CN206439540U - A kind of flange arrangement of pipeline connection - Google Patents

A kind of flange arrangement of pipeline connection Download PDF

Info

Publication number
CN206439540U
CN206439540U CN201720006342.3U CN201720006342U CN206439540U CN 206439540 U CN206439540 U CN 206439540U CN 201720006342 U CN201720006342 U CN 201720006342U CN 206439540 U CN206439540 U CN 206439540U
Authority
CN
China
Prior art keywords
flange
fixed part
pipeline
engaged
locating
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
CN201720006342.3U
Other languages
Chinese (zh)
Inventor
宋根霞
王志琳
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.)
Hangzhou Jang Yu Stainless Steel Co Ltd
Original Assignee
Hangzhou Jang Yu Stainless Steel 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 Hangzhou Jang Yu Stainless Steel Co Ltd filed Critical Hangzhou Jang Yu Stainless Steel Co Ltd
Priority to CN201720006342.3U priority Critical patent/CN206439540U/en
Application granted granted Critical
Publication of CN206439540U publication Critical patent/CN206439540U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Joints With Sleeves (AREA)

Abstract

The utility model discloses a kind of flange arrangement of pipeline connection, including first flange disk and second flange disk, first flange Pan Neiceweizhichu is provided with first connecting portion, second flange Pan Neiceweizhichu is provided with the second connecting portion being engaged with first connecting portion, first flange Pan Waiceweizhichu is provided with the first fixed part, second flange Pan Waiceweizhichu is provided with the second fixed part, the first pipeline is combined with first fixed part, second pipe is combined with second fixed part, screw thread is combined with the first nut on first fixed part, screw thread is combined with the second nut on second fixed part, first pipeline is provided with externally threaded first fixed cover of band being engaged with the first nut, second pipe is provided with externally threaded second fixed cover of band being engaged with the second nut, first pipeline is provided with the first fixation kit, second pipe is provided with the second fixation kit.Pipeline is easy to connect, and connective stability is high, fixed, will not rotate and release phenomenon, and sealing is high.

