Air pre-heater cold end pre-compression torque type sealing device

Abstract

The utility model discloses an air pre-heater cold end pre-compression torque type sealing device which comprises a cold end sector plate, a through hole is formed in the top of the cold end sector plate, a rotor partition plate is installed in an air pre-heater above the cold end sector plate, and the outer wall of the rotor partition plate is fixedly connected with a pre-compression plate and a back plate through second bolts. A thin sealing piece is installed on the outer wall of the bottom end of the pre-pressing plate through a pressing bolt, the thin sealing piece is elastic, and the outer wall of the bottom of the thin sealing piece is in sealing elastic connection with a through hole in the top of the cold end sector plate. The thin sealing piece cannot be blown down due to the pressure of air leakage on the acting surface of the thin sealing piece, a negative gap is reserved between the thin sealing piece and the cold-end fan-shaped plate during cold-state installation, the thin sealing piece and the cold-end fan-shaped plate can still be always in contact and have no gap during hot-state operation, and the zero-air-leakage effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheater sealing devices, in particular to a cold end pre-pressure moment sealing device of an air preheater. Background Art

[0002] When the rotary air preheater is running in hot state, the rotor will produce mushroom-shaped thermal deformation. For the radial direction of the cold end of the air preheater, the traditional technology is to install a hard sealing plate on the rotor partition. When the partition produces thermal deformation, the sealing plate will also deform along with it. The gap value between the deformed rotor partition and the cold end fan plate will change. Generally, as the load of the unit increases, the deformation of the air preheater will also increase, so its gap will become smaller and smaller, and the air leakage rate will show an overall downward trend. However, due to the variable load of the unit, the deformation of the air preheater is also variable. At low load, the air leakage gap here is larger, and the air leakage here cannot be controlled, which will cause the air preheater leakage rate to increase. Utility Model Content

[0003] The purpose of the utility model is to provide a pre-pressure moment sealing device for the cold end of an air preheater to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A cold-end preload moment sealing device for an air preheater comprises a cold-end sector plate, a through hole being provided at the top of the cold-end sector plate, a rotor partition being installed in the air preheater above the cold-end sector plate, and is characterized in that the outer wall of the rotor partition is fixedly connected to the preload plate and the back plate by a second bolt, a thin sealing sheet is installed on the outer wall of the bottom end of the preload plate by a tightening bolt, the thin sealing sheet is provided with elasticity, and the bottom outer wall of the thin sealing sheet is elastically connected to the through hole at the top of the cold-end sector plate in a sealing manner.

[0006] In a preferred embodiment of the present invention, the back plate is a first back plate, and the thin sealing sheet is a first thin sealing sheet.

[0007] In a preferred embodiment of the present invention, the back plate is a second back plate, and the thin sealing sheet is a second thin sealing sheet.

[0008] In a preferred embodiment of the present invention, bolt holes are provided on the inner wall of the rotor partition, a first baffle is provided on the left outer wall of the rotor partition, and a cold end old hard sealing piece is fitted on the right outer wall of the rotor partition.

[0009] In a preferred embodiment of the present invention, the cold end old hard sealing plate is sealed with the rotor partition, the right outer wall of the rotor partition is affixed with a pre-compression plate, the outer wall of the pre-compression plate is affixed with a first back plate, and the first back plate is set to be L-shaped.

[0010] In a preferred embodiment of the present invention, the outer wall of the first back plate is adhered with a second baffle and a sealing gasket, and the first baffle, the cold end old hard sealing plate, the pre-compression plate, the first back plate, the second baffle and the sealing gasket are fixedly connected by second bolts and nuts.

[0011] In a preferred embodiment of the present invention, the first thin sealing sheet is configured to be C-shaped, the top outer wall of the first thin sealing sheet is elastically connected to the bottom outer wall of the first back plate, and a negative gap is reserved between the bottom outer wall of the first thin sealing sheet and the cold end fan plate.

[0012] In a preferred embodiment of the present invention, the cold end old hard sealing plate is sealed with the rotor partition, the right outer wall of the rotor partition is affixed with a pre-load plate, the outer wall of the pre-load plate is affixed with a second back plate, the second back plate is arranged in a Z shape, and the inner wall of the right end of the second back plate is fixedly installed on the top of the cold end fan plate by bolts.

[0013] In a preferred embodiment of the present invention, the outer wall of the second back plate is adhered with a second baffle and a sealing gasket, and the first baffle, the cold end old hard sealing plate, the pre-compression plate, the second back plate, the second baffle and the sealing gasket are fixedly connected by second bolts and nuts.

