Labyrinth self-locking seal device for air preheater bypass

Abstract

The utility model discloses belong to the air preheater technical field, concretely is a kind of air preheater bypass labyrinth self-locking type sealing device, including two groups of shell, the side of two groups of shell is equipped with L type rotor angle steel, the side of each group of shell is detachably connected first bypass sealing piece and second bypass sealing piece by fixed assembly, and the space between first bypass sealing piece and second bypass sealing piece and L type rotor angle steel is equipped as pressure relief chamber. The fixed assembly includes L type board, and the L type board is detachably connected on shell by first connecting component, and connecting plate is fixedly installed on L type board, and first bypass sealing piece and second bypass sealing piece are detachably connected on connecting plate by second connecting component. The utility model discloses by utilizing the pressure relief chamber formed between first sealing piece and second sealing piece and L type rotor angle steel, with can further reduce the problem of air leakage.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater technical field, concretely is a kind of air preheater bypass labyrinth self-locking sealing device. BACKGROUND

[0002] The air leakage of rotary air preheater is composed of radial, axial and bypass (the bypass is also called annular) three parts. The axial and bypass air leakage can be regarded as a whole, because the air leakage first enters the area between air preheater shell and rotor from bypass, and then leaks from air side to flue gas side through the sealing gap channel between axial arc plate and axial sealing sheet. Therefore, the bypass of air preheater is the first line of defense of the above-mentioned air leakage, the sealing gap channel between the axial arc plate and the axial sealing sheet is the second line of defense, the first line of defense is firm, the second line of defense is light, the whole is more reliable, the air leakage is small, as shown in Figure 7 .

[0003] The conventional bypass sealing, that is, the first line of defense, is to form a ring along the circumferential sealing of the outer edge of the rotor by using the bypass sealing sheet installed on the rotor shell and the sealing section steel installed on the rotor. The sealing section steel has T type and L type, and the conventional bypass sealing sheet has only one, that is, the vertical surface of the sealing section steel, as shown in Figure 8 .

[0004] The conventional structure of the bypass sealing sheet is a comb-tooth type sealing sheet, two pieces are separately made, and are stacked together during on-site installation. After installation, the two pieces are still in a separated structure, so that the comb-tooth edge is easy to be rolled, dislocated and fallen during operation, as shown in Figure 9 . Therefore, the air preheater bypass labyrinth self-locking sealing device is invented. CONTENT OF THE UTILITY MODEL

[0005] In view of the above-mentioned and / or existing problems in the prior art, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide an air preheater bypass labyrinth self-locking sealing device, which can solve the above-mentioned existing problems.

[0007] To solve the above-mentioned technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0008] An air preheater bypass labyrinth self-locking sealing device comprises two groups of shells, one side of each group of shells is provided with an L-shaped rotor angle steel, one side of each group of shells is detachably connected with a first bypass sealing sheet and a second bypass sealing sheet through a fixing assembly, and the space between the first bypass sealing sheet, the second bypass sealing sheet and the L-shaped rotor angle steel is a pressure reduction cavity.

[0009] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, the fixed assembly comprises:

[0010] The L-shaped plate is detachably connected to the shell through the first connecting assembly.

[0011] The connecting plate is fixedly installed on the L-shaped plate, and the first bypass sealing piece and the second bypass sealing piece are detachably connected to the connecting plate through the second connecting assembly.

[0012] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, the first connecting assembly comprises:

[0013] The stud is fixedly installed on the shell.

[0014] The stud passes through the pressing plate at one end.

[0015] The first nut is threadedly connected to the stud.

[0016] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, the pressing plate is in contact with the L-shaped plate, and the first nut is in contact with the pressing plate.

[0017] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, the second connecting assembly comprises:

[0018] The screw passes through the connecting plate, the first bypass sealing piece and the second bypass sealing piece at one end.

[0019] The second nut is threadedly connected to the screw.

[0020] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, a first gasket is arranged between the head of the second nut and the connecting plate, and one end of the second nut passes through the first gasket.

