Static sealing structure for preventing dust accumulation and air leakage of sector plate for rotary heat exchanger

Abstract

The utility model relates to the technical field of rotary heat exchangers, and discloses a static sealing structure for preventing dust accumulation and air leakage of a sector plate of a rotary heat exchanger, which comprises a truss, the bottom of the truss is fixedly connected with a double 90-degree bending plate, and the surface of the double 90-degree bending plate is slidably connected with an L-shaped connecting plate. When the distance between a fan-shaped plate and a truss needs to be adjusted, the fan-shaped plate drives an L-shaped connecting plate to slide along the surface of a double-90-degree bending plate and a mouth-shaped avoiding groove, meanwhile, the fan-shaped plate drives a second clamping plate, the second clamping plate drives a sliding plate, and the sliding plate slides along the surface of a back plate and the surface of an upper cover plate; therefore, when the fan-shaped plate drives the L-shaped connecting plate to be limited by the double 90-degree bending plates, the two sides of the L-shaped connecting plate play a static sealing role under the blocking of the sliding plate, the upper cover plate and the back plate, and due to the connecting mode of the sliding structure, breakage caused by metal fatigue is avoided after long-time use, and the service life of the sliding structure is prolonged. Therefore, the stability and the sealing effect between the sector plate and the truss are improved.

Description

Technical Field

[0001] This utility model relates to the field of static sealing structure technology, and in particular to a static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger. Background Technology

[0002] A rotary air preheater is a rotating device that requires a certain gap between its moving and stationary parts. Simultaneously, a pressure difference exists between the air and the flue gas, causing air to leak into the flue gas through these gaps—a phenomenon known as air leakage. This leakage not only reduces equipment efficiency but can also, in severe cases, affect the safe operation of the preheater. Therefore, to reduce air leakage, ensure preheater performance, and extend its service life, it is necessary to improve the existing static sealing structure of the rotary air preheater.

[0003] In existing rotary air preheaters, the static sealing structure uses a corrugated expansion joint type, arranged on both sides of the sector plate. After adjusting the sealing gap between the sector plate and the sealing sheet on site, the static seal is welded to the sector plate and the central truss. Because the expansion joint faces the flue gas and air side, it is easily worn. Therefore, the thickness of the expansion joint is often as high as 3mm. This results in a large force for the expansion joint to expand and contract, requiring a large force to adjust the sector plate. Secondly, although the thickness of the expansion joint reaches 3mm, in actual application, after being scoured by flue gas, obvious wear often begins to appear on both sides, and even ash leakage occurs. After long-term operation, ash accumulation inside the sector plate becomes serious, leading to increased load on the sector plate and difficulty in lifting. In addition, damage to the static seal also causes an increase in the air preheater's air leakage rate. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger.

[0005] This utility model is achieved using the following technical solution: a static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger, comprising a truss, a double 90° bent plate fixedly connected to the bottom of the truss, an L-shaped connecting plate slidably connected to the surface of the double 90° bent plate, a fan-shaped plate fixedly connected to the left side of the L-shaped connecting plate, a back plate fixedly connected to the bottom of the truss, a clamping plate one fixedly connected to the right side of the back plate, an upper cover plate fixedly connected to the right side of the clamping plate one, a sliding plate slidably connected to the surface of the upper cover plate, a clamping plate two fixedly connected to the end of the sliding plate away from the upper cover plate, the left side of the clamping plate two fixedly connected to the right side of the L-shaped connecting plate, an avoidance groove provided between the sliding plate and the clamping plate one, an opening-shaped avoidance groove provided between the double 90° bent plate and the L-shaped connecting plate, an avoidance groove two provided between the clamping plate two and the back plate, and an opening-shaped guide groove provided between the back plate and the double 90° bent plate.

[0006] As a further improvement to the above solution, the outer wall of the back plate is slidably connected to the surface of the L-shaped connecting plate, and the outer wall of the sliding plate is slidably connected to the surface of the back plate.

[0007] As a further improvement to the above solution, the outer wall of the sliding plate is slidably connected to the inner wall of the clearance groove, the outer wall of the L-shaped connecting plate is slidably connected to the inner wall of the mouth-shaped clearance groove, and the outer wall of the second clamping plate is slidably connected to the inner wall of the second clearance groove.

[0008] With the above technical solution, when it is necessary to adjust the distance between the sector plate and the truss, the sector plate drives the L-shaped connecting plate to slide along the surface of the double 90° bent plate and the orifice clearance groove. At the same time, the sector plate drives the clamping plate two, and the clamping plate two drives the sliding plate, so that the sliding plate slides along the surface of the back plate and the upper cover plate.

