Fabricated steel structure for building

Abstract

The invention discloses a steel structure for a fabricated building, and relates to the field of steel structures, the steel structure comprises an H-shaped roof beam and C-shaped purlines which are distributed in a crossed manner, the butt joint part of the C-shaped purlines is located on the upper surface of the H-shaped roof beam, plate seats are symmetrically arranged on the two sides of the H-shaped roof beam, each plate seat comprises a bent plate, the bent plates are flatly attached to the H-shaped roof beam, and the top of each bent plate is provided with a C-shaped clamping part; the C-shaped clamping part is clamped at the edge of a flange plate at the upper part of the H-shaped roof beam, the C-shaped clamping part is fixed with the H-shaped roof beam through a bolt, and an upper folding lug is arranged at the top of the C-shaped clamping part. The inner supporting piece, the C-shaped purline and the plate seat are locked in one step by adopting the screws, so that the C-shaped purline and the H-shaped roof beam are fixedly connected, and the angle brace is fixedly connected with the plate seat and the C-shaped purline by adopting the screws; the assembling operation is convenient and fast, welding is not needed, an assembling hole does not need to be excessively formed in the H-shaped roof beam, the high assembling strength is kept, and the assembling efficiency of the C-shaped purline is improved.

Description

Technical Field

[0001] The present invention relates to the field of steel structures, and particularly to a steel structure for prefabricated buildings. Background Art

[0002] The steel structure ceiling framework of a prefabricated building is composed of roof beams and purlins. The roof beams are H-shaped steel with a horizontal arrangement, and the purlins are C-shaped steel with a longitudinal arrangement. The purlins are erected on the surface of the roof beams, and the butt joint parts of the purlins face the roof beams. The purlins are fixed by purlin seats, and then knee braces are added on both sides. In necessary situations, connecting plates also need to be fixed at the butt joint parts of the purlins.

[0003] The connection between the above purlins and roof beams requires welding or bolting purlin seats on the surface of the roof beams, and then using bolts to fix the purlins to the purlin seats. The knee braces are also connected to the roof beams and purlins by welding or bolting. Since the number of purlins and knee braces is large, if the purlins, purlin seats, and knee braces are fixed by welding, the construction time is relatively long, and there are great safety hazards in high-altitude operations. If bolts are used to fix the purlins, purlin seats, and knee braces, there are many holes on the surface of the roof beams, which not only reduces the structural stability of the roof beams but also has the problem of low construction efficiency. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the purpose of the present invention is to provide a steel structure for prefabricated buildings, which is used to solve the problems of high difficulty in high-altitude work and low construction efficiency caused by connecting traditional purlins and roof beams and installing knee braces by welding or installing bolts through holes.

[0005] In order to solve the problems of the prior art, the technical solution of the present invention is as follows: A steel structure for prefabricated buildings includes: H-shaped roof beams and C-shaped purlins distributed in a cross-shaped and staggered manner. The butt joint parts of the C-shaped purlins are located on the upper surface of the H-shaped roof beams. Plate seats are symmetrically arranged on both sides of the H-shaped roof beams. The plate seats include bent plates, and the bent plates are flat against the H-shaped roof beams. The top of the bent plates has C-shaped clamping parts, and the C-shaped clamping parts are clamped on the edges of the upper flange plates of the H-shaped roof beams. The C-shaped clamping parts are fixed to the H-shaped roof beams by bolts. The top of the C-shaped clamping parts has upper folding ears, and the upper folding ears are flat against the webs of the C-shaped purlins. An inner support member is inserted into the C-shaped purlins from the opening side to the inside, and bolts penetrate through the inner support member, the C-shaped purlins, and the upper folding ears for fixation. The lower part of the bent plates has lower folding ears, and the lower folding ears are connected to the C-shaped purlins by inclined and extended knee braces.

[0006] Preferably, the inner support member includes an arched plate body and two parallel distributed struts. Two groups of rotating arms are symmetrically and rotatably installed at both ends of the arched plate body. Each group of rotating arms is distributed in a V shape, and the rotating arms are respectively rotatably connected to the two struts. Bolts penetrate through and lock the arched plate body, the C-shaped purlins, and the upper folding ears, so that the arched plate body pushes and expands the two struts to move through the rotating arms, and the struts abut against the top and bottom inside the C-shaped purlins.

[0007] Preferably, both ends of the arched plate are bent to form concave portions, which abut against the inner side of the web of the C-shaped purlin, so that a gap exists between the middle of the arched plate and the web of the C-shaped purlin.

