Large-span prestressed string truss structure

Abstract

The utility model relates to the technical field of string net racks, in particular to a large-span prestress string net rack structure which comprises a plurality of primary trusses, a plurality of secondary trusses are arranged between every two adjacent primary trusses, and a plurality of fixing mechanisms connected with the secondary trusses at the corresponding positions in an inserted mode are fixed to the positions, corresponding to the secondary trusses, of the outer sides of the primary trusses. The fixing mechanism comprises a fixing frame fixed to the main truss, and first rectangular sleeves are fixedly connected to the four side faces of the fixing frame. According to the secondary truss fixing device, the secondary truss can be fixed through mutual approaching of the two second rectangular sleeves at the opposite positions, the secondary truss can be conveniently replaced in the later period, bolts do not need to be used for fixing, and therefore the installation time can be shortened, and the installation efficiency of the device is improved; and the secondary trusses with the same length can be installed between the two adjacent primary trusses, and the device is simple in installation process and higher in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of string-tensioned grid frames, in particular to a large-span prestressed string-tensioned grid frame structure. Background Art

[0002] The string-grid structure is a structural system that combines the characteristics of the beam string and grid structure. This structure is usually composed of a rigid member (such as a beam or truss) on the upper chord and a high-strength tensioned cable / rod, and is connected by a number of struts to form a rigid-flexible hybrid structural system. The long-span prestressed string-grid structure is an advanced spatial structure that combines the advantages of the beam string and grid structure and is suitable for construction projects that require large span coverage.

[0003] At present, the tensioned grid is usually composed of multiple main trusses and secondary trusses. Since the main trusses and the secondary trusses are usually fixed with bolts, it takes a lot of time to install them. In addition, if the entire grid is squeezed by external force in the later stage, one or more of the secondary trusses may be deformed. At this time, the deformed secondary trusses need to be removed. Since the grid frame is squeezed by external force, multiple secondary trusses will be stuck between two adjacent main trusses. Therefore, even if the bolts of the deformed secondary trusses are removed, it is still difficult to remove the deformed secondary trusses from between two adjacent main trusses. Utility Model Content

[0004] The utility model aims to provide a large-span prestressed string grid structure to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large-span prestressed tensioned truss structure comprises a plurality of main trusses, a plurality of secondary trusses are arranged between two adjacent main trusses, a plurality of fixing mechanisms which are plugged into the secondary trusses at corresponding positions are fixed on the outer sides of the main trusses, the fixing mechanisms comprise a fixing frame which is fixed to the main trusses, a rectangular sleeve 1 is fixedly connected to the four side surfaces of the fixing frame, a mounting assembly is arranged inside the rectangular sleeve 1, a clamping assembly is arranged outside the rectangular sleeve 1, and the mounting assembly comprises a rectangular sleeve 2 which slides inside the rectangular sleeve 1 at corresponding positions.

[0007] Furthermore, two opposing side surfaces of the rectangular sleeve 1 are penetrated with sliding grooves, and two opposing side surfaces of the rectangular sleeve 2 are fixedly connected at the corresponding sliding grooves with connecting blocks that slide with the sliding grooves at corresponding positions, and both ends of the four side surfaces of the fixed frame are rotatably connected with screws 1 that penetrate and screw with the connecting blocks at corresponding positions.

[0008] Furthermore, four corners of one side of the fixing frame are penetrated with L-shaped holes, one end of the screw rod penetrates the L-shaped holes at the corresponding positions and is fixedly connected with a sprocket, and a chain rolls between two sprockets at opposite positions.

[0009] Furthermore, two opposite side surfaces of the rectangular sleeve 1 and away from the fixing frame are fixedly connected with fixing blocks which penetrate and rotate with a screw rod 1 at a corresponding position, and a nut 1 is fixedly connected to one end of the screw rod 1 away from the fixing frame.

[0010] Furthermore, support blocks are fixedly connected to both sides of one side of the rectangular sleeve two, plug holes are penetrated on the two opposite side faces of the rectangular sleeve two, the snap-on assembly includes two symmetrically arranged L-shaped plug blocks plugged into the two plug holes, a connecting plate is fixedly connected to one end of the top surface of the L-shaped plug block, a round rod is rotatably penetrated between the two support blocks at relative positions, and both ends of the round rod are fixedly connected to screw rod two that penetrate and screw with the connecting plate at the corresponding position.

[0011] Furthermore, one end of the second screw rod is fixedly connected with a second nut, the side surface of the first rectangular sleeve which is away from each other is fixedly connected with a sliding rod which slides through the L-shaped plug block at the corresponding position, and one end of the sliding rod is fixedly connected with a limiting block.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The device can fix the secondary truss by bringing two rectangular sleeves at relative positions close to each other, and is convenient for replacing the secondary truss later, without the need for bolt fixation, thereby reducing installation time and improving the installation efficiency of the device. The secondary truss of similar length can be installed between two adjacent main trusses, and the device has a simple installation process and higher practicality;

[0014] 2. By rotating the two screw rods at opposite positions at the same time, the two L-shaped plugs at corresponding positions can be moved closer to each other until the opposite ends of the two L-shaped plugs are inserted into the rectangular holes at corresponding positions, so that the secondary truss can be installed more stably, thereby preventing the secondary truss from falling due to the rotation of the rectangular sleeves at both ends of the secondary truss under external force factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the secondary truss in the utility model;

[0017] Figure 3 It is a schematic diagram of the fixing mechanism structure in the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the fixing frame in the utility model;

[0019] Figure 5 It is a schematic diagram of the installation component structure in the utility model;

[0020] Figure 6 It is a schematic diagram of the structure of the plug-in assembly in the utility model.

[0021] In the figure: 1. main truss; 2. secondary truss; 21. rectangular hole; 3. fixing mechanism; 31. fixing frame; 311. rectangular sleeve 1; 312. slide groove; 313. L-shaped hole; 314. fixing block; 315. support block; 32. installation assembly; 321. rectangular sleeve 2; 322. connecting block; 323. screw 1; 324. sprocket; 325. nut 1; 326. plug-in hole; 33. snap-on assembly; 331. L-shaped plug-in block; 332. connecting plate; 333. round rod; 334. screw 2; 335. nut 2; 336. slide rod; 337. limit block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 6 In an embodiment of the utility model, a large-span prestressed tensioned truss structure includes a plurality of main trusses 1, a plurality of secondary trusses 2 are arranged between two adjacent main trusses 1, a plurality of fixing mechanisms 3 are fixed at the outer sides of the main trusses 1 corresponding to the secondary trusses 2 and plugged into the secondary trusses 2 at corresponding positions, the fixing mechanisms 3 include a fixing frame 31 fixed to the main trusses 1, a rectangular sleeve 1 311 is fixedly connected to the four sides of the fixing frame 31, an installation component 32 is arranged inside the rectangular sleeve 1 311, a clamping component 33 is arranged outside the rectangular sleeve 1 311, and the installation component 32 includes a rectangular sleeve 2 321 sliding inside the rectangular sleeve 1 311 at the corresponding position.

[0024] Specifically, firstly, a plurality of main trusses 1 are fixed on a plurality of tension beams according to the construction requirements, and then rectangular holes 21 are penetrated at both ends of one side of the truss 2, and then one end of the secondary truss 2 is inserted into one of the rectangular sleeves 321, and then the rectangular sleeve 321 is moved to align the rectangular hole 21 on the secondary truss 2 with the clamping assembly 33 at the corresponding position, and one end of the secondary truss 2 is clamped and fixed by the clamping assembly 33, and then the other end of the secondary truss 2 is aligned with the rectangular sleeve 321 at the corresponding position, and another rectangular sleeve 321 is moved to insert the other end of the secondary truss 2 into the rectangular sleeve 321 at the corresponding position, and the other end of the secondary truss 2 is clamped and fixed by the clamping assembly 33, and then the rectangular sleeves 321 at both ends of the secondary truss 2 are moved again, so that the two rectangular sleeves 321 squeeze and fix the secondary truss 2. When the main truss 1 is subjected to excessive When external force (such as strong wind) is applied, pressure will be applied to the secondary truss 2, which may cause the secondary truss 2 to bend and deform. In order to prevent greater accidents from occurring, the deformed secondary truss 2 needs to be replaced. First, the clamping components 33 at both ends of the deformed secondary truss 2 are separated from the secondary truss 2. Then, the rectangular sleeves 321 at both ends of the secondary truss 2 are moved away from each other so that the rectangular sleeves 321 no longer apply external force to the secondary truss 2. At this time, the deformed secondary truss 2 can be taken out from between the two rectangular sleeves 321. The device can fix the secondary truss 2 by bringing the two rectangular sleeves 321 at relative positions close to each other, and facilitates the replacement of the secondary truss 2 at a later time. Bolts are not required, so the installation time can be reduced, the installation efficiency of the device can be improved, and the secondary truss 2 with similar lengths can be installed between two adjacent main trusses 1. The installation process of the device is simple and the practicality is higher.

[0025] Embodiment 1

[0026] like Figure 3-5 As shown, in the present embodiment, the two opposite sides of the rectangular sleeve 1 311 are penetrated with a slide groove 312, and the two opposite sides of the rectangular sleeve 2 321 are fixedly connected with a connecting block 322 that slides with the slide groove 312 at the corresponding position at the corresponding position, and the two ends of the four sides of the fixed frame 31 are rotatably connected with a screw rod 1 323 that penetrates and screws with the connecting block 322 at the corresponding position, and the four corners of one side of the fixed frame 31 are penetrated with an L-shaped hole 313, one end of the screw rod 1 323 penetrates the L-shaped hole 313 at the corresponding position and is fixedly connected with a sprocket 324, and a chain rolls between the two sprockets 324 at opposite positions, and the two opposite sides of the rectangular sleeve 1 311 and away from the fixed frame 31 are fixedly connected with a fixing block 314 that penetrates and rotates with the screw rod 1 323 at the corresponding position, and the end of the screw rod 1 323 away from the fixed frame 31 is fixedly connected with a nut 1 325.

[0027] In this embodiment, the two screw rods 323 at relative positions can be rotated by utilizing the driving of an electric wrench, and the rotating screw rod 323 can make the rectangular sleeve 321 at the corresponding position slide in the rectangular sleeve 311 at the corresponding position, and the rectangular sleeve 321 at both ends of the secondary truss 2 can fix the secondary truss 2 by screwing the screw rod 323 and the connecting block 322 at the corresponding position, so as to facilitate the fixation of the secondary truss 2 and facilitate the replacement of the deformed secondary truss 2 at a later time.

[0028] Embodiment 2

[0029] like Figure 2 , Figure 3 and Figure 6 As shown, in the present embodiment, both sides of one side of the rectangular sleeve 321 are fixedly connected with support blocks 315, and both sides of the rectangular sleeve 321 opposite to each other are penetrated with plug holes 326, the clamping assembly 33 includes two symmetrically arranged L-shaped plug blocks 331 plugged with the two plug holes 326, one end of the top surface of the L-shaped plug block 331 is fixedly connected with a connecting plate 332, a round rod 333 is rotatably penetrated between the two support blocks 315 at relative positions, both ends of the round rod 333 are fixedly connected with a screw rod 334 that penetrates and screws with the connecting plate 332 at the corresponding position, one end of the screw rod 334 is fixedly connected with a nut 335, and one side of the rectangular sleeve 1 311 opposite to each other is fixedly connected with a sliding rod 336 that slides through the L-shaped plug block 331 at the corresponding position, and one end of the sliding rod 336 is fixedly connected with a limiting block 337.

[0030] In this embodiment, the two screw rods 334 can be driven by an electric wrench to rotate simultaneously. The rotating screw rods 334 can make the two L-shaped plug blocks 331 at the corresponding positions approach each other until the opposite ends of the two L-shaped plug blocks 331 are inserted into the rectangular holes 21 at the corresponding positions. This can make the secondary truss 2 more stable, thereby preventing the secondary truss 2 from falling due to the rotation of the rectangular sleeves 321 at both ends of the secondary truss 2 under external force factors.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A large-span prestressed string grid structure, characterized in that: The invention comprises a plurality of main trusses (1), a plurality of secondary trusses (2) are arranged between two adjacent main trusses (1), a plurality of fixing mechanisms (3) are fixed at the positions corresponding to the secondary trusses (2) on the outer sides of the main trusses (1) and are plugged into the secondary trusses (2) at corresponding positions, the fixing mechanisms (3) comprising a fixing frame (31) fixed to the main trusses (1), a rectangular sleeve (311) is fixedly connected to the four side surfaces of the fixing frame (31), an installation component (32) is arranged inside the rectangular sleeve (311), a snap-on component (33) is arranged outside the rectangular sleeve (311), and the installation component (32) comprises a rectangular sleeve (321) sliding inside the rectangular sleeve (311) at the corresponding position.

2. A large-span prestressed string grid structure according to claim 1, characterized in that: The two opposite side surfaces of the rectangular sleeve 1 (311) are penetrated with a slide groove (312), and the two opposite side surfaces of the rectangular sleeve 2 (321) are fixedly connected with a connecting block (322) that slides with the slide groove (312) at the corresponding position, and the two ends of the four side surfaces of the fixed frame (31) are rotatably connected with a screw rod 1 (323) that penetrates and screws with the connecting block (322) at the corresponding position.

3. A large-span prestressed string grid structure according to claim 2, characterized in that: L-shaped holes (313) are formed through the four corners of one side of the fixing frame (31), one end of the screw rod (323) passes through the L-shaped hole (313) at the corresponding position and is fixedly connected to a sprocket (324), and a chain rolls between two sprockets (324) at opposite positions.

4. A large-span prestressed string grid structure according to claim 3, characterized in that: The two opposite side surfaces of the rectangular sleeve (311) and away from the fixing frame (31) are fixedly connected with fixing blocks (314) that penetrate and rotate with a screw rod (323) at a corresponding position, and one end of the screw rod (323) away from the fixing frame (31) is fixedly connected with a nut (325).

5. The large-span prestressed string grid structure according to claim 4, characterized in that: Support blocks (315) are fixedly connected to both sides of one side of the rectangular sleeve (321); plug holes (326) are penetrated through the two opposite side surfaces of the rectangular sleeve (321); the clamping assembly (33) comprises two symmetrically arranged L-shaped plug blocks (331) plugged into the two plug holes (326); a connecting plate (332) is fixedly connected to one end of the top surface of the L-shaped plug block (331); a round rod (333) is rotatably penetrated between the two support blocks (315) at relative positions; and screw rods (334) are fixedly connected to both ends of the round rod (333) and are screwed through the connecting plate (332) at the corresponding position.

6. A large-span prestressed string grid structure according to claim 5, characterized in that: One end of the second screw rod (334) is fixedly connected to a second nut (335), and the side surface of the first rectangular sleeve (311) opposite to the first rectangular sleeve is fixedly connected to a sliding rod (336) that slides through the L-shaped plug block (331) at the corresponding position, and one end of the sliding rod (336) is fixedly connected to a limiting block (337).

Images