CN111719749B - High-air-tightness transverse connection structure for curtain wall - Google Patents
High-air-tightness transverse connection structure for curtain wall Download PDFInfo
- Publication number
- CN111719749B CN111719749B CN202010679457.5A CN202010679457A CN111719749B CN 111719749 B CN111719749 B CN 111719749B CN 202010679457 A CN202010679457 A CN 202010679457A CN 111719749 B CN111719749 B CN 111719749B
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- fixedly connected
- curtain wall
- curtain
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- 238000007789 sealing Methods 0.000 claims abstract description 35
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000003292 glue Substances 0.000 claims abstract description 3
- 238000009434 installation Methods 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000032683 aging Effects 0.000 abstract description 3
- 238000007664 blowing Methods 0.000 abstract 1
- 239000004568 cement Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
Abstract
The invention discloses a high-air-tightness transverse connecting structure for a curtain wall, which comprises a curtain wall plate, wherein a vertical protection plate is arranged on the side surface of the curtain wall plate, a horizontal protection plate is arranged on the upper surface of the curtain wall plate, stepped holes are formed in the front surfaces of the vertical protection plate and the horizontal protection plate, locking screws are inserted into the inner wall of each stepped hole, a protection cover is lapped on the inner wall of each stepped hole and is arranged on the front surface of each locking screw, a vertical connecting column is arranged on the back surface of each vertical protection plate, and a positioning rod is fixedly connected to the top end of each vertical connecting column. This curtain is with high gas tightness transverse connection structure through setting up vertical guard plate and horizontal guard plate, tightly presses first sealing strip and second sealing strip on the surface of curtain board, prevents long-time wind-blowing sun-curing, appears ageing phenomenon on stick up the limit, glues through setting up glass, closely knit space between the curtain board to hug closely with first sealing strip and second sealing strip, thereby realize the effect of high gas tightness.
Description
Technical Field
The invention relates to the technical field of curtain wall connecting structures, in particular to a high-air-tightness transverse connecting structure for a curtain wall.
Background
The curtain wall is an outer wall enclosure of a building, is a light wall with a decorative effect commonly used by modern large and high-rise buildings, consists of a panel and a supporting structure system, can have certain displacement capacity or certain deformation capacity relative to a main structure, and is formed by connecting a plurality of curtain wall plates together through a connecting structure.
However, the existing commonly used curtain wall connecting structure has the defect of poor sealing performance, so that the curtain wall has the phenomenon of rainwater leakage, and therefore, the invention provides the high-air-tightness transverse connecting structure for the curtain wall.
Disclosure of Invention
The invention aims to provide a high-air-tightness transverse connecting structure for a curtain wall, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a high-airtightness transverse connection structure for a curtain wall comprises a curtain wall plate, wherein a vertical protection plate is arranged on the side surface of the curtain wall plate, a horizontal protection plate is arranged on the upper surface of the curtain wall plate, step holes are formed in the front surfaces of the vertical protection plate and the horizontal protection plate, locking screws are inserted into the inner wall of each step hole, a protection cover is lapped on the inner wall of each step hole and is arranged on the front surface of each locking screw, a vertical connecting column is arranged on the back surface of each vertical protection plate, a positioning rod is fixedly connected to the top end of each vertical connecting column, an external thread groove is formed in one end, away from the top end of each vertical connecting column, of each positioning rod, a locking nut is connected to the surface of each external thread groove in a threaded manner, a first connector and a second connector are respectively and rotatably connected to the surface of each positioning rod, a left installation crossbeam is fixedly connected to the side surface of each first connector, the side surface of the second connector is fixedly connected with a right mounting cross beam, the side surfaces of the left mounting cross beam and the right mounting cross beam are respectively provided with a T-shaped sliding groove, the inner wall of the T-shaped sliding groove is connected with a positioning block in a sliding manner, the upper surface of the positioning block is fixedly connected with a connecting block, the upper surface of the connecting block is provided with a rectangular placing groove, the inner wall of the rectangular placing groove is lapped with the surface of the curtain wall plate, the back surfaces of the left mounting cross beam and the right mounting cross beam are respectively and fixedly connected with a supporting rod, one end of the supporting rod, far away from the back surfaces of the left mounting cross beam and the right mounting cross beam, is fixedly connected with a mounting plate, the front surface of the mounting plate is fixedly connected with a reinforcing rod, one end of the reinforcing rod, far away from the front surface of the mounting plate, is fixedly connected with the lower surface of the supporting rod, the front surface of the mounting plate is provided with a through hole, a fixing bolt is inserted into the inner wall of the through hole, and the back surface of the vertical protection plate is fixedly connected with a first sealing strip, and the back surface of the horizontal protection plate is fixedly connected with a second sealing strip.