Description

A kind of flange arrangement of pipeline connection
Technical field
The utility model is related to a kind of flange arrangement of pipeline connection.
Background technology
The medium of conveying is mostly the fluids such as liquid or gas in pipeline, and two pipeline enclosures need to seal consolidation connection, existing Pipeline connection would generally using flange connection by the way of, but at present flange connect structure in, flange is connected peace with pipeline Dress is more wasted time and energy with safeguarding, and sealing is bad, easily occurs the phenomenon leaked after prolonged.
The content of the invention
The technical problems to be solved in the utility model is to provide a kind of simple in construction, easy to use, simple to operate, pipeline company Connect conveniently, connective stability is high, cost is low, install and convenient disassembly, it is fixed, phenomenon will not be rotated and release, it is close Feng Xinggao, applied widely, service life is long, the flange arrangement of the pipeline connection with safe and reliable effect.
To solve the above problems, the utility model is adopted the following technical scheme that:
In a kind of flange arrangement of pipeline connection, including first flange disk and second flange disk, the first flange disk First connecting portion is provided with side position, the second flange Pan Neiceweizhichu is provided with the be engaged with the first connecting portion Two connecting portions, the first flange Pan Waiceweizhichu is provided with the first fixed part, and the second flange Pan Waiceweizhichu is provided with It is combined with second fixed part, first fixed part on the first pipeline, second fixed part and is combined with second pipe, it is described First fixed part is provided with the first neck being engaged with first pipeline, and second fixed part is provided with and described second Screw thread is combined with screw thread on the first nut, second fixed part on the second neck that pipeline is engaged, first fixed part The second nut is combined with, first pipeline is provided with externally threaded first fixed cover of band being engaged with first nut, The second pipe is provided with externally threaded second fixed cover of band being engaged with second nut, first pipeline and set There is the first fixation kit, the second pipe is provided with the second fixation kit, the first flange disk, which is provided with, is used to fixing the The fixing bolt of one ring flange and second flange disk, the first connecting portion is with being provided with sealing ring at second connecting portion cooperation.
As preferred technical scheme, the first neck inwall is provided with the first sealing being engaged with first pipeline Pad, the second neck inwall is provided with position on the outside of the second sealing gasket being engaged with the second pipe, first fixed cover Place is put to be provided with circular the first limiting plate set, be provided with the second fixed cover outer fix in it is circular set the Two limiting plates, the second flange disk is provided with locating rod, and the first flange disk is provided with what is be engaged with the locating rod Locating slot, the locating slot inwall is with being provided with rubber ring at locating rod cooperation.
As preferred technical scheme, first fixation kit is made up of the first locating ring and the second locating ring, described First locating ring is provided with the first installing plate, and second locating ring is provided with the second peace being engaged with first installing plate Fill plate, first installing plate, which is provided with, is used to fixing the first installation bolt of the first installing plate and the second installing plate, described the The first otic placode is equipped with one locating ring and the second locating ring, first otic placode, which is provided with, to be used to fix the first otic placode and first The first spring, first spring one end and first are arranged with first bolt of ring flange, first bolt Otic placode offsets, and the other end offsets with first flange disk, and first locating ring and the second locating ring and the first pipeline outer wall coordinate The side on be equipped with the first flexible gasket.
As preferred technical scheme, second fixation kit is made up of the 3rd locating ring and the 4th locating ring, described 3rd locating ring is provided with the 3rd installing plate, and the 4th locating ring is provided with the 4th peace being engaged with the 3rd installing plate Fill plate, the 3rd installing plate, which is provided with, is used to fixing the second installation bolt of the 3rd installing plate and the 4th installing plate, described the The second otic placode is equipped with three locating rings and the 4th locating ring, second otic placode, which is provided with, to be used to fix the second otic placode and second Second bolt of ring flange, second bolt is provided with second spring, described second spring one end and the second ear Plate offsets, and the other end offsets with second flange disk, and the 3rd locating ring and the 4th locating ring coordinate with second pipe outer wall The second flexible gasket is equipped with the side.
As preferred technical scheme, the fixing bolt is provided with four, the first connecting portion, first flange disk and the One fixed part is integral by the way of once-cast, and the second connecting portion, second flange disk and the second fixed part are used The mode of once-cast is integral.
As preferred technical scheme, first fixed cover and the first fixed part coordinate, first fixed cover and the The first sealing ring is provided with one fixed part cooperation, second fixed cover and the second fixed part coordinate, second fixed cover with The second sealing ring is provided with second fixed part cooperation.
As preferred technical scheme, first bolt is provided with two, and first otic placode is weldingly fixed on the On one fixation kit.
