CN210153407U - Pipeline collapse compound circle inner lining ring - Google Patents

Pipeline collapse compound circle inner lining ring Download PDF

Info

Publication number
CN210153407U
CN210153407U CN201920496823.6U CN201920496823U CN210153407U CN 210153407 U CN210153407 U CN 210153407U CN 201920496823 U CN201920496823 U CN 201920496823U CN 210153407 U CN210153407 U CN 210153407U
Authority
CN
China
Prior art keywords
pipeline
lining plate
pipeline body
inner lining
lantern ring
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
CN201920496823.6U
Other languages
Chinese (zh)
Inventor
高永成
李宏
郑敏
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.)
Shanxi Onodi Environmental Protection Technology Co Ltd
Original Assignee
Shanxi Onodi Environmental Protection 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 Shanxi Onodi Environmental Protection Technology Co Ltd filed Critical Shanxi Onodi Environmental Protection Technology Co Ltd
Priority to CN201920496823.6U priority Critical patent/CN210153407U/en
Application granted granted Critical
Publication of CN210153407U publication Critical patent/CN210153407U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model discloses a lining ring in pipeline collapse and rounding, which comprises a pipeline body, an inner lining plate, a support piece and a lantern ring, wherein the inner lining plate is arranged inside the pipeline body, the inner lining plate is inserted inside the pipeline body, the support piece is arranged around the inner lining plate, the support piece is welded and fixed with the inner lining plate, the support piece is in contact connection with the inside of the pipeline body, the interlayer between the inner lining plate and the pipeline body is filled with chemical pulp, the lining ring in pipeline collapse and rounding is used for inserting the inner lining plate inside the pipeline body and blocking the broken part of the pipeline body, the inner lining plate is fixed with the inside of the pipeline body under the action of elastic force, the chemical pulp is filled in the interlayer between the pipeline body and the inner lining plate, the chemical pulp is expanded in the curing process, the broken part of the pipeline body is repaired, and the lantern ring is sleeved outside the pipeline body through a, the connection sealing performance of the pipeline body is improved, chemical grout is prevented from overflowing during grouting, and the repair reliability is improved.

