CN112357375B - Metal powder vacuum collection device - Google Patents

Metal powder vacuum collection device Download PDF

Info

Publication number
CN112357375B
CN112357375B CN202011283797.2A CN202011283797A CN112357375B CN 112357375 B CN112357375 B CN 112357375B CN 202011283797 A CN202011283797 A CN 202011283797A CN 112357375 B CN112357375 B CN 112357375B
Authority
CN
China
Prior art keywords
neck
tank
opening
top cover
outer pipe
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
CN202011283797.2A
Other languages
Chinese (zh)
Other versions
CN112357375A (en
Inventor
蒋保林
张柯
许荣玉
叶国晨
唐跃跃
魏放
赵银忠
李兆宽
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.)
Jiangsu Vilory Advanced Materials Technology Co Ltd
Original Assignee
Jiangsu Vilory Advanced Materials Technology 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 Jiangsu Vilory Advanced Materials Technology Co Ltd filed Critical Jiangsu Vilory Advanced Materials Technology Co Ltd
Priority to CN202011283797.2A priority Critical patent/CN112357375B/en
Publication of CN112357375A publication Critical patent/CN112357375A/en
Application granted granted Critical
Publication of CN112357375B publication Critical patent/CN112357375B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/16—Large containers flexible
    • B65D88/1612—Flexible intermediate bulk containers [FIBC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/26—Hoppers, i.e. containers having funnel-shaped discharge sections
    • B65D88/28—Construction or shape of discharge section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/54—Large containers characterised by means facilitating filling or emptying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers

Abstract

The invention discloses a metal powder vacuum collection device, which comprises a collection tank, a collection bag and a joint component, wherein the collection tank is made of metal and used for receiving metal powder; the collecting tank comprises a tank neck, a tank body and an exhaust hole; the collecting bag is a soft bag; the joint assembly comprises an outer pipe, a pressing ring, a blanking cone and an inner pipe. Through designing into tubular metal resonator and soft jar with the collection tank, when can realizing that the evacuation keeps the atmosphere condition, reduce the requirement to jar body intensity, convenient and fast's collection metal powder is convenient for subsequent storage and transportation.