[0014] In a preferred embodiment of the present invention, the second thin sealing sheet is configured to be heart-shaped, the top outer wall of the second thin sealing sheet is elastically connected to the bottom outer wall of the second back plate, and a negative gap is reserved between the bottom outer wall of the second thin sealing sheet and the cold end fan plate.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention.

[0016] 1. By preloading the thin sealing sheet with torque, the thin sealing sheet can always maintain a fixed torque and will not be blown down by the pressure of the action surface caused by air leakage. When installed in a cold state, a negative gap is reserved between the thin sealing sheet and the cold end fan plate. When running in a hot state, the thin sheet and the cold end fan plate can still maintain contact at all times without gaps, achieving the effect of zero air leakage;

[0017] 2. By setting the thin sealing sheet to a C shape, installing a back plate on the top of the first thin sealing sheet 9, and using it in conjunction with the pre-compression plate, the thin sealing sheet can achieve a good dynamic sealing effect on the cold end sector plate after installation, thereby improving the stability of the equipment;

[0018] 3. The flexible sealing sheet and the cold end sector plate always keep in contact, with no sealing gap, zero air leakage and excellent sealing effect;

[0019] 4. Can adapt to various working conditions of the unit and maintain constant efficiency;

[0020] 5. It has certain scalability and is easy to assemble and disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the docking structure between a thin sealing sheet and a cold end sector plate in a pre-pressure moment sealing device at the cold end of an air preheater;

[0023] Figure 2 This is a schematic diagram of the working structure of a thin sealing sheet in a pre-pressure moment sealing device at the cold end of an air preheater;

[0024] Figure 3 This is a schematic diagram of the installation structure of the second thin sealing sheet in a pre-pressure moment sealing device at the cold end of an air preheater.

[0025] In the figure: rotor diaphragm 1, first baffle 2, cold end old hard sealing sheet 3, pre-compression plate 4, first back plate 5, second baffle 6, second bolt 7, nut 8, first thin sealing sheet 9, tightening bolt 10, cold end sector plate 11, second back plate 12, second thin sealing sheet 13. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] Example 1: Figure 1 and 2 , including a cold end sector plate 11, a through hole is opened on the top of the cold end sector plate 11, a rotor partition plate 1 is installed in the air preheater above the cold end sector plate 11, the outer wall of the rotor partition plate 1 is fixedly connected to the preload plate 4 and the first back plate 5 by the second bolt 7, and a thin sealing sheet is installed on the outer wall of the bottom end of the preload plate 4 by a tightening bolt 10. The thin sealing sheet is elastic, and the bottom outer wall of the thin sealing sheet is sealed and elastically connected to the through hole at the top of the cold end sector plate 11.

[0028] The specific usage scenario of this embodiment is: by setting a pre-stressing plate 4 for installing a thin sealing sheet, the thin sealing sheet can be installed above the cold end fan plate 11, so that the bottom of the thin sealing sheet can be softly sealed with the through hole on the surface of the cold end fan plate 11, so that when the cold end fan plate 11 is deformed, the thin sealing sheet on the top of the cold end fan plate 11 can be deformed synchronously with the deformation of the cold end fan plate 11, thereby sealing the top through hole of the cold end fan plate 11, so that the pre-stressing plate 4 and the thin sealing sheet are used together to achieve a double sealing effect, and a first back plate 5 is set to apply pressure to the top of the thin sealing sheet, so that the thin sealing sheet can seal the top of the cold end fan plate 11.

[0029] Example 2: Figure 1 and Figure 2 , including a cold end fan-shaped plate 11, a through hole is opened on the top of the cold end fan-shaped plate 11, a rotor partition 1 is installed in the air preheater above the cold end fan-shaped plate 11, the outer wall of the rotor partition 1 is fixedly connected to the preload plate 4 and the first back plate 5 by a second bolt 7, a thin sealing sheet is installed on the outer wall of the bottom end of the preload plate 4 by a tightening bolt 10, the thin sealing sheet is provided with elasticity, and the outer wall of the bottom of the thin sealing sheet is sealed and elastically connected to the through hole at the top of the cold end fan-shaped plate 11, a bolt hole is opened on the inner wall of the rotor partition 1, and the outer wall on the left side of the rotor partition 1 is provided with a first stop Plate 2, the right outer wall of the rotor partition 1 is fitted with the cold end old hard sealing piece 3, the cold end old hard sealing piece 3 and the rotor partition 1 are sealed, the right outer wall of the rotor partition 1 is fitted with a pre-load plate 4, the outer wall of the pre-load plate 4 is fitted with a first back plate 5, the first back plate 5 is set to be L-shaped, the outer wall of the first back plate 5 is fitted with a second baffle 6 and a sealing gasket, the first baffle 2, the cold end old hard sealing piece 3, the pre-load plate 4, the first back plate 5, the second baffle 6 and the sealing gasket are fixedly connected by the second bolt 7 and the nut 8.