Description

Pipeline collapse compound circle inner lining ring
Technical Field
The utility model relates to a pipeline repair technical field specifically is a lining ring in compound circle of pipeline subsides.
Background
Underground drainage pipelines, sewage discharge pipelines, drinking water pipelines and the like are essential infrastructures in life of people. Due to the reasons of insecure foundation, pipeline corrosion and the like, the pipeline can be aged, corroded, cracked, collapsed and other damage phenomena after being used for a long time, so that the normal production and life are adversely affected, and the pipeline needs to be maintained in time.
At present, a better method for repairing a pipeline is a lining method, namely, a lining pipe is placed in the pipeline to be repaired, then grouting material is injected between the inner wall of the pipeline to be repaired and the lining, and after the grouting material is solidified, the repairing work of the pipeline is completed. But when the pipeline damage is more serious, repair it with the inside lining pipe, when pouring into grout between pipeline inner wall and inside lining, often because the pipeline damage seriously leads to grout to ooze, just so need carry out preliminary repair to the place that the pipeline damage is serious to prevent grout from leaking.
SUMMERY OF THE UTILITY MODEL
Solves the technical problem
The utility model provides a not enough to prior art, the utility model provides a lining ring in compound circle is subsided to pipeline has solved at present, and the method better to the restoration of pipeline is the inside lining method, is about to the inside lining pipe arrange in treating prosthetic pipeline, then pours into the grout material into between treating prosthetic pipeline inner wall and inside lining into, treats after the grout material solidifies, accomplishes the restoration work of pipeline promptly. But when the pipeline damage is more serious, repair it with the inside lining pipe, when pouring into grout between pipeline inner wall and inside lining, often because the pipeline damage seriously leads to grout to ooze, just so need carry out preliminary repair to the place that the pipeline damage is serious to prevent grout from leaking.
Technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a pipeline collapse double-circle inner lining ring comprises a pipeline body, an inner lining plate, supporting pieces and a sleeve ring, wherein the inner lining plate is arranged inside the pipeline body and is inserted inside the pipeline body, the supporting pieces are arranged on the periphery of the inner lining plate and are welded and fixed with the inner lining plate, the supporting pieces are in contact connection with the inside of the pipeline body, chemical pulp is filled in an interlayer between the inner lining plate and the pipeline body, the sleeve ring is arranged outside the pipeline body and is sleeved at a fracture part of the pipeline body, a fixing block is arranged on the upper portion of the sleeve ring and is integrally formed with the sleeve ring, a fixing bolt is arranged inside the fixing block, the sleeve ring penetrates through the fixing block and is fixed outside the pipeline body, an extension groove is arranged inside the sleeve ring, an extension end is arranged on the left side of the sleeve ring and is inserted into the extension groove, and, the extension groove is internally provided with a second clamping groove, the second clamping block is embedded with the second clamping groove, and the extension end is connected with the second clamping groove and the extension groove in a buckling mode through the second clamping block.
Preferably, the surface of the lining plate is provided with reinforcing ribs, and the reinforcing ribs are welded on the surface of the lining plate.
Preferably, the upper part and the lower part of the inner lining plate are both provided with elastic rods, the right side of each elastic rod is provided with a first connecting block, two sides of each first connecting block are provided with first clamping blocks, the left side of each elastic rod is provided with a second connecting block, a first clamping groove is formed in each second connecting block, and the first clamping grooves are embedded with the first clamping blocks.
Preferably, the left side of the lining plate is provided with a connecting plate, the right side of the lining plate is provided with a groove, and the connecting plate is embedded with the groove.
Preferably, the surface of the sleeve ring is provided with an anti-corrosion coating which is uniformly coated on the surface of the sleeve ring.
Preferably, the bottom of the lantern ring is provided with a rubber ring, and the rubber ring is sleeved outside the pipeline body and is in contact connection with the lantern ring.
Preferably, the lining plate, the reinforcing ribs and the lantern ring are all made of stainless steel materials.
Advantageous effects
The utility model provides a lining ring in compound circle that pipeline sinks. The method has the following beneficial effects:
(1) this kind of lining ring in compound circle is subsided to pipeline, peg graft inside pipeline body with interior welt during the use, support interior welt through support piece, stop up the department that breaks of pipeline body, interior welt passes through support piece and pipeline body is inside fixed because the interior welt of effect of elasticity, chemical grout is filled in the intermediate layer department of pipeline body and interior welt, the inflation in the chemical grout curing process, restore the department that breaks of pipeline body, guarantee pipeline body normal use, the lantern ring passes through the fixed block and cup joints outside pipeline body with fixed bolt, the second fixture block of extension end and the second draw-in groove gomphosis in the extension groove, connection stability between the lantern ring has been increased, and the leakproofness of being connected with pipeline body has been increased, chemical grout spills over when avoiding the grout, prosthetic reliability has been increased.
(2) This kind of lining ring in pipeline collapse is compound round, the setting up of strengthening rib has increased the fastness of interior welt, the strengthening rib has also played certain supporting role, the elastic rod passes through the first fixture block of first connecting block and the second draw-in groove gomphosis of second connecting block, it is fixed to make the elastic rod install more easily when crooked coiling, the convenience of operation has been increased, connecting plate and recess gomphosis, stability when the crooked coiling of interior welt has also been increased, the setting up of anticorrosion coating can effectively reduce the corruption that external factor caused the lantern ring, the life of the lantern ring has been increased, the rubber circle has good elasticity and toughness, can be tight laminating outside the pipeline body, the adaptability between lantern ring and pipeline body has been increased, the fastness of connection has been increased, interior welt, the strengthening rib, the stainless steel material that the lantern ring adopted has good plasticity, toughness, weldability, The corrosion resistance is better in oxidizing and reducing media.
