Fixing and limiting structure for water cooling wall of corner tube boiler

Abstract

The utility model discloses a corner tube boiler water cooling wall fixing and limiting structure and relates to the technical field of boilers. The utility model aims to solve the problem that the existing water cooling wall cannot be effectively positioned in the boiler, so that the water cooling wall shakes in the operation of the boiler, and the heating surface deforms. The device comprises a rigid beam hinge structure, a rear arch hanging structure and a flag type screen positioning structure, the rigid beam hinge structure is arranged in the circumferential direction of a hearth, a water cooling wall is fixedly connected into the hearth through the rigid beam hinge structure, and the rear arch hanging structure is arranged on the rear side of the hearth. The rear arch hanging structure is fixedly connected between an arc plate on a rear arch of the hearth rear water cooling wall and flat steel of the hearth rear water cooling wall, the flag type screen positioning structure is arranged on the flag type convection screen, and the flag type convection screen is fixedly connected to the flat steel of the hearth rear water cooling wall through the flag type screen positioning structure. The fixing device is used for fixing the water cooling wall of the boiler.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a fixed limiting structure of a water-cooled wall of a corner tube boiler. Background Art

[0002] In the prior art, after the corner tube boiler water-cooled wall is assembled, the flat steel welding of the corner water-cooled wall cannot ensure the tight fixation of the entire water-cooled wall. In addition, because the rear arch of the furnace rear water-cooled wall is a bare tube and is a concrete structure near the fuel combustion position, the rear arch of the furnace rear water-cooled wall is suspended after installation. After the flag-type convection screens of the flue rear water-cooled wall are welded to the tube screens, each set of convection screens is fixed only by welding, and after the boiler is installed, the entire water-cooled wall is suspended in the high-temperature zone. Therefore, the corner tube boiler water-cooled wall is not effectively positioned in the furnace. Due to the high temperature and high pressure generated during boiler operation, the water-cooled wall is easily shaken by thermal and mechanical stress during boiler operation, causing deformation of the heating surface. Utility Model Content

[0003] In order to solve the problem that the existing water-cooled wall cannot be effectively positioned in the furnace, resulting in shaking of the water-cooled wall during boiler operation and deformation of the heating surface, the utility model proposes a fixed limiting structure for the water-cooled wall of a corner tube boiler.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A corner tube boiler water-cooled wall fixed limiting structure includes a rigid beam hinge structure, a rear arch hanging structure and a flag screen positioning structure. The rigid beam hinge structure is arranged along the circumferential direction of the furnace, and the water-cooled wall is fixedly connected to the furnace through the rigid beam hinge structure. The rear arch hanging structure is arranged on the rear side of the furnace, and the rear arch hanging structure is fixedly connected between the arc plate on the rear arch of the furnace rear water-cooled wall and the flat steel of the furnace rear water-cooled wall. The flag screen positioning structure is arranged on the flag convection screen, and the flag convection screen is fixedly connected to the flat steel of the furnace rear water-cooled wall through the flag screen positioning structure.

[0006] Furthermore, the rigid beam hinge structure includes a plurality of I-beams, which are arranged in sequence along the circumferential direction of the furnace, and the ends of each two adjacent I-beams are connected by a hinge assembly. The I-beams are arranged horizontally and the cross-section of the I-beams is "H"-shaped. A plurality of support blocks are evenly distributed on the inner end face of the I-beam along the length direction, and the outer end of the support block is slidably connected on the inner end face of the I-beam along the length direction, and the inner end of the support block is fixed to the water-cooled wall flat steel.

[0007] Furthermore, the hinge assembly includes a movable plate and two intermediate hinge plates, the intermediate hinge plates are respectively fixed to the ends of the I-beam, the movable plate is arranged on the inner side of the middle part between the two intermediate hinge plates, and a connecting ear plate is provided between the movable plate and the intermediate hinge plates, and the connecting ear plate is connected to the movable plate and the intermediate hinge plates respectively by a first connecting bolt.

[0008] Furthermore, an end hinge plate is provided on the outer end of the I-beam at the end, the inner end of the end hinge plate is connected to the outer end of the I-beam through a second connecting bolt, and the outer end of the end hinge plate is fixed to the water-cooled wall flat steel.

[0009] Furthermore, two "L"-shaped hanging plates are symmetrically fixed to the outer end of the support block along the height direction, the horizontal end of the "L"-shaped hanging plate is fixed to the support block, the vertical end of the "L"-shaped hanging plate is mounted on the inner end of the I-beam and is respectively arranged on the upper and lower sides of the middle cross beam of the I-beam, and the "L"-shaped hanging plate is slidably connected to the inner end of the I-beam.

[0010] Furthermore, the rear arch hanging structure includes multiple connecting plates, which are arranged in sequence along the width direction of the flat steel of the rear water-cooled wall of the furnace. The lower end of the connecting plate is evenly provided with multiple welding ears along the length direction. The lower end of the welding ear is fixed to the arc plate on the rear arch of the rear water-cooled wall of the furnace. The upper end of the welding ear is fixedly connected to the outer side of the lower part of the connecting plate. The upper end of the connecting plate is evenly provided with multiple suspension rods along the length direction. The lower end of the suspension rod is hoisted and connected to the upper end of the connecting plate. The upper end of the suspension rod is fixed to the flat steel of the rear water-cooled wall of the furnace.

[0011] Furthermore, the lower end of the hanger is fixedly connected to an inverted "U"-shaped hanger, the lower open end of the inverted "U"-shaped hanger is sleeved on the outer side of the upper end of the connecting plate, and the connecting plate and the inverted "U"-shaped hanger are connected by fixing bolts.

[0012] Furthermore, the flag-type screen positioning structure includes an upper positioning flat steel and a lower positioning bracket group. The upper positioning flat steel is arranged along the width direction of the flag-type convection screen and is fixedly connected to the steel plates above the flag-type convection screen respectively. The lower positioning bracket group is arranged below the flag-type convection screen and is fixedly connected to the flat steel of the rear water-cooled wall of the furnace.

[0013] Furthermore, the lower positioning bracket group includes a plurality of lower positioning brackets evenly distributed along the width direction of the flag-type convection screen, the outer vertical side of the lower positioning bracket is fixedly connected to the flat steel of the rear water-cooled wall of the furnace, and the upper horizontal side of the lower positioning bracket is supported below the flag-type convection screen.

[0014] Furthermore, a pad is provided between the lower side of the flag-type convection screen and the upper horizontal side of the lower positioning bracket, and the outer end of the pad is a downward curved surface extending to the outside of the upper horizontal side of the lower positioning bracket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The rigid beam hinge structure in this utility model, through the connection structure of the hinge assembly and the I-beam, can enhance the stability of the entire water-cooled wall and effectively prevent deformation of the heating surface. The rear arch hanging structure of the water-cooled wall behind the furnace can bear the weight of the rear arch and effectively prevent deformation of the furnace rear arch. The rear flue flag screen positioning structure can effectively prevent the flag screen from moving during transportation and prevent deformation of the flag screen during boiler operation. This water-cooled wall fixed position limiting structure has the advantages of simple structure, reliability, low cost, and flexible and easy adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model when used in a corner tube boiler;

[0018] Figure 2 It is a top view schematic diagram of the rigid beam hinge structure in the utility model;

[0019] Figure 3 yes Figure 2 The enlarged view of point I in FIG.

[0020] Figure 4 yes Figure 3 A-direction view in;

[0021] Figure 5 yes Figure 3 B-direction view in;

[0022] Figure 6 yes Figure 2 CC view in the figure;

[0023] Figure 7 This is a schematic diagram of the connection between the outer end of the I-beam 11 at the end and the water-cooled wall flat steel when the rigid beam hinge structure 1 cannot form a complete closed loop structure due to interference with other components in the present invention;

[0024] Figure 8 yes Figure 7 The enlarged view of point II in the figure;

[0025] Figure 9 yes Figure 8 D-direction view in;

[0026] Figure 10 This is a structural diagram of the rear arch hanging structure of the utility model;

[0027] Figure 11 yes Figure 10 G-direction view in;

[0028] Figure 12 This is a structural diagram of the flag-type screen positioning structure of the utility model;

[0029] Figure 13 yes Figure 12 E-direction view in;

[0030] Figure 14 yes Figure 12 The enlarged view of point III in FIG.

