Insulation board and installation method thereof in steel structure building

Abstract

The invention discloses a heat insulation board and a mounting method thereof in a steel structure building, and belongs to the technical field of heat insulation boards, the heat insulation board comprises a cross beam, an inner heat insulation board and an outer heat insulation board are attached to the two sides of the cross beam respectively, connecting plates are arranged between the inner heat insulation board and the outer heat insulation board, and the two connecting plates are connected through an adjusting mechanism; the adjusting mechanism is used for adjusting the positions of the inner heat preservation plate, the outer heat preservation plate and the connecting plate so as to be connected with the cross beam. The heat preservation mechanism is arranged on the inner side of the inner heat preservation plate, and the heat preservation effect is improved by introducing hot air or hot water into the heat preservation mechanism. According to the heat preservation plate and the mounting method of the heat preservation plate in the steel structure building, the heat preservation effect of the heat preservation plate can be conveniently adjusted according to the use requirement, the connection between the heat preservation plate and the steel structure can avoid structural damage caused by bolt connection, meanwhile, the gap between the adjacent heat preservation plates can be reduced, and then the heat preservation effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of insulation boards, in particular to an insulation board and a mounting method thereof in a steel structure building. BACKGROUND

[0002] The insulation board can improve the overall insulation effect of the building, and the installation of the insulation board is a key link to ensure the energy-saving performance of the steel structure building. The insulation system of the steel structure building is an important part of the building envelope structure, which directly affects the energy consumption, comfort and durability of the building. For example, the announcement number CN104213650B, a kind of expanded perlite insulation board with grid base and installation method, in the production process, a kind of grid base is integrated, and a kind of expanded perlite insulation board with grid base is constructed. An operation opening is provided at the outer edge of the side of the grid base close to the building base, and a fastening hole is reserved at the bottom of the operation opening. Drill holes in the building base, and directly fasten the insulation board to the building base by mechanical screwing. The entire load of the insulation board is completely borne by the base and transmitted to the building base, and the leveling system is adjusted to level. The two adjacent insulation boards are connected by the connector. Effectively solve the problem of complicated construction process of building expanded perlite insulation board, the installation process does not damage the surface of the expanded perlite insulation board, and the construction process is simplified. At the same time, there is a gap between the expanded perlite insulation board and the building base, which enhances the effect of energy saving and heat preservation. For example, the announcement number CN111794395B, a kind of external wall insulation board fixing device and installation method, belongs to the technical field of external wall insulation board installation and construction, which includes pre-installed wall, insulation board and fixing unit. The fixing unit is provided with multiple groups, and multiple groups of the fixing unit limit the displacement of the insulation board. The fixing unit is fixedly connected with the pre-installed wall, and the fixing unit is attached to the surface of the insulation board. The fixing unit includes a rotating piece, and the rotating piece is fixedly connected with a side plate. The side plate is attached to the surface of the insulation board, and the side plate is suitable for limiting the movement of the insulation board. It solves the problem of large waste of materials and high labor intensity of the fixing device, greatly saving materials and labor. However, the above-mentioned insulation board and installation method still have the following disadvantages in actual installation process: 1. The traditional insulation board mostly improves its insulation effect by filling insulation cotton, so its insulation performance is fixedly set, and it is not convenient to adjust the insulation effect of the insulation board according to the demand of use; 2. And the traditional insulation board and the steel structure are mostly installed by the way of bolt connection, so it will cause damage to the insulation board and the steel structure. At the same time, after the installation of the insulation board, there will be gaps between the adjacent insulation boards and between the insulation board and the steel structure, so the insulation effect of the insulation board will be reduced.

[0003] In view of the above problems, it is urgent to make innovative design on the basis of the original insulation board and its installation method. SUMMARY

[0004] The present application aims to provide an insulation board and its installation method in steel structure building, to solve the above background art that the conventional insulation board is inconvenient to adjust the insulation effect of the insulation board according to the demand of use, and the conventional bolt connection method will damage the insulation board and the steel structure, and there will be gaps between adjacent insulation boards and between the insulation board and the steel structure after installation.

