CN107620501A - A kind of assembling type node applied to double-deck steel structure cooling tower - Google Patents

Abstract

An assembled joint applied to a double-layer steel structure cooling tower relates to an assembled joint. The invention solves the problems of difficult construction and poor quality of welded joints of the existing steel cooling towers and too low bearing capacity of assembled bolt ball joints. One side of the rectangular sealing plate is welded on the end of the ring chord in the node area, and a lap assembly is welded on the other side of the rectangular sealing plate; the side ear plate is welded on the inside of the node area of the ring chord node assembly, and the circular sealing One side of the plate is welded at the end of the oblique web in the node area, and the upper and lower ear plates are welded on the other side of the circular sealing plate; the side ear plates are located between the upper and lower ear plates and pass through High-strength bolts are fastened; bolt connection through holes are processed on the connecting components, and the overlapping components of the vertical chord node components and the lap joint components of the ring chord node components are connected through the connector components and multiple high-strength bolts. The invention is applied to a double-layer steel structure cooling tower.

Description

A prefabricated joint applied to a double-layer steel structure cooling tower

technical field

The invention relates to an assembled node applied to a double-layer steel structure cooling tower, belonging to the technical field of building steel structures.

Background technique

At present, most of the natural ventilation hyperbolic cooling towers adopt traditional reinforced concrete structures. In recent years, with the vigorous promotion of national construction industrialization and the superior structural performance of steel structures with high strength and light weight, steel structure cooling towers have become more and more popular. . However, there are many problems in the joint construction of steel cooling towers. The use of welded rigid joints makes high-altitude welding construction difficult and the quality is difficult to guarantee; the use of assembled bolt ball joints has a low stable bearing capacity of the structure. In addition, the stable bearing capacity and rigidity of the double-layer steel cooling tower rods are large, the force is uniform and mainly in tension and compression, and it is suitable for semi-rigid assembly nodes.

In summary, the steel cooling tower welded joints are difficult to construct and of poor quality; the bearing capacity of the assembled bolt ball joints is too low.

Contents of the invention

In order to solve the problems of difficult construction, poor quality and low bearing capacity of assembled bolt ball joints of steel cooling tower welding joints, the invention further provides an assembled joint applied to double-layer steel structure cooling towers.

The technical scheme that the present invention takes for solving the problems of the technologies described above is:

An assembled node applied to a double-layer steel structure cooling tower of the present invention includes a vertical chord node assembly 1, two ring chord node assemblies 2, two oblique web node assemblies 3 and two connecting assemblies 4. The vertical chord node assembly 1 includes a vertical chord 6 in the node area, a radial web 7 in the node area, and two overlapping assemblies 8; each overlapping assembly 8 includes a rib plate 9 and a left flange plate 10 and the right flange plate 11; the left flange plate 10 and the right flange plate 11 are welded on the left and right sides of the rib plate 10, and the two overlapping components 8 are symmetrically welded on both sides of the vertical chord bar 6 in the node area, and the vertical chord bar in the node area The middle part of the rod 6 is horizontally welded with a node area radial web rod 7;

The hoop chord node assembly 2 includes a hoop chord 12 in the nodal area, a rectangular sealing plate 13 and an overlapping assembly 8, one side of the rectangular sealing plate 13 is welded to the end of the hoop chord 12 in the nodal area, and the rectangular sealing The other side of the plate 13 is welded with a lap assembly 8;

The oblique web node assembly 3 includes an oblique web member 22 in the node area, a circular sealing plate 14, an upper ear plate 15, a lower ear plate 16 and a side ear plate 17; the side ear plate 17 is welded to the ring chord node assembly 2 The inner side of the node area, one side of the circular sealing plate 14 is welded on the end of the node area obliquely to the web bar 22, and the other side of the circular sealing plate 14 is welded with the upper ear plate 15 and the lower ear plate 16; The plate 17 is located between the upper ear plate 15 and the lower ear plate 16 and is fastened by high-strength bolts 5;

The connector assembly 4 includes an upper connection plate 18, a lower connection plate 19, a left connection plate 20 and a right connection plate 21; the connection assembly 4 is processed with bolt connection through holes, and the lap assembly 8 of the vertical chord node assembly 1 The lap assembly 8 is connected with the hoop chord node assembly 2 through the connector assembly 4 and a plurality of high-strength bolts 5 .

Further, the vertical chord 6 in the node area is a rectangular square steel pipe, and the radial web 7 in the node area is a circular steel pipe.

Further, the circumferential chord 12 in the node area is a rectangular square steel pipe, and the oblique web bar 22 in the node area is a circular steel pipe.

Further, the upper ear plate 15 and the lower ear plate 16 are arranged symmetrically with respect to the horizontal centerline of the circular sealing plate 14 .

Further, the rib plate 9 , the left flange plate 10 and the right flange plate 11 are arranged in a cross shape, and the rib plate 9 , the left flange plate 10 and the right flange plate 11 are processed with bolt connection through holes corresponding to the connector assembly 4 .

Further, when the vertical chord node assembly 1 and the hoop chord node assembly 2 are assembled together by using the connector assembly 4 and a plurality of high-strength bolts 5, the upper connecting plate 18 is fixedly connected to the upper part of the rib plate 9, and the lower connecting plate 18 is fixedly connected to the upper part of the rib 9. The plate 19 is fixedly connected to the lower part of the rib plate 9 , the left connecting plate 20 is fixedly connected to the left flange plate 10 , and the right connecting plate 21 is fixedly connected to the right flange plate 11 .

Compared with the prior art, the present invention has the following beneficial effects:

1. All accessories of the node of the present invention are prefabricated in the factory, and only need to assemble and connect each node area on site, so the construction speed is fast and the construction quality can be guaranteed;

2. The chords are spliced by multiple pairs of connecting plates and connected by multiple pairs of high-strength bolts. The force distribution in the node area is uniform, the node stiffness is high, and the safety reserve is large, which can meet the needs of the structural bearing capacity;

3. The present invention has simple structure and convenient construction, and is a semi-rigid assembled node suitable for super-large double-layer steel structure cooling towers.

Description of drawings

Fig. 1 is the overall structure perspective view of the assembled node that is applied to double-deck steel structure cooling tower of the present invention;

Fig. 2 is a perspective view of the vertical chord node assembly 1 in Embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the connection between the hoop chord node assembly 2 and the oblique web node assembly 3 in a specific embodiment of the present invention;

Fig. 4 is a schematic diagram of the connection between the connector component 4 and the lap joint component 8 in Embodiment 4 of the present invention.

detailed description

Specific Embodiment 1: As shown in Figures 1-4, the assembled nodes applied to double-layer steel structure cooling towers in this embodiment include a vertical chord node assembly 1, two ring chord node assemblies 2, two The oblique web node assembly 3 and two connecting assemblies 4; the vertical chord node assembly 1 includes a node area vertical chord 6, a node area radial web 7 and two lap assemblies 8; each lap The joint assembly 8 includes a rib plate 9, a left flange plate 10 and a right flange plate 11; the left flange plate 10 and the right flange plate 11 are welded on the left and right sides of the rib plate 10, and the two lap joint assemblies 8 are welded symmetrically in the vertical joint area. On both sides of the chord 6, the middle part of the vertical chord 6 in the node area is horizontally welded with a radial web 7 in the node area;

The hoop chord node assembly 2 includes a hoop chord 12 in the nodal area, a rectangular sealing plate 13 and an overlapping assembly 8, one side of the rectangular sealing plate 13 is welded to the end of the hoop chord 12 in the nodal area, and the rectangular sealing The other side of the plate 13 is welded with a lap assembly 8;

The oblique web node assembly 3 includes an oblique web member 22 in the node area, a circular sealing plate 14, an upper ear plate 15, a lower ear plate 16 and a side ear plate 17; the side ear plate 17 is welded to the ring chord node assembly 2 The inner side of the node area, one side of the circular sealing plate 14 is welded on the end of the node area obliquely to the web bar 22, and the other side of the circular sealing plate 14 is welded with the upper ear plate 15 and the lower ear plate 16; The plate 17 is located between the upper ear plate 15 and the lower ear plate 16 and is fastened by high-strength bolts 5;

The connector assembly 4 includes an upper connection plate 18, a lower connection plate 19, a left connection plate 20 and a right connection plate 21; the connection assembly 4 is processed with bolt connection through holes, and the lap assembly 8 of the vertical chord node assembly 1 The lap assembly 8 is connected with the hoop chord node assembly 2 through the connector assembly 4 and a plurality of high-strength bolts 5 . Thus, the vertical chord node assembly 1 and the hoop chord node assembly 2 are assembled into one body.

Embodiment 2: As shown in Figure 1 and Figure 2, the vertical chord 6 in the node area of this embodiment is a rectangular square steel pipe, and the radial web bar 7 in the node area is a circular steel pipe. In such a design, the vertical chord 6 in the node area is subjected to both bending moment and axial force, and the radial web 7 in the node area is only subjected to axial force, so rectangular square steel pipes and round steel pipes are used respectively. Other components and connections are the same as those in the first embodiment.

Embodiment 3: As shown in Fig. 1 and Fig. 3, in this embodiment, the circumferential chord 12 in the node area is a rectangular square steel pipe, and the oblique web bar 22 in the node area is a circular steel pipe. In such a design, the hoop chord 12 in the node area is subjected to both bending moment and axial force, and the oblique web 22 in the node area is only subjected to axial force, so rectangular square steel pipes and round steel pipes are used respectively. Other compositions and connections are the same as those in Embodiment 1 or 2.

Embodiment 4: As shown in FIG. 3 , in this embodiment, the upper ear plate 15 and the lower ear plate 16 are arranged symmetrically with respect to the horizontal center line of the circular sealing plate 14 . Such a design can reduce the eccentricity of the axial force of the web, so that the web basically only bears the axial force. Other components and connections are the same as those in the third embodiment.

