A fan-shaped plate sealing structure and a retrofit method

Abstract

The application provides a fan-shaped plate sealing structure and a modification method. The sealing structure comprises a fan-shaped plate, a static sealing structure and a tail sealing structure. The static sealing structure is arranged on both sides of the fan-shaped plate in the radial direction. The tail sealing structure is arranged on the arc-shaped tail of the fan-shaped plate in the axial direction. The static sealing structure comprises a corrugated static sealing structure. The tail sealing structure comprises a sealing plate, a sealing sheet and a mounting plate. The sealing plate is arranged on the side of the arc-shaped tail of the fan-shaped plate opposite to the rigid ring. One end of the sealing sheet is movably connected with the sealing plate, and the other end of the sealing sheet is connected with the mounting plate. The mounting plate is connected with the rigid ring. The fan-shaped plate sealing structure has good sealing performance and high stability, and can effectively prevent the occurrence of the up-and-down operation jamming and internal dust accumulation of the fan-shaped plate.

Description

Technical Field

[0001] This invention relates to the field of sector plate sealing technology, specifically to a sector plate sealing structure and modification method. Background Technology

[0002] An air preheater is a preheating device that improves the heat exchange performance of a boiler and reduces heat loss. The function of an air preheater is to transfer the heat carried by the flue gas discharged from the boiler tail flue to the air entering the boiler through heat sinks, preheating the air to a certain temperature.

[0003] Currently, most fan-shaped plates in air preheaters adopt a welded static sealing structure. This structure utilizes the friction gap between two steel plates welded to the fan-shaped plate and the fixed structure to achieve a sealing effect. This type of static sealing structure requires high precision in on-site installation. If the on-site installation is not precise, it can easily cause jamming during the up-and-down movement of the fan-shaped plate, leading to failure of the fan-shaped plate loading mechanism. Furthermore, although the welded static sealing structure can prevent most dust from entering the fan-shaped plate, it cannot provide an absolute seal. After prolonged use, dust accumulation inside the fan-shaped plate becomes severe. When the dust accumulation reaches a certain level, it will clump together, hindering the operation of the fan-shaped plate and causing failure of related mechanical systems. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the purpose of this invention is to provide a sector plate sealing structure and modification method. This sector plate sealing structure has good sealing performance and high stability, and can effectively prevent the sector plate from jamming during its up and down movement and the occurrence of internal dust accumulation.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] According to a first aspect of the embodiments of this application, a sector-shaped plate sealing structure is provided, including a sector-shaped plate, a static sealing structure, and a tail sealing structure; the static sealing structure is disposed on both sides of the sector-shaped plate in the radial direction, and the tail sealing structure is disposed on the arc-shaped tail of the sector-shaped plate in the axial direction.

[0007] The static sealing structure includes a corrugated static sealing structure;

[0008] The tail sealing structure includes a sealing plate, a sealing sheet, and a mounting plate. The sealing plate is disposed on the side of the arc-shaped tail of the sector plate opposite to the rigid ring. One end of the sealing sheet is movably connected to the sealing plate, and the other end is connected to the mounting plate. The mounting plate is connected to the rigid ring.

[0009] Furthermore, the static sealing structure also includes a fixed static sealing plate, which is disposed at both ends of the corrugated static sealing structure.

[0010] Furthermore, the sealing sheet is composed of two layers of sub-sealing sheets stacked alternately.

[0011] Furthermore, each of the two fixed static sealing plates has an end plate on one side opposite to the other, and each of the two end plates has a chamber on one side opposite to the other.

[0012] Furthermore, a slider is provided on one side of the corrugated static sealing structure, and the slider slides within the cavity.

[0013] Furthermore, the chamber includes a cover plate and side plates, with the cover plate disposed on one side opposite to the two side plates.

[0014] Furthermore, a protective sleeve is provided on the corrugated static sealing structure.

[0015] Furthermore, a fixing structure is provided at the upper end of the static sealing structure, and a reference plate is provided at the lower end face of the fixing structure, the reference plate being in contact with the static sealing structure.