As preferred technical scheme, second bolt is provided with two, and second otic placode is weldingly fixed on the On two fixation kits.
A kind of beneficial effect of the flange arrangement of pipeline connection of the utility model is:It is simple in construction, easy to use, operation Simply, pipeline is easy to connect, and connective stability is high, and cost is low, installs and convenient disassembly, fixed, will not rotate and Phenomenon is released, sealing is high, and applied widely, service life is long, with safe and reliable effect.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the flange arrangement of pipeline connection of the utility model;
Fig. 2 is a kind of front view of the flange arrangement of pipeline connection of the utility model;
Fig. 3 is a kind of A portions enlarged drawing of the flange arrangement of pipeline connection of the utility model;
Fig. 4 is a kind of B portions enlarged drawing of the flange arrangement of pipeline connection of the utility model.
Embodiment
Refering to a kind of flange arrangement of pipeline connection shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, including the He of first flange disk 1 First connecting portion 3, the inner side of second flange disk 2 are provided with second flange disk 2, the inner side of first flange disk 1 Place, which is provided with the second connecting portion 4 being engaged with the first connecting portion 3, the outer fix of first flange disk 1, is provided with first It is provided with fixed part 5, the outer fix of second flange disk 2 on second fixed part 6, first fixed part 5 and is combined with first Second pipe 8 is combined with pipeline 7, second fixed part 6, first fixed part 5 is provided with and the phase of the first pipeline 7 The first neck 9 coordinated, second fixed part 6 is provided with the second neck 10 for being engaged with the second pipe 8, and described the Screw thread is combined with screw thread on the first nut 11, second fixed part 6 and is combined with the second nut 12, described on one fixed part 5 One pipeline 7 is provided with externally threaded first fixed cover 13 of band being engaged with first nut 11, the second pipe 8 and set There is externally threaded second fixed cover 14 of the band being engaged with second nut 12, first pipeline 7 is fixed provided with first Component 15, the second pipe 8 is provided with the second fixation kit 16, and the first flange disk 1, which is provided with, to be used to fix the first method The fixing bolt 17 of blue disk 1 and second flange disk 2, the first connecting portion 3 is with being provided with sealing ring at the cooperation of second connecting portion 4 18。
A preferred embodiment in the utility model, the inwall of the first neck 9 is provided with to match with first pipeline 7 The first sealing gasket 19 closed, the inwall of the second neck 10, which is provided with the second sealing gasket being engaged with the second pipe 8, (does not scheme Show), it is provided with the outer fix of the first fixed cover 13 in circular the first limiting plate 20 set, second fixed cover 14 It is provided with outer fix in circular the second limiting plate 21 set, the second flange disk 2 is provided with locating rod 22, described the One ring flange 1 is provided with the locating slot 23 being engaged with the locating rod 22, and the inwall of locating slot 23 coordinates with locating rod 22 Place is provided with rubber ring 24.
A preferred embodiment in the utility model, first fixation kit 15 is determined by the first locating ring 25 and second Position ring 26 is constituted, and first locating ring 25 is provided with the first installing plate 27, and second locating ring 26 is provided with and described the The second installing plate 28 that one installing plate 27 is engaged, first installing plate 27, which is provided with, to be used to fix the first installing plate 27 and the The first otic placode 30 is equipped with first installation bolt 29 of two installing plates 28, the locating ring 26 of the first locating ring 25 and second, First otic placode 30 is provided with the first bolt 31 for being used for fixing the first otic placode 30 and first flange disk 1, described first The first spring 32 is arranged with bolt 31, described one end of first spring 32 offsets with the first otic placode 30, the other end and first Ring flange 1 offsets, and is equipped with the side that the locating ring 26 of the first locating ring 25 and second coordinates with the outer wall of the first pipeline 7 First flexible gasket 33.
A preferred embodiment in the utility model, second fixation kit 16 is determined by the 3rd locating ring 41 and the 4th Position ring 42 is constituted, and the 3rd locating ring 41 is provided with the 3rd installing plate 43, and the 4th locating ring 42 is provided with and described the The 4th installing plate that three installing plates 44 are engaged, the 3rd installing plate 43, which is provided with, to be used to fix the 3rd installing plate 43 and the 4th The second otic placode 46 is equipped with second installation bolt 45 of installing plate 44, the 3rd locating ring 41 and the 4th locating ring 42, institute State the second otic placode 46 and be provided with the second bolt 47 for being used for fixing the second otic placode 46 and second flange disk 2, described second determines Position bolt 47 is provided with second spring 48, and described one end of second spring 48 offsets with the second otic placode 46, the other end and second flange Disk 2 is offseted, and second is equipped with the side that the 3rd locating ring 41 and the 4th locating ring 42 coordinate with the outer wall of second pipe 8 Flexible gasket 110.
A preferred embodiment in the utility model, the fixing bolt 17 be provided with four, the first connecting portion 3, The fixed part 5 of first flange disk 1 and first is integral by the way of once-cast, the second connecting portion 4, second flange disk 2 and second fixed part 6 it is integral by the way of once-cast.
