CN201433469Y - A steel structure spherical crown node - Google Patents

Abstract

The utility model relates to a steel truss or a steel net frame bar connecting a spherical crown node. The currently used bolted ball joints have certain limitations and cannot be used when the connected rods have a large cross-section; welding hollow ball joints requires welding when there are many rods that meet at the same node and the cross-section of the rods is large The diameter of the sphere is very large, which affects the appearance of the building and causes a large gap between the building roof envelope and the steel structure; when there are many rods that meet at the same node and the mutual angle is small, it will cause local welding It is very difficult, there are many overlapping welds in the same area, and the quality is difficult to control. The utility model is characterized in that: it includes a hollow sphere and a cover plate, the hollow sphere is a spherical crown, and the upper end of the hollow sphere is provided with a cover plate to form a spherical crown-shaped connection node. The utility model ensures that all the rods can be reliably connected when there are many rods converging on the same node, reliable force transmission, large bearing capacity, strong versatility, beautiful appearance, convenient installation and guaranteed quality.

Description

A steel structure spherical crown node

technical field

The utility model belongs to the technical field of steel structure engineering and relates to a steel truss or a steel net frame bar connecting spherical crown nodes.

technical background

The joint forms of steel structure grid and truss member connection mainly include the following types, plate hinge joint, bolt ball joint, welded hollow ball joint, and intersecting joint.

Plate hinge joints are mainly suitable for trusses or grid members with section steel (angle steel, channel steel, etc.), and are mostly used in industrial buildings, such as steel structure workshops and warehouses. It is rarely used in architectural steel structure engineering.

Bolt ball joints are mainly suitable for steel grid structures. The grid members are connected with solid steel balls through high-strength bolts. It has the characteristics of beautiful appearance and a large number of connected rods. This kind of joint form has certain limitations, and it cannot be used when the connected rods have a large cross-section, so it cannot be applied to long-span steel pipe truss structures.

Welded hollow ball joints are mainly for long-span steel pipe truss structures. When there are many rods that meet at the same node, in order to ensure reliable connection of all rods, hollow balls are set at the nodes, and all rods are welded on the hollow spheres. It has the characteristics of reliable force transmission, large bearing capacity, and strong versatility. However, when there are many rods that meet at the same node and the cross-section of the rods is large, the diameter of the welding sphere required is large, which affects the appearance of the building and causes architectural problems. There is a large gap between the roof envelope and the steel structure.

Intersecting joint is a joint form that has been widely used in recent years. It is mainly used in long-span steel pipe truss structures. There are no other components attached to the joints, and the thinner members are directly welded to the thicker main members. Good architectural appearance effect. When there are many rods meeting at the same node and the mutual angle is small, local welding will be very difficult. There are many overlapping welds in the same area, and the quality is difficult to control.

Utility model content

The technical problem to be solved by the utility model is to provide a steel structure spherical crown node with reliable force transmission, large bearing capacity, strong versatility and beautiful appearance.

For solving above-mentioned technical problem, the technical scheme that the utility model takes:

The utility model is special in that it includes a hollow sphere and a cover plate, the hollow sphere is a spherical crown, and the upper end of the hollow sphere is provided with a cover plate to form a spherical crown-shaped connection node.

Stiffening ribs are arranged inside the above-mentioned hollow sphere.

Above-mentioned cover plate adopts circular steel plate.

There is a gap between the above-mentioned cover plate and the truss member.

Compared with the prior art, the utility model ensures that all the rods can be reliably connected when there are many rods converging at the same node, reliable force transmission, large bearing capacity, strong versatility, beautiful appearance, convenient installation and The quality is guaranteed; at the same time, the use of spherical crown spheres overcomes the shortcomings of the large volume of the entire sphere and poor architectural appearance.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the assembly diagram of the utility model.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 , the utility model includes a hollow sphere 1 and a cover plate 2, the hollow sphere 1 is spherical, and the upper end thereof is provided with a cover plate 2 to form a spherical connecting node.

See Figure 2. The size of the hollow sphere 1 is determined according to the number and diameter of the connected rods. It must be ensured that all the rods can be reliably welded on the hollow sphere 1 without interference, and at the same time, the minimum weld gap is guaranteed to ensure the welding Quality; determine the wall thickness of the hollow sphere 1 and whether it is necessary to install an inner stiffener according to the force on the rod. The redundant part of the hollow sphere 1 is cut off to form a spherical crown shape. At the same time, the cover plate 2 using a circular steel plate is welded. Ensure that the edge of the cover plate 2 and the hollow sphere 1 are reliably welded, and a certain gap should be reserved between the cover plate and the truss member 3 to ensure that the welds do not overlap to ensure welding quality.

Claims (4)

1, a kind of steel work spherical crown node is characterized in that: comprise hollow ball (1), cover plate (2), hollow ball (1) is a ball crown type, and its upper end is provided with cover plate (2), constitutes the ball crown type connected node.

2, a kind of steel work spherical crown node according to claim 1, it is characterized in that: described hollow ball is provided with stiffening rib in (1).

3, a kind of steel work spherical crown node according to claim 1 and 2, it is characterized in that: described cover plate (2) adopts circular steel plate.

4, a kind of steel work spherical crown node according to claim 3 is characterized in that: be provided with the gap between described cover plate (2) and truss member (3).

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