CN201434627Y - Flexible sealing device for rotary air preheater - Google Patents

Abstract

The flexible sealing device of the rotary air preheater of the utility model is characterized in that the flexible sealing device comprises a connecting plate, a splint and a metal wire layer, and the rear end of the metal wire layer is clamped and welded on the front end of the connecting plate and the Between the splints, the front end of the metal wire layer is the front end of the flexible sealing device, and an installation hole is arranged on the connecting plate. The flexible sealing device is installed on the beam of the rotating cylinder of the rotary air preheater through the installation hole on the connecting plate, or is installed together with the sealing sheet on the beam of the rotating cylinder of the rotary air preheater. The bristles are not easy to fall off, the structure is simple, the design is reasonable, the manufacturing is precise, the overall cost is low, the installation is convenient, the sealing effect is good, and the service life is long.

Description

Flexible sealing device for rotary air preheater

technical field

The utility model relates to a rotary air preheater, in particular to a sealing device of the preheater, which belongs to a part of equipment for heat exchange by means of a rotary motion channel.

Background technique

In the current domestic large-scale rotary air preheater structure, the internal seal is a disc seal. The structure is that radial, axial and circumferential seal pairs are set around the rotating rotor. The seal is an adjustable seal. The sheet is fastened to a rotatable beam. The air preheater is divided into the air side and the flue gas side. There is a large pressure difference between the two. Because the sealing plate has a certain design gap, the problem of air leakage to the flue gas is the so-called air leakage problem. The design value of the normal air leakage rate is about 9%. Since the sealing plate is a steel sealing device, although the gap can be adjusted, it can only be adjusted during installation or shutdown, and cannot be adjusted during work. In order to prevent collisions, it should be adjusted during installation. The gap of the air preheater is large, and the drum of the air preheater will bulge irregularly with the temperature change when it is working, resulting in a further increase in the gap, so that the actual air leakage rate exceeds the design value by a lot, as high as 20% to 30%. Significantly increase energy consumption and operating costs.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the above-mentioned existing sheet seals that the leakage is too large due to their large gaps, and to provide a seal that can replace the seal sheet or be installed on the beam of the drum together with the seal sheet. The structure is simple and reasonable, the sealing performance is good, the leakage is small, and the flexible sealing device of the rotary air preheater is beneficial to energy saving and operation cost reduction.

The flexible sealing device of the rotary air preheater of the utility model includes a connecting plate, a splint and a wire layer, wherein the rear end of the wire layer is clamped and welded between the front end of the connecting plate and the splint, The front end of the metal wire layer is the front end of the flexible sealing device, and an installation hole is arranged on the connecting plate. The flexible sealing device is installed on the beam of the rotating cylinder of the rotary air preheater through the installation hole on the connecting plate, or is installed together with the sealing sheet on the beam of the rotating cylinder of the rotary air preheater. In order to facilitate installation and facilitate rotation, the front end of the connecting plate can be properly bent towards the wire layer. The wire layer of the flexible sealing device is composed of high temperature resistant metal filaments.

The flexible sealing device of the utility model is composed of high temperature-resistant metal filaments because the rigid sheet seals in the radial, axial and circumferential sealing pairs are added or changed to a flexible sealing device with a wire layer. The metal wire layer has moderate flexibility and rigidity, and even if it touches the upper drum, it will not affect the normal operation of the air preheater. Because the wire layer has an appropriate thickness and the pressure difference on both sides is small, it is airtight and leak-proof The effect is good, plus the sealing advantage of zero gap between the bristles and the fan-shaped plate. It can effectively prevent the leakage of the medium (the medium that must be sealed), and prevent the medium from the external environment from entering the sealed chamber (internal leakage). The leakage is only 1/5 to 1/20 of the design leakage of ordinary seals. And because the sealing body is an integral welded structure, the bristles are not easy to fall off, and has the advantages of simple structure, reasonable design, precise manufacturing, low overall cost, convenient installation, good sealing effect and long service life.

Description of drawings

Accompanying drawing 1 is a kind of structural representation of the flexible sealing device of the present utility model;

Accompanying drawing 2 and 3 are the installation structure schematic diagrams of the flexible sealing device of accompanying drawing 1;

Accompanying drawing 4 is another kind of structural representation of the flexible sealing device of the present utility model;

Figures 5 and 6 are schematic diagrams of the installation structure of the flexible sealing device of Figure 4 .

In the above-mentioned accompanying drawings, 1 is a connecting plate, 2 is an installation hole, 3 is a welding layer, 4 is a splint, 5 is a wire layer, 6 is a beam of a drum, and 7 is a sealing sheet.

Detailed ways

Referring to accompanying drawings 1 and 4, the flexible sealing device in the figure comprises connecting plate 1, splint 4 and wire layer 5, wherein, the rear end of wire layer 5 is clamped and welded between connecting plate 1 front end and splint 4, Welding can be welded or spot welded, and the front end of the wire layer 5 is a plane (as shown in Figure 1) or a surface (as shown in Figure 4), and the connecting plate is provided with mounting holes 2. The flexible sealing device is installed on the beam 6 of the drum of the rotary air preheater through the installation hole 2 on the connecting plate (as shown in Figure 2 or Figure 5), or is installed together with the sealing sheet 7 on the rotary air preheater On the beam 6 of the drum (as shown in Figure 3 or Figure 6). In order to facilitate installation and facilitate rotation, the front end of the connecting plate can be properly bent to the wire layer (as shown in Figures 4, 5, and 6). The wire layer 5 of the above-mentioned flexible sealing device is composed of high temperature resistant metal filaments.

Claims (2)

1, a kind of flexible seal device of rotary regenerative air preheater, its structure comprises gusset piece, clamping plate and metal wire layer, the rear end of described metal wire layer clamps and is welded between gusset piece front end and the clamping plate, and the front end of metal wire layer is the front end of flexible seal device, and gusset piece is provided with installing hole.

2, the flexible seal device of rotary regenerative air preheater according to claim 1 is characterized in that described metal wire layer is made up of resistant to elevated temperatures filament.

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