[0030] The specific usage scenario of this embodiment is: by setting the first baffle 2 and the cold end old hard sealing sheet 3 to be used in conjunction to seal the left outer wall of the rotor partition 1, by setting the second baffle 6 to be used to press the outer wall of the pre-compression plate 4 and the first back plate 5, a sealing effect is achieved, thereby improving the stability of the structure for installing the first thin sealing sheet 9.

[0031] Example 3: Figure 1 and Figure 2, including a cold end sector plate 11, a through hole is opened at the top of the cold end sector plate 11, a rotor partition plate 1 is installed in the air preheater above the cold end sector plate 11, the outer wall of the rotor partition plate 1 is fixedly connected to the preload plate 4 and the first back plate 5 by a second bolt 7, and the outer wall of the bottom end of the preload plate 4 is installed with a first thin sealing sheet 9 by a tightening bolt 10. The first thin sealing sheet 9 is provided with elasticity, and the bottom outer wall of the first thin sealing sheet 9 is sealed and elastically connected to the through hole at the top of the cold end sector plate 11. The first thin sealing sheet 9 is set to be C-shaped, and the top outer wall of the first thin sealing sheet 9 is elastically connected to the bottom outer wall of the first back plate 5, and a negative gap is reserved between the bottom outer wall of the first thin sealing sheet 9 and the cold end sector plate 11.

[0032] The specific usage scenario of this embodiment is: by setting a negative gap between the outer wall of the bottom end of the first thin sealing sheet 9 and the cold end fan plate 11, it is convenient for the cold end fan plate 11 to maintain a good sealing effect on the top of the cold end fan plate 11 when switching between cold and hot states.

[0033] The working principle of the present invention is: when in use, a technician in this field fits the first baffle 2 on the left outer wall of the rotor partition 1, and then fits the first baffle 2 on the outer wall of the cold end old hard sealing piece 3, and fixes the pre-compression plate 4 and the first thin sealing piece 9 through the tightening bolts 10, and then installs the pre-compression plate 4 and the first back plate 5 on the right side of the rotor partition 1, and then fixes the first baffle 2, the cold end old hard sealing piece 3, the pre-compression plate 4, the first back plate 5, and the second baffle 6 on the outer walls on both sides of the rotor partition 1 through the second bolts 7 and nuts 8, and fixes the first thin sealing piece 9 so that the top end of the first thin sealing piece 9 is elastically connected with the outer wall of the bottom end of the first back plate 5. When installed in a cold state, a negative gap is reserved between the thin piece and the cold end fan plate. During hot operation, the thin piece and the cold end fan plate can still maintain contact at all times without a gap, thereby achieving the effect of zero air leakage.

[0034] Example 4: Figure 1 and Figure 3 The old hard sealing piece 3 at the cold end is sealed with the rotor partition 1, the outer wall of the right side of the rotor partition 1 is fitted with a pre-load plate 4, and the outer wall of the pre-load plate 4 is fitted with a second back plate 12. The second back plate 12 is set to a Z shape, and the inner wall of the right end of the second back plate 12 is fixedly installed on the top of the cold end sector plate 11 by bolts. The outer wall of the second back plate 12 is fitted with a second baffle 6 and a sealing gasket. The first baffle 2, the old hard sealing piece 3 at the cold end, the pre-load plate 4, the second back plate 12, the second baffle 6 and the sealing gasket are fixedly connected by second bolts 7 and nuts 8. The second thin sealing piece 13 is set to a heart shape, and the outer wall of the top end of the second thin sealing piece 13 is elastically connected with the outer wall of the bottom end of the second back plate 12. A negative gap is reserved between the outer wall of the bottom end of the second thin sealing piece 13 and the cold end sector plate 11.