[0021] As a preferred scheme of the air preheater bypass labyrinth self-locking type sealing device, a second gasket is arranged between the second nut and the second bypass sealing piece, and one end of the second nut passes through the second gasket.

[0022] As a preferred scheme of the air preheater bypass labyrinth self-locking sealing device, the first bypass sealing sheet and the second bypass sealing sheet are composed of the first sealing sheet and the second sealing sheet with the same structure, the first sealing sheet and the second sealing sheet are provided with the fold holes, and the first sealing sheet and the second sealing sheet are interlocked and stacked together.

[0023] Compared with the prior art, the air preheater bypass labyrinth self-locking sealing device has the following advantages:

[0024] 1. The sealing sheet double sheets are stacked into a self-locking structure, which can solve the problem of no edge folding misplacement and has long-term effective sealing effect.

[0025] 2. The first sealing sheet and the second sealing sheet form a pressure reduction cavity with the L-shaped rotor angle steel, which can further reduce the air leakage problem.

[0026] 3. The air preheater bypass labyrinth self-locking sealing device has the advantages of stable structure, long service life, simple design, small size, convenience, low cost and strong expansibility. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a front view schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a front view schematic diagram of the local structure of the utility model;

[0029] Figure 3 It is a front view schematic diagram of the first sealing sheet of the utility model;

[0030] Figure 4 It is a side view schematic diagram of the first sealing sheet of the utility model;

[0031] Figure 5 It is a front view schematic diagram of the second sealing sheet of the utility model;

[0032] Figure 6 It is a side view schematic diagram of the second sealing sheet of the utility model;

[0033] Figure 7 It is a schematic diagram of the prior art;

[0034] Figure 8 It is a schematic diagram of the prior art;

[0035] Figure 9 It is a schematic diagram of the prior art.

[0036] In the figure: the shell 10, the L-shaped rotor angle steel 20, the first bypass sealing sheet 30, the second bypass sealing sheet 31, the L-shaped plate 40, the connecting plate 41, the stud 50, the pressing plate 51, the first nut 52, the screw 60, the second nut 61, the first gasket 62, the second gasket 63, the first sealing sheet 70, and the second sealing sheet 71. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will combine the embodiment of the utility model with the drawings to make further detailed description.

[0038] The utility model provides a kind of air preheater bypass labyrinth self-locking sealing device, please refer to Figures 1-6 Including two groups of shell 10, the side of two groups of shell 10 is equipped with L-shaped rotor angle steel 20, the side of each shell 10 is detachably connected first bypass sealing sheet 30 and second bypass sealing sheet 31 by fixed assembly, and the space between first bypass sealing sheet 30 and second bypass sealing sheet 31 and L-shaped rotor angle steel 20 is provided as pressure relief chamber.

[0039] Fixed assembly includes: L-shaped plate 40, connecting plate 41;

[0040] L-shaped plate 40 is detachably connected on shell 10 by first connecting assembly, connecting plate 41 is fixedly installed on L-shaped plate 40, and first bypass sealing sheet 30 and second bypass sealing sheet 31 are detachably connected on connecting plate 41 by second connecting assembly.

[0041] First connecting assembly includes: stud 50, pressing plate 51, first nut 52;

[0042] Stud 50 is fixedly installed on shell 10, one end of stud 50 passes through pressing plate 51, first nut 52 is threadedly connected on stud 50, pressing plate 51 is in contact with L-shaped plate 40, and first nut 52 is in contact with pressing plate 51.

[0043] Second connecting assembly includes: screw 60, second nut 61, first gasket 62, second gasket 63;

[0044] One end of screw 60 passes through connecting plate 41, first bypass sealing sheet 30 and second bypass sealing sheet 31 in sequence, second nut 61 is threadedly connected on screw 60, first gasket 62 is arranged between the head of second nut 61 and connecting plate 41, one end of second nut 61 passes through first gasket 62, second gasket 63 is arranged between second nut 61 and second bypass sealing sheet 31, and one end of second nut 61 passes through second gasket 63.