[0009] As a further improvement to the above solution, two double 90° bending plates are provided, and the two double 90° bending plates are symmetrically arranged with the fan-shaped plate as the center. Two L-shaped connecting plates are provided, and the two L-shaped connecting plates are symmetrically arranged with the fan-shaped plate as the center.

[0010] As a further improvement to the above solution, two back plates are provided, and the two back plates are symmetrically arranged with the fan-shaped plate as the center. Two clamping plates are also provided, and the two clamping plates are symmetrically arranged with the fan-shaped plate as the center.

[0011] As a further improvement to the above solution, two upper cover plates are provided, which are symmetrically arranged with the fan-shaped plate as the center; two sliding plates are provided, which are symmetrically arranged with the fan-shaped plate as the center; and two clamping plates are provided.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention, when the distance between the sector plate and the truss needs to be adjusted, causes the sector plate to slide along the surface of the double 90° bent plate and the orifice clearance groove, while simultaneously causing the second clamping plate to slide along the surface of the back plate and the upper cover plate. This allows the sector plate and the L-shaped connecting plate to be limited by the double 90° bent plate, while the two sides are statically sealed by the sliding plate, the upper cover plate, and the back plate. This sliding connection method will not break due to metal fatigue during long-term use, thus increasing the stability and sealing effect between the sector plate and the truss.

[0014] This utility model uses an internal and external static sealing structure. The internal structure is a double-bent plate labyrinth structure, while the external structure is a combined steel plate labyrinth sealing structure. When the external airflow and dust slide along the sliding part between the sliding plate and the upper cover plate towards the avoidance groove, the airflow inside the avoidance groove slides through the sliding part between the back plate and the upper cover plate into the avoidance groove. Then, it flows into the upper orifice-shaped guide groove through the sliding part between the back plate and the L-shaped connecting plate. Thus, the combined steel plate labyrinth sealing structure effectively improves the sealing performance. The multiple paths increase the resistance to the flow of the medium, making the sealing effect more stable and reliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the sector-shaped plate of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram of section A in the middle;

[0018] Figure 4 This is a schematic diagram of the second structure of the clamping plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the side structure of the back plate of this utility model.

[0020] Explanation of key symbols:

[0021] 1. Truss; 2. Double 90° bent plate; 3. L-shaped connecting plate; 4. Fan-shaped plate; 5. Back plate; 6. Clamp plate one; 7. Upper cover plate; 8. Sliding plate; 9. Clamp plate two; 10. Clearance groove; 11. Orifice-shaped clearance groove; 12. Clearance groove two; 13. Orifice-shaped guide groove. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figure 1-5This embodiment provides a static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger. It includes a truss 1, with a double 90° bent plate 2 fixedly connected to the bottom of the truss 1. An L-shaped connecting plate 3 is slidably connected to the surface of the double 90° bent plate 2. A fan-shaped plate 4 is fixedly connected to the left side of the L-shaped connecting plate 3. A back plate 5 is fixedly connected to the bottom of the truss 1. A clamping plate 6 is fixedly connected to the right side of the back plate 5. An upper cover plate 7 is fixedly connected to the right side of the clamping plate 6. The upper cover plate 7... A sliding plate 8 is slidably connected to the surface. A clamping plate 9 is fixedly connected to the end of the sliding plate 8 away from the upper cover plate 7. The left side of the clamping plate 9 is fixedly connected to the right side of the L-shaped connecting plate 3. An avoidance groove 10 is provided between the sliding plate 8 and the clamping plate 6. An opening-shaped avoidance groove 11 is provided between the double 90° bent plate 2 and the L-shaped connecting plate 3. An avoidance groove 12 is provided between the clamping plate 9 and the back plate 5. An opening-shaped guide groove 13 is provided between the back plate 5 and the double 90° bent plate 2.

[0025] The outer wall of the back plate 5 is slidably connected to the surface of the L-shaped connecting plate 3, and the outer wall of the sliding plate 8 is slidably connected to the surface of the back plate 5.

[0026] The outer wall of the sliding plate 8 is slidably connected to the inner wall of the clearance groove 10, the outer wall of the L-shaped connecting plate 3 is slidably connected to the inner wall of the mouth-shaped clearance groove 11, and the outer wall of the clamping plate 2 9 is slidably connected to the inner wall of the clearance groove 2 12.

[0027] There are two double 90° bending plates 2, which are symmetrically arranged with the fan-shaped plate 4 as the center. There are also two L-shaped connecting plates 3, which are symmetrically arranged with the fan-shaped plate 4 as the center.

[0028] There are two back plates 5, which are symmetrically arranged with the fan-shaped plate 4 as the center. There are also two clamping plates 6, which are symmetrically arranged with the fan-shaped plate 4 as the center.