Drawings
FIG. 1 is a schematic sectional view of the present invention;
FIG. 2 is a schematic view of the expanded structure of the lining plate of the present invention;
FIG. 3 is a schematic view of the internal structure of the collar of the present invention;
in the figure, a pipeline body-1, a lantern ring-2, a fixing block-3, a fixing bolt-4, chemical pulp-5, a supporting piece-6, an inner lining plate-7, an elastic rod-8, a first connecting block-9, a first clamping block-10, a second connecting block-11, a first clamping groove-12, a connecting plate-13, a groove-14, a reinforcing rib-15, an extending end-16, a second clamping groove-17, a second clamping block-18, a rubber ring-19 and an extending groove-20.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: a pipeline collapse compound circle inner lining ring comprises a pipeline body 1, an inner lining plate 7, supporting pieces 6 and a sleeve ring 2, wherein the inner lining plate 7 is arranged inside the pipeline body 1, the inner lining plate 7 is inserted inside the pipeline body 1, the supporting pieces 6 are arranged around the inner lining plate 7, the supporting pieces 6 and the inner lining plate 7 are welded and fixed, the supporting pieces 6 are in contact connection with the inside of the pipeline body 1, a chemical slurry 5 is filled in an interlayer between the inner lining plate 7 and the pipeline body 1, the sleeve ring 2 is arranged outside the pipeline body 1, the sleeve ring 2 is sleeved at a fracture part of the pipeline body 1, a fixing block 3 is arranged at the upper part of the sleeve ring 2, the fixing block 3 and the sleeve ring 2 are integrally formed, a fixing bolt 4 is arranged inside the fixing block 3, the sleeve ring 2 penetrates through the fixing block 3 through the fixing bolt 4 and is fixed outside the pipeline body 1, an extension end 16 is arranged on the left side of the lantern ring 2, the extension end 16 is inserted into an extension groove 20, second clamping blocks 18 are arranged on two sides of the extension end 16, a second clamping groove 17 is arranged in the extension groove 20, the second clamping blocks 18 are embedded with the second clamping groove 17, and the extension end 16 is connected with the second clamping groove 17 and the extension groove 20 in a buckling mode through the second clamping blocks 18.
The surface of the inner lining plate 7 is provided with the reinforcing ribs 15, the reinforcing ribs 15 are welded on the surface of the inner lining plate 7, the firmness of the inner lining plate 7 is improved due to the arrangement of the reinforcing ribs 15, and the reinforcing ribs 15 also play a certain supporting role.
The upper and lower parts of the inner lining plate 7 are respectively provided with an elastic rod 8, the right side of the elastic rod 8 is provided with a first connecting block 9, two sides of the first connecting block 9 are provided with first clamping blocks 10, the left side of the elastic rod 8 is provided with a second connecting block 11, a first clamping groove 12 is arranged inside the second connecting block 11, the first clamping groove 12 is embedded with the first clamping block 10, and the elastic rod 8 is embedded with a second clamping groove 17 of the second connecting block 11 through the first clamping block 10 of the first connecting block 9, so that the elastic rod 8 is easier to mount and fix when being bent into a roll, and the convenience in operation is improved.
The left side of the lining plate 7 is provided with a connecting plate 13, the right side of the lining plate 7 is provided with a groove 14, the connecting plate 13 is embedded with the groove 14, and the stability of the lining plate 7 when being bent into a coil is increased.
The surface of the lantern ring 2 is provided with an anti-corrosion coating which is evenly coated on the surface of the lantern ring 2, the corrosion of external factors to the lantern ring can be effectively reduced due to the anti-corrosion coating, and the service life of the lantern ring 2 is prolonged.
The bottom of the lantern ring 2 is provided with a rubber ring 19, the rubber ring 19 is sleeved outside the pipeline body 1 and is in contact connection with the lantern ring 2, the rubber ring 19 has good elasticity and toughness, the outside of the fitting pipeline body 1 can be tightly, adaptability between the lantern ring 2 and the pipeline body 1 is increased, and connection firmness is increased.
The lining plate 7, the reinforcing ribs 15 and the lantern ring 2 are all made of stainless steel materials, and the lining plate 7, the reinforcing ribs 15 and the lantern ring 2 are made of stainless steel materials which have good plasticity, toughness, weldability and corrosion resistance and are good in oxidation and reducing media.
The working principle is as follows: insert interior bushing plate 7 inside pipeline body 1 during the use, support interior bushing plate 7 through support piece 6, stop up the department of breaking of pipeline body 1, interior bushing plate 7 passes through support piece 6 and pipeline body 1 is inside fixed because of the effect of elasticity, chemical pulp 5 is filled in the intermediate layer department of pipeline body 1 and interior bushing plate 7, the inflation in the 5 curing process of chemical pulp, restore the department of breaking of pipeline body 1, guarantee pipeline body 1 normal use, lantern ring 2 cup joints outside pipeline body 1 through fixed block 3 and fixing bolt 4, the second fixture block 18 of extension end 16 and the second draw-in groove 17 gomphosis in the extension groove 20, the connection stability between the lantern ring 2 has been increased, and the connection leakproofness with pipeline body 1 has been increased, chemical pulp 5 spills over when avoiding the grout, prosthetic reliability has been increased. The arrangement of the reinforcing ribs 15 increases the firmness of the lining plate 7, the reinforcing ribs 15 also play a certain supporting role, the elastic rod 8 is embedded into the second clamping groove 17 of the first connecting block 10 and the second connecting block 11 through the first clamping block 9 of the first connecting block 9, so that the elastic rod 8 can be more easily installed and fixed when being bent into a coil, the convenience of operation is increased, the connecting plate 13 is embedded into the groove 14, the stability of the lining plate 7 when being bent into a coil is also increased, the corrosion-resistant coating can effectively reduce the corrosion of external factors on the lantern ring, the service life of the lantern ring 2 is prolonged, the rubber ring 19 has good elasticity and toughness, the rubber ring can be tightly attached to the outside of the pipeline body 1, the adaptability between the lantern ring 2 and the pipeline body 1 is increased, the connection firmness is increased, and the lining plate 7, the reinforcing ribs 15 and the stainless steel adopted by the lantern ring 2 have good plasticity, toughness, The weldability, the corrosion resistance, and the corrosion resistance in oxidizing and reducing media are good.
