CN215174943U

CN215174943U - Seal structure capable of absorbing bidirectional expansion

Info

Publication number: CN215174943U
Application number: CN202120537022.7U
Authority: CN
Inventors: 方小里; 唐卉; 刘彬超; 李明; 沈洁; 姜丘陵; 李玉伟; 李玉彪; 高嘉楠; 刘鹏; 高宁; 毕艳飞; 李月
Original assignee: Harbin Boiler Co Ltd
Current assignee: Harbin Boiler Co Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2021-12-14
Anticipated expiration: 2031-03-15

Abstract

The utility model provides an absorb two-way expanded seal structure, relates to a pressure vessel seal structure to solve waste heat boiler because do not solve well radial, the axial expansion difference between inner tube, the urceolus diaphragm type wall, produce huge local stress, lead to the weak region of seal structure to take place to tear, leak, influence the normal safe operation of equipment, forced blowing out's problem. The utility model comprises an outer cylinder membrane wall, an inner cylinder membrane wall, an outer cylinder annular plate, an inner cylinder annular plate and a sealing ring with a corrugated cross section; the outer barrel ring plate is welded and fixed on the inner surface of the outer barrel membrane wall in a sealing mode, the inner barrel ring plate is welded and fixed on the outer surface of the inner barrel membrane wall in a sealing mode, and a corrugated sealing ring is welded between the outer barrel ring plate and the inner barrel ring plate in a sealing mode. The utility model discloses the sealing ring of the corrugated shape that sets up can absorb axial and fore-and-aft inflation, eliminates because the local stress that the poor and operation vibration of high temperature expansion arouses, guarantees that operation in-process seal structure can not take place to destroy because of the poor emergence of inflation.

Description

Seal structure capable of absorbing bidirectional expansion

Technical Field

The utility model relates to a seal structure of boiler and chemical industry exhaust-heat boiler, concretely relates to absorb two-way expanded seal structure.

Background

In recent years, with the rapid development of the coal chemical industry in China, the national requirements for improving the system efficiency and the energy efficiency of coal conversion and reducing the emission of pollutants are higher and higher, and the high-efficiency coal gasification technology is the trend of the development of the modern large-scale coal chemical industry. Therefore, the waste heat boiler process is adopted on the basis of the traditional coal gasification technology, the sensible heat of the synthesis gas can be recovered, the system circulation efficiency of the coal gasification process is further improved, and the market development prospect is wide.

For the waste heat boiler, heating surfaces (a cylindrical/polygonal membrane water-cooled wall, a water-cooled screen and the like) are arranged inside a pressure shell of the waste heat boiler and are respectively hung on the pressure shell through the upper parts to form a closed synthesis gas channel, and the heating surfaces directly contact high-temperature synthesis gas for heat exchange; in order to sufficiently recover the sensible heat of the high-temperature synthesis gas, a double-layer cylindrical membrane wall (hereinafter, referred to as an inner-cylinder membrane wall and an outer-cylinder membrane wall, respectively) structure is often adopted. Because the temperature of the synthesis gas contacted with the membrane walls of the inner cylinder and the outer cylinder is different, the hanging height is different, the diameters of the cylinders are different, and the radial expansion and the axial expansion of the inner cylinder and the outer cylinder are different in the normal operation process, so that the design of the sealing structure between the membrane walls of the inner cylinder and the outer cylinder is difficult. At present, because the radial and axial expansion differences between the membrane walls of the inner cylinder and the outer cylinder are not well solved, huge local stress is generated, so that the weak area of the sealing structure is torn and leaked, the normal and safe operation of equipment is influenced, and the boiler is forced to be shut down.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve waste heat boiler because do not have the radial, axial expansion difference between fine solution inner tube, urceolus diaphragm type wall, produce huge local stress, lead to seal structure's weak region to take place to tear, leak, influence the normal safe operation of equipment, the problem of being forced to the blowing out, and provide an absorption two-way expanded seal structure.

