Connecting structure for tower type boiler and steel structure corridor

Abstract

The invention discloses a connecting structure for a tower-type boiler and a steel structure corridor, and belongs to the field of structural design of tower-type boilers. The problem that the connection mode of a steel structure corridor and a tower type boiler cannot balance the resistance bending moment of outer row steel frame columns and the available space in the boiler is solved. The device comprises a column top cover plate and connecting bolts, outer-row steel frame columns of the tower-type boilers comprise upper steel columns and lower steel columns which are oppositely arranged up and down, insertion openings are formed between the upper steel columns and the lower steel columns, and the two ends of a steel structure corridor penetrate through the insertion openings in the outer-row steel frame columns of the tower-type boilers on the two sides correspondingly and are fixedly connected with inner-row steel frame columns of the tower-type boilers on the two sides; the upper steel column is fixedly connected with the top of the steel structure corridor, and the column top cover plate is installed on the top of the lower steel column and fixedly connected with the bottom of the steel structure corridor through connecting bolts. The connecting structure is mainly used for connecting the tower type boiler and the steel structure corridor, the vertical load of the corridor can be transmitted in the axis direction of the steel frame columns, and the bending moment borne by the steel frame columns is reduced.

Description

Technical Field

[0001] This invention belongs to the field of tower boiler structure design, and particularly relates to a connection structure for tower boilers and steel structure corridors. Background Technology

[0002] In power plants, boilers, as towering structures, are typically difficult to arrange densely due to the influence of their supporting equipment and functional buildings. Traditionally, the steel frame systems of each boiler are set up independently, without connecting passageways at high levels. With the increasing height of boilers, especially tower boilers which can reach approximately 120 meters, this independent arrangement significantly hinders daily inspection and maintenance of multiple boilers. Therefore, it is necessary to construct connecting corridors at high levels to solve the access problem.

[0003] However, as a specialized structure, the boiler steel frame has relatively small cross-sectional dimensions for its outer steel frame columns. If a connecting corridor truss is used, the conventional beam-column hinged joints cannot meet the force transmission requirements due to the large height of the truss cross-section. If designed as a rigid beam-column joint, the connecting corridor truss will transmit a large bending moment to the boiler steel frame columns, thus reducing their stability. Increasing the cross-section of the steel frame columns to resist this bending moment would compress the usable space inside the boiler, affecting equipment layout and operation and maintenance. Summary of the Invention

[0004] In view of this, the present invention provides a connection structure for tower boilers and steel structure corridors, which can transfer the vertical load of the corridor along the axial direction of the steel frame columns, thereby reducing the bending moment on the steel frame columns.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A connection structure for connecting a tower boiler and a steel structure corridor includes a column top cover plate and connecting bolts. The outer row of steel frame columns of the tower boiler includes upper steel columns and lower steel columns arranged opposite each other, with a spigot between the upper and lower steel columns. The two ends of the steel structure corridor pass through the spigots on the outer row of steel frame columns of the two tower boilers respectively, and are fixedly connected to the inner row of steel frame columns of the two tower boilers. The upper steel column is fixedly connected to the top of the steel structure corridor, and the column top cover plate is installed on the top of the lower steel column and fixedly connected to the bottom of the steel structure corridor by connecting bolts.

[0007] Furthermore, the steel structure corridor includes an upper chord beam, a lower chord beam, and truss diagonal bracing. The upper chord beam and the lower chord beam are arranged horizontally relative to each other. Several truss diagonal bracings are provided and are arranged alternately with left and right inclinations along the length direction of the upper chord beam and the lower chord beam. The upper end of the truss diagonal bracing is fixedly connected to the upper chord beam, and the lower end of the truss diagonal bracing is fixedly connected to the lower chord beam.

[0008] Furthermore, a connecting corridor support column is provided between the upper chord beam and the lower chord beam, and the connecting corridor support column is collinear with the upper steel column and the lower steel column.

[0009] Furthermore, the upper and lower chord beams are made of I-beams, and two reinforcing ribs are welded between the upper and lower flanges of the upper and lower chord beams, with these two reinforcing ribs facing the connecting corridor support columns.

[0010] Furthermore, the truss diagonal bracing is connected to the upper and lower chord beams via gusset plates.

[0011] Furthermore, reinforcing ribs are provided between the upper and lower flanges of the upper and lower chord beams and at the positions corresponding to the node plates.

[0012] Furthermore, it also includes gaskets and arc-shaped supports. The gaskets are welded to the bottom of the steel structure corridor, and the arc-shaped supports are welded to the top of the column cap plate and abut against the gaskets.