[0016] According to a second aspect of the embodiments of this application, a method for modifying a sector-shaped plate sealing structure is provided, comprising:

[0017] Remove the first original static sealing structure on the lower end face of the fixed structure and the second original static sealing structure on both sides of the sector plate, clean the tail of the sector plate, and adjust the sector plate to its initial position;

[0018] Assemble the tail sealing structure, which includes a sealing plate, a sealing sheet, and a mounting plate. First, place one end of the sealing sheet against the upper end of the sealing plate, and then connect the other end to the mounting plate.

[0019] The assembled tail sealing structure is placed in the tail space of the sector plate, and the mounting plate is connected to the rigid ring.

[0020] Static sealing structures are installed on both sides of the sector plate, and the static sealing structures include corrugated static sealing structures.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The sector plate sealing structure provided by the present invention enhances the stability of the sector plate sealing structure by setting corrugated static sealing structures and tail sealing structures on both sides and the tail of the sector plate respectively, thereby improving the sealing performance and sealing stability of the sector plate and effectively preventing jamming during the up and down movement of the sector plate and the occurrence of internal dust accumulation.

[0023] The method for modifying the sector-shaped plate sealing structure provided by the present invention is achieved through the aforementioned sector-shaped plate sealing structure and includes the technical solution of the aforementioned sector-shaped plate sealing structure, thus having corresponding technical effects. Attached Figure Description

[0024] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0025] Figure 1 A schematic diagram of a sector-shaped plate static sealing structure provided for the prior art;

[0026] Figure 2 A partial schematic diagram of a sector-shaped plate static sealing structure provided for the prior art;

[0027] Figure 3 This is a partial schematic diagram of a fan-shaped plate static sealing structure provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a sector plate in its initial position, provided by an embodiment of the present invention.

[0029] Figure 5 This is a partial schematic diagram of a sector-shaped plate sealing structure provided in an embodiment of the present invention;

[0030] Figure 6 This is a partially enlarged schematic diagram of a sector-shaped plate sealing structure provided in an embodiment of the present invention;

[0031] Figure 7 This is a cross-sectional schematic diagram of a fan-shaped plate static sealing structure provided in an embodiment of the present invention;

[0032] Figure 8 This is a cross-sectional schematic diagram of a fan-shaped plate tail sealing structure provided in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of a fan-shaped plate static sealing structure provided in an embodiment of the present invention;

[0034] Figure 10 This is a partially enlarged schematic diagram of a fan-shaped plate static sealing structure provided in an embodiment of the present invention;

[0035] Figure 11 This is a schematic diagram of the structure of a sealing sheet provided in an embodiment of the present invention.

[0036] In the picture:

[0037] 1. Sector plate;

[0038] 2. Static sealing structure; 201. Corrugated static sealing structure; 202. Side plate; 203. Cover plate; 204. Slider; 205. Sheath; 206. End plate; 207. Fixed static sealing plate;

[0039] 3. Tail sealing structure; 301. Sealing plate; 302. Sealing disc; 3021. Sub-sealing disc; 303. Mounting plate; 3031. Rib plate; 304. Rigid ring; 305. Pressure plate;

[0040] 4. Fixed structure; 401. First original static sealing structure; 402. Reference plate;

[0041] 5. Second original static sealing structure;

[0042] 6. Guide plate. Detailed Implementation

[0043] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0044] Please see Figure 1-11 The present application provides a sector-shaped plate sealing structure, including a sector-shaped plate 1, a static sealing structure 2 and a tail sealing structure 3; the static sealing structure 2 is disposed on both sides of the sector-shaped plate 1 in the radial direction, and the tail sealing structure 3 is disposed on the arc-shaped tail of the sector-shaped plate 1 in the axial direction.

[0045] A fixed structure 4 is provided at the upper end of the static sealing structure 2. A reference plate 402 is provided at the lower end of the fixed structure 4. The reference plate 402 is in contact with the static sealing structure 2. The static sealing structure 2 includes a corrugated static sealing structure 201 and fixed static sealing plates 207. The fixed static sealing plates 207 are provided at both ends of the corrugated static sealing structure 201. An end plate 206 is provided on the opposite side of the two fixed static sealing plates 207. A chamber is provided on the opposite side of the two end plates 206. A slider 204 is provided on the lower side of the corrugated static sealing structure 201. The slider 204 slides in the chamber. The chamber includes a cover plate 203 and a side plate 202. The cover plate 203 is provided on the opposite side of the two side plates 202. Optionally, the side plate 202 is an L-shaped structure. A protective sleeve 205 is provided on the corrugated static sealing structure 201. The protective sleeve 205 is a U-shaped structure.

