Prestressed steel truss structure

Abstract

The utility model relates to the technical field of steel trusses, in particular to a prestressed steel truss structure. According to the technical scheme, the structure comprises upper chords, a rear frame head, a front frame head, lower chords and prestressed steel strands, the number of the upper chords and the number of the lower chords are two, the end positions of the upper chords and the end positions of the lower chords are fixed to the four corners of the rear frame head and the four corners of the front frame head respectively, bases are symmetrically arranged on the lower surfaces of the lower chords, and the prestressed steel strands are arranged on the bases. Prestressed steel strands are connected and installed between the bases through tensioning assemblies. The prestressed steel strands can be additionally arranged on the prestressed steel truss through the matching of the structures, so that the tension problem of the lower chord member is solved, the steel consumption is reduced, and the tightening degree of the prestressed steel strands can be adjusted through the matching of the tensioning assemblies.

Description

Technical Field

[0001] The utility model relates to the technical field of steel trusses, in particular to a prestressed steel truss structure. Background Art

[0002] Steel truss refers to a truss made of steel.

[0003] During the use of prestressed steel trusses, the lower chord of the steel trusses is subjected to tension. In order to stabilize the tension, the amount of steel needs to be increased, resulting in a high manufacturing cost of the steel trusses.

[0004] To this end, we proposed a prestressed steel truss structure to solve the existing problems. Utility Model Content

[0005] The utility model aims to propose a prestressed steel truss structure in view of the problems existing in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a prestressed steel truss structure, including an upper chord, a rear frame head, a front frame head, a lower chord and prestressed steel strands, wherein there are two upper chords and two lower chords respectively, and the end positions of each of the upper chords and the lower chords are respectively fixed at the four corners of the rear frame head and the front frame head, and the lower surface of the lower chord is symmetrically provided with bases, and the prestressed steel strands are installed between the bases through a tensioning assembly.

[0007] Preferably, the upper chords and the lower chords are connected to each other through horizontal rods respectively.

[0008] Preferably, the upper chord and the lower chord are connected to each other via a triangular rod group, the single-headed end of the triangular rod group is fixed on the upper chord, and the triple-headed end of the triangular rod group is fixed on the lower chord.

[0009] Preferably, the tensioning assembly is composed of a rotating frame, a prestressed steel strand, a screw and two mounting heads are symmetrically provided at both ends of the prestressed steel strand, and the mounting heads are rotatably mounted on the rotating frame.

[0010] Preferably, the screw is fixed on the base, and the screw is in threaded engagement with the rotating frame.

[0011] Preferably, a threaded hole matched with the screw is provided on the rotating frame, and the screw is threadably mounted on the threaded hole.

[0012] Preferably, there are two prestressed steel strands, and the positions of the two prestressed steel strands correspond to the positions of the two lower chords.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] During the use of the prestressed steel truss structure of the utility model, a prestressed steel strand can be provided on the prestressed steel truss composed of the upper chord, the lower chord, the rear frame head and the front frame head, and the prestressed steel strand is isolated and fixed at a distance from the lower chord;

[0015] During the process of fixing the prestressed steel strand, the rotating frames rotatably installed at both ends of the prestressed steel strand can be threadedly engaged with the screws of the base on the steel truss. By rotating the rotating frame, the length of the screw entering the rotating frame can be adjusted, thereby adjusting the tension of the prestressed steel strand;

[0016] The utility model can add prestressed steel strands to the prestressed steel truss to solve the tension problem of the lower chord, reduce the amount of steel used, and the tension of the prestressed steel strands can be adjusted through the cooperation of the tensioning components. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the tensioning assembly structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the tensioning assembly of the utility model.

[0021] Reference numerals:

[0022] 1. Upper chord; 2. Rear frame head; 3. Front frame head; 4. Horizontal rod; 5. Triangular rod group; 6. Rotating frame; 7. Base; 8. Lower chord; 9. Prestressed steel strand; 10. Screw; 11. Installation head. DETAILED DESCRIPTION

[0023] 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.

[0024] Embodiment 1

[0025] like Figure 1-Figure 4As shown, the prestressed steel truss structure proposed by the utility model includes an upper chord 1, a rear frame head 2, a front frame head 3, a lower chord 8 and a prestressed steel strand 9. There are two upper chords 1 and two lower chords 8 respectively. The end positions of each upper chord 1 and lower chord 8 are respectively fixed at the four corners of the rear frame head 2 and the front frame head 3. The lower surface of the lower chord 8 is symmetrically provided with bases 7, and the prestressed steel strands 9 are installed between the bases 7 through a tensioning assembly.

[0026] Based on Example 1:

[0027] During the use of the prestressed steel truss structure of the utility model, a prestressed steel strand 9 can be provided on the prestressed steel truss composed of the upper chord 1, the lower chord 8, the rear frame head 2, and the front frame head 3, and the prestressed steel strand 9 is isolated and fixed at a distance from the lower chord 8;

[0028] During the process of fixing the prestressed steel strand 9, the rotating frame 6 rotatably installed at both ends of the prestressed steel strand 9 can be threadedly engaged with the screw 10 of the base 7 on the steel truss. By rotating the rotating frame 6, the length of the screw 10 entering the rotating frame 6 can be adjusted, thereby adjusting the tension of the prestressed steel strand 9.

[0029] Embodiment 2

[0030] like Figure 1-Figure 4 As shown, the prestressed steel truss structure proposed by the utility model, compared with the first embodiment, this embodiment also includes: the upper chord rods 1 and the lower chord rods 8 and the lower chord rods 8 are respectively connected to each other through horizontal rods 4, and the connection strength between the upper chord rods 1 and the upper chord rods 1 and the lower chord rods 8 and the lower chord rods 8 is increased through the design of the horizontal rods 4.

[0031] The upper chord 1 and the lower chord 8 are connected to each other through a triangular rod group 5, the single end of the triangular rod group 5 is fixed on the upper chord 1, and the three ends of the triangular rod group 5 are fixed on the lower chord 8. The design of the triangular rod group 5 increases the connection strength between the upper chord 1 and the lower chord 8.

[0032] The tensioning assembly is composed of a rotating frame 6, a prestressed steel strand 9, a screw 10, and two mounting heads 11 are symmetrically provided at both ends of the prestressed steel strand 9. The mounting heads 11 are rotatably mounted on the rotating frame 6. The screw 10 is fixed on the base 7. The screw 10 and the rotating frame 6 are in a threaded engagement state. A threaded hole matching the screw 10 is provided on the rotating frame 6, and the screw 10 is threadedly mounted on the threaded hole. During use, the rotating frame 6 is rotated to adjust the length of the screw 10 entering the rotating frame 6, thereby adjusting the tension of the prestressed steel strand 9.

[0033] There are two prestressed steel strands 9 , and the positions of the two prestressed steel strands 9 correspond to the positions of the two lower chords 8 .

[0034] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0035] 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.

Claims

1. A prestressed steel truss structure, comprising an upper chord (1), a rear frame head (2), a front frame head (3), a lower chord (8) and a prestressed steel strand (9), characterized in that: There are two upper chord rods (1) and two lower chord rods (8), and the ends of the upper chord rods (1) and the lower chord rods (8) are respectively fixed at the four corners of the rear frame head (2) and the front frame head (3). The lower surface of the lower chord rod (8) is symmetrically provided with bases (7), and prestressed steel strands (9) are installed between the bases (7) through a tensioning assembly.

2. The prestressed steel truss structure according to claim 1, characterized in that: The upper chord rods (1) and the lower chord rods (8) and the lower chord rods (8) are connected to each other through respective horizontal rods (4).

3. The prestressed steel truss structure according to claim 1, characterized in that: The upper chord (1) and the lower chord (8) are connected to each other via a triangular rod group (5), the single end of the triangular rod group (5) is fixed to the upper chord (1), and the triple end of the triangular rod group (5) is fixed to the lower chord (8).

4. The prestressed steel truss structure according to claim 1, characterized in that: The tensioning assembly is composed of a rotating frame (6), a prestressed steel strand (9), a screw rod (10), and two mounting heads (11) are symmetrically provided at both ends of the prestressed steel strand (9). The mounting heads (11) are rotatably mounted on the rotating frame (6).

5. The prestressed steel truss structure according to claim 4, characterized in that: The screw rod (10) is fixed on the base (7), and the screw rod (10) and the rotating frame (6) are in a threaded engagement state.

6. The prestressed steel truss structure according to claim 4, characterized in that: The rotating frame (6) is provided with a threaded hole matched with the screw rod (10), and the screw rod (10) is threadedly mounted on the threaded hole.

7. The prestressed steel truss structure according to claim 1, characterized in that: There are two prestressed steel strands (9) in total, and the positions of the two prestressed steel strands (9) correspond to the positions of the two lower chords (8).

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