Novel n-shaped boiler top ladle metal sealing device

Abstract

The invention relates to a novel n-shaped boiler top ladle metal sealing device, belongs to the technical field of sealing devices, and aims to solve the sealing problem that an n-shaped boiler top suspender penetrates through an inner protection plate area of a boiler top cladding framework. The sealing device comprises a bellow expansion joint and a sleeve structure, and the sleeve structure is arranged on the suspender in a sleeving mode; the casing pipe structure is sleeved with the bellow expansion joint, the top end of the bellow expansion joint sleeve is welded and fixed to the casing pipe structure, and the bottom end of the bellow expansion joint sleeve is welded and fixed to the inserting component of the hanging rod. The sealing device solves the long-term sealing problem of the area, penetrating through the furnace top ladle, of the furnace top suspender of the large-capacity n-shaped unit, effectively prevents heat and fly ash from overflowing under any operation working condition, reduces heat dissipation loss of a boiler, and improves heat efficiency of the boiler and overall economic benefits of the unit.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing devices, and in particular relates to a novel II-type boiler furnace top large metal sealing device. Background Art

[0002] The position where the furnace top hanger of the large-capacity Π-type furnace unit passes through the furnace top bag is not sealed with the furnace top inner guard plate and the furnace top insulation castable. When the boiler is running, heat and fly ash are lost from the gaps, which increases the heat dissipation loss of the boiler and reduces the thermal efficiency of the boiler. Moreover, this undesirable condition will worsen with the extension of the operating time. Since the materials of the furnace top hanger in different areas of the Π-type furnace unit are different, it is necessary to set a reasonable sealing structure corresponding to the hanger structure of different materials. This also brings considerable difficulties to the research and development of the Π-type boiler furnace top large bag metal sealing device. Therefore, in order to solve the sealing problem of the Π-type boiler furnace top hanger passing through the furnace top covering frame inner guard plate area, reduce the heat dissipation loss of the boiler, improve the thermal efficiency of the boiler and the overall economic benefits of the unit, it is in line with actual needs to develop a new type of Π-type boiler furnace top large bag metal sealing device. Summary of the invention

[0003] The present invention aims to solve the sealing problem of the inner guard plate area of ​​the furnace roof suspension rod of a Π-type boiler through the furnace roof covering frame; and further provides a novel Π-type boiler furnace roof large metal sealing device;

[0004] A novel II-type boiler furnace top large metal sealing device, the sealing device comprises a corrugated expansion joint and a casing structure, the casing structure is sleeved on the suspension rod, the corrugated expansion joint is sleeved on the outside of the casing structure, the top end of the corrugated expansion joint sleeve is welded and fixed to the casing structure, and the bottom end of the corrugated expansion joint sleeve is welded and fixed to the insertion component of the suspension rod;

[0005] Further, the sealing device is sleeved on the No. 1 suspension rod, and the sealing device includes a No. 1 corrugated expansion joint and a welded sleeve structure. The No. 1 corrugated expansion joint is inserted in the top inner guard plate of the ceiling sheathing frame in the vertical direction, and the bottom outer wall of the No. 1 corrugated expansion joint is welded and fixed to the top of the top inner guard plate of the ceiling sheathing frame. The welded sleeve structure is inserted in the No. 1 corrugated expansion joint, and the bottom end of the welded sleeve structure extends to the bottom of the top inner guard plate of the ceiling sheathing frame, and the top of the welded sleeve structure extends to the top of the No. 1 corrugated expansion joint, and the top of the No. 1 corrugated expansion joint is welded and fixed to the upper part of the welded sleeve structure. The No. 1 suspension rod is inserted in the welded sleeve structure, and both ends of the No. 1 suspension rod extend to the outside of the welded sleeve structure, and the No. 1 suspension rod is welded and fixed to the welded sleeve structure.