The utility model discloses a solve the technical scheme that above-mentioned technical problem took and be:

a sealing structure for absorbing bidirectional expansion comprises an outer cylinder membrane wall, an inner cylinder membrane wall, an outer cylinder annular plate, an inner cylinder annular plate and a sealing ring with a corrugated cross section;

the outer barrel ring plate is welded and fixed on the inner surface of the outer barrel membrane wall in a sealing mode, the inner barrel ring plate is welded and fixed on the outer surface of the inner barrel membrane wall in a sealing mode, and a corrugated sealing ring is welded between the outer barrel ring plate and the inner barrel ring plate in a sealing mode.

Preferably, the outer surface of the outer cylinder ring plate is uniformly provided with a plurality of through grooves along the circumferential direction, and the shape of the outer surface of the outer cylinder ring plate is matched with the shape of the inner surface of the outer cylinder membrane wall.

Preferably, the inner surface of the inner cylinder annular plate is uniformly provided with a plurality of through grooves along the circumferential direction, and the shape of the inner surface of the through grooves is matched with that of the outer surface of the inner cylinder membrane wall.

Preferably, the inner and outer cylindrical ring plates are not coplanar.

Preferably, the wavelength direction of the seal ring, the axial direction of the seal ring, and the directions of the center line of the outer cylinder film wall and the center line of the inner cylinder film wall coincide with each other.

Preferably, the height between the inner and outer collar plates is greater than or equal to the wavelength of the seal ring.

Preferably, the wavelength direction of the sealing ring is perpendicular to the axial direction of the sealing ring, and the axial direction of the sealing ring, the central line of the outer cylinder membrane wall and the central line of the inner cylinder membrane wall are consistent in direction.

Compared with the prior art, the utility model following beneficial effect has:

the utility model discloses the sealing ring of the corrugated that sets up can absorb axial and fore-and-aft inflation, eliminates because the local stress that the poor and operation vibration of high temperature expansion arouses, guarantees that operation in-process seal structure can not take place to destroy because of the poor emergence of inflation, can not tear the heating surface heat exchange tube scheduling problem.

Drawings

Fig. 1 is a schematic view of the present invention;

FIG. 2 is a front view of the inner barrel ring plate;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

FIG. 4 is a front view of the outer collar plate;

FIG. 5 is an enlarged view of a portion of FIG. 4 at II;

FIG. 6 is a schematic of an inner C-shaped collar;

FIG. 7 is a schematic of an outer C-shaped collar;

FIG. 8 is a schematic view of a seal ring;

fig. 9 is a schematic view of another form of the present invention.

Reference numbers in the figures:

10-outer cylinder membrane wall; 20-inner cylinder membrane type wall; 30-outer cylinder ring plate; 40-inner cylinder ring plate; 50-a sealing ring; 60-corrugated cylinder.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

Example 1: the present embodiment will be described below with reference to fig. 1 to 8, and relates to a sealing structure that absorbs two-way expansion, as shown in fig. 1, including an outer cylinder membrane wall 10, an inner cylinder membrane wall 20, an outer cylinder ring plate 30, an inner cylinder ring plate 40, and a seal ring 50 having a corrugated cross section;

the outer cylinder annular plate 30 is welded and fixed on the inner surface of the outer cylinder membrane wall 10 in a sealing mode, the inner cylinder annular plate 40 is welded and fixed on the outer surface of the inner cylinder membrane wall 20 in a sealing mode, and the corrugated sealing ring 50 is welded and fixed between the outer cylinder annular plate 30 and the inner cylinder annular plate 40 in a sealing mode.

As shown in fig. 4 and 5, a plurality of through grooves are uniformly formed on the outer surface of the outer cylindrical ring plate 30 along the circumferential direction, and the outer surface shape of the through grooves is matched with the inner surface of the outer cylindrical membrane wall 10, so as to ensure the sealing of the root of the membrane wall.

As shown in fig. 2 and 3, a plurality of through grooves are uniformly formed in the inner surface of the inner cylindrical ring plate 40 along the circumferential direction, and the shape of the inner surface of the through grooves is matched with the outer surface of the inner cylindrical membrane wall 20, so that the root of the membrane wall is sealed.

