Boiler steel frame structure with overhung steam drum

Abstract

The invention belongs to the technical field of boiler steel structures, particularly relates to a boiler steel frame structure with an externally-suspended steam drum, and aims at solving the problems that when the ground site space is limited, arrangement of a boiler steel frame column net is limited, and a boiler steam drum cannot be arranged in the range of the boiler column net in a traditional mode. The scheme comprises a horizontal truss, a large plate girder, two boiler steel columns and two steam pocket supporting beams, the two steam drum supporting beams are transversely arranged, the front portions of the two steam drum supporting beams are connected through a horizontal truss, the rear portions of the two steam drum supporting beams are connected through a large plate beam, the lower left end and the lower right end of the horizontal truss are each fixedly provided with a boiler steel column, the boiler steel columns are further connected with the steam drum supporting beams, and each steam drum supporting beam is provided with two vertical through holes. According to the scheme, boiler steel frames are reasonably arranged under the condition that the site space is limited to achieve supporting and hoisting of the steam pocket.

Description

Technical Field

[0001] This invention belongs to the field of boiler steel structure technology, and particularly relates to a boiler steel frame structure with the steam drum externally suspended, which is a boiler steel frame form that is compact in ground space and realizes the support and suspension of the steam drum. Background Technology

[0002] With the continuous growth of electricity demand, the number of newly built coal-fired power plants and power plant expansion projects is increasing year by year. Among them, some power plants in the expansion projects have limited site space for new units due to the existence of existing units. Because the steam drum load is large, the traditional boiler steam drum is arranged within the column grid. The beams bearing the steam drum load are simply supported at both ends, and the load is ultimately transferred to the columns through the plate beams, and then to the foundation through the columns. When the ground space is limited, the layout of the boiler steel frame column grid is restricted, and the boiler steam drum cannot be arranged within the boiler column grid in the traditional way. Summary of the Invention

[0003] The purpose of this invention is to address the problem that when ground space is limited, the boiler steel frame column grid layout is restricted, and the boiler drum cannot be arranged within the boiler column grid in the traditional manner. This invention proposes a boiler steel frame structure with the boiler drum suspended externally.

[0004] The objective of this invention is achieved as follows: a boiler steel frame structure with an externally suspended steam drum, comprising a horizontal truss, a large plate beam, two boiler steel columns, and two steam drum support beams;

[0005] Both steam drum support beams are arranged horizontally. The front of the two steam drum support beams are connected by a horizontal truss, and the rear of the two steam drum support beams are connected by a large plate beam. A boiler steel column is fixed at the lower left and lower right ends of the horizontal truss. The boiler steel column is also connected to the steam drum support beam. Each steam drum support beam is provided with two vertical through holes.

[0006] Furthermore, the two steam drum support beams are parallel and symmetrical.

[0007] Furthermore, the horizontal truss is located between the two steam drum support beams.

[0008] Furthermore, the large plate girder is located at the rear of the two steam drum support beams.

[0009] Furthermore, the two steam drum support beams are symmetrically fixed on the large plate beam.

[0010] Furthermore, the top of the boiler steel column and the steam drum support beam are connected by high-strength bolts.

[0011] Furthermore, a column head plate is provided at the top of the boiler steel column, and the column head plate and the steam drum support beam are connected by high-strength bolts.

[0012] Furthermore, the boiler steel column sidewalls and the steam drum support beams are connected by diagonal bracing.

[0013] Furthermore, the diagonal bracing is a box-shaped structure.

[0014] Furthermore, the length of the drum support beam on the left side of the boiler steel column is less than the length of the drum support beam on the right side of the boiler steel column.

[0015] Beneficial effects:

[0016] This design proposes a novel boiler drum support system. The drum support beam is cantilevered, and the position of the boiler steel column is adjusted so that the beam bearing the drum load acts directly on the top of the boiler steel column. The main load of the drum is directly transferred to the foundation through the top of the steel column. A set of horizontal trusses is arranged to ensure the overall stability of the drum support beam. This design achieves the support of the drum by rationally arranging the boiler steel frame under limited site space. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a boiler steel frame structure with an externally suspended steam drum according to the present invention.

