Fabricated fast-assembly keel and suspended ceiling

Abstract

The invention relates to an assembly type fast-assembly keel and a suspended ceiling. The assembly type fast-assembly keel comprises a first transverse keel, a second transverse keel and a third transverse keel which are assembled and connected; the second transverse keel is mounted below the first transverse keel through the vertical keel; the third transverse keel is perpendicular to the second transverse keel and is mounted below the second transverse keel; a first flange end is arranged at the upper end of the vertical keel, and an arc notch is formed in the position, connected with the first transverse keel, of the first flange end. And the first flange end is connected with the first transverse keel through a first connecting bolt penetrating through the arc notch. Through assembly type connection among the first transverse keel, the vertical keel, the second transverse keel and the third transverse keel, the angles of the second transverse keel and the third transverse keel can be changed relative to the first transverse keel; therefore, when the I-shaped steel beams at the top are not parallel any more, the arrangement of the second transverse keel and the third transverse keel is not affected by the extending direction of the I-shaped steel beams, and the installation difficulty is lowered.

Description

Technical Field

[0001] The invention relates to the field of building decoration, and in particular to an assembled quick-install keel and a suspended ceiling. Background Art

[0002] The top of the building generally needs to be used for installation of suspended ceilings, air ducts and other equipment. In order to prevent the length of the suspension rods of the structures in the space from exceeding the construction requirements, it is necessary to install a steel frame transfer layer on the top of the building, and then carry out construction under the steel frame transfer layer. In some large venues, hotel lobbies, conference halls and other buildings, the internal space is relatively large, and an I-beam is usually set on the top of the concrete structure, and the transfer layer steel frame is installed under the I-beam. Prior art, such as the utility model patent with announcement number CN217517823U, discloses an I-beam steel truss transfer layer connection device, in which the connection device is clamped on the flange plate at the lower end of the I-beam through a bow-shaped pressure plate, and then the transfer layer is connected to the lower end of the support rod of the connection device.

[0003] The interior of a conventional venue presents a relatively regular geometric shape, such as a rectangle, and its I-beams are usually set parallel to each other. However, for some special-shaped structural designs, such as an unfolded folding fan, the I-beams are arranged along the direction of the fan's ribs. If the transfer layer is arranged directly along the extension direction of the I-beams, the steel frame of the transfer layer will appear uneven, increasing the difficulty of installing the steel frame of the transfer layer, and the force on the transfer layer cross frame will become unbalanced and unstable. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an assembled quick-install keel and suspended ceiling. Through the structural design of the keel, the installation of the transfer layer steel frame is no longer restricted by the inconsistent extension direction of the I-beam beam, thereby reducing the installation difficulty and improving the installation efficiency.

[0005] The technical objectives of the present invention are achieved through the following technical solutions:

[0006] An assembled quick-install keel comprises a first transverse keel, a second transverse keel and a third transverse keel; the first transverse keel is installed at the lower end of an I-beam; a vertical keel is connected between the second transverse keel and the first transverse keel, two ends of the vertical keel are respectively connected to the first transverse keel and the second transverse keel, and the second transverse keel is installed below the first transverse keel through the vertical keel; the third transverse keel is installed perpendicular to the second transverse keel and below the second transverse keel; the first transverse keel, the second transverse keel, the third transverse keel and the vertical keel are assembled and connected;

[0007] A first flange end is provided at the upper end of the vertical keel, and the first flange end has a flange end plate and a connecting sleeve. The connecting sleeve is vertically fixed to the middle of the flange end plate, and the flange end plate forms connecting wing plates on both sides of the connecting sleeve; the upper end of the vertical keel is inserted into the connecting sleeve and connected and fixed with the connecting sleeve, and arc notches are respectively provided on the connecting wing plates on both sides of the connecting sleeve, and the bending directions of the arc notches on the connecting wing plates on both sides are arranged relatively;

[0008] A first connecting bolt is connected between the first transverse keel and the connecting wing plate. The first connecting bolt passes through the arc groove. The connecting wing plates on both sides of the connecting sleeve are respectively connected to the first transverse keel through the first connecting bolt; a second connecting bolt is connected between the connecting sleeve and the vertical keel.

