Air preheater with good sealing performance

Abstract

The utility model discloses an air preheater with good sealing performance, and relates to the technical field of air preheaters, the air preheater with good sealing performance is provided with an air inlet, an air outlet, a sealing head, a connecting sleeve, a guide cover, a first sealing washer, an extension sleeve and an elastic sealing belt, the sealing head is fixed on the air inlet and the air outlet, and the connecting sleeve is fixed on the guide cover. The guide cover can be arranged in the air inlet and the air outlet, the first sealing gasket can block the interior of the air inlet and the interior of the air outlet, the guide cover transmits air into the preheater body to achieve heat exchange operation, meanwhile, the guide cover is attached to the interior of the air inlet and the interior of the air outlet, and double sealing is achieved from the interior together with the first sealing gasket. Air is prevented from leaking out from the joint of the sealing head and the air inlet and the joint of the sealing head and the air outlet, the extension sleeve and the elastic sealing belt are arranged on an external pipeline in a sleeving mode, the elastic sealing belt can be firmly fixed to the external pipeline through the hoop, sealing between the external pipeline and the extension sleeve is achieved, and the sealing performance is better.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to an air preheater with good sealing performance. Background Art

[0002] At present, air preheaters are usually used to preheat the air entering the boiler to achieve the heat exchange performance of the boiler. In order to ensure that the air inside the air preheater can circulate normally, it is usually necessary to strengthen the sealing inside the air preheater, especially the connection between the air inlet and outlet of the air preheater.

[0003] For example, the utility model with patent number CN202121246814.5 discloses a highly sealed composite air preheater, which solves the problem that the composite air preheater on the market currently has poor sealing, is easy to cause smoke leakage, pollutes the environment, and has large overall usage limitations. It includes a preheater body and a protection box, the preheater body is movably connected to the inside of the protection box, the inner surface of the protection box is fixedly connected to a heat insulation pad, the surface of the protection box is fixedly connected to a sealing frame, an opening is provided between the protection box and the sealing frame, the surface of the opening is fixedly connected to an extrusion gasket, and both sides of the preheater body are movably connected to pads by mounting screws. The highly sealed composite air preheater ensures the sealing of the preheater body in the box through the design of an integrated box body, and has a simple structure, strong practicality, and greatly improves the sealing of the preheater, thereby effectively improving the working efficiency of the preheater, and is easy to use and promote;

[0004] The air preheater in this patent cannot strengthen the sealing at the air inlet and outlet, resulting in some air overflowing from the connection of the pipe during the air circulation process, and the sealing effect is not very good. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an air preheater with good sealing performance, which solves the problem of poor sealing effect.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: an air preheater with good sealing performance, comprising a preheater shell, a preheater body is arranged on the inner side of the preheater shell, a sealing cover plate is detachably installed on the side of the preheater shell, a support column is fixedly installed on the lower end of the preheater shell, an air inlet is arranged at one end of the preheater shell, an air outlet is arranged at the other end of the preheater shell, a sealing head is detachably installed on the outside of the air inlet and the air outlet, a connecting sleeve is fixedly installed on the inner side of the sealing head, a thread is arranged on the surface of the connecting sleeve, a guide cover is fixedly installed on the end of the connecting sleeve, a first sealing gasket is arranged on the surface of the connecting sleeve, evenly distributed suction cups are arranged on the inner side of the sealing head, an extension sleeve is fixedly installed on the outer side of the sealing head, an elastic sealing belt is fixedly connected to the outer side of the extension sleeve, a clamp is arranged on the outer side of the elastic sealing belt, and evenly distributed spikes are arranged on the inner side of the clamp.

[0007] Preferably, the air inlet and the air outlet are symmetrically distributed on the left and right, and the connecting sleeve is threadedly connected to the air inlet and the air outlet.

[0008] Preferably, evenly distributed first connecting ear plates are arranged on the outside of the air inlet and the air outlet, and second connecting ear plates corresponding to the first connecting ear plates are arranged on the outside of the sealing head.

[0009] Furthermore, mounting holes are provided on surfaces of the first connecting ear plate and the second connecting ear plate, and first bolts are detachably mounted on the first connecting ear plate and the second connecting ear plate.

