CN218237529U - Air preheater stable state self compensating sealing device - Google Patents

Abstract

The utility model relates to the field of air pre-heaters, in particular to a steady-state self-compensating sealing device of an air pre-heater, which comprises a clamping plate, a ribbed plate, a clamping groove and a floating plate; the two clamping plates are fixed with the upper side of the partition plate through bolts; the rib plate is positioned between the two clamping plates, and the rib plate is positioned at the lower sides of the two clamping plates; the two clamping plates are separated by the rib plate to form a clamping groove; the compensating plate is positioned in the clamping groove, and the length of the compensating plate is equal to that of the clamping groove; one end of the compensating plate, which is adjacent to the rotating shaft of the rotating body, is fixedly connected with the rotating shaft of the rotating body; the floating plate on the upper side of the partition plate and the sector plate are kept sealed by means of the deformation of the floating plate which does not completely follow the partition plate.

Description

Air preheater stable state self compensating sealing device

Technical Field

The utility model relates to an air preheater field, in particular to air preheater stable state self compensating sealing device.

Background

An air preheater (air preheater for short) is a heat exchange device which utilizes hot flue gas discharged from the tail of coal-fired boiler of thermal power plant to heat cold air and then inputs the heated cold air into boiler for combustion supporting. The rotary air preheater has the advantages of compact structure, small volume, less material consumption, wear resistance, long service life and the like, so the rotary air preheater is widely applied to boilers of thermal power plants.

Referring to fig. 1-6, the air preheater includes a housing 10, a sector plate 11, a rotor 20, a partition plate 21, and a compensation plate 30; the shell 10 is in a cylindrical tubular shape, three fan-shaped plates 11 are arranged at the upper end and the lower end of the shell 10, and a flue gas channel (for hot flue gas to pass through), a primary air channel and a secondary air channel are formed among the three fan-shaped plates 11 respectively; a plurality of partition plates 21 are fixed on the rotating shaft wall of the rotating body 20; heat exchange elements (not shown in the figure) are fixedly arranged between the adjacent partition plates 21; referring to fig. 4 and 5, the rubber compensation plate 30 is fixed at the edge of the partition plate 21, so that the flue gas channel, the primary air channel and the secondary air channel are independent from each other, and air leakage is avoided; wherein the rotating body 20 rotates within the housing 10; the smoke channel, the primary air channel and the secondary air channel are respectively and independently used for heating smoke, air and air; the hot flue gas makes the heat transfer component that is located flue gas passageway department warm up, and rotor 20 rotates once wind passageway, overgrate air passageway in proper order, and the air in the air passageway of heating once wind passageway, overgrate air passageway in proper order of rotor 20.

Referring to fig. 6, due to the thermal deformation of the partition 21, the descending distance of the side of the rotating shaft away from the rotating body 20 is large; in particular, the rubber compensation plate 30 on the upper side of the partition plate 21 deforms following the partition plate 21, and the side of the compensation plate 30 on the upper side, which is far away from the rotating shaft of the rotating body 20, is not in contact with the sector plate 11; further, the sealing gap between the air preheater rotor 20 and the sector plate 11 varies, which causes air leakage from the air side to the flue gas side, and affects the heat exchange rate of air.

SUMMERY OF THE UTILITY MODEL

To the shortcoming that flue gas side leakage easily appears under the condition of high temperature deformation of prior art median septum upside, the utility model provides an air preheater stable state self compensating sealing device follows the means that the baffle warp through the floating plate is incomplete, realizes keeping sealed effect between floating plate of baffle upside and the sector plate.

In order to achieve the above object, the utility model adopts the following technical scheme:

a steady-state self-compensation sealing device of an air preheater comprises a clamping plate, a rib plate, a clamping groove and a floating plate;

the two clamping plates are fixed with the upper side of the partition plate through bolts;

the rib plate is positioned between the two clamping plates, and the rib plate is positioned at the lower sides of the two clamping plates; the two clamping plates are separated by the rib plate to form a clamping groove;

the compensating plate is positioned in the clamping groove, and the length of the compensating plate is equal to that of the clamping groove; one end of the compensating plate close to the rotating shaft of the rotating body is fixedly connected with the rotating shaft of the rotating body.

Furthermore, the floating plate main body is made of a material which is not easy to deform at high temperature, and the uppermost side part of the floating plate is made of a rubber material.

Further, the device also comprises a fixing plate, an L-shaped plate and a spring;

the L-shaped plates are formed by fixedly combining two mutually vertical plates, and the number of the L-shaped plates is two;

the fixing plate is positioned on one side of the two clamping plates far away from the partition plate and is fixedly connected with the clamping plate adjacent to the fixing plate;

the two L-shaped plates are positioned at two sides of the floating plate, one side plate of each L-shaped plate is fixedly connected with the floating plate, and the other side plate of each L-shaped plate is horizontal;

the horizontal side plates of the L-shaped plates are fixedly connected with the upper ends of the plurality of springs, and the lower ends of the springs are fixedly connected with the partition plates and the fixing plate;

the spring plays a role in supporting the floating plate.