[0045] The first bypass sealing piece 30 and the second bypass sealing piece 31 are both composed of the first sealing piece 70 and the second sealing piece 71 which are identical in structure, and the first sealing piece 70 and the second sealing piece 71 are interlocked and laminated together, wherein the bypass sealing piece is made of 1.5mm-thick steel plate, is made of Corten steel, is nested and installed in a factory, is laminated together by a die, becomes a group, and can be adjusted in angle during on-site installation, has a short installation period, and has good sealing effect.

[0046] In specific use, the specific steps are as follows:

[0047] First, the pressing plate 51 passes through the stud 50, then the L-shaped plate 40 is placed between the shell 10 and the pressing plate 51, and then the first nut 52 is threadedly connected to the stud 50, so that the L-shaped plate 40 can be fixed; after the L-shaped plate 40 is fixed, one end of the screw 60 passes through the first gasket 62, the connecting plate 41, the first bypass sealing piece 30, the second bypass sealing piece 31 and the second gasket 63 in sequence, then the second nut 61 is threadedly connected to the screw 60, so that the first bypass sealing piece 30 and the second bypass sealing piece 31 can be fixed, and after the first bypass sealing piece 30 and the second bypass sealing piece 31 are fixed, a pressure relief cavity is formed between the first bypass sealing piece 30, the second bypass sealing piece 31 and the L-shaped rotor angle steel 20.

[0048] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined in any way, and the combinations are not exhaustively described in the specification only for the purpose of saving space and resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An air preheater bypass labyrinth self-locking sealing device, comprising two groups of housings (10), one side of each of the two groups of housings (10) is provided with an L-shaped rotor angle steel (20), characterized in that, One side of each of the shell (10) is detachably connected with the first bypass sealing piece (30) and the second bypass sealing piece (31) through a fixing assembly, and the space between the first bypass sealing piece (30) and the second bypass sealing piece (31) and the L-shaped rotor angle steel (20) is provided as a pressure relief cavity. The first bypass sealing piece (30) and the second bypass sealing piece (31) are both composed of a first sealing piece (70) and a second sealing piece (71) which are the same in structure, and the first sealing piece (70) and the second sealing piece (71) are both provided with a fold hole, and the first sealing piece (70) and the second sealing piece (71) are interlocked and stacked together.

2. A bypass labyrinth self-sealing device for an air preheater according to claim 1, characterized in that, The fixing assembly comprises: An L-shaped plate (40) is detachably connected on the shell (10) through a first connecting assembly; A connecting plate (41) is fixedly installed on the L-shaped plate (40), and the first bypass sealing piece (30) and the second bypass sealing piece (31) are detachably connected on the connecting plate (41) through a second connecting assembly.

3. A bypass labyrinth self-sealing device for an air preheater according to claim 2, characterized in that, The first connecting assembly comprises: A stud (50) is fixedly installed on the shell (10); A pressing plate (51) is penetrated by one end of the stud (50); A first nut (52) is threadedly connected on the stud (50).

4. A bypass labyrinth self-sealing device for an air preheater according to claim 3, characterized in that, The pressing plate (51) is in contact with the L-shaped plate (40), and the first nut (52) is in contact with the pressing plate (51).

5. A bypass labyrinth self-sealing device for an air preheater according to claim 2, characterized in that, The second connecting assembly comprises: A screw (60) is sequentially penetrated by the connecting plate (41), the first bypass sealing piece (30) and the second bypass sealing piece (31); A second nut (61) is threadedly connected on the screw (60).

6. A bypass labyrinth self-sealing device for an air preheater according to claim 5, characterized in that, A first gasket (62) is arranged between the head of the second nut (61) and the connecting plate (41), and one end of the second nut (61) is penetrated by the first gasket (62).

7. A bypass labyrinth self-sealing device for an air preheater according to claim 6, characterized in that, A second gasket (63) is arranged between the second nut (61) and the second bypass sealing piece (31), and one end of the second nut (61) is penetrated by the second gasket (63).

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