Construction method of light steel keel autoclaved calcium silicate board suspended ceiling

Abstract

The invention discloses a light steel keel autoclaved calcium silicate board suspended ceiling construction method, and relates to the technical field of light steel keel suspended ceiling construction.The light steel keel autoclaved calcium silicate board suspended ceiling construction method comprises four hoisting lead screws, the top ends of the four hoisting lead screws are fixedly installed on a top plate through expansion bolts, and hook-shaped hanging pieces are fixedly installed at the bottom ends of the hoisting lead screws; a main keel frame is placed in every two adjacent hook-shaped hanging pieces, two auxiliary keel frames are fixedly installed at the bottom ends of the two main keel frames through rotating buckle assemblies, and a calcium silicate ceiling plate is installed between the two auxiliary keel frames. By arranging the rotating buckle assemblies, multi-dimensional fixing is achieved, the displacement resistance of the structure is improved, the main keel frame and the auxiliary keel frame are connected through the rotating buckle assemblies, buckle rods are embedded into arc-shaped grooves of positioning supporting blocks, first compression springs are matched to push limiting ejecting blocks to press rotating rods, and dual fixing of horizontal buckle and vertical ejecting is formed; and transverse deviation and longitudinal looseness of the keel during vibration or stress are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of light steel keel suspended ceiling construction, in particular to a light steel keel autoclaved calcium silicate plate suspended ceiling construction method. BACKGROUND

[0002] The light steel keel and calcium silicate plate combined suspended ceiling structure is widely used in various architectural spaces due to its light weight, good fire resistance and other characteristics. However, in the light steel keel autoclaved calcium silicate plate suspended ceiling construction and structure design in the prior art, the following problems still exist.

[0003] For example, the patent document with publication number CN119411742A discloses a light steel keel paper-faced gypsum board suspended ceiling structure. The main and auxiliary keel frames in the structure rely on bolt multi-point fastening connection. During installation, the bolt position and tightness need to be adjusted repeatedly, which is not only complicated in operation steps, but also consumes manpower and time. Moreover, the keel connection stability is poor due to uneven bolt fastening, the bolts are prone to looseness, which leads to keel lateral deviation and longitudinal looseness, and further causes the overall deformation of the suspended ceiling.

[0004] Secondly, the connection between the calcium silicate suspended plate and the auxiliary keel frame is mostly simple lapping, lacking effective and stable reinforcing structures, which is prone to edge warping and displacement problems, affecting the appearance flatness and use safety of the suspended ceiling. SUMMARY

[0005] The present application aims to provide a light steel keel autoclaved calcium silicate plate suspended ceiling construction method to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a light steel keel autoclaved calcium silicate plate suspended ceiling structure, comprising four hoisting lead screws, the top ends of the four hoisting lead screws being fixedly installed on a top plate through expansion bolts, the bottom ends of the hoisting lead screws being fixedly installed with hook-shaped hangers, one main keel frame being placed inside each of two adjacent hook-shaped hangers, two auxiliary keel frames being fixedly installed at the bottom ends of the two main keel frames through a rotating buckle assembly, a calcium silicate suspended plate being installed between the two auxiliary keel frames, the main keel frame being in a C shape, the auxiliary keel frame being in an I shape, and the left and right ends of the calcium silicate suspended plate being placed at the bottom of the side recesses of the two auxiliary keel frames.

[0007] Preferably, two rotation through holes that are mutually symmetrical in position are formed on the upper surface of the auxiliary keel frame, the rotating buckle assembly comprises a rotating rod rotatably arranged on the inner wall of the rotation through hole, and a positioning support block fixedly connected to the inner bottom of the main keel frame, a buckle rod is fixedly connected to the side surface of the rotating rod, the buckle rod and the rotating rod form a 90-degree angle, an arc-shaped groove is formed on the upper surface of the positioning support block, the positioning support block is in a position corresponding to the rotating rod, the size of the arc-shaped groove matches the buckle rod, and the buckle rod is placed inside the arc-shaped groove.