Specific embodiment five: as shown in Figure 1 and Figure 4, the rib plate 9, the left flange plate 10 and the right flange plate 11 of this embodiment are arranged in a cross shape, and the rib plate 9, the left flange plate 10 and the right flange plate 11 are connected with The component assembly 4 is correspondingly processed with bolt connection through holes. With such a design, all the accessories of the nodes are prefabricated in the factory, and only the assembly and connection of each node area is required on site. The construction speed is fast and the construction quality can be guaranteed. Other compositions and connections are the same as those in Embodiment 1, 2 or 4.

Specific embodiment six: as shown in Figure 1 and Figure 4, when the vertical chord node assembly 1 and the ring chord node assembly 2 are assembled into one body using the connector assembly 4 and a plurality of high-strength bolts 5 in this embodiment, the upper The connecting plate 18 is fixedly connected to the top of the rib plate 9, the lower connecting plate 19 is fixedly connected to the bottom of the rib plate 9, the left connecting plate 20 is fixedly connected to the left flange plate 10, and the right connecting plate 21 is fixedly connected to the right flange plate 11. Such a design facilitates the assembly and connection of each node area. Other compositions and connections are the same as those in Embodiment 5.

Claims (6)

1. A prefabricated node applied to a double-layer steel structure cooling tower, said prefabricated node comprising a vertical chord node assembly (1), two ring chord node assemblies (2), two oblique webs A rod node assembly (3) and two connecting assemblies (4); it is characterized in that: the vertical chord node assembly (1) includes a node area vertical chord (6), a node area radial web (7) and two lap assemblies (8); each lap assembly (8) includes a rib (9), a left flange (10) and a right flange (11); a left flange (10) and a right flange ( 11) Welded on the left and right sides of the floor plate (10), two overlapping components (8) are symmetrically welded on both sides of the vertical chord (6) in the node area, and the middle part of the vertical chord (6) in the node area is horizontal Welded radial webs (7) in the node area; The hoop chord node assembly (2) includes a nodal area hoop chord (12), a rectangular sealing plate (13) and an overlapping component (8), and one side of the rectangular sealing plate (13) is welded on the nodal area ring To the end of the chord (12), a lap assembly (8) is welded to the other side of the rectangular sealing plate (13); The oblique web node assembly (3) includes a node area oblique web (22), a circular sealing plate (14), an upper ear plate (15), a lower ear plate (16) and a side ear plate (17); The side ear plate (17) is welded on the inner side of the node area of the ring chord node assembly (2), and one side of the circular sealing plate (14) is welded on the end of the oblique web member (22) in the node area, and the circular sealing plate The other side of (14) is welded with upper ear plate (15) and lower ear plate (16) up and down correspondingly; Side ear plate (17) is located between upper ear plate (15) and lower ear plate (16) and is passed high-strength bolt (5) Fixed connection; The connector assembly (4) includes an upper connection plate (18), a lower connection plate (19), a left connection plate (20) and a right connection plate (21); the connection assembly (4) is processed with bolt connection through holes, The lap joint assembly (8) of the vertical chord node assembly (1) is connected with the lap joint assembly (8) of the ring chord node assembly (2) through a connector assembly (4) and a plurality of high-strength bolts (5). 2. A prefabricated node applied to a double-layer steel structure cooling tower according to claim 1, characterized in that: the vertical chord (6) in the node area is a rectangular square steel pipe, and the radial web (7) in the node area ) is a circular steel pipe. 3. A prefabricated node applied to a double-layer steel structure cooling tower according to claim 1 or 2, characterized in that: the ring chord (12) in the node area is a rectangular square steel pipe, and the oblique web bar in the node area (22) is circular steel pipe. 4. A prefabricated node applied to double-layer steel structure cooling towers according to claim 3, characterized in that: the upper ear plate (15) and the lower ear plate (16) are about the circular sealing plate (14) The horizontal centerline is set symmetrically. 5. A prefabricated node applied to double-layer steel structure cooling towers according to claim 1, 2 or 4, characterized in that: the rib plate (9), the left flange plate (10) and the right flange plate (11 ) is arranged in a cross shape, and the rib plate (9), the left flange plate (10) and the right flange plate (11) and the connector assembly (4) are correspondingly processed with bolt connection through holes. 6. A prefabricated node applied to a double-layer steel structure cooling tower according to claim 5, characterized in that: the vertical chord node assembly is connected by a connector assembly (4) and a plurality of high-strength bolts (5) (1) When assembled with the ring chord node assembly (2), the upper connecting plate (18) is fixedly connected with the upper part of the rib (9), and the lower connecting plate (19) is fixed with the lower part of the rib (9) Connection, the left connecting plate (20) is fixedly connected with the left flange plate (10), and the right connecting plate (21) is fixedly connected with the right flange plate (11).