Air pre-heater cold end turbulent flow sealing structure

Abstract

The utility model discloses an air pre-heater cold end turbulent flow sealing structure, which belongs to the related technical field of air pre-heaters, and comprises a spoiler and a cold end fan-shaped plate arranged below the spoiler, the bottom end of the spoiler is provided with a connecting plate, the bottom of the connecting plate is symmetrically and fixedly connected with shaft sleeves, and the shaft sleeves are fixedly connected with the spoiler. A sealing piece with the bottom end of an arc-shaped structure is arranged below the shaft sleeve at an angle, shaft heads rotationally connected with the shaft sleeve are symmetrically installed at the top end of the sealing piece, wheel grooves are symmetrically formed in the bottom end of the sealing piece, and shaft seats fixedly connected with the sealing piece are arranged on the two sides of the axial direction of the wheel grooves correspondingly. The friction force between the sealing piece and the cold-end fan-shaped plate can be effectively reduced, so that the abrasion between the sealing piece and the cold-end fan-shaped plate is reduced, frequent replacement is not needed, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the related technical field of air preheater, more particularly to an air preheater cold end turbulence sealing structure. BACKGROUND

[0002] Air preheater is the flue gas in the tail of the boiler passes through the inside heat sink and preheats the air before entering the boiler to a certain temperature, which is a kind of equipment for improving the heat exchange performance of the boiler and reducing energy consumption.

[0003] The air preheater cold end sealing refers to the sealing device installed in the cold end part of the air preheater, which mainly prevents air from leaking from the upper and lower ends of the rotor outer cylinder to the gap between the rotor outer cylinder and the air preheater shell, thereby reducing the air leakage rate and improving the thermal efficiency of the boiler.

[0004] The existing air preheater cold end sealing requires double-gap turbulence flexible sealing sheet to be set on the basis of conventional sealing sheet to reduce air leakage and prolong the service life of soft sealing, and the main friction between the fan-shaped plate and the sealing sheet is static friction, so the wear of the sealing sheet is large, frequent replacement is required, and the production cost is increased, so the air preheater cold end turbulence sealing structure is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] 1. TECHNICAL PROBLEM TO BE SOLVED

[0006] In view of the problems in the prior art, the purpose of the utility model is to provide an air preheater cold end turbulence sealing structure, which can effectively reduce the friction between the sealing sheet and the cold end fan-shaped plate, thereby reducing the wear between the sealing sheet and the cold end fan-shaped plate, without frequent replacement, and reducing the production cost.

[0007] 2. TECHNICAL SCHEME

[0008] To solve the above problems, the utility model adopts the following technical scheme.

[0009] An air preheater cold end turbulence sealing structure, comprising a turbulence sheet and a cold end fan-shaped plate installed below the turbulence sheet, a connecting plate is installed at the bottom end of the turbulence sheet, and the bottom of the connecting plate is fixedly connected with a shaft sleeve in a symmetrical manner;

[0010] An arc-shaped sealing sheet is arranged below the shaft sleeve in an angular manner, the top end of the sealing sheet is symmetrically installed with a shaft head rotatably connected with the shaft sleeve, the bottom end of the sealing sheet is symmetrically provided with a wheel groove, and the two sides of the wheel groove in the axial direction are provided with shaft seats fixedly connected with the sealing sheet, and a roller is rotatably connected between the shaft seats.

[0011] The upper portion of the shaft sleeve is provided with a first connecting shaft rod fixedly connected with the connecting plate, the lower portion of the first connecting shaft rod is provided with a second connecting shaft rod fixedly connected with the sealing sheet, a sleeve is installed at the first connecting shaft rod, an extension rod is installed at the second connecting shaft rod, the end of the extension rod away from the second connecting shaft rod is connected with a baffle arranged in the inner cavity of the sleeve and in a circular structure, and a spring is installed on the inner side of the sleeve.

[0012] Further, the shaft seat is provided with a shaft hole, and the surface of the roller is provided with an axle fixedly connected with the shaft hole.

[0013] Further, the bottom end of the sealing sheet is tangent to the outer wall of the roller.

[0014] Further, the end portion of the sleeve is provided with a first connecting lug rotationally connected with the first connecting shaft rod.

[0015] The end portion of the extension rod is provided with a second connecting lug rotationally connected with the second connecting shaft rod.

[0016] Further, the end portion of the sleeve is provided with a limiting plate arranged in an annular structure, and the inner diameter of the limiting plate is smaller than the outer diameter of the baffle.

[0017] Further, one end of the spring is connected with the baffle, and the other end of the spring is connected with the inner end wall of the sleeve.

[0018] Further, the sealing sheet is made of steel, and the included angle between the sealing sheet and the connecting plate is 120°.

[0019] Further, the side wall of the cold end fan-shaped plate is provided with a pressure-reducing spoiler arranged in a right-angle bending structure, and the bending front end of the pressure-reducing spoiler is provided with a chamfer.

