Air pre-heater sealing device

Abstract

The utility model discloses a sealing device for an air pre-heater, which relates to the field of air pre-heaters, solves the problem that the sealing effect is affected as the existing spring type sealing device is easily corroded by smoke, and adopts the following scheme that the sealing device comprises a rotating plate, a clamping frame is clamped at the top of the rotating plate, and a sealing plate is clamped at the top side of the clamping frame; the top side of the sealing plate is tightly attached to the bottom face of the top of the air pre-heater. The clamping frame comprises a left plate body, a right plate body and a partition strip between the left plate body and the right plate body, a bottom groove matched with the rotating plate in specification is formed in the bottom side of the clamping frame, and a top groove matched with the sealing plate and an elastic gasket are arranged on the top side of the clamping frame. According to the air pre-heater sealing device, through the arrangement of the rotating plate structure and the arrangement of the clamping frame and the sealing plate on the rotating plate structure, the clamping frame can be conveniently assembled at the top end of the rotating plate, and the sealing plate can slide up and down by a certain amplitude during press fitting by utilizing the shape of the sealing plate and the arrangement of sleeving between the clamping frames, so that the sealing effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, specifically to an air preheater sealing device. Background Technology

[0002] The working principle of an air preheater is to exchange heat between hot flue gas and cold air. The hot flue gas temperature decreases, recovering heat for emission. The cold air temperature increases, gaining heat to aid combustion and save fuel. This requires the heat exchange channel to have good heat exchange efficiency. Furthermore, because the temperature of the hot flue gas is very high, exceeding 1000℃, and it is also highly corrosive, the heat exchanger's performance under high-temperature conditions is subject to high requirements. To meet these requirements, cast iron plates with temperature and corrosion resistance can be used as the material for the heat exchange components within the preheater.

[0003] A search revealed that patent application number 202221784200.7 discloses an air preheater sealing structure, relating to the technical field of air preheater sealing structures. This utility model includes a rotating roller, with a fixed frame at one end. A support plate is located inside the fixed frame, and a fixed plate is fixedly installed on one side of the support plate. A rotating groove is formed at the top of the fixed plate, and a rotating shaft is rotatably connected inside the rotating groove. A top plate is fixedly installed on the surface of the rotating shaft, and sealing gaskets are fixedly installed on both the rotating shaft and the rotating groove. When the ferrous material inside the air preheater deforms, the top plate rotates inside the rotating groove under the action of the rotating shaft. The adjusting rod, under the action of the second spring and in combination with the slider and connecting block, provides a certain thrust to the top plate, ensuring that the top plate remains tightly fitted to the interior of the air preheater.

[0004] The aforementioned application documents achieve corresponding sealing through the top plates and the springs they drive. However, firstly, the use of spring reset and repeated pressing may cause changes in the spring force coefficient, affecting the subsequent sealing effect. In addition, the external placement of the springs may be corroded by flue gas, affecting their service life.

[0005] Therefore, we propose an air preheater sealing device. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an air preheater sealing device that solves the problem that existing spring-type seals are susceptible to corrosion from flue gas, which affects their sealing performance.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: an air preheater sealing device, including a rotating plate, a frame is clamped on the top of the rotating plate, a sealing plate is clamped on the top side of the frame, and the top side of the sealing plate is in close contact with the bottom surface of the top of the air preheater.

[0008] The card frame includes two sets of plates on the left and right sides and a partition strip between them. The bottom side of the card frame is provided with a bottom groove that matches the specifications of the rotating plate. The top side of the card frame is provided with a top groove that matches the sealing plate. An elastic pad strip is installed at the bottom of the inner side of the top groove.

[0009] The sealing plate includes a card plate that is fitted into the top groove of the card frame and a top plate located on the top side of the card frame.

[0010] As a preferred embodiment of this utility model, the partition is a U-shaped frame strip, and an end plate adapted to the specifications of the partition is fixedly installed at the bottom of the card plate, and an elastic pad is pressed between the end plate and the partition.

[0011] When the top of the sealing plate contacts the top plate of the air preheater and is pressed down, the elastic gasket on its bottom side can be pressed to shrink it, thereby achieving a flexible pressing effect and ensuring a sealing effect at all times.

