CN201128958Y - Long-thread three-dimensional meridian dome net rod - Google Patents

Abstract

The utility model provides a long-thread three-directional meridian dome net rod, which comprises an upper layer of meridian net rods, an intermediate layer of meridian net rods, a lower layer of meridian net rods and a side ring. The upper layer of meridian net rods and intermediate layer of meridian net rods are connected and welded in the connecting position; the intermediate layer of meridian net rods and the lower layer of meridian net rods are connected and welded in the connecting position; the radius of curvature of each layer of meridian net rods are all the radius of the same ball; the radius of the side ring is 0.7 to 1.2 times of the radius of the radius of curvature of meridian net rods. The net rod is made by processing an angle steel or a joist. Compared with the structure of a two-way meridian net shell, the limit bearing capacity is improved by 10 percent under the condition of the same steel consumption. The structure can not only be used as the top of the large-scale storage tank, but also can be used as the roof of a circular building.

Description

Long thread three-dimensional meridian dome net bar

Technical field

The utility model relates to a kind of bearer network bar of spherical construction, the particularly roof of large storage tank tank deck and rotunda.

Background technology

For the bearer network bar of spherical construction, for example the large storage tank tank deck mainly contains geographic mesh bar, assembling short distance gauze bar and two-way net radial bar at present.The geographic mesh bar adopts warp and parallel to arrange the net bar, and parallel net bar radius of curvature has nothing in common with each other, and makes difficulty, and structural configuration is inhomogeneous, and it is big to consume steel material.Assembling short distance gauze bar adopts the i iron straight-bar, and the band steel that utilizes rod end to extend out inserts in the groove of hub type node, adopts two plectanes to clamp the upper and lower surface of hub node, penetrates a bolt again and is fixed, in case play about the net bar.This class formation net shell is used more at the oil tank tank deck, but since net shell node be difficult to meet and rigidly connect requirement.There is repeatedly accident to take place in recent years.The net bar of two-way net radial bar both direction is the sphere bus, and net bar radius of curvature is identical, but its formed grid is a quadrangle, its supporting capacity relatively a little less than.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned shortcoming of prior art, and a kind of long thread three-dimensional meridian dome net bar is provided, and has improved ultimate bearing capacity.

To achieve these goals, the utility model has adopted following technical scheme: a kind of long thread three-dimensional meridian dome net bar, comprise upper strata net radial bar, intermediate layer net radial bar, lower floor's net radial bar and side ring, upper strata net radial bar and intermediate layer net radial bar weld in the intersection, intermediate layer net radial bar and lower floor's net radial bar weld in the intersection, each straton noon gauze bar radius of curvature is the same radius of a ball, and the side ring radius is 0.7-1.2 a times of net radial bar radius of curvature.The net bar is processed by angle steel or brigade steel.

The utility model increases a meridian on the basis of two-way net radial shell, make all net shell grids be triangle, load one displacement whole process analysis through geometrical non-linearity is calculated, this structure is compared with two-way net radial shell structure, under the situation of same steel consumption amount, ultimate bearing capacity strengthens 10% approximately.This structure not only can be used for the large storage tank tank deck, can also be used for the roof of rotunda.

Description of drawings

Fig. 1 is the meridianal theoretical deposition figure of three-dimensional.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is a net bar welding manner partial schematic diagram.

Fig. 4 is a net bar welding manner partial schematic diagram.

The specific embodiment

As depicted in figs. 1 and 2, the utility model comprises upper strata net radial bar 1, intermediate layer net radial bar 2, lower floor's net radial bar 3 and side ring 4.Upper strata net radial bar 1 welds in the intersection with intermediate layer net radial bar 2, intermediate layer net radial bar 2 welds in the intersection with lower floor's net radial bar 3, each straton noon gauze bar radius of curvature is the same radius of a ball, and side ring 4 radiuses are 0.7-1.2 times of net radial bar radius of curvature.The net bar is processed by angle steel or brigade steel.

When the upper and lower are angle steel 5, when the intermediate layer was i iron 6, three-dimensional net radial bar was the structure of intersection (two width of cloth figure are results that different angles are watched) as shown in Figure 3 and Figure 4.

Claims (2)

1, a kind of long thread three-dimensional meridian dome net bar, it is characterized in that comprising upper strata net radial bar (1), intermediate layer net radial bar (2), lower floor's net radial bar (3) and side ring (4), upper strata net radial bar (1) welds in the intersection with intermediate layer net radial bar (2), intermediate layer net radial bar (2) welds in the intersection with lower floor's net radial bar (3), each straton noon gauze bar radius of curvature is the same radius of a ball, and side ring (4) radius is 0.7-1.2 a times of net radial bar radius of curvature.

2, long thread three-dimensional meridian dome net bar as claimed in claim 1 is characterized in that the net bar is processed by angle steel or brigade steel.

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