阅读说明：本技术 一种机械自校正空预器密封装置 (Mechanical self-correcting air preheater sealing device ) 是由 赵鹏 孙宇 孙洋 陈福垚 马淳锋 薛仕龙 陈咏梅 丁文超 于 2019-09-24 设计创作，主要内容包括：一种机械自校正空预器密封装置,属于空预器技术领域,固定密封板上端与扇形板下端面存有间隙L,径向隔板位于固定密封板左侧,径向隔板左侧壁上安装有径向密封片,固定密封板左侧壁安装有密封件,径向密封片右端面于密封件相贴合,固定密封板、径向密封片和径向隔板通过限位装置进行周向限位；空预器外壳内壁周向开有自动校正槽,固定密封板另一端置于自动校正槽内。本发明固定密封板因自动校正槽的原因不会发生径向形变,只有径向隔板和径向密封片端部下降即发生了蘑菇形状的形变,在形变的过程中通过限位装置防止了周向的形变,从而密封件始终与径向密封片接触,所以不会发生漏风区的问题,即提高了安全性。(A mechanical self-correcting air preheater sealing device belongs to the technical field of air preheaters, wherein a gap L exists between the upper end of a fixed sealing plate and the lower end face of a sector plate, a radial partition plate is positioned on the left side of the fixed sealing plate, a radial sealing sheet is arranged on the left side wall of the radial partition plate, a sealing element is arranged on the left side wall of the fixed sealing plate, the right end face of the radial sealing sheet is attached to the sealing element, and the fixed sealing plate, the radial sealing sheet and the radial partition plate are circumferentially limited through a; the inner wall of the air preheater shell is circumferentially provided with an automatic correction groove, and the other end of the fixed sealing plate is arranged in the automatic correction groove. The fixed sealing plate cannot generate radial deformation due to the automatic correction groove, mushroom-shaped deformation occurs only when the end parts of the radial partition plate and the radial sealing piece descend, and circumferential deformation is prevented by the limiting device in the deformation process, so that the sealing piece is always in contact with the radial sealing piece, the problem of a wind leakage area cannot occur, and safety is improved.)

1. A mechanical self-correcting air preheater sealing device comprises a central cylinder (1) and a sector plate (2), wherein the sector plate (2) is installed on an air preheater truss (6), the air preheater truss (6) is installed on an air preheater shell (4), the central cylinder (1) and the sector plate (2) are coaxially arranged and rotate relative to the sector plate (2), a plurality of sealing devices (3) are circumferentially arrayed on the side wall of the central cylinder (1), the mechanical self-correcting air preheater sealing device is characterized in that each sealing device (3) comprises a fixed sealing plate (31), a radial sealing plate (32), a radial partition plate (33), a limiting device (34) and a sealing element (35), the side wall of the central cylinder (1) is vertically provided with the fixed sealing plate (31) and the radial partition plate (33), a gap L exists between the upper end of the fixed sealing plate (31) and the lower end face of the sector plate (2), and the radial partition plate (33) is located on the left side of the fixed sealing, a radial sealing piece (32) is arranged on the left side wall of the radial clapboard (33);

a sealing element (35) is installed on the left side wall of the fixed sealing plate (31), the right end face of the radial sealing piece (32) is attached to the sealing element (35), and the fixed sealing plate (31), the radial sealing piece (32) and the radial partition plate (33) are circumferentially limited through a limiting device (34); the inner wall of the air preheater shell (4) is circumferentially provided with an automatic correction groove (5), and the other end of the fixed sealing plate (31) is arranged in the automatic correction groove (5).

2. A mechanical self-aligning air preheater sealing arrangement according to claim 1, wherein the limiting means (34) comprises: the sealing device comprises a limiting threaded rod (341) and an internal thread limiting block (342), wherein a U-shaped through groove (311) is formed in the fixed sealing plate (31), one end of the limiting threaded rod (341) sequentially penetrates through a radial sealing piece (32), a radial partition plate (33) and the U-shaped through groove (311), and the internal thread limiting block (342) is arranged at two ends of the limiting threaded rod (341) and is used for adjusting position limiting points through the internal thread limiting block (342).