[0012] As a preferred embodiment of this utility model, the rotating plate has five sets of internal threaded holes arranged in a linear distribution, and the bottom side of the card frame has five sets of external threaded holes in opposite positions, and the internal threaded holes and external threaded holes are assembled together by fastening bolts.

[0013] The internal threaded hole, external threaded hole, and fastening bolt are assembled with a sealing gasket, which facilitates easy disassembly and assembly for subsequent maintenance and replacement.

[0014] As a preferred embodiment of this utility model, five sets of support columns are provided in the top groove on the top side of the card frame, and the card plate in the sealing plate is provided with a sleeve groove that is movably fitted on the outside of the support columns.

[0015] The design of the slot and support column facilitates the vertical movement of the sealing plate between the top sides of the frame, ensuring the adjustment effect.

[0016] As a preferred embodiment of this utility model, a spring piece is placed on the inner side of the sleeve groove between the inner wall of the sleeve groove and the support column, and the spring piece is a folded piece.

[0017] When the sealing plate is displaced under pressure, the elastic gasket contracts under pressure, and the spring sheet also contracts under pressure simultaneously. When resetting, the spring sheet can provide elastic force to drive the sealing plate to reset, thereby ensuring the self-adjusting effect and subsequent high-efficiency sealing.

[0018] This utility model provides a sealing device for an air preheater. It has the following beneficial effects:

[0019] This air preheater sealing device, through the design of the rotating plate structure and the arrangement of the clamping frame and sealing plate, facilitates the assembly of the clamping frame on the top of the rotating plate. Utilizing the shape of the sealing plate and the interlocking arrangement between the clamping frames, the sealing plate can slide vertically to a certain extent during press-fitting, thus ensuring a sealing effect. Furthermore, this structure is simple, the exposed structure is robust, has a long service life, and provides excellent subsequent sealing performance, solving the problem of existing spring-type seals being susceptible to corrosion from flue gas, which affects their sealing effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the rotating plate of this utility model;

[0022] Figure 3 This is a schematic diagram of the inner structure of the card frame of this utility model;

[0023] Figure 4 This is a schematic diagram of the sealing plate of this utility model.

[0024] In the diagram: 1. Turning plate; 11. Internal threaded hole; 2. Clip frame; 21. Spacer strip; 22. External threaded hole; 23. Support column; 3. Sealing plate; 31. Clip plate; 32. End plate; 33. Top plate; 34. Slot; 4. Fastening bolt; 5. Elastic washer strip; 6. Spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: an air preheater sealing device, including a rotating plate 1, a frame 2 clamped on the top of the rotating plate 1, a sealing plate 3 clamped on the top side of the frame 2, and the top side of the sealing plate 3 is tightly attached to the bottom surface of the top of the air preheater; the frame 2 includes two sets of plates on the left and right sides and a spacer 21 between them, a bottom groove adapted to the specifications of the rotating plate 1 is provided on the bottom side of the frame 2, a top groove adapted to the sealing plate 3 is provided on the top side of the frame 2, and an elastic pad 5 is clamped at the bottom of the inner side of the top groove; the sealing plate 3 includes a clamping plate 31 adapted to the specifications of the top groove in the frame 2 and a top plate 33 located on the top side of the frame 2;

[0027] The air preheater sealing device, through the setting of the rotating plate 1 structure and the setting of the clamping frame 2 and the sealing plate 3 on it, facilitates the assembly of the clamping frame 2 on the top of the rotating plate 1. By utilizing the shape of the sealing plate 3 and the fitting arrangement between the clamping frames 2, the sealing plate 3 can slide up and down to a certain extent during the pressing process, thereby ensuring the sealing effect. At the same time, the structure is simple, the structure exposed to the flue gas is relatively robust, the service life is long, and the subsequent sealing effect is good, which solves the problem that the existing spring-type seal is easily affected by the corrosion of flue gas, thus affecting the sealing effect.