[0046] The tail sealing structure 3 includes a sealing plate 301, a sealing sheet 302, and a mounting plate 303. The sealing plate 301 is disposed on the side of the arc-shaped tail of the sector plate 1 opposite to the rigid ring 304. One end of the sealing sheet 302 is in contact with the upper end of the sealing plate 301 and the outer side of the sector plate 1, and the other end is connected to the mounting plate 303. A pressure plate 305 is also provided on the side of the sealing sheet 302 opposite to the sector plate 1. The sealing sheet 302 is mounted on the mounting plate 303 by the pressure plate 305 and bolts. The mounting plate 303 is connected to the rigid ring 304. The sealing sheet 302 consists of two layers of sub-sealing sheets 3021 stacked in an alternating manner. A rib 3031 is provided on the side of the mounting plate 303 opposite to the rigid ring 304. One side of the rib 3031 is connected to the mounting plate 303, and the upper side is connected to the rigid ring 304.

[0047] A guide plate 6 is also provided at the intersection of the static sealing structure 2 and the tail sealing structure 3. One end of the guide plate 6 is connected to the static sealing structure 2, and the other end is in contact with the tail sealing structure 3.

[0048] In this embodiment, when the sector plate 1 is running, the corrugated static sealing structure 201 on both sides of the sector plate 1, the fixed static sealing plate 207, and the end plate 206 constitute the sealing structure on the side of the sector plate 1. The slider 204 on the lower side of the corrugated sealing structure 201 slides in the cavity on the end plate 206. The tail sealing structure 3 at the tail of the sector plate 1 is tightly attached to the arc-shaped tail of the sector plate 1 under the elastic action of the sealing sheet 302, thus forming the tail sealing structure of the sector plate 1. By setting the static sealing structure 2 on both sides and the tail of the sector plate 1 respectively, the stability of the sector plate sealing structure is enhanced, the sealing performance and sealing stability of the sector plate 1 are improved, and the jamming phenomenon caused by the large static sealing friction resistance when the sector plate 1 moves up and down can be prevented, as well as the situation where the sector plate 1 is difficult to move up and down due to the accumulation of dust inside the sector plate 1 can be avoided.

[0049] Please see Figure 1-11 This application also provides a method for modifying a sector-shaped plate sealing structure, including:

[0050] Step S01: Remove the first original static sealing structure 401 on the lower end face of the fixed structure 4 and the second original static sealing structure 5 on both sides of the sector plate 1, and clean the tail of the sector plate 1; adjust the sector plate 1 to the initial position.

[0051] Step S02: Pre-assemble the tail sealing structure 3. First, the two layers of sub-sealing sheets 3021 are staggered and stacked to form a sealing sheet 302. Then, the sealing sheet 302 is installed on the mounting plate 303 through the pressure plate 305 and bolts. The reinforcing plate 3031 is installed on the side of the mounting plate 303 opposite to the sealing sheet 302.

[0052] Step S03: Initially install the tail sealing structure 3. First, install the sealing plate 301 on the outer side of the tail of the sector plate 1. Then, place the pre-assembled tail sealing structure 3 in the tail space of the sector plate 1. Place the end of the sealing piece 302 that is not connected to the mounting plate 303 against the upper end of the sealing plate 301. Then, fix the mounting plate 303 and the stiffener 3031 on the rigid ring 304.

[0053] Step S04: Install the reference plate 402 on the lower end face of the fixed structure 4;

[0054] Step S05: Install and fix static sealing plates 207 at preset positions on both sides of the fan-shaped plate 1, and set a guide plate 6 on the side of the fixed static sealing plate 207 near the tail sealing structure 3. Trim and adjust the tail sealing structure 3 according to the guide plate 6 so that both ends of the tail sealing structure 3 are in close contact with the guide plate 6.

[0055] Step S06: Test run sector plate 1. By moving sector plate 1 up and down, determine whether sector plate 1 has any abnormalities such as jamming. If so, make adjustments. If not, continue the modification.

