Arrangement and method for a boiler girder

Abstract

The arrangement structure and method of the new boiler rigid beam. The prior art has the problems of larger section of front and rear wall rigid beams, more difficult spatial arrangement, larger additional load of the rigid beam on the tube wall, and increased burden of the tube wall. The application comprises an angle fixing device (3) and a sliding angle structure (4). The angle fixing device is vertically welded by two long fixed plates (7) and short fixed plates (10) close to the tube wall, and is welded and fixed by a support plate (11) on the outside. The long fixed plate and the short fixed plate are welded with the tube wall through a set of gaskets (6) respectively. Two vertical plates (8) are installed on the two sides of the center line of the rear water cooling wall symmetrically, and the two ends are welded with the inner flange of the rigid beam and the long fixed plate respectively. The two vertical plates are welded by a partition plate (9). The sliding angle structure is installed between the side wall rigid beam (1) and the rear wall rigid beam (5), and is connected by a pin shaft (13). The application is used for the arrangement structure of the new boiler rigid beam.

Description

Technical Field

[0001] This invention relates to the field of boiler equipment technology, and specifically to a boiler rigid beam arrangement structure and arrangement method. Background Technology

[0002] Rigid beams play a crucial role in boiler components. By rationally arranging rigid beams, the boiler expansion center can be determined, the rigidity of the tube walls can be improved, and the boiler's explosion-proof capability can be enhanced. With the development of boiler technology, boiler grades are gradually increasing, and the furnace width is becoming larger and larger. Existing technology has the problem that the cross-section of the rigid beams on the front and rear walls is becoming larger and larger, which limits space and greatly increases the difficulty of arrangement. Since the rigid beams are attached to the tube walls, the additional load on the tube walls increases, adding burden to the tube walls and also bringing huge cost pressure to manufacturing enterprises. Summary of the Invention

[0003] The purpose of this invention is to provide a structure and method for arranging rigid beams in a boiler. This structure and method reduce the cross-section of the rigid beams and decrease spatial constraints while ensuring smooth load transfer and expansion of the boiler, thus effectively saving costs.

[0004] The above objectives are achieved through the following technical solutions: A boiler rigid beam arrangement structure comprises: an angle fixing device and a sliding corner structure. The angle fixing device consists of two long fixing plates and a short fixing plate that are vertically welded to the pipe wall, and a support plate welded to the outside. The long fixing plate and the short fixing plate are respectively welded to the pipe wall through a set of gaskets. Two vertical plates are installed on both sides symmetrically on the center line of the rear water-cooled wall, and their ends are respectively welded to the inner flange of the rigid beam and the long fixing plate. The two vertical plates are welded together by a partition plate. The sliding corner structure is installed between the side wall rigid beam and the rear wall rigid beam and is connected by a pin.

[0005] The arrangement structure of the boiler rigid beam, the sliding corner structure includes a sliding end plate, the sliding end plate has an elongated groove, the pin passes through the elongated groove, the round hole of the side wall rigid beam, and the retaining ring in sequence, and is fixed by a cotter pin.

[0006] The boiler rigid beam arrangement structure includes a rear wall rigid beam connected to a steel structure column via a hook plate, and a set of rigid beam accessories installed between the side wall rigid beam and the pipe wall.

[0007] A boiler rigid beam arrangement structure and method are disclosed. The method includes the following steps: First, the expansion centers of the front and rear walls of the furnace are arranged on the centerline of the furnace, and the expansion centers of the side walls are arranged on the centerline of the rear water-cooled wall. The boiler as a whole expands forward, while the position of the rear water-cooled wall remains stationary. The rigid beam of the rear wall is connected to the steel structure column by hook plates to ensure vertical sliding and constrain lateral displacement. An angle-type fixing device is arranged at the centerline of the rear water-cooled wall of the boiler to determine the front-to-back expansion center of the boiler. The rigid beams of the side walls and the rigid beams of the rear walls are connected by a sliding corner structure to ensure smooth lateral expansion of the water-cooled wall. The angle-type fixing device consists of two fixing plates vertically welded to the pipe wall, with the outer side reinforced by a welded support plate. The fixing plates are welded to the pipe wall through gaskets. The two vertical plates are arranged symmetrically on both sides of the rear water-cooled wall centerline, and their ends are welded to the inner flange of the rigid beam and the fixing plate, respectively. The two vertical plates are reinforced by welded partition plates. The rigid beam is fixed to the rear water centerline; the sliding corner structure consists of round holes in the end plates of the rigid beams on the side walls and waist-shaped holes in the web plates at the ends of the rigid beams on the rear walls, which are combined together in the form of pins. Other corner positions adopt a rotating corner structure. Other force transmission positions between the pipe wall and the rigid beam are completed by the rigid beam accessories. Under the premise of load transmission, the expansion of the pipe wall is allowed to be smooth. At the same time, the corner fixing device is not limited to being arranged on the centerline of the rear water-cooled wall, but can also be arranged on the centerline of the front water-cooled wall, so that the boiler as a whole expands backward relative to the centerline of the front water-cooled wall. Beneficial effects