A preferred embodiment in the utility model, first fixed cover 13 coordinates with the first fixed part 5, and described The first sealing ring 51 is provided with one fixed cover 13 and the cooperation of the first fixed part 5, the fixed part 6 of the second fixed cover 14 and second is matched somebody with somebody Close, the second sealing ring 52 is provided with the cooperation of 14 and second fixed part of the second fixed cover 6.
A preferred embodiment in the utility model, first bolt 31 is provided with two, first otic placode 30 are weldingly fixed on the first fixation kit 15.
A preferred embodiment in the utility model, second bolt 47 is provided with two, second otic placode 46 are weldingly fixed on the second fixation kit 16.
Further, the first neck inwall is provided with the first sealing gasket for being engaged with first pipeline, and described the Two draw-in groove inwall is provided with to be provided with the second sealing gasket being engaged with the second pipe, the first fixed cover outer fix It is provided with the first limiting plate that annular shape is set, the second fixed cover outer fix in circular the second limiting plate set, The second flange disk is provided with locating rod, and the first flange disk is provided with the locating slot being engaged with the locating rod, institute Locating slot inwall is stated with being provided with rubber ring at locating rod cooperation, by set the first sealing gasket and the second sealing gasket, is added Sealing when sealing and second pipe and the second neck when the first pipeline and the cooperation of the first neck coordinate, by set The first limiting plate and the second limiting plate, the first nut can be avoided to coordinate and the second nut and the fixing external threading with first There is screw thread and coordinate the situations of the excess of stroke to occur and influence the first pipeline and the first fixed part and the in two fixation external threadings when coordinating The bonding strength of two pipelines and the second fixed part, is equipped with by set locating rod and locating slot, can avoid first flange Disk and second flange disk produce circumferential revolving force and influence first flange disk and second flange disk after being fixed by fixing bolt Bonding strength.
Further, first fixed cover and the first fixed part coordinate, and first fixed cover is matched somebody with somebody with the first fixed part The first sealing ring is provided with conjunction, second fixed cover and the second fixed part coordinate, second fixed cover and the second fixed part The second sealing ring is provided with cooperation, by set the first sealing ring and the second sealing ring, the first fixed cover is added with the Sealing property when one fixed part and the cooperation of the second fixed cover and the second fixed part.
A kind of flange arrangement of pipeline connection of the utility model has advantages below:In use, by first pipeline one end It is inserted into the first fixed part, and coordinates with the first neck for being arranged in the first fixed part, second pipe is inserted into second In fixed part, and coordinate with the second neck for being arranged in the second fixed part, now by rotating the first nut and the second nut, So that the first nut and the first fixed cover coordinate, the second nut and the cooperation of the second fixed cover so that reached fix the first pipeline, The purpose of flange and second pipe, is coordinated and the by the first set fixation kit, the first otic placode and the first bolt Two fixation kits, the second otic placode and the second bolt coordinate, and add the first pipeline and second pipe when being connected with flange Bonding strength, it is to avoid coming off occur in the first pipeline and second pipe or the phenomenon that rotates occurs, and pass through set first and connect Socket part and second connecting portion coordinate, and on first flange disk are provided for fixing the fixation of first flange disk and second flange disk Bolt, add the bonding strength of first flange disk and second flange disk, and facilitates this flange arrangement in connecting pipe Installation and removal, by the first neck inwall set the first sealing gasket, the second neck inwall set the second sealing gasket and Sealing ring is provided with first connecting portion and second connecting portion cooperation, the sealing that the first pipeline and the first fixed part coordinate is added Property, the sealing that second pipe and the second fixed part coordinate, and the sealing that first connecting portion and second connecting portion coordinate, from And leakage phenomenon occurs when avoiding the occurrence of pumped (conveying) medium, and pass through the first set spring and second spring so that the first otic placode Fixed with first flange disk by the first bolt and the second otic placode and second flange disk are by the second bolt The stress concentration problem produced when being fixed and situation about expanding with heat and contract with cold occur, and add this flange arrangement in connection Scalability.Its is simple in construction, easy to use, simple to operate, and pipeline is easy to connect, and connective stability is high, and cost is low, installs And convenient disassembly, it is fixed, phenomenon will not be rotated and release, sealing is high, and applied widely, service life is long, tool Play the role of safe and reliable.
It is described above, embodiment only of the present utility model, but protection domain of the present utility model do not limit to In this, any change or replacement expected without creative work should all be covered within protection domain of the present utility model. Therefore, protection domain of the present utility model should be determined by the scope of protection defined in the claims.