[0008] Preferably, the rotating buckle assembly further comprises a rectangular fixed shell fixedly connected to the top inner side of the main keel frame, the rectangular fixed shell is in an open-bottom structure, and the inner wall of the rectangular fixed shell is slidably provided with a limiting top block, the position of the limiting top block corresponds to the rotating rod, and the bottom end of the limiting top block is overlapped with the top of the rotating rod, the lower surface of the limiting top block is fixedly connected with a rubber non-slip pad, the top end of the rotating rod is tightly abutted against the surface of the rubber non-slip pad, and the limiting top block is used for limiting the rotating rod in the vertical direction.

[0009] Preferably, the inside of the rectangular fixed shell is provided with a first compression spring, the top end of the first compression spring is fixedly connected with the inner top wall of the rectangular fixed shell, and the bottom end of the first compression spring is fixedly connected with the upper surface of the limiting top block, and the lower surface of the main keel frame is provided with two arc-shaped mounting grooves matched with the rotating rod.

[0010] Preferably, the two sides of the rectangular fixed shell are provided with strip-shaped limiting holes which are symmetrically arranged, the top two sides of the limiting top block are fixedly connected with strip-shaped sliding blocks, the size of the strip-shaped limiting hole is matched with the strip-shaped sliding block, and the strip-shaped sliding block is slidably connected with the inner wall of the strip-shaped limiting hole.

[0011] Preferably, the lower surface of the auxiliary keel frame is provided with two quarter-circular rotating limiting grooves, the position of the rotating limiting groove corresponds to the rotating through hole, and the bottom end of the rotating rod is fixedly connected with a rotating limiting block, the length of the rotating limiting block is matched with the rotating limiting groove, the rotating limiting block is slidably connected with the inner wall of the rotating limiting groove, and the bottom end of the rotating rod is provided with a hexagonal nut hole, and the rotating range of the rotating rod can be limited within 90 degrees by the rotating limiting groove.

[0012] Preferably, the inner side of the auxiliary keel frame is provided with two rectangular guide holes, the inner wall of the rectangular guide hole is fixedly connected with a guide rod, the surface of the guide rod is slidably sleeved with a positioning pressing plate, the lower surface of the positioning pressing plate is fixedly provided with two rubber clamping blocks, the surface of the guide rod is sleeved with a second compression spring, and the bottom end of the second compression spring is fixedly connected with the upper surface of the positioning pressing plate.

[0013] Preferably, the upper surface of the calcium silicate ceiling plate is provided with four positioning grooves, the four positioning grooves are symmetrically distributed in two groups on the surface of the calcium silicate ceiling plate, the position of the positioning groove corresponds to the positioning pressing plate, the size of the positioning groove is matched with the rubber clamping block, and the rubber clamping block is inserted and installed in the inner wall of the positioning groove.

[0014] Preferably, the upper surface of the hook-shaped hanging piece is provided with a mounting hole matched with the lifting screw rod, the lifting screw rod is inserted into the mounting hole, and the bottom of the lifting screw rod is threadedly connected with two locking nuts, the side surface of the hook-shaped hanging piece is provided with a through hole, a limiting screw rod is inserted into the inner wall of the through hole, the limiting screw rod is located above the auxiliary keel frame, the surface of the limiting screw rod is provided with a damping rubber block, the lower surface of the damping rubber block is overlapped with the upper surface of the auxiliary keel frame, and one end of the limiting screw rod is locked and fixed with the surface of the hook-shaped hanging piece through a limiting nut.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] (1) The rotation buckle assembly is arranged, multi-dimensional fixing is realized, the structure displacement resistance is improved, the main keel frame and the auxiliary keel frame are connected through the rotation buckle assembly, the buckle rod is embedded into the arc-shaped groove of the positioning support block, the limiting top block is pushed to compress the rotation rod in cooperation with the first compression spring, horizontal buckling + vertical compression double fixing is formed, and transverse deviation and longitudinal loosening of the keel are avoided when the keel is vibrated or stressed. The calcium silicate suspended ceiling plate is not only supported on the side concave bottom of the auxiliary keel frame, but also is inserted into the plate body positioning groove through the rubber clamping block of the positioning pressing plate, and the plate body is tightly attached to the keel in cooperation with the continuous pressure of the second compression spring, so that the edge lifting and displacement of the suspended ceiling plate are effectively prevented.