Description

Metal powder vacuum collection device
Technical Field
The invention relates to a tank assembly for collecting metal powder in the process of producing the metal powder by gas atomization.
Background
The existing metal powder collecting device is usually a very heavy metal can. The collection, the dumping and the carrying are very troublesome.
Disclosure of Invention
The embodiment of the application provides a subassembly is collected in metal powder vacuum, has solved the collection tank overweight among the prior art, the inconvenient problem of evacuation.
The embodiment of the application provides a metal powder vacuum collection device, which comprises a collection tank, wherein the collection tank is made of metal and is used for receiving metal powder,
also includes a collection bag and a connector assembly;
the collecting tank comprises a tank neck, a tank body and an exhaust hole;
the tank neck is used for being communicated with the joint assembly to form a blanking channel;
the tank neck is coaxially and fixedly communicated with the tank body;
the collecting bag is a soft bag and is divided into two layers, wherein the inner layer is a heat-resistant layer, and the outer layer is a sealing layer;
the inner layer is used for directly contacting metal powder and is made of heat-resistant cloth;
the outer layer is used for keeping a sealing state after vacuumizing and is made of one of plastic, resin and rubber;
the inner layer and the outer layer are integrated by gluing, coating or hot-press bonding;
the collecting bag comprises a bag body, a neck, a top cover and a one-way valve;
the shape of the bag body is the same as that of the inner wall of the tank body of the collecting tank, but is not smaller than the size of the inner wall of the collecting tank;
the axial length of the diameter opening is the same as that of the tank neck, but the outer diameter of the diameter opening is larger than the inner diameter of the tank neck and is 1.5-1.9 times of the inner diameter of the tank neck;
the diameter opening is coaxially and fixedly communicated with the bag body;
the top cover is made of rubber and is used for sealing the neck opening, the top cover is also used for sealing the top opening of the can neck, and the outer diameter of the top cover is larger than the inner diameter of the top opening of the can neck; the top cover can be provided with threads or a buckling device which is detachably and fixedly connected with the opening at the top end of the can neck;
the side wall of the can neck is provided with an opening, the neck opening is fixedly communicated with a one-way valve, and the one-way valve extends out of the opening of the side wall of the can neck;
the top end face of the tank neck is provided with a coaxial annular groove, and the top cover is provided with an annular sealing ring which can extend into the annular groove;
the joint assembly comprises an outer pipe, a pressing ring, a blanking cone and an inner pipe;
the outer pipe is used for being detachably, hermetically and fixedly connected with the tank neck;
the pressing ring is positioned in the outer pipe and is coaxial with the outer pipe, the pressing ring protrudes out of the outer pipe, and the bottom surface of the pressing ring can apply downward axial pressure to the top surface of the top cover when the outer pipe moves downward axially; the top cover and the top surface of the can neck can be tightly pressed, and the sealing ring and the annular groove are sealed;
the blanking cone is in a circular shape of a circular truncated cone, is coaxial with the outer pipe and is fixed in the outer pipe;
the inner pipe is coaxially and fixedly communicated with the blanking cone; the bottom opening of the inner tube is obliquely arranged, the included angle between the oblique angle of the bottom opening and the acute angle of the axial plane is 40-65 degrees, and the bottom opening is edged for puncturing the top cover;
furthermore, the joint component also comprises a sleeve and a fixing part;
the bottom of the sleeve is positioned in the outer pipe and is in sliding sealing connection with the inner wall of the outer pipe, and the top of the blanking cone is fixedly communicated with the sleeve; the fixed part is fixed on the outer wall of the sleeve and comprises an outward convex flange and a threaded sleeve, and the threaded sleeve can be in threaded sealing connection with the outer wall of the top of the outer pipe.
Further, the collecting tank is formed by hinging two symmetrical structures.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: through designing into tubular metal resonator and soft jar with the collection tank, when can realizing that the evacuation keeps the atmosphere condition, reduce the requirement to jar body intensity, convenient and fast's collection metal powder is convenient for subsequent storage and transportation.
Drawings
FIG. 1 is a schematic view of a collection tank;
FIG. 2 is a schematic view of a collection bag in a vacuum state;
fig. 3 is a schematic view of the open state of the catchment tank.
In the figure, a collection tank 100, a tank neck 110, a vent 120, a collection bag 200, a bag body 210, a neck opening 220, a top cover 230, a one-way valve 240, a joint component 300, an outer pipe 310, a pressing ring 320, a blanking cone 330 and an inner pipe 340