Claims (8)

1. a kind of flange arrangement of pipeline connection, it is characterised in that:Including first flange disk and second flange disk, described first First connecting portion is provided with ring flange inner side, the second flange Pan Neiceweizhichu is provided with and the first connecting portion phase The second connecting portion of cooperation, the first flange Pan Waiceweizhichu is provided with position on the outside of the first fixed part, the second flange disk Put to locate to be provided with to be combined with the first pipeline, second fixed part on the second fixed part, first fixed part and be combined with second Pipeline, first fixed part is provided with the first neck being engaged with first pipeline, and second fixed part is provided with Screw thread is combined with the first nut on the second neck being engaged with the second pipe, first fixed part, and described second consolidates Determine screw thread in portion and be combined with the second nut, first pipeline is provided with the band being engaged with first nut externally threaded the One fixed cover, the second pipe is provided with externally threaded second fixed cover of band that is engaged with second nut, and described the One pipeline is provided with the first fixation kit, and the second pipe is provided with the second fixation kit, and the first flange disk is provided with Fixing bolt for fixing first flange disk and second flange disk, the first connecting portion at second connecting portion cooperation with being provided with Sealing ring.
2. the flange arrangement of pipeline connection according to claim 1, it is characterised in that:The first neck inwall is provided with The first sealing gasket being engaged with first pipeline, the second neck inwall is provided with the be engaged with the second pipe It is provided with two sealing gaskets, the first fixed cover outer fix in circular the first limiting plate set, second fixed cover It is provided with outer fix in circular the second limiting plate set, the second flange disk is provided with locating rod, first method Blue disk is provided with the locating slot being engaged with the locating rod, and the locating slot inwall is with being provided with rubber ring at locating rod cooperation.
3. the flange arrangement of pipeline connection according to claim 1, it is characterised in that:First fixation kit is by One locating ring and the second locating ring composition, first locating ring are provided with the first installing plate, and second locating ring is provided with The second installing plate being engaged with first installing plate, first installing plate, which is provided with, to be used to fix the first installing plate and the The first otic placode, first ear are equipped with first installation bolt of two installing plates, first locating ring and the second locating ring Plate, which is provided with to be used to fix, is arranged with the on the first bolt of the first otic placode and first flange disk, first bolt One spring, first spring one end offsets with the first otic placode, and the other end offsets with first flange disk, first locating ring and The first flexible gasket is equipped with the side that second locating ring and the first pipeline outer wall coordinate.
4. the flange arrangement of pipeline connection according to claim 1, it is characterised in that:Second fixation kit is by Three locating rings and the 4th locating ring composition, the 3rd locating ring are provided with the 3rd installing plate, and the 4th locating ring is provided with The 4th installing plate being engaged with the 3rd installing plate, the 3rd installing plate, which is provided with, to be used to fix the 3rd installing plate and the The second otic placode, second ear are equipped with second installation bolt of four installing plates, the 3rd locating ring and the 4th locating ring Plate is provided with the second bolt for being used for fixing the second otic placode and second flange disk, and second bolt is provided with second Spring, described second spring one end offsets with the second otic placode, and the other end offsets with second flange disk, the 3rd locating ring and The second flexible gasket is equipped with the side that four locating rings coordinate with second pipe outer wall.
5. the flange arrangement of pipeline connection according to claim 1, it is characterised in that:The fixing bolt is provided with four Individual, the first connecting portion, first flange disk and the first fixed part are integral by the way of once-cast, and described second connects Socket part, second flange disk and the second fixed part are integral by the way of once-cast.
6. the flange arrangement of pipeline connection according to claim 1, it is characterised in that:First fixed cover and first Fixed part coordinates, provided with the first sealing ring at first fixed cover and the first fixed part cooperation, second fixed cover and the Two fixed parts coordinate, and the second sealing ring is provided with second fixed cover and the second fixed part cooperation.
7. the flange arrangement of pipeline connection according to claim 3, it is characterised in that:First bolt is provided with Two, first otic placode is weldingly fixed on the first fixation kit.
8. the flange arrangement of pipeline connection according to claim 4, it is characterised in that:Second bolt is provided with Two, second otic placode is weldingly fixed on the second fixation kit.
CN201720006342.3U 2017-01-04 2017-01-04 A kind of flange arrangement of pipeline connection Active CN206439540U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720006342.3U CN206439540U (en) 2017-01-04 2017-01-04 A kind of flange arrangement of pipeline connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720006342.3U CN206439540U (en) 2017-01-04 2017-01-04 A kind of flange arrangement of pipeline connection

