the filter screen guarantee normal work, can not influence the filter effect of filter screen, simultaneously, still reduced the change and the maintenance of staff to the filter screen, and then saved the manpower, improved work efficiency.
(4) Through setting up sand grip and spout to under the effect of spout, the frame is collected in cooperation that can be better moves with earth, and plays spacing effect for the removal of collecting the frame, and then guarantees to collect the stability of frame operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used 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 invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a perspective view of an anti-clogging environment-friendly dust removing device for building construction according to an embodiment of the present invention;
FIG. 2 is a second perspective view of the anti-clogging environmental protection dust-removing device for building construction according to the embodiment of the present invention;
FIG. 3 is a bottom perspective view of the anti-clogging environmental protection dust-removing device for building construction according to the embodiment of the present invention;
fig. 4 is a partial sectional view of the anti-clogging environment-friendly dust removing device for building construction according to the embodiment of the invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic structural diagram of a filtering mechanism in the anti-clogging environment-friendly dust removing device for building construction according to the embodiment of the present invention;
fig. 7 is a schematic structural diagram of a vertical plate in the anti-clogging environment-friendly dust removing device for building construction according to the embodiment of the invention;
fig. 8 is a schematic structural diagram of a vertical rod in the anti-clogging environment-friendly dust removing device for building construction according to the embodiment of the present invention.
In the figure:
1. a vehicle body; 2. a vehicle body back plate; 3. a moving wheel; 4. a handle; 5. a dust removal box; 6. a filtering mechanism; 601. a filter screen; 602. a vertical plate; 6021. a through hole; 6022. an arc-shaped slot; 603. erecting a rod; 6031. perforating; 604. a disc; 605. mounting a plate; 606. a motor; 607. a round bar; 7. an exhaust pipe; 8. a collection frame; 9. a handle; 10. a vacuum cleaner; 11. a dust collection pipe; 12. a dust hood; 13. a support frame; 14. a water tank; 15. a water pump; 16. a water pipe; 17. an atomizing spray head; 18. a convex strip; 19. a chute; 20. a control panel.
Detailed Description
For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.
According to the utility model discloses an embodiment provides an environmental protection dust collector for construction of preventing blockking up.
Now combine the attached drawing and detailed description mode right the utility model discloses it is further explained, as shown in fig. 1-8, according to the utility model discloses a prevent environmental protection dust collector for construction of jam, including automobile body 1, this automobile body 1 one side is provided with automobile body backplate 2, 1 four corners of this automobile body all is provided with removes wheel 3, 2 one side tops of this automobile body backplate are provided with handle 4, 1 top one side of automobile body is provided with dust removal case 5, the inside of dust removal case 5 is provided with filter mechanism 6, the top of dust removal case 5 is provided with blast pipe 7, the bottom of filter mechanism 6 just is located dust removal case 5 bottom and is provided with collection frame 8, the one end of collecting frame 8 is provided with handle 9, a dust catcher 10 is provided with dust catcher 10 to dust removal case 5 lateral wall, one side of dust catcher 10 is connected with dust absorption pipe 11, dust absorption pipe 11's tip runs through automobile body 1 and is connected with suction hood 12.
With the aid of above-mentioned technical scheme, through setting up water pump 15 and atomizer 17 to can extract 14 inside waters of water tank and atomize to press down the dirt dust removal to the surrounding environment, prevent that the dust from raising and causing the pollution, and then accelerate the dust removal progress. Through setting up filtering mechanism 6 to can get rid of the impurity of adsorbing on the filter screen 601, thereby avoided filter screen 601 to adsorb some impurity after long-time work, can make filter screen 601 guarantee normal work, improved filtration efficiency, and then improved work efficiency. Through setting up sand grip 18 and spout 19 to under spout 19's effect, the cooperation that can be better is collected frame 8 and is ground moved, and plays spacing effect for the removal of collecting frame 8, and then guarantees to collect the stability of frame 8 operation.
In one embodiment, for the above vehicle body 1, a supporting frame 13 is disposed on the other side of the top end of the vehicle body 1, a water tank 14 is disposed on the top of the supporting frame 13, a water pump 15 is kept connected with the water tank 14 through a pipeline, a water pipe 16 is disposed on one side of the water pump 15, the water pipe 16 is of a T-shaped structure, and atomizing nozzles 17 are disposed at both ends of the water pipe, so that water inside the water tank 14 can be extracted for atomization, dust suppression and dust removal, and dust can be prevented from being raised to cause pollution.
In an embodiment, to the above-mentioned collection frame 8, the bilateral symmetry of collecting frame 8 is provided with sand grip 18, inside both sides wall bottom of dust removal case 5 all seted up with sand grip 18 matched with spout 19, and sand grip 18 is the isosceles trapezoid shape with spout 19 cross section, 2 top one sides of automobile body backplate are provided with control panel 20, make under the effect of spout 19, frame 8 ground movements are collected in cooperation that can be better, and play spacing effect for the removal of collecting frame 8, thereby guarantee to collect the stability of frame 8 operation.
In an embodiment, for the above-mentioned filter mechanism 6, the filter mechanism 6 includes the filter screen 601 that sets up inside dust removal case 5, both sides middle part on filter screen 601 top all is provided with riser 602, the inside of riser 602 is provided with pole setting 603, the top lateral wall of pole setting 603 runs through and is provided with disc 604, filter mechanism 6 is still including setting up the mounting panel 605 at the outside lateral wall of dust removal case 5, the top of mounting panel 605 is provided with motor 606, the one end of motor 606 output shaft just is located the inside of dust removal case 5 and is provided with round bar 607, and the tip at round bar 607 both ends is eccentric respectively to run through the lateral wall of disc 604 and pass through the bearing and be connected with the inner wall of dust removal case 5, for making can get rid of adsorbed impurity on the filter screen 601, thereby avoided filter screen 601 to adsorb some impurity after long-time work, can make filter screen 601 guarantee normal work, can not influence the filter effect of filter screen 601, and the while, still reduced the change and the maintenance of staff to filter screen 601, and then saved the manpower, and improved work efficiency.