[0017] (2) The quarter circular rotation limiting groove is arranged at the bottom of the auxiliary keel frame, the rotation limiting block of the rotation rod is cooperated, the rotation range of the rotation rod is strictly limited within 90 degrees, the buckle rod can be accurately aligned with the arc-shaped groove, the connection failure caused by the rotation angle deviation is avoided, and the installation error is reduced. When the overall light steel keel structure is installed, a large number of complex accessories and a large number of bolts are not needed, the single keel connection time is greatly shortened, and the construction efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a first perspective structure schematic view of the present application;

[0019] Figure 2 It is a second perspective structure schematic view of the present application;

[0020] Figure 3 It is a third perspective structure schematic view of the present application;

[0021] Figure 4 It is a partial sectional structure schematic view of the auxiliary keel frame of the present application;

[0022] Figure 5 It is a bottom perspective structure schematic view of the auxiliary keel frame of the present application;

[0023] Figure 6 It is Figure 2 It is an enlarged structure schematic view of position A in the auxiliary keel frame.

[0024] Figure 7 For Figure 3 Enlarged structural diagram at B;

[0025] Figure 8 For Figure 4 Enlarged structural diagram at C.

[0026] In the figure: 1, lifting screw; 2, hook-shaped hanging part; 3, main keel frame; 4, rotating buckle assembly; 5, auxiliary keel frame; 6, calcium silicate suspended ceiling plate;

[0027] 101, locking nut;

[0028] 201, limiting screw; 202, shock-absorbing rubber block;

[0029] 301, arc-shaped mounting groove;

[0030] 401, rotating rod; 402, positioning support block; 403, buckle rod; 404, arc-shaped groove; 405, rectangular fixed shell; 406, limiting top block; 407, rubber non-slip pad; 408, first compression spring; 409, strip-shaped limiting hole; 410, strip-shaped sliding block; 411, rotating limiting block; 412, hexagonal nut hole;

[0031] 501, rotating through hole; 502, rotating limiting groove; 503, rectangular guide hole; 504, guide rod; 505, positioning pressing plate; 506, rubber clamping block; 507, second compression spring;

[0032] 601, positioning groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described 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, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Please refer to Figures 1-8 The present application provides a technical solution: a light steel keel autoclaved calcium silicate plate suspended ceiling structure, mainly composed of a lifting screw 1, a hook-shaped hanging part 2, a main keel frame 3, a rotating buckle assembly 4, an auxiliary keel frame 5, a calcium silicate suspended ceiling plate 6 and related supporting components.

[0035] Four hoisting lead screws 1 are provided, top ends of the hoisting lead screws 1 are fixedly installed on the top plate through expansion bolts, hook-shaped hangers 2 are fixedly installed at bottom ends of the hoisting lead screws 1, upper surfaces of the hook-shaped hangers 2 are provided with mounting holes matched with the hoisting lead screws 1, the hoisting lead screws 1 are inserted into the mounting holes, and two locking nuts 101 are threadedly connected at bottom portions of the hoisting lead screws 1, through bidirectional locking of the two locking nuts 101, firm fixing of the hook-shaped hangers 2 and the hoisting lead screws 1 is realized, and upward and downward sliding of the hook-shaped hangers 2 on the hoisting lead screws 1 is prevented.

[0036] Through holes are provided in side surfaces of the hook-shaped hangers 2, limit screws 201 are inserted into inner walls of the through holes, and the limit screws 201 are located above the subsequent secondary keel frames 5. Shock-absorbing rubber blocks 202 are sleeved on surfaces of the limit screws 201, when the secondary keel frames 5 are installed in place, lower surfaces of the shock-absorbing rubber blocks 202 are lapped with upper surfaces of the secondary keel frames 5, and a buffering and shock-absorbing effect is achieved. One end of each limit screw 201 is locked and fixed with a surface of the hook-shaped hanger 2 through a limit nut, the position of the secondary keel frame 5 is further limited, and the stability of the overall structure is enhanced.