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The collection of the powder is only collected by a metal can body, and is formed by combining a collection can 100 made of metal and a soft collection bag 200. The collection bag 200 is first evacuated and the collection bag 200 is gradually filled with powder and gas during powder collection. After the powder collecting bag is filled with the powder, the collecting bag 200 can be quickly conveyed and stored after being taken out of the collecting tank 100, the tank body does not need to be repeatedly carried, or the tank body is cleaned, vacuumized and the like, so that the powder can be collected more conveniently.
Example one
A metal powder vacuum collection device comprises a collection tank 100, wherein the collection tank 100 is made of metal and used for containing metal powder;
further comprising a collection bag 200 and a connector assembly 300;
the collection tank 100 comprises a tank neck 110, a tank body 120 and a vent hole 120;
the tank neck 110 is used for communicating with the joint assembly 300 to form a blanking channel;
the tank neck 110 is coaxially and fixedly communicated with the tank body 120;
the collecting bag 200 is a soft bag and is divided into two layers, wherein the inner layer is a heat-resistant layer, and the outer layer is a sealing layer;
the inner layer is used for directly contacting the metal powder and can be made of heat-resistant cloth;
the outer layer is used for keeping a sealing state after vacuum pumping, can be made of airtight materials such as plastics, resin, rubber and the like, and is convenient to seal;
the inner layer and the outer layer can be bonded into a whole, and can also be coated or bonded into a whole by hot pressing;
the collection bag 200 comprises a bag body 210, a neck 220, a top cover 230, a one-way valve 240;
the shape of the bag body 210 is the same as that of the inner wall of the tank body 120 of the collecting tank 100, but is not smaller than the size of the inner wall of the collecting tank 120;
the axial length of the diameter opening 220 is the same as that of the tank neck 110, but the outer diameter of the diameter opening 220 is larger than the inner diameter of the tank neck 110 and is 1.5 to 1.9 times of the inner diameter of the tank neck 110;
the caliber 220 is coaxially and fixedly communicated with the bag body 210;
the top cover 230 is made of rubber and is used for sealing the neck opening 220, the top cover 230 is also used for sealing the top end opening of the can neck 110, and the outer diameter of the top cover 230 is larger than the inner diameter of the top end opening of the can neck 110; the top cover 230 can be provided with threads or a fastening device to be detachably and fixedly connected with the top opening of the can neck 110;
the side wall of the can neck 110 is provided with an opening, the neck opening 220 is fixedly communicated with a one-way valve 240, and the one-way valve 240 extends out of the opening on the side wall of the can neck 110;
the top end face of the tank neck 110 is provided with a coaxial annular groove, and the top cover 230 is provided with an annular sealing ring which can extend into the annular groove;
the joint assembly 300 comprises an outer pipe 310, a pressing ring 320, a blanking cone 330 and an inner pipe 340;
the outer pipe 310 is used for being detachably, hermetically and fixedly connected with the tank neck 110;
the pressing ring 320 is positioned in the outer tube 310 and coaxial with the outer tube 310, the pressing ring 320 protrudes into the outer tube 310, and the bottom surface of the pressing ring 320 can apply an axially downward pressure to the top surface of the top cover 230 when the outer tube 310 moves axially downward; the top cover and the top surface of the can neck can be tightly pressed, and the sealing ring and the annular groove are sealed;
the blanking cone 330 is circular in shape of a circular truncated cone, is coaxial with the outer tube, and is fixed in the outer tube 310;
the inner pipe 340 is coaxially and fixedly communicated with the blanking cone 330; the bottom opening of the inner tube 340 is obliquely arranged, the included angle between the inclination angle of the bottom opening and the acute angle of the axial plane is 40-65 degrees, and a bottom opening edge is used for puncturing the top cover 230;
when in use, the collection bag 200 is first evacuated through the one-way valve 240, and the top cover 230 is secured to the top surface of the can neck 110 with the gasket captured in the annular groove. Then fixedly connecting the neck 110 of the collection tank 100 with the outer pipe 310 of the joint assembly 300, and enabling the pressing ring 310 to press the top cover 220 on the fixed edge of the neck 110; of course, the top cover 230 itself may be removably secured to the neck finish. The sleeve is then slid so that the bottom end of the inner tube 340 pierces the top cap 230. This allows the bag to be emptied. After the blowing, jar body can design into the jar that can open, takes out the sack, also can not open, and the transport of the direct intercommunication jar body, nevertheless the jar body need not the evacuation operation this moment, need not bear too big intensity, so weight can be very light.
Example two
The top cap 230 may be unstable in attachment to the top pipe opening of the tank neck 110, and therefore, the joint assembly 300 further includes a sleeve 350, a fixing portion 360;
the bottom of the sleeve 350 is connected with the inner wall of the outer pipe 310 in a sliding and sealing manner, and the top of the blanking cone 330 is fixedly communicated with the sleeve 350; the fixing portion 360 is fixed on the outer wall of the sleeve 350 and comprises an outwardly protruding flange and a threaded sleeve, and the threaded sleeve can be in threaded sealing connection with the outer wall of the top of the outer pipe.