[0009] Furthermore, an arched pressure plate is installed on the upper end of the first transverse keel, one end of the arched pressure plate is provided with a limiting slot corresponding to the first transverse keel, the other end of the arched pressure plate forms a clamping end, the limiting slot of the arched pressure plate is clamped on the outside of the first transverse keel, and a third connecting bolt for adjusting the distance between the clamping end and the upper end surface of the first transverse keel is provided near the middle of the arched pressure plate, and the third connecting bolt connects the arched pressure plate and the first transverse keel; two arched pressure plates are relatively arranged on the first transverse keel, and the clamping ends of the arched pressure plates clamp the lower end wing plates of the I-beam from both sides.

[0010] Furthermore, an opening is provided on the side of the connecting sleeve for the end of the vertical keel to enter the connecting sleeve from the side of the connecting sleeve.

[0011] Furthermore, a second flange end is provided at the lower end of the vertical keel, and the second flange end includes two separate connecting structures arranged opposite to each other, and the connecting structure includes a U-shaped side wall and a bottom wing plate vertically connected to the U-shaped side wall, and the U-shaped side walls of the two connecting structures clamp the vertical keel from both sides;

[0012] A fourth connecting bolt is connected between the connecting structure and the vertical keel, and a fifth connecting bolt is connected between the connecting structure and the second transverse keel; the fourth connecting bolt passes through the vertical keel and the U-shaped side wall of the connecting structure on both sides of the vertical keel at the same time, and the fifth connecting bolt connects the bottom wing plate and the second transverse keel.

[0013] Furthermore, an upper U-shaped clip is provided at the upper end of the second transverse keel, and a lower U-shaped clip is provided at the lower end of the third transverse keel; the upper U-shaped clip clamps the second transverse keel from above, and the lower U-shaped clip clamps the third transverse keel from below, and a sixth connecting bolt is connected between the upper U-shaped clip and the lower U-shaped clip, and the sixth connecting bolt passes through the upper U-shaped clip, the second transverse keel, the third transverse keel and the lower U-shaped clip in sequence from top to bottom.

[0014] Furthermore, the first transverse keel has an upper end face, a left side face, a right side face and a lower end face; the middle part of the left side face and the middle part of the right side face are respectively provided with a concave shape along the length direction of the first transverse keel; the lower end face of the first transverse keel forms a symmetrical concave folded edge in the middle part, and the concave folded edge is bent upward inside the first transverse keel; the first connecting bolt is connected with a U-shaped fastener, the U-shaped fastener is located in the first transverse keel and fastens the concave folded edge from above, and the first connecting bolt is connected to the first transverse keel through the U-shaped fastener.

[0015] Furthermore, the structures of the first transverse keel, the second transverse keel and the third transverse keel are the same, and a plurality of waist-shaped holes are arranged on the upper end surfaces of the first transverse keel, the second transverse keel and the third transverse keel along their respective length directions.

[0016] Furthermore, the vertical keel is a square tube keel, and two rows of circular holes with staggered heights are respectively provided on the two sides of the vertical keel; two waist-shaped holes with equal heights are respectively provided on the two opposite side walls of the connecting sleeve corresponding to the two rows of circular holes of the vertical keel;

[0017] The U-shaped side walls of the connecting structure on both sides of the vertical keel are respectively provided with two waist-shaped circular holes of equal height corresponding to the two rows of circular holes of the vertical keel;

[0018] The second connecting bolt passes through the waist-shaped hole on the side wall of the connecting sleeve and the circular hole of the vertical keel to connect and fix the upper end of the vertical keel to the connecting sleeve; the fourth connecting bolt passes through the waist-shaped hole on the U-shaped side wall and the circular hole of the vertical keel to connect and fix the lower end of the vertical keel to the second flange end.

[0019] Furthermore, at least two ends of the second transverse keel are fixed to the lower end of the I-beam beam through the vertical keel and the first transverse keel.

[0020] The present invention also provides a suspended ceiling, comprising a keel and a suspended ceiling finish, wherein the suspended ceiling finish is installed under the keel, and the keel is the above-mentioned assembled quick-install keel.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The assembled quick-install keel of the present invention is assembled and connected between the first transverse keel, the vertical keel, the second transverse keel and the third transverse keel, so that the setting of the second transverse keel and the third transverse keel can change the angle relative to the first transverse keel, thereby solving the problem that the setting of the second transverse keel and the third transverse keel is not affected by the extension direction of the I-beam when the top I-beams are no longer parallel, thereby reducing the difficulty of installation.

[0023] 2. The assembled keel in the present invention adopts an assembled connection structure as a whole, which makes assembly more convenient and improves installation efficiency; the assembled connection basically avoids welding and cutting operations in on-site construction, thereby improving on-site safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a plan view of the assembled quick-install keel in the present invention.

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the assembled quick-install keel in the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the first flange end in the present invention.

[0027] Figure 4 It is a schematic diagram of the connection between the first flange end and the first transverse keel of the present invention.

[0028] Figure 5 It is a schematic diagram of the installation of the second flange end in the present invention.

[0029] Figure 6 It is a schematic diagram of the internal structure of the first transverse keel in the present invention.

[0030] Figure 7 It is a schematic diagram of the connection between the arched pressure plate and the I-beam in the present invention.

[0031] Figure 8 It is a schematic diagram of the arched pressure plate structure in the present invention.

[0032] Fig. 9 It is a schematic diagram of the connection between the second transverse keel and the third transverse keel in the present invention.

[0033] Fig.10 It is a schematic diagram of another connection method between the first transverse keel and the I-beam in the present invention.

[0034] In the figure, 1, first transverse keel; 2, second transverse keel; 3, third transverse keel; 4, I-beam; 5, vertical keel; 6, first flange end; 7, second flange end; 8, first connecting bolt; 9, second connecting bolt; 10, third connecting bolt; 11, fourth connecting bolt; 12, fifth connecting bolt; 13, sixth connecting bolt; 14, U-shaped fastener; 15, arched pressure plate; 16, upper U-shaped clamp; 17, lower U-shaped clamp; 18, L-shaped clamp;

[0035] 1-1, upper end surface; 1-2, left side surface; 1-3, right side surface; 1-4, lower end surface; 1-5, inner concave folded edge;

[0036] 6-1, flange end plate; 6-2, connecting sleeve; 6-3, connecting wing plate; 6-4, arc notch;

[0037] 7-1, U-shaped side wall; 7-2, bottom wing plate;

[0038] 15-1, limit slot; 15-2, clamping end;

[0039] 18-1. Insert the terminal. DETAILED DESCRIPTION

[0040] The technical solution of the present invention is further described below in conjunction with specific embodiments:

[0041] An assembled quick-install keel is used for the situation where the I-beams in the top area of ​​the building are not parallel. Of course, it can also be used when the I-beams are parallel, such as Figure 1 and Figure 2 As shown, it includes a first transverse keel 1, a second transverse keel 2 and a third transverse keel 3; the first transverse keel 1 is installed at the lower end of an I-beam 4; a vertical keel 5 is connected between the second transverse keel and the first transverse keel, and the two ends of the vertical keel 5 are respectively connected to the first transverse keel 1 and the second transverse keel 2, and the second transverse keel 2 is installed below the first transverse keel 1 through the vertical keel 5; the third transverse keel 3 is installed perpendicular to the second transverse keel 2 and below the second transverse keel 2; the first transverse keel 1, the second transverse keel 2, the third transverse keel 3 and the vertical keel 5 are assembled and connected; in this embodiment, the first transverse keel 1, the second transverse keel 2 and the third transverse keel 3 are horizontally arranged, and the vertical keel 5 is vertically arranged perpendicular to the horizontal plane.

[0042] A first flange end 6 is provided at the upper end of the first vertical keel. Figure 3 As shown, the first flange end 6 has a flange end plate 6-1 and a connecting sleeve 6-2. The connecting sleeve 6-1 is vertically fixed in the middle of the flange end plate 6-1, and the flange end plate 6-1 forms connecting wing plates 6-3 on both sides of the connecting sleeve 6-2; the upper end of the vertical keel 5 is inserted into the connecting sleeve 6-2 and connected and fixed to the connecting sleeve, and arc grooves 6-4 are respectively arranged on the connecting wing plates 6-3 on both sides of the connecting sleeve 6-2, and the bending directions of the arc grooves 6-4 on the connecting wing plates 6-3 on both sides are arranged relatively.

[0043] Specifically, Figure 4As shown, a first connecting bolt 8 is connected between the first transverse keel 1 and the connecting wing plate 6-3, and the first connecting bolt 8 passes through the arc notch 6-4, and the wing plates 6-3 on both sides of the connecting sleeve are respectively connected to the first transverse keel 1 through the first connecting bolt 6-4; a second connecting bolt 9 is connected between the connecting sleeve 6-2 and the vertical keel 5. When the I-beams are not parallel, the angle of the first flange end 6 is adjusted relative to the first transverse keel 1, so that the first connecting bolt 8 is offset in the arc notch 6-4, so that the second transverse keel 2 below is not affected by the extension direction of the I-beam 4 when connected through the vertical keel 5.

[0044] Preferably, an opening is provided on the side of the connecting sleeve 6-2 for the end of the vertical keel 5 to enter the connecting sleeve 6-2 from the side of the connecting sleeve 6-2.

[0045] The lower end of the vertical keel and the second transverse keel can also be connected by means of a first flange end, or can be connected by an angle code. In this embodiment, a second flange end 7 is provided, such as Figure 5 As shown, the lower end of the vertical keel 5 is assembled and connected to the second transverse keel 2 through the second flange end 7 .

[0046] Specifically, the second flange end includes two separate connecting structures arranged opposite to each other, the connecting structure includes a U-shaped side wall 7-1, and a bottom wing plate 7-2 vertically connected to the U-shaped side wall 7-1, and the U-shaped side walls 7-1 of the two connecting structures clamp the vertical keel 5 from both sides;

[0047] A fourth connecting bolt 11 is connected between the connecting structure and the vertical keel 5, and a fifth connecting bolt 12 is connected between the connecting structure and the second transverse keel 2; the fourth connecting bolt 11 passes through the vertical keel 5 and the U-shaped side wall 7-1 of the connecting structure on both sides of the vertical keel at the same time, and the fifth connecting bolt 12 connects the bottom wing panel 7-2 and the second transverse keel 2.

[0048] The first transverse keel 1 is a hollow structure. Figure 6As shown, it has an upper end face 1-1, a left side face 1-2, a right side face 1-3 and a lower end face 1-4; the middle part of the left side face 1-2 and the middle part of the right side face 1-3 are respectively provided with a concave shape along the length direction of the first transverse keel 1; the lower end face 1-4 of the first transverse keel 1 forms a symmetrical concave folded edge 1-5 in the middle part, and the concave folded edge 1-5 is bent upward inside the first transverse keel 1; the first connecting bolt 8 is connected with a U-shaped fastener 14, specifically, the first connecting bolt 8 passes through the U-shaped fastener and is connected by a nut, the U-shaped fastener 14 is located in the first transverse keel 1 and fastens the concave folded edge 1-5 from above, and the first connecting bolt 8 is connected to the first transverse keel 1 through the U-shaped fastener 14. Two first connecting bolts 8 are provided for the connecting wing plates of each first flange end 6, and the corresponding U-shaped fasteners 14 can be one or two. When there is one U-shaped fastener 14, the length is increased so that the two first connecting bolts 8 are connected to the same U-shaped fastener 14 at the same time; when there are two U-shaped fasteners 14, each first connecting bolt 8 is connected to one U-shaped fastener 14 respectively.

[0049] In one embodiment, the first transverse keel 1, the second transverse keel 2 and the third transverse keel 3 have the same structure, and the specifications may be different or the same. A plurality of waist-shaped holes are provided on the upper end surfaces of the first transverse keel 1, the second transverse keel 2 and the third transverse keel 3 along their respective length directions. Specifically, the third connecting screw 10 passes through the waist-shaped hole on the first transverse keel, the fifth connecting screw 12 passes through the waist-shaped hole on the second transverse keel, and the sixth connecting screw 13 passes through the waist-shaped holes on the second transverse keel and the third transverse keel.

[0050] When the first transverse keel 1 is connected to the I-beam 4, Figure 7 and Figure 8 As shown, an arched pressure plate 15 is installed at the upper end of the first transverse keel 1, and one end of the arched pressure plate 15 is provided with a limiting slot 15-1 corresponding to the first transverse keel 1, and the other end of the arched pressure plate 15 forms a clamping end 15-2. The limiting slot 15-1 of the arched pressure plate 15 is clamped on the outer side of the first transverse keel 1, specifically clamping the first transverse keel 1 from the upper end face, left side face and right side face of the first transverse keel 1, and a third connecting bolt 10 for adjusting the distance between the clamping end 15-2 and the upper end face of the first transverse keel 1 is provided near the middle of the arched pressure plate 15, and the third connecting bolt 10 connects the arched pressure plate 15 and the first transverse keel 1; two arched pressure plates 15 are arranged opposite to each other on the first transverse keel 1, and the clamping ends 15-2 of the arched pressure plates 15 clamp the lower end wing plates of the I-beam 4 from both sides.

[0051] The present invention also provides a connection method between the first transverse keel 1 and the I-beam beam 4, such as Fig.10 As shown, the first transverse keel 1 is clamped on the lower end wing plates on both sides of the I-beam 4 by L-shaped clamping plates 18. Figure 6As shown, an insertion end 18-1 is set at the position of the inner concave folded edge at one end of the L-shaped clamping plate 18, and the width of the insertion end 18-1 is smaller than the width of the L-shaped clamping plate 18 to form a convex structure. When in use, the insertion end 18-1 is inserted between the inner concave folded edges 1-5 on both sides of the first transverse keel to prevent the direction of the L-shaped clamping plate 18 from shifting. The L-shaped clamping plate 18 is connected to the first transverse keel 1 by bolts, and the other end of the L-shaped clamping plate 18 is clamped at the lower end wing plate of the I-beam 4.

[0052] When the second transverse keel 2 is connected to the third transverse keel 3, Fig. 9 As shown, an upper U-shaped clamp 16 is provided at the upper end of the second transverse keel 2, and a lower U-shaped clamp 17 is provided at the lower end of the third transverse keel 3; the upper U-shaped clamp 16 clamps the second transverse keel 2 from the top, and the lower U-shaped clamp 17 clamps the third transverse keel 3 from the bottom, and a sixth connecting bolt 13 is connected between the upper U-shaped clamp 16 and the lower U-shaped clamp 17, and the sixth connecting bolt 13 passes through the upper U-shaped clamp 16, the second transverse keel 2, the third transverse keel 3 and the lower U-shaped clamp 17 from top to bottom.

[0053] The vertical keel is a square tube keel, such as a square steel tube, and two rows of circular holes with staggered heights are respectively provided on the two sides of the vertical keel 5; the two opposite side walls of the connecting sleeve 6 are respectively provided with two waist-shaped holes with equal heights corresponding to the two rows of circular holes of the vertical keel;

[0054] The U-shaped side walls 7-1 of the connection structure on both sides of the vertical keel 5 are respectively provided with two waist-shaped holes of equal height corresponding to the two rows of circular holes of the vertical keel 5;

[0055] The second connecting bolt 9 passes through the waist-shaped hole of the side wall of the connecting sleeve 6-2 and the circular hole of the vertical keel 5 to connect and fix the upper end of the vertical keel 5 to the connecting sleeve 6-2; the fourth connecting bolt 11 passes through the waist-shaped hole of the U-shaped side wall 7-1 and the circular hole of the vertical keel 5 to connect and fix the lower end of the vertical keel 5 to the second flange end 7. The arrangement of the high and low staggered circular holes on the side wall of the vertical keel 5 increases the lateral stability of the vertical keel, and the waist-shaped holes facilitate the height adjustment.

[0056] At least two ends of the second transverse keel 2 are fixed to the lower end of the I-beam 4 through the vertical keels 5 and the first transverse keel 1 .

[0057] This embodiment also provides a suspended ceiling, in which the suspended ceiling surface is installed under the I-beam through the above-mentioned assembled quick-install keel, and specifically, the suspended ceiling surface is installed under the second transverse keel and the third transverse keel through threaded screws, steel wires, etc.

[0058] In this embodiment, all structural names involving expressions such as first, second, third, fourth, fifth, sixth, upper, and lower are only used to distinguish the structures and have no other limitations on the structures; in addition, the first connecting bolt to the sixth connecting bolt involved in this application are all equipped with nuts and gasket structures.

[0059] This embodiment is only a further explanation of the present invention, not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it will be protected by the patent law.

Claims

1. An assembled quick-install keel, characterized in that: The first transverse keel is installed at the lower end of the I-beam; a vertical keel is connected between the second transverse keel and the first transverse keel, and the two ends of the vertical keel are respectively connected to the first transverse keel and the second transverse keel, and the second transverse keel is installed below the first transverse keel through the vertical keel; the third transverse keel is installed perpendicular to the second transverse keel and below the second transverse keel; the first transverse keel, the second transverse keel, the third transverse keel and the vertical keel are assembled and connected; The upper end of the vertical keel is provided with a first flange end, and the first flange end has a flange end plate and a connecting sleeve. The connecting sleeve is vertically fixed to the middle part of the flange end plate, and the flange end plate forms connecting wing plates on both sides of the connecting sleeve; the upper end of the vertical keel is inserted into the connecting sleeve and connected and fixed to the connecting sleeve, and arc notches are respectively provided on the connecting wing plates on both sides of the connecting sleeve, and the bending directions of the arc notches on the connecting wing plates on both sides are arranged relative to each other; A first connecting bolt is connected between the first transverse keel and the connecting wing plate. The first connecting bolt passes through the arc slot and connects the connecting wing plates on both sides of the connecting sleeve to the first transverse keel respectively through the first connecting bolt; a second connecting bolt is connected between the connecting sleeve and the vertical keel.

2. The assembled quick-install keel according to claim 1, characterized in that: An arched pressure plate is installed at the upper end of the first transverse keel, and one end of the arched pressure plate is provided with a limiting slot corresponding to the first transverse keel, and the other end of the arched pressure plate forms a clamping end. The limiting slot of the arched pressure plate is clamped on the outside of the first transverse keel, and a third connecting bolt for adjusting the distance between the clamping end and the upper end surface of the first transverse keel is provided near the middle of the arched pressure plate, and the third connecting bolt connects the arched clamping plate and the first transverse keel; two arched pressure plates are relatively arranged on the first transverse keel, and the clamping ends of the arched pressure plates clamp the lower end wing plates of the I-beam from both sides.

3. The assembled quick-install keel according to claim 1, characterized in that: The side surface of the connecting sleeve is provided with an opening for the end of the vertical keel to enter the connecting sleeve from the side surface of the connecting sleeve.

4. The assembled quick-install keel according to claim 1, characterized in that: The lower end of the vertical keel is provided with a second flange end, and the second flange end includes two separate connecting structures arranged opposite to each other, and the connecting structure includes a U-shaped side wall and a bottom wing plate perpendicularly connected to the U-shaped side wall. The U-shaped side walls of the two connecting structures clamp the vertical keel from both sides; A fourth connecting bolt is connected between the connecting structure and the vertical keel, and a fifth connecting bolt is connected between the connecting structure and the second transverse keel; the fourth connecting bolt passes through the vertical keel and the U-shaped side walls of the connecting structure on both sides of the vertical keel at the same time, and the fifth connecting bolt connects the bottom wing plate and the second transverse keel.

5. The assembled quick-install keel according to claim 1, characterized in that: An upper U-shaped clip is provided at the upper end of the second transverse keel, and a lower U-shaped clip is provided at the lower end of the third transverse keel; the upper U-shaped clip clamps the second transverse keel from above, and the lower U-shaped clip clamps the third transverse keel from below, and a sixth connecting bolt is connected between the upper U-shaped clip and the lower U-shaped clip, and the sixth connecting bolt passes through the upper U-shaped clip, the second transverse keel, the third transverse keel and the lower U-shaped clip in sequence from top to bottom.

6. The assembled quick-install keel according to claim 1, characterized in that: The first transverse keel has an upper end face, a left side face, a right side face and a lower end face; the middle part of the left side face and the middle part of the right side face are respectively provided with a concave shape along the length direction of the first transverse keel; the lower end face of the first transverse keel forms a symmetrical concave folded edge in the middle part, and the concave folded edge is bent upward inside the first transverse keel; the first connecting bolt is connected with a U-shaped fastener, and the U-shaped fastener is located in the first transverse keel and fastens the concave folded edge from above, and the first connecting bolt is connected to the first transverse keel through the U-shaped fastener.

7. The assembled quick-install keel according to claim 6, characterized in that: The first transverse keel, the second transverse keel and the third transverse keel have the same structure, and a plurality of waist-shaped holes are provided on the upper end surfaces of the first transverse keel, the second transverse keel and the third transverse keel along their respective length directions.

8. The assembled quick-install keel according to claim 4, characterized in that: The vertical keel is a square tube keel, and two rows of circular holes with staggered heights are provided on both sides of the vertical keel; the two opposite side walls of the connecting sleeve are respectively provided with two waist-shaped circular holes with equal heights corresponding to the two rows of circular holes of the vertical keel; The U-shaped side walls of the connecting structure on both sides of the vertical keel are respectively provided with two waist-shaped circular holes of equal height corresponding to the two rows of circular holes of the vertical keel; The second connecting bolt passes through the waist-shaped hole on the side wall of the connecting sleeve and the circular hole on the vertical keel to connect and fix the upper end of the vertical keel to the connecting sleeve; the fourth connecting bolt passes through the waist-shaped hole on the U-shaped side wall and the circular hole on the vertical keel to connect and fix the lower end of the vertical keel to the second flange end.

9. The assembled quick-install keel according to claim 1, characterized in that: At least two ends of the second transverse keel are fixed to the lower end of the I-beam through vertical keels and the first transverse keel.

10. A suspended ceiling, characterized in that: It comprises a keel and a ceiling finish, wherein the ceiling finish is installed below the keel, and the keel is the assembled quick-install keel according to any one of claims 1 to 9.

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