[0037] The main keel frame 3 has a C-shaped structure, and is installed in dependence on the hook-shaped hangers 2. One main keel frame 3 is placed in the interiors of two adjacent hook-shaped hangers 2, that is, each main keel frame 3 is supported by two hook-shaped hangers 2, stable placement of the main keel frame 3 in the horizontal direction is ensured, and uneven stress caused by single-point support is avoided. The main keel frame 3 serves as a main horizontal load-bearing structure of the suspended ceiling, and provides basic support for subsequent installation of the secondary keel frame 5.

[0038] In addition, two arc-shaped mounting grooves 301 are provided in a lower surface of the main keel frame 3, the arc-shaped mounting grooves 301 are provided to cooperate with installation of the rotating rod 401 in the rotating buckle assembly 4, the rotating rod 401 can smoothly pass through the main keel frame 3, and connection of the main keel frame 3 and the secondary keel frame 5 is realized.

[0039] The rotating buckle assembly 4 comprises a rotating rod 401, two rotating through holes 501 symmetrically arranged at the upper surface of the secondary keel frame 5, and the rotating rod 401 is rotatably arranged on the inner wall of the rotating through hole 501, that is, the rotating rod 401 can rotate in the rotating through hole 501 to provide a basis for subsequent buckle fixing. A rotating limiting block 411 is fixedly connected to the bottom end of the rotating rod 401, and two quarter-circular rotating limiting grooves 502 are arranged on the lower surface of the secondary keel frame 5, the positions of the rotating limiting grooves 502 correspond to the rotating through holes 501, and the rotating limiting block 411 is slidably connected with the inner wall of the rotating limiting groove 502, and the rotating range of the rotating rod 401 is strictly controlled within 90 degrees by limiting the sliding range of the rotating limiting block 411 in the rotating limiting groove 502. Meanwhile, a hexagonal nut hole 412 is arranged at the bottom end of the rotating rod 401, so as to facilitate the rotation of the rotating rod 401 by a hexagonal tool.

[0040] A buckle rod 403 is fixedly connected to the side surface of the rotating rod 401, and the buckle rod 403 and the rotating rod 401 form a 90-degree angle. A positioning support block 402 is fixedly connected to the inner bottom of the main keel frame 3, and the position of the positioning support block 402 corresponds to the rotating rod 401, and an arc-shaped groove 404 is arranged on the upper surface of the positioning support block 402, and the size of the arc-shaped groove 404 matches the buckle rod 403. When the rotating rod 401 rotates to a specific angle, the buckle rod 403 can be placed in the arc-shaped groove 404, so as to realize the buckle fixing of the main keel frame 3 and the secondary keel frame 5 in the horizontal direction.

[0041] A rectangular fixed shell 405 is fixedly connected to the inner top of the main keel frame 3, and the rectangular fixed shell 405 has an open bottom structure. A limiting top block 406 is slidably arranged on the inner wall of the rectangular fixed shell 405, and the position of the limiting top block 406 corresponds to the rotating rod 401. The bottom end of the limiting top block 406 is overlapped with the top of the rotating rod 401, so as to limit the rotating rod 401 in the vertical direction. A rubber anti-skid pad 407 is fixedly connected to the lower surface of the limiting top block 406, and the top end of the rotating rod 401 abuts against the surface of the rubber anti-skid pad 407. The friction between the limiting top block 406 and the rotating rod 401 is increased by the rubber anti-skid pad 407, so as to further improve the vertical limiting effect.

[0042] A first compression spring 408 is arranged inside the rectangular fixed shell 405, the top end of the first compression spring 408 is fixedly connected with the inner top wall of the rectangular fixed shell 405, and the bottom end of the first compression spring 408 is fixedly connected with the upper surface of the limiting top block 406. Through the elastic force of the first compression spring 408, the limiting top block 406 is continuously pushed downward to press the rotating rod 401, so that the stability of the vertical direction limiting is ensured. At the same time, strip-shaped limiting holes 409 are formed on both sides of the rectangular fixed shell 405, the positions of which are symmetrical to each other, strip-shaped sliding blocks 410 are fixedly connected to the top of both sides of the limiting top block 406, the size of the strip-shaped limiting hole 409 is matched with the strip-shaped sliding block 410, and the strip-shaped sliding block 410 is slidingly connected with the inner wall of the strip-shaped limiting hole 409. Through the sliding of the strip-shaped sliding block 410 in the strip-shaped limiting hole 409, the sliding direction of the limiting top block 406 is limited, so that the deviation of the limiting top block 406 in the sliding process is prevented.

[0043] The sub-keel frame 5 is in an I-shaped structure, and the two sub-keel frames 5 are fixedly installed at the bottom ends of the two main keel frames 3 through the rotating buckle assembly 4, that is, every two main keel frames 3 correspondingly support two sub-keel frames 5, so as to form a horizontally distributed keel frame structure. The calcium silicate ceiling plate 6 is installed between the two sub-keel frames 5, and the left and right ends of the calcium silicate ceiling plate 6 are placed at the side concave bottom of the sub-keel frame 5, and the side concave bottom of the sub-keel frame 5 provides a basic support for the calcium silicate ceiling plate 6.

[0044] In order to further enhance the connection stability of the calcium silicate ceiling plate 6 and the sub-keel frame 5, two rectangular guide holes 503 are formed in the inner side of the sub-keel frame 5, the inner wall of the rectangular guide hole 503 is fixedly connected with a guide rod 504, the surface of the guide rod 504 is slidingly sleeved with a positioning pressing plate 505, and two rubber clamping blocks 506 are fixedly arranged on the lower surface of the positioning pressing plate 505.

[0045] Four positioning grooves 601 are formed on the upper surface of the calcium silicate ceiling plate 6, the four positioning grooves 601 are symmetrically distributed on the surface of the calcium silicate ceiling plate 6 in two groups, the positions of the positioning grooves 601 correspond to the positioning pressing plate 505, the size of the positioning groove 601 is matched with the rubber clamping block 506, and the rubber clamping block 506 is inserted and installed in the inner wall of the positioning groove 601. A second compression spring 507 is sleeved on the surface of the guide rod 504, the bottom end of the second compression spring 507 is fixedly connected with the upper surface of the positioning pressing plate 505, and through the elastic force of the second compression spring 507, the positioning pressing plate 505 is pushed downward to press the calcium silicate ceiling plate 6, so that the rubber clamping block 506 is stably inserted into the positioning groove 601, and the connection between the calcium silicate ceiling plate 6 and the sub-keel frame 5 is realized.

[0046] The light steel keel autoclaved calcium silicate plate ceiling construction method comprises the following steps:

[0047] 1、Non-asbestos autoclaved silicate board preparation: first, the colorimetric method is used to select and classify the color of non-asbestos autoclaved silicate board, to ensure that the selected board has consistent color and avoid obvious color difference after the subsequent ceiling installation, which affects the overall decorative effect. At the same time, the surface of the base layer of the prepared non-asbestos autoclaved silicate board finish is cleaned to remove dust, dirt, debris and other impurities, ensuring that the base layer surface is flat and clean, providing a good foundation for subsequent stud installation and board laying.

[0048] 2、Base preparation: according to the requirements of the design drawings and the actual space size of the construction site, the position line and the block line of the non-asbestos autoclaved silicate board stud are popped out on the base wall and ceiling. The position line is used to determine the installation position of the stud, ensuring that the stud is arranged in order and the spacing meets the design requirements; the block line is used to divide the laying area of the calcium silicate ceiling board 6, ensuring that the joints are neat and beautiful when the board is laid. After the line is popped, the surface of the wall is cleaned again to remove dust, dirt and other impurities generated during the line popping process, to avoid impurities affecting the accuracy and firmness of the stud installation.

[0049] 3、Hoisting and hanging line: according to the design drawing requirements, before the installation of the autoclaved silicate board stud, first use the theodolite to draw the vertical control line of the large angle two faces, the vertical control line is popped at a position 20 cm away from the large angle. The function of this control line is to serve as a reference for checking the accuracy of the vertical hanging line at any time during the subsequent installation process, to ensure the flatness and perpendicularity of the overall ceiling in the vertical direction. Then, the upper end of the hoisting screw rod 1 is hung on the special hanging line angle steel frame, which is fixed on the top end of the large angle through expansion bolts, forming the top suspension foundation of the hoisting screw rod 1.