In an embodiment, for above-mentioned riser 602, through-hole 6021 has been seted up to the lateral wall of riser 602, arc wall 6022 has all been seted up to top and bottom in through-hole 6021, the top lateral wall of pole setting 603 has been seted up and has been perforated 6031 with disc 604 matched with, the top and the bottom of pole setting 603 all set up to the arcwall face, and the arcwall face cooperatees with arc wall 6022 for can realize being connected between riser 602 and the pole setting 603, thereby can drive filter screen 601 and can carry out up-and-down reciprocating motion under the rotation of motor 606.
For the convenience of understanding the technical solution of the present invention, the following detailed description is made on the working principle or the operation mode of the present invention in the practical process.
In practical application, firstly, the device is pushed to a building site to be dedusted, then the water pump 16 is started through the control panel 20, water in the water tank 14 is sprayed out through the atomizing spray nozzle 17 through the water pump 16 to suppress and reduce dust, then the dust collector 10 is started, dust is sucked into the dedusting box 5 under the action of the dust hood and the dust suction pipe, then impurities in the dust are filtered under the action of the filtering mechanism 6, the filtered dust is discharged through the exhaust pipe, the filtered impurities fall into the collecting frame 8, and then a worker can take out the collecting frame 8 through the handle 9 under the action of the sliding groove 19 and the raised line 18 to treat the impurities;
the specific working principle of the filtering mechanism 6 is as follows: through control panel 20 starter motor 606, the round bar 607 who beats through the output shaft of motor 606 rotates to drive disc 604 and rotate, because the tip at round bar 607 both ends is eccentric respectively and runs through the lateral wall of disc 604, thereby can drive filter screen 601 and carry out up-and-down reciprocating motion under the cooperation of pole setting 603 and riser 602, and then can give the adsorbed impurity on the filter screen 601 and get rid of.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a prevent environmental protection dust collector for construction of jam, includes automobile body (1), and this automobile body (1) one side is provided with automobile body backplate (2), and this automobile body (1) four corners all is provided with removes wheel (3), and this automobile body backplate (2) one side top is provided with handle (4), its characterized in that:
automobile body (1) top one side is provided with dust removal case (5), the inside of dust removal case (5) is provided with filtering mechanism (6), the top of dust removal case (5) is provided with blast pipe (7), the bottom of filtering mechanism (6) just is located bottom is provided with collects frame (8) in dust removal case (5), the one end of collecting frame (8) is provided with handle (9), dust removal case (5) a lateral wall is provided with dust catcher (10), one side of dust catcher (10) is connected with dust absorption pipe (11), the tip of dust absorption pipe (11) runs through automobile body (1) is connected with suction hood (12).
2. The anti-clogging environment-friendly dust removal device for building construction as claimed in claim 1, wherein a support frame (13) is arranged on the other side of the top end of the vehicle body (1), a water tank (14) is arranged on the top of the support frame (13), a water pump (15) is kept connected with the water tank (14) through a pipeline, a water pipe (16) is arranged on one side of the water pump (15), the water pipe (16) is of a T-shaped structure, and atomizing nozzles (17) are arranged at two ends of the water pipe.
3. The anti-clogging environment-friendly dust removal device for building construction as claimed in claim 1, wherein raised lines (18) are symmetrically arranged on two sides of the collection frame (8), sliding grooves (19) matched with the raised lines (18) are formed in the bottoms of two inner side walls of the dust removal box (5), the cross sections of the raised lines (18) and the sliding grooves (19) are isosceles trapezoid-shaped, and a control panel (20) is arranged on one side of the top of the vehicle body backboard (2).
4. The anti-clogging environment-friendly dust removal device for building construction according to claim 1, wherein the filtering mechanism (6) comprises a filtering net (601) arranged inside the dust removal box (5), vertical plates (602) are arranged in the middle parts of two sides of the top end of the filtering net (601), vertical rods (603) are arranged inside the vertical plates (602), and a circular disc (604) penetrates through the side wall of the top of each vertical rod (603).
5. The anti-blocking environment-friendly dust removal device for building construction according to claim 4, wherein the filtering mechanism (6) further comprises a mounting plate (605) arranged on the outer side wall of the dust removal box (5), a motor (606) is arranged at the top end of the mounting plate (605), a round rod (607) is arranged at one end of an output shaft of the motor (606) and inside the dust removal box (5), and the ends of the two ends of the round rod (607) eccentrically penetrate through the side wall of the disc (604) and are connected with the inner wall of the dust removal box (5) through bearings.
6. The anti-clogging environment-friendly dust removal device for building construction as claimed in claim 4, wherein the side wall of the vertical plate (602) is provided with a through hole (6021), and the top end and the bottom end in the through hole (6021) are both provided with arc-shaped grooves (6022).
7. The anti-clogging environment-friendly dust removal device for building construction as claimed in claim 6, wherein the top side wall of the vertical rod (603) is provided with a through hole (6031) matched with the disc (604), the top end and the bottom end of the vertical rod (603) are both provided with arc-shaped surfaces, and the arc-shaped surfaces are matched with the arc-shaped grooves (6022).
CN202222236660.2U 2022-08-24 2022-08-24 Prevent environmental protection dust collector for construction of jam Active CN218077128U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222236660.2U CN218077128U (en) 2022-08-24 2022-08-24 Prevent environmental protection dust collector for construction of jam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222236660.2U CN218077128U (en) 2022-08-24 2022-08-24 Prevent environmental protection dust collector for construction of jam

