CN110778970B - Light guide pipe elbow with reinforcing sleeve cage and construction method thereof - Google Patents

Light guide pipe elbow with reinforcing sleeve cage and construction method thereof Download PDF

Info

Publication number
CN110778970B
CN110778970B CN201911093454.7A CN201911093454A CN110778970B CN 110778970 B CN110778970 B CN 110778970B CN 201911093454 A CN201911093454 A CN 201911093454A CN 110778970 B CN110778970 B CN 110778970B
Authority
CN
China
Prior art keywords
cage
sleeve
elbow
annular
protective sleeve
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
CN201911093454.7A
Other languages
Chinese (zh)
Other versions
CN110778970A (en
Inventor
张超
蓝盟强
王兆权
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.)
China 19th Metallurgical Corp
Original Assignee
China 19th Metallurgical Corp
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 China 19th Metallurgical Corp filed Critical China 19th Metallurgical Corp
Priority to CN201911093454.7A priority Critical patent/CN110778970B/en
Publication of CN110778970A publication Critical patent/CN110778970A/en
Application granted granted Critical
Publication of CN110778970B publication Critical patent/CN110778970B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S11/00Non-electric lighting devices or systems using daylight
    • F21S11/007Non-electric lighting devices or systems using daylight characterised by the means for transmitting light into the interior of a building
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/40Use of light guides, e.g. fibre optic devices, in lighting devices or systems of hollow light guides

Abstract

The invention discloses a light pipe elbow with a reinforcing sleeve cage, which comprises an elbow body, an annular protective sleeve, a plurality of annular sleeves and a plurality of bent connecting ribs, wherein the annular sleeves are sleeved outside the elbow body, each connecting rib is fixedly connected with each protective sleeve, so that the plurality of annular sleeves and the plurality of connecting ribs surround the bent cage body, and the protective sleeves are wrapped outside the cage body. Also provides a construction method of the light guide pipe elbow with the reinforcing sleeve cage. The reinforcing cage is located outside the light guide pipe elbow, can effectively protect the light guide pipe elbow, avoids the light guide pipe elbow from being damaged in the construction and subsequent use processes, and ensures the safety of the light guide pipe elbow.