[0031] Figure 15 yes Figure 14 F-direction view in. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] Specific implementation method 1: Combination Figures 1 to 15 To explain this embodiment, the present embodiment describes a corner tube boiler water-cooled wall fixed limiting structure including a rigid beam hinge structure 1, a rear arch hanging structure 2 and a flag-type screen positioning structure. The rigid beam hinge structure 1 is arranged along the circumferential direction of the furnace, and the water-cooled wall is fixedly connected to the furnace through the rigid beam hinge structure 1. The rear arch hanging structure 2 is arranged on the rear side of the furnace, and the rear arch hanging structure 2 is fixedly connected between the arc plate on the rear arch of the furnace rear water-cooled wall and the flat steel of the furnace rear water-cooled wall. The flag-type screen positioning structure is arranged on the flag-type convection screen, and the flag-type convection screen is fixedly connected to the flat steel of the furnace rear water-cooled wall through the flag-type screen positioning structure.

[0034] In this embodiment, the rigid beam hinge structure can enhance the stability of the entire water-cooled wall and effectively prevent the deformation of the heated surface; the rear arch hanging structure of the water-cooled wall behind the furnace can bear the weight of the rear arch and effectively prevent the deformation of the rear arch of the furnace; the flag-type screen positioning structure behind the flue can effectively prevent the movement of the flag-type convection screen during transportation, and has the advantage of preventing the flag-type convection screen from deforming when the boiler is running.

[0035] Specific implementation method 2: Combination Figures 1 to 6 This embodiment describes a rigid beam hinge structure 1 comprising a plurality of I-beams 11, which are sequentially arranged along the circumferential direction of the furnace. The ends of each adjacent I-beam 11 are connected by a hinge assembly 12. The I-beams 11 are arranged horizontally and have an H-shaped cross-section. Multiple support blocks 13 are evenly distributed along the length of the inner end surface of the I-beam 11. The outer ends of the support blocks 13 are slidably connected to the inner end surface of the I-beam 11 along the length, and the inner ends of the support blocks 13 are fixedly connected to the water-cooled wall flat steel. The undisclosed technical features of this embodiment are the same as those of the first embodiment.

[0036] In this embodiment, the rigid beam hinge structure 1 is connected to the I-beam 11 and welded to the support block 13 on the water-cooled wall flat steel to achieve the fixation of the entire water-cooled wall. The outer end of the support block 13 is slidably connected on the inner end face of the I-beam 11 along the length direction. In different furnace types and different tube spacings, the position of the support block 13 can be adjusted to meet the use requirements of different tube spacings, and the application degree is high. The ends of each two adjacent I-beams 11 are connected by a hinge assembly 12, which can ensure that the expansion of the water-cooled wall and the overall slight shaking are not affected. This structure is entirely on-site installation parts, which has the advantages of convenient transportation, low cost, and the ability to be flexibly adjusted according to the actual situation on site.

[0037] Specific implementation method three: Combination Figures 1 to 6 This embodiment describes the hinge assembly 12, which includes a movable plate 121 and two intermediate hinge plates 122. The intermediate hinge plates 122 are each fixed to the ends of the I-beam 11. The movable plate 121 is positioned inwardly between the two intermediate hinge plates 122. A connecting lug 123 is provided between the movable plate 121 and the intermediate hinge plates 122. The connecting lug 123 is connected to the movable plate 121 and the intermediate hinge plates 122, respectively, via first connecting bolts 124. The undisclosed technical features of this embodiment are the same as those of the second embodiment.

[0038] The ends of each two adjacent I-beams 11 are connected by bolts, which can ensure that the expansion of the water-cooled wall and the overall slight shaking are not affected.

[0039] Specific implementation method four: Combination Figures 7 to 9 This embodiment describes an end hinge plate 125 provided on the outer end of the I-beam 11. The inner end of the end hinge plate 125 is connected to the outer end of the I-beam 11 via a second connecting bolt 126, while the outer end of the end hinge plate 125 is fixedly connected to the water-cooled wall flat steel. The undisclosed technical features of this embodiment are the same as those of the second embodiment.

[0040] When the rigid beam hinge structure 1 cannot form a complete closed loop structure due to interference with other components, the I-beam 11 at the end is fixed to the water-cooled wall flat steel through the end hinge plate 125 and the second connecting bolt 126 .

[0041] The end hinge plate 125 is provided with a waist-shaped hole, and the second connecting bolt 126 is disposed in the waist-shaped hole to achieve position adjustment.

[0042] Specific implementation method five: Combination Figures 1 to 6To describe this embodiment, two L-shaped hanging plates 14 are symmetrically fixed to the outer ends of the support block 13 along the height direction. The horizontal ends of the L-shaped hanging plates 14 are fixed to the support block 13, and the vertical ends of the L-shaped hanging plates 14 are sleeved onto the inner ends of the I-beam 11 and are respectively arranged on the upper and lower sides of the middle crossbeam of the I-beam 11. The L-shaped hanging plates 14 are slidably connected to the inner ends of the I-beam 11. The undisclosed technical features of this embodiment are the same as those of the second specific embodiment.

[0043] This design enables the support block 13 to be adjusted in horizontal position on the I-beam 11 .

[0044] Specific implementation method six: combination Figure 1 and Figures 10 and 11 To describe this embodiment, the rear arch hanging structure 2 described in this embodiment includes a plurality of connecting plates 21, which are sequentially arranged along the width direction of the flat steel of the rear water-cooled wall of the furnace. The lower ends of the connecting plates 21 are evenly distributed with a plurality of welding lugs 22 along the length direction. The lower ends of the welding lugs 22 are fixedly connected to the arc plate on the rear arch of the rear water-cooled wall of the furnace. The upper ends of the welding lugs 22 are fixedly connected to the outer side of the lower portion of the connecting plates 21. The upper ends of the connecting plates 21 are evenly distributed with a plurality of suspension rods 23 along the length direction. The lower ends of the suspension rods 23 are hoisted and connected to the upper ends of the connecting plates 21. The upper ends of the suspension rods 23 are fixedly connected to the flat steel of the rear water-cooled wall of the furnace. The undisclosed technical features in this embodiment are the same as those in the first specific embodiment.

[0045] To address the load-bearing issue of the rear arch of the furnace rear water-cooled wall being suspended in the air, this embodiment proposes a rear arch suspension structure 2, a simple structure consisting of a suspension rod 23, a connecting plate 21, and a welding lug 22. This structure supports the rear arch by welding the rear arch suspension structure 2 to the curved plate on the rear arch of the furnace rear water-cooled wall, and also to the flat steel of the furnace rear water-cooled wall. This structure does not affect the internal structure of the boiler and is safe. This structure can adapt to different rear arch angles by adjusting the length of the suspension rod 23, providing flexibility.

[0046] Specific implementation method seven: combination Figure 1 and Figures 10 and 11 In this embodiment, the lower end of the suspension rod 23 is fixedly connected to an inverted U-shaped hanger 24. The open lower end of the inverted U-shaped hanger 24 is sleeved on the outer side of the upper end of the connecting plate 21. The connecting plate 21 and the inverted U-shaped hanger 24 are connected by fixing bolts 25. The undisclosed technical features of this embodiment are the same as those of the sixth embodiment.

[0047] Specific implementation method eight: combination Figure 1 and Figures 12 to 15This embodiment describes the positioning structure of the flag screen, comprising upper positioning flat steel bars 3 and a lower positioning bracket assembly. The upper positioning flat steel bars 3 are arranged along the width of the flag screen and are respectively fixed to the steel plates above the screen. The lower positioning bracket assembly is arranged below the screen and is fixed to the flat steel bars of the rear water-cooled wall of the furnace. The undisclosed technical features of this embodiment are the same as those of the first embodiment.

[0048] To address the problem of suspended, single-fixture flag screens on the flue rear water-cooled wall, this embodiment proposes a flag screen positioning structure: Multiple flag screens are secured by welding a 4-inch thick upper positioning flat steel bar (3) above the screens. This upper positioning flat steel bar (3) is then welded to the steel plate above the screens to prevent them from shifting during transportation. A lower positioning bracket assembly is welded to the rear water-cooled wall flat steel to support the screens. This structure, proven simple and reliable in multiple boilers, allows for the angle and dimensions of the lower positioning bracket assembly to be adjusted to suit different screen types. This effectively prevents deformation of the screens in high-temperature environments, while also being cost-effective and easy to implement. Different materials can be used for the upper positioning flat steel bar (3) and the lower positioning bracket assembly at different temperatures. For example, 06Cr19Ni10 is used for temperatures ≤670°C; 15CrMo is used for temperatures ≤550°C; and Q235B is used for temperatures ≤300°C.

[0049] Specific implementation method nine: Combination Figure 1 and Figures 12 to 13 This embodiment describes a lower positioning bracket assembly comprising multiple lower positioning brackets 4 evenly spaced along the width of the flag-type convection screen. The vertical outer ends of these lower positioning brackets 4 are fixedly connected to the flat steel of the furnace rear water-cooled wall, while the upper horizontal ends of these lower positioning brackets 4 are supported below the flag-type convection screen. The undisclosed technical features of this embodiment are the same as those of Specific Embodiment 8.

[0050] Specific implementation method ten: Combination Figure 1 and Figures 12 to 15 This embodiment describes a backing plate 5 disposed between the lower portion of the flag-shaped convection screen and the upper horizontal side of the lower positioning bracket 4. The outer end of the backing plate 5 is a downwardly curved arc extending beyond the upper horizontal side of the lower positioning bracket 4. The undisclosed technical features of this embodiment are the same as those of the ninth embodiment.

[0051] In this embodiment, a pad 5 is provided to prevent the lower positioning bracket 4 from damaging the flag-type convection screen.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A fixed limiting structure for a water wall of a corner tube boiler, characterized by: The invention comprises a rigid beam hinge structure (1), a rear arch hanging structure (2) and a flag screen positioning structure, wherein the rigid beam hinge structure (1) is arranged along the circumferential direction of the furnace, the water-cooled wall is fixedly connected to the furnace through the rigid beam hinge structure (1), the rear arch hanging structure (2) is arranged at the rear side of the furnace, and the rear arch hanging structure (2) is fixedly connected between the arc plate on the rear arch of the furnace rear water-cooled wall and the flat steel of the furnace rear water-cooled wall, the flag screen positioning structure is arranged on the flag convection screen, and the flag convection screen is fixedly connected to the flat steel of the furnace rear water-cooled wall through the flag screen positioning structure.

2. The fixed limiting structure of the water wall of a corner tube boiler according to claim 1, characterized in that: The rigid beam hinge structure (1) comprises a plurality of I-beams (11), which are arranged in sequence along the circumferential direction of the furnace, and the ends of each two adjacent I-beams (11) are connected by a hinge assembly (12), the I-beams (11) are arranged horizontally and the cross section of the I-beams (11) is "H"-shaped, and a plurality of support blocks (13) are evenly distributed on the inner end surface of the I-beam (11) along the length direction, the outer ends of the support blocks (13) are slidably connected to the inner end surface of the I-beam (11) along the length direction, and the inner ends of the support blocks (13) are fixedly connected to the water-cooled wall flat steel.

3. The fixed limiting structure of the water wall of a corner tube boiler according to claim 2, characterized in that: The hinge assembly (12) includes a movable plate (121) and two intermediate hinge plates (122), wherein the intermediate hinge plates (122) are respectively fixed to the ends of the I-beam (11), the movable plate (121) is arranged on the inner side of the middle between the two intermediate hinge plates (122), a connecting ear plate (123) is provided between the movable plate (121) and the intermediate hinge plates (122), and the connecting ear plate (123) is connected to the movable plate (121) and the intermediate hinge plates (122) respectively by first connecting bolts (124).

4. The fixed limiting structure for the water wall of a corner tube boiler according to claim 2, characterized in that: An end hinge plate (125) is provided on the outer end of the I-beam (11) at the end, the inner end of the end hinge plate (125) is connected to the outer end of the I-beam (11) via a second connecting bolt (126), and the outer end of the end hinge plate (125) is fixed to the water-cooled wall flat steel.

5. The fixed limiting structure of the water wall of a corner tube boiler according to claim 2, characterized in that: Two L-shaped hanging plates (14) are symmetrically fixed to the outer end of the support block (13) along the height direction. The horizontal ends of the L-shaped hanging plates (14) are fixed to the support block (13). The vertical ends of the L-shaped hanging plates (14) are sleeved on the inner end of the I-beam (11) and are respectively arranged on the upper and lower sides of the middle crossbeam of the I-beam (11). The L-shaped hanging plates (14) are slidably connected to the inner end of the I-beam (11).

6. The fixed limiting structure for the water wall of a corner tube boiler according to claim 1, characterized in that: The rear arch hanging structure (2) comprises a plurality of connecting plates (21), which are arranged in sequence along the width direction of the flat steel of the rear water-cooled wall of the furnace; a plurality of welding ears (22) are evenly distributed at the lower end of the connecting plate (21) along the length direction; the lower end of the welding ear (22) is fixedly connected to the arc plate on the rear arch of the rear water-cooled wall of the furnace; the upper end of the welding ear (22) is fixedly connected to the outer side of the lower part of the connecting plate (21); a plurality of suspension rods (23) are evenly distributed at the upper end of the connecting plate (21) along the length direction; the lower end of the suspension rod (23) is hoisted and connected to the upper end of the connecting plate (21); the upper end of the suspension rod (23) is fixedly connected to the flat steel of the rear water-cooled wall of the furnace.

7. The fixed limiting structure of the water wall of a corner tube boiler according to claim 6, characterized in that: The lower end of the suspension rod (23) is fixedly connected to an inverted "U"-shaped hanger (24), and the open lower end of the inverted "U"-shaped hanger (24) is sleeved on the outer side of the upper end of the connecting plate (21). The connecting plate (21) and the inverted "U"-shaped hanger (24) are connected by fixing bolts (25).

8. The fixed limiting structure for the water wall of a corner tube boiler according to claim 1, characterized in that: The flag-type screen positioning structure comprises an upper positioning flat steel (3) and a lower positioning bracket group, wherein the upper positioning flat steel (3) is arranged along the width direction of the flag-type convection screen and is respectively fixedly connected to the steel plates above the flag-type convection screen, and the lower positioning bracket group is arranged below the flag-type convection screen and is fixedly connected to the flat steel of the rear water-cooled wall of the furnace.

9. The fixed limiting structure for the water wall of a corner tube boiler according to claim 8, characterized in that: The lower positioning bracket group includes a plurality of lower positioning brackets (4) uniformly distributed along the width direction of the flag-type convection screen, the vertical sides of the outer ends of the lower positioning brackets (4) are fixedly connected to the flat steel of the rear water-cooled wall of the furnace, and the horizontal sides of the upper ends of the lower positioning brackets (4) are supported below the flag-type convection screen.

10. The fixed limiting structure for the water wall of a corner tube boiler according to claim 9, characterized in that: A pad (5) is provided between the lower side of the flag-type convection screen and the upper horizontal side of the lower positioning bracket (4). The outer end of the pad (5) is a downwardly curved arc surface extending to the outside of the upper horizontal side of the lower positioning bracket (4).

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