[0006] Further, the welded casing structure includes an integrated casing and an annular gasket body, a No. 1 hanger rod is inserted in the integrated casing, and both ends of the No. 1 hanger rod extend to the outside of the integrated casing, the No. 1 hanger rod is welded and fixed to the integrated casing, the annular gasket body is sleeved on the outer circumferential surface of the upper part of the integrated casing, and the annular gasket body is welded and fixed to the integrated casing, the top end of the No. 1 corrugated expansion joint is located below the annular gasket body, and the top end of the No. 1 corrugated expansion joint is welded and fixed to the bottom of the annular gasket body;

[0007] Furthermore, the annular gasket body includes two semi-annular gaskets, the opening ends of the two semi-annular gaskets are relatively spliced ​​and welded to form the annular gasket body, and the top of the No. 1 corrugated expansion joint and the bottom of each semi-annular gasket in the annular gasket body are welded and fixed;

[0008] Further, the welding between the No. 1 boom and the integrated casing is prefabricated welding, and the welding work is completed in the welding workshop;

[0009] Further, the welding between the two semi-annular gaskets in the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint and the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint and the top inner guard plate of the ceiling sheathing frame is on-site welding, and the welding work is completed at the construction site.

[0010] Further, the sealing device is sleeved on the No. 2 hanger rod, the No. 2 hanger rod is inserted in the ceiling support beam along the vertical direction, and the bottom end of the No. 2 hanger rod extends to the bottom of the ceiling support beam, the sealing device includes a No. 2 corrugated expansion joint and a combined casing structure, the combined casing structure is sleeved on the upper part of the No. 2 hanger rod, the No. 2 corrugated expansion joint is sleeved on the outside of the combined casing structure, and the top end of the No. 2 corrugated expansion joint is welded and fixed to the combined casing structure, and the bottom end of the No. 2 corrugated expansion joint is welded and fixed to the outer top of the ceiling support beam;

[0011] Further, the combined casing structure includes a high temperature resistant sealing material layer and a combined casing, the combined casing is sleeved on the upper part of the No. 2 suspension rod, the high temperature resistant sealing material layer is arranged between the combined casing and the No. 2 suspension rod, and the high temperature resistant sealing material layer is tightly connected to the No. 2 suspension rod through the combined casing, the top end of the No. 2 corrugated expansion joint is sleeved on the outside of the combined casing, and the top end of the No. 2 corrugated expansion joint is welded and fixed to the combined casing;

[0012] Further, the combined casing includes a pipe hoop and two casing half shells, the open ends of the two casing half shells are relatively assembled to form a casing body, the pipe hoop is sleeved on the upper part of the casing body, and the two casing half shells are detachably connected through the pipe hoop, the second corrugated expansion joint is sleeved on the lower part of the casing body, and the top of the second corrugated expansion joint and the two casing half shells in the casing body are welded and fixed;

[0013] The pipe hoop comprises two half hoop bodies, the open ends of the two half hoop bodies are relatively assembled to form a pipe hoop body, and a connecting ear plate is respectively provided on both sides of the open end of each half hoop body, and a connecting ear plate on one half hoop body is detachably connected with a corresponding connecting ear plate on the other half hoop body through a bolt and nut assembly;

[0014] Further, the welding between the No. 2 corrugated expansion joint and the combined casing is on-site welding, and the welding work is completed at the construction site; the welding between the No. 2 corrugated expansion joint and the ceiling support beam is on-site welding, and the welding work is completed at the construction site;

[0015] The beneficial effects of this application compared to the prior art are as follows:

[0016] The present application provides a novel metal sealing device for the furnace top bag of a Π-type boiler, which can specifically propose sealing structures of different structures according to the material characteristics of hangers of different materials. For the sealing work of hangers made of materials other than 42CrMo5-6, a welded sleeve is adopted, which has the characteristics of simple structure, convenient construction and low cost. For the sealing work of hangers made of 42CrMo5-6 material, considering the particularity that hangers made of 42CrMo5-6 material have poor weldability and need for tempering treatment after welding, a combined sleeve structure is designed to meet the sealing requirements of hangers made of 42CrMo5-6 material, which has the characteristics of high flexibility, strong adaptability and convenient assembly. The design of the present invention can solve the sealing problem of the furnace top hanger passing through the furnace top bag area that has long plagued large-capacity Π-type units, effectively prevent the overflow of heat and fly ash under any operating conditions, reduce the heat dissipation loss of the boiler, and improve the thermal efficiency of the boiler and the overall economic benefits of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a new sealing structure for a non-42CrMo5-6 material suspension rod passing through a furnace top bag;

[0018] Figure 2 This is a schematic diagram of the new sealing structure of the 42CrMo5-6 material suspension rod passing through the furnace top bag;

[0019] In the figure, 1 is the top inner guard plate of the ceiling sheathing frame, 2 is the No. 1 corrugated expansion joint, 3 is the No. 1 hanger, 4 is the integrated casing, 5 is the semi-annular gasket, 6 is the ceiling support beam, 7 is the pipe clamp, 8 is the high temperature resistant sealing material layer, 9 is the casing half shell, 10 is the No. 2 hanger and 11 is the No. 2 corrugated expansion joint. DETAILED DESCRIPTION

[0020] Specific implementation method 1: Combination Figure 1 to Figure 2This embodiment is described. In this embodiment, a novel II-type boiler furnace top large metal sealing device is provided. The sealing device includes a corrugated expansion joint and a sleeve structure. The sleeve structure is sleeved on the suspension rod. The corrugated expansion joint is sleeved on the outside of the sleeve structure. The top end of the corrugated expansion joint sleeve is welded and fixed to the sleeve structure. The bottom end of the corrugated expansion joint sleeve is welded and fixed to the plug-in component of the suspension rod.

[0021] The sealing device is sleeved on the No. 1 suspension rod 3, and the sealing device includes a No. 1 corrugated expansion joint 2 and a welded sleeve structure. The No. 1 corrugated expansion joint 2 is inserted into the top inner guard plate 1 of the ceiling sheathing frame in the vertical direction, and the bottom outer wall of the No. 1 corrugated expansion joint 2 is welded and fixed to the top of the top inner guard plate 1 of the ceiling sheathing frame. The welded sleeve structure is inserted into the No. 1 corrugated expansion joint 2, and the bottom end of the welded sleeve structure extends to the bottom of the top inner guard plate 1 of the ceiling sheathing frame, and the top of the welded sleeve structure extends to the top of the No. 1 corrugated expansion joint 2, and the top of the No. 1 corrugated expansion joint 2 is welded and fixed to the upper part of the welded sleeve structure. The No. 1 suspension rod 3 is inserted into the welded sleeve structure, and both ends of the No. 1 suspension rod 3 extend to the outside of the welded sleeve structure, and the No. 1 suspension rod 3 is welded and fixed to the welded sleeve structure;

[0022] The welded sleeve structure includes an integrated sleeve 4 and an annular gasket body, the No. 1 hanger 3 is inserted in the integrated sleeve 4, and both ends of the No. 1 hanger 3 extend to the outside of the integrated sleeve 4, the No. 1 hanger 3 is welded and fixed to the integrated sleeve 4, the annular gasket body is sleeved on the outer circumferential surface of the upper part of the integrated sleeve 4, and the annular gasket body is welded and fixed to the integrated sleeve 4, the top of the No. 1 corrugated expansion joint 2 is located below the annular gasket body, and the top of the No. 1 corrugated expansion joint 2 is welded and fixed to the bottom of the annular gasket body;

[0023] The annular gasket body includes two semi-annular gaskets 5, the open ends of the two semi-annular gaskets 5 are relatively spliced ​​and welded to form an annular gasket body, and the top of the No. 1 corrugated expansion joint 2 and the bottom of each semi-annular gasket 5 in the annular gasket body are welded and fixed;

[0024] The welding between the No. 1 suspension rod 3 and the integrated casing 4 is prefabrication welding, and the welding work is completed in the welding workshop;

[0025] The welding between the two semi-annular gaskets 5 in the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint 2 and the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint 2 and the top inner guard plate 1 of the ceiling sheathing frame is on-site welding, and the welding work is completed at the construction site.

[0026] In the present embodiment, the No. 1 hanger rod 3 is not made of 42CrMo5-6 material. The hanger rod of this material has good welding performance. Therefore, it is connected to the integrated sleeve 4 by welding. In order to ensure the connection accuracy and connection reliability of the No. 1 corrugated expansion joint 2 used for sealing, an annular gasket body is arranged on the outside of the integrated sleeve 4. The annular gasket body has two functions. The first point is to axially limit the No. 1 corrugated expansion joint 2, and the second point is to provide a welding fulcrum for the No. 1 corrugated expansion joint 2, so that it can be accurately welded with the integrated sleeve 4 to better achieve its sealing effect. It is worth noting that the No. 1 hanger rod 3 and the welded sleeve structure are only welded and fixed at the upper end.

[0027] Specific implementation method 2: Combination Figure 1 to Figure 2 This embodiment is described. In this embodiment, a novel II-type boiler furnace top large metal sealing device is provided. The sealing device includes a corrugated expansion joint and a sleeve structure. The sleeve structure is sleeved on the suspension rod. The corrugated expansion joint is sleeved on the outside of the sleeve structure. The top end of the corrugated expansion joint sleeve is welded and fixed to the sleeve structure. The bottom end of the corrugated expansion joint sleeve is welded and fixed to the plug-in component of the suspension rod.

[0028] The sealing device is sleeved on the No. 2 hanger rod 10, and the No. 2 hanger rod 10 is inserted in the ceiling support beam 6 along the vertical direction, and the bottom end of the No. 2 hanger rod 10 extends to the bottom of the ceiling support beam 6, and the sealing device includes a No. 2 corrugated expansion joint 11 and a combined sleeve structure, the combined sleeve structure is sleeved on the upper part of the No. 2 hanger rod 10, and the No. 2 corrugated expansion joint 11 is sleeved on the outside of the combined sleeve structure, and the top end of the No. 2 corrugated expansion joint 11 is welded and fixed to the combined sleeve structure, and the bottom end of the No. 2 corrugated expansion joint 11 is welded and fixed to the outer top of the ceiling support beam 6;

[0029] The combined casing structure includes a high temperature resistant sealing material layer 8 and a combined casing, the combined casing is sleeved on the upper part of the No. 2 suspension rod 10, the high temperature resistant sealing material layer 8 is arranged between the combined casing and the No. 2 suspension rod 10, and the high temperature resistant sealing material layer 8 is tightly connected to the No. 2 suspension rod 10 through the combined casing, the top end of the No. 2 corrugated expansion joint 11 is sleeved on the outside of the combined casing, and the top end of the No. 2 corrugated expansion joint 11 is welded and fixed to the combined casing;

[0030] The combined casing includes a pipe hoop 7 and two casing half shells 9. The open ends of the two casing half shells 9 are relatively assembled to form a casing body. The pipe hoop 7 is sleeved on the upper part of the casing body, and the two casing half shells 9 are detachably connected through the pipe hoop 7. The second corrugated expansion joint 11 is sleeved on the lower part of the casing body, and the top of the second corrugated expansion joint 11 and the two casing half shells 9 in the casing body are welded and fixed;

[0031] The pipe hoop 7 comprises two half hoop bodies, the open ends of the two half hoop bodies are relatively assembled to form a pipe hoop body, and a connecting ear plate is respectively provided on both sides of the open end of each half hoop body, and a connecting ear plate on one half hoop body is detachably connected with a corresponding connecting ear plate on the other half hoop body through a bolt and nut assembly;

[0032] The welding between the second corrugated expansion joint 11 and the combined casing is on-site welding, and the welding work is completed at the construction site. The welding between the second corrugated expansion joint 11 and the ceiling support beam 6 is on-site welding, and the welding work is completed at the construction site.

[0033] In the present embodiment, the No. 2 hanger 10 is a hanger made of 42CrMo5-6 material. The weldability of hangers made of this material is poor and modulation treatment is required after welding. Therefore, a combined sleeve and bolt fastening method are used for connection. In order to ensure the tightness and sealing of the connection between the combined sleeve and the No. 2 hanger 10, a high-temperature resistant sealing material layer is used as a filler to fill between the combined sleeve and the No. 2 hanger 10. The top end of the No. 2 corrugated expansion joint 11 is welded to the outer wall of the combined sleeve, and the bottom end of the No. 2 corrugated expansion joint 11 is welded and fixed to the top of the ceiling support beam 6, so that the hanger can be fully wrapped, and its sealing effect can be guaranteed to the greatest extent. It is worth noting that the No. 2 hanger 10 and the combined sleeve are not welded.

[0034] Working principle:

[0035] For non-42CrMo5-6 material suspension rods, the following forms are adopted:

[0036] 1. In the manufacturing workshop, the No. 1 suspension rod 3 is welded and fixed to the integrated casing 4;

[0037] 2. At the construction site, weld the lower end of the No. 1 corrugated expansion joint 2 to the top of the inner guard plate 1 at the top of the ceiling sheathing frame, insert the integrated sleeve 4 provided with the No. 1 suspension rod 3 into the No. 1 corrugated expansion joint 2, and weld the upper end of the No. 1 corrugated expansion joint 2 to the integrated sleeve 4 on site through a pair of semi-annular gaskets 5;

[0038] For non-42CrMo5-6 material suspension rods, the following forms are adopted:

[0039] 1. At the construction site, the lower end of the No. 2 corrugated expansion joint 11 is welded to the ceiling support beam on site;

[0040] 2. The upper end of the No. 2 corrugated expansion joint 11 does not adopt the welded casing form. Instead, a combined casing structure of two casing half shells 9 + pipe clamp 7 + high-temperature resistant sealing material layer 8 is used to work instead of the welded casing structure. After the combined casing structure and the No. 2 hanger 10 are fastened and installed, they are welded to the No. 2 corrugated expansion joint 11 on site.

Claims

1. A new type of II-type boiler furnace top large metal sealing device, characterized by: The sealing device includes a bellows expansion joint and a sleeve structure. The sleeve structure is sleeved on the suspension rod, the bellows expansion joint is sleeved on the outside of the sleeve structure, the top end of the bellows expansion joint sleeve is welded and fixed to the sleeve structure, and the bottom end of the bellows expansion joint sleeve is welded and fixed to the plug-in component of the suspension rod.

2. According to claim 1, a novel II-type boiler furnace top large metal sealing device is characterized in that: The sealing device is sleeved on the No. 1 suspension rod (3), and the sealing device comprises a No. 1 corrugated expansion joint (2) and a welded sleeve structure. The No. 1 corrugated expansion joint (2) is inserted into the top inner guard plate (1) of the ceiling sheathing frame in the vertical direction, and the bottom outer wall of the No. 1 corrugated expansion joint (2) is welded and fixed to the top of the top inner guard plate (1) of the ceiling sheathing frame. The welded sleeve structure is inserted into the No. 1 corrugated expansion joint (2), and the bottom end of the welded sleeve structure extends to the bottom of the top inner guard plate (1) of the ceiling sheathing frame, and the top end of the welded sleeve structure extends to the top of the No. 1 corrugated expansion joint (2), and the top end of the No. 1 corrugated expansion joint (2) is welded and fixed to the upper part of the welded sleeve structure. The No. 1 suspension rod (3) is inserted into the welded sleeve structure, and both ends of the No. 1 suspension rod (3) extend to the outside of the welded sleeve structure, and the No. 1 suspension rod (3) is welded and fixed to the welded sleeve structure.

3. A novel II-type boiler furnace top large metal sealing device according to claim 2, characterized in that: The welded sleeve structure comprises an integrated sleeve (4) and an annular gasket body, a No. 1 hanger (3) is inserted into the integrated sleeve (4), and both ends of the No. 1 hanger (3) extend to the outside of the integrated sleeve (4), the No. 1 hanger (3) and the integrated sleeve (4) are welded and fixed, the annular gasket body is sleeved on the outer circumferential surface of the upper part of the integrated sleeve (4), and the annular gasket body and the integrated sleeve (4) are welded and fixed, the top end of the No. 1 corrugated expansion joint (2) is located below the annular gasket body, and the top end of the No. 1 corrugated expansion joint (2) is welded and fixed to the bottom of the annular gasket body.

4. A novel II-type boiler furnace top large metal sealing device according to claim 3, characterized in that: The annular gasket body comprises two semi-annular gaskets (5), the open ends of the two semi-annular gaskets (5) are relatively spliced ​​and welded to form the annular gasket body, and the top of the No. 1 corrugated expansion joint (2) and the bottom of each semi-annular gasket (5) in the annular gasket body are welded and fixed.

5. A novel II-type boiler furnace top large metal sealing device according to claim 4, characterized in that: The welding between the No. 1 suspension rod (3) and the integrated sleeve (4) is prefabrication welding, and the welding work is completed in a welding workshop.

6. A novel II-type boiler furnace top large metal sealing device according to claim 5, characterized in that: The welding between the two semi-annular gaskets (5) in the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint (2) and the annular gasket body is on-site welding, and the welding work is completed at the construction site. The welding between the No. 1 corrugated expansion joint (2) and the top inner guard plate (1) of the ceiling sheathing frame is on-site welding, and the welding work is completed at the construction site.

7. A novel II-type boiler furnace top large metal sealing device according to claim 1, characterized in that: The sealing device is sleeved on the No. 2 hanger (10), and the No. 2 hanger (10) is inserted into the ceiling support beam (6) in the vertical direction, and the bottom end of the No. 2 hanger (10) extends to the bottom of the ceiling support beam (6). The sealing device includes a No. 2 corrugated expansion joint (11) and a combined sleeve structure, the combined sleeve structure is sleeved on the upper part of the No. 2 hanger (10), the No. 2 corrugated expansion joint (11) is sleeved on the outside of the combined sleeve structure, and the top end of the No. 2 corrugated expansion joint (11) is welded and fixed to the combined sleeve structure, and the bottom end of the No. 2 corrugated expansion joint (11) is welded and fixed to the outer top of the ceiling support beam (6).

8. A novel II-type boiler furnace top large metal sealing device according to claim 7, characterized in that: The combined casing structure comprises a high temperature resistant sealing material layer (8) and a combined casing, wherein the combined casing is sleeved on the upper part of the second suspension rod (10), the high temperature resistant sealing material layer (8) is arranged between the combined casing and the second suspension rod (10), and the high temperature resistant sealing material layer (8) is tightly connected to the second suspension rod (10) through the combined casing, and the top end of the second corrugated expansion joint (11) is sleeved on the outer side of the combined casing, and the top end of the second corrugated expansion joint (11) is welded and fixed to the combined casing.

9. A novel II-type boiler furnace top large metal sealing device according to claim 8, characterized in that: The combined casing comprises a pipe hoop (7) and two casing half shells (9), the open ends of the two casing half shells (9) are relatively assembled to form a casing body, the pipe hoop (7) is sleeved on the upper part of the casing body, and the two casing half shells (9) are detachably connected through the pipe hoop (7), a second corrugated expansion joint (11) is sleeved on the lower part of the casing body, and the top end of the second corrugated expansion joint (11) and the two casing half shells (9) in the casing body are both welded and fixed; The pipe hoop (7) comprises two half hoop bodies, the open ends of the two half hoop bodies are relatively assembled to form a pipe hoop body, and a connecting ear plate is respectively provided on both sides of the open end of each half hoop body, and a connecting ear plate on one half hoop body is detachably connected to a corresponding connecting ear plate on the other half hoop body through a bolt and nut assembly.

10. A novel II-type boiler furnace top large metal sealing device according to claim 9, characterized in that: The welding between the second corrugated expansion joint (11) and the combined casing is on-site welding, and the welding work is completed at the construction site. The welding between the second corrugated expansion joint (11) and the ceiling support beam (6) is on-site welding, and the welding work is completed at the construction site.

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