[0029] There are two upper cover plates 7, which are symmetrically arranged with the fan-shaped plate 4 as the center. There are two sliding plates 8, which are symmetrically arranged with the fan-shaped plate 4 as the center. There are two clamping plates 9.

[0030] The implementation principle of the static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger in this application embodiment is as follows: When it is necessary to adjust the distance between the fan-shaped plate 4 and the truss 1, the fan-shaped plate 4 drives the L-shaped connecting plate 3 to slide along the surface of the double 90° bent plate 2 and the orifice clearance groove 11. At the same time, the fan-shaped plate 4 drives the clamping plate 9, and the clamping plate 9 drives the sliding plate 8, so that the sliding plate 8 slides along the surface of the back plate 5 and the upper cover plate 7. Thus, while the fan-shaped plate 4 and the L-shaped connecting plate 3 are limited by the double 90° bent plate 2, the two sides achieve a static sealing effect under the obstruction of the sliding plate 8, the upper cover plate 7 and the back plate 5. This connection method of the structure will not break due to metal fatigue under long-term use, thereby increasing... The stability and sealing effect between the fan-shaped plate 4 and the truss 1 are improved. The entire static sealing structure is divided into two parts: the inner part adopts a double-bend plate labyrinth structure, and the outer part adopts a combined steel plate labyrinth sealing structure. When the external airflow and dust slide along the sliding part between the sliding plate 8 and the upper cover plate 7 towards the avoidance groove 10, the airflow inside the avoidance groove 10 will slide into the avoidance groove 12 through the sliding part between the back plate 5 and the upper cover plate 7, and then flow into the upper orifice guide groove 13 through the sliding part between the back plate 5 and the L-shaped connecting plate 3. Thus, the sealing performance is effectively improved by the combined steel plate labyrinth sealing structure. The multiple paths can increase the resistance of the medium flow, making the sealing effect more stable and reliable.

[0031] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plates of a rotary heat exchanger, characterized in that, Includes a truss (1), the bottom of which is fixedly connected to a double 90° bent plate (2), the surface of which is slidably connected to an L-shaped connecting plate (3), the left side of which is fixedly connected to a fan-shaped plate (4), the bottom of which is fixedly connected to a back plate (5), the right side of which is fixedly connected to a clamping plate (6), the right side of which is fixedly connected to an upper cover plate (7), the surface of which is slidably connected to a sliding plate (8), the sliding plate (8) 8) A clamping plate two (9) is fixedly connected to one end away from the upper cover plate (7). The left side of the clamping plate two (9) is fixedly connected to the right side of the L-shaped connecting plate (3). An avoidance groove (10) is provided between the sliding plate (8) and the clamping plate one (6). An opening-shaped avoidance groove (11) is provided between the double 90° bending plate (2) and the L-shaped connecting plate (3). An avoidance groove two (12) is provided between the clamping plate two (9) and the back plate (5). An opening-shaped guide groove (13) is provided between the back plate (5) and the double 90° bending plate (2).

2. The static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger as described in claim 1, characterized in that: The outer wall of the back plate (5) is slidably connected to the surface of the L-shaped connecting plate (3), and the outer wall of the sliding plate (8) is slidably connected to the surface of the back plate (5).

3. The static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger as described in claim 1, characterized in that: The outer wall of the sliding plate (8) is slidably connected to the inner wall of the clearance groove (10), the outer wall of the L-shaped connecting plate (3) is slidably connected to the inner wall of the mouth-shaped clearance groove (11), and the outer wall of the clamping plate (9) is slidably connected to the inner wall of the clearance groove (12).

4. The static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger as described in claim 1, characterized in that: There are two double 90° bending plates (2), and the two double 90° bending plates (2) are symmetrically arranged with the fan-shaped plate (4) as the center. There are two L-shaped connecting plates (3), and the two L-shaped connecting plates (3) are symmetrically arranged with the fan-shaped plate (4) as the center.

5. A static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger as described in claim 1, characterized in that: There are two back plates (5), and the two back plates (5) are symmetrically arranged with the fan-shaped plate (4) as the center. There are two clamping plates (6), and the two clamping plates (6) are symmetrically arranged with the fan-shaped plate (4) as the center.

6. The static sealing structure for preventing dust accumulation and air leakage in the fan-shaped plate of a rotary heat exchanger as described in claim 1, characterized in that: There are two upper cover plates (7), which are symmetrically arranged with the fan-shaped plate (4) as the center. There are two sliding plates (8), which are symmetrically arranged with the fan-shaped plate (4) as the center. There are two clamping plates (9).

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