Novel damping type boiler stiffening bar arrangement form

Abstract

The invention provides a novel damping type boiler rigid beam arrangement form, and belongs to the technical field of boiler rigid beams. The problems that due to the fact that the design pressure of the boiler is increased, the section of the rigid beam is larger and larger, space is limited, arrangement difficulty is increased, and meanwhile huge cost pressure is caused to a manufacturing enterprise are solved. The device comprises a supporting beam, a plurality of rigid beam sets and dampers, the rigid beam sets are evenly arranged on the outer side of a hearth in a surrounding mode in the vertical direction, each rigid beam set comprises four rigid beams which are connected end to end, the four rigid beams are horizontally arranged on the outer side of the periphery of the hearth respectively, and the dampers are arranged on the outer side of the hearth. Supporting beams are vertically arranged on the outer side of the periphery of the hearth, the supporting beams are arranged on the outer side of the rigid beam set, the supporting beams are connected with the multiple rigid beams located on the same side of the hearth, and a plurality of dampers are arranged on the outer sides of the supporting beams in the vertical direction. The device is mainly used for arranging the boiler rigid beam.

Description

Technical Field

[0001] The present invention belongs to the technical field of boiler rigid girders, and particularly relates to a new type of damping boiler rigid girder arrangement form. Background Art

[0002] Boiler rigid girders play an important role in boiler components. By reasonably arranging the rigid girders, the boiler expansion center can be determined, the stiffness of the tube wall and the boiler explosion-proof ability can be improved. With the development of boiler technology, the boiler grade has been gradually improved, the furnace size has become larger and larger, and the design pressure has increased, resulting in a larger cross-section of the rigid girders, limited space and increased arrangement difficulty. Since the rigid girders are attached to the tube wall, it also increases the burden on the tube wall and brings huge cost pressure to manufacturing enterprises. Summary of the Invention

[0003] In view of this, the present invention aims to propose a new type of damping boiler rigid girder arrangement form to solve the problems that in the existing boiler, with the increase of the design pressure, the cross-section of the rigid girders becomes larger and larger, the space is limited, the arrangement difficulty increases, and at the same time, it brings huge cost pressure to manufacturing enterprises.

[0004] To achieve the above object, the present invention adopts the following technical solutions: a new type of damping boiler arrangement form, which includes a support beam, a rigid girder group and dampers. The number of the rigid girder groups is multiple, and the multiple rigid girder groups are evenly arranged vertically around the outside of the furnace. The rigid girder group includes four rigid girders connected end to end. The four rigid girders are respectively horizontally arranged on the outside of the four sides of the furnace. Support beams are vertically arranged on the outside of the four sides of the furnace. The support beams are arranged outside the rigid girder group. The support beams are connected to multiple rigid girders on the same side of the furnace. A plurality of dampers are arranged vertically on the outside of the support beams. The outside of the support beams is connected to the steel structure outside the furnace through the dampers.

[0005] Furthermore, one of the multiple rigid girders on the same side of the furnace and the support beam are fixedly connected through an anchor point, and the support beam is movably connected to the other rigid girders on the same side of the furnace through a chuck mechanism.

[0006] Furthermore, the chuck mechanism includes two ear-shaped chucks symmetrically and oppositely arranged. The ear-shaped chuck includes two ear plates, a pressing plate and a sliding plate. The two ear plates are parallel and symmetrically connected to the outside of the rigid girder. A chute is opened at one end of the ear plate. The inner side of the support beam is slidably matched with the chute.

[0007] Furthermore, a pressing plate is connected between the grooves of the two ear plates of the ear-shaped chuck. A sliding plate is arranged on the pressing plate. The sliding plate is slidably matched with the inner side of the support beam.

[0008] Furthermore, a rib plate is arranged between the two ear plates of the ear-shaped chuck.

[0009] Further, a corner rotation mechanism is provided between two adjacent rigid beams of the rigid beam group. The corner rotation mechanism is connected to the four corners of the furnace, and the end of the rigid beam is rotatably connected to the corner rotation mechanism.

[0010] Further, the number of support beams on one side of the furnace is two.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a new type of damped boiler layout form. A plurality of support beams are arranged outside the horizontal rigid beam as the fulcrums of the horizontal rigid beam to disperse the load-bearing state of the horizontal rigid beam. The support beam and the steel structure are connected by dampers. When the boiler expands due to heat, the dampers stretch or compress to ensure smooth expansion of the furnace. When the furnace pressure surges suddenly, the dampers present rigid support to provide a fulcrum for the furnace tube wall of the boiler, so as to reduce the cross-section of the rigid beam, reduce the space constraint, and save steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0013] Figure 1 is the main view schematic diagram of the structure of a new type of damped boiler layout form described in the present invention;

[0014] Figure 2 is Figure 1 the cross-sectional view at A-A in

[0015] Figure 3 is Figure 2 the enlarged view of the structure at I in

[0016] Figure 4 is Figure 3 the cross-sectional view at B-B in

[0017] Figure 5 is the top view schematic diagram of the ear-shaped chuck of a new type of damped boiler layout form described in the present invention.

[0018] 1 - Rigid beam, 2 - Support beam, 3 - Damper, 4 - Outer furnace steel structure, 5 - Ear plate, 6 - Rib plate, 7 - Pressure plate, 8 - Sliding plate, 9 - Anchor point. DETAILED DESCRIPTION OF THE INVENTION

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Refer to Figures 1-5 In this embodiment, a new type of damped boiler layout form is described. It includes a support beam 2, a rigid beam group, and a damper 3. The number of the rigid beam groups is multiple, and the multiple rigid beam groups are evenly arranged vertically around the outside of the furnace. The rigid beam group includes four rigid beams 1 connected end to end. The four rigid beams 1 are respectively horizontally arranged on the outside of the four sides of the furnace. Support beams 2 are vertically arranged on the outside of the four sides of the furnace. The support beams 2 are arranged outside the rigid beam group. The support beams 2 are connected to multiple rigid beams 1 on the same side of the furnace. Multiple dampers 3 are vertically arranged on the outside of the support beams 2. The outside of the support beams 2 is connected to the out-of-furnace steel structure 4 through the dampers 3. In this embodiment, support beams 2 are arranged outside the horizontal rigid beams 1 as the fulcrums of the horizontal rigid beams 1 to disperse the load-bearing state of the horizontal rigid beams 1. The support beams 2 and the out-of-furnace steel structure 4 are connected by dampers 3. When the boiler furnace expands due to heat, the dampers 3 stretch or compress to ensure smooth expansion of the furnace. When the furnace pressure surges, the dampers 3 present rigid support to provide a fulcrum for the furnace tube wall of the boiler, so as to reduce the cross-section of the rigid beam 1 and reduce the space constraint, saving steel.

[0021] In this embodiment, the types of the dampers 3 include, but are not limited to, hydraulic dampers. The dampers 3 are selected with appropriate specifications according to the load, and the connection structures at both ends adopt the pin shaft form to meet the rotation requirements.

[0022] In this embodiment, one of the multiple rigid beams 1 on the same side of the furnace and the support beam 2 are fixedly connected through an anchor point 9 for fixing the support beam 2. The support beam 2 and the other rigid beams 1 on the same side of the furnace are movably connected through a chuck mechanism. The chuck mechanism is welded on the horizontal rigid beam 1 to hook the support beam 2 to ensure that the support beam 2 can freely slide in the vertical direction with respect to the horizontal rigid beam 1.

[0023] In this embodiment, the structure of the anchor point 9 can be completed by bolt connection or welding.

[0024] In this embodiment, the chuck mechanism includes two ear-shaped chucks symmetrically and oppositely arranged. Each ear-shaped chuck includes two ear plates 5, a pressing plate 7, and a sliding plate 8. The two ear plates 5 are parallel and symmetrically connected to the outside of the rigid beam 1. One end of each ear plate 5 is provided with a chute, and the inner side of the support beam 2 is slidably engaged with the chute. A pressing plate 7 is connected between the grooves of the two ear plates 5 of the ear-shaped chuck. A sliding plate 8 is arranged on the pressing plate 7, and the sliding plate 8 is slidably engaged with the inner side of the support beam 2. A rib plate 6 is arranged between the two ear plates 5 of the ear-shaped chuck. The ear-shaped chuck is supported by two parallel ear plates 5 with a rib plate 6 at the fixed end and sealed at the chute end by the pressing plate 7. The sliding plate 8 is welded to the outside of the pressing plate 7. The ear-shaped chucks are arranged in pairs to evenly transfer the load to the support beam.

[0025] In this embodiment, a corner rotation mechanism is arranged between two adjacent rigid beams 1 of the rigid beam group. The corner rotation mechanism is connected to the four corners of the furnace. The end of the rigid beam 1 is rotatably connected to the corner rotation mechanism. The corner rotation mechanism can realize the difference in the expansion amount between the furnace tube wall and the rigid beam 1.

[0026] In the novel damping boiler layout form of this embodiment, combined with the intelligent control means of the boiler, the design pressure of the rigid beam is divided into two stages for processing. Taking the boiler trip pressure value as the demarcation point, the pressure situation before the demarcation point is borne by the horizontal rigid beam 1 itself. The horizontal rigid beam 1 is designed as a simply supported beam. When the furnace operating pressure is greater than the demarcation point, the boiler shuts down due to a sudden increase in pressure. The damper 3 is in a rigid state, and the support beam provides a support point for the horizontal rigid beam 1. The horizontal rigid beam 1 can be designed as a continuous beam.

[0027] The number of support beams 2 on one side of the furnace is multiple. In this embodiment, the number of support beams 2 on one side of the furnace is two. The placement position of the support beam 2 can be adjusted adaptively according to actual needs.

[0028] When the furnace operating pressure is less than or equal to the furnace trip pressure value, the maximum moment value between the beams of the horizontal rigid beam occurs at the middle of the beam. At this time, the maximum moment value M max = 0.125qL 2 , where q is the uniformly distributed load on the beam, L is the beam length. Among them, the uniformly distributed load q on the beam = PD, where D is the load span of the rigid beam, and P is the furnace operating pressure. The furnace trip pressure value can be used as the design value for calculating the rigid beam. At this time, the maximum moment value M max = 0.125P1DL 2 .

[0029] When the furnace operating pressure is greater than the furnace trip pressure value, the maximum moment value between the beams of the horizontal rigid beam occurs at the beam support point, that is, the support point of the support beam 2. Taking the horizontal rigid beam as a three-span continuous beam as an example, taking the maximum moment value M at this timemax = 0.0111qL 2 , taking the horizontal rigid beam as an unequal-span three-span beam (when the length of the middle span is equal to twice the length of the side span) as an example, and taking the maximum bending moment value M at this time max = 0.0176qL 2 . The above two are special three-span beam forms, and the actual form of the horizontal rigid beam 1 includes but is not limited to these two forms.

[0030] Through the design method of the rigid beam 1 optimized by the new damping-type boiler layout form described in this embodiment, replacing the design pressure value of the rigid beam 1 with the furnace trip pressure value greatly reduces the design pressure, thereby reducing the cross-section of the rigid beam, saving steel, and reducing costs.

[0031] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well.

Claims

1. A new type of damping boiler layout, characterized in that: It includes a support beam (2), a group of rigid beams, and dampers (3). The number of the group of rigid beams is multiple, and the multiple groups of rigid beams are uniformly arranged around the outside of the furnace in the vertical direction. The group of rigid beams includes four rigid beams (1) connected end to end. The four rigid beams (1) are respectively horizontally arranged on the outside of the four sides of the furnace. Support beams (2) are vertically arranged on the outside of the four sides of the furnace. The support beams (2) are arranged on the outside of the group of rigid beams. The support beams (2) are connected to multiple rigid beams (1) on the same side of the furnace. A plurality of dampers (3) are arranged on the outside of the support beams (2) in the vertical direction. The outside of the support beams (2) is connected to the steel structure outside the furnace (4) through the dampers (3).

2. A novel damping type boiler layout according to claim 1, characterized in that: One of the support beams (2) and multiple rigid beams (1) on the same side of the furnace is fixedly connected through an anchor point (9), and is movably connected to the other rigid beams (1) on the same side of the furnace through a chuck mechanism.

3. A novel damping type boiler layout according to claim 2, characterized in that: The chuck mechanism includes two ear-shaped chucks symmetrically and oppositely arranged. The ear-shaped chuck includes two ear plates (5), a pressing plate (7), and a sliding plate (8). The two ear plates (5) are parallel and symmetrically connected to the outside of the rigid beam (1). A chute is provided at one end of the ear plate (5). The inner side of the support beam (2) is slidably matched with the chute.

4. A novel damped boiler layout according to claim 3, characterized in that: A pressing plate (7) is connected between the grooves of the two ear plates (5) of the ear-shaped chuck. A sliding plate (8) is arranged on the pressing plate (7). The sliding plate (8) is slidably matched with the inner side of the support beam (2).

5. A novel damping type boiler layout according to claim 4, characterized in that: A rib plate (6) is arranged between the two ear plates (5) of the ear-shaped chuck.

6. A novel damped boiler layout according to claim 1, characterized in that: A corner rotation mechanism is arranged between two adjacent rigid beams (1) of the group of rigid beams. The corner rotation mechanism is connected to the four corners of the furnace. The end of the rigid beam (1) is rotatably connected to the corner rotation mechanism.

7. A novel damped boiler layout according to claim 1, characterized in that: The number of support beams (2) on one side of the furnace is two.

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