Bolt connection type hollow sphere joint for steel grid structure

Abstract

The utility model relates to the technical field of construction of a steel grid structure, in particular to a spherical connecting joint of the steel grid structure, and particularly relates to a bolt connection type hollow spherical joint for the steel grid structure. Comprising a hollow foundation ball body, holes are formed in the surface of the foundation ball body, and the holes are used for being connected with chord members (3) or web members (4) through bolt and nut assemblies. The net rack is connected with the rod piece through bolts, the defects of an existing welding ball joint and an existing bolt ball joint net rack are overcome, operation is easy, and on-site assembly type connection of the net rack can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel grid structure construction, in particular to a spherical connection node of the steel grid structure, specifically a bolt-connected hollow spherical node used for the steel grid structure. Background Art

[0002] Traditional grid nodes generally use welded ball nodes or bolted ball nodes. Welded ball node grids need to be welded on site, and the on-site construction period is long; the bolt balls of bolted ball node grids need to be machined by casting machines, and once the bolt ball diameter has a negative tolerance specification that is too small, the milling surface of the bolt hole is greatly reduced, and the effective contact area between the cone head of the compression rod and the milling surface of the bolt ball becomes smaller, which seriously affects the structural force. Summary of the invention

[0003] The purpose of the utility model is to overcome the above defects and to provide a welded hollow spherical node, which is connected to the rod by bolts, thereby avoiding the shortcomings of existing welded spherical nodes and bolted spherical node grids.

[0004] In order to achieve the above object, the utility model is achieved as follows:

[0005] A bolt-connected hollow spherical node for a steel grid structure comprises a basic sphere with a hollow interior, wherein a hole is opened on the surface of the basic sphere, and the hole is used to connect with a chord (3) or a web (4) through a bolt and nut assembly.

[0006] The bolt-connected hollow spherical node for a steel grid structure has a basic sphere in the form of an assembled structure of two halves, comprising a spherical table (1) and a spherical cap (2). The spherical cap (2) is covered on the spherical table (1). When the chord (3) or the web (4) is connected to the basic sphere via a bolt and nut assembly, the bolt and nut assembly is installed via the internal space of the spherical table (1).

[0007] The bolt-connected hollow ball node for a steel grid structure further comprises a support (5), the support (5) being arranged on the top of the ball crown (2); the support (5) comprising a first vertical pipe (51), a first support plate (52) arranged at both ends of the first vertical pipe (51), a stiffening plate (53) and a first sealing plate (8) with a thread hole, the distance of the first sealing plate (8) being greater than the depth of the steel pipe penetrating the ball.

[0008] The bolt-connected hollow ball node for a steel grid structure further comprises a hanging bracket (6), the hanging bracket (6) being arranged at the bottom of the ball table (1), the hanging bracket (6) comprising a second vertical pipe (61), a second supporting plate (62) arranged at both ends of the second vertical pipe (61), and a second sealing plate (8') with a thread hole, wherein the distance of the second sealing plate (8') is greater than the depth of the steel pipe penetrating the ball.

[0009] The bolt-connected hollow ball node for a steel grid structure is characterized in that the ball table (1) and the ball crown (2) constituting the basic sphere are plug-connected, a limiting column (12) is provided on the top edge of the ball table (1), and a single-side open arc-shaped limiting groove (22) is provided on the inner side of the bottom of the ball crown (2), and the ball table (1) and the ball crown (2) are connected or separated by sliding the limiting column (12) in the arc-shaped limiting groove (22).

[0010] The utility model proposes a hollow ball node connected by a truss bolt, which adopts a welded hollow ball node, which is cut open at about three-fifths of the radius to form a ball table and a ball crown. Holes are drilled on the wall of the ball table according to the installation angle of the truss rod, and holes are also drilled just above the ball crown for connecting a support or a hanging bracket. A sealing plate with a threaded hole is welded to the end of the rod, and the bolts are screwed to the rod in the ball table. A sealing plate with a threaded hole is also welded to the end of the support and the hanging bracket, and the bolts are screwed to the rod in the ball crown. A rotating buckle is set between the ball crown and the ball table, and a sealing gasket is set. After all the bolts are tightened, the rotating ball crown is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 1 ——Upper chord node.

[0012] Figure 2 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 2 ——Lower chord node.

[0013] Figure 3 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 3 ——Billiard table and ball crown.

[0014] Figure 4 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 4 ——Rods with sealing plates and bolts with washers.

[0015] Figure 5 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 5 ——Support and hanging support.

[0016] Figure 6 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 6 ——Assembly of spherical crown node and rod.

[0017] Figure 7 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 7 ——The spherical crown is assembled with the upper chord node spherical table, and the spherical crown rotates and is fixed with the spherical table.

[0018] Figure 8 Schematic diagram of the hollow ball node connected by bolts in the grid shown in the utility model Figure 8 ——The spherical crown is assembled with the ball table at the lower chord node, and the spherical crown rotates and is fixed with the ball table. DETAILED DESCRIPTION

[0019] The present invention is further described below through specific embodiments.

[0020] like Figures 1 to 8 As shown, a bolt-connected hollow spherical node for a steel grid structure comprises a basic sphere with a hollow interior, an anti-rust coating is applied to the interior of the basic sphere, and holes are opened on the surface of the basic sphere. The holes are used to connect to a chord (3) or a web (4) through a bolt and nut assembly.