3. A mechanical self-aligning air preheater sealing arrangement according to claim 2, wherein the radial sealing plate (32) is fixedly mounted on the radial partition (33) by welding.

4. A mechanical self-aligning air preheater sealing arrangement according to claim 3, wherein the length of the seal (35) is the same as the length of the radial sealing piece (32).

Technical Field

The invention relates to the technical field of air preheaters, in particular to a mechanical self-correcting air preheater sealing device.

Background

Under the hot running state of the air preheater, all parts of the air preheater expand due to heating, the rotor can be changed into a mushroom shape, and the gaps among the rotor, the sector plates and the arc plates can be changed. In a hot-state operation state, if the clearance is too large, the air leakage rate of the air preheater is high, and if the clearance is too small, the air preheater can be blocked. The air leakage rate of the air preheater is an important factor influencing the operation efficiency of the boiler, so that the sealing between air and flue gas is particularly important. At present, because the air preheater of a thermal power plant is unscientific and incomplete in sealing, serious air leakage problems exist mostly, the economic operation of a power plant is seriously influenced, and even the safe operation of a boiler is threatened, so that the effective technical improvement on an original sealing system of an air preheater is reluctant.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and further provides a mechanical self-correcting air preheater sealing device.

The utility model provides a machinery is from correction air preheater sealing device, includes central section of thick bamboo and sector plate, the sector plate is installed on the air preheater truss, and the air preheater truss is installed on the air preheater shell, and central section of thick bamboo and sector plate coaxial arrangement rotate for the sector plate, and central section of thick bamboo lateral wall circumference array has a plurality of sealing device, sealing device includes: the side wall of the central cylinder is vertically provided with the fixed sealing plate and the radial partition plate, a gap L is reserved between the upper end of the fixed sealing plate and the lower end face of the sector plate, the radial partition plate is positioned on the left side of the fixed sealing plate, and the radial sealing piece is arranged on the left side wall of the radial partition plate;

the sealing strip is arranged on the left side wall of the fixed sealing plate, the right end face of the radial sealing strip is attached to the sealing strip, and the fixed sealing plate, the radial sealing strip and the radial partition plate are circumferentially limited through a limiting device; the inner wall of the air preheater shell is circumferentially provided with an automatic correction groove, and the other end of the fixed sealing plate is arranged in the automatic correction groove.

Further, stop device includes limit threaded rod and internal thread stopper, it has the U type to lead to the groove to open on the fixed seal board, and limit threaded rod one end passes radial gasket radial baffle and the logical groove of U type in proper order, and limit threaded rod both ends are provided with the internal thread stopper and pass through internal thread stopper adjusting position limit point.

Further, the radial sealing piece is fixedly installed on the radial partition plate in a welding mode.

Further, the length of the sealing strip is the same as that of the radial sealing strip.

The invention has the beneficial effects that:

according to the invention, the fixed sealing plate is welded on the central cylinder, the fixed sealing plate cannot generate radial deformation due to the automatic correction groove, the mushroom-shaped deformation is generated only when the end parts of the radial partition plate and the radial sealing sheet descend, and the circumferential deformation is prevented by the limiting device in the deformation process, so that the sealing strip is always contacted with the radial sealing sheet, the problem of a wind leakage area cannot occur, and the safety is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention in a non-deformed state;

FIG. 2 is a schematic view showing the installation position of the weather strip of the present invention;

FIG. 3 is a schematic view of the U-shaped through slot machining position of the present invention;

FIG. 4 is a schematic view of the stop device of the present invention;

FIG. 5 is a schematic illustration of the invention in a deformed position;

FIG. 6 is a schematic view of the mounting position of the sector plates of the present invention;

in the figure, 1-a central cylinder, 2-a sector plate, 3-a sealing device, 31-a fixed sealing plate, 32-a radial sealing plate, 33-a radial clapboard, 34-a limiting device, 341-a limiting threaded rod, 342-an internal thread limiting block, 35-a sealing strip, 4-an air preheater shell, 5-an automatic correcting groove and 6-an air preheater truss.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.