[0013] Furthermore, the top of the arc-shaped support is an arc-shaped surface. The beneficial effects of this invention compared to the prior art are:

[0014] The beneficial effects of this invention compared to the prior art are:

[0015] 1. This application involves cutting the outer steel frame columns of the existing tower boiler structure to create connecting joints. This allows the steel structure corridor to connect to the inner steel frame columns through the outer steel frame columns. After the steel structure corridor is fixedly connected to the outer steel frame columns, both ends of the corridor are supported by the inner and outer steel frame columns respectively, reducing the tendency for downward bending in the middle. This allows the weight of the steel structure corridor to be vertically transferred through the lower steel columns. Compared to directly connecting the ends of the steel structure corridor to the outer steel frame columns, this reduces the lateral bending moment on the outer steel frame columns without changing the usable space inside the tower boiler, thus ensuring the stability of the tower boiler.

[0016] 2. This application sets up connecting corridor support columns in the steel structure connecting corridor, and sets up reinforcing ribs in the upper and lower chord beams. On the one hand, it can increase the strength of the steel structure connecting corridor; on the other hand, since the outer steel frame column of the tower boiler is cut into upper and lower sections, the weight of the upper steel column presses on the steel structure connecting corridor. By setting connecting corridor support columns and reinforcing ribs at corresponding positions of the upper and lower steel columns, the load of the upper steel column can be effectively transferred to the lower steel column through the connecting corridor support columns, thus avoiding deformation of the steel structure connecting corridor.

[0017] 3. The contact surface between the arc-shaped support and the steel structure corridor in this application adopts an arc-shaped structure, which can automatically adjust the center when under stress, making the pressure distribution more uniform and avoiding local stress concentration caused by installation errors or deformation. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are provided to give a further understanding of the invention.

[0019] Figure 1 This is an assembly drawing of the steel structure connecting corridor and the tower boiler.

[0020] Figure 2 This is a structural diagram of the connection structure used for connecting tower boilers and steel structure corridors.

[0021] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 4 This is an assembly diagram of the connecting bolts, column top cover plate, and lower chord beam.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Column top cover plate; 2. Connecting bolts; 3. Outer row of steel frame columns; 31. Upper steel column; 32. Lower steel column; 4. Inner row of steel frame columns; 5. Steel structure connecting corridor; 51. Upper chord beam; 52. Lower chord beam; 53. Truss diagonal brace; 54. Connecting corridor support column; 55. Reinforcing rib; 56. Node plate; 6. Gasket; 7. Arc-shaped support. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] See Figure 1 and Figure 2 This embodiment provides a connection structure for connecting a tower boiler and a steel structure corridor, including a column top cover plate 1 and connecting bolts 2. The outer steel frame column 3 of the tower boiler includes an upper steel column 31 and a lower steel column 32 arranged opposite to each other. That is, the outer steel frame column 3 of the tower boiler is cut to form an insertion slot between the upper steel column 31 and the lower steel column 32. The two ends of the steel structure corridor 5 pass through the insertion slots on the outer steel frame columns 3 of the two tower boilers respectively and are fixedly connected to the inner steel frame columns 4 of the two tower boilers. The upper steel column 31 is fixedly connected to the top of the steel structure corridor 5, and the column top cover plate 1 is installed on the top of the lower steel column 32 and fixedly connected to the bottom of the steel structure corridor 5 by the connecting bolts 2.

[0027] In this embodiment, the outer steel frame column 3 is cut to form a connecting splice in the original tower boiler structure, allowing the steel structure corridor 5 to pass through the outer steel frame column 3 and connect to the inner steel frame column 4. After the steel structure corridor 5 is fixedly connected to the outer steel frame column 3, both ends of the steel structure corridor 5 are supported by the inner steel frame column 4 and the outer steel frame column 3 respectively, reducing the tendency for downward bending due to gravity in the middle. This allows the weight of the steel structure corridor 5 to be transferred vertically as much as possible through the lower steel column 32. Compared to the steel structure corridor 5 being directly connected to the outer steel frame column 3 at its ends, this reduces the lateral bending moment on the outer steel frame column 3 without changing the usable space inside the tower boiler, ensuring the stability of the tower boiler.

[0028] See Figure 2 The steel structure corridor 5 in this embodiment includes an upper chord beam 51, a lower chord beam 52, and truss diagonal supports 53. The upper chord beam 51 and the lower chord beam 52 are arranged horizontally relative to each other. Several truss diagonal supports 53 are provided and are arranged alternately with left and right inclinations along the length direction of the upper chord beam 51 and the lower chord beam 52. The upper end of the truss diagonal support 53 is fixedly connected to the upper chord beam 51, and the lower end of the truss diagonal support 53 is fixedly connected to the lower chord beam 52.

[0029] A connecting corridor support column 54 is welded between the upper chord beam 51 and the lower chord beam 52. This connecting corridor support column 54 is collinear with the upper steel column 31 and the lower steel column 32, meaning that the top of the connecting corridor support column 54 is directly opposite the upper steel column 31 and the bottom is directly opposite the lower steel column 32. In addition, the upper chord beam 51 and the lower chord beam 52 are made of I-beams, and two reinforcing ribs 55 are welded between the upper and lower flanges of the upper chord beam 51 and the lower chord beam 52. These two reinforcing ribs 55 are directly opposite the connecting corridor support column 54.

[0030] Among them, the truss diagonal brace 53 is connected to the upper chord beam 51 and the lower chord beam 52 through the node plate 56.

[0031] Among them, reinforcing ribs 55 are provided between the upper and lower flanges of the upper chord beam 51 and the lower chord beam 52 and at the position corresponding to the node plate 56.

[0032] In this embodiment, a connecting corridor support column 54 is set inside the steel structure connecting corridor 5, and a reinforcing rib 55 is set inside the upper chord beam 51 and the lower chord beam 52. On the one hand, this can increase the strength of the steel structure connecting corridor 5; on the other hand, since the outer exhaust steel frame column 3 of the tower boiler is cut into upper and lower sections, the weight of the upper steel column 31 presses on the steel structure connecting corridor 5. By setting the connecting corridor support column 54 and the reinforcing rib 55 at the corresponding positions of the upper steel column 31 and the lower steel column 32, the load of the upper steel column 31 can be effectively transferred to the lower steel column 32 through the connecting corridor support column 54, thus avoiding deformation of the steel structure connecting corridor 5.

[0033] See Figure 3The connection structure between the tower boiler and the steel structure corridor 5 in this embodiment also includes a gasket 6 and an arc-shaped support 7. The gasket 6 is welded to the bottom of the lower chord beam 52, and the arc-shaped support 7 is welded to the top of the column top cover plate 1 and abuts against the gasket 6.

[0034] Among them, the top of the arc-shaped support 7 is an arc-shaped surface, and the contact surface between the arc-shaped support and the steel structure corridor 5 adopts an arc-shaped structure. When under stress, it can automatically adjust the center, making the pressure distribution more uniform and avoiding local stress concentration caused by installation errors or deformation.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions created by the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions created by the present invention without departing from the essence and scope of the technical solutions created by the present invention.

Claims

1. A connection structure for connecting a tower boiler and a steel structure corridor, characterized in that, The outer steel frame columns of the tower boiler include upper and lower steel columns arranged opposite each other, with a spigot between them. The two ends of the steel structure corridor pass through the spigots on the outer steel frame columns of the tower boilers on both sides and are fixedly connected to the inner steel frame columns of the tower boilers on both sides. The upper steel column is fixedly connected to the top of the steel structure corridor, and the column top cover is installed on the top of the lower steel column and fixedly connected to the bottom of the steel structure corridor by connecting bolts.

2. The connection structure for a tower boiler and a steel structure corridor according to claim 1, characterized in that, The steel structure connecting corridor includes an upper chord beam, a lower chord beam, and truss diagonal bracing. The upper and lower chord beams are arranged horizontally relative to each other. Several truss diagonal bracings are provided and are arranged alternately with left and right inclinations along the length of the upper and lower chord beams. The upper end of the truss diagonal bracing is fixedly connected to the upper chord beam, and the lower end of the truss diagonal bracing is fixedly connected to the lower chord beam.

3. A connection structure for connecting a tower boiler and a steel structure corridor according to claim 2, characterized in that, A connecting corridor support column is also provided between the upper chord beam and the lower chord beam. This connecting corridor support column is collinear with the upper steel column and the lower steel column.

4. The connection structure for a tower boiler and a steel structure corridor according to claim 3, characterized in that, The upper and lower chord beams are made of I-beams, and two reinforcing ribs are welded between the upper and lower flanges of the upper and lower chord beams, which are directly opposite the supporting columns of the connecting corridor.

5. A connection structure for connecting a tower boiler and a steel structure corridor according to claim 2, characterized in that, The truss diagonal bracing is connected to the upper and lower chord beams via gusset plates.

6. A connection structure for connecting a tower boiler and a steel structure corridor according to claim 5, characterized in that, Reinforcing ribs are provided between the upper and lower flanges of the upper and lower chord beams and at the positions corresponding to the node plates.

7. A connection structure for connecting a tower boiler and a steel structure corridor according to claim 1, characterized in that, It also includes gaskets and curved supports. The gaskets are welded to the bottom of the steel structure corridor, and the curved supports are welded to the top of the column cap plate and abut against the gaskets.

8. A connection structure for a tower boiler and a steel structure corridor according to claim 7, characterized in that, The top of the arc-shaped support is an arc-shaped surface.

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