Air pre-heater hot end sealing device

Abstract

The utility model discloses an air pre-heater hot end sealing device which comprises a rotor partition plate, the rotor partition plate is connected with a sealing plate through a bolt and nut fastener, and the sealing plate comprises an upper supporting plate and a lower sealing plate. A sliding supporting seat is arranged at the bottom of the upper supporting plate, the top end of the lower sealing plate is inserted into the sliding supporting seat, and an elastic piece is arranged in an inner cavity of the sliding supporting seat. At the moment, the lower sealing plate is in elastic contact with the hot end fan-shaped plate, so that large noise cannot be generated; and when the lower sealing plate is subjected to upward force, the lower sealing plate extrudes the elastic piece, so that the lower sealing plate slightly moves upwards, violent collision between the lower sealing plate and the hot end fan-shaped plate cannot be caused, and the sealing effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater hot end sealing technical field, concretely is a kind of air preheater hot end sealing device. BACKGROUND

[0002] The hot end radial air leakage of rotary air preheater is also the main air leakage position of air preheater.The conventional hot end radial sealing is made of a thin steel plate, also called hard sealing sheet, which forms the radial sealing of hot end between the hard sealing sheet and the hot end sector plate. Figure 6 As shown in the figure: directly fix hard sealing sheet 100 on rotor baffle 1 by bolt nut fastener 2;The disadvantage of this structure is that, when the rotor is heated and expands downward during the hot-state operation of air preheater, the hard sealing sheet and the sector plate will collide, which will cause the air preheater to be stuck and unable to run safely and stably, so the gap between the hard sealing sheet and the sector plate must be reserved when the hot-state air preheater is not heated, but the gap is too large will cause air leakage, and the gap is too small will cause collision. SUMMARY

[0003] In view of the problems existing in the prior art air preheater hot end sealing device, the utility model is provided.

[0004] Therefore, the utility model aims at providing an air preheater hot end sealing device, which solves the problem that the conventional hot end radial sealing is made of a thin steel plate, also called hard sealing sheet, which forms the radial sealing of hot end between the hard sealing sheet and the hot end sector plate, and the rotor is heated and expands downward during the hot-state operation of air preheater, so the hard sealing sheet and the sector plate will collide, which will cause the air preheater to be stuck and unable to run safely and stably, so the gap between the hard sealing sheet and the sector plate must be reserved when the hot-state air preheater is not heated, but the gap is too large will cause air leakage, and the gap is too small will cause collision.

[0005] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0006] An air preheater hot end sealing device, comprising a rotor baffle, the rotor baffle is connected with a sealing plate through bolt nut fastener, the sealing plate comprises an upper support plate and a lower sealing plate;

[0007] The bottom of the upper support plate has a sliding support seat, the top end of the lower sealing plate is inserted into the sliding support seat, and an elastic member is arranged in the inner cavity of the sliding support seat, and the top end of the lower sealing plate is fixedly connected with the elastic member;Under the action of the elastic member, the lower sealing plate elastically abuts against the hot end sector plate.

[0008] As a preferred scheme of the air preheater hot end sealing device, the bottom of the sliding support seat is provided with a groove for inserting the top end of the lower sealing plate.

[0009] As a preferred scheme of the air preheater hot end sealing device, the corresponding positions of the upper support plate and the rotor partition plate are provided with through holes for the bolt and nut fasteners.

[0010] As a preferred scheme of the air preheater hot end sealing device, the elastic member is a rubber column, which is located in the groove at the bottom of the sliding support seat, and the top of the rubber column is bonded to the top wall of the groove by glue.

[0011] As a preferred scheme of the air preheater hot end sealing device, the elastic member is a spring, which is located in the groove at the bottom of the sliding support seat, one end of the spring is fixedly connected to the top wall of the groove, and the other end of the spring is fixedly connected to the lower sealing plate.

[0012] As a preferred scheme of the air preheater hot end sealing device, the two ends of the spring are respectively welded with a first mounting disc and a second mounting disc.

[0013] The corresponding positions of the first mounting disc and the top wall of the groove are provided with internal thread holes, and the first mounting disc is fixed to the top wall of the groove by bolts.

[0014] The corresponding positions of the second mounting disc and the lower sealing plate are provided with internal thread holes, and the second mounting disc and the lower sealing plate are fixed by bolts.

[0015] As a preferred scheme of the air preheater hot end sealing device, the bottom of the lower sealing plate is bonded with a rubber block, and the rubber block elastically abuts against the hot end sector plate.

[0016] Compared with the prior art,

[0017] By replacing the hard sealing piece in the prior art with the sealing plate composed of the upper support plate and the lower sealing plate, the bottom of the upper support plate has a sliding support seat, the lower sealing plate is connected by sliding between the sliding support seat and the lower sealing plate, and the sliding support seat is provided with an elastic member; under the action of the elastic member, the lower sealing plate elastically abuts against the hot end sector plate, so that even if the air preheater is heated and collides during operation, the lower sealing plate and the hot end sector plate are in elastic contact, so that no large noise is generated; and when the lower sealing plate is subjected to an upward force, the lower sealing plate exerts pressure on the elastic member, so that the lower sealing plate moves slightly upward, without causing violent collision between the lower sealing plate and the hot end sector plate, and ensuring the sealing effect. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model;

[0019] Figure 2 Provided for Embodiment 1 of this utility model Figure 1 Cross-sectional view of the sliding support seat;

[0020] Figure 3 Provided for Embodiment 2 of this utility model Figure 1 Cross-sectional view of the sliding support seat;

[0021] Figure 4 Provided for Embodiment 2 of this utility model Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a structural schematic diagram of Embodiment 3 of the present utility model;

[0023] Figure 6 A schematic diagram of the hot end seal of an existing air preheater provided by this utility model.

[0024] In the figure: rotor partition 1, bolt and nut fasteners 2, hot end sector plate 3, upper support plate 4, sliding support seat 41, lower sealing plate 5, rubber block 51, rubber column 6, spring 7, first mounting plate 71, second mounting plate 72, hard sealing sheet 100. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0026] Example 1:

[0027] This utility model provides a sealing device for the hot end of an air preheater. Please refer to [link / reference]. Figures 1-2 The rotor partition 1 is connected to a sealing plate by bolts and nuts 2. The sealing plate includes an upper support plate 4 and a lower sealing plate 5.

[0028] The bottom of the upper support plate 4 is integrally provided with or welded with a sliding support seat 41, the top end of the lower sealing plate 5 is inserted into the sliding support seat 41, and an elastic member is arranged in the inner cavity of the sliding support seat 41, and the top end of the lower sealing plate 5 is fixedly connected with the elastic member; under the action of the elastic member, the lower sealing plate 5 is elastically abutted against the hot-end sector plate 3, so that even if the air preheater is in operation and heat collision occurs, the elastic contact between the lower sealing plate 5 and the hot-end sector plate 3 is achieved, so that large noise is not generated; and when the lower sealing plate 5 is subjected to an upward force, the lower sealing plate 5 is extruded against the elastic member, so that the lower sealing plate 5 is slightly moved upward, and violent collision between the lower sealing plate 5 and the hot-end sector plate 3 is not caused.

[0029] The bottom of the sliding support seat 41 is provided with a groove for inserting the top end of the lower sealing plate 5, and the inner wall of the groove is slidably connected with the lower sealing plate 5.

[0030] Corresponding positions of the upper support plate 4 and the rotor partition plate 1 are both provided with through holes for the bolt-nut fastener 2 to pass through.

[0031] The elastic member is a rubber column 6, which is located in the groove at the bottom of the sliding support seat 41, and the top of the rubber column 6 is bonded with the top wall of the groove by glue; even if the air preheater is in operation and heat collision occurs, the elastic contact between the lower sealing plate 5 and the hot-end sector plate 3 is achieved, so that large noise is not generated; and when the lower sealing plate 5 is subjected to an upward force, the lower sealing plate 5 is extruded against the rubber column 6, so that the lower sealing plate 5 is slightly moved upward, and violent collision between the lower sealing plate 5 and the hot-end sector plate 3 is not caused, and the sealing effect is ensured.

[0032] Embodiment 2:

[0033] Referring to the accompanying drawings Figures 3-4 Different from embodiment 1, the elastic member is a spring 7, which is located in the groove at the bottom of the sliding support seat 41, one end of the spring 7 is fixedly connected with the top wall of the groove, and the other end of the spring 7 is fixedly connected with the lower sealing plate 5; specifically, the two ends of the spring 7 are respectively welded with a first mounting disc 71 and a second mounting disc 72, the corresponding positions of the first mounting disc 71 and the top wall of the groove are both provided with internally threaded holes, and the first mounting disc 71 is fixed on the top wall of the groove by a bolt.

[0034] The second mounting disc 72 and the corresponding position of the lower sealing plate 5 are both provided with an internally threaded hole, and the second mounting disc 72 and the lower sealing plate 5 are fixed through bolts; even if the air preheater is heated and collides when running, at this time, the lower sealing plate 5 is in elastic contact with the hot end sector plate 3, so that no large noise is generated; and when the lower sealing plate 5 is subjected to an upward force, the lower sealing plate 5 exerts pressure on the spring 7, so that the lower sealing plate 5 moves slightly upward, without causing violent collision between the lower sealing plate 5 and the hot end sector plate 3, and ensuring the sealing effect.

[0035] Embodiment 3:

[0036] Referring to the drawings Figure 5 Different from embodiment 1, the bottom of the lower sealing plate 5 is bonded with a rubber block 51, and the rubber block 51 is in elastic abutment against the hot end sector plate 3, at this time, the rubber block 51 is in contact with the hot end sector plate 3, which can further reduce the collision between the lower sealing plate 5 and the hot end sector plate 3, and ensure the sealing effect.

[0037] Although the present application has been described with reference to the embodiments above in the foregoing description, it is to be understood that various modifications can be made without departing from the scope of the present application. In particular, the features of the embodiments of the present application can be used in any combination without structural conflict. The description of the embodiments of the present application is not intended to be exhaustive or to limit the present application to the precise form disclosed. Modifications or equivalents will be apparent to practitioners skilled in the art and can be made without departing from the scope of the present application. Accordingly, the present application is not limited to the specific embodiments described herein, but only by the claims which follow, and their equivalents.

Claims

1. A hot-side seal device for an air preheater, comprising a rotor diaphragm (1) to which a seal plate is connected by means of a bolt-nut fastener (2), characterized in that: The sealing plate comprises an upper support plate (4) and a lower sealing plate (5); The bottom of the upper support plate (4) is provided with a sliding support seat (41), the top end of the lower sealing plate (5) is inserted into the sliding support seat (41), and an elastic member is arranged in the inner cavity of the sliding support seat (41), and the top end of the lower sealing plate (5) is fixedly connected with the elastic member; under the action of the elastic member, the lower sealing plate (5) is elastically abutted against the hot-end sector plate (3).

2. A hot-side seal for an air preheater as defined in claim 1, wherein The bottom of the sliding support seat (41) is provided with a groove for inserting the top end of the lower sealing plate (5), and the inner wall of the groove is slidably connected with the lower sealing plate (5).

3. A hot-side seal for an air preheater as defined in claim 2, wherein, The upper support plate (4) and the rotor partition plate (1) are both provided with through holes corresponding to the bolt-nut fastener (2).

4. A hot-side seal for an air preheater as defined in claim 2, wherein, The elastic member is a rubber column (6), which is arranged in the groove at the bottom of the sliding support seat (41), and the top of the rubber column (6) is bonded to the top wall of the groove by glue.

5. A hot-side seal for an air preheater as defined in claim 3, wherein The elastic member is a spring (7), which is arranged in the groove at the bottom of the sliding support seat (41), one end of the spring (7) is fixedly connected with the top wall of the groove, and the other end of the spring (7) is fixedly connected with the lower sealing plate (5).

6. A hot-side seal for an air preheater as defined in claim 5, wherein, The spring (7) is respectively welded with a first mounting disc (71) and a second mounting disc (72) at two ends thereof; The first mounting disc (71) and the top wall of the groove are both provided with an internally-threaded hole corresponding to each other, and the first mounting disc (71) is fixed to the top wall of the groove by a bolt; The second mounting disc (72) and the lower sealing plate (5) are both provided with an internally-threaded hole corresponding to each other, and the second mounting disc (72) and the lower sealing plate (5) are fixed by a bolt.

7. A hot-side seal for an air preheater as defined in claim 5, wherein The bottom of the lower sealing plate (5) is bonded with a rubber block (51), and the rubber block (51) is elastically abutted against the hot-end sector plate (3).

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