[0021] The bolt-connected hollow spherical node for a steel grid structure has a basic sphere in the form of an assembled structure of two halves, comprising a spherical table (1) and a spherical cap (2). The spherical cap (2) is covered on the spherical table (1). When the chord (3) or the web (4) is connected to the basic sphere via a bolt and nut assembly, the bolt and nut assembly is installed via the internal space of the spherical table (1).

[0022] In the bolt-connected hollow spherical node for a steel grid structure, a third sealing plate (8'') with thread holes is welded to both ends of the chord (3) and the web (4), and the distance between the third sealing plate (8'') is greater than the depth of the steel pipe penetrating the spherical ball.

[0023] The bolt-connected hollow ball node for the steel grid structure comprises a bolt and a nut assembly comprising a connecting bolt (7) with a washer (71), wherein the contact surface between the washer (71) and the inner wall of the ball table (1) or the ball crown (2) is arc-shaped and matches the arc of the inner wall.

[0024] The bolt-connected hollow spherical node for a steel grid structure further comprises a support (5), the support (5) being arranged on the top of the spherical crown (2); the support (5) comprising a first vertical pipe (51), a first support plate (52) arranged at both ends of the first vertical pipe (51), a stiffening plate (53) and a first sealing plate (8) with a thread hole, the distance of the first sealing plate (8) being greater than the depth of the steel pipe penetrating the spherical ball.

[0025] The bolt-connected hollow ball node for a steel grid structure further comprises a hanging bracket (6), the hanging bracket (6) being arranged at the bottom of the ball table (1), the hanging bracket (6) comprising a second vertical pipe (61), a second support plate (62) arranged at both ends of the second vertical pipe (61), and a second sealing plate (8') with a thread hole, wherein the distance of the second sealing plate (8') is greater than the depth of the steel pipe penetrating the ball.

[0026] The bolt-connected hollow ball node for the steel grid structure is plug-connected between the ball table (1) and the ball crown (2) constituting the basic sphere, a limiting column (12) is provided on the top edge of the ball table (1), and a single-side open arc-shaped limiting groove (22) is provided on the inner side of the bottom of the ball crown (2), and the ball table (1) and the ball crown (2) are connected or separated by sliding the limiting column (12) in the arc-shaped limiting groove (22).

[0027] The method for using the bolt-connected hollow spherical node for a steel grid structure includes:

[0028] Step 1. 1. The ball table (1) is connected and fixed to the chord rod (3) and the belly rod (4) by bolts (7), and tightened with a special wrench. The support (5) is connected and fixed to the ball crown of the upper chord ball (2) by bolts (7). The hanging bracket (6) is connected and fixed to the ball crown of the lower chord ball (2) by bolts (7).

[0029] Step 2: A sealing gasket (9) is arranged on the ball table (1) of the upper string ball, the ball crown (2) with the support (5) is rotated and fixed on the ball table (1), and the L-shaped arc stopper (22) is fixedly engaged with the limit pile (12).

[0030] Step 3: A sealing gasket (9) is arranged on the ball crown (2) with the hanging bracket (6), and is rotatably fixed to the ball table (1), and the L-shaped arc stopper (22) is fixedly engaged with the limit pile (12).

[0031] It can be seen from the above embodiments that the bolt-connected hollow ball node proposed by the utility model can realize assembly construction at the construction site, without welding work on site, and the construction speed is fast. The sealing plate welded at the end of the rod has a thread hole and does not penetrate, which can ensure that the inner wall of the rod does not enter the air. The contact surface between the end of the rod and the ball node is large, which can ensure that the force requirements are met when the rod is under pressure. The ball crown and the ball table are detachable, which is convenient for later inspection and maintenance.

Claims

1. A bolt-connected hollow spherical node for a steel grid structure, comprising a basic sphere with a hollow interior, the basic sphere having a hole on its surface, the hole being used to connect to a chord (3) or a web (4) through a bolt and nut assembly; wherein: The basic sphere is an assembled structure of two halves, comprising a sphere table (1) and a sphere cap (2). The sphere cap (2) is covered on the sphere table (1). When the chord (3) or the web (4) is connected to the basic sphere via a bolt and nut assembly, the bolt and nut assembly is installed via the internal space of the sphere table (1).

2. The bolt-connected hollow spherical node for a steel grid structure according to claim 1 is characterized in that: It also includes a support (5), which is arranged on the top of the ball crown (2); the support (5) includes a first vertical pipe (51), a first support plate (52) arranged at both ends of the first vertical pipe (51), a stiffening plate (53) and a first sealing plate (8) with a thread hole, and the distance of the first sealing plate (8) is greater than the depth of the steel pipe penetrating the ball.

3. The bolt-connected hollow spherical node for a steel grid structure according to claim 1 is characterized in that: The device also comprises a hanging bracket (6), which is arranged at the bottom of the ball table (1), and comprises a second vertical pipe (61), a second support plate (62) arranged at both ends of the second vertical pipe (61), and a second sealing plate (8') with a thread hole, wherein the distance of the second sealing plate (8') is greater than the ball penetration depth of the steel pipe.

4. The bolt-connected hollow spherical node for a steel grid structure according to claim 1 is characterized in that: The ball table (1) and the ball crown (2) constituting the basic sphere are plug-connected, a limiting column (12) is arranged on the top edge of the ball table (1), and an arc-shaped limiting groove (22) with a single-side opening is arranged on the inner side of the bottom of the ball crown (2), and the ball table (1) and the ball crown (2) are connected or separated by sliding the limiting column (12) in the arc-shaped limiting groove (22).

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