[0008] 1. This invention relates to a boiler rigid beam arrangement structure and method. The method involves arranging the expansion centers of the front and rear walls of the furnace on the furnace centerline, and the expansion centers of the side walls on the rear water-cooled wall centerline. The boiler as a whole expands forward while the rear water-cooled wall remains stationary. An angle-type fixing device is placed at the centerline of the rear water-cooled wall to determine the front-to-back expansion centers. The rigid beams of the side walls and the rigid beams of the rear walls are connected by a sliding corner structure to ensure smooth lateral expansion of the water-cooled wall. The rigid beams of the rear walls are connected to the steel structure columns by hook plates to ensure vertical sliding while constraining lateral displacement, forming a grid structure with the steel structure. This reduces spatial constraints, decreases the cross-section of the rigid beams, and saves steel while meeting structural performance requirements.

[0009] 2. The sliding corner structure of the present invention consists of a round hole in the end plate of the rigid beam of the side wall and a waist-shaped hole in the web plate of the end of the rigid beam of the rear wall, which are combined together in the form of a pin. Other corner positions adopt a rotating corner structure. Other force transmission positions between the pipe wall and the rigid beam are completed by the rigid beam attachment, ensuring smooth expansion of the pipe wall while ensuring load transmission.

[0010] 3. The arrangement method of the present invention reduces the cross-section of rigid beams, reduces spatial constraints, saves space, facilitates arrangement, and helps reduce production costs, while ensuring smooth boiler load transfer and expansion. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the structure of the present invention.

[0012] Appendix Figure 2 It is attached Figure 1 A sectional view of AA.

[0013] Appendix Figure 3 It is attached Figure 1 A cross-sectional view of BB.

[0014] Appendix Figure 4 It is attached Figure 1 Enlarged view of the middle section (I).

[0015] Appendix Figure 5 It is attached Figure 4 A cross-sectional view of CC.

[0016] 1. Rigid beam of side wall; 2. Rigid beam accessories; 3. Angle fixing device; 4. Sliding corner structure; 5. Rigid beam of rear wall; 6. Pad; 7. Long fixing plate; 8. Vertical plate; 9. Partition plate; 10. Short fixing plate; 11. Support plate; 12. Sliding end plate; 13. Pin shaft; 14. Steel structure column; 15. Hook plate; 16. Cotter pin; 17. Retaining ring. Detailed Implementation

[0017] Example 1

[0018] A boiler rigid beam arrangement structure comprises: an angle fixing device 3 and a sliding corner structure 4. The angle fixing device consists of two long fixing plates 7 and a short fixing plate 10 that are closely attached to the pipe wall and vertically welded together. The outer side is fixed by a support plate 11. The long fixing plate and the short fixing plate are respectively welded to the pipe wall through a set of gaskets 6. Two vertical plates 8 are installed on both sides symmetrically on the center line of the rear water-cooled wall, and their ends are respectively welded to the inner flange of the rigid beam and the long fixing plate. The two vertical plates are welded together by a partition plate 9. The sliding corner structure is installed between the side wall rigid beam 1 and the rear wall rigid beam 5 and is connected by a pin 13.

[0019] Example 2: According to the boiler rigid beam arrangement structure described in Embodiment 1, the novel boiler rigid beam arrangement structure includes a sliding corner structure comprising a sliding end plate 12, the sliding end plate having an elongated groove, the pin passing sequentially through the elongated groove, the round hole of the side wall rigid beam, and the retaining ring 17, and being fixed by a cotter pin 16.

[0020] Example 3: According to the boiler rigid beam arrangement structure described in Embodiment 1, the rear wall rigid beam is connected to the steel structure column 14 by a hook plate 15, and a set of rigid beam accessories 2 is installed between the side wall rigid beam and the pipe wall.

[0021] Example 4: According to the arrangement method of the boiler rigid beam arrangement structure described in Example 1, the method includes the following steps: First, the expansion center of the front and rear walls of the furnace is arranged on the center line of the furnace, and the expansion center of the side wall is arranged on the center line of the rear water-cooled wall. The boiler as a whole expands forward, while the position of the rear water-cooled wall remains unchanged. The rigid beam of the rear wall is connected to the steel structure column by a hook plate to ensure vertical sliding and constrain lateral displacement. An angle fixing device is arranged at the center line of the rear water-cooled wall of the boiler to determine the front and rear expansion center of the boiler. The rigid beam of the side wall and the rigid beam of the rear wall are connected by a sliding corner structure to make the lateral expansion of the water-cooled wall smooth. The angle fixing device consists of two fixing plates that are tightly attached to the pipe wall and vertically welded. The outside is reinforced by welding a support plate. The fixing plate is welded to the pipe wall through a gasket. The two vertical plates are arranged on both sides of the rear water center line symmetrically, and the two ends are welded to the inner flange of the rigid beam and the fixing plate, respectively. The two vertical plates are reinforced by welding a partition plate. The rigid beam of the side wall is fixed to the rear water center line. The sliding corner structure consists of round holes in the end plates of the rigid beams on the side walls and waist-shaped holes in the web plates at the ends of the rigid beams on the rear walls, which are combined together in the form of pins. Other corner positions adopt a rotating corner structure. Other force transmission positions between the pipe wall and the rigid beam are completed by the rigid beam accessories. Under the premise of load transmission, the expansion of the pipe wall is allowed to be smooth. At the same time, the corner fixing device is not limited to being arranged on the center line of the rear water-cooled wall, but can also be arranged on the center line of the front water-cooled wall, so that the boiler as a whole expands backward relative to the center line of the front water-cooled wall.

Claims

1. A method for arranging rigid beams in a boiler, characterized by: Its components include: an angle-type fixing device and a sliding corner structure. The angle-type fixing device consists of two long fixing plates and a short fixing plate vertically welded to the pipe wall, with a support plate welded to the outside. The long fixing plate and the short fixing plate are respectively welded to the pipe wall through a set of gaskets. Two vertical plates are installed on both sides symmetrically on the center line of the rear water-cooled wall, and their ends are respectively welded to the inner flange of the rigid beam and the long fixing plate. A partition plate is welded between the two vertical plates. The sliding corner structure is installed between the rigid beam of the side wall and the rigid beam of the rear wall and connected by a pin. The method includes the following steps: First, the expansion centers of the front and rear walls of the furnace are positioned on the centerline of the furnace, and the expansion centers of the side walls are positioned on the centerline of the rear water-cooled wall. The boiler as a whole expands forward, while the position of the rear water-cooled wall remains stationary. The rigid beam of the rear wall is connected to the steel structure column using hook plates to ensure vertical sliding while restraining lateral displacement. Angle-type fixing devices are positioned on the centerline of the rear water-cooled wall to determine the front-to-back expansion centers of the boiler. The rigid beams of the side walls and the rigid beams of the rear wall are connected using a sliding corner structure to ensure smooth lateral expansion of the water-cooled wall. The angle-type fixing devices consist of two fixing plates vertically welded to the tube wall. The outer side is reinforced by welding of support plates, and the fixed plate is welded to the pipe wall through a gasket. Two vertical plates are arranged symmetrically on both sides of the rear water centerline, and their ends are welded to the inner flange of the rigid beam and the fixed plate, respectively. The two vertical plates are reinforced by welding of partition plates. The rigid beam of the side wall is fixed to the rear water centerline. The sliding corner structure has round holes in the end plate of the rigid beam of the side wall and waist-shaped holes in the web plate of the end of the rigid beam of the rear wall. They are combined together in the form of pins. Other corner positions adopt a rotating corner structure. Other force transmission positions between the pipe wall and the rigid beam are completed by the rigid beam accessories, which ensures smooth expansion of the pipe wall while transmitting load.

2. The arrangement method of the boiler rigid beam arrangement structure according to claim 1, characterized in that: The sliding corner structure includes a sliding end plate with an elongated groove. The pin passes through the elongated groove, the round hole of the rigid beam of the side wall, and the retaining ring in sequence, and is fixed by a cotter pin.

3. The arrangement method of the boiler rigid beam arrangement structure according to claim 2, characterized in that: The rear wall rigid beam is connected to the steel structure column by a hook plate, and a set of rigid beam accessories is installed between the side wall rigid beam and the pipe wall.

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