[0010] Preferably, a clamping block is arranged on the inner side of the sealing cover plate, a fixing plate is arranged on the inner side of the clamping block, and a second sealing gasket is arranged on the outer side of the fixing plate.

[0011] Furthermore, a card slot corresponding to the card block is provided on the side of the preheater shell, and a connecting groove corresponding to the second sealing gasket is provided inside the card slot.

[0012] Beneficial Effects

[0013] The utility model provides an air preheater with good sealing performance. Compared with the prior art, it has the following beneficial effects:

[0014] The air preheater with good sealing performance is provided with an air inlet, an air outlet, a sealing head, a connecting sleeve, a guide cover, a first sealing gasket, an extension sleeve and an elastic sealing belt. The sealing head is fixed on the air inlet and the air outlet so that the guide cover can be placed inside the air inlet and the air outlet. The first sealing gasket can block the inside of the air inlet and the air outlet. The guide cover transfers air to the preheater body to realize heat exchange operation. At the same time, the guide cover fits inside the air inlet and the air outlet, and realizes double sealing from the inside together with the first sealing gasket to prevent air from leaking from the connection between the sealing head and the air inlet and the air outlet. The extension sleeve and the elastic sealing belt are put on the external pipe. The elastic sealing belt can be firmly fixed on the external pipe by using a clamp to realize the sealing between the external pipe and the extension sleeve, and the sealing is reinforced from both inside and outside to achieve better sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the installation structure of the sealing cover plate in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the sealing cover plate in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the sealing head in the utility model.

[0019] In the figure: 1. preheater shell; 2. preheater body; 3. sealing cover plate; 4. support column; 5. air inlet; 6. air outlet; 7. sealing head; 8. clamping block; 9. connecting sleeve; 10. guide cover; 11. first sealing gasket; 12. suction cup; 13. extension sleeve; 14. elastic sealing belt; 15. clamping hoop; 16. first connecting ear plate; 17. second connecting ear plate; 18. clamping groove; 19. connecting groove; 20. fixing plate; 21. second sealing gasket. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4The utility model provides a technical solution: an air preheater with good sealing performance, comprising a preheater shell 1, a preheater body 2 is arranged inside the preheater shell 1, a sealing cover plate 3 is detachably installed on the side of the preheater shell 1, a support column 4 is fixedly installed at the lower end of the preheater shell 1, an air inlet 5 is arranged at one end of the preheater shell 1, and an air outlet 6 is arranged at the other end of the preheater shell 1, a sealing head 7 is detachably installed outside the air inlet 5 and the air outlet 6, a connecting sleeve 9 is fixedly installed inside the sealing head 7, a thread is arranged on the surface of the connecting sleeve 9, and a guide is fixedly installed at the end of the connecting sleeve 9 The cover 10 and the connecting sleeve 9 are provided with a first sealing gasket 11 on their surfaces, and the inner side of the sealing head 7 is provided with evenly distributed suction cups 12, by providing the suction cups 12, the sealing head 7 can be adsorbed on the air inlet 5 and the air outlet 6, an extension sleeve 13 is fixedly installed on the outer side of the sealing head 7, an elastic sealing belt 14 is fixedly connected to the outer side of the extension sleeve 13, a clamp 15 is provided on the outer side of the elastic sealing belt 14, and evenly distributed spikes are provided on the inner side of the clamp 15, and by providing the spikes, the clamp 15 can be firmly buckled on the elastic sealing belt 14, thereby firmly fixing the elastic sealing belt 14 on the external pipe.

[0022] The air inlet 5 and the air outlet 6 are symmetrically distributed, the connecting sleeve 9 is threadedly connected to the air inlet 5 and the air outlet 6, and the outer side of the air inlet 5 and the air outlet 6 is provided with uniformly distributed first connecting ear plates 16, and the outer side of the sealing head 7 is provided with a second connecting ear plate 17 corresponding to the first connecting ear plate 16. The surfaces of the first connecting ear plate 16 and the second connecting ear plate 17 are provided with mounting holes, and the first connecting ear plate 16 and the second connecting ear plate 17 are detachably installed with a first bolt. Plate 17 can firmly fix the sealing head 7 with the air inlet 5 and the air outlet 6 together, a clamping block 8 is arranged on the inner side of the sealing cover plate 3, a fixing plate 20 is arranged on the inner side of the clamping block 8, a second sealing gasket 21 is arranged on the outer side of the fixing plate 20, a clamping groove 18 corresponding to the clamping block 8 is opened on the side of the preheater shell 1, a connecting groove 19 corresponding to the second sealing gasket 21 is arranged on the inner side of the clamping groove 18, and the sealing cover plate 3 can be firmly clamped on the preheater shell 1 through the mutual cooperation between the connecting groove 19 and the second sealing gasket 21.

[0023] During operation, the sealing head 7 is first fixed on the air inlet 5 and the air outlet 6, so that the guide cover 10 can be placed inside the air inlet 5 and the air outlet 6, and the first sealing gasket 11 can block the inside of the air inlet 5 and the air outlet 6. The guide cover 10 transfers air to the preheater body 2 to realize heat exchange operation. At the same time, the guide cover 10 fits inside the air inlet 5 and the air outlet 6, and realizes double sealing from the inside together with the first sealing gasket 11. After fixing, the first connecting ear plate 16 and the second connecting ear plate 17 are connected to each other with the first bolt, so that the sealing head 7 is completely fitted with the air inlet 5 and the air outlet 6, which can prevent air from leaking from the connection between the sealing head 7 and the air inlet 5 and the air outlet 6, and then the external pipe is fixedly inserted into the sealing head 7, so that the extension sleeve 13 and the elastic sealing belt 14 can be put on the external pipe, and then the elastic sealing belt 14 is firmly fixed on the external pipe with the clamp 15 to realize the sealing between the external pipe and the extension sleeve 13.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. An air preheater with good sealing performance, comprising a preheater housing (1), characterized in that: A preheater body (2) is arranged inside the preheater shell (1), a sealing cover plate (3) is detachably mounted on the side of the preheater shell (1), a support column (4) is fixedly mounted on the lower end of the preheater shell (1), an air inlet (5) is arranged at one end of the preheater shell (1), and an air outlet (6) is arranged at the other end of the preheater shell (1), sealing heads (7) are detachably mounted on the outside of the air inlet (5) and the air outlet (6), a connecting sleeve (9) is fixedly mounted on the inside of the sealing head (7), and the connecting sleeve (9) is fixedly mounted on the inner side of the sealing head (7). The surface of the sleeve (9) is provided with threads, a guide cover (10) is fixedly installed at the end of the connecting sleeve (9), a first sealing gasket (11) is provided on the surface of the connecting sleeve (9), the inner side of the sealing head (7) is provided with evenly distributed suction cups (12), the outer side of the sealing head (7) is fixedly installed with an extension sleeve (13), the outer side of the extension sleeve (13) is fixedly connected with an elastic sealing belt (14), the outer side of the elastic sealing belt (14) is provided with a clamp (15), and the inner side of the clamp (15) is provided with evenly distributed spikes.

2. The air preheater with good sealing performance according to claim 1, characterized in that: The air inlet (5) and the air outlet (6) are symmetrically distributed on the left and right sides, and the connecting sleeve (9) is threadedly connected to the air inlet (5) and the air outlet (6).

3. The air preheater with good sealing performance according to claim 1, characterized in that: The air inlet (5) and the air outlet (6) are provided with uniformly distributed first connecting ear plates (16) on the outside, and the sealing head (7) is provided with a second connecting ear plate (17) corresponding to the first connecting ear plate (16) on the outside.

4. The air preheater with good sealing performance according to claim 3, characterized in that: The surfaces of the first connecting ear plate (16) and the second connecting ear plate (17) are provided with mounting holes, and the first connecting ear plate (16) and the second connecting ear plate (17) are detachably mounted with first bolts.

5. The air preheater with good sealing performance according to claim 1, characterized in that: A clamping block (8) is arranged on the inner side of the sealing cover plate (3), a fixing plate (20) is arranged on the inner side of the clamping block (8), and a second sealing gasket (21) is arranged on the outer side of the fixing plate (20).

6. The air preheater with good sealing performance according to claim 5, characterized in that: A card slot (18) corresponding to the card block (8) is provided on the side of the preheater housing (1), and a connecting slot (19) corresponding to the second sealing gasket (21) is provided inside the card slot (18).

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