Description

Light guide pipe elbow with reinforcing sleeve cage and construction method thereof
Technical Field
The invention relates to the technical field of building lighting, in particular to a light pipe elbow with a reinforcing sleeve cage and a construction method thereof.
Background
The light guide pipe elbow is a common lighting mechanism in the current building, can be used for natural light utilization of rooms and spaces above a building floor, underground parking lots or markets, and has the advantage of reducing energy consumption.
The existing light pipe elbow comprises an elbow, a light collecting cover and a diffuser, wherein the elbow is embedded in concrete, one end of the elbow is a light collecting end located outside a building, the other end of the elbow is a light emitting end located inside the building, the light collecting cover is installed at the light collecting end, the diffuser is installed at the light emitting end, external light enters the inside of the building after passing through the light collecting cover, the elbow and the diffuser, and then the space inside the building can be illuminated.
At present, the elbow is directly pre-buried in the concrete, and because the material of preparation elbow is aluminium foil light guide material, intensity is not high, and thickness is less, and easy deformation, damage in construction and follow-up use.
Disclosure of Invention
The invention aims to solve the technical problem of providing a light pipe elbow with a reinforcing sleeve cage and a construction method thereof, which can effectively protect the elbow and avoid the elbow from being damaged in construction and subsequent use.
The technical scheme adopted by the invention for solving the technical problem is as follows: light pipe elbow with consolidate lantern ring, including the elbow body, still include annular protective sheath of circle, a plurality of annular ring of circle and many crooked splice bars, the annular cover overlaps this external every at the elbow the splice bar and each protective sheath fixed connection for a plurality of annular covers and many splice bars enclose into crooked cage, the protective sheath parcel is external at the cage.
Further, the connecting ribs are fixedly connected with the inner side of the annular sleeve.
Furthermore, the protective sleeves are multiple and are sleeved outside the connecting ribs between the two adjacent annular sleeves.
Furthermore, the protective sleeve is provided with an injection hole and is connected with the elbow body through a filling material layer.
Further, the annular sleeve is a flat iron sleeve.
Further, the splice bar includes bow back splice bar in 2 the same stringcourse splice bars, 1 outer bow back splice bar and 1, and outer bow back splice bar is located the maximum radius department of the cage body, and interior bow back splice bar is located the minimum radius department of the cage body, and 2 stringcourse splice bars are located the both sides of the cage body.
Furthermore, the waist line connecting rib is a steel bar, and the inner bow back connecting rib and the outer bow back connecting rib are flat irons.
Further, the number of the annular sleeves is at least 5.
The construction method of the light guide pipe elbow with the reinforcing cage comprises the following steps:
A. assembling an annular sleeve and a connecting rib outside the elbow body to form a cage body surrounding the elbow body;
B. cutting and blanking on the thin plate, wrapping the thin plate on the cage body to form a protective sleeve, and forming a reinforcing cage by the protective sleeve and the cage body;
C. drilling an injection hole on the protective sleeve, injecting a filling material into the protective sleeve through the injection hole, and filling the space between the protective sleeve and the elbow body with the filling material and connecting the protective sleeve and the elbow body into a whole;
D. taking the reinforcing sleeve cage as an inner template, building an outer template outside the reinforcing sleeve cage, and injecting concrete into a space between the inner template and the outer template to obtain a concrete cylinder;
E. and after the concrete cylinder passes through the maintenance period, the outer template is detached.
Further, in the step A, the connecting ribs are positioned on the inner side of the annular sleeve;
and in the step B, the thin plate is a galvanized iron sheet, the galvanized iron sheet is cut according to the distance between two adjacent annular sleeves, then the galvanized iron sheet is wrapped on the connecting ribs between the two adjacent annular sleeves, and the two ends of the galvanized iron sheet are welded and connected to form the protective sleeve.
Compared with the prior art, the invention has the beneficial effects that: the reinforcing cage is located outside the light guide pipe elbow, can effectively protect the light guide pipe elbow, avoids the light guide pipe elbow from being damaged in the construction and subsequent use processes, and ensures the safety of the light guide pipe elbow.
Drawings
FIG. 1 is a schematic view of a cage body composed of an annular sleeve and connecting ribs according to the present invention;
FIG. 2 is a schematic cross-sectional view of a reinforcement cage of the present invention;
FIG. 3 is a schematic cross-sectional view of a light pipe bend of the present invention;
FIG. 4 is a schematic illustration of the cast concrete of the present invention;
reference numerals: 1-annular sleeve; 2-connecting ribs; 21-waist line connecting ribs; 22-inner bow back connecting rib; 23-outer bow back connecting rib; 3, protecting the sleeve; 31-an injection hole; 32-a layer of filler material; 10-elbow body; 20-external template; 30-concrete cylinder.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The light guide pipe elbow with the reinforcing sleeve cage comprises an elbow body 10, and further comprises an annular protective sleeve 3, a plurality of annular sleeves 1 and a plurality of bent connecting ribs 2, wherein the annular sleeves 1 are sleeved outside the elbow body 10, each connecting rib 2 is fixedly connected with each protective sleeve 3, so that the plurality of annular sleeves 1 and the plurality of connecting ribs 2 form a bent cage body in a surrounding mode, and the protective sleeves 3 are wrapped outside the cage body.
The elbow body 10 can be any of various existing elbow structures of light pipes. The protective sleeve 3 is formed by bending a metal plate with a certain thickness, has high strength, resists impact and abrasion, and can be made of galvanized iron sheet with the thickness of 1-3 mm. The annular sleeve 1 is annular, and the annular sleeve 1 and the connecting ribs 2 are made of materials with higher strength so as to ensure good protection performance. A plurality of annular cover 1 evenly distributed, the radian of splice bar 2 keeps unanimous with the radian of elbow body 10 for the radian of the cage body is unanimous with the radian of elbow body 10. The central line of the elbow body 10 is generally a circular arc line, so that after the light pipe elbow is arranged in the cage body, the centers of all the annular sleeves 1 are positioned on the central line of the light pipe elbow, and the distances from the annular sleeves 1 to the light pipe elbow are ensured to be equal.
The connecting rib 2 can be fixed and set up in the inboard of annular cover 1, also can be fixed and set up in the outside of annular cover 1, and protective sheath 3 can be a holistic sleeve, all wraps up whole cage body, nevertheless in order to reduce the thickness of whole reinforcement cover cage, and protective sheath 3 can be pasted tightly with each connecting rib 2 when wrapping up the cage body, connecting rib 2 and the inboard fixed connection of annular cover 1, protective sheath 3 are a plurality of, and protective sheath 3 cover is outside connecting rib 2 between two adjacent annular covers 1. Because protective sheath 3 is located between two adjacent annular cover 1, the both sides limit of every protective sheath 3 can with the contact of annular cover 1, the inner wall can be pasted tightly with splice bar 2, has reduced the thickness of the cage body, guarantees simultaneously that splice bar 2 supports protective sheath 3 steadily.
In order to ensure that the elbow body 10 is stably fixed inside the cage body, the protective sleeve 3 is provided with an injection hole 31, and the protective sleeve 3 is connected with the elbow body 10 through a filling material layer 32. During construction, after the protective sleeve 3 is wrapped on the cage body, the injection hole 31 is drilled in the protective sleeve 3, the hole diameter of the injection hole 31 is about 10mm, and then the filling material is injected through the injection hole 31, so that the filling material fills the space between the protective sleeve 3 and the elbow body 10 and forms the filling material layer 32, the filling material can adopt an adhesive, a foaming agent or cement mortar and the like, the protective sleeve 3 and the elbow body 10 can be stably and firmly connected, and subsequent construction can be conveniently carried out and the position of the elbow body 10 can be conveniently fixed. Meanwhile, the buffer function can be achieved, and the elbow body 10 is further protected.
The annular sleeve 1 can be a steel bar sleeve, a steel pipe and the like, and preferably, the annular sleeve 1 is a flat iron sleeve. When the annular sleeve 1 is manufactured, the flat iron is bent into an annular shape, and two ends of the flat iron are welded and connected. The section of band iron is the rectangle, and is circular shape material with the section and compares, and the band iron cover of making can have great area of contact with between splice bar 2, can guarantee the stability of being connected of annular cover 1 and splice bar 2, strengthens the intensity of the cage body.
The splice bar 2 can all adopt reinforcing bar, steel pipe etc. and the quantity of splice bar 2 can be 4, 5, 6, 7, 8 or more, preferred, splice bar 2 includes in 2 the same stringcourse splice bars 21, 1 outer back of the body splice bar 23 and 1 the back of the body splice bar 22, and outer back of the body splice bar 23 is located the maximum radius department of the cage body, and interior back of the body splice bar 22 is located the minimum radius department of the cage body, and 2 stringcourse splice bars 21 are located the both sides of the cage body. The waist line connecting rib is a steel bar, and the inner bow back connecting rib and the outer bow back connecting rib are flat irons. The distribution of stringcourse splice bar 21, outer bow back splice bar 23 and interior bow back splice bar 22 is shown in fig. 1, and outer bow back splice bar 23 and interior bow back splice bar 22 adopt the band iron to bend and form, and the section of band iron is the rectangle, is circular shape material with the section and compares, can further increase with the area of contact of annular cover 1 and protective sheath 3, improves the intensity of the cage body.
The number of the annular sleeves 1 can be 4, 5 or more, and in order to ensure the strength of the cage body, the number of the annular sleeves 1 is at least 5.
The connecting rib 2 and the annular sleeve 1 can be connected through screws, and in order to guarantee high connection strength, the connecting rib 2 is connected with the annular sleeve 1 in a welding mode.
The construction method of the light guide pipe elbow with the reinforcing cage comprises the following steps:
A. the annular sleeve 1 and the connecting ribs 2 are assembled outside the elbow body 10 to form a cage body surrounding the elbow body 10. Because the elbow body 10 is curved and cannot be put into the assembled cage body, the elbow body 10 needs to be assembled on site outside. The internal diameter of annular cover 1 is greater than the external diameter of elbow body 10, and specifically, the internal diameter of annular cover 1 is greater than the external diameter of elbow body 10 about 100mm, guarantees to have sufficient interval between annular cover 1 and the elbow body 10, avoids annular cover 1 and splice bar 2 touching elbow body 10 and lead to the damage of elbow body 10 when assembling.
The number of the annular sleeves 1 is more than 5, and the number of the connecting ribs 2 is generally 4. During assembling, for flanging operation, the lower end of the elbow body 10 can be placed on the horizontal ground or a desktop, the elbow body 10 is fixed by auxiliary positioning equipment, 2 or 3 connecting ribs 2 are welded on an annular sleeve 1, the annular sleeve 1 is located at the end part of the connecting rib 2, the annular sleeve 1 is sleeved outside the elbow body 10, the annular sleeve 1 is moved to the bottom of the elbow body 10, and then the annular sleeve 1 is fixed. Because this annular cover 1 has only welded 2 or 3 splice bars 2, has enough big interval between the splice bar 2, when overlapping the annular cover 1 outside elbow body 10 again, can not produce with elbow body 10 and interfere. And then welding the rest connecting ribs 2 on the annular sleeve 1 at the lower end of the elbow body 10, and finally sleeving other annular sleeves 1 outside the elbow body 10 one by one and welding the other annular sleeves with the connecting ribs 2. This way, the positioning of the annular sheath 1 and the connection ribs 2 can be facilitated.
B. Cutting and blanking are carried out on the thin plate, the thin plate is wrapped on the cage body to form a protective sleeve 3, and the protective sleeve 3 and the cage body form a reinforcing sleeve cage. The thin plate is small in thickness and can be conveniently bent, and the thickness can be 1mm to 3 mm.
C. Drilling an injection hole 31 on the protective sleeve 3, injecting a filling material into the protective sleeve 3 through the injection hole 31, wherein the filling material fills the space between the protective sleeve 3 and the elbow body 10 and connects the protective sleeve 3 and the elbow body 10 into a whole. The filler material forms a filler material layer 32 that firmly connects the protective sleeve 3 with the elbow body 10, ensuring the stability of the elbow body 10. Meanwhile, the filling material layer 32 has a buffer effect, so that the protection effect on the elbow body 10 is further improved.
D. And (3) taking the reinforcing sleeve cage as an inner template, building an outer template 20 outside the reinforcing sleeve cage, and injecting concrete into a space between the inner template and the outer template to obtain a concrete cylinder 30, as shown in fig. 4. The reinforcement cage separates the elbow body 10 from the concrete cylinder 30, so that the elbow body 10 is prevented from being damaged due to direct contact between concrete and the elbow body 10 during pouring, and the safety of the elbow body 10 is ensured. After the concrete is poured, the small vibrating spear is held by hands to vibrate the concrete, or the vibrating spear is leaned against the outer formwork 20, and attached vibration is carried out on the outer side, so that the strength of the concrete cylinder 30 is ensured.
E. And after the concrete cylinder 30 passes through the maintenance period, the outer formwork 20 is detached. Specifically, the outer form 20 is removed when the strength of the concrete cylinder 30 reaches 70% of the design strength.
In the step A, the connecting ribs 2 are positioned on the inner side of the annular sleeve 1;
in the step B, the thin plate can be a stainless steel plate and the like, and preferably, the thin plate is galvanized iron sheet, so that the corrosion resistance, the strength and the cost are high. The galvanized iron sheet is cut according to the distance between two adjacent annular sleeves 1, then the galvanized iron sheet is wrapped on the connecting ribs 2 between the two adjacent annular sleeves 1, and the two ends of the galvanized iron sheet are connected in a welding mode to form the protective sleeve 3.

Claims (8)

1. The light guide pipe elbow with the reinforcing sleeve cage comprises an elbow body (10) and is characterized by further comprising a circular protective sleeve (3), a plurality of circular annular sleeves (1) and a plurality of bent connecting ribs (2), wherein the circular annular sleeves (1) are sleeved outside the elbow body (10), each connecting rib (2) is fixedly connected with each protective sleeve (3), so that the plurality of circular sleeves (1) and the plurality of connecting ribs (2) form a bent cage body in a surrounding mode, and the protective sleeves (3) are wrapped outside the cage body; the protective sleeve (3) is provided with an injection hole (31), and the protective sleeve (3) is connected with the elbow body (10) through a filling material layer (32);
the connecting ribs (2) are fixedly connected with the inner side of the annular sleeve (1).
2. The bend of a light pipe with a reinforcing cage as claimed in claim 1, wherein said protective sheath (3) is provided in plurality, and said protective sheath (3) is fitted over said connecting rib (2) between two adjacent annular sheaths (1).
3. The light pipe bend with a ruggedized cage of claim 1, wherein the annular sleeve (1) is a flat iron sleeve.
4. The light pipe elbow with the reinforced caging of claim 1, wherein the connecting ribs (2) comprise 2 identical waistline connecting ribs (21), 1 outer dorsal connecting rib (23) and 1 inner dorsal connecting rib (22), the outer dorsal connecting rib (23) is located at the maximum radius of the cage body, the inner dorsal connecting rib (22) is located at the minimum radius of the cage body, and the 2 waistline connecting ribs (21) are located at both sides of the cage body.
5. The light pipe elbow with the reinforced caging of claim 4, wherein the fascia is a rebar and the inner and outer arch-back connector bars are flat irons.
6. The light pipe bend with a ruggedized cage of claim 1, wherein the annular sleeve (1) is at least 5.
7. The method of constructing a light pipe elbow with a reinforcing cage as claimed in any one of claims 1 to 6, comprising:
A. the annular sleeve (1) and the connecting ribs (2) are assembled outside the elbow body (10) to form a cage body surrounding the elbow body (10);
B. cutting and blanking are carried out on the thin plate, the thin plate is wrapped on the cage body to form a protective sleeve (3), and the protective sleeve (3) and the cage body form a reinforcing cage;
C. drilling an injection hole (31) in the protective sleeve (3), injecting a filling material into the protective sleeve (3) through the injection hole (31), filling the space between the protective sleeve (3) and the elbow body (10) with the filling material, and connecting the protective sleeve (3) and the elbow body (10) into a whole;
D. taking the reinforcing sleeve cage as an inner template, building an outer template (20) outside the reinforcing sleeve cage, and injecting concrete into a space between the inner template and the outer template to obtain a concrete cylinder (30);
E. and after the concrete cylinder (30) passes through the maintenance period, the outer template (20) is detached.
8. The method of constructing a light-conducting bend with a reinforcing cage as claimed in claim 7,
in the step A, the connecting ribs (2) are positioned on the inner side of the annular sleeve (1);
and in the step B, the thin plate is a galvanized iron sheet, the galvanized iron sheet is cut according to the distance between two adjacent annular sleeves (1), then the galvanized iron sheet is wrapped on the connecting ribs (2) between the two adjacent annular sleeves (1), and the two ends of the galvanized iron sheet are welded and connected to form the protective sleeve (3).
CN201911093454.7A 2019-11-11 2019-11-11 Light guide pipe elbow with reinforcing sleeve cage and construction method thereof Active CN110778970B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911093454.7A CN110778970B (en) 2019-11-11 2019-11-11 Light guide pipe elbow with reinforcing sleeve cage and construction method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911093454.7A CN110778970B (en) 2019-11-11 2019-11-11 Light guide pipe elbow with reinforcing sleeve cage and construction method thereof

Publications (2)

Publication Number Publication Date
CN110778970A CN110778970A (en) 2020-02-11
CN110778970B true CN110778970B (en) 2020-10-16

Family

ID=69390582

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911093454.7A Active CN110778970B (en) 2019-11-11 2019-11-11 Light guide pipe elbow with reinforcing sleeve cage and construction method thereof

Country Status (1)

Country Link
CN (1) CN110778970B (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101458358B (en) * 2007-12-13 2011-12-07 英华达股份有限公司 Multi-axial light pipe module
CN201803304U (en) * 2010-08-24 2011-04-20 茂杰光电有限公司 High-efficiency sunlight illumination light guide system
CN203230960U (en) * 2013-04-27 2013-10-09 北京佰德阳光科技有限公司 Closing ring for light guide pipe
CN205416350U (en) * 2015-12-10 2016-08-03 上海信耀电子有限公司 Plastic light pipe
CN105971184B (en) * 2016-05-26 2019-02-22 长沙理工大学 A kind of light-focusing type light guide concrete structural unit and light transmission wall construction method
CN209112605U (en) * 2018-10-17 2019-07-16 江苏长风海洋装备制造有限公司 A kind of pedestal support device for integrated form set cage
CN208764857U (en) * 2018-10-23 2019-04-19 北京佰德阳光科技有限公司 A kind of light pipe hardened system
CN110130387B (en) * 2019-04-29 2021-04-13 南通泰胜蓝岛海洋工程有限公司 Construction process of integrated type sleeve cage
CN210424843U (en) * 2019-11-11 2020-04-28 中国十九冶集团有限公司 Reinforcing sleeve cage of light pipe elbow and light pipe elbow

Also Published As

Publication number Publication date
CN110778970A (en) 2020-02-11

Similar Documents

Publication Publication Date Title
JP2016169493A (en) Structure and method for reinforcing existing concrete structure
CN111042185A (en) Construction method of basement raft foundation with tower crane foundation
CN110778970B (en) Light guide pipe elbow with reinforcing sleeve cage and construction method thereof
JP6518450B2 (en) Method and structure for reinforcing metal pipe column
CN210424843U (en) Reinforcing sleeve cage of light pipe elbow and light pipe elbow
KR100989775B1 (en) Pier using FRP Tube filled with Concrete, Connection Structure Foundation and the Same
KR100830928B1 (en) Electric wire support pipe of indoor wall for building
CN206769023U (en) A kind of outer wall of basement waterproof construction
CN214614049U (en) Prestressed anchor cable structure
KR100944335B1 (en) Waterproof plate sleeve for concrete construct
JP2009024479A (en) Strut of snowslide/rock fall protective body
JP5022150B2 (en) Tunnel merge structure and method for constructing tunnel merge structure
JP2006200271A (en) Joining structure and joining method
CN207555004U (en) PCCP pipeline prestressed reinforcement structures
JP4243889B2 (en) Synthetic pipe
CN210395453U (en) Basement exposes tubular pile protection architecture
CN201053555Y (en) Prestressed steel barrel concrete manhole tube
CN107304566B (en) A kind of detachable soil nailing wall board structure
CN103485465A (en) CBM inner mould and construction process for CBM high-strength thin-walled tube cast-in-place hollow floorslab
CN212984174U (en) Concrete structure of petrochemical engineering project building of antidetonation type
JPH10169885A (en) Method for protecting cable, and protective pipe for cable
CN218116429U (en) Prestressed pipe fitting for improving crack resistance of concrete
CN210195003U (en) Prefabricated superimposed sheet floor electric wiring structure
CN211622676U (en) Pipe fixing device for mounting embedded pipe
CN215170030U (en) Underground excavation underground passage mixes and inlays cover and encircle reinforced structure

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