[0050] 4、Main stud installation: place two main stud frames 3 inside four hook-shaped hangers 2, and place each main stud frame 3 inside two adjacent hook-shaped hangers 2, so that the two hook-shaped hangers 2 jointly support and fix one main stud frame 3. After the main stud frame 3 is placed in position, the limiting screw 201 is inserted into the through hole on the surface of the hook-shaped hanger 2, and then the limiting nut is used to lock and fix the limiting screw 201. During the locking process of the limiting screw 201, ensure that the lower surface of the shock-absorbing rubber block 202 fitted on the surface of the limiting screw 201 is tightly lapped with the upper surface of the main stud frame 3. Through the buffering effect of the shock-absorbing rubber block 202, the displacement of the main stud frame 3 under stress or vibration is reduced, and at the same time, through the cooperation of the limiting screw 201 and the limiting nut, the position of the main stud frame 3 is further limited.

[0051] 5、Sub keel installation: two sub keel frame 5 is placed symmetrically at the bottom of two main keel frame 3, in the process of placing, ensure that the upper surface of the sub keel frame 5 rotating hole 501 and the lower surface of the main keel frame 3 arc-shaped installation slot 301 position corresponding. Subsequently, the surface of the sub keel frame 5 rotating rod 401 through the arc-shaped installation slot 301 at the bottom of the main keel frame 3, in the process of rotating rod 401 through the arc-shaped installation slot 301, the top end of the rotating rod 401 will push the limiting top block 406 located in the rectangular fixed shell 405, limiting top block 406 under the action of the thrust of rotating rod 401, the limiting top block 406 slides up, while compressing the first compression spring 408. When the rotating rod 401 completely through the arc-shaped installation slot 301, using a hexagonal tool inserted into the hexagonal nut hole 412 at the bottom of the rotating rod 401, rotating the rotating rod 401, because the rotating limiting block 411 at the bottom of the rotating rod 401 in the sub keel frame 5 lower surface of the rotating limiting groove 502 slide, and the rotating limiting groove 502 is a quarter of a circle, therefore the rotating range of the rotating rod 401 is limited within 90 degrees. When the rotating rod 401 rotates 90 degrees, the buckle rod 403 fixed on the side of the rotating rod 401 is just rotated to the arc-shaped groove 404 on the upper surface of the positioning support block 402, stop rotating the rotating rod 401 at this time. Under the action of the elastic restoring force of the first compression spring 408, the limiting top block 406 slides down, the rubber anti-skid pad 407 on the lower surface of the limiting top block 406 is tightly abutted with the top end of the rotating rod 401, which limits the rotating rod 401 in the vertical direction; at the same time, the buckle rod 403 enters the inside of the arc-shaped groove 404 under the action of its own gravity and the indirect force of the first compression spring 408, completing the installation of the sub keel frame 5.

[0052] 6、Calcium silicate ceiling plate installation: the two ends of the calcium silicate ceiling plate 6 are placed on the side concave bottom of the two sub keel frames 5, respectively, and the side concave bottom of the sub keel frame 5 provides preliminary support for the calcium silicate ceiling plate 6. In the process of placing the calcium silicate ceiling plate 6, ensure that the positioning groove 601 on the upper surface of the calcium silicate ceiling plate 6 corresponds to the rubber block 506 on the lower surface of the inner positioning plate 505 of the sub keel frame 5. Because the second compression spring 507 is sleeved on the surface of the guide rod 504, and the bottom end of the second compression spring 507 is fixedly connected with the upper surface of the positioning plate 505, under the action of the elastic force of the second compression spring 507, the positioning plate 505 slides down, and the rubber block 506 on the lower surface of the positioning plate 505 gradually inserts into the positioning groove 601 on the surface of the calcium silicate ceiling plate 6. With the continuous pressing of the positioning plate 505, the rubber block 506 is completely inserted and installed in the inner wall of the positioning groove 601, and at the same time, the positioning plate 505 continuously presses the calcium silicate ceiling plate 6, realizing the pressing and limiting of the calcium silicate ceiling plate 6, and completing the installation of the entire light steel keel autoclaved calcium silicate plate ceiling.

Claims

1. A light steel keel autoclaved calcium silicate board ceiling structure, comprising four suspension screw rods (1), characterized in that: The top ends of the four hoisting screws (1) are fixedly installed on the top plate by expansion bolts. The bottom ends of the hoisting screws (1) are fixedly installed with hook-shaped hangers (2), and a main keel frame (3) is placed inside the two adjacent hook-shaped hangers (2). The bottom ends of the two main keel frames (3) are fixedly installed with two secondary keel frames (5) by rotating buckle assembly (4). A calcium silicate ceiling plate (6) is installed between the two secondary keel frames (5). The main keel frame (3) is C-shaped, and the secondary keel frame (5) is I-shaped. The left and right ends of the calcium silicate ceiling plate (6) are placed at the bottom of the concave side of the two secondary keel frames (5).

2. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 1, characterized in that: The upper surface of the secondary keel frame (5) has two symmetrically positioned rotating through holes (501). The rotating buckle assembly (4) includes a rotating rod (401) rotatably disposed on the inner wall of the rotating through hole (501) and a positioning support block (402) fixedly connected to the bottom inner side of the main keel frame (3). A buckle rod (403) is fixedly connected to the side of the rotating rod (401). The buckle rod (403) and the rotating rod (401) form a 90-degree angle. The upper surface of the positioning support block (402) has an arc-shaped groove (404), and the position of the positioning support block (402) corresponds to that of the rotating rod (401). The size of the arc-shaped groove (404) matches that of the buckle rod (403), and the buckle rod (403) is placed inside the arc-shaped groove (404).

3. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 2, characterized in that: The rotating buckle assembly (4) also includes a rectangular fixing shell (405) fixedly connected to the top of the inner side of the main keel frame (3). The rectangular fixing shell (405) has a bottom opening structure, and a limiting top block (406) is slidably provided on the inner wall of the rectangular fixing shell (405). The position of the limiting top block (406) corresponds to the rotating rod (401), and the bottom end of the limiting top block (406) overlaps with the top of the rotating rod (401). A rubber anti-slip pad (407) is fixedly connected to the lower surface of the limiting top block (406). The top end of the rotating rod (401) abuts against the surface of the rubber anti-slip pad (407). The limiting top block (406) is used to limit the rotating rod (401) in the vertical direction.

4. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 3, characterized in that: The rectangular fixed shell (405) is provided with a first compression spring (408) inside. The top end of the first compression spring (408) is fixedly connected to the inner top wall of the rectangular fixed shell (405), and the bottom end of the first compression spring (408) is fixedly connected to the upper surface of the limiting top block (406). The lower surface of the main keel frame (3) is provided with two arc-shaped mounting grooves (301), and the size of the arc-shaped mounting grooves (301) matches the rotating rod (401).

5. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 4, characterized in that: The rectangular fixed shell (405) has symmetrically positioned strip-shaped limiting holes (409) on both sides. The top two sides of the limiting top block (406) are fixedly connected to strip-shaped sliders (410). The size of the strip-shaped limiting hole (409) matches the size of the strip-shaped slider (410), and the strip-shaped slider (410) is slidably connected to the inner wall of the strip-shaped limiting hole (409).

6. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 5, characterized in that: The lower surface of the secondary keel frame (5) has two quarter-circular rotating limiting grooves (502), the positions of which correspond to the rotating through holes (501). A rotating limiting block (411) is fixedly connected to one side of the bottom end of the rotating rod (401). The length of the rotating limiting block (411) matches that of the rotating limiting groove (502). The rotating limiting block (411) is slidably connected to the inner wall of the rotating limiting groove (502). A hexagonal nut hole (412) is provided at the bottom end of the rotating rod (401). The rotating limiting groove (502) can limit the rotation range of the rotating rod (401) to within 90 degrees.

7. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 6, characterized in that: The inner side of the secondary keel frame (5) has two rectangular guide holes (503). A guide rod (504) is fixedly connected to the inner wall of the rectangular guide hole (503). A positioning pressure plate (505) is slidably sleeved on the surface of the guide rod (504). Two rubber blocks (506) are symmetrically fixed on the lower surface of the positioning pressure plate (505). A second compression spring (507) is sleeved on the surface of the guide rod (504). The bottom end of the second compression spring (507) is fixedly connected to the upper surface of the positioning pressure plate (505).

8. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 7, characterized in that: The upper surface of the calcium silicate ceiling board (6) is provided with four positioning grooves (601). The four positioning grooves (601) are symmetrically distributed on the surface of the calcium silicate ceiling board (6) in pairs. The position of the positioning grooves (601) corresponds to the positioning pressure plate (505). The size of the positioning grooves (601) matches the rubber clips (506). The rubber clips (506) are inserted and installed on the inner wall of the positioning grooves (601).

9. The light steel keel autoclaved calcium silicate board ceiling structure according to claim 8, characterized in that: The upper surface of the hook-shaped hanger (2) is provided with an installation hole that matches the lifting screw (1). The lifting screw (1) is inserted into the installation hole, and the bottom of the lifting screw (1) is threaded with two locking nuts (101). The side of the hook-shaped hanger (2) is provided with a through hole, and a limiting screw (201) is inserted into the inner wall of the through hole. The limiting screw (201) is located above the secondary keel frame (5). The surface of the limiting screw (201) is covered with a shock-absorbing rubber block (202). The lower surface of the shock-absorbing rubber block (202) overlaps with the upper surface of the secondary keel frame (5). One end of the limiting screw (201) is locked and fixed to the surface of the hook-shaped hanger (2) by a limiting nut.

10. A method for constructing a light steel keel autoclaved calcium silicate board ceiling, used to implement the tensioned metal mesh ceiling system described in any one of claims 1-9, characterized in that: S1. Preparation of asbestos-free autoclaved silicate board: First, use colorimetry to select and classify the colors of the asbestos-free autoclaved silicate board, requiring that the colors be consistent. Clean the base surface of the substrate to be finished with the asbestos-free autoclaved silicate board. S2. Base preparation: According to the design drawings and actual needs, mark the position lines and block lines for installing the asbestos-free autoclaved silicate board keel, and then clean the dust and dirt off the wall surface. S3. Hanging and stringing: Before installing the autoclaved silicate board keel according to the design drawings, use a theodolite to mark the vertical control lines on the two sides of the corner, and mark them 20cm away from the corner so as to check the accuracy of the vertical stringing at any time. Hang the upper end of the hoisting screw on the special stringing angle steel frame, and fix the angle steel frame to the top of the corner with expansion bolts, and mark the upper and lower control lines. S4. Main keel installation: Place the two main keel frames inside the four hook-shaped brackets respectively, so that the two hook-shaped brackets correspond to one main keel frame. Then, insert the limiting screw into the through hole on the surface of the hook-shaped bracket and lock it in place with the limiting nut. At the same time, the shock-absorbing rubber block limits the top of the main keel frame. S5. Secondary keel installation: Place two secondary keel frames symmetrically at the bottom of the two main keel frames, and pass the rotating rod on the surface of the secondary keel frame through the arc-shaped mounting groove at the bottom of the main keel frame. Push the top of the rotating rod upward to the limiting block, and then rotate the rotating rod 90 degrees so that the buckle rod rotates above the arc-shaped groove. Then, under the action of the first compression spring, push the buckle rod into the arc-shaped groove, thereby completing the quick fixation between the secondary keel frame and the main keel frame. S6. Installation of calcium silicate ceiling panels: Place both ends of the calcium silicate ceiling panels at the bottom of the grooves on the side of the secondary keel frame. Use the base plate of the secondary keel frame to provide some support for the calcium silicate ceiling panels. Then, use the second compression spring to drive the positioning plate downward to press and limit the calcium silicate ceiling panels. At the same time, use rubber clips to insert into the positioning grooves on the surface of the calcium silicate ceiling panels to further improve the limiting effect of the calcium silicate ceiling panels.

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