The utility model comprises a pipeline body 1, a lantern ring 2, a fixed block 3, a fixed bolt 4, chemical pulp 5, a support piece 6, an inner lining plate 7, an elastic rod 8, a first connecting block 9, a first clamping block 10, a second connecting block 11, a first clamping groove 12, a connecting plate 13, a groove 14, a reinforcing rib 15, an extending end 16, a second clamping groove 17, a second clamping block 18, a rubber ring 19, an extending groove 20 and an anti-corrosion coating, wherein the components are all universal standard components or components known by technicians in the field, the structure and the principle of the device can be known by technicians through technical manuals or conventional experimental methods, the device solves the problem that the prior method for repairing the pipeline is a lining method, namely, the lining pipe is arranged in the pipeline to be repaired, then grouting material is injected between the inner wall of the pipeline to be repaired and the lining, and the pipeline repairing work is finished after the grouting material is solidified. When the pipeline is seriously damaged, the lining pipe is used for repairing the pipeline, when grouting material is injected between the inner wall of the pipeline and the lining, the grouting material is often caused to seep due to serious damage of the pipeline, so that the place with serious damage of the pipeline needs to be preliminarily repaired to prevent the grouting material from leaking, through the mutual combination of the parts, the pipeline collapse inner lining ring is inserted into the pipeline body when in use, the lining plate is supported by the supporting piece to block the broken part of the pipeline body, because the lining plate is fixed with the inside of the pipeline body by the supporting piece under the action of elastic force, chemical slurry is filled in the interlayer of the pipeline body and the lining plate, the chemical slurry is expanded in the curing process to repair the broken part of the pipeline body, the normal use of the pipeline body is ensured, and the lantern ring is sleeved outside the pipeline body by the fixing block and the fixing bolt, the second fixture block of extension end and the second draw-in groove gomphosis in the extension groove have increased the connection stability between the lantern ring, and have increased the leakproofness of being connected with the pipeline body, and chemical pulp spills over when avoiding being in milk, has increased prosthetic reliability. The arrangement of the reinforcing ribs increases the firmness of the lining plate, the reinforcing ribs also play a certain supporting role, the elastic rod is embedded with the second clamping groove of the second connecting block through the first clamping block of the first connecting block, so that the elastic rod is easier to install and fix when being bent into a coil, the convenience of operation is increased, the connecting plate is embedded with the groove, the stability of the lining plate when being bent into a coil is also increased, the corrosion of external factors on the lantern ring can be effectively reduced due to the arrangement of the anti-corrosion coating, the service life of the lantern ring is prolonged, the rubber ring has good elasticity and toughness, can be tightly attached to the outside of the pipeline body, the adaptability between the lantern ring and the pipeline body is increased, the firmness of connection is increased, and the stainless steel materials adopted by the lining plate, the reinforcing ribs and the lantern ring have good plasticity, toughness, weldability, corrosion resistance, and good corrosion resistance in oxidizing and reducing media.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. A pipeline collapsing compound circle inner liner, characterized in that: comprises a pipeline body (1), an inner lining plate (7), a support piece (6) and a lantern ring (2), wherein the inner lining plate (7) is arranged inside the pipeline body (1), the inner lining plate (7) is inserted inside the pipeline body (1), the support piece (6) is arranged around the inner lining plate (7), the support piece (6) is welded and fixed with the inner lining plate (7), the support piece (6) is in contact connection with the inside of the pipeline body (1), a chemical slurry (5) is filled in an interlayer between the inner lining plate (7) and the pipeline body (1), the lantern ring (2) is arranged outside the pipeline body (1), the lantern ring (2) is sleeved at a fracture part of the pipeline body (1), a fixed block (3) is arranged on the upper part of the lantern ring (2), the fixed block (3) and the lantern ring (2) are integrally formed, a fixed bolt (4) is arranged inside the fixed block (3), the lantern ring (2) runs through fixed block (3) through fixing bolt (4) and fixes in pipeline body (1) outside, the inside extension groove (20) that is equipped with of lantern ring (2), lantern ring (2) left side is equipped with extension end (16), it pegs graft in extension groove (20) to extend end (16), it is equipped with second fixture block (18) to extend end (16) both sides, be equipped with second draw-in groove (17) in extension groove (20), second fixture block (18) and second draw-in groove (17) gomphosis mutually, it is connected with second draw-in groove (17) and extension groove (20) buckle through second fixture block (18) to extend end (16).
2. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: and reinforcing ribs (15) are arranged on the surface of the inner lining plate (7), and the reinforcing ribs (15) are welded on the surface of the inner lining plate (7).
3. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: the inner lining plate (7) is provided with an elastic rod (8) from top to bottom, a first connecting block (9) is arranged on the right side of the elastic rod (8), first clamping blocks (10) are arranged on two sides of the first connecting block (9), a second connecting block (11) is arranged on the left side of the elastic rod (8), a first clamping groove (12) is formed in the second connecting block (11), and the first clamping groove (12) is embedded with the first clamping blocks (10).
4. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: the left side of the inner lining plate (7) is provided with a connecting plate (13), the right side of the inner lining plate (7) is provided with a groove (14), and the connecting plate (13) is embedded with the groove (14).
5. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: the surface of the lantern ring (2) is provided with an anti-corrosion coating, and the anti-corrosion coating is uniformly coated on the surface of the lantern ring (2).
6. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: the bottom of the lantern ring (2) is provided with a rubber ring (19), and the rubber ring (19) is sleeved outside the pipeline body (1) and is in contact connection with the lantern ring (2).
7. The pipeline collapsing compound inner liner as claimed in claim 1, wherein: the inner lining plate (7), the reinforcing ribs (15) and the lantern ring (2) are all made of stainless steel materials.
CN201920496823.6U 2019-04-13 2019-04-13 Pipeline collapse compound circle inner lining ring Active CN210153407U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920496823.6U CN210153407U (en) 2019-04-13 2019-04-13 Pipeline collapse compound circle inner lining ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920496823.6U CN210153407U (en) 2019-04-13 2019-04-13 Pipeline collapse compound circle inner lining ring