[0008] Preferably, a shaft column is slidably arranged to penetrate the concave portion, and two ends of the shaft column are connected to nuts through threads so that the shaft column is fixedly connected to the concave portion, and the rotating arm is rotatably connected to the end of the shaft column.

[0009] Preferably, the bent plate is C-shaped, and is flat against the web and upper and lower flange plates of the H-shaped roof beam. The bottom of the bent plate has a hook portion, and the hook portion hooks the edge of the lower flange plate of the H-shaped roof beam.

[0010] Preferably, the end of the C-shaped clamping portion is bent inwardly to form a second elastic portion, and the second elastic portion elastically contacts the flange plate at the upper portion of the H-shaped roof beam.

[0011] Preferably, the end of the upper folding ear is bent downward to form a first elastic portion, and the first elastic portion elastically contacts the web of the C-shaped purlin.

[0012] Preferably, the two ends of the corner brace are respectively connected to the lower folding ear and the C-shaped purlin by bolts, and the holes for the bolts to penetrate the corner brace and the C-shaped purlin are waist-shaped holes.

[0013] Preferably, a pressure plate is provided on the inner side of the C-shaped purlin for the corner brace, and the upper and lower ends of the pressure plate are inclined to abut against the two struts. Bolts penetrate and lock the pressure plate, the C-shaped purlin and the corner brace, so that the pressure plate presses the two struts.

[0014] Compared with the prior art, the advantages of the present invention are as follows: 1. The plate seat and the H-shaped roof beam of the present invention are fixed by bolts to form an installation foundation, and the inner support, C-shaped purlin and plate seat are locked in one step by screws, so that the C-shaped purlin and the H-shaped roof beam are fixedly connected, and the corner support is fixedly connected to the plate seat and the C-shaped purlin by screws to form a reinforced connection of the C-shaped purlin. The assembly operation is convenient, no welding is required, and no excessive assembly holes are required on the H-shaped roof beam, so that the assembly strength is maintained at a high level, and the assembly efficiency of the C-shaped purlin is improved.

[0015] 2. When the bolts are tightened, the present invention pushes the arched plate body toward the web of the C-shaped purlin, so that the support rod automatically expands to support the inside of the C-shaped purlin. The operation is convenient and the strength of the H-shaped roof beam joint can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is one of the overall structural schematic diagrams of the present invention.

[0017] Figure 2 This is the second schematic diagram of the overall structure of the present invention.

[0018] Figure 3 Schematic diagram of the component distribution structure of the present invention.

[0019] Figure 4 Schematic diagram of the plate seat structure of the present invention.

[0020] Figure 5 Schematic diagram of the inner support member structure of the present invention.

[0021] Figure 6 Schematic diagram of the first elastic part and the second elastic part structure of the present invention.

[0022] Figure 7 Schematic diagram of the press plate alignment purlin structure of the present invention.

[0023] Reference numerals: 1, H-shaped roof beam; 2, C-shaped purlin; 3, plate seat; 31, bent plate; 32, C-shaped clamping part; 33, lower folding ear; 34, upper folding ear; 35, first elastic part; 36, second elastic part; 37, bending hook part; 4, inner support member; 41, arcuate plate body; 42, concave part; 43, shaft column; 44, strut; 45, rotating arm; 5, purlin; 6, press plate. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0025] The steel structure for prefabricated buildings optimizes the assembly of the steel structure ceiling purlins, such as Figure 1 , Figure 2 As shown, the device includes an H-shaped roof beam 1 and a C-shaped purlin 2. The H-shaped roof beam 1 is arranged horizontally, and the C-shaped purlin 2 is arranged longitudinally and erected on the top of the H-shaped roof beam 1. The butt joint part of the C-shaped purlin 2 faces the upper surface of the H-shaped roof beam 1.

[0026] As Figure 3 , Figure 4 As shown, two plate seats 3 are symmetrically arranged on both sides of the H-shaped roof beam 1. The plate seat 3 includes a bent plate 31. The main body of the bent plate 31 is C-shaped, so that the bent plate 31 can be flatly attached to the web, upper flange plate and lower flange plate of the H-shaped roof beam 1. A C-shaped clamping part 32 is bent at the top of the bent plate 31. The C-shaped clamping part 32 is used to clamp the edge of the upper flange plate of the H-shaped roof beam 1. A vertical upper folding ear 34 is bent upward at the top side of the C-shaped clamping part 32, and a vertical lower folding ear 33 is bent upward at the lower side of the bent plate 31.

[0027] As Figure 2As shown, an inner support member 4 is provided inside the two docked C-shaped purlins 2 to increase the connection strength. Since the open-side edge of the C-shaped purlin 2 has a curled edge, the opening size of the C-shaped purlin 2 is smaller than the inner cavity size, which is not convenient for inserting the strengthening component. Therefore, an expandable inner support member 4 is used to conveniently insert into the inside of the C-shaped purlin 2 from the opening for expansion support. As Figure 5 shown, the inner support member 4 includes an arcuate plate body 41 and two parallel distributed struts 44. The middle of the arcuate plate body 41 has two holes for bolts to pass through. The two ends of the arcuate plate body 41 are bent to form concave portions 42. An axle column 43 is slidably penetrated through the concave portions 42. Both ends of the axle column 43 are threadedly connected with nuts to fixedly connect the axle column 43 with the concave portions 42. Two turn arms 45 distributed in a figure-eight shape are rotatably installed at the ends of the axle column 43, and the turn arms 45 are rotatably connected with the struts 44.

[0028] The specific installation steps of the C-shaped purlin 2 are as follows: The bent plate 31 is arranged flat against the H-shaped roof beam 1. The C-shaped clamping portion 32 is pre-drilled with nail holes. The C-shaped clamping portion 32 is adaptively clamped on the edge of the upper flange plate of the H-shaped roof beam 1. Bolts are vertically penetrated through the C-shaped clamping portion 32 and the upper flange plate of the H-shaped roof beam 1 to fixedly connect the C-shaped clamping portion 32 with the H-shaped roof beam 1. The vertical web surfaces of the two docked C-shaped purlins 2 are flat against the two symmetrically distributed upper folding ears 34. The two struts 44 in the initial state are in a retracted state, which is convenient for the whole inner support member 4 to be sent into the inside from the open side of the C-shaped purlin 2. Then, bolts are penetrated through the arcuate plate body 41, the C-shaped purlin 2 and the upper folding ear 34, and the fastening screws are used to make the arcuate plate body 41 approach the web of the C-shaped purlin 2. The two struts 44 are pushed and expanded by the turn arms 45. The struts 44 abut against the top and bottom inside the C-shaped purlin 2, so that the docking part of the C-shaped purlin 2 forms a transition reinforcement. The inner support member 4, the C-shaped purlin 2 and the plate seat 3 are fixed integrally by screws.

[0029] When tightening the bolts, the concave portion 42 abuts against the inner side of the web of the C-shaped purlin 2, so that there is a gap between the middle of the arcuate plate body 41 and the web of the C-shaped purlin 2, which enables the arcuate plate body 41 to have a space for elastic deformation, facilitating the full tightening of the bolts and avoiding extrusion damage to the C-shaped purlin 2.

[0030] As Figure 6 shown, the end of the C-shaped clamping portion 32 is bent inward to form a second elastic portion 36, and the second elastic portion 36 elastically abuts against the upper flange plate of the H-shaped roof beam 1. The end of the upper folding ear 34 is bent downward to form a first elastic portion 35, and the first elastic portion 35 elastically abuts against the web of the C-shaped purlin 2. Through the first elastic portion 35 and the second elastic portion 36, the connection between the C-shaped purlin 2 and the H-shaped roof beam 1 has a certain seismic effect, avoiding loosening of the connection point due to vibration.

[0031] Two knee braces 5 are arranged on both sides of the H-shaped roof beam 1. The knee braces 5 are inclinedly distributed. The inclined bottom end of the knee brace 5 is fixedly connected to the lower folding ear 33 by bolts, and the inclined top end of the knee brace 5 is fixedly connected to the C-shaped purlin 2 by bolts, so that the knee brace 5 forms a triangular support for the C-shaped purlin 2, improving the connection stability between the C-shaped purlin 2 and the H-shaped roof beam 1.

[0032] As Figure 7 shown, the connection part of the knee brace 5 and the C-shaped purlin 2 is close to the end of the strut 44. A pressing plate 6 is arranged on the inner side of the C-shaped purlin 2. The upper and lower ends of the pressing plate 6 are inclinedly abutted against the two struts 44. Bolts penetrate through the pressing plate 6, the C-shaped purlin 2, and the knee brace 5 and are locked. While fixing the knee brace 5 and the C-shaped purlin 2, the pressing plate 6 presses the end positions of the two struts 44, so that the two struts 44 are shaped to support the inner side of the C-shaped purlin 2.

[0033] The bottom of the bending plate 31 has a bending hook part 37. The bending hook part 37 hooks the edge of the lower flange plate of the H-shaped roof beam 1, so that the bottom of the bending plate 31 can be stably combined with the H-shaped roof beam 1, improving the stable supporting effect on the knee brace 5.

[0034] The holes for the counterpoint through bolts of the knee brace 5 and the C-shaped purlin 2 are all waist-shaped holes, which is convenient for adaptively adjusting the installation counterpoint of the knee brace 5 and the C-shaped purlin 2 and reducing the counterpoint difficulty.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention.

Claims

1. A steel structure for prefabricated buildings, comprising: The cross - crisscross distributed H - shaped roof beams (1) and C - shaped purlins (2), the butt joint part of the C - shaped purlins (2) is located on the upper surface of the H - shaped roof beam (1). It is characterized in that seat plates (3) are symmetrically arranged on both sides of the H - shaped roof beam (1). The seat plate (3) includes a bent plate (31). The bent plate (31) is flat against the H - shaped roof beam (1). The top of the bent plate (31) has a C - shaped clamping part (32). The C - shaped clamping part (32) is clamped on the edge of the upper flange plate of the H - shaped roof beam (1). The C - shaped clamping part (32) is fixed to the H - shaped roof beam (1) by bolts. The top of the C - shaped clamping part (32) has an upper folding ear (34). The upper folding ear (34) is flat against the web of the C - shaped purlin (2). An inner bracing member (4) is inserted into the C - shaped purlin (2) from its opening side. Bolts penetrate through the inner bracing member (4), the C - shaped purlin (2) and the upper folding ear (34) for fixation. The lower part of the bent plate (31) has a lower folding ear (33). The lower folding ear (33) is connected to the C - shaped purlin (2) by an inclined extension knee brace (5).

2. The steel structure for prefabricated buildings according to claim 1, wherein, The inner bracing member (4) includes an arched plate body (41) and two parallel distributed struts (44). At both ends of the arched plate body (41), two groups of rotating arms (45) are symmetrically and rotatably installed. Each group of rotating arms (45) is distributed in a V - shape. The rotating arms (45) are respectively rotatably connected to the two struts (44). Bolts penetrate through and lock the arched plate body (41), the C - shaped purlin (2), and the upper folding ear (34), so that the arched plate body (41) pushes and presses the two struts (44) to expand and move through the rotating arms (45). The struts (44) abut against the top and bottom inside the C - shaped purlin (2).

3. The steel structure for prefabricated buildings according to claim 2, characterized in that, Both ends of the arched plate body (41) are bent to form concave parts (42). The concave parts (42) abut against the inner side of the web of the C - shaped purlin (2), so that there is a gap between the middle part of the arched plate body (41) and the web of the C - shaped purlin (2).

4. The steel structure for prefabricated buildings according to claim 3, characterized in that A shaft column (43) is slidably penetrated through the concave part (42). Both ends of the shaft column (43) are thread - connected with nuts, so that the shaft column (43) is fixedly connected to the concave part (42). The rotating arm (45) is rotatably connected to the end of the shaft column (43).

5. The steel structure for prefabricated buildings according to claim 1, characterized in that, The bent plate (31) is C - shaped. The bent plate (31) is flat against the web, upper and lower flange plates of the H - shaped roof beam (1). The bottom of the bent plate (31) has a hook part (37). The hook part (37) hooks the edge of the lower flange plate of the H - shaped roof beam (1).

6. The steel structure for prefabricated buildings according to claim 1, wherein, The end of the C - shaped clamping part (32) is bent inward to form a second elastic part (36). The second elastic part (36) elastically abuts against the upper flange plate of the H - shaped roof beam (1).

7. The steel structure for prefabricated buildings according to claim 1, characterized in that, The end of the upper folding ear (34) is bent downward to form a first elastic part (35). The first elastic part (35) elastically abuts against the web of the C - shaped purlin (2).

8. The steel structure for prefabricated buildings according to claim 2, wherein Both ends of the knee brace (5) are respectively connected to the lower folding ear (33) and the C - shaped purlin (2) by bolts. The holes for the knee brace (5) and the C - shaped purlin (2) to penetrate the bolts are all waist - shaped holes.

9. The steel structure for prefabricated buildings according to claim 8, characterized in that, A pressing plate (6) is arranged on the inner side of the C-shaped purlin (2) opposite to the corner brace (5). The upper and lower ends of the pressing plate (6) are inclined and abutted against the two struts (44). Bolts penetrate through and lock the pressing plate (6), the C-shaped purlin (2) and the corner brace (5) so that the pressing plate (6) presses the two struts (44).

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