An assembled adjustable dropped ceiling and installation method

Abstract

An assembled adjustable dropped ceiling and installation method, including a first ceiling hanging structure, one end of the first ceiling hanging structure is installed on the floor slab, the other end of the first ceiling hanging structure is connected to a channel-shaped keel, the channel-shaped keel is connected to one end of a high-level decorative panel through a connecting piece, and the other end of the high-level decorative panel is fixedly connected to the wall; including a second ceiling hanging structure, one end of the second ceiling hanging structure is installed on the floor slab, the other end of the second ceiling hanging structure is connected to a low-level decorative panel through an extended right-angle angle steel and a right-angle connecting block, one end of the low-level decorative panel is fixedly connected to the wall through a first component and a second component, and the other end of the low-level decorative panel is connected to the connecting piece through an aluminum alloy snap-in line. Most of the connections between the high-level decorative panel and the low-level decorative panel of the present invention adopt plug-in cooperation, which is convenient for replacement and disassembly, and does not affect the strength of the entire assembled dropped ceiling when the replaced thickness is different.

Description

Technical Field

[0001] The present invention relates to the technical field of building decoration, and in particular to a prefabricated adjustable dropped ceiling and an installation method thereof. Background Art

[0002] A dropped ceiling refers to a ceiling with a lowered elevation that is not on the same plane, in a form similar to a staircase. Due to the installation of the dropped ceiling, the thickness of the decorative panels of the dropped ceiling on the market is mostly a fixed parameter, and the thickness of the decorative panels at the lower end of the erected dropped ceiling cannot be flexibly adjusted.

[0003] For example, a Chinese invention patent with the patent application number CN201811327494.9 and the name of a dropped ceiling system includes a shaped snap-in keel system, F-shaped keels, and structural gypsum boards; the use of the shaped snap-in keels can very conveniently create different dropped ceiling shapes; the use of F-shaped keels makes it very easy to create an arc shape within the same dropped ceiling plane; it can also ensure that the dropped ceiling is not easily cracked at the inside / outside corners. In addition, this dropped ceiling system is entirely a light steel keel gypsum board structure, eliminating many disadvantages of wooden boards. However, there are the following problems: First, the decorative panels at its lower end are all connected to the upper structure by bolts, and the decorative panels cannot be easily replaced; Second, the replacement of the decorative panels at its lower end will affect the design of the length and height of the entire dropped ceiling, and replacing the thinner decorative panels will affect the strength of the entire dropped ceiling. Third, the installation and disassembly are not convenient enough.

[0004] Therefore, there is a lack of technology for replacing decorative panels on the market, and there is also a lack of technology for thin-layer dropped ceilings. In the adjustment range of 0 - 3 mm for the thickness of the decorative panels, there is also a lack of dropped ceiling connection components and installation methods that meet the requirements of assembly.

[0005] Based on the above problems, there is an urgent need for a prefabricated adjustable dropped ceiling and an installation method thereof. Summary of the Invention

[0006] The present invention is to overcome the above-mentioned defects in the prior art and provide a prefabricated adjustable dropped ceiling and an installation method thereof.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: an assembled adjustable stepped ceiling, including a first ceiling hanging structure, one end of the first ceiling hanging structure is installed on the floor slab, the other end of the first ceiling hanging structure is connected to a channel-shaped keel, the channel-shaped keel is connected to one end of a high-level decorative panel through a connecting member, and the other end of the high-level decorative panel is fixedly connected to the wall; including a second ceiling hanging structure, one end of the second ceiling hanging structure is installed on the floor slab, the other end of the second ceiling hanging structure is connected to a low-level decorative panel through an extended right-angle angle steel and a right-angle connecting block, one end of the low-level decorative panel is fixedly connected to the wall through a first member and a second member, and the other end of the low-level decorative panel is connected to the connecting member through a snap-in line.