Preferably, threaded holes are formed in the front face of the vertical connecting column, the number of the threaded holes is two, the vertical protection plate is fixedly connected with the front face of the vertical connecting column through locking screws, and the horizontal protection plate is fixedly connected with the front faces of the left mounting cross beam and the right mounting cross beam through locking screws respectively.
Preferably, the quantity of curtain board is a plurality of, the quantity of first sealing strip is two, two the back of first sealing strip respectively with the positive overlap joint of the curtain board of vertical spliced pole both sides.
Preferably, the quantity of left side installation crossbeam is two, two left side installation crossbeam sets up respectively in the top and the bottom of vertical spliced pole, two the opposite face of left side installation crossbeam is parallel to each other, the curtain board sets up the centre at two left side installation crossbeams.
Preferably, the quantity of right side installation crossbeam is two, two the right side installation crossbeam sets up respectively in the top and the bottom of vertical spliced pole, two the opposite face of right side installation crossbeam is parallel to each other, the curtain board sets up the centre at two right side installation crossbeams.
Preferably, the number of the locking nuts is two, the two locking nuts are respectively arranged at the top end and the bottom end of the vertical connecting column, and the surface of each locking nut is fixedly connected with an antirust coating.
Preferably, the first sealing strip and the second sealing strip are made of rubber, and the vertical protection plate is fixedly connected with glass rubber with the opposite surface of the vertical connecting column.
Preferably, the material of horizontal guard plate and vertical guard plate is the aluminum alloy, the material of protective cover is plastics, the specification and size and the step hole looks adaptation of protective cover.
Preferably, the guiding hole has been seted up to the side of vertical spliced pole, the inner wall sliding connection of guiding hole has the guide bar, the surface cover of guide bar is equipped with pressure spring, the one end fixedly connected with pressure strip of vertical spliced pole side is kept away from to the guide bar, pressure spring's both ends respectively with the side of vertical spliced pole and the side fixed connection of pressure strip, the one side of keeping away from the guide bar of pressure strip and the side overlap joint of curtain board.
Advantageous effects
The invention provides a high-air-tightness transverse connecting structure for a curtain wall, which has the following beneficial effects:
1. this curtain is with high gas tightness transverse connection structure through setting up vertical guard plate and horizontal guard plate, tightly presses first sealing strip and second sealing strip on the surface of curtain board, prevents long-time wind-blown sunshine, and the phenomenon on ageing stick up limit appears, glues through setting up glass, closely knit curtain board and the space between the connection structure to hug closely with first sealing strip and second sealing strip, thereby realize the effect of high gas tightness.
2. This curtain is with high gas tightness transverse connection structure, through setting up locating piece and connecting block, during the installation curtain board, utilize connecting block joint curtain board, it is all more convenient to make the installation with dismantle, through setting up pressure spring and pressure strip, provides a pressure in opposite directions for two curtain boards, reduces the clearance between the curtain board, simultaneously, makes the curtain board fixed more firm to realize simple to operate and firm effect.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side sectional view of a left mounting beam;
FIG. 4 is a schematic structural view of a vertical connecting column in elevation;
FIG. 5 is a schematic top view of the vertical connecting column.
In the figure: 1 curtain board, 2 vertical guard plates, 3 horizontal guard plates, 4 locking screws, 5 protective covers, 6 vertical connecting posts, 7 locating rods, 8 locking nuts, 9 first connecting heads, 10 second connecting heads, 11 left installation beams, 12 right installation beams, 13 locating blocks, 14 connecting blocks, 15 supporting rods, 16 mounting plates, 17 reinforcing rods, 18 fixing bolts, 19 first sealing strips, 20 second sealing strips, 21 glass cement, 22 guide rods, 23 compression springs and 24 compression plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a curtain is with high gas tightness transverse connection structure, including curtain board 1, curtain board 1's side is provided with vertical guard plate 2, curtain board 1's upper surface is provided with horizontal guard plate 3, the material of horizontal guard plate 3 and vertical guard plate 2 is the aluminum alloy, the step hole has all been seted up in vertical guard plate 2 and horizontal guard plate 3's front, the inner wall in step hole is inserted and is equipped with locking screw 4, the inner wall overlap joint in step hole has protective cover 5, protective cover 5 sets up the front at locking screw 4, protective cover 5's material is plastics, protective cover 5's specification and dimension and step hole looks adaptation, vertical guard plate 2's the back is provided with vertical spliced pole 6, threaded hole has been seted up in vertical spliced pole 6's front, the quantity of screw hole is two, vertical guard plate 2 passes through locking screw 4 and vertical spliced pole 6 front fixed connection.
The top end of the vertical connecting column 6 is fixedly connected with a positioning rod 7, one end of the positioning rod 7, which is far away from the top end of the vertical connecting column 6, is provided with an external thread groove, the surface of the external thread groove is in threaded connection with two locking nuts 8, the two locking nuts 8 are respectively arranged at the top end and the bottom end of the vertical connecting column 6, the surfaces of the two locking nuts 8 are respectively and fixedly connected with an antirust coating, the surface of the positioning rod 7 is respectively and rotatably connected with a first connector 9 and a second connector 10, the side surface of the first connector 9 is fixedly connected with a left mounting crossbeam 11, a horizontal protection plate 3 is respectively and fixedly connected with the front surfaces of the left mounting crossbeam 11 and a right mounting crossbeam 12 through locking screws 4, the number of the left mounting crossbeams 11 is two, the two left mounting crossbeams 11 are respectively arranged at the top end and the bottom end of the vertical connecting column 6, and the opposite surfaces of the two left mounting crossbeams 11 are parallel to each other, the curtain wall panel 1 is disposed in the middle of the two left mounting beams 11.
The side surface of the second connector 10 is fixedly connected with a right mounting beam 12, the number of the right mounting beams 12 is two, the two right mounting beams 12 are respectively arranged at the top end and the bottom end of the vertical connecting column 6, the opposite surfaces of the two right mounting beams 12 are parallel to each other, the curtain wall board 1 is arranged between the two right mounting beams 12, the side surfaces of the left mounting beam 11 and the right mounting beam 12 are respectively provided with a T-shaped chute, the inner wall of the T-shaped chute is connected with a positioning block 13 in a sliding manner, the upper surface of the positioning block 13 is fixedly connected with a connecting block 14, the upper surface of the connecting block 14 is provided with a rectangular placing groove, the inner wall of the rectangular placing groove is lapped with the surface of the curtain wall board 1, the back surfaces of the left mounting beam 11 and the right mounting beam 12 are respectively and fixedly connected with a supporting rod 15, one end of the supporting rod 15 far away from the back surfaces of the left mounting beam 11 and the right mounting beam 12 is fixedly connected with a mounting plate 16, and the front surface of the mounting plate 16 is fixedly connected with a reinforcing rod 17, the end of the reinforcing bar 17 remote from the front face of the mounting plate 16 is fixedly connected to the lower surface of the support bar 15.
The front surface of the mounting plate 16 is provided with through holes, fixing bolts 18 are inserted into the inner walls of the through holes, the back surfaces of the vertical protection plates 2 are fixedly connected with first sealing strips 19, the number of the curtain wall plates 1 is multiple, the number of the first sealing strips 19 is two, the back surfaces of the two first sealing strips 19 are respectively lapped with the front surfaces of the curtain wall plates 1 on two sides of the vertical connection column 6, the back surface of the horizontal protection plate 3 is fixedly connected with second sealing strips 20, the first sealing strips 19 and the second sealing strips 20 are made of rubber, the opposite surfaces of the vertical protection plates 2 and the vertical connection column 6 are fixedly connected with glass cement 21, the first sealing strips 19 and the second sealing strips 20 are tightly pressed on the surfaces of the curtain wall plates 1 through the arrangement of the vertical protection plates 2 and the horizontal protection plates 3, the phenomenon of aging and edge warping is prevented from being exposed to the sun due to long-time wind, and the arrangement of the glass cement 21 are used for compacting gaps between the curtain wall plates 1 and the connection structure, and closely attached to the first sealing tape 19 and the second sealing tape 20, thereby achieving an effect of high airtightness.
The guiding hole has been seted up to the side of vertical spliced pole 6, the inner wall sliding connection of guiding hole has guide bar 22, the surface cover of guide bar 22 is equipped with pressure spring 23, the one end fixedly connected with pressure strip 24 of vertical spliced pole 6 side is kept away from to guide bar 22, pressure spring 23's both ends respectively with vertical spliced pole 6's side and pressure strip 24's side fixed connection, the one side and the side overlap joint of curtain board 1 of keeping away from guide bar 22 of pressure strip 24, through setting up locating piece 13 and connecting block 14, when installing curtain board 1, utilize connecting block 14 joint curtain board 1, it is all more convenient to make the installation and dismantle, through setting up pressure spring 23 and pressure strip 24, provide a pressure in opposite directions for two curtain board 1, reduce the clearance between the curtain board 1, and simultaneously, make curtain board 1 fixed more firm, thereby realize simple to operate and firm effect.
The working principle is as follows: when the high-air-tightness transverse connection structure for the curtain wall is used, a mounting plate 16 is fixedly connected to the outer wall of a building by using a fixing bolt 18, a vertical connecting column 6 is mounted at the left end of a left mounting cross beam 11, a positioning block 13 and a connecting block 14 are mounted on the left mounting cross beam 11, then a curtain wall plate 1 is placed into the left mounting cross beam 11 from the front side, the connecting block 14 slides in from the side surface of the curtain wall plate 1 along the direction of a T-shaped chute and clamps the curtain wall plate 1, a pressing plate 24 presses the curtain wall plate 1 under the action of a pressing spring 23, a right mounting cross beam 12 and the curtain wall plate 1 are sequentially mounted on the right side of the vertical connecting column 6, a vertical protection plate 2 is mounted on the front side of the vertical connecting column 6, a first sealing strip 19 is inserted into the back side of the vertical protection plate 2, a horizontal protection plate 3 is mounted on the front sides of the left mounting cross beam 11 and the right mounting cross beam 12 respectively, and a second sealing strip 20 is inserted into the back side of the horizontal protection plate 3, finally, the gap between the curtain wall plate 1 and the connecting structure is filled with the glass cement 21, and the connecting mode is simple to install and double-sealed, so that the connecting structure has the functions of high air tightness and convenience in installation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a curtain is with high gas tightness transverse connection structure, includes curtain board (1), its characterized in that: the curtain wall plate is characterized in that a vertical protection plate (2) is arranged on the side face of the curtain wall plate (1), a horizontal protection plate (3) is arranged on the upper surface of the curtain wall plate (1), step holes are formed in the front faces of the vertical protection plate (2) and the horizontal protection plate (3), locking screws (4) are inserted into the inner wall of each step hole, a protection cover (5) is overlapped on the inner wall of each step hole, the protection cover (5) is arranged on the front face of each locking screw (4), a vertical connecting column (6) is arranged on the back face of the vertical protection plate (2), a positioning rod (7) is fixedly connected to the top end of the vertical connecting column (6), an external thread groove is formed in one end, away from the top end of the vertical connecting column (6), of the positioning rod (7), a locking nut (8) is connected to the surface of the external thread groove in a threaded manner, a first connector (9) and a second connector (10) are respectively and rotatably connected to the surface of the positioning rod (7), the side surface of the first connector (9) is fixedly connected with a left mounting beam (11), the side surface of the second connector (10) is fixedly connected with a right mounting beam (12), the side surfaces of the left mounting beam (11) and the right mounting beam (12) are respectively provided with a T-shaped chute, the inner wall of the T-shaped chute is slidably connected with a positioning block (13), the upper surface of the positioning block (13) is fixedly connected with a connecting block (14), the upper surface of the connecting block (14) is provided with a rectangular placing groove, the inner wall of the rectangular placing groove is in lap joint with the surface of the curtain wall plate (1), the back surfaces of the left mounting beam (11) and the right mounting beam (12) are respectively and fixedly connected with a supporting rod (15), one end of the supporting rod (15) far away from the back surfaces of the left mounting beam (11) and the right mounting beam (12) is fixedly connected with a mounting plate (16), and the front surface of the mounting plate (16) is fixedly connected with a reinforcing rod (17), one end, far away from the front face of the mounting plate (16), of the reinforcing rod (17) is fixedly connected with the lower surface of the supporting rod (15), a through hole is formed in the front face of the mounting plate (16), a fixing bolt (18) is inserted into the inner wall of the through hole, a first sealing strip (19) is fixedly connected to the back face of the vertical protection plate (2), and a second sealing strip (20) is fixedly connected to the back face of the horizontal protection plate (3);
the front surface of the vertical connecting column (6) is provided with two threaded holes, the vertical protection plate (2) is fixedly connected with the front surface of the vertical connecting column (6) through a locking screw (4), and the horizontal protection plate (3) is respectively and fixedly connected with the front surfaces of the left mounting cross beam (11) and the right mounting cross beam (12) through the locking screw (4);
the curtain wall plate is characterized in that the number of the left mounting cross beams (11) is two, the two left mounting cross beams (11) are respectively arranged at the top end and the bottom end of the vertical connecting column (6), opposite surfaces of the two left mounting cross beams (11) are parallel to each other, and the curtain wall plate (1) is arranged between the two left mounting cross beams (11);
the quantity of right side installation crossbeam (12) is two, two right side installation crossbeam (12) sets up respectively on the top and the bottom of vertical spliced pole (6), two the opposite face of right side installation crossbeam (12) is parallel to each other, curtain board (1) sets up the centre at two right side installation crossbeams (12).
2. The high airtightness transverse connecting structure for the curtain wall according to claim 1, wherein: the quantity of curtain board (1) is a plurality of, the quantity of first sealing strip (19) is two, two the back of first sealing strip (19) respectively with the curtain board (1) of vertical spliced pole (6) both sides positive overlap joint.
3. The high airtightness transverse connecting structure for the curtain wall according to claim 1, wherein: the quantity of lock nut (8) is two, two lock nut (8) set up respectively on the top and the bottom of vertical spliced pole (6), two the equal fixedly connected with rust-resistant cladding material in surface of lock nut (8).
4. The high airtightness transverse connecting structure for the curtain wall according to claim 1, wherein: the material of first sealing strip (19) and second sealing strip (20) is rubber, the opposite face fixedly connected with glass of vertical guard plate (2) and vertical spliced pole (6) glues (21).
5. The high airtightness transverse connecting structure for the curtain wall according to claim 1, wherein: the material of horizontal protection plate (3) and vertical protection plate (2) is the aluminum alloy, the material of protective cover (5) is plastics, the specification and size and the step hole looks adaptation of protective cover (5).
6. The high airtightness transverse connecting structure for the curtain wall according to any one of claims 1 to 5, wherein: the guiding hole has been seted up to the side of vertical spliced pole (6), the inner wall sliding connection of guiding hole has guide bar (22), the surface cover of guide bar (22) is equipped with pressure spring (23), the one end fixedly connected with pressure strip (24) of vertical spliced pole (6) side is kept away from in guide bar (22), the both ends of pressure spring (23) respectively with the side of vertical spliced pole (6) and the side fixed connection of pressure strip (24), the side overlap joint of keeping away from one side of guide bar (22) and curtain board (1) of pressure strip (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679457.5A CN111719749B (en) | 2020-07-15 | 2020-07-15 | High-air-tightness transverse connection structure for curtain wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679457.5A CN111719749B (en) | 2020-07-15 | 2020-07-15 | High-air-tightness transverse connection structure for curtain wall |
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| CN111719749A CN111719749A (en) | 2020-09-29 |
| CN111719749B true CN111719749B (en) | 2021-10-26 |
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| CN208965813U (en) * | 2018-08-15 | 2019-06-11 | 江苏中南建设装饰有限公司 | A kind of glass curtain wall multi-angle regulation structure |
| CN208965815U (en) * | 2018-08-31 | 2019-06-11 | 上海富艺幕墙工程有限公司 | Novel multiple angle adjusts glass curtain wall system |
| CN109208797A (en) * | 2018-10-25 | 2019-01-15 | 无锡恒尚装饰工程有限公司 | Large span curtain wall connecting system |
| CN109403521A (en) * | 2018-12-04 | 2019-03-01 | 浙江亚飞建筑工程有限公司 | A kind of pillar construction being applicable in radian variation and the cell cube curtain wall using the structure |
| CN210798005U (en) * | 2019-07-22 | 2020-06-19 | 湖北香榭丽舍幕墙装饰工程有限公司 | Corner structure of glass curtain wall |
| CN110725444A (en) * | 2019-10-11 | 2020-01-24 | 通州建总集团有限公司 | Building curtain wall is used in room construction convenient to installation |
| CN213014907U (en) * | 2020-07-27 | 2021-04-20 | 苏州承志装饰有限公司 | Adjustable corner connection structure of hidden frame curtain wall |
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| CN111719749A (en) | 2020-09-29 |
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