[0056] Step S07: Using the reference plate 402 and the fixed static sealing plate 207 as references, fix the corrugated static sealing structure 201 so that the two ends of the corrugated static sealing structure 201 maintain a preset distance from the fixed static sealing plate 207 and are in close contact with the reference plate 402.

[0057] Step S08: Install end plates 206 at both ends of the corrugated static sealing structure 201, so that one side of the end plate 206 is in close contact with the corrugated static sealing structure 201 and the other side is fixedly connected to the fixed static sealing plate 207.

[0058] Step S09: Install slider 204 on the lower side of corrugated static sealing structure 201;

[0059] Step S10: Install a chamber on the end plate 206. The chamber includes a cover plate 203 and a side plate 202. The side plate 202 is fixedly connected to the end plate 206, and the cover plate 203 is fixedly connected to the side plate 202.

[0060] Step S11: Install a protective sleeve 205 on the outside of the corrugated static sealing structure 201 to ensure the end face sealing of the corrugated static sealing structure 201.

[0061] Through the above steps S01 to S11, the modification of the sector plate sealing structure is completed. The modified sector plate sealing structure has good sealing performance and high stability, and can effectively prevent the sector plate from jamming during its up and down movement and the occurrence of internal dust accumulation.

[0062] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A sector-shaped plate sealing structure, characterized in that, It includes a fan-shaped plate (1), a static sealing structure (2), and a tail sealing structure (3); the static sealing structure (2) is disposed on both sides of the fan-shaped plate (1) in the radial direction, and the tail sealing structure (3) is disposed on the arc-shaped tail of the fan-shaped plate (1) in the axial direction. The static sealing structure (2) includes a corrugated static sealing structure (201); the static sealing structure (2) also includes a fixed static sealing plate (207), which is disposed at both ends of the corrugated static sealing structure (201); an end plate (206) is disposed on the opposite side of the two fixed static sealing plates (207), and a chamber is disposed on the opposite side of the two end plates (206); a slider (204) is disposed on one side of the corrugated static sealing structure (201), and the slider (204) slides in the chamber; The tail sealing structure (3) includes a sealing plate (301), a sealing sheet (302), and a mounting plate (303). The sealing plate (301) is disposed on the side of the arc-shaped tail of the fan-shaped plate (1) opposite to the rigid ring (304). One end of the sealing sheet (302) is movably connected to the sealing plate (301), and the other end is connected to the mounting plate (303). The mounting plate (303) is connected to the rigid ring (304).

2. The sector-shaped plate sealing structure according to claim 1, characterized in that, The sealing sheet (302) is composed of two layers of sub-sealing sheets (3021) stacked in an alternating manner.

3. The sector-shaped plate sealing structure according to claim 1, characterized in that, The chamber includes a cover plate (203) and side plates (202), with the cover plate (203) disposed on one side opposite to the two side plates (202).

4. The sector-shaped plate sealing structure according to claim 1, characterized in that, A sheath (205) is provided on the corrugated static sealing structure (201).

5. The sector-shaped plate sealing structure according to any one of claims 1-4, characterized in that, The static sealing structure (2) is provided with a fixing structure (4) at its upper end, and a reference plate (402) is provided on the lower end face of the fixing structure (4), and the reference plate (402) is in contact with the static sealing structure (2).

6. A method for modifying a sector-shaped plate sealing structure, applied to the sector-shaped plate sealing structure as described in any one of claims 1-5, characterized in that, include: Remove the first original static sealing structure (401) on the lower end face of the fixed structure (4) and the second original static sealing structure (5) on both sides of the fan-shaped plate (1), clean the tail of the fan-shaped plate (1), and adjust the fan-shaped plate (1) to the initial position; Assemble the tail sealing structure (3), which includes a sealing plate (301), a sealing sheet (302), and a mounting plate (303). First, place one end of the sealing sheet (302) against the upper end of the sealing plate (301), and then connect the other end to the mounting plate (303). The assembled tail sealing structure (3) is placed in the tail space of the sector plate (1), and the mounting plate (303) is connected to the rigid ring (304); Static sealing structures (2) are installed on both sides of the sector plate (1), and the static sealing structures (2) include corrugated static sealing structures (201).

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