CN210373526U

CN210373526U - Rolling flexible dynamic sealing device of air preheater

Info

Publication number: CN210373526U
Application number: CN201921141845.7U
Authority: CN
Inventors: 胡鹏
Original assignee: Jiangsu Huaxinyu Technology Co Ltd
Current assignee: Jiangsu Huaxinyu Technology Co Ltd
Priority date: 2019-07-19
Filing date: 2019-07-19
Publication date: 2020-04-21
Anticipated expiration: 2029-07-19

Abstract

The utility model relates to the technical field of flexible sealing of air preheaters, in particular to a rolling flexible dynamic sealing device of an air preheater, which is used for solving the defects of rapid abrasion, unreliable structure and insufficient clearance compensation quantity of the flexible sealing of the preheater in the prior art, and comprises a movable plate and a fixed plate, wherein the upper part of the fixed plate is connected and fixed with the bottom of the movable plate through a hinge shaft, both sides of the middle position of the movable plate are respectively provided with a roller clamping groove, rollers are arranged in the middle of the two roller clamping grooves through roller shafts, and spring positioning pins are welded at the two sides of the movable plate close to the edge, both sides of the fixed plate are respectively provided with a spring clamping block, the utility model not only reduces the degree of cutting abrasion, reduces the influence of the cutting abrasion on the running current of the air preheater, but also can obtain large-amplitude compensation performance and can completely adapt to the, the space utilization rate is high, and the sealing effect is good.

Description

Rolling flexible dynamic sealing device of air preheater

Technical Field

The utility model relates to an air heater flexible seal technical field especially relates to air heater rolling flexible dynamic seal device.

Background

The rotary air preheater is a heat exchange equipment for large power station boiler, and it uses the heat of boiler flue gas to heat the air required for combustion so as to raise the efficiency of boiler. The air preheater rotor is from cold attitude to hot attitude, because upper and lower both ends face temperature difference and steel are heated the back rigidity and weaken, produce "mushroom" and warp, if adopt traditional rigid seal piece, partly position (like axial and cold junction radial outside) clearance can diminish, and partly position (like hot junction radial outside) clearance can grow.

It will be appreciated that this in fact presents a problem: the sealed problem of air heater is the cooperation problem of gasket and sector plate, the gasket is automatic pastes tight sector plate and the automatic tracking gasket of sector plate and all can realize reducing the purpose of leaking out, nevertheless no matter reserve suitable cold attitude clearance at axial and cold junction radial position in engineering application, still compensate all the existing problems to the triangle area that leaks out that forms after the hot junction radial position is heated, and traditional flexible sealing technique more exposes wearing and tearing too fast, the structure is unreliable, the not enough scheduling problem of clearance compensation volume, can't satisfy the engineering requirement at all.

Disclosure of Invention

The utility model aims at solving the problem that the flexible seal of the preheater in the prior art still has the defects of quick abrasion, unreliable structure and insufficient clearance compensation amount, and the provided air preheater rolling flexible dynamic seal device.

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

air heater roll flexible dynamic seal device, including fly leaf and fixed plate, it is fixed to be connected through the hinge axle between the upper portion of fixed plate and the bottom of fly leaf, and the gyro wheel draw-in groove has all been seted up to the both sides of fly leaf intermediate position, and the gyro wheel is installed through the gyro wheel axle in the centre of two gyro wheel draw-in grooves to the both sides of fly leaf are close to the edge and all have welded the spring locating pin, the both sides of fixed plate all are provided with the spring fixture block, be provided with the spring between spring locating pin and the.

Preferably, the bottom of the movable plate and the top of the fixed plate are respectively arranged on two sides of the hinge shaft in a staggered manner.

Preferably, the positions of the spring positioning pin and the spring clamping block are in the same vertical plane.

Preferably, the top of the spring is fixedly sleeved on the outer wall of the spring positioning pin, and the bottom of the spring is fixedly installed in the middle of the spring clamping block.

The utility model discloses air heater roll flexible dynamic seal device replaces numerous flexible sealing device dry friction's mode and fly leaf or fixed plate contact with rolling mode, avoids having relative slip between roller contact surface and fly leaf or the fixed plate seal face, has reduced the degree of cutting wear greatly, and the rolling friction coefficient is less than the sliding friction coefficient far away, has also reduced its influence to air heater operating current, simultaneously, in limited installation space, the utility model discloses air heater roll formula elastic seal device can obtain compensation performance by a wide margin, can adapt to the change in sound clearance under the various different operating modes completely, and space utilization is high, and is sealed effectual.