[0005] To achieve the above object, the present application provides the following technical scheme: an insulation board, comprising a crossbeam, an inner insulation board and an outer insulation board are respectively attached on both sides of the crossbeam, and a connecting plate is arranged between the inner insulation board and the outer insulation board, two connecting plates are connected to each other through an adjusting mechanism, and the adjusting mechanism is used to adjust the position of the inner insulation board, the outer insulation board and the connecting plate, so as to be connected with the crossbeam. It also includes a heat preservation mechanism arranged on the inner side of the inner insulation board, and the heat preservation mechanism is internally filled with hot air or hot water to improve the heat preservation effect.

[0006] Preferably, the adjusting mechanism comprises a lead screw fixed on the connecting plate, the outer side of the lead screw is threadedly sleeved with a movable cylinder, the outer side of the movable cylinder is fixedly sleeved with a worm gear, the connecting plate and the lead screw are symmetrically arranged about the movable cylinder, and the movement directions of the two connecting plates and the lead screw are opposite.

[0007] Preferably, the side of the worm gear is engaged with a worm, both ends of the worm are provided with connecting rods, the connecting rods and the worm are in sliding connection, and one end of the connecting rod away from the worm penetrates into the inner insulation board and the outer insulation board.

[0008] Preferably, the inner insulation board and the outer insulation board on the outer side of the connecting rod are both provided with fixing holes, one end of the connecting rod away from the worm is sleeved with an adjusting piece, and the internal cavities of the adjusting piece, the worm and the connecting rod are all rectangular structures.

[0009] Preferably, both ends of the connecting plate are fixed with fixed rods, the outer side of the fixed rods is sleeved with supporting blocks, the supporting blocks are fixed on the inner walls of the inner insulation board and the outer insulation board, the inner side of the supporting blocks is provided with guide grooves, the fixed rods and the guide grooves are in sliding connection, and the guide grooves are inclinedly arranged.

[0010] Preferably, the inner walls of the insulation board and the outer insulation board are fixed with supporting plates, adjacent two supporting plates are connected to each other through connecting pieces, the connecting pieces are made of rubber, and the supporting plates and the connecting pieces between two groups of oppositely distributed supporting plates are both filled with heat preservation cotton.

[0011] Preferably, the heat preservation mechanism comprises a fixed channel formed in the inner heat preservation plate, the fixed channel is curved, hot air or hot water is introduced into the fixed channel, a connecting pipe is fixed to the side of the inner heat preservation plate, and the connecting pipe is used to connect two adjacent inner heat preservation plates.

[0012] Preferably, the surface of the inner heat preservation plate is provided with a fixed frame, strip plates are distributed at equal intervals on the inner side of the fixed frame, the strip plates and the fixed frame form a rotating structure through a shaft, a rubber wheel is fixedly sleeved on the shaft of the strip plate, adjusting plates are tightly arranged on the side of the rubber wheel, and the adjusting plates and the fixed frame are in sliding connection.

[0013] A mounting method of a heat preservation plate in a steel structure building, the mounting method comprises the following steps: Step one: first, assemble the connecting plate, the lead screw and the movable cylinder, then assemble the inner heat preservation plate, the outer heat preservation plate and the connecting plate, and separate the space outside the lead screw and the movable cylinder through the supporting plate and the connecting piece, and fill the separated space with heat preservation cotton; Step two: then connect the adjusting member with the connecting rod, rotate the adjusting member to drive the two lead screws to rotate through the meshing transmission of the worm and the worm wheel, and drive the two connecting plates to move close to each other through the threaded transmission of the lead screw and the movable cylinder, and simultaneously drive the inner heat preservation plate and the outer heat preservation plate to move away from each other; Step three: finally, install the adjusted inner heat preservation plate, outer heat preservation plate and connecting plate between the two cross beams, rotate the adjusting member in the opposite direction to make the two connecting plates move away from each other, and simultaneously make the inner heat preservation plate and the outer heat preservation plate move close to each other, so that the connecting plate and the inner heat preservation plate and the outer heat preservation plate can be tightly attached to the outer wall of the cross beam to complete the installation.