Thus, the inner tube can move out of step as the compression ring compresses the cap 230, and after compressing the cap, the inner tube 340 is manually pressed to pierce the cap 230 by pressing the upper tube 350. The top end of the sleeve 350 is now used to communicate with the feed forehead channel.
EXAMPLE III
The collection tank 100 may be a hinged assembly of two symmetrical structures, as shown in fig. 3. After the metal powder is collected, the top cover is sealed again (a sealing cover is added or a plastic film is directly covered and the like) and then the vacuum pumping is carried out through the one-way valve 240, the collecting tank 100 is opened, and the powder is communicated with the collecting bag 200 and taken out. The transportation and the storage are convenient.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A metal powder vacuum collection method comprises a collection tank made of metal and used for receiving metal powder, and is characterized in that,
also comprises a collecting bag and a joint component;
the collecting tank comprises a tank neck, a tank body and an exhaust hole;
the tank neck is used for being communicated with the joint assembly to form a blanking channel;
the tank neck is coaxially and fixedly communicated with the tank body;
the collecting bag is a soft bag and is divided into two layers, wherein the inner layer is a heat-resistant layer, and the outer layer is a sealing layer;
the inner layer is used for directly contacting metal powder and is made of heat-resistant cloth;
the outer layer is used for keeping a sealing state after vacuumizing and is made of resin;
the inner layer and the outer layer are bonded into a whole through gluing or hot-pressing;
the collecting bag comprises a bag body, a neck opening, a top cover and a one-way valve;
the shape of the bag body is the same as that of the inner wall of the tank body of the collecting tank, but is not smaller than the size of the inner wall of the collecting tank;
the axial length of the neck opening is the same as that of the can neck, but the outer diameter of the neck opening is larger than the inner diameter of the can neck and is 1.5-1.9 times of the inner diameter of the can neck;
the neck opening is coaxially and fixedly communicated with the bag body;
the top cover is made of rubber and is used for sealing the neck opening, the top cover is also used for sealing the opening at the top end of the can neck, and the outer diameter of the top cover is larger than the inner diameter of the opening at the top end of the can neck; the top cover can be provided with threads or a buckling device which is detachably and fixedly connected with the opening at the top end of the can neck;
the side wall of the can neck is provided with an opening, the neck opening is fixedly communicated with a one-way valve, and the one-way valve extends out of the opening of the side wall of the can neck;
the top end face of the tank neck is provided with a coaxial annular groove, and the top cover is provided with an annular sealing ring which can extend into the annular groove;
the joint assembly comprises an outer pipe, a pressing ring, a blanking cone and an inner pipe;
the outer pipe is used for being detachably, hermetically and fixedly connected with the tank neck;
the pressing ring is positioned in the outer pipe and is coaxial with the outer pipe, the pressing ring protrudes into the outer pipe, and the bottom surface of the pressing ring can apply axial downward pressure to the top surface of the top cover when the outer pipe moves axially downward; the top cover and the top end face of the tank neck can be tightly pressed, and the sealing ring and the annular groove are sealed;
the blanking cone is in a circular shape of a circular truncated cone, is coaxial with the outer pipe and is fixed in the outer pipe;
the inner pipe is coaxially and fixedly communicated with the blanking cone; the bottom opening of the inner tube is obliquely arranged, the included angle between the oblique angle of the bottom opening and the acute angle of the axial plane is 40-65 degrees, and the bottom opening is edged for puncturing the top cover;
fixing the top cover on the top end face of the tank neck, clamping the sealing ring into the annular groove, and vacuumizing the collection bag through the one-way valve;
then fixedly connecting the tank neck of the collecting tank with the outer pipe of the joint assembly, and enabling the pressing ring to tightly press the top cover on the top end face of the tank neck;
then the bottom end of the inner tube pierces the top cover, and the collection bag is filled with materials;
the joint component also comprises a sleeve and a fixing part;
the bottom of the sleeve is positioned in the outer pipe and is in sliding sealing connection with the inner wall of the outer pipe, and the top of the blanking cone is fixedly communicated with the sleeve; the fixing part is fixed on the outer wall of the sleeve and comprises an outward convex flange and a threaded sleeve, and the threaded sleeve can be in threaded sealing connection with the outer wall of the top of the outer pipe;
the collecting tank is formed by hinging two symmetrical structures.
CN202011283797.2A 2020-11-17 2020-11-17 Metal powder vacuum collection device Active CN112357375B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011283797.2A CN112357375B (en) 2020-11-17 2020-11-17 Metal powder vacuum collection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011283797.2A CN112357375B (en) 2020-11-17 2020-11-17 Metal powder vacuum collection device