Drawings

Fig. 1 is a front view of the rolling flexible dynamic sealing device of the air preheater provided by the utility model;

FIG. 2 is a side view of the spring mounting of the rolling flexible dynamic sealing device of the air preheater of the present invention;

fig. 3 is a side view of the roller mounting of the rolling flexible dynamic sealing device of the air preheater of the present invention.

In the figure: the device comprises a movable plate 1, a roller clamping groove 11, a spring positioning pin 12, a fixed plate 2, a roller 3, a roller shaft 31, a hinge shaft 4, a spring clamping block 5 and a spring 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the rolling flexible dynamic sealing device of the air preheater comprises a movable plate 1 and a fixed plate 2, the upper portion of the fixed plate 2 is fixedly connected with the bottom of the movable plate 1 through a hinge shaft 4, roller clamping grooves 11 are formed in two sides of the middle position of the movable plate 1, the roller clamping grooves 11 are used for installing and fixing rollers 3, the rollers 3 are installed in the middle of the two roller clamping grooves 11 through roller shafts 31, the roller shafts 31 aim to install the rollers 3 in the roller clamping grooves 11 conveniently, spring positioning pins 12 are welded on two sides of the movable plate 1 close to the edges, spring clamping blocks 5 are arranged on two sides of the fixed plate 2, springs 6 are arranged between the spring positioning pins 12 and the spring clamping blocks 5, and the spring positioning pins 12 and the spring clamping blocks 5 are used for limiting the springs.

The bottom of the movable plate 1 and the top of the fixed plate 2 are respectively arranged on two sides of the hinge shaft 4 in a staggered manner, the spring positioning pins 12 and the spring clamping blocks 5 are positioned in the same vertical plane, the outer walls of the spring positioning pins 12 are fixedly sleeved at the top of the spring 6, and the bottom of the spring 6 is fixedly installed in the middle of the spring clamping blocks 5.

In this embodiment, the roller shaft 31 penetrates the middle of the roller 3, and the two ends of the roller shaft 31 are respectively clamped in the roller clamping grooves 11 at the two sides, the roller 3 is fixed between the two roller clamping grooves 11, then the top of the spring 6 is sleeved outside the spring positioning pin 12, and the bottom thereof is fixedly assembled with the spring clamping block 5 through the fixing pin.

When the movable plate 1 is in work, the movable plate 1 is stressed to rotate downwards to one side close to the fixed plate 2, the spring 6 is stressed and extruded along with the downward rotation of the movable plate, and when the extrusion reaches the maximum deformation amount, the spring 6 applies a reaction force to jack the movable plate 1 back, so that the movable plate 1 can be reset.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. Air heater rolls flexible dynamic seal device, including fly leaf (1) and fixed plate (2), its characterized in that, be connected fixedly through hinge shaft (4) between the upper portion of fixed plate (2) and the bottom of fly leaf (1), gyro wheel draw-in groove (11) have all been seted up to the both sides of fly leaf (1) intermediate position, and gyro wheel (3) are installed through gyro wheel axle (31) in the centre of two gyro wheel draw-in grooves (11) to the both sides of fly leaf (1) are close to the edge and all have welded spring locating pin (12), the both sides of fixed plate (2) all are provided with spring fixture block (5), be provided with spring (6) between spring locating pin (12) and spring fixture block (5).

2. An air preheater rolling flexible dynamic sealing device as claimed in claim 1, wherein the bottom of the movable plate (1) and the top of the fixed plate (2) are respectively arranged on both sides of the hinge shaft (4) in a staggered manner.

3. An air preheater rolling flexible dynamic sealing device as claimed in claim 1, wherein the positions of the spring positioning pin (12) and the spring clamping block (5) are in the same vertical plane.

4. The rolling flexible dynamic sealing device of the air preheater as claimed in claim 1, wherein the top of the spring (6) is fixedly sleeved on the outer wall of the spring positioning pin (12), and the bottom of the spring (6) is fixedly installed in the middle of the spring clamping block (5).