[0014] Compared with the prior art, the heat preservation plate and the mounting method thereof in the steel structure building have the following beneficial effects: the heat preservation effect of the heat preservation plate can be adjusted according to the requirements, the connection between the heat preservation plate and the steel structure can avoid structural damage caused by bolt connection, and the gap between adjacent heat preservation plates can be reduced, thereby improving the heat preservation effect. 1. Through the meshing of the worm and the worm wheel and the threaded transmission of the movable cylinder and the lead screw, the two connecting plates are driven to move close to each other, then the fixed rod is guided to slide through the inclined guide groove, so that the inner heat preservation plate and the outer heat preservation plate move away from each other, the inner heat preservation plate, the outer heat preservation plate and the connecting plate are connected with the cross beam, after the connection between the heat preservation plate and the cross beam is completed, the two connecting plates are driven to move away from each other and abut against the side of the cross beam through the threaded transmission of the lead screw and the movable cylinder, at the same time, the inner heat preservation plate and the outer heat preservation plate move close to each other and tightly attach to the side of the cross beam, and the tightness between adjacent heat preservation plates can also be ensured; 2. Hot air or hot water is introduced into the fixed channel to improve the heat preservation effect of the inner heat preservation plate. When the heat in the inner heat preservation plate needs to be dissipated to the room to a greater extent, one of the strips can be actuated to rotate. By adjusting the close fit of the plate and the rubber wheel, the adjacent rubber wheel can be driven to rotate synchronously by the adjusting plate, and then the strip is driven to rotate, so that it is perpendicular to the inner heat preservation plate. This can play a role in heating and improving the heat preservation effect. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a schematic view of the heat preservation plate and beam splicing structure of the present application; Figure 2 Fig. 2 is a schematic view of the inner heat preservation plate and outer heat preservation plate structure of the present application; Figure 3 Fig. 3 is a schematic view of the cross-sectional structure of the inner heat preservation plate and outer heat preservation plate of the present application; Figure 4 Fig. 4 is a schematic view of the movable cylinder structure of the present application; Figure 5 Fig. 5 is a schematic view of the cross-sectional structure of the movable cylinder of the present application; Figure 6 Fig. 6 is a schematic view of the support plate and connecting piece structure of the present application; Figure 7 Fig. 7 is a schematic view of the inner heat preservation plate and outer heat preservation plate away from the structure of the present application; Figure 8 Fig. 8 is a schematic view of the connecting piece deformation structure of the present application; Figure 9 Fig. 9 is a schematic view of the cross-sectional structure of the inner heat preservation plate of the present application; Figure 10 Fig. 10 is a schematic view of the structure after the strip rotates of the present application.

[0016] In the figure: 1, beam; 2, inner heat preservation plate; 3, outer heat preservation plate; 4, connecting plate; 5, lead screw; 6, movable cylinder; 7, worm gear; 8, worm; 9, connecting rod; 10, adjusting piece; 11, fixed hole; 12, fixed rod; 13, support block; 14, guide groove; 15, support plate; 16, connecting piece; 17, fixed channel; 18, connecting pipe; 19, fixed frame; 20, strip; 21, rubber wheel; 22, adjusting plate. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0018] Please refer to Figures 1-10The application provides the following technical scheme: In order to solve the problems in the prior art, the embodiment provides a thermal insulation board, which comprises a cross beam 1, and inner and outer thermal insulation boards 2 and 3 are respectively arranged on the two sides of the cross beam 1, and a connecting plate 4 is arranged between the inner and outer thermal insulation boards 2 and 3, the two connecting plates 4 are connected to each other through an adjusting mechanism, and the adjusting mechanism is used for adjusting the positions of the inner and outer thermal insulation boards 2 and 3 and the connecting plate 4 so as to be connected to the cross beam 1; further comprising a thermal insulation mechanism arranged on the inner side of the inner thermal insulation board 2, and the thermal insulation mechanism is internally provided with hot air or hot water to improve the thermal insulation effect.

[0019] The existing thermal insulation board and the steel structure are mostly installed in a bolt connection mode, so that the thermal insulation board and the steel structure are damaged, meanwhile, after the thermal insulation board is installed, gaps exist between adjacent thermal insulation boards and between the thermal insulation board and the steel structure, so that the thermal insulation effect of the thermal insulation board is reduced, for example Figures 1-8As shown, the adjusting mechanism comprises a lead screw 5 fixed on the connecting plate 4, an outer threaded sleeve of the lead screw 5 is sleeved with a movable cylinder 6, an outer side of the movable cylinder 6 is fixedly sleeved with a worm gear 7, the connecting plate 4 and the lead screw 5 are symmetrically arranged about the movable cylinder 6, and the movement directions of the two connecting plates 4 and the lead screw 5 are opposite; the side of the worm gear 7 is engagedly connected with a worm 8, both ends of the worm 8 are provided with connecting rods 9, the connecting rods 9 and the worm 8 are in sliding connection, and one end of the connecting rod 9 away from the worm 8 penetrates into the inner thermal insulation plate 2 and the outer thermal insulation plate 3; the inner thermal insulation plate 2 and the outer thermal insulation plate 3 on the outer side of the connecting rod 9 are both provided with fixing holes 11, one end of the connecting rod 9 away from the worm 8 is sleeved with an adjusting piece 10, and the internal cavities of the adjusting piece 10 and the worm 8 and the cross section of the connecting rod 9 are all rectangular structures; both ends of the connecting plate 4 are fixedly provided with fixed rods 12, outer sides of the fixed rods 12 are sleeved with supporting blocks 13, the supporting blocks 13 are fixed on the inner walls of the inner thermal insulation plate 2 and the outer thermal insulation plate 3, inner sides of the supporting blocks 13 are provided with guide grooves 14, and the fixed rods 12 and the guide grooves 14 are in sliding connection, and the guide grooves 14 are obliquely arranged; the inner walls of the inner thermal insulation plate 2 and the outer thermal insulation plate 3 are fixedly provided with supporting plates 15, adjacent two supporting plates 15 are connected with each other through connecting pieces 16, the connecting pieces 16 are made of rubber, and the adjacent two groups of supporting plates 15 and connecting pieces 16 are both filled with thermal insulation cotton; when it is needed to install the thermal insulation plate, the adjusting piece 10 is connected with the connecting rod 9, then the adjusting piece 10 is rotated to drive the connecting rod 9 to rotate, thereby driving the worm 8 to rotate, and the worm 8 drives the movable cylinder 6 to rotate through the meshing transmission with the worm gear 7, then the movable cylinder 6 drives the two lead screws 5 and the connecting plates 4 to move close to each other through the threaded transmission with the lead screw 5, when the two connecting plates 4 move close to each other, the fixed rods 12 can be driven to slide in the guide grooves 14, the inner thermal insulation plate 2 and the outer thermal insulation plate 3 are driven to move away from each other through the oblique guide grooves 14, so that the inner thermal insulation plate 2, the outer thermal insulation plate 3 and the connecting plate 4 can be conveniently connected with the cross beam 1 when the adjacent cross beams 1 are in a fixed state, when the inner thermal insulation plate 2, the outer thermal insulation plate 3 and the connecting plate 4 are moved, the connecting pieces 16 can be deformed, the arrangement of the thermal insulation cotton in the thermal insulation plate will not be affected, and the stability between the thermal insulation plates will not be affected, after the connection between the thermal insulation plate and the cross beam 1 is completed, the adjusting piece 10 is reversely rotated, then the two connecting plates 4 are driven to move away from each other through the threaded transmission between the lead screw 5 and the movable cylinder 6 and abut against the side surfaces of the cross beam 1, at the same time, the inner thermal insulation plate 2 and the outer thermal insulation plate 3 are driven to move close to each other and abut against the side surfaces of the cross beam 1, after the adjustment is completed, the adjusting piece 10 can be dismounted from the connecting rod 9, the flatness of the surface of the thermal insulation plate is ensured, then the adjacent thermal insulation plates are all connected with the cross beam 1, the compactness between the adjacent thermal insulation plates can be ensured, and the thermal insulation effect of the subsequent wall body is improved.

[0020] Embodiment 2: The existing insulation board mostly improves the insulation effect by filling insulation cotton, so the insulation performance is fixedly set and it is inconvenient to adjust the insulation effect of the insulation board according to the use requirement. Therefore, the technical scheme is as follows: Figures 9-10 As shown in the figure, the heat preservation mechanism comprises a fixed channel 17 provided in the inner insulation board 2, the fixed channel 17 is curved, and the fixed channel 17 is used for passing hot air or hot water. The side surface of the inner insulation board 2 is fixedly provided with a connecting pipe 18, and the connecting pipe 18 is used for connecting two adjacent inner insulation boards 2. The surface of the inner insulation board 2 is provided with a fixed frame 19, and the inner side of the fixed frame 19 is provided with strip plates 20 at equal intervals. The strip plates 20 are rotatably connected to the fixed frame 19 through shafts. Rubber wheels 21 are fixedly sleeved on the shafts of the strip plates 20. The side surface of the rubber wheel 21 is closely provided with an adjusting plate 22. The adjusting plate 22 and the fixed frame 19 are slidably connected. After the installation of the insulation board is completed, when it is necessary to improve the insulation effect of the insulation board, hot air or hot water is passed into the fixed channel 17 to improve the insulation effect of the inner insulation board 2. The fixed channels 17 in adjacent insulation boards are connected through the connecting pipe 18 to realize communication. When it is necessary to make the heat in the inner insulation board 2 be emitted to the room to a greater extent, one of the strip plates 20 is actuated to rotate. Through the close contact of the adjusting plate 22 and the rubber wheel 21, the adjacent rubber wheels 21 can be synchronously rotated by the adjusting plate 22. Then the strip plate 20 is rotated to be perpendicular to the inner insulation board 2. In this way, the heat in the inner insulation board 2 can be emitted to a greater extent to play a role of heating and improve the insulation effect. When it is not necessary to improve the insulation effect, the strip plate 20 is actuated to rotate to be close to the inner insulation board 2 through the close contact of the adjusting plate 22 and the rubber wheel 21.

[0021] Embodiment 3: A method for installing an insulation board in a steel structure building, the installation method comprises the following steps: Step one: first, the connecting plate 4, the lead screw 5 and the movable cylinder 6 are assembled. Then, the inner insulation board 2, the outer insulation board 3 and the connecting plate 4 are assembled. The space outside the lead screw 5 and the movable cylinder 6 is separated by the supporting plate 15 and the connecting piece 16. The separated space is filled with insulation cotton. Step two: then, the adjusting part 10 is connected with the connecting rod 9. The adjusting part 10 is rotated to drive the two lead screws 5 to rotate through the meshing transmission of the worm 8 and the worm wheel 7. The two connecting plates 4 are brought close to each other through the threaded transmission of the lead screw 5 and the movable cylinder 6. The inner insulation board 2 and the outer insulation board 3 are synchronously moved away from each other. Step three: finally, the adjusted inner insulation board 2, outer insulation board 3 and connecting plate 4 are installed between the two beams 1, by reverse rotation of the adjusting member 10, the two connecting plates 4 are away from each other, and the inner insulation board 2 and the outer insulation board 3 are close to each other, so that the connecting plate 4 and the inner insulation board 2 and the outer insulation board 3 can be attached to the outer wall of the beam 1 to complete the installation.

[0022] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat preservation plate, comprising a crossbeam (1), an inner heat preservation plate (2) and an outer heat preservation plate (3) are respectively arranged on both sides of the crossbeam (1), and a connecting plate (4) is arranged between the inner heat preservation plate (2) and the outer heat preservation plate (3), the two connecting plates (4) are connected to each other through an adjusting mechanism, and the adjusting mechanism is used for adjusting the positions of the inner heat preservation plate (2), the outer heat preservation plate (3) and the connecting plate (4) so as to be connected with the crossbeam (1). characterized in that Further comprising: A heat preservation mechanism is arranged on the inner side of the inner heat preservation plate (2), and the heat preservation mechanism is internally provided with a fixed channel (17) for passing in hot air or hot water to improve the heat preservation effect.

2. A thermal panel according to claim 1, characterised in that: The adjusting mechanism comprises a lead screw (5) fixed on the connecting plate (4), the outer side of the lead screw (5) is threadedly sleeved with a movable cylinder (6), the outer side of the movable cylinder (6) is fixedly sleeved with a worm gear (7), the connecting plate (4) and the lead screw (5) are symmetrically arranged about the movable cylinder (6), and the movement directions of the two connecting plates (4) and the lead screw (5) are opposite.

3. A thermal panel according to claim 2, characterised in that: The side of the worm gear (7) is engaged and connected with a worm (8), both ends of the worm (8) are provided with connecting rods (9), the connecting rods (9) and the worm (8) are slidingly connected, and one end of the connecting rod (9) away from the worm (8) penetrates into the inner heat preservation plate (2) and the outer heat preservation plate (3).

4. A thermal panel according to claim 3, characterised in that: The inner heat preservation plate (2) and the outer heat preservation plate (3) on the outer side of the connecting rod (9) are both provided with fixing holes (11), one end of the connecting rod (9) away from the worm (8) is sleeved with an adjusting piece (10), and the internal cavities of the adjusting piece (10), the worm (8) and the connecting rod (9) are all rectangular structures.

5. A thermal panel according to claim 1, characterised in that: Both ends of the connecting plate (4) are fixedly provided with fixed rods (12), the outer side of the fixed rod (12) is sleeved with a supporting block (13), the supporting block (13) is fixed to the inner walls of the inner heat preservation plate (2) and the outer heat preservation plate (3), the inner side of the supporting block (13) is provided with a guide groove (14), the fixed rod (12) and the guide groove (14) are slidingly connected, and the guide groove (14) is inclinedly arranged.

6. A thermal panel according to claim 1, characterised in that: The inner walls of the inner heat preservation plate (2) and the outer heat preservation plate (3) are fixedly provided with supporting plates (15), adjacent two supporting plates (15) are connected to each other through connecting pieces (16), the connecting pieces (16) are made of rubber, and the supporting plates (15) and the connecting pieces (16) between two groups of oppositely distributed supporting plates (15) and connecting pieces (16) are both filled with heat preservation cotton.

7. A thermal panel according to claim 1, characterised in that: The heat preservation mechanism comprises a fixed channel (17) arranged in the inner heat preservation plate (2), the fixed channel (17) is curved, hot air or hot water is used for passing into the fixed channel (17), and a connecting pipe (18) is fixed to the side of the inner heat preservation plate (2), and the connecting pipe (18) is used for connecting adjacent two inner heat preservation plates (2).

8. A thermal panel according to claim 7, characterised in that: The surface of the inner thermal insulation board (2) is provided with a fixed frame (19), and the inner side of the fixed frame (19) is equally spaced with a strip (20), and the strip (20) is rotatably connected with the fixed frame (19) through a shaft, and a rubber wheel (21) is fixedly arranged on the shaft of the strip (20), and the side of the rubber wheel (21) is closely provided with an adjusting plate (22), and the adjusting plate (22) and the fixed frame (19) are slidingly connected.

9. The method of installing a thermal panel in a steel building structure according to claim 1, wherein: The mounting method comprises the following steps: Step one: first, assemble the connecting plate (4), the lead screw (5) and the movable cylinder (6), then assemble the inner thermal insulation board (2), the outer thermal insulation board (3) and the connecting plate (4), and the space outside the lead screw (5) and the movable cylinder (6) is separated by the supporting plate (15) and the connecting plate (16), and the separated space is filled with thermal insulation cotton; Step two: then connect the adjusting part (10) with the connecting rod (9), rotate the adjusting part (10) to drive the two lead screws (5) to rotate through the meshing transmission of the worm (8) and the worm gear (7), and drive the two connecting plates (4) to move close to each other through the threaded transmission of the lead screw (5) and the movable cylinder (6), and the inner thermal insulation board (2) and the outer thermal insulation board (3) move away from each other at the same time; Step three: finally, install the adjusted inner thermal insulation board (2), outer thermal insulation board (3) and connecting plate (4) between the two cross beams (1), rotate the adjusting part (10) in the opposite direction, so that the two connecting plates (4) move away from each other, and the inner thermal insulation board (2) and the outer thermal insulation board (3) move close to each other at the same time, so that the connecting plate (4) and the inner thermal insulation board (2) and the outer thermal insulation board (3) can be closely attached to the outer wall of the cross beam (1) to complete the installation.

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