The utility model has the advantages that:

the clip groove 400 is formed as the rib 300 separates the two clip plates 200; the two clamping plates are fixed with the upper side of the clapboard 21 through bolts; the compensating plate 30 is positioned in the clamping groove 400, and one end of the compensating plate 30, which is adjacent to the rotating shaft of the rotating body 20, is fixedly connected with the rotating shaft of the rotating body 20; when the diaphragm 21 is subjected to bending deformation, the clamping plate 200 is bent to follow the diaphragm 21; since the compensation plate 30 is not connected to the clamping plate 200 and one end of the compensation plate 30 is connected to the rotating shaft, the compensation plate 30 does not bend along with the partition plate 21; the floating plate on the upper side of the partition plate and the sector plate are kept sealed by means of the deformation of the floating plate which does not completely follow the partition plate.

Drawings

FIG. 1 is a schematic view of a prior art housing;

FIG. 2 is a schematic view of a prior art rotor;

FIG. 3 is a schematic structural diagram of an air preheater;

FIG. 4 is a partial cross-sectional view of an axial plane of the air preheater;

FIG. 5 isbase:Sub>A cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a schematic view of a thermal deformation of a separator;

FIG. 7 is a schematic structural diagram of the present application;

reference numerals comparison table:

the device comprises a shell 10, a sector plate 11, a rotating body 20, a partition plate 21 and a compensating plate 30;

clamp plate 200, rib plate 300, clamp groove 400, floating plate 500, fixed plate 600, L-shaped plate 700, spring 800.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.

Referring to fig. 7, the air preheater steady-state self-compensating sealing device includes a clamping plate 200, a rib plate 300, a clamping groove 400, and a floating plate 500;

the two clamping plates 200 are arranged and fixed with the upper side of the clapboard 21 through bolts;

the rib 300 is located between the two splints 200, and the rib 300 is located on the lower side of the two splints 200; the rib plate 300 separates the two clamping plates 200 to form a clamping groove 400;

the compensating plate 30 is positioned in the clamping groove 400, and the length of the compensating plate is equal to that of the clamping groove 400; one end of the compensation plate 30 adjacent to the rotational shaft of the rotational body 20 is fixedly coupled to the rotational shaft of the rotational body 20.

Preferably, the floating plate 500 is made of a material that is not easily deformed at high temperature, and the uppermost portion of the floating plate 500 is made of a rubber material (the rubber material ensures that the floating plate 500 is closely attached to the sector plate 11).

Further, the device also comprises a fixing plate 600, an L-shaped plate 700 and a spring 800;

the L-shaped plate 700 is formed by fixedly combining two mutually perpendicular plates, and the number of the L-shaped plates 700 is two;

the fixing plate 600 is positioned on one side of the two clamping plates 200 far away from the partition plate 21, and the fixing plate 600 is fixedly connected with the adjacent clamping plate 200;

the two L-shaped plates 700 are positioned at two sides of the floating plate 500, one side plate of each L-shaped plate 700 is fixedly connected with the floating plate 500, and the other side plate of each L-shaped plate 700 is horizontal;

a plurality of springs 800 are arranged, the horizontal side plates of the L-shaped plate 700 are fixedly connected with the upper ends of the springs 800, and the lower ends of the springs 800 are fixedly connected with the partition plate 21 and the fixing plate 600;

the spring 800 serves to support the floating plate 500 and prevent the floating plate 500 from being bent.

The principle is as follows: the clip groove 400 is formed as the rib 300 separates the two clip plates 200; the two clamping plates are fixed with the upper side of the clapboard 21 through bolts; the compensating plate 30 is positioned in the clamping groove 400, and one end of the compensating plate 30, which is adjacent to the rotating shaft of the rotating body 20, is fixedly connected with the rotating shaft of the rotating body 20; when the diaphragm 21 is subjected to bending deformation, the clamping plate 200 is bent to follow the diaphragm 21; since the compensation plate 30 is not connected to the clamping plate 200 and one end of the compensation plate 30 is connected to the rotating shaft, the compensation plate 30 does not bend along with the partition plate 21; the floating plate on the upper side of the partition plate and the sector plate are kept sealed by means of the deformation of the floating plate which does not completely follow the partition plate.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (3)

1. A steady-state self-compensating sealing device of an air preheater is characterized by comprising a clamping plate, a ribbed plate, a clamping groove and a floating plate;

the two clamping plates are fixed with the upper side of the partition plate through bolts;

the rib plate is positioned between the two clamping plates, and the rib plate is positioned at the lower sides of the two clamping plates; the two clamping plates are separated by the rib plate to form a clamping groove;

the compensating plate is positioned in the clamping groove, and the length of the compensating plate is equal to that of the clamping groove; one end of the compensating plate close to the rotating shaft of the rotating body is fixedly connected with the rotating shaft of the rotating body.

2. The air preheater steady-state self-compensating sealing device according to claim 1,

the floating plate main body is made of a high-temperature non-deformable material, and the uppermost side part of the floating plate is made of a rubber material.

3. The air preheater steady-state self-compensating sealing device according to claim 1,

the device also comprises a fixed plate, an L-shaped plate and a spring;

the L-shaped plates are formed by fixedly combining two mutually vertical plates, and the number of the L-shaped plates is two;

the fixing plate is positioned on one side of the two clamping plates far away from the partition plate and is fixedly connected with the clamping plate adjacent to the fixing plate;

the two L-shaped plates are positioned at two sides of the floating plate, one side plate of each L-shaped plate is fixedly connected with the floating plate, and the other side plate of each L-shaped plate is horizontal;

the horizontal side plates of the L-shaped plates are fixedly connected with the upper ends of the plurality of springs, and the lower ends of the springs are fixedly connected with the partition plates and the fixing plate;

the spring plays a role in supporting the floating plate.

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