Fig. 6 is a schematic view showing an inner C-shaped ring pipe, wherein the inner surface of the inner C-shaped ring pipe faces outward, fig. 7 is a schematic view showing an outer C-shaped ring pipe, the inner surface of the outer C-shaped ring pipe faces inward, the ends of the inner C-shaped ring pipe and the outer C-shaped ring pipe are butted and then welded to form a sealing ring 50, and the welded structure is shown in fig. 8, wherein the number of the inner C-shaped ring pipe and the outer C-shaped ring pipe is not unique, and may be a plurality of inner C-shaped ring pipes and outer C-shaped ring pipes which are welded, specifically, according to the amount of expansion caused by heat.

To further increase the amount of axial expansion, the inner and outer collars 40, 30 are not coplanar as shown in FIG. 1.

One implementation of this embodiment may be: the wavelength direction of the seal ring 50, the axial direction of the seal ring 50, and the directions of the center line of the outer cylindrical film wall 10 and the center line of the inner cylindrical film wall 20 are aligned. The seal ring 50 can provide an axial and longitudinal compensation when the outer and inner cylindrical membrane walls 10, 20 expand when heated.

Inner tube crown plate 40 with highly be greater than or equal to between outer cylinder crown plate 30 the wavelength of sealing ring 50, the utility model discloses can set up the ripple length of sealing ring 50 according to actual inflation volume.

As shown in fig. 9, an implementation manner of this embodiment may further be: the wavelength direction of the seal ring 50 is perpendicular to the axial direction of the seal ring 50, and the axial direction of the seal ring 50, the center line of the outer cylinder film wall 10 and the center line of the inner cylinder film wall 20 are in the same direction. The outer cylindrical ring plate 30 may be welded to one end of the bellows 60, the other end of the bellows 60 is welded to the sealing ring 50, and the sealing ring 50 is welded to the inner cylindrical ring plate 40. The bellows 60 and the seal ring 50 together provide an amount of axial and longitudinal compensation. Wherein the bellows 60 can be replaced by a cylinder, and the height is determined by calculation according to the expansion amount of the actual situation.

Although the present invention has been described in detail with reference to certain specific embodiments, it will be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A kind of absorption two-way expanded hermetically-sealed construction, characterized by: comprises an outer cylinder membrane wall (10), an inner cylinder membrane wall (20), an outer cylinder annular plate (30), an inner cylinder annular plate (40) and a sealing ring (50) with a corrugated cross section;

the outer cylinder annular plate (30) is welded and fixed on the inner surface of the outer cylinder membrane wall (10) in a sealing mode, the inner cylinder annular plate (40) is welded and fixed on the outer surface of the inner cylinder membrane wall (20) in a sealing mode, and the corrugated sealing ring (50) is welded and fixed between the outer cylinder annular plate (30) and the inner cylinder annular plate (40) in a sealing mode.

2. A seal structure absorbing two-way expansion according to claim 1, wherein: the outer surface of the outer cylinder annular plate (30) is uniformly provided with a plurality of through grooves along the circumferential direction, and the shape of the outer surface of the outer cylinder annular plate is matched with the shape of the inner surface of the outer cylinder membrane wall (10).

3. A seal structure absorbing two-way expansion according to claim 1, wherein: the inner surface of the inner cylinder annular plate (40) is uniformly provided with a plurality of through grooves along the circumferential direction, and the shape of the inner surface of the through grooves is matched with that of the outer surface of the inner cylinder membrane wall (20).

4. A seal structure absorbing two-way expansion according to claim 1, wherein: the inner cylindrical ring plate (40) and the outer cylindrical ring plate (30) are not coplanar.

5. A seal structure absorbing two-way expansion according to claim 1, wherein: the wavelength direction of the seal ring (50), the axial direction of the seal ring (50), and the directions of the center line of the outer cylinder membrane wall (10) and the center line of the inner cylinder membrane wall (20) are coincident with each other.

6. A seal structure absorbing two-way expansion according to claim 1 or 5, wherein: the height between the inner cylindrical ring plate (40) and the outer cylindrical ring plate (30) is greater than or equal to the wavelength of the seal ring (50).

7. A seal structure absorbing two-way expansion according to claim 1, wherein: the wavelength direction of the sealing ring (50) is vertical to the axial direction of the sealing ring (50), and the axial direction of the sealing ring (50), the central line of the outer cylinder membrane wall (10) and the central line of the inner cylinder membrane wall (20) are consistent.