[0018] Figure 2 yes Figure 1 A schematic diagram of direction AA.

[0019] In the diagram: 1-Boiler steel column; 2-Horizontal truss; 3-Large plate beam; 4-Steam drum support beam; 5-Diagonal brace; 6-High-strength bolt; 7-Steam drum hanger; 8-Steam drum. Detailed Implementation

[0020] Specific implementation method one: A boiler steel frame structure with externally suspended steam drum, which includes a horizontal truss 2, a large plate beam 3, two boiler steel columns 1, and two steam drum support beams 4;

[0021] Both steam drum support beams 4 are arranged horizontally. The front of the two steam drum support beams 4 is connected by a horizontal truss 2, and the rear of the two steam drum support beams 4 is connected by a large plate beam 3. A boiler steel column 1 is fixed at the lower left and lower right ends of the horizontal truss 2. The boiler steel column 1 is also connected to the steam drum support beams 4. Each steam drum support beam 4 is provided with two vertical through holes.

[0022] In this embodiment: the steam drum is placed outside the boiler column grid. The steam drum is suspended from the steam drum support beam by steam drum hangers. A through hole in the steam drum support beam allows the steam drum hangers to pass through. A nut with threaded engagement can be installed at the top of the steam drum hangers to limit the position of the hangers and the steam drum support beam. The steam drum support beam is designed as a cantilever structure. The position of the first row of boiler steel columns is adjusted according to the steam drum suspension. The steam drum support beam is placed on top of the boiler steel columns, with one side cantilevered and the other side connected to a large plate beam. A horizontal truss is used to address the overall structural stability.

[0023] Specific implementation method 2: A boiler steel frame structure with the steam drum externally suspended, wherein the two steam drum support beams 4 are parallel and symmetrical.

[0024] Other implementation methods are the same as those in Specific Implementation Method 1.

[0025] Specific implementation method three: A boiler steel frame structure with the steam drum externally suspended, wherein the horizontal truss 2 is located between two steam drum support beams 4.

[0026] Other implementation methods are the same as those in Specific Implementation Method 1.

[0027] Specific implementation method four: A boiler steel frame structure with externally suspended steam drum, wherein the large plate beam 3 is located at the rear of the two steam drum support beams 4.

[0028] Other implementation methods are the same as those in Specific Implementation Method 1.

[0029] Specific implementation method five: A boiler steel frame structure with the steam drum externally suspended, wherein two steam drum support beams 4 are symmetrically fixed on the large plate beam 3.

[0030] Other implementation methods are the same as those in Specific Implementation Method 1.

[0031] Specific implementation method six: A boiler steel frame structure with the steam drum externally suspended, wherein the top of the boiler steel column 1 and the steam drum support beam 4 are connected by high-strength bolts 6.

[0032] In this embodiment: the top of the boiler steel column is designed with a column head plate, which is connected to the lower flange of the steam drum support beam by high-strength bolts. The strength of the column head plate and the number of bolts need to meet the stress requirements.

[0033] Other implementation methods are the same as those in Specific Implementation Method 1.

[0034] Specific implementation method seven: A boiler steel frame structure with the steam drum externally suspended, wherein a column head plate is provided at the top of the boiler steel column 1, and the column head plate and the steam drum support beam 4 are connected by high-strength bolts 6.

[0035] In this implementation:

[0036] Other implementation methods are the same as those in Specific Implementation Method Six.

[0037] Specific implementation method eight: A boiler steel frame structure with the steam drum externally suspended, wherein the side wall of the boiler steel column 1 and the steam drum support beam 4 are connected by diagonal bracing 5.

[0038] In this embodiment: to avoid excessive deformation at the cantilever end of the beam, diagonal supports are installed on the boiler steel column sidewall steam drum support beam connection to prevent excessive deformation at the cantilever end of the steam drum support beam.

[0039] Other implementation methods are the same as those in Specific Implementation Method 1.

[0040] Specific implementation method nine: A boiler steel frame structure with externally suspended steam drum, wherein the diagonal support 5 is a box-type structure.

[0041] In this embodiment, the diagonal support is designed as a box-shaped structure so that the steam drum hanger can pass through the diagonal support.

[0042] Other implementation methods are the same as those in Specific Implementation Method 8.

[0043] Specific Implementation Method 10: A boiler steel frame structure with the steam drum externally suspended, wherein the length of the steam drum support beam 4 on the left side of the boiler steel column 1 is less than the length of the steam drum support beam 4 on the right side of the boiler steel column 1.

[0044] In this embodiment: Optionally, the position of the boiler steel column can be adjusted according to the specific working conditions on site, so as to meet the needs of both supporting the steam drum support beam and transmitting load.

[0045] Other implementation methods are the same as those in Specific Implementation Method 1.

[0046] Working principle:

[0047] The steam drum is placed outside the boiler column grid. The steam drum support beam is designed as a cantilever structure. The position of the first row of boiler steel columns is adjusted according to the steam drum suspension. The steam drum support beam is placed on the top of the boiler steel columns. One side of the steam drum support beam is cantilevered, and the other side is connected to the large plate beam. To avoid excessive deformation at the cantilever end of the steam drum support beam, an inclined support is added to the cantilever end. The inclined support is designed as a box structure so that the steam drum hanger can pass through the vertical support. A set of horizontal trusses is designed to solve the overall stability problem of the structure. All members and connection nodes need to meet the stress requirements.

Claims

1. A boiler steel frame structure with the steam drum externally suspended, characterized in that: It includes a horizontal truss (2), a large plate beam (3), two boiler steel columns (1), and two steam drum support beams (4). Both steam drum support beams (4) are arranged horizontally. The front of the two steam drum support beams (4) is connected by a horizontal truss (2), and the rear of the two steam drum support beams (4) is connected by a large plate beam (3). A boiler steel column (1) is fixed at the lower left and lower right ends of the horizontal truss (2). The boiler steel column (1) is also connected to the steam drum support beams (4). Each steam drum support beam (4) has two vertical through holes.

2. The boiler steel frame structure with externally suspended steam drum according to claim 1, characterized in that: The two steam drum support beams (4) are parallel and symmetrical.

3. The boiler steel frame structure with externally suspended steam drum according to claim 1, characterized in that: The horizontal truss (2) is located between the two steam drum support beams (4).

4. The boiler steel frame structure with externally suspended steam drum according to claim 1, characterized in that: The large plate beam (3) is located at the rear of the two steam drum support beams (4).

5. The boiler steel frame structure with externally suspended steam drum according to claim 4, characterized in that: Two steam drum support beams (4) are symmetrically fixed on the large plate beam (3).

6. The boiler steel frame structure with externally suspended steam drum according to claim 1, characterized in that: The top of the boiler steel column (1) and the steam drum support beam (4) are connected by high-strength bolts (6).

7. The boiler steel frame structure with externally suspended steam drum according to claim 6, characterized in that: A column head plate is provided on the top of the boiler steel column (1), and the column head plate and the steam drum support beam (4) are connected by high-strength bolts (6).

8. The boiler steel frame structure with externally suspended steam drum according to claim 1, characterized in that: The side wall of the boiler steel column (1) and the steam drum support beam (4) are connected by diagonal bracing (5).

9. A boiler steel frame structure with an externally suspended steam drum according to claim 8, characterized in that: The diagonal support (5) is a box-shaped structure.

10. A boiler steel frame structure with an externally suspended steam drum according to claim 1, characterized in that: The length of the steam drum support beam (4) located on the left side of the boiler steel column (1) is less than the length of the steam drum support beam (4) located on the right side of the boiler steel column (1).

Images