Publications (1)

Publication Number Publication Date
CN206439540U true CN206439540U (en) 2017-08-25

Family

ID=59642315

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720006342.3U Active CN206439540U (en) 2017-01-04 2017-01-04 A kind of flange arrangement of pipeline connection

Country Status (1)

Country Link
CN (1) CN206439540U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575658A (en) * 2017-09-30 2018-01-12 浙江正元地理信息有限责任公司 A kind of water utilities pipe special
CN107940136A (en) * 2017-12-12 2018-04-20 天津新势力能源科技有限公司 Gas pipeline docks fixing device and construction method
CN108413148A (en) * 2018-05-23 2018-08-17 贾小红 A kind of pipeline for Petroleum refining is to connected components
CN108915610A (en) * 2018-06-14 2018-11-30 李志明 A kind of oil field gas production pipe joint and application method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575658A (en) * 2017-09-30 2018-01-12 浙江正元地理信息有限责任公司 A kind of water utilities pipe special
CN107940136A (en) * 2017-12-12 2018-04-20 天津新势力能源科技有限公司 Gas pipeline docks fixing device and construction method
CN108413148A (en) * 2018-05-23 2018-08-17 贾小红 A kind of pipeline for Petroleum refining is to connected components
CN108413148B (en) * 2018-05-23 2019-10-18 金丽秋 A kind of pipeline for Petroleum refining is to connected components
CN108915610A (en) * 2018-06-14 2018-11-30 李志明 A kind of oil field gas production pipe joint and application method
CN108915610B (en) * 2018-06-14 2020-05-19 李志明 Pipeline joint for oil field gas production and use method

Similar Documents

Publication Publication Date Title
CN206439540U (en) A kind of flange arrangement of pipeline connection
CN205781543U (en) A kind of pressure-air pipe flange
CN204879266U (en) Harf union joint
CN209959960U (en) Liquefied gas safety valve convenient to dismantle
CN207005520U (en) A kind of assembling pipe joint
CN107654764A (en) A kind of easy air-conditioning duct attachment structure
CN108131516A (en) Pipe jointer gasket
CN204127515U (en) A kind of air-conditioner of engineering machinery pipeline connects novel sealing structure
CN208670332U (en) A kind of hydraulic joint pipe end connection bridgeware
CN206377371U (en) A kind of flange connecting hose
CN204201373U (en) There is the water pipe of sheath
CN107575672B (en) Smoke exhaust pipe installation joint assembly, smoke exhaust pipe assembly and range hood
CN204127516U (en) A kind of air-conditioner of engineering machinery pipeline connects sealing configuration
CN207279082U (en) A kind of PVC drain pipe pipe connecting
CN205745850U (en) A kind of pipe fitting plug part
CN208793847U (en) A kind of assembling pipe joint for refrigeration equipment
CN203546442U (en) Washing machine water inlet pipe connector assembly
CN208311721U (en) Pipe jointer gasket
CN103776591B (en) The test unit of cryogenic valve
CN208764529U (en) Pipeline connecting device and pipeline
CN202597986U (en) Rapid mounting structure for water outlet device
CN206112264U (en) Pipeline locking device
CN201696759U (en) Pipe thread flexible joint
CN205479829U (en) A connecting piece for nonrust steel pipe
CN206608641U (en) A kind of pipe connecting structure

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant