Sealing assembly for air preheater

Abstract

The utility model relates to a sealing assembly for an air preheater, which belongs to the technical field of air preheaters and comprises a shell, fixing transverse plates are fixedly mounted at the top and the bottom of the shell, a central column is rotatably mounted between the two fixing transverse plates, and a plurality of partition plates are fixedly mounted on the surface of the central column. According to the sealing assembly for the air preheater, the sealing assembly is arranged on the fixed transverse plate, a hydraulic cylinder in the sealing assembly drives a pressing plate to move and drives a fan-shaped sealing plate at one end of a spring to move, so that the position of the fan-shaped sealing plate is adjusted, when a partition plate deforms, the fan-shaped sealing plate is always in contact with the upper end and the lower end of the partition plate, and the sealing effect is kept; the problems that due to the fact that the fan-shaped sealing plate is fixed, after the partition plate in the rotor deforms due to thermal expansion and cold contraction and the like, a gap is easily generated between the partition plate and the fan-shaped sealing plate, the sealing effect is poor, and smoke and air directly circulate are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to a sealing component for air preheaters. Background Art

[0002] An air preheater is a device used to improve the heat exchange performance of a boiler and reduce energy consumption. It is usually divided into plate air preheaters, tubular air preheaters and rotary air preheaters. The rotary air preheater is a regenerative air preheater that uses flue gas and air to alternately pass through a metal heating surface to heat the air. It has the advantages of compact structure, small size and light weight, and is suitable for use in large boilers. However, it has a complex structure, is difficult to maintain and overhaul, and has a large amount of air leakage.

[0003] The rotary air preheater rotates slowly when working. The flue gas enters the flue gas side of the air preheater and is then discharged. The heat carried by the flue gas is absorbed by the heat sink. As the air preheater rotates, the heat sink moves to the air side and transfers the heat to the air. The air is heated and then transmitted to the boiler, thereby increasing the combustion temperature and promoting the complete combustion of the fuel. The higher combustion temperature speeds up the chemical reaction rate, making the combustion more complete and reducing the generation of incompletely burned fuel and carbon monoxide.

[0004] A common sealing assembly of a rotary air preheater usually comprises a partition in a rotor in contact with a fixed fan-shaped sealing plate to limit direct flow between flue gas and air. However, since the fan-shaped sealing plate is fixed, deformation of the partition in the rotor due to thermal expansion and contraction may easily cause a gap between the partition and the fan-shaped sealing plate, resulting in poor sealing effect and direct flow of flue gas and air. In view of this, the present application proposes a sealing assembly for an air preheater. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sealing assembly for an air preheater, which has the advantages of being able to adjust the position of a fan-shaped sealing plate so that the fan-shaped sealing plate maintains contact with the partition plate, and solves the problem that the fan-shaped sealing plate is fixed, and the partition plate in the rotor is deformed due to thermal expansion and contraction, which easily leads to a gap between the partition plate and the fan-shaped sealing plate, resulting in poor sealing effect and direct circulation of flue gas and air.

[0006] To achieve the above object, the utility model provides the following technical solutions: a sealing assembly for an air preheater, comprising a shell, the top and bottom of the shell are fixedly mounted with fixed horizontal plates, a central column is rotatably mounted between two of the fixed horizontal plates, a plurality of partitions are fixedly mounted on the surface of the central column, a heat sink is fixedly mounted between two adjacent partitions, an outer cylinder is fixedly mounted on one side of the partition, and a sealing assembly is arranged on the fixed horizontal plate;

[0007] The sealing assembly includes a hydraulic cylinder fixedly mounted on the side of the fixed cross plate away from the partition, a pressure plate fixedly mounted on the movable end of the hydraulic cylinder, two rows of springs fixedly mounted on the bottom of the pressure plate, and a fan-shaped sealing plate fixedly mounted on the bottom of the spring.

[0008] Furthermore, one end of the fan-shaped sealing plate is in contact with the surface of the central column, and the other end of the fan-shaped sealing plate is flush with the outer side of the outer cylinder.