Publications (1)

Publication Number Publication Date
CN218077128U true CN218077128U (en) 2022-12-20

Family

ID=84447757

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222236660.2U Active CN218077128U (en) 2022-08-24 2022-08-24 Prevent environmental protection dust collector for construction of jam

Country Status (1)

Country Link
CN (1) CN218077128U (en)

Similar Documents

Publication Publication Date Title
CN108465336A (en) A kind of town road brick cutting dust guard
CN112195849A (en) Road cleaning equipment for municipal works
CN112391983A (en) High-efficient dust collector is used in road construction
CN211006486U (en) Sweeping device with good sweeping effect on road corners
CN218077128U (en) Prevent environmental protection dust collector for construction of jam
CN210206191U (en) Environment-friendly construction dust collector
CN218492395U (en) Cleaning device for highway maintenance
CN218009527U (en) Miniature floor sweeping device for green construction of buildings
CN218148040U (en) Road cleaning device for municipal environmental engineering with dust collection function
CN218166398U (en) Dustproof device for construction technology of building engineering
CN215352656U (en) Efficient energy-saving dust-raising-preventing device for building construction
CN213253651U (en) Civil engineering is dust collector for job site
CN210251656U (en) Dust removal environmental protection equipment for sheet metal working
CN210151635U (en) Dust collecting equipment for building site
CN217312553U (en) A dust collector for construction
CN110898585A (en) Novel municipal administration sanitation dust remover
CN209612464U (en) A kind of interior decoration construction dust isolating device
CN218901316U (en) Environment-friendly dust removal equipment for building engineering construction
CN112263889A (en) Multifunctional biological boiler flue gas particulate matter purifying device
CN217163750U (en) Dust collecting equipment for coal mine production
CN216498297U (en) Environmental protection dust collector of building engineering construction
CN214271860U (en) Road cleaning equipment for municipal works
CN219050794U (en) Environment-friendly dust removal cabinet
CN214415964U (en) Dust reduction device for building foundation construction
CN217725044U (en) Environment-friendly polishing dust collecting equipment

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant