CN103898990B - One is threaded individual layer spatial mesh structure - Google Patents

Abstract

The invention relates to a threaded single-layer spatial grid structure, which is mainly composed of basic units, connecting rods and sleeves with internal threads through threaded connections. The basic unit is welded by welding balls and joints of multiple long thread segments, and the connecting rod is welded by joints of short thread segments and a tubular rod. The connecting rod connects two long threaded segment joints between different basic units through a sleeve. The assembled units of different shapes can be formed through the connection of multiple different basic units, and then can be expanded or assembled into single-layer spatial grid structures of different shapes, such as single-layer cylindrical reticulated shells and single-layer spherical reticulated shells. The invention improves its structure on the basis of welding balls to make it more convenient to install, and all the construction sites are connected by threads, which can effectively shorten the construction period and cost, and is applicable to various forms of single-layer space grid structure systems.

Description

A screw-connected single-layer spatial grid structure

technical field

The invention relates to a single-layer space grid structure adopting screw connection, which belongs to the field of new building structure systems.

Background technique

The reticulated shell structure has been greatly promoted and applied in industrial and civil buildings due to its advantages of reasonable force, good structural stability and convenient construction. Single-layer spatial grid structures such as single-layer spherical reticulated domes and single-layer cylindrical reticulated domes have been widely used in recent years because of their lighter structures. The commonly used single-layer spatial grid structure generally adopts welded ball nodes and bolted ball nodes. With the application in engineering, this single-layer spatial grid structure system with welded ball joints and bolted ball joints as the connection form has exposed some of its own shortcomings, mainly in the following aspects:

1. The welding ball is a connection system. The welding workload of the system is large on site. In most cases, the workpiece cannot turn over during welding, resulting in all-position welding with downward, side and upward welding in a circle of welds. The welding requirements are high and difficult, and the welding quality is not easy to guarantee; at the same time, the construction period of the system is long and the construction cost is high;

2. The system in which the bolt ball is the connection form can realize the assembly construction of components, but during construction, problems such as "false tightening" and "difficulty in closing" often occur, causing certain safety hazards in the structure.

Contents of the invention

In order to realize the rapid construction of the single-layer spatial grid structure, the present invention proposes a screw-connected single-layer spatial grid structure. The structure of the system is simple, the construction is convenient, the bearing capacity is reliable, and the economy of the structure can be improved. The specific technical scheme is as follows:

A threaded single-layer space grid structure, including a basic unit (1), a connecting rod (2) and a sleeve (3) with internal threads; the basic unit (1) is composed of welding balls (4) and multiple A long threaded joint (5) is welded; the connecting rod (2) includes a tubular rod (7) and a short threaded joint (6), and the two ends of the tubular rod (7) are respectively connected to the short threaded joint The unthreaded end of (6) is fixedly connected by welding; the sleeve (3) connects the short threaded joint (6) in the connecting rod (2) with the long threaded joint (5) on the basic unit (1) through the internal thread to connect.

The basic unit (1) has different numbers and different directions of joints according to the pre-design, and the welding ball (4) is fixedly connected with the unthreaded end of the long thread section joint (5) by welding.

The long threaded section joint (5) is machined to form an external thread, the short threaded section joint (6) is machined to form an external thread with the same tooth shape and pitch, and the depth is half of the long threaded section joint (5). (3) The internal thread with the same tooth shape, pitch and depth as the long threaded joint (5) is formed by machining, and the long threaded joint (5) and the short threaded joint (6) are connected through the sleeve (3) , after connection, the sleeve is evenly distributed on the two joints.

The screw connection has the characteristics of reliable force transmission, convenient processing and simple disassembly, which provides a technical basis for the rapid installation of structures.

The assembled units of different shapes can be formed through the connection of multiple different basic units, and then can be expanded or assembled into single-layer spatial grid structures of different shapes, such as single-layer cylindrical reticulated shells and single-layer spherical reticulated shells.

The screw-connected assembled space grid structure is fixed on the lower support structure through support nodes. The support nodes can choose the commonly used supports in space grid structures such as arc pressure supports.

Beneficial effect

The beneficial effect of the present invention is that by connecting the threaded joint at the end of the welding ball and the end of the rod, the original on-site welding is changed to a convenient threaded connection, which effectively improves the construction efficiency and shortens the construction period. Reduce construction costs; it effectively improves the accuracy and quality of welding through factory prefabricated production and processing. The structure is especially suitable for various types of single-layer space grid structure systems with small and medium spans, such as single-layer cylindrical reticulated shells and single-layer spherical reticulated shells.

Description of drawings

Fig. 1 embodiment one assembly schematic diagram;

Figure 2 is a schematic diagram of the second embodiment of the assembly;

Fig. 3 schematic diagram of basic unit structure;

Fig. 4 schematic diagram of connecting rod structure;

Figure 5 Schematic Diagram 1 of Structural Installation Steps;

Figure 6 Schematic diagram of structural installation steps II;

Figure 7 Schematic diagram of structural installation steps three;

Figure 8 is a schematic diagram of a single-layer spherical reticulated shell connected by threads.

In the figure, 1-basic unit; 2-connecting rod; 3-sleeve; 4-welding ball; 5-long thread segment joint; 6-short thread segment joint; 7-tubular rod.

Specific implementation method

The structure of the present invention will be described below in conjunction with two embodiments of different shapes in Fig. 1 and Fig. 2, and in conjunction with its design, processing and installation process.

Embodiment one:

Each component of the present invention is processed by mechanical processing or first casting and then mechanical processing. In order to ensure the accuracy, each part can be processed by machining, or a combination of casting and machining. In addition, welding is carried out in the factory, which can guarantee the product quality.

As shown in Figure 1, in this embodiment, the basic unit (1) has two structures according to actual needs, one is the basic unit in the middle of the structure, which is provided with joints in 12 directions, and the other is the joints around the structure There are 4 directions of joints, the specific number and direction can be adjusted according to the actual situation. The joints in each direction of the basic unit in the middle of the structure are connected to the joints around one structure through connecting rods (2) and sleeves (3), and the joints around the 12 structures are connected to each other through connecting rods (2) and sleeves (3) Connected to form an umbrella structure.

The welding ball (4) is fixedly connected to the long threaded section joint (5) by welding, and the structure of the basic unit is shown in Figure 3.

All machining, welding and other industries of the present invention can be prefabricated in the factory, reducing the workload on the construction site and shortening the construction period.

The specific installation steps are as follows:

Fully screw the internally threaded sleeve (3) onto the corresponding long threaded section connector (5) of the base unit (1), as shown in Figure 5.

When connecting different basic units (1), after aligning the short threaded joint (6) of the connecting rod (2) with the corresponding long threaded joint (5) (Fig. 6), reversely rotate the sleeve (3) so that The short threaded segment joint (6) is completely inside the sleeve (3), as shown in Figure 7. Repeat this operation to connect the joint at the other end of the connecting rod to complete the connection of the two basic units (1).

Repeat the above steps to complete the assembly of the circular structure of this embodiment, and reserve some joints around the structure to facilitate the expansion of the structure and the connection between structures of different shapes.

Embodiment two:

Each component of the present invention is processed by machining or machining after casting, and the machining requirements are the same as those in Embodiment 1. As shown in Figure 2, in this embodiment, there is only one basic unit (1) of structure, that is, joints with four directions set according to actual needs, four basic units are selected, and the two adjacent basic units The space is connected by connecting rods (2) and sleeves (3) to form a quadrilateral structure. Some joints are reserved around the structure to facilitate the expansion of the structure and the connection between structures of different shapes.

The processing steps of the basic unit (1), the connecting rod (2), and the connection steps between the basic units (1) are the same as those in the first embodiment.

The present invention can be connected into different assembled units according to the actual situation, and then can be expanded or assembled into a single-layer spherical reticulated shell, as shown in FIG. 8 .

The assembled spatial grid structure is threaded and fixed on the lower supporting structure through the support nodes. The support nodes can choose the commonly used supports in space grid structures such as arc pressure supports.

Adopting the form of the present invention can improve the construction efficiency of the single-layer spatial grid structure and improve economic benefits. Spherical reticulated shell, etc.

Claims (3)

1. A threaded single-layer space grid structure, characterized in that it includes a basic unit (1), a connecting rod (2) and a sleeve (3) with internal threads; the basic unit (1) is welded The ball (4) is welded with a plurality of long threaded segment joints (5); the connecting rod (2) includes a tubular rod (7) and a short threaded segment joint (6), and the two ends of the tubular rod (7) The non-threaded end of the short threaded section joint (6) is fixedly connected by welding; the sleeve (3) connects the short threaded section joint (6) in the connecting rod (2) with the upper length of the basic unit (1) through internal threads Threaded segment joint (5) for connection. 2. A threaded single-layer space grid structure according to claim 1, characterized in that: the basic unit (1) has joints of different numbers and directions according to pre-design, and the welding ball ( 4) The unthreaded end of the long threaded section joint (5) is fixedly connected by welding. 3. A threaded single-layer spatial grid structure according to claim 1, characterized in that: the long threaded joint (5) is machined to form an external thread, and the short threaded joint (6) is machined Machining forms an external thread with the same tooth shape and pitch and half the depth of the long threaded joint (5), and the sleeve (3) is machined to form an internal thread with the same tooth shape, pitch and depth as the long threaded joint (5) , the long threaded section joint (5) is connected with the short threaded section joint (6) through the sleeve (3), and after the connection, the sleeve is evenly distributed on the two joints.