[0020] 3. Beneficial effects

[0021] Compared with the prior art, the present application has the following advantages:

[0022] In the present application, the included angle between the sealing sheet and the connecting plate is reduced, the spring is compressed by the baffle, the bottom end of the sealing sheet is always attached to the upper surface of the cold end fan-shaped plate by the elastic force of the spring, the space between the adjacent two spoilers is sealed, the roller at the bottom of the sealing sheet rolls under the friction of the cold end fan-shaped plate and the shaft seat, the friction between the sealing sheet and the cold end fan-shaped plate is effectively reduced, the abrasion between the sealing sheet and the cold end fan-shaped plate is reduced, the sealing sheet does not need to be frequently replaced, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1It is a three-dimensional structure schematic view of the utility model;

[0024] Figure 2 It is a connecting plate and sealing sheet connecting schematic view of the utility model;

[0025] Figure 3 It is a connecting plate structure schematic view of the utility model;

[0026] Figure 4 It is a sealing sheet structure schematic view of the utility model;

[0027] Figure 5 It is a roller structure schematic view of the utility model;

[0028] Figure 6 It is a sleeve internal structure schematic view of the utility model;

[0029] Figure 7 It is a cold end fan-shaped plate structure schematic view of the utility model.

[0030] Mark explanation in the drawing:

[0031] Spoiler; 2, cold end fan-shaped plate; 3, connecting plate; 4, shaft sleeve; 5, sealing sheet; 6, shaft head; 7, wheel groove; 8, shaft seat; 9, roller; 10, first connecting shaft; 11, second connecting shaft; 12, sleeve; 13, telescopic rod; 14, baffle; 15, spring; 16, pressure relief spoiler. Specific implementation

[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model; Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments; Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model. Embodiment

[0033] Please refer to Figures 1-7 A kind of air preheater cold end spoiler sealing structure, including spoiler 1 and the cold end fan-shaped plate 2 of installation below spoiler 1, the bottom end of spoiler 1 is installed with connecting plate 3, the bottom of connecting plate 3 is fixedly connected with the shaft sleeve 4 of symmetry;

[0034] The bottom of shaft sleeve 4 is symmetrically provided with the sealing sheet 5 of the bottom end arc structure, the top end of sealing sheet 5 is symmetrically installed with the shaft head 6 of rotationally connected with shaft sleeve 4, the bottom end of sealing sheet 5 is symmetrically provided with wheel groove 7, both sides of wheel groove 7 axial direction are provided with the shaft seat 8 of fixedly connected with sealing sheet 5, and the roller 9 of rotationally connected between shaft seat 8;

[0035] The upper portion of the shaft sleeve 4 is provided with a first connecting shaft 10 fixedly connected with the connecting plate 3, the lower portion of the first connecting shaft 10 is provided with a second connecting shaft 11 fixedly connected with the sealing sheet 5, a sleeve 12 is installed at the first connecting shaft 10, an extension rod 13 is installed at the second connecting shaft 11, the end of the extension rod 13 away from the second connecting shaft 11 is connected with a baffle 14 in the inner cavity of the sleeve 12 and arranged in a circular structure, and a spring 15 is installed at the inner side of the sleeve 12;

[0036] The side wall of the cold end fan-shaped plate 2 is provided with a pressure relief spoiler 16 arranged in a right angle bending structure, and the bending front end of the pressure relief spoiler 16 is provided with a chamfer;

[0037] It should be noted that, in use, the cold end fan-shaped plate 2 is rotated, the pressure relief spoiler 16 is attached to the sealing sheet 5, at this time, the shaft head 6 is rotated in cooperation with the shaft sleeve 4, and the sleeve 12 and the end of the extension rod 13 are respectively rotated in cooperation with the first connecting shaft 10 and the second connecting shaft 11, as the included angle between the sealing sheet 5 and the connecting plate 3 decreases, the spring 15 is compressed by the baffle 14, and the bottom end of the sealing sheet 5 is always attached to the upper surface of the cold end fan-shaped plate 2 by the elastic force of the spring 15, thereby sealing the space between the two adjacent spoilers 1, and the roller 9 at the bottom of the sealing sheet 5 rolls in cooperation with the shaft seat 8 under the friction of the cold end fan-shaped plate 2, which can effectively reduce the friction between the sealing sheet 5 and the cold end fan-shaped plate 2, thereby reducing the wear between the sealing sheet 5 and the cold end fan-shaped plate 2, and the sealing sheet 5 does not need to be frequently replaced, thereby reducing the production cost.

[0038] As shown in Figure 2 , Figure 4 , Figure 5 , an axle hole is formed at the shaft seat 8, a wheel shaft is installed at the surface of the roller 9 and connected with the axle hole in plug connection, and the bottom end of the sealing sheet 5 is tangent to the outer wall of the roller 9;

[0039] It should be noted that, by attaching the bottom end of the sealing sheet 5 to the upper surface of the cold end fan-shaped plate 2, the space between the two adjacent spoilers 1 is sealed, and the roller 9 at the bottom of the sealing sheet 5 rolls in cooperation with the shaft seat 8 under the friction of the cold end fan-shaped plate 2, which can effectively reduce the friction between the sealing sheet 5 and the cold end fan-shaped plate 2.