[0035] The working principle of the present invention is: when in use, a technician in this field fits the first baffle 2 on the left outer wall of the rotor partition 1, and then fits the first baffle 2 on the outer wall of the cold end old hard sealing piece 3, and fixes the pre-compression plate 4 and the second thin sealing piece 13 through the tightening bolt 10, and then installs the pre-compression plate 4 and the second back plate 12 on the right side of the rotor partition 1, and then fixes the first baffle 2, the cold end old hard sealing piece 3, the pre-compression plate 4, the second back plate 12, and the second baffle 6 on the outer walls on both sides of the rotor partition 1 through the second bolts 7 and nuts 8, and fixes the second thin sealing piece 13 so that the top end of the second thin sealing piece 13 is elastically connected with the outer wall of the bottom end of the second back plate 12. When installed in a cold state, a negative gap is reserved between the thin sheet and the cold end fan plate. During hot operation, the thin sheet and the cold end fan plate can still maintain contact at all times without a gap, thereby achieving the effect of zero air leakage.

[0036] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air preheater cold end preload moment sealing device, comprising a cold end sector plate (11), a through hole is opened on the top of the cold end sector plate (11), a rotor partition plate (1) is installed in the air preheater above the cold end sector plate (11), characterized in that: The outer wall of the rotor partition (1) is fixedly connected to the pre-stressing plate (4) and the back plate by a second bolt (7); a thin sealing sheet is installed on the outer wall of the bottom end of the pre-stressing plate (4) by a clamping bolt (10); the thin sealing sheet is provided with elasticity; the bottom outer wall of the thin sealing sheet is elastically sealed and connected to the through hole at the top of the cold end fan-shaped plate (11).

2. The air preheater cold end preload moment sealing device according to claim 1, characterized in that: The back plate is a first back plate (5), and the thin sealing sheet is a first thin sealing sheet (9).

3. The air preheater cold end preload moment sealing device according to claim 1, characterized in that: The back plate is a second back plate (12), and the thin sealing sheet is a second thin sealing sheet (13).

4. The air preheater cold end preload moment sealing device according to claim 2, characterized in that: The inner wall of the rotor partition (1) is provided with bolt holes, the left outer wall of the rotor partition (1) is provided with a first baffle (2), and the right outer wall of the rotor partition (1) is fitted with a cold end old hard sealing sheet (3).

5. The air preheater cold end preload moment sealing device according to claim 4, characterized in that: The cold end old hard sealing sheet (3) is sealedly connected to the rotor partition (1), the right outer wall of the rotor partition (1) is fitted with a pre-compression plate (4), the outer wall of the pre-compression plate (4) is fitted with a first back plate (5), and the first back plate (5) is arranged in an L shape.

6. The air preheater cold end preload moment sealing device according to claim 5, characterized in that: The outer wall of the first back plate (5) is fitted with a second baffle plate (6) and a sealing gasket, and the first baffle plate (2), the cold end old hard sealing sheet (3), the pre-compression plate (4), the first back plate (5), the second baffle plate (6) and the sealing gasket are fixedly connected by means of second bolts (7) and nuts (8).

7. The air preheater cold end preload moment sealing device according to claim 6, characterized in that: The first thin sealing sheet (9) is configured to be C-shaped, the top outer wall of the first thin sealing sheet (9) is elastically connected to the bottom outer wall of the first back plate (5), and a negative gap is reserved between the bottom outer wall of the first thin sealing sheet (9) and the cold end fan-shaped plate (11).

8. The air preheater cold end preload moment sealing device according to claim 7, characterized in that: The cold end old hard sealing sheet (3) is sealed to the rotor partition (1), the outer wall of the pre-compression plate (4) is fitted with a second back plate (12), the second back plate (12) is arranged in a Z shape, and the inner wall of the right end of the second back plate (12) is fixedly mounted on the top of the cold end sector plate (11) by means of bolts.

9. The air preheater cold end preload moment sealing device according to claim 8, characterized in that: The second baffle plate (6) and the sealing gasket are attached to the outer wall of the second back plate (12), and the first baffle plate (2), the cold end old hard sealing sheet (3), the pre-compression plate (4), the second back plate (12), the second baffle plate (6) and the sealing gasket are fixedly connected by means of second bolts (7) and nuts (8).

10. The air preheater cold end preload moment sealing device according to claim 3, characterized in that: The second thin sealing sheet (13) is configured to be heart-shaped, the top outer wall of the second thin sealing sheet (13) is elastically connected to the bottom outer wall of the second back plate (12), and a negative gap is reserved between the bottom outer wall of the second thin sealing sheet (13) and the cold end fan-shaped plate (11).

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