[0008] As a preferred solution of the present invention, the snap-in line includes a first connecting section, a second connecting section, and a transition section connecting the first connecting section and the second connecting section; the first connecting section is inserted into a low-level decorative panel slot formed at the end of the low-level decorative panel, the second connecting section includes a second connecting section slot and a receiving section between the second connecting section slot and the transition section, and the receiving section abuts against the side surface of the high-level decorative panel.

[0009] As a preferred solution of the present invention, an upward first connecting section protrusion is formed at the end of the first connecting section, and the transition section is obliquely arranged with respect to the first connecting section.

[0010] As a preferred solution of the present invention, the connecting member includes a connecting part at the upper end and a plug-in part at the lower end, the connecting part is fixedly connected to the channel-shaped keel, one end of the plug-in part is inserted into a high-level decorative panel slot formed at the end of the high-level decorative panel, the other end of the plug-in part is inserted into the second connecting section slot, and upward plug-in part protrusions are formed at both ends of the plug-in part.

[0011] As a preferred solution of the present invention, the first member includes a first abutting part abutting against the wall surface and a second abutting part abutting against the top of the low-level decorative panel, and an abutting part slot is formed in the second abutting part.

[0012] As a preferred solution of the present invention, the second member includes a member connecting part and a member mounting part; the member connecting part is inserted into the low-level decorative panel slot, a member connecting part protrusion is formed at the end of the member connecting part, and the member mounting part is inserted into the abutting part slot.

[0013] As a preferred solution of the present invention, the second ceiling hanging structure includes a first nut, a second nut, and a second expansion bolt, one end of the expansion bolt is fixed on the floor slab, the other end of the expansion bolt is connected to the first nut and the second nut, and the first ceiling hanging structure includes a double-nut structure and a first expansion bolt, and the double-nut structure is fixedly connected to the channel-shaped keel.

[0014] As a preferred embodiment of the present invention, the elongated right-angle angle steel includes a first connecting plate clamped between a first nut and a second nut, and a second connecting plate vertically arranged with the first connecting plate.

[0015] As a preferred embodiment of the present invention, one side of the right-angle connecting block abuts against the side surface of the second connecting plate, the other side of the right-angle connecting block abuts against the top of the low-level decorative panel, the right-angle connecting block is connected to the second connecting plate by screws, and the right-angle connecting block is connected to the low-level decorative panel by screws.

[0016] An assembled adjustable stepped ceiling and installation method, including

[0017] Step 1: Lay out and position on the floor slab. According to the positioned positions, install a first ceiling hanging structure and a second ceiling hanging structure. Fix the upper end of the channel-shaped keel to the double-nut structure of the first ceiling hanging structure, and fix the first connecting plate of the elongated right-angle angle steel between the first nut and the second nut of the second ceiling hanging structure;

[0018] Step 2. Install a connecting member on the channel-shaped keel, insert the insertion part of the connecting member into the high-level decorative panel slot of the high-level decorative panel, and fix the other end of the high-level decorative panel to the wall;

[0019] Step 3: Install a first member on the wall near the low-level decorative panel. Insert the member connecting part of the second member into the low-level decorative panel slot of the low-level decorative panel facing this wall surface, and insert the member installation part into the abutting part slot;

[0020] Step 4: Support the bottom of the low-level decorative panel by a support member. Install a right-angle connecting block between the second connecting plate and the low-level decorative panel. Lock the second connecting plate and the right-angle connecting block by screws, lock the low-level decorative panel and the right-angle connecting block by screws, and remove the support member after installation;

[0021] Step 5: Insert the first connecting section of the snap-in line into the low-level decorative panel slot at the other end of the low-level decorative panel, and insert the insertion part of the connecting member into the slot of the second connecting section of the snap-in line, thus completing the installation of the stepped ceiling.

[0022] The beneficial effects of the present invention are:

[0023] 1. One end of the high-level decorative panel of the present invention is in plug-in fit with the connecting member, and the other end is fixedly connected to the wall; one end of the low-level decorative panel is connected to the wall through the first member and the second member, and the other end is connected to the high-level decorative panel through the snap-in line and the connecting member. The high-level decorative panel and the low-level decorative panel involve fewer screw connections, are convenient for replacement and disassembly, and do not affect the strength of the entire assembled stepped ceiling when the replaced thickness is different.

[0024] 2. The distance between the high-level decorative panel and the low-level decorative panel of the present invention is adjusted by the vertical position of the lengthened right-angle angle steel on the expansion bolt, which facilitates the design of stepped suspended ceilings with different height dimensions.

[0025] 3. The components connecting the high-level decorative panel and the low-level decorative panel of the present invention are all irregular components such as the first component, the second component, and the snap-in line. The thickness of such irregular components is small. Therefore, the high-level decorative panel and the low-level decorative panel connecting these irregular components can also use decorative panels with a small thickness, saving costs.

[0026] 4. The first connection section protrudes, realizing the limit of the first connection section in the notch of the low-level decorative panel, reducing the movement of the first connection section in the notch of the low-level decorative panel, and increasing the connection strength between the snap-in line and the low-level decorative panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is a partial enlarged view of part A of the present invention;

[0029] Figure 3 is a partial enlarged view of part B of the present invention;

[0030] Figure 4 is a schematic structural diagram of the snap-in line of the present invention;

[0031] Reference numerals in the drawings: the first top suspension structure 1, the channel-shaped keel 2, the connecting piece 3, the high-level decorative panel 4, the second top suspension structure 5, the lengthened right-angle angle steel 6, the low-level decorative panel 7, the first component 8, the second component 9, the snap-in line 10, the double-nut structure 11, the first expansion bolt 12, the connecting part 31, the inserting part 32, the notch of the high-level decorative panel 41, the first nut 51, the second nut 52, the expansion bolt 53, the first connecting plate 61, the second connecting plate 62, the notch of the low-level decorative panel 71, the first abutting part 81, the second abutting part 82, the component connecting part 91, the component mounting part 92, the right-angle connecting block 100, the first connecting section 101, the second connecting section 102, the transition section 103, the protrusion of the inserting part 321, the notch of the abutting part 821, the protrusion of the component connecting part 911, the protrusion of the first connecting section 1011, the notch of the second connecting section 1021, the receiving section 1022. DETAILED DESCRIPTION OF THE INVENTION

[0032] The embodiments of the present invention will be described in detail below with reference to the drawings.

[0033] As Figures 1-4As shown in the figure, a prefabricated adjustable dropped ceiling includes a first ceiling hanging structure 1. One end of the first ceiling hanging structure 1 is installed on the floor slab, and the other end of the first ceiling hanging structure 1 is connected to a channel-shaped keel 2. The channel-shaped keel 2 is connected to one end of a high-level decorative panel 4 through a connecting piece 3, and the other end of the high-level decorative panel 4 is fixedly connected to the wall; it includes a second ceiling hanging structure 5. One end of the second ceiling hanging structure 5 is installed on the floor slab, and the other end of the second ceiling hanging structure 5 is connected to a low-level decorative panel 7 through an extended right-angle angle steel 6 and a right-angle connecting block 100. One end of the low-level decorative panel 7 is fixedly connected to the wall through a first component 8 and a second component 9, and the other end of the low-level decorative panel 7 is connected to the connecting piece 3 through a snap-in line 10.

[0034] Specifically, the cooperation among the first ceiling hanging structure 1, the channel-shaped keel 2, the connecting piece 3, and the high-level decorative panel 4 forms the high-level board of the prefabricated dropped ceiling. The cooperation among the second ceiling hanging structure 5, the extended right-angle angle steel 6, the right-angle connecting block 100, the low-level decorative panel 7, the first component 8, and the second component 9 forms the low-level board of the prefabricated dropped ceiling. The high-level board and the low-level board are connected through a snap-in line 10, and the snap-in line 10 shields the components inside the prefabricated dropped ceiling.

[0035] The channel-shaped keel 2 is a component with a relatively heavy mass. Therefore, to ensure safety, the distance between the high-level decorative panel 4 and the low-level decorative panel 7 is adjusted by the height position of the extended right-angle angle steel 6 on the expansion bolt 53, rather than adjusting the position between the first expansion bolt 12 and the channel-shaped keel 2.

[0036] In this prefabricated dropped ceiling, the high-level decorative panel 4 is only installed by the plug-in fit with the connecting piece 3 at one end and the fixed connection at the other end, which completes the installation of the high-level decorative panel 4. The high-level decorative panel 4 is convenient to replace and disassemble, and when the replaced thickness is different, it does not affect the strength of the entire prefabricated dropped ceiling; while in this prefabricated dropped ceiling, one end of the low-level decorative panel 7 is connected to the wall through the first component 8 and the second component 9, the other end is connected to the connecting piece 3 through the snap-in line 10, and its top is connected to the extended right-angle angle steel 6 through the right-angle connecting block 100. Both ends of the low-level decorative panel 7 are plug-in fits, which are convenient to replace and disassemble; and the disassembly of the top screw connected to the right-angle connecting block 100 is not complicated either. Therefore, the disassembly and replacement of the low-level decorative panel 7 are relatively convenient, and when the replaced thickness of the low-level decorative panel 7 is different, it does not affect the strength of the entire prefabricated dropped ceiling.

[0037] The components connected to the high-level decorative panel 4 and the low-level decorative panel 7 are all irregular parts such as the first component 8, the second component 9, and the snap-in line 10. The thickness of this type of irregular part is relatively small. Therefore, the high-level decorative panel 4 and the low-level decorative panel 7 connected to this irregular part can also use decorative panels with a relatively small thickness, saving costs and supplementing the technology of the thin-layer dropped ceiling.

[0038] As Figure 1 shown, on the right side of the high-level decorative panel 4 is a line graph. Therefore, this assembled stepped ceiling can also be structured with low-level decorative panels 7 on both sides and a high-level decorative panel 4 in the middle. Both ends of the high-level decorative panel 4 are connected to the low-level decorative panel 7 through snap lines 10 and connectors 3.

[0039] The snap line 10 includes a first connection section 101, a second connection section 102, and a transition section 103 connecting the first connection section 101 and the second connection section 102. The first connection section 101 is inserted into a low-level decorative panel slot 71 formed at the end of the low-level decorative panel 7. The length dimension of the first connection section 101 is smaller than the length dimension of the low-level decorative panel slot 71. The remaining margin in the low-level decorative panel slot 71 facilitates the adjustment of the snap line 10 between the low-level decorative panel 7 and the high-level decorative panel 4. The second connection section 102 includes a second connection section slot 1021 and a receiving section 1022 between the second connection section slot 1021 and the transition section 103. The receiving section 1022 abuts against the side surface of the high-level decorative panel 4. The receiving section 1022 increases the contact area between the second connection section 102 and the high-level decorative panel 4, which is beneficial to the stable connection of the second connection section 102. At the same time, it reduces the gap between the snap line 10 and the high-level decorative panel 4 and enhances the aesthetics of this assembled stepped ceiling.

[0040] An upward first connection section protrusion 1011 is formed at the end of the first connection section 101, which realizes the limit of the first connection section 101 in the low-level decorative panel slot 71, reduces the movement amount of the first connection section 101 in the low-level decorative panel slot 71, and increases the connection strength between the snap line 10 and the low-level decorative panel 7. The transition section 103 is arranged obliquely with the first connection section 101, and the inclination angle changes according to the height change between the low-level decorative panel 7 and the high-level decorative panel 4.

[0041] The connecting member 3 includes a connecting portion 31 at the upper end and a plugging portion 32 at the lower end. The connecting portion 31 is fixedly connected to the channel-shaped keel 2. This fixed connection can include bolt connection, or various connection methods such as snap connection and magnetic attraction. One end of the plugging portion 32 is inserted into the high-level decorative panel slot 41 formed at the end of the high-level decorative panel 4, and the other end of the plugging portion 32 is inserted into the second connection section slot 1021. The plugging fit at both ends of the plugging portion 32 associates the high-level decorative panel 4 and the low-level decorative panel 7, achieving a stable connection between the high-level decorative panel 4 and the low-level decorative panel 7. Both ends of the plugging portion 32 are formed with upward plugging portion protrusions 321. The plugging portion protrusions 321 achieve the limit of the plugging portion 32 in the second connection section slot 1021 and the low-level decorative panel slot 71, reducing the movement amount of the plugging portion 32 in the second connection section slot 1021 and the low-level decorative panel slot 71, and increasing the connection strength among the high-level decorative panel 4, the low-level decorative panel 7, the snap-in strip 10, and the connecting member 3.

[0042] The first member 8 includes a first abutting portion 81 abutting against the wall surface and a second abutting portion 82 abutting against the top of the low-level decorative panel 7. The abutting section of the second abutting portion 82 abutting against the top of the low-level decorative panel 7 is relatively short to avoid interfering with the member installation portion 92 and affecting the connection effect between the first member 8 and the second member 9. An abutting portion slot 821 is formed inside the second abutting portion 82; the second member 9 includes a member connecting portion 91 and a member installation portion 92; the member connecting portion 91 is inserted into the low-level decorative panel slot 71, and a member connecting portion protrusion 911 is formed at the end of the member connecting portion 91. The member connecting portion protrusion 911 realizes the limit of the member connecting portion 91 in the low-level decorative panel slot 71, reducing the movement amount of the member connecting portion 91 in the low-level decorative panel slot 71, ensuring a stable connection between the second member 9 and the low-level decorative panel 7, and the member installation portion 92 is inserted into the abutting portion slot 821.

[0043] The second hanging structure 5 includes a first nut 51, a second nut 52, and a second expansion bolt 53. One end of the expansion bolt 53 is fixed on the floor slab, and the other end of the expansion bolt 53 is connected to the first nut 51 and the second nut 52. The positions of the first nut 51 and the second nut 52 on the expansion bolt 53 also further adjust the position of the first connecting plate 61, thereby affecting the distance between the low-level decorative panel 7 and the high-level decorative panel 4; the first hanging structure 1 includes a double-nut structure 11 and a first expansion bolt 12. The double-nut structure 11 is fixedly connected to the channel-shaped keel 2.

[0044] The elongated right-angle angle steel 6 includes a first connecting plate 61 clamped between a first nut 51 and a second nut 52, and a second connecting plate 62 arranged perpendicular to the first connecting plate 61. The setting of the elongated right-angle angle steel 6 undertakes the connection between the low-level decorative panel 7 and the second top suspension structure 5, and also facilitates the adjustment of the height of the low-level decorative panel 7.

[0045] One side of the right-angle connecting block 100 abuts against the side surface of the second connecting plate 62, and the other side of the right-angle connecting block 100 abuts against the top of the low-level decorative panel 7. The right-angle connecting block 100 is connected to the second connecting plate 62 by screws, and the right-angle connecting block 100 is connected to the low-level decorative panel 7 by screws. When replacing the low-level decorative panel 7, only the screws between the right-angle connecting block 100 and the low-level decorative panel 7 need to be removed, without adjusting the positional relationship between the elongated right-angle angle steel 6 and the low-level decorative panel 7, which improves the replacement efficiency of the low-level decorative panel 7.

[0046] An installation method for an assembled adjustable stepped ceiling, including

[0047] Step 1: Lay out and position on the floor slab, and install the first top suspension structure 1 and the second top suspension structure 5 according to the positioned positions. Fix the upper end of the channel-shaped keel 2 to the double-nut structure 11 of the first top suspension structure 1, and fix the first connecting plate 61 of the elongated right-angle angle steel 6 between the first nut 51 and the second nut 52 of the second top suspension structure 5;

[0048] Step 2. Install the connecting member 3 on the channel-shaped keel 2, insert the insertion portion 32 of the connecting member 3 into the high-level decorative panel slot 41 of the high-level decorative panel 4, and fix the other end of the high-level decorative panel 4 to the wall;

[0049] Step 3: Install the first member 8 on the wall near the low-level decorative panel 7, insert the member connecting portion 91 of the second member 9 into the low-level decorative panel slot 71 of the low-level decorative panel 7 facing this wall, and insert the member installation portion 92 into the abutting portion slot 821;

[0050] Step 4: Support the bottom of the low-level decorative panel 7 with a support member, install a right-angle connecting block 100 between the second connecting plate 62 and the low-level decorative panel 7, lock the second connecting plate 62 and the right-angle connecting block 100 with screws, lock the low-level decorative panel 7 and the right-angle connecting block 100 with screws, and remove the support member after installation;

[0051] Step 5: Insert the first connection section 101 of the snap-in line 10 into the low-level decorative panel slot 71 at the other end of the low-level decorative panel 7, and insert the insertion portion 32 of the connecting member 3 into the second connection section slot 1021 of the snap-in line 10, thus completing the installation of the stepped ceiling.

[0052] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0053] Although the terms such as the first top suspension structure 1, channel-shaped keel 2, connecting member 3, high-level decorative panel 4, second top suspension structure 5, lengthened right-angle angle steel 6, low-level decorative panel 7, first member 8, second member 9, snap line 10, double-nut structure 11, first expansion bolt 12, connecting portion 31, inserting portion 32, high-level decorative panel notch 41, first nut 51, second nut 52, expansion bolt 53, first connecting plate 61, second connecting plate 62, low-level decorative panel notch 71, first abutting portion 81, second abutting portion 82, member connecting portion 91, member mounting portion 92, right-angle connecting block 100, first connecting section 101, second connecting section 102, transition section 103, inserting portion protrusion 321, abutting portion notch 821, member connecting portion protrusion 911, first connecting section protrusion 1011, second connecting section notch 1021, and receiving section 1022 are used more frequently herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An assembled adjustable dropped ceiling, characterized in that: It includes a first top suspension structure (1), one end of the first top suspension structure (1) is installed on the floor slab, the other end of the first top suspension structure (1) is connected to a channel-shaped keel (2), the channel-shaped keel (2) is connected to one end of a high-level decorative panel (4) through a connecting member (3), and the other end of the high-level decorative panel (4) is fixedly connected to the wall; it includes a second top suspension structure (5), one end of the second top suspension structure (5) is installed on the floor slab, the other end of the second top suspension structure (5) is connected to a low-level decorative panel (7) through an extended right-angle angle steel (6) and a right-angle connection block (100), one end of the low-level decorative panel (7) is fixedly connected to the wall through a first member (8) and a second member (9), and the other end of the low-level decorative panel (7) is connected to the connecting member (3) through a snap line (10); the snap line (10) includes a first connection section (101), a second connection section (102) and a transition section (103) connecting the first connection section (101) and the second connection section (102); the first connection section (101) is inserted into a low-level decorative panel slot (71) formed at the end of the low-level decorative panel (7), the second connection section (102) includes a second connection section slot (1021) and a receiving section (1022) between the second connection section slot (1021) and the transition section (103), and the receiving section (1022) abuts against the side surface of the high-level decorative panel (4); an upward first connection section protrusion (1011) is formed at the end of the first connection section (101), and the transition section (103) is obliquely arranged with respect to the first connection section (101); the connecting member (3) includes a connection part (31) at the upper end and a plug-in part (32) at the lower end, the connection part (31) is fixedly connected to the channel-shaped keel (2), one end of the plug-in part (32) is inserted into a high-level decorative panel slot (41) formed at the end of the high-level decorative panel (4), the other end of the plug-in part (32) is inserted into the second connection section slot (1021), and upward plug-in part protrusions (321) are formed at both ends of the plug-in part (32).

2. The prefabricated adjustable dropped ceiling according to claim 1, characterized in that: The first member (8) includes a first abutting part (81) abutting against the wall surface and a second abutting part (82) abutting against the top of the low-level decorative panel (7), and an abutting part slot (821) is formed in the second abutting part (82).

3. The fabricated adjustable dropped ceiling according to claim 1, wherein: The second member (9) includes a member connection part (91) and a member installation part (92); the member connection part (91) is inserted into the low-level decorative panel slot (71), a member connection part protrusion (911) is formed at the end of the member connection part (91), and the member installation part (92) is inserted into the abutting part slot (821).

4. The prefabricated adjustable dropped ceiling according to claim 1, wherein: The second top suspension structure (5) includes a first nut (51), a second nut (52), and a second expansion bolt (53). One end of the expansion bolt (53) is fixed to the floor slab, and the other end of the expansion bolt (53) is connected to the first nut (51) and the second nut (52). The first top suspension structure (1) includes a double-nut structure (11) and a first expansion bolt (12). The double-nut structure (11) is fixedly connected to the channel-shaped keel (2).

5. The prefabricated adjustable dropped ceiling according to claim 1, wherein: The lengthened right-angle angle steel (6) includes a first connecting plate (61) clamped between the first nut (51) and the second nut (52), and a second connecting plate (62) vertically arranged with the first connecting plate (61).

6. The prefabricated adjustable stepped ceiling according to claim 1, wherein: One side of the right-angle connecting block (100) abuts against the side surface of the second connecting plate (62), and the other side of the right-angle connecting block (100) abuts against the top of the low-level decorative panel (7). The right-angle connecting block (100) is connected to the second connecting plate (62) by screws, and the right-angle connecting block (100) is connected to the low-level decorative panel (7) by screws.

7. An installation method of an assembled adjustable dropped ceiling, characterized in that, Referring to the assembled adjustable stepped ceiling as described in any one of claims 1-6, comprising Step 1: Lay out and position on the floor slab. Install the first top suspension structure (1) and the second top suspension structure (5) according to the positioned positions. Fix the upper end of the channel-shaped keel (2) to the double-nut structure (11) of the first top suspension structure (1), and fix the first connecting plate (61) of the lengthened right-angle angle steel (6) between the first nut (51) and the second nut (52) of the second top suspension structure (5); Step 2. Install the connecting member (3) on the channel-shaped keel (2), insert the insertion portion (32) on the connecting member (3) into the high-level decorative panel slot (41) of the high-level decorative panel (4), and the other end of the high-level decorative panel (4) is fixedly connected to the wall; Step 3: Install the first member (8) on the wall close to the low-level decorative panel (7). Insert the member connecting portion (91) of the second member (9) into the low-level decorative panel slot (71) of the low-level decorative panel (7) facing this wall, and insert the member installation portion (92) into the abutting portion slot (821); Step 4: Support the bottom of the low-level decorative panel (7) by a support member. Install the right-angle connecting block (100) between the second connecting plate (62) and the low-level decorative panel (7), lock the second connecting plate (62) and the right-angle connecting block (100) by screws, lock the low-level decorative panel (7) and the right-angle connecting block (100) by screws, and remove the support member after installation; Step 5: Insert the first connection section (101) of the snap-in line (10) into the low-level decorative panel slot (71) at the other end of the low-level decorative panel (7), and insert the insertion portion (32) of the connecting member (3) into the second connection section slot (1021) of the snap-in line (10), thus completing the installation of the stepped ceiling.

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