[0009] Furthermore, the bottom and the bottom of the partition are fixedly mounted with contact round heads, and the bottom of the fan-shaped sealing plate is provided with a nearly rounded corner.

[0010] Furthermore, two sealing rings are fixedly installed on the surface of the outer cylinder, and two sealing grooves matched with the sealing rings are fixedly installed on the inner side wall of the outer shell.

[0011] Furthermore, a rotating gear is fixedly mounted on the surface of the outer cylinder, and the rotating gear is located between the two sealing rings.

[0012] Furthermore, a mounting box is fixedly mounted on the surface of the housing, and a driving gear meshing with the rotating gear is arranged inside the mounting box.

[0013] Furthermore, a reducer is fixedly installed on the top of the installation box, a rotating motor whose output end is fixedly connected to the input end of the reducer is fixedly installed on the top of the reducer, and the output end of the reducer is fixedly connected to the rotating shaft of the driving gear.

[0014] Compared with the prior art, the utility model provides a sealing assembly for an air preheater, which has the following beneficial effects:

[0015] The sealing assembly for the air preheater is provided on a fixed transverse plate, and a hydraulic cylinder in the sealing assembly drives a pressure plate to move, thereby driving a fan-shaped sealing plate at one end of a spring to move, so as to adjust the position of the fan-shaped sealing plate. When the partition plate is deformed, the fan-shaped sealing plate is always in contact with the upper and lower ends of the partition plate to maintain the sealing effect, thereby solving the problem that the fan-shaped sealing plate is fixed, and the partition plate in the rotor is deformed due to thermal expansion and contraction, which easily leads to a gap between the partition plate and the fan-shaped sealing plate, resulting in poor sealing effect and direct circulation of flue gas and air. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a top view of the outer cylinder of the utility model;

[0018] Figure 3 This is a schematic diagram of the contact between the partition and the fan-shaped sealing plate of the utility model;

[0019] Figure 4 It is a three-dimensional schematic diagram of the structure of the utility model.

[0020] In the figure: 1. outer shell; 2. fixed horizontal plate; 3. center column; 4. partition; 41. contact round head; 5. outer cylinder; 6. sealing assembly; 61. hydraulic cylinder; 62. pressure plate; 63. spring; 64. fan-shaped sealing plate; 641. approach fillet; 7. sealing ring; 8. sealing groove; 9. rotating gear; 10. installation box; 11. reducer; 12. rotating motor; 13. driving gear; 14. heat sink. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figures 1 to 4 A sealing assembly for an air preheater comprises a shell 1, wherein fixed transverse plates 2 are fixedly mounted on the top and bottom of the shell 1, a central column 3 is rotatably mounted between two fixed transverse plates 2, a plurality of partitions 4 are fixedly mounted on the surface of the central column 3, a heat sink 14 is fixedly mounted between two adjacent partitions 4, an outer cylinder 5 is fixedly mounted on one side of the partition 4, and a sealing assembly 6 is arranged on the fixed transverse plate 2.

[0023] The sealing assembly 6 includes a hydraulic cylinder 61 fixedly mounted on the side of the fixed horizontal plate 2 away from the partition 4, a pressure plate 62 is fixedly mounted on the movable end of the hydraulic cylinder 61, two rows of springs 63 are fixedly mounted on the bottom of the pressure plate 62, and a fan-shaped sealing plate 64 is fixedly mounted on the bottom of the spring 63. The hydraulic cylinder 61 drives the pressure plate 62 to move, drives the spring 63 to move, drives the fan-shaped sealing plate 64 to approach the partition 4, so that the fan-shaped sealing plate 64 contacts the partition 4 to achieve sealing, and under the action of the spring 63, prevents the partition 4 and the fan-shaped sealing plate 64 from having a hard collision.

[0024] Secondly, one end of the sector-shaped sealing plate 64 contacts the surface of the central column 3 , and the other end of the sector-shaped sealing plate 64 is flush with the outer side of the outer tube 5 .

[0025] A contact round head 41 is fixedly mounted on the bottom and the bottom of the partition 4 , and a near rounded corner 641 is formed at the bottom of the sector-shaped sealing plate 64 .