[0040] As shown in Figure 2 , a first connecting lug is installed at the end of the sleeve 12 and rotatably connected with the first connecting shaft 10;

[0041] A second connecting lug is installed at the end of the extension rod 13 and rotatably connected with the second connecting shaft 11;

[0042] It needs to be explained that the first connecting lug and the second connecting lug rotate respectively with the first connecting shaft 10 and the second connecting shaft 11, and are used for matching the angle change between the connecting plate 3 and the sealing sheet 5.

[0043] As shown in Figure 6 The end part of the sleeve 12 is provided with a limiting plate in an annular structure, and the inner diameter of the limiting plate is smaller than the outer diameter of the baffle 14; one end of the spring 15 is connected with the baffle 14, and the other end of the spring 15 is connected with the inner end wall of the sleeve 12.

[0044] It needs to be explained that under the elastic force of the spring 15, the baffle 14 abuts against the limiting plate, thereby limiting the telescopic rod 13 and preventing the telescopic rod 13 from separating from the sleeve 12.

[0045] As shown in Figure 2 The material of the sealing sheet 5 is steel, and the included angle between the sealing sheet 5 and the connecting plate 3 is 120°.

[0046] In use: the cold end sector plate 2 rotates, the pressure relief spoiler 16 is attached to the sealing sheet 5, at this time the shaft head 6 is matched with the shaft sleeve 4 to rotate, and the sleeve 12 and the telescopic rod 13 are matched with the first connecting shaft 10 and the second connecting shaft 11 to rotate respectively; as the included angle between the sealing sheet 5 and the connecting plate 3 decreases, the spring 15 is compressed by the baffle 14, and the bottom end of the sealing sheet 5 is always attached to the upper surface of the cold end sector plate 2 by the elastic force of the spring 15, thereby sealing the space between the two adjacent spoilers 1, and the roller 9 at the bottom of the sealing sheet 5 rolls under the friction of the cold end sector plate 2 and cooperates with the shaft seat 8.

[0047] The above is only a preferred specific embodiment of the present application; however, the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An air preheater cold end spoiler seal structure, comprising a spoiler (1) and a cold end sector plate (2) installed below the spoiler (1), characterized in that: The bottom end of the spoiler (1) is provided with a connecting plate (3), and the bottom of the connecting plate (3) is symmetrically and fixedly connected with a shaft sleeve (4); The bottom end of the shaft sleeve (4) is provided with a sealing sheet (5) with an arc-shaped structure, the top end of the sealing sheet (5) is symmetrically provided with a shaft head (6) rotatably connected with the shaft sleeve (4), the bottom end of the sealing sheet (5) is symmetrically provided with a wheel groove (7), and the two sides of the wheel groove (7) in the axial direction are provided with shaft seats (8) fixedly connected with the sealing sheet (5), and the shaft seats (8) are rotatably connected with a roller (9). The top of the shaft sleeve (4) is provided with a first connecting shaft (10) fixedly connected with the connecting plate (3), the bottom of the first connecting shaft (10) is provided with a second connecting shaft (11) fixedly connected with the sealing sheet (5), the first connecting shaft (10) is provided with a sleeve (12), the second connecting shaft (11) is provided with an extension rod (13), one end of the extension rod (13) away from the second connecting shaft (11) is connected with a baffle (14) in the inner cavity of the sleeve (12) and provided with a circular structure, and the inner side of the sleeve (12) is provided with a spring (15).

2. The seal structure according to claim 1, wherein: The shaft seat (8) is provided with a shaft hole, and the surface of the roller (9) is provided with an axle inserted and connected with the shaft hole.

3. The seal structure according to claim 1, wherein: The bottom end of the sealing sheet (5) is tangent to the outer wall of the roller (9).

4. The seal structure according to claim 1, wherein: The end of the sleeve (12) is provided with a first connecting lug rotatably connected with the first connecting shaft (10); The end of the extension rod (13) is provided with a second connecting lug rotatably connected with the second connecting shaft (11).

5. The cold end turbulence seal for an air preheater as set forth in claim 1, wherein: The end of the sleeve (12) is provided with a limiting plate provided with a ring structure, and the inner diameter of the limiting plate is smaller than the outer diameter of the baffle (14).

6. The cold end turbulence seal for an air preheater as set forth in claim 1, wherein: One end of the spring (15) is connected with the baffle (14), and the other end of the spring (15) is connected with the inner end wall of the sleeve (12).

7. The seal structure according to claim 1, wherein: The material of the sealing sheet (5) is steel, and the included angle between the sealing sheet (5) and the connecting plate (3) is 120°.

8. The cold end turbulence seal for an air preheater as set forth in claim 1, wherein: The side wall of the cold end fan-shaped plate (2) is provided with a pressure relief spoiler (16) provided with a right-angle bending structure, and the bending front end of the pressure relief spoiler (16) is provided with a chamfer.

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