Publications (2)

Publication Number Publication Date
CN112357375A CN112357375A (en) 2021-02-12
CN112357375B true CN112357375B (en) 2022-07-26

Family

ID=74515075

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011283797.2A Active CN112357375B (en) 2020-11-17 2020-11-17 Metal powder vacuum collection device

Country Status (1)

Country Link
CN (1) CN112357375B (en)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH547738A (en) * 1972-02-10 1974-04-11 Weber Alwin INSERTABLE POURER FOR THIN-WALLED AND PUNCHABLE BAGS AND CONTAINERS FOR POWDER-FABRIC PRODUCTS OR LIQUIDS, MADE OF NON-METALLIC MATERIALS.
US4182386A (en) * 1977-11-30 1980-01-08 Semi-Bulk Systems, Inc. Closed system and container for dust free loading and unloading of powdered materials
DE3016922A1 (en) * 1980-05-02 1981-11-05 Kutterer, Franz, 7500 Karlsruhe TUBE WITH SCREW CAP
JP4333972B2 (en) * 1998-11-27 2009-09-16 大日本印刷株式会社 Bag-in-box filling port
JP3875523B2 (en) * 2001-07-19 2007-01-31 住友ゴム工業株式会社 Puncture sealant container and puncture repair system using the same
JP3813550B2 (en) * 2002-07-09 2006-08-23 有限会社ミナミスポーツ企画 Liquid storage container
CN101318585B (en) * 2007-11-06 2011-06-15 张怀宇 Combined barrelled water bucket
JP5707118B2 (en) * 2010-12-09 2015-04-22 藤森工業株式会社 Container for filling
JP6159226B2 (en) * 2013-10-30 2017-07-05 信越ポリマー株式会社 Injection container
CN204021529U (en) * 2014-07-30 2014-12-17 吴海洋 Water butt inner bag and water butt
IT201700120600A1 (en) * 2017-10-24 2019-04-24 Guala Pack Spa FILLING METHOD OF A THIN PACKAGED UNIT WITH CANNUCCIA
DE102018003887A1 (en) * 2018-05-15 2019-11-21 Linde Aktiengesellschaft Vacuum packaging for the storage of powder materials
CN211253656U (en) * 2019-10-29 2020-08-14 天津珂芬迪斯生物医药科技有限公司 Double-layer vacuum container

Also Published As

Publication number Publication date
CN112357375A (en) 2021-02-12

Similar Documents

Publication Publication Date Title
EP1020371A3 (en) Vacuum airtight container
CN109996735A (en) Head closed type bucket with lining and the method for producing it
CN206218460U (en) Hydrocone type Dewar bottle
CN112357375B (en) Metal powder vacuum collection device
JPH0649159B2 (en) Shirred cap assembly for centrifuge tubes
JPH04506649A (en) cap for container
CN107651318A (en) Cup lid is vacuumized, vacuumize cup and vacuumizes stirring/crushing cup
CN207536495U (en) Cup lid is vacuumized, vacuumize cup and vacuumizes stirring/crushing cup
CN110786695B (en) Double-opening vacuum cup and manufacturing method thereof
JP2000005729A (en) Nozzle for pet bottle compression
CN212448757U (en) Biochemical reagent bottle lid
CN211253656U (en) Double-layer vacuum container
CN209553894U (en) A kind of direct press type ring cutting bottle cap box
US5228274A (en) Sealing apparatus for metal lid canning jars
CN208626490U (en) A kind of small spray orifice extinguishing device
CN209650898U (en) A kind of pump assembly and the container with content discharge function
CN217402032U (en) Vacuumizing joint assembly of ethylene oxide condensation recovery device
CN212980776U (en) Portable cosmetic packaging bottle
CN101161561A (en) Vacuum pop can box
CN209815184U (en) Cup cylinder adsorption device of cup stacking robot
CN206665357U (en) A kind of Novel Dual packs male valve
WO2020193503A1 (en) Recyclable aerosol can with depressurisation system and tool for depressurising such a can
CN206750586U (en) A kind of binary package female valve gear and Double-component packing pot
CN213842740U (en) Vacuum sampler for packaging adhesive
CN209834533U (en) Pressure-resistant aerosol can

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant