CN113417224B - Rotary crosswind-proof barrier for highway - Google Patents

Rotary crosswind-proof barrier for highway Download PDF

Info

Publication number
CN113417224B
CN113417224B CN202110698024.9A CN202110698024A CN113417224B CN 113417224 B CN113417224 B CN 113417224B CN 202110698024 A CN202110698024 A CN 202110698024A CN 113417224 B CN113417224 B CN 113417224B
Authority
CN
China
Prior art keywords
sound
rotary
absorbing
blade
crosswind
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
CN202110698024.9A
Other languages
Chinese (zh)
Other versions
CN113417224A (en
Inventor
王宏伟
李保俊
赵第阳
张影
王宁
王红梅
李晓伟
李凤
杨汉臣
赵队家
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.)
Beijing Hualuxiang Transportation Technology Co ltd
Original Assignee
Beijing Hualuxiang Transportation 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 Beijing Hualuxiang Transportation Technology Co ltd filed Critical Beijing Hualuxiang Transportation Technology Co ltd
Priority to CN202110698024.9A priority Critical patent/CN113417224B/en
Publication of CN113417224A publication Critical patent/CN113417224A/en
Application granted granted Critical
Publication of CN113417224B publication Critical patent/CN113417224B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/06Anti-dazzle arrangements ; Securing anti-dazzle means to crash-barriers
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0011Plank-like elements
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0023Details, e.g. foundations

Abstract

The invention belongs to the technical field of highway auxiliary facilities, and relates to a rotary highway crosswind-proof barrier which comprises a square steel frame arranged on a roadbed foundation, wherein the whole square steel frame is rectangular, a plurality of groups of sound-absorbing rotary sound-absorbing fan blade groups are arranged in parallel in the plane of the square steel frame, and the rotating tracks of two adjacent groups of sound-absorbing rotary sound-absorbing fan blade groups are tangent. The rotary type highway crosswind-proof barrier provided by the invention can avoid damage to the structure of a bridge or a wind barrier due to large wind load coefficient, and has the effects of wind resistance, shading, sound absorption and the like.

Description

Rotary crosswind-proof barrier for highway
Technical Field
The invention belongs to the technical field of highway accessory facilities, relates to a crosswind prevention barrier, and particularly relates to a rotary type highway crosswind prevention barrier.
Background
The transverse wind barrier prevention is not applied in a large scale in highway bridge engineering at present. Especially, cross-country-level wetland protection areas and cross wind at tunnel portals cause great potential safety hazards to vehicle safety, but the calculation of the wind load coefficient is not enough after the area of the existing wind barrier is increased, and the large-area use can cause great damage to the bridge and the structure of the wind barrier. In the prior art, when wind passes through a wind barrier consisting of wind baffles, upper and lower disturbing air flows are formed, the wind speed of incoming wind is reduced, and the kinetic energy of the incoming wind is greatly lost; reduce the turbulence of wind and eliminate the vortex of the incoming wind. The surface is provided with holes, so that the wind speed of incoming wind is reduced, but when high-grade wind is encountered, the structure of the bridge or the wind barrier can be damaged.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides the rotary type highway crosswind prevention barrier which can avoid the damage to the structure of a bridge or a wind barrier caused by large wind load coefficient and has the effects of wind resistance, shading, sound absorption and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a crosswind barrier is prevented to rotation type highway which characterized in that: the rotation type highway is prevented crosswind protective screen is including setting up the square steel frame on the roadbed basis, the whole rectangle that is of square steel frame sets up the multiunit in parallel in square steel frame place plane and inhales the rotatory sound fan blade group that inhales of sound, and adjacent two sets of rotatory rotation tracks of inhaling the sound fan blade group of sound are tangent.
Preferably, the sound-absorbing rotary sound-absorbing fan blade group adopted by the invention comprises a first rotary sound-absorbing blade, a magnetic strip and a positioning rod; the first rotary sound-absorbing blade is arranged on the square steel frame through a positioning rod and rotates along the axial direction of the positioning rod; the outer contour of the first rotary sound-absorbing blade is provided with a magnetic strip, and in a natural state, the rotating trajectories of the two adjacent groups of sound-absorbing rotary sound-absorbing blade groups are tangent and mutually attracted through the magnetic strip.
Preferably, the sound-absorbing rotary sound-absorbing blade group used in the present invention further includes a second rotary sound-absorbing blade and a third rotary sound-absorbing blade, which are provided on the positioning rod and have the same structure as the first rotary sound-absorbing blade; the first rotary sound-absorbing blade, the second rotary sound-absorbing blade and the third rotary sound-absorbing blade are mutually inserted to form an integral structure; the overall structure that first rotatory sound blade, the rotatory sound blade of inhaling of second and the rotatory sound blade of inhaling of third formed rotates around the axial of locating lever.
Preferably, the first, second, and third rotary sound-absorbing blades used in the present invention are made of glass fiber reinforced plastic.
Preferably, the first, second, and third rotary sound absorbing blades used in the present invention are each provided with a sound wave reflecting block on the surface thereof.
Preferably, the sound wave reflecting block used in the present invention is formed by press molding or cast molding.
Preferably, the sound wave reflecting blocks used in the present invention are provided in plurality, and the sound wave reflecting blocks are disposed uniformly or non-uniformly on the surfaces of the first, second, and third rotary sound absorbing blades.
Preferably, the sound-absorbing rotary sound-absorbing fan blade group adopted by the invention further comprises a mute bearing which is sleeved on the positioning rod and is arranged at the end part of the first rotary sound-absorbing fan blade.
Preferably, the rotary type highway crosswind prevention barrier adopted by the invention also comprises an embedded part arranged between the roadbed foundation and the square steel frame; the square steel frame is fixed on the roadbed foundation through embedded parts.
Preferably, the embedded part adopted by the invention comprises an anchor rod and a supporting part; the support piece is integrally T-shaped; the square steel frame is arranged on the supporting piece; the supporting piece is anchored on the roadbed foundation through an anchor rod.
The invention has the advantages that:
the invention provides a rotary type highway crosswind-proof barrier which comprises a square steel frame arranged on a roadbed foundation, wherein the whole square steel frame is rectangular, a plurality of sound-absorbing rotary sound-absorbing fan blade groups are arranged in parallel in a plane where the square steel frame is located, and the rotating tracks of two adjacent sound-absorbing rotary sound-absorbing fan blade groups are tangent. The invention adopts the manufacturing of the upper and lower surfaces of the front and back surfaces of the glass steel plates by pressing modules or pouring process to achieve the effects of sound absorption, sound wave refraction and the like, a plurality of glass steel plates are inserted into the edges of the blades to form a fan blade shape, positioning components are arranged at two ends of the blades and are formed by combining a mute bearing and a positioning piece to form a single rotary wind-guiding and sound-absorbing fan blade group, finally, a plurality of sound-absorbing and rotary sound-absorbing fan blade groups are connected and combined into a rotary wind-resisting, light-shading and sound-absorbing fan screen by special square steel, and finally, the fan screen is fixed with an anti-collision wall or a roadbed foundation through an embedded part. When wind is blown, the rotating wind-guiding sound-absorbing fan blade group rotates along the wind direction from different directions to lead the wind out or reduce the wind speed of the incoming wind; under the windless state, the fan blades are automatically closed under the action of magnetic force. After the treatment, the rotary type achieves the wind-resistant effect; the upper and lower surfaces of the front and back surfaces of the glass steel plate are manufactured by pressing modules or pouring process, so that the effects of sound absorption and sound wave decomposition are achieved; the combination of a plurality of rotary sound-absorbing fan blades achieves the shading effect. The invention solves the problem that the traditional sound barrier has large area, avoids the damage of strong wind to the bridge or the structure of the wind barrier, and fills the blank of the traditional wind barrier form.
Drawings
FIG. 1 is a schematic structural view of a rotary highway crosswind barrier according to the present invention;
FIG. 2 is a schematic top view (enlarged) of a rotary highway crosswind barrier according to the present invention;
FIG. 3 is a schematic view (enlarged) of the structure of a sound-absorbing rotary sound-absorbing blade group used in the present invention;
fig. 4 is a schematic front view (enlarged) of a sound-absorbing rotary sound-absorbing blade group used in the present invention;
FIG. 5 is a schematic view of a sound absorbing rotating sound absorbing blade assembly employed in the present invention in particular installed;
wherein:
1-square steel frame; 2-sound-absorbing rotary sound-absorbing fan blade group; 21-a first rotating sound absorbing blade; 22-a second rotating sound absorbing blade; 23-a third rotating sound absorbing blade; 24-a magnetic strip; 25-positioning rods; 26-a mute bearing; 27-a sound wave reflection block; 3-embedded parts; 31-anchor rod; 32-a support member; 4-roadbed foundation.
Detailed Description
Referring to fig. 1 and 2, the invention provides a rotary type highway crosswind prevention barrier, which comprises a square steel frame 1 arranged on a roadbed foundation 4, wherein the square steel frame 1 is rectangular as a whole, a plurality of groups of sound-absorbing rotary sound-absorbing fan blade sets 2 are arranged in parallel in the plane of the square steel frame 1, and the rotation tracks of the two adjacent groups of sound-absorbing rotary sound-absorbing fan blade sets 2 are tangent. Referring to fig. 3, the sound-absorbing rotary sound-absorbing blade group 2 includes a first rotary sound-absorbing blade 21, a magnetic bar 24, and a positioning rod 25; the first rotary sound-absorbing blade 21 is arranged on the square steel frame 1 through a positioning rod 25 and rotates along the axial direction of the positioning rod 25; the outer contour of the first rotary sound-absorbing blade 21 is provided with a magnetic strip 24, and in a natural state, the rotation tracks of the two adjacent sound-absorbing rotary sound-absorbing blade groups 2 are tangent and mutually attracted through the magnetic strip 24. When wind is blown, the rotating wind-guiding sound-absorbing fan blade group rotates along the wind direction from different directions to lead the wind out or reduce the wind speed of the incoming wind; in the windless state, the plurality of sound-absorbing rotary sound-absorbing blade groups 2 are automatically closed by attracting each other by the magnetic strips 24. After the treatment, the rotary type achieves the wind-resistant effect.
Referring to fig. 3, the sound-absorbing rotary sound-absorbing blade group 2 according to the present invention preferably further includes a second rotary sound-absorbing blade 22 and a third rotary sound-absorbing blade 23 that are provided on the positioning rod 25 and have the same configuration as the first rotary sound-absorbing blade 21; the first rotary sound-absorbing blade 21, the second rotary sound-absorbing blade 22 and the third rotary sound-absorbing blade 23 are inserted into each other to form an integral structure; the entire structure formed by the first, second, and third rotary sound absorbing blades 21, 22, and 23 rotates in the axial direction of the positioning rod 25. The first, second, and third rotary sound-absorbing blades 21, 22, and 23 are each made of a glass fiber reinforced plastic sheet. The first rotary sound-absorbing blade 21, the second rotary sound-absorbing blade 22 and the third rotary sound-absorbing blade 23 form an integral structure, and the multiple sound-absorbing rotary sound-absorbing blade sets 2 are convenient to absorb through the magnetic strips 24 in a windless state.
Referring to fig. 4, in order to achieve the effects of sound absorption and enhanced sound wave refraction, sound wave reflecting blocks 27 are disposed on the surfaces of the first, second, and third rotary sound-absorbing blades 21, 22, and 23. The sound wave reflection block 27 is formed by press molding or casting. The sound wave reflecting blocks 27 are provided in plurality, and the sound wave reflecting blocks 27 are provided uniformly or non-uniformly on the surfaces of the first rotating sound-absorbing blade 21, the second rotating sound-absorbing blade 22, and the third rotating sound-absorbing blade 23. The sound-absorbing rotary sound-absorbing blade group 2 further includes a mute bearing 26 which is fitted around the positioning rod 25 and is disposed at the end of the first rotary sound-absorbing blade 21.
Referring to fig. 5, in order to facilitate fixing, the rotary type highway crosswind prevention barrier provided by the invention further comprises embedded parts 3 arranged between a roadbed foundation 4 and the square steel frame 1; the square steel frame 1 is fixed on a roadbed foundation 4 through embedded parts 3. The embedded part 3 comprises an anchor rod 31 and a support part 32; the support member 32 is generally T-shaped; the square steel frame 1 is placed on the support member 32; the support members 32 are anchored to the foundation 4 by anchor rods 31.
When the wind-resistant rotary sound-absorbing fan blade set is used specifically, the rotary sound-absorbing fan blade set 2 achieves the wind-resistant effect; the upper and lower surfaces of the front and back surfaces of the glass steel plate are manufactured by pressing modules or pouring process, so that the effects of sound absorption and sound wave decomposition are achieved; the combination of a plurality of rotary sound-absorbing fan blades achieves the shading effect, the problem that the traditional sound barrier is large in area is solved, the damage of strong wind to a bridge or the structure of the wind barrier is avoided, and the blank of the traditional wind barrier is made up.

Claims (7)

1. The utility model provides a crosswind barrier is prevented to rotation type highway which characterized in that: the rotary type highway crosswind prevention barrier comprises a square steel frame (1) arranged on a roadbed foundation (4), the whole square steel frame (1) is rectangular, a plurality of groups of sound-absorbing rotary sound-absorbing fan blade sets (2) are arranged in parallel in the plane of the square steel frame (1), and the rotation tracks of two adjacent groups of sound-absorbing rotary sound-absorbing fan blade sets (2) are tangent; the sound-absorbing rotary sound-absorbing fan blade group (2) comprises a first rotary sound-absorbing blade (21), a second rotary sound-absorbing blade (22), a third rotary sound-absorbing blade (23), a magnetic strip (24) and a positioning rod (25), which are arranged on the positioning rod (25) and have the same structure; the first rotary sound-absorbing blade (21), the second rotary sound-absorbing blade (22) and the third rotary sound-absorbing blade (23) are arranged on the square steel frame (1) through positioning rods (25); the first rotary sound-absorbing blade (21), the second rotary sound-absorbing blade (22) and the third rotary sound-absorbing blade (23) are mutually inserted to form an integral structure, and the formed integral structure rotates around the axial direction of the positioning rod (25); the surfaces of the first rotary sound-absorbing blade (21), the second rotary sound-absorbing blade (22) and the third rotary sound-absorbing blade (23) are provided with sound wave reflecting blocks (27); the positioning rod (25) is vertically arranged; the outer contour of the first rotary sound-absorbing blade (21), the second rotary sound-absorbing blade (22) and the third rotary sound-absorbing blade (23) is provided with a magnetic strip (24), the rotating tracks of the adjacent two groups of sound-absorbing rotary sound-absorbing blade sets (2) are tangent in a windy state, and the rotary sound-absorbing blades of the adjacent two groups of sound-absorbing rotary sound-absorbing blade sets (2) are mutually attracted through the magnetic strip (24) and automatically closed in a no-wind state.
2. The rotary highway crosswind barrier according to claim 1, wherein: the first rotary sound-absorbing blade (21), the second rotary sound-absorbing blade (22) and the third rotary sound-absorbing blade (23) are all made of glass fiber reinforced plastic plates.
3. The rotary highway crosswind barrier according to claim 1, wherein: the sound wave reflection block (27) is formed by pressing or pouring.
4. The rotary highway crosswind barrier according to claim 3, wherein: the sound wave reflection blocks (27) are multiple, and the sound wave reflection blocks (27) are uniformly distributed or non-uniformly distributed on the surfaces of the first rotating sound absorption blade (21), the second rotating sound absorption blade (22) and the third rotating sound absorption blade (23).
5. The rotary highway crosswind barrier according to claim 1, wherein: the sound-absorbing rotary sound-absorbing blade group (2) further comprises a mute bearing (26) which is sleeved on the positioning rod (25) and is arranged at the end part of the first rotary sound-absorbing blade (21).
6. A rotary highway crosswind prevention barrier according to any of claims 1-5, wherein: the rotary type male
The road cross-wind prevention barrier also comprises an embedded part (3) arranged between the road foundation (4) and the square steel frame (1); the square steel frame (1) is fixed on the roadbed foundation (4) through the embedded part (3).
7. The rotary highway crosswind barrier according to claim 6, wherein: the embedded part (3) comprises an anchor rod (31) and a support part (32); the support piece (32) is integrally T-shaped; the square steel frame (1) is arranged on the supporting piece (32); the supporting element (32) is anchored to the foundation (4) by means of anchor rods (31).
CN202110698024.9A 2021-06-23 2021-06-23 Rotary crosswind-proof barrier for highway Active CN113417224B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110698024.9A CN113417224B (en) 2021-06-23 2021-06-23 Rotary crosswind-proof barrier for highway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110698024.9A CN113417224B (en) 2021-06-23 2021-06-23 Rotary crosswind-proof barrier for highway

Publications (2)

Publication Number Publication Date
CN113417224A CN113417224A (en) 2021-09-21
CN113417224B true CN113417224B (en) 2023-01-13

Family

ID=77717537

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110698024.9A Active CN113417224B (en) 2021-06-23 2021-06-23 Rotary crosswind-proof barrier for highway

Country Status (1)

Country Link
CN (1) CN113417224B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274884A1 (en) * 1986-12-18 1988-07-20 G. Maunsell & Partners A windshield for an exposed structure
JPH09209316A (en) * 1996-02-05 1997-08-12 Sekisui Jushi Co Ltd Soundproof wall
KR20040025280A (en) * 2002-09-19 2004-03-24 박정근 Rotaton type soundproofing wall
CN204435246U (en) * 2015-02-03 2015-07-01 青海富腾生态科技有限公司 A kind of road noise-reduction barrier
CN206495145U (en) * 2016-09-07 2017-09-15 中铁第四勘察设计院集团有限公司 A kind of platform sound-absorbing wall
CN108867422A (en) * 2018-08-13 2018-11-23 中南大学 A kind of multi-functional sound of the wind barrier of environment-friendly and energy-efficient
CN110396951A (en) * 2019-08-05 2019-11-01 江苏华之杰环境科技有限公司 A kind of bayonet townhouse type lightweight echo absorption barrier with double-layer hollow structure

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274884A1 (en) * 1986-12-18 1988-07-20 G. Maunsell & Partners A windshield for an exposed structure
JPH09209316A (en) * 1996-02-05 1997-08-12 Sekisui Jushi Co Ltd Soundproof wall
KR20040025280A (en) * 2002-09-19 2004-03-24 박정근 Rotaton type soundproofing wall
CN204435246U (en) * 2015-02-03 2015-07-01 青海富腾生态科技有限公司 A kind of road noise-reduction barrier
CN206495145U (en) * 2016-09-07 2017-09-15 中铁第四勘察设计院集团有限公司 A kind of platform sound-absorbing wall
CN108867422A (en) * 2018-08-13 2018-11-23 中南大学 A kind of multi-functional sound of the wind barrier of environment-friendly and energy-efficient
CN110396951A (en) * 2019-08-05 2019-11-01 江苏华之杰环境科技有限公司 A kind of bayonet townhouse type lightweight echo absorption barrier with double-layer hollow structure

Also Published As

Publication number Publication date
CN113417224A (en) 2021-09-21

Similar Documents

Publication Publication Date Title
CN201459616U (en) Road sand barrier
CN101377387B (en) Noise reducing and anti-freezing device outside power plant cooling tower
CN107110112A (en) wind turbine blade with trailing edge flap
CN106192786B (en) Wind energy utilization type off-load sound barrier
CN113417224B (en) Rotary crosswind-proof barrier for highway
CN104404894A (en) High-speed rail bridge wind shielding structure wind shielding plate
DE112021003476T5 (en) Drag reduction structure, blade and manufacturing method for a shark gill blade of a wind turbine
CN105256729A (en) Wind-gathering windproof sand retaining wall
CN208685476U (en) A kind of dedicated sound barrier of high-speed rail station main track
CN205839715U (en) A kind of sewage blocking device for power station intake
CN201033956Y (en) Road air partition
CN207073328U (en) A kind of road enclosing
CN209114352U (en) A kind of road sound insulation fence
CN209211297U (en) A kind of road roadlock sand resistance snow device
CN211475776U (en) Hail-suppression solar LED street lamp
CN209307887U (en) Bilateral wind-engaging off-load environmental protection sound barrier
CN203125780U (en) Die for manufacturing multi-size wind driven generator blades
CN206655213U (en) A kind of large area preventing and fixing sand fence
CN2372366Y (en) Telescopic guard bar of central isolation band gate of highway
CN215801147U (en) Water guide ventilation subtracts year sound barrier
CN205064187U (en) Wind power generation set with mechanism of keeping out wind
CN201778279U (en) Vortex-induced vibration suppression lightweight guide plate of steel truss cable-stayed bridge
CN208985555U (en) A kind of adjustable wind-proof direction board
CN216359665U (en) Road sound barrier mould
CN205805097U (en) A kind of road surface security monitoring bar

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
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Wang Hongwei

Inventor after: Zhao Duijia

Inventor after: Li Baojun

Inventor after: Zhao Diyang

Inventor after: Zhang Ying

Inventor after: Wang Ning

Inventor after: Wang Hongmei

Inventor after: Li Xiaowei

Inventor after: Li Feng

Inventor after: Yang Hanchen

Inventor before: Wang Hongwei

Inventor before: Zhao Duijia

Inventor before: Li Baojun

Inventor before: Zhao Diyang

Inventor before: Zhang Ying

Inventor before: Wang Ning

Inventor before: Wang Hongmei

Inventor before: Li Xiaowei

Inventor before: Li Feng

Inventor before: Yang Hancheng

GR01 Patent grant
GR01 Patent grant