Improved triple-cylindrical surface latticed shell membrane structure

Abstract

The utility model discloses an improved three-center cylindrical surface reticulated shell membrane structure belongs to environmental protection closed technical field, the utility model discloses an improved three-center cylindrical surface reticulated shell membrane structure, including three center cylindrical surface reticulated shell and the roofing membrane of laying in three center cylindrical surface reticulated shell surface, three center cylindrical surface reticulated shell includes main truss, ridge truss and slope truss, and a plurality of main trusses of parallel arrangement are arc mouth downward arc architecture, two arc bottom fixedly connected on support column, and the ridge truss is fixedly connected with the main truss after the arc top end through ridge truss series type through a plurality of main trusses, the main truss below ridge truss, the slope truss is fixedly connected with the main truss after the slope truss series type through a plurality of main trusses through left and right symmetry, and the main truss is elevated in the ridge part, and the top node of ridge truss and adjacent left and right node form the slope of slope m >= 5%, can satisfy the slope requirement of roof surface natural skiing while satisfying the dual effect of environmental protection closed and guaranteeing structure safety.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection enclosure technology, and more specifically to an improved three-centered cylindrical mesh membrane structure. Background Technology

[0002] With the continuous strengthening of national environmental protection measures, open-air raw material storage yards in the metallurgical, coal, and power industries will gradually adopt the form of enclosed mesh sheds to reduce raw material loss and dust. Open-air raw material storage yards are often large-span and long, containing large-scale material handling equipment. Three-centered cylindrical mesh shell membrane enclosures are widely used for environmentally friendly enclosure of open-air storage yards due to their low cost and fast construction speed. After enclosure, they can effectively improve the working environment of the site and reduce the impact of dust on the environment.

[0003] Existing three-centered cylindrical reticulated shells, such as Figure 5 As shown, this is a double-layered spatial structure composed of three smoothly connected circular arc segments of different radii: the middle circular arc segment II and the two circular arc segments I on either side. It features large span, high clearance, and flexible shape, and is widely used in large-span industrial and public buildings such as coal sheds and stadiums. However, the ridge is very gentle, which cannot meet the slope requirements for natural skidding and drainage of the roof membrane. In areas with high snow loads, snow tends to accumulate on the ridge in winter, causing excessive deformation of the roof membrane and creating a "water bag effect," which directly compresses the main steel structure and affects structural safety. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model

[0005] To address the problem that existing three-centered cylindrical mesh membrane structures tend to trap snow on the ridge in winter, affecting structural safety, this invention provides an improved three-centered cylindrical mesh membrane structure. By increasing the slope of the ridge section where the ridge truss is located, it achieves the goal of preventing snow trapping while also ensuring environmental protection, enclosure, and structural safety.

[0006] 2. Technical Solution

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] An improved three-centered cylindrical reticulated shell membrane structure includes a three-centered cylindrical reticulated shell and a roof membrane laid on the surface of the three-centered cylindrical reticulated shell. The three-centered cylindrical reticulated shell includes main trusses, ridge trusses, and slope trusses. Multiple parallel main trusses are arc-shaped structures with downward-curving ends. The two bottom ends of the arcs are fixedly connected to supporting columns. The top ends of the arcs pass through multiple main trusses in series through the ridge trusses, and the ridge trusses are fixedly connected to the main trusses. The main trusses below the ridge trusses pass through multiple main trusses in series through left and right symmetrical slope trusses, and the slope trusses are fixedly connected to the main trusses. The main trusses are raised at the ridge, so that the slope m formed by the top node of the ridge truss and the adjacent left and right nodes is ≥5%. This structure not only meets the dual requirements of environmental protection and structural safety, but also meets the slope requirements for natural skiing on the roof.

[0009] A further technical solution is to align the top elevation of the ridge truss with that of the main truss, and to allow the slope trusses below the ridge truss to deflect downwards in sequence with a deflection slope of n≥7%, so that the roof surface can withstand large snow accumulation and falling snow loads after the snow naturally slides off.

[0010] A further technical solution is to ensure that after the slope truss deflects downwards, the slope of the upper chord is slightly greater than the slope of the roof membrane, thus preventing the roof membrane from contacting the upper chord of the slope truss.

[0011] A further technical solution involves fixing the roof membrane to the main truss and ridge truss at the ridge via a membrane connection plate to prevent the roof membrane from dislodging.

[0012] A further technical solution involves fixing the roof membrane to the main truss at non-ridge locations using membrane connection plates. The main trusses are deflected downwards by the form-finding slope, separating them from the slope trusses and preventing them from being connected. This avoids the slope trusses affecting the form-finding slope of the roof membrane, hindering the natural sliding of snow off the roof, and compromising structural safety.

[0013] A further technical solution involves fixing the main truss and the slope truss together with intermittently arranged cross braces to increase the stability of the main structure.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] This utility model's improved three-centered cylindrical mesh membrane structure effectively solves the structural safety hazards caused by the gentle ridge in traditional standard three-centered circular mesh membrane structures by raising the ridge elevation and increasing the slope of the ridge. At the same time, by deflecting the upper chord of the slope truss, it avoids the slope truss affecting the roof membrane's shape-finding slope and hindering the natural sliding of snow on the roof, thus achieving the effect of balancing environmental protection and structural safety. Attached Figure Description

[0017] Figure 1 for Figure 2 A magnified view of part A;

[0018] Figure 2 This is a top plan view of the improved three-centered cylindrical reticulated membrane structure according to a specific embodiment;

[0019] Figure 3 This is a side cross-sectional view of the improved three-centered cylindrical reticulated membrane structure according to a specific embodiment;

[0020] Figure 4 for Figure 3 A magnified view of the top;

[0021] Figure 5 This is a side cross-sectional view of a prior art three-centered cylindrical reticulated membrane structure.

[0022] Figure 6 This is a schematic diagram of the longitudinal elevation of the ridge truss in a specific embodiment;

[0023] Figure 7 This is a schematic diagram of the longitudinal elevation of the slope truss at the non-ridge section of a specific embodiment.

[0024] Figure 8 This is a partially enlarged schematic diagram of the slope truss in a specific embodiment.

[0025] In the diagram: 1-Main truss; 2-Ridge truss; 3-Slope truss; 4-Cross bracing; 5-Roof membrane; 6-Tension membrane connection plate; 7-Support column; 31-Top chord. Detailed Implementation

[0026] To further understand the contents of this utility model, a detailed description of the utility model is provided in conjunction with the accompanying drawings.

[0027] Example 1

[0028] This embodiment presents an improved three-centered cylindrical reticulated shell membrane structure, which modifies a three-centered cylindrical reticulated shell with a length of 175m, a span of 80m, and a apex height of 33m. Figure 1 , 2As shown in Figures 3 and 4, the structure includes a three-centered cylindrical reticulated shell and a roof membrane 5 laid on the surface of the shell. In this embodiment, the three-centered cylindrical reticulated shell includes 12 main trusses 1, 1 ridge truss 2, and 4 slope trusses 3. The 12 parallel main trusses 1 are arc-shaped structures with their arc ends pointing downwards. The two bottom ends of the arcs are fixedly connected to support columns 7. The top ends of the arcs pass through the 12 main trusses 1 in series via the ridge truss 2, after which the ridge truss 2 is fixedly connected to the main trusses 1. Below the ridge truss 2, the main trusses 1 pass through the 12 main trusses 1 in series via two symmetrical slope trusses 3 on the left and right, after which the slope trusses 3 are fixedly connected to the main trusses 1. The main trusses 1 are raised 600–1200 mm at the ridge section via the ridge truss 2, and the left and right nodes of adjacent ridges are correspondingly raised 300–800 mm. Figure 4 The dotted line position is raised to the solid line position, so that the slope m of the slope formed by the top node of the ridge truss 2 and the adjacent left and right nodes is ≥5%. While meeting the dual effects of environmental protection and structural safety, it can also meet the slope requirements of natural skiing on the roof surface.

[0029] Example 2

[0030] The improved three-centered cylindrical reticulated membrane structure of this embodiment has the same basic structure as in Embodiment 1, but the difference or improvement is as follows: Figure 3 , 4 As shown in Figures 6, 7, and 8, the top elevation of the ridge truss 2 is flush with that of the main truss 1. The two slope trusses 3 below the ridge truss 2 deflect downwards sequentially, with a deflection slope of n ≥ 7%. This allows the roof surface to withstand significant snow accumulation and falling loads after snow naturally slides off. After the slope trusses 3 deflect downwards, the slope of the upper chord 31 is slightly greater than the deflection slope of the roof membrane 5, preventing close contact between the roof membrane 5 and the upper chord 31 of the slope trusses 3. At the ridge, the roof membrane 5 is fixedly connected to the main truss 1 and the ridge truss 2 via a membrane connection plate 6, preventing the roof membrane 5 from dislodging. At non-ridge locations, the roof membrane 5 is fixedly connected to the main truss 1 via the membrane connection plate 6. The main trusses 1 deflect downwards through a form-fitting slope, separating them from the slope trusses 3 and preventing them from affecting the form-fitting slope of the roof membrane 5, hindering the natural sliding of snow off the roof, and compromising structural safety. The main truss 1 and the slope truss 3 are fixedly connected by intermittently arranged cross braces 4 to increase the stability of the main structure.

[0031] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited to these. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An improved three-centered cylindrical reticulated membrane structure, characterized in that: The structure includes a three-centered cylindrical reticulated shell and a roof membrane (5) laid on the surface of the three-centered cylindrical reticulated shell. The three-centered cylindrical reticulated shell includes a main truss (1), a ridge truss (2), and a slope truss (3). The parallel main trusses (1) are arc-shaped structures with the arc openings facing downwards. The two arc bottoms are fixedly connected to the support columns (7). The arc tops pass through the ridge truss (2) in series through the multiple main trusses (1), and the ridge truss (2) is fixedly connected to the main truss (1). The main trusses (1) below the ridge truss (2) pass through the multiple main trusses (1) in series through the left and right symmetrical slope trusses (3), and the slope truss (3) is fixedly connected to the main truss (1). The slope of the slope formed by the top node of the ridge truss (2) and the adjacent left and right nodes is greater than or equal to 5%.

2. The improved three-centered cylindrical mesh shell membrane structure according to claim 1, characterized in that: The top elevation of the ridge truss (2) is flush with that of the main truss (1). The slope trusses (3) below the ridge truss (2) deflect downwards in sequence, with a deflection slope of n≥7%.

3. The improved three-centered cylindrical reticulated membrane structure according to claim 2, characterized in that: After the slope truss (3) deflects downwards, the slope of the upper chord (31) is greater than the slope of the roof membrane (5) deflection.

4. The improved three-centered cylindrical reticulated membrane structure according to claim 2, characterized in that: The roof membrane (5) is fixedly connected to the main truss (1) and the ridge truss (2) at the ridge position via a membrane connecting plate (6).

5. The improved three-centered cylindrical reticulated membrane structure according to claim 4, characterized in that: The roof membrane (5) is fixedly connected to the main truss (1) at the non-ridge section via a membrane connection plate (6).

6. The improved three-centered cylindrical reticulated membrane structure according to any one of claims 1-5, characterized in that: The main truss (1) and the slope truss (3) are fixedly connected by cross bracing (4).

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