Publications (1)

Publication Number Publication Date
CN210153407U true CN210153407U (en) 2020-03-17

Family

ID=69756925

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920496823.6U Active CN210153407U (en) 2019-04-13 2019-04-13 Pipeline collapse compound circle inner lining ring

Country Status (1)

Country Link
CN (1) CN210153407U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112112248A (en) * 2020-08-28 2020-12-22 中电建生态环境集团有限公司 Method for repairing defect of channel box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112112248A (en) * 2020-08-28 2020-12-22 中电建生态环境集团有限公司 Method for repairing defect of channel box

Similar Documents

Publication Publication Date Title
CN210153407U (en) Pipeline collapse compound circle inner lining ring
CN109025899B (en) Well sealing device
CN114319678B (en) Water stopping structure of water room and water stopping construction method
CN206607873U (en) A kind of pre-buried structure of anti-dropout
CN104964121A (en) Blockage method for leakage water in sleeve pipe
CN204403607U (en) A kind of prestress steel cylinder concrete push pipe with pea gravel concreten protective layer
CN210179083U (en) Glass fiber reinforced polyester concrete jacking pipe
CN113622327A (en) Culvert settlement joint water seepage repairing structure and method for repairing settlement joint
CN213065103U (en) Pipeline collapse compound circle inner lining ring
CN206958411U (en) Wear-resistant high temperature resistant explosion-proof drainpipe
CN210890428U (en) Anti-permeability and anti-corrosion integrated reinforced concrete drain pipe
CN216239260U (en) Water supply and drainage embedded part for building
CN110593629A (en) Construction method and structure for reinforcing and preventing leakage of old pool side wall through hole opening
CN205636799U (en) Inspection shaft with reinforcing rib structure
CN214500310U (en) Installation device for arranging waterproof sleeve
CN215831405U (en) Socket type cement pipe joint first-aid repair piece
CN220957185U (en) Device for improving waterproof performance of pipeline penetrating through floor slab
CN220930446U (en) Rigid-flexible double-socket self-sealing composite pipe
CN215330197U (en) Grouting hole structure of prefabricated pump station
CN203500682U (en) Reinforced type concrete glass-reinforced plastic synthetic pipe
CN215934404U (en) Embedded part for discharging fresh water concrete of electrical embedded pipeline
CN219888963U (en) Be applied to hydraulic engineering's drainage culvert pipe
CN117845989A (en) Plugging device for pressure-bearing water well
CN211285904U (en) City planning municipal administration is with drainage pipe of installation of being convenient for
CN217603531U (en) Pipeline wall body junction antiseep device

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant