CN210658862U - Frame type curtain wall stand column and cross beam quick connecting system - Google Patents

Abstract

The utility model discloses a frame-type curtain stand and crossbeam quick connect system, including stand, crossbeam, aluminum alloy base and curtain glass, be provided with first draw-in groove, second draw-in groove and third draw-in groove on the stand, thick wall and stand integrated into one piece, the utility model discloses simple structure, installation are more swift, efficiency is higher, when installing the crossbeam on the stand, no longer use the manual operation of screwing up of spanner, can adopt the electric tool construction, crossbeam processing is more convenient, need not adopt machining equipment to carry out a large amount of mills, bores the operation in the mill, only need a circular saw just can process, and it is convenient to dismantle, and adjustable precision is high, can guarantee construction quality effectively, and it is big to allow the structural deformation allowance, great, still can drop under the seismic action at the difference in temperature, safe and reliable uses on being fit for large-span, the big plate curtain glass.

Description

Frame type curtain wall stand column and cross beam quick connecting system

Technical Field

The utility model relates to a building structure technical field specifically is a frame-type curtain stand and crossbeam quick connect system.

Background

Frame-type curtain wall and unit curtain wall are glass curtain wall's main use type, and the two main difference lies in: the unitized curtain wall is assembled in a factory, hoisted on site, and made of multiple materials with high price. The frame curtain wall is processed in factories and on site, assembled and installed on construction sites, and the material used is less and the price is low.

Because the material of the frame curtain wall part is processed and assembled on site, the defects of poor processing and mounting precision, low on-site mounting efficiency and small displacement of the accommodating structure exist. Most of the defects are concentrated on the connection mode of the frame type curtain wall and the cross beam.

In a common framed curtain wall system, there are generally two types of cross beams. One is the open profile (most of the cross-beams are in this way) which is composed of an open profile and a decorative cover. Two ends of the beam are respectively connected with the upright posts through the aluminum alloy adapter angle connectors through the opposite-penetrating bolts; the other cross beam adopts a closed section without assembling a decorative cover, and the closed cross beam and the upright post are connected with each other in two modes. The first one is connected with the upright post through a stainless steel pin with a spring arranged at the two ends of the cross beam; and secondly, the cross beam is connected with the stand column through the inserting core arranged inside the cross beam, the inserting core is tightly matched with the cross beam, and the cross beam is arranged on the stand column through a stainless steel pin fixed on the inserting core.

The utility model discloses the applicant discovers, above-mentioned system that adopts the opening crossbeam, because processing work volume is few, can be in addition at the site field processing, consequently receives the welcome of construction unit, can adopt in a large number. However, the rigidity of the cross section of the open cross beam is low, and the torsion resistance and the bending resistance are poor, so that the stress requirement can be met only by adopting a larger cross section. Meanwhile, the cross beam is small in section, time and labor are wasted for bolt threading due to manual locking in a limited space, and the main reason for low installation speed is caused. The machining precision of the switching angle code is poor, so that the matching clearance between the angle code and the cross beam is too large, and the cross beam is easy to have the defects of torsional deformation, turning around outside the cross beam and the like.

In the system adopting the closed cross beam, the closed cross beam has high section rigidity and good torsion resistance and bending resistance, and the stress requirement can be met by adopting a smaller section. However, the system adopting the spring steel pin for connection and fixation has the potential safety hazard that the beam can not be disassembled after the beam is installed, and the spring steel pin is easy to fall off the upright column when the structure is deformed, and the potential safety hazard that the spring steel pin is not inserted into the upright column exists because whether the spring steel pin and the upright column are installed in place or not is invisible, so that the system is less adopted. The mode that the crossbeam lock pin is connected with the stand is adopted, the crossbeam needs to carry out a large amount of machining works such as milling, drilling in the mill, and the on-the-spot installation accuracy requires highly, speed is slow, consequently also adopts less.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a frame-type curtain stand and crossbeam quick connect system aims at improving to the shortcoming of two kinds of connected systems of the aforesaid, realizes following purpose: 1. the closed cross beam with more reasonable stress is adopted, so that the using amount of aluminum materials is saved; 2. the structure which is easier to process and install is adopted, a large amount of factory machining is not needed, and the rapid processing can be realized on the site of a construction site; the field accurate positioning is not needed, and the tolerance error is large; the nut does not need to be screwed up manually, and the nut is fixed by adopting an electric hand drill, so that the rapid installation is realized.

The utility model discloses a realize like this:

a frame type curtain wall upright post and crossbeam fast connecting system comprises upright posts, crossbeams, an aluminum alloy base and curtain wall glass, wherein the upright posts are provided with a first clamping groove, a second clamping groove and a third clamping groove, the thick wall and the upright posts are integrally formed, the larger wall thickness ensures that screws can be firmly connected, the first clamping grooves are symmetrically arranged at two sides of the upright posts, the bottom of the first clamping groove is provided with the thick wall, the second clamping groove and the third clamping groove are symmetrically arranged at the front ends of the upright posts, the crossbeam is vertically arranged at the middle part of the upright posts, the crossbeams are fixedly connected with the upright posts through aluminum alloy crossbeam insertion cores, the aluminum alloy crossbeam insertion cores are arranged inside the first clamping grooves, the front and back directions of the aluminum alloy insertion cores are limited by the front and back walls of the first clamping grooves, the up and down directions are limited by support blocks and anti-falling parts, the left and right directions are limited by the anti-falling blocks and the thick walls of, the aluminum alloy beam lock core anti-drop device is arranged at the upper end of the aluminum alloy beam lock core, the upper end of the aluminum alloy beam lock core is also provided with a groove, the aluminum alloy lock core anti-drop device is arranged in the groove, the aluminum alloy lock core anti-drop device is fixedly clamped with the groove, the aluminum alloy lock core support block is arranged at the lower end of the aluminum alloy beam lock core, the upper end surface of the aluminum alloy lock core support block is mutually attached to the lower end surface of the aluminum alloy beam lock core, the aluminum alloy lock core anti-drop device and the aluminum alloy lock core support block are both fixed on a thick wall through stainless steel self-tapping self-drilling screws, the cross beam is arranged on the outer side surface of the aluminum alloy beam lock core in an extrusion manner, the cross beam is mutually fixed,

the curtain wall glass comprises a plurality of hollow tempered glass blocks, and is characterized in that PP adhesive tapes are fixed around the aluminum alloy beam insertion core, the clamping grooves are symmetrically distributed at the upper end and the lower end, the aluminum alloy beam insertion core is inserted into the clamping grooves, the clamping strips are arranged at the front ends of the beams and integrally formed with the beams, the aluminum alloy base is arranged at the front ends of the stand columns and fixedly connected with the stand columns through heat insulation connecting pieces, the curtain wall glass comprises a plurality of hollow tempered glass blocks, and the tempered glass blocks are fixedly connected with one another through the stand columns, the beams and the aluminum alloy base.

Further, be provided with T shape dop and connecting plate on the thermal-insulated connecting piece, T shape dop symmetry is fixed at the front end of thermal-insulated connecting piece, and T shape dop is fixed with second draw-in groove joint, the connecting plate sets up at the thermal-insulated connecting piece lower extreme, and the connecting plate passes through bolt and aluminum alloy base fixed connection, toughened glass installs in the both sides of thermal-insulated connecting piece, and stand and aluminum alloy base extrusion are fixed.

Further, a foam rod is arranged between the tempered glass and the heat insulation connecting piece and is fixedly connected with the tempered glass through a sealant.

Further, still be provided with aluminum alloy stand dress trim cover on the first draw-in groove, aluminum alloy stand dress trim cover symmetry sets up the upper and lower both ends at the crossbeam, and aluminum alloy stand dress trim cover and the mutual block of first draw-in groove are fixed.

Furthermore, the clamping strip is connected with the glass toughened glass through a matching strip, and an ethylene-propylene-diene monomer adhesive tape is arranged between the matching strip and the toughened glass.

Furthermore, a fourth clamping groove is formed in the aluminum alloy base, ethylene-propylene-diene monomer rubber strips are arranged in the third clamping groove and the fourth clamping groove, an aluminum alloy assembling cover is further arranged on the outer side face of the aluminum alloy base, and the aluminum alloy assembling cover and the aluminum alloy base are clamped and fixed with each other.

Furthermore, the joints of the stand columns and the cross beams are further coated with sealant, C-shaped grooves are symmetrically formed in the outer side faces of the cross beams, aluminum alloy cross beam decorative covers are installed on the outer sides of the C-shaped grooves, and the aluminum alloy cross beam decorative covers are fixed with the C-shaped grooves in a clamped mode.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses

A closed cross beam can be adopted, and because the closed cross beam has good torsion resistance and bending rigidity, the cross section can be made smaller under the same span and load, and the material is saved; the installation is quicker and the efficiency is higher, when the cross beam is installed on the upright post, the manual screwing operation of a spanner is not used any more, and an electric tool can be adopted for construction; the beam is more convenient to process, a large amount of milling and drilling operations do not need to be carried out by machining equipment in a factory, and only one circular saw is needed for processing; the disassembly is convenient, the adjustable precision is high, and the construction quality can be effectively ensured; the allowance of deformation of the structure is large, and the structure cannot fall off under the action of earthquake with large temperature difference; safe and reliable, and is suitable for large-span and large-plate curtain wall glass.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a perspective view of the fully assembled column, beam, aluminum alloy base and curtain wall glass of the present invention;

FIG. 2 is a schematic structural view of the connection between the column and the beam of the present invention;

FIG. 3 is a transverse cross-sectional view of the connection of the cross beam and the column;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a longitudinal cross-sectional view of the connection of the cross beam and the vertical column;

FIG. 6 is a schematic structural view of the column of FIG. 2;

FIG. 7 is a schematic structural view of the isolating connector of FIG. 4;

FIG. 8 is a schematic structural view of the aluminum alloy base shown in FIG. 4;

FIG. 9 is a schematic structural view of the beam of FIG. 5;

FIG. 10 is a schematic structural view of the mating strip of FIG. 5;

FIG. 11 is a schematic structural diagram of the aluminum alloy beam ferrule shown in FIG. 5;

FIG. 12 is a schematic structural view of the aluminum alloy ferrule boot retainer of FIG. 2;

FIG. 13 is a schematic structural view of the aluminum alloy fitting cap shown in FIG. 3;

fig. 14 is a partially enlarged view of fig. 2 at B.

In the figure: 1. a column; 11. a first card slot; 111. thick wall; 112. an aluminum alloy upright post decorative cover; 12. a second card slot; 13. a third card slot; 2. a cross beam; 20. a PP adhesive tape; 21. an aluminum alloy beam inserting core; 210. a groove; 212. an aluminum alloy insert core support block; 213. self-tapping and self-drilling screws; 214. an aluminum alloy beam decorative cover; 22. an aluminum alloy core insert anti-drop piece; 23. a card slot; 24. a clamping strip; 241. a mating strip; 242. ethylene-propylene-diene monomer adhesive tapes; 25. c-shaped grooves; 3. an aluminum alloy base; 30. a fourth card slot; 31. a thermally insulated connector; 311. a T-shaped chuck; 312. a connecting plate; 313. a bolt; 314. a foam bar; 315. sealing glue; 32. an aluminum alloy assembly cover; 4. curtain wall glass; 41. and (4) tempering the glass.

Detailed Description

For the purposes of making clear the objects, technical solutions and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be described more clearly and completely below, with reference to the drawings of the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by one of ordinary skill in the art without any inventive work belong to the scope of the present invention based on the embodiments of the present invention, and therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by one of ordinary skill in the art without any inventive work based on the embodiments of the present invention, all belong to the protection scope of the utility model.

Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 and 13, a frame type curtain wall upright and beam quick connection system comprises an upright 1, a beam 2, an aluminum alloy base 3 and curtain wall glass 4, wherein the upright 1 is provided with a first clamping groove 11, a second clamping groove 12 and a third clamping groove 13, the thick walls 111 are integrally formed with the upright 1, the first clamping grooves 11 are symmetrically arranged at two sides of the upright 1, the bottom of the first clamping groove 11 is provided with the thick walls 111, the first clamping groove 11 is further provided with aluminum alloy upright decorative covers 112, the aluminum alloy upright decorative covers 112 are symmetrically arranged at the upper and lower ends of the beam 2, the aluminum alloy upright decorative covers 112 are mutually clamped and fixed with the first clamping groove 11, the first clamping groove 11 is used for installing an aluminum alloy beam 21, an aluminum alloy insert anti-falling piece 22 and an aluminum alloy insert support block 212, the arrangement of the thick wall 111 is convenient for the self-tapping and self-drilling screw 213 to be locked better, when the aluminum alloy beam insertion core 21, the aluminum alloy insertion core anti-release piece 22 and the aluminum alloy insertion core support block 212 are installed, the aluminum alloy upright post decorative cover 112 can be covered, the aluminum alloy upright post decorative cover 112 is used for decoration, meanwhile, the connection between the beam and the upright post is not abrupt, the second clamping groove 12 and the third clamping groove 13 are symmetrically arranged at the front end of the upright post 1, the beam 2 is vertically arranged in the middle of the upright post 1, the second clamping groove 12 is arranged to be matched with the T-shaped clamping head 311 to clamp the toughened glass 41, the third clamping groove 13 is arranged to be used for installing ethylene propylene diene monomer rubber strips to ensure that the aluminum alloy base can not be directly contacted with the toughened glass 41, the beam 2 is fixedly connected with the upright post 1 through the aluminum alloy beam insertion core 21, the joint of the upright post 1 and the beam 2 is also coated with sealant, the arrangement of the sealant 315 is convenient for further increasing the connection stability of the upright column 1 and the cross beam 2, and simultaneously can ensure the sealing performance of the upright column 1 and the cross beam 2, the aluminum alloy cross beam insertion core 21 is arranged in the first clamping groove 11, the aluminum alloy cross beam insertion core 21 is fixed in the first clamping groove 11 through the aluminum alloy insertion core anti-falling piece 22 and the aluminum alloy insertion core support block 212, the hook structure at the lower end of the aluminum alloy insertion core anti-falling piece 22 can well ensure that the aluminum alloy cross beam insertion core 21 cannot move, and the aluminum alloy cross beam insertion core 21 can be well supported by matching with the structure of the upper end plane of the aluminum alloy insertion core support block 212, the stress of the aluminum alloy cross beam insertion core 21 can be decomposed to the aluminum alloy insertion core anti-falling piece 22 and the aluminum alloy insertion core support block 212, the aluminum alloy insertion core anti-falling piece 22 and the aluminum alloy insertion core support block 212 are fixed on the upright, the upper end of the aluminum alloy beam insertion core 21 is also provided with a groove 210, the aluminum alloy insertion core anti-release piece 22 is arranged in the groove 210, the aluminum alloy insertion core anti-release piece 22 is fixedly clamped with the groove 210, the groove 210 is arranged to be matched with the clamping of the aluminum alloy insertion core anti-release piece 22 for use, the aluminum alloy insertion core support block 212 is arranged at the lower end of the aluminum alloy beam insertion core 21, the upper end surface of the aluminum alloy insertion core support block 212 is mutually attached to the lower end surface of the aluminum alloy beam insertion core 21, the aluminum alloy insertion core anti-release piece 22 and the aluminum alloy insertion core support block 212 are both fixed on the thick-wall 111 through stainless steel self-tapping self-drilling screws 213 and are fixed through the self-tapping self-drilling screws 213, the disassembly of a user can be facilitated while the stability is ensured, the beam 2 is arranged on the outer side surface of the aluminum alloy beam insertion core 21 in an extrusion manner, the, the PP rubber strips 20 are fixed on the periphery of the aluminum alloy beam insertion core 21, the clamping grooves 23 are symmetrically distributed at the upper end and the lower end, the aluminum alloy beam insertion core 21 is inserted in the clamping grooves 23, the aluminum alloy beam insertion core 21 can be prevented from moving towards the outer direction of the beam 2, the PP rubber strips 20 are arranged to transmit the stress of the beam 2 to the aluminum alloy beam insertion core 21, the clamping strips 24 are arranged at the front end of the beam 2, the clamping strips 24 and the beam 2 are integrally formed, the clamping strips 24 are connected with the glass reinforced glass 41 through the matching strips 241, ethylene propylene diene monomer rubber strips 242 are further arranged between the matching strips 241 and the glass reinforced 41, the arrangement of the clamping strips 24 is used for conveniently installing the matching strips 241 for use, the beam 2 can be better extruded with the glass reinforced 41, the beam 2 can be better in direct contact with the glass reinforced 41 through the ethylene propylene diene monomer rubber strips 242, and the damage of the beam 2 to the, the outer side surface of the beam 2 is symmetrically provided with a C-shaped groove 25, the outer side of the C-shaped groove 25 is provided with an aluminum alloy beam decorative cover 214, the aluminum alloy beam decorative cover 214 and the C-shaped groove 25 are mutually clamped and fixed, the aluminum alloy base 3 is arranged at the front end of the upright post 1, the aluminum alloy base 3 is fixedly connected with the upright post 1 through a heat insulation connecting piece 31, the aluminum alloy base 3 is provided with a fourth clamping groove 30, ethylene propylene diene monomer rubber strips 242 are respectively arranged in the third clamping groove 13 and the fourth clamping groove 30, the outer side surface of the aluminum alloy base 3 is also provided with an aluminum alloy assembling cover 32, the aluminum alloy assembling cover 32 and the aluminum alloy base 3 are mutually clamped and fixed, the heat insulation connecting piece 31 is provided with a T-shaped clamping head 311 and a connecting plate 312, the T-shaped clamping head 311 is symmetrically fixed at the front end of the heat insulation connecting piece 31, the T-shaped clamping head, toughened glass 41 installs the both sides at thermal-insulated connecting piece 31, and stand 1 is fixed with the extrusion of aluminum base 3, can change thermal-insulated connecting piece 31 and aluminum base 3's interval wantonly through bolt 313 user, thereby reach the purpose of pressing from both sides tight toughened glass 41, curtain wall glass 4 comprises a plurality of hollow toughened glass 41, through stand 1 between the toughened glass 41, crossbeam 2 and aluminum base 3 come fixed connection, the user can be through stand 1, crossbeam 2 and aluminum base 3 come fixed equipment arbitrary area size's curtain wall glass 4, still be provided with foam rod 314 between toughened glass 41 and the thermal-insulated connecting piece 31, foam rod 314 is through sealed glue 315 and toughened glass 41 fixed connection, it can not direct contact to guarantee that toughened glass 41 and thermal-insulated connecting piece 31 can not direct contact through the setting of foam rod 314, prevent toughened glass 41's damage.

The device obtained by the design can basically meet the use requirement of a frame type curtain wall upright post and crossbeam quick connection system, but the designer further improves the device according to the aim of further improving the functions of the device.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a frame-type curtain stand and crossbeam quick connect system, includes stand (1), crossbeam (2), aluminum alloy base (3) and glass curtain wall (4), its characterized in that: the aluminum alloy clamping structure is characterized in that a first clamping groove (11), a second clamping groove (12) and a third clamping groove (13) are formed in the upright column (1), the first clamping grooves (11) are symmetrically arranged on two sides of the upright column (1), the bottom of the first clamping groove (11) is provided with a thick wall (111), the thick wall (111) and the upright column (1) are integrally formed, the second clamping groove (12) and the third clamping groove (13) are symmetrically arranged at the front end of the upright column (1), the cross beam (2) is vertically arranged in the middle of the upright column (1), the cross beam (2) is fixedly connected with the upright column (1) through an aluminum alloy cross beam insertion core (21), the aluminum alloy cross beam (21) is arranged in the first clamping groove (11), the aluminum alloy cross beam insertion core (21) is fixed in the first clamping groove (11) through an aluminum alloy insertion core anti-falling piece (22) and an aluminum alloy insertion core support block (212), and the aluminum alloy insertion core anti-falling piece (22) is arranged at the, the aluminum alloy beam inserting core comprises an aluminum alloy beam inserting core (21), and is characterized in that a groove (210) is further formed in the upper end of the aluminum alloy beam inserting core (21), an aluminum alloy inserting core anti-falling piece (22) is installed in the groove (210), the aluminum alloy inserting core anti-falling piece (22) is fixedly clamped with the groove (210), an aluminum alloy inserting core support block (212) is arranged at the lower end of the aluminum alloy beam inserting core (21), the upper end face of the aluminum alloy inserting core support block (212) is mutually attached to the lower end face of the aluminum alloy beam inserting core (21), the aluminum alloy inserting core anti-falling piece (22) and the aluminum alloy inserting core support block (212) are fixed on a thick wall (111) through stainless steel self-tapping self-drilling screws (213), a beam (2) is installed on the outer side face of the aluminum alloy beam inserting core (21) in an extrusion mode, the beam (2) is fixedly extruded and fixed with the aluminum alloy beam inserting core (21), draw-in groove (23) symmetric distribution is at upper and lower both ends, PP adhesive tape (20) are fixed around draw-in groove (23), joint strip (24) set up the front end at crossbeam (2), and joint strip (24) and crossbeam (2) integrated into one piece, aluminum alloy base (3) set up the front end at stand (1), and aluminum alloy base (3) through thermal-insulated connecting piece (31) and stand (1) fixed connection, glass curtain wall (4) comprise a plurality of hollow toughened glass (41), come fixed connection through stand (1), crossbeam (2) and aluminum alloy base (3) between toughened glass (41).

2. A frame type curtain wall column and beam quick connecting system as claimed in claim 1, wherein a T-shaped clamping head (311) and a connecting plate (312) are arranged on the heat insulation connecting piece (31), the T-shaped clamping head (311) is symmetrically fixed at the front end of the heat insulation connecting piece (31), the T-shaped clamping head (311) is clamped and fixed with the second clamping groove (12), the connecting plate (312) is arranged at the lower end of the heat insulation connecting piece (31), the connecting plate (312) is fixedly connected with the aluminum alloy base (3) through a bolt (313), the toughened glass (41) is arranged on two sides of the heat insulation connecting piece (31), and the column (1) and the aluminum alloy base (3) are fixed in an extruding manner.

3. A frame type curtain wall column and beam quick connection system as claimed in claim 2, wherein a foam bar (314) is further arranged between the tempered glass (41) and the heat insulation connecting member (31), and the foam bar (314) is fixedly connected with the tempered glass (41) through a sealant (315).

4. A frame type curtain wall column and beam quick connecting system as claimed in claim 3, wherein the first clamping groove (11) is further provided with aluminum alloy column decorative covers (112), the aluminum alloy column decorative covers (112) are symmetrically arranged at the upper and lower ends of the beam (2), and the aluminum alloy column decorative covers (112) and the first clamping groove (11) are mutually clamped and fixed.

5. The system for quickly connecting the upright post and the cross beam of the frame-type curtain wall as claimed in claim 4, wherein the clamping strip (24) is connected with the glass toughened glass (41) through a matching strip (241), and an ethylene propylene diene monomer (242) is further arranged between the matching strip (241) and the toughened glass (41).

6. The system for quickly connecting the upright post and the cross beam of the frame-type curtain wall as claimed in any one of claims 1 to 5, wherein a fourth clamping groove (30) is formed in the aluminum alloy base (3), ethylene propylene diene monomer rubber strips (242) are arranged in the third clamping groove (13) and the fourth clamping groove (30), an aluminum alloy assembling cover (32) is further arranged on the outer side surface of the aluminum alloy base (3), and the aluminum alloy assembling cover (32) and the aluminum alloy base (3) are mutually clamped and fixed.

7. A frame type curtain wall column and beam quick connecting system as claimed in claim 6, wherein a sealant (315) is further coated at the joint of the column (1) and the beam (2), a C-shaped groove (25) is symmetrically arranged on the outer side surface of the beam (2), an aluminum alloy beam decorative cover (214) is installed on the outer side of the C-shaped groove (25), and the aluminum alloy beam decorative cover (214) and the C-shaped groove (25) are mutually clamped and fixed.

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