[0026] Meanwhile, a rotating gear 9 is fixedly mounted on the surface of the outer cylinder 5 , and the rotating gear 9 is located in the middle position of the surface of the outer cylinder 5 .

[0027] A mounting box 10 is fixedly mounted on the surface of the housing 1 , and a driving gear 13 meshing with the rotating gear 9 is arranged inside the mounting box 10 .

[0028] Secondly, a reducer 11 is fixedly installed on the top of the installation box 10, and a rotating motor 12 whose output end is fixedly connected to the input end of the reducer 11 is fixedly installed on the top of the reducer 11, and the output end of the reducer 11 is fixedly connected to the rotating shaft of the driving gear 13. The rotating motor 12 drives the reducer 11 to work, drives the driving gear 13 to rotate, drives the rotating gear 9 to rotate, and drives the outer cylinder 5 to rotate.

[0029] Embodiment 2: Based on Embodiment 1, two sealing rings 7 are fixedly installed on the surface of the outer tube 5, and two sealing grooves 8 matching with the sealing rings 7 are fixedly installed on the inner side wall of the outer shell 1. The sealing ring 7 and the sealing groove 8 cooperate to seal the gap between the outer shell 1 and the outer tube 5, thereby preventing air and smoke from leaking in the gap between the outer shell 1 and the outer tube 5.

[0030] When this embodiment is in use, the position of the fan-shaped sealing plate 64 is adjusted through the sealing assembly 6 so that the fan-shaped sealing plate 64 always maintains contact with the partition 4, thereby improving the sealing effect, reducing the impact of the partition 4 deformation on the sealing effect, and improving the heat exchange efficiency.

[0031] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing assembly for an air preheater, comprising a housing (1), characterized in that: The top and bottom of the housing (1) are both fixedly mounted with fixed transverse plates (2), a central column (3) is rotatably mounted between the two fixed transverse plates (2), a plurality of partitions (4) are fixedly mounted on the surface of the central column (3), a heat sink (14) is fixedly mounted between two adjacent partitions (4), an outer cylinder (5) is fixedly mounted on one side of the partition (4), and a sealing assembly (6) is provided on the fixed transverse plate (2); The sealing assembly (6) comprises a hydraulic cylinder (61) fixedly mounted on a side of the fixed transverse plate (2) away from the partition plate (4); a pressure plate (62) is fixedly mounted on the movable end of the hydraulic cylinder (61); two rows of springs (63) are fixedly mounted on the bottom of the pressure plate (62); and a fan-shaped sealing plate (64) is fixedly mounted on the bottom of the spring (63).

2. The sealing assembly for an air preheater according to claim 1, characterized in that: One end of the fan-shaped sealing plate (64) contacts the surface of the central column (3), and the other end of the fan-shaped sealing plate (64) is flush with the outer side of the outer cylinder (5).

3. The sealing assembly for an air preheater according to claim 1, characterized in that: The bottom and the bottom of the partition (4) are both fixedly mounted with contact round heads (41), and the bottom of the fan-shaped sealing plate (64) is provided with a nearly rounded corner (641).

4. The sealing assembly for an air preheater according to claim 1, characterized in that: Two sealing rings (7) are fixedly mounted on the surface of the outer cylinder (5), and two sealing grooves (8) matching the sealing rings (7) are fixedly mounted on the inner side wall of the outer shell (1).

5. The sealing assembly for an air preheater according to claim 4, characterized in that: A rotating gear (9) is fixedly mounted on the surface of the outer cylinder (5), and the rotating gear (9) is located between the two sealing rings (7).

6. The sealing assembly for an air preheater according to claim 5, characterized in that: A mounting box (10) is fixedly mounted on the surface of the housing (1), and a driving gear (13) meshing with the rotating gear (9) is arranged inside the mounting box (10).

7. The sealing assembly for an air preheater according to claim 6, characterized in that: A reducer (11) is fixedly mounted on the top of the installation box (10), a rotating motor (12) whose output end is fixedly connected to the input end of the reducer (11) is fixedly mounted on the top of the reducer (11), and the output end of the reducer (11) is fixedly connected to the rotating shaft of the driving gear (13).

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