[0028] Example 2:

[0029] The spacer 21 is a U-shaped frame strip. The bottom of the clamping plate 31 is fixedly installed with an end plate 32 that matches the specifications of the spacer 21, and an elastic pad 5 is pressed between the end plate 32 and the spacer 21. When the top of the sealing plate 3 contacts the top plate of the air preheater and is pressed down, the elastic pad 5 can be pressed on its bottom side to shrink it, thereby achieving a flexible pressing effect and ensuring the sealing effect at all times.

[0030] The rotating plate 1 has five sets of internal threaded holes 11 arranged in a linear pattern, and the bottom side of the frame 2 has five sets of external threaded holes 22 in opposite positions. The internal threaded holes 11 and the external threaded holes 22 are assembled with fastening bolts 4. The internal threaded holes 11, the external threaded holes 22 and the fastening bolts 4 are assembled with sealing gaskets. This arrangement facilitates easy disassembly and assembly for subsequent maintenance and replacement.

[0031] Five sets of support columns 23 are provided in the top groove on the top side of the card frame 2. The card plate 31 in the sealing plate 3 has a sleeve groove 34 that is movably fitted on the outside of the support column 23. The sleeve groove 34 and the support column 23 are provided to facilitate the sealing plate 3 to move up and down between the top sides of the card frame 2, so as to ensure the adjustment effect.

[0032] A spring piece 6 is placed inside the groove 34 between the inner wall of the groove 34 and the support column 23, and the spring piece 6 is a folded piece; when the sealing plate 3 is displaced by pressure, the elastic pad 5 is compressed and contracted, and the spring piece 6 is also compressed and contracted synchronously. When resetting, the spring piece 6 can provide elastic force to drive the sealing plate 3 to reset, thereby ensuring the self-adjustment effect and subsequent high-efficiency sealing.

[0033] The working principle and usage process of this utility model are as follows: When the device is required to work, it is installed on the top of the rotating plate 1. The sealing plate 3 is movably fitted on the top of the frame 2, which ensures that its top side is always in close contact with the top plate of the air preheater, thus ensuring a sealing effect. After the sealing plate 3 is pressed down, the elasticity of the elastic pad 5 and the spring 6 drives the sealing plate 3 to reset, ensuring a good sealing effect for a long time.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air preheater seal apparatus, characterized by: Including the rotating plate (1), the top of the rotating plate (1) is clamped with the clamping frame (2), the top side of the clamping frame (2) is clamped with the sealing plate (3), and the top side of the sealing plate (3) is tightly attached to the bottom surface of the top of the air preheater; The clamping frame (2) includes two groups of plate bodies and the partition strip (21) therebetween, the bottom side of the clamping frame (2) is provided with a bottom groove compatible with the specifications of the rotating plate (1), the top side of the clamping frame (2) is provided with a top groove compatible with the sealing plate (3), and the bottom of the inner side of the top groove is clamped with the elastic pad strip (5); The sealing plate (3) includes the clamping plate (31) clamped in the top groove compatible with the specifications of the clamping frame (2) and the top plate (33) located on the top side of the clamping frame (2).

2. A seal assembly for an air preheater as defined in claim 1, wherein: The partition strip (21) is a U-shaped frame strip, the bottom of the clamping plate (31) is fixedly installed with the end plate (32) compatible with the specifications of the partition strip (21), and the elastic pad strip (5) is pressed between the end plate (32) and the partition strip (21).

3. A seal assembly for an air preheater as defined in claim 1, wherein: Five groups of inner screw holes (11) are linearly distributed on the rotating plate (1), five groups of outer screw holes (22) are oppositely arranged on the bottom side of the clamping frame (2), and the inner screw holes (11) and the outer screw holes (22) are assembled through the fastening bolts (4).

4. A seal assembly for an air preheater as defined in claim 1, wherein: Five groups of struts (23) are arranged in the top groove on the top side of the clamping frame (2), and the clamping plate (31) in the sealing plate (3) is provided with a sleeve groove (34) movably sleeved on the outer side of the strut (23).

5. A seal for an air preheater as defined in claim 4 wherein: The inner side of the sleeve groove (34) is placed with the elastic sheet (6) between the inner wall of the sleeve groove (34) and the strut (23), and the elastic sheet (6) is a folded sheet.

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