CN214093530U

CN214093530U - Flue compensator

Info

Publication number: CN214093530U
Application number: CN202022520058.2U
Authority: CN
Inventors: 李清峰; 邱建全; 周爱民
Original assignee: Datang Anyang Power Generation Co ltd
Current assignee: Datang Anyang Power Generation Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-08-31
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a flue compensator, which relates to the technical field of flue equipment of thermal power plants, wherein thermal insulation materials are filled between an inner skin and each inner ring sleeve, so that high-temperature and corrosive substances can be separated from the inner skin to a certain extent, and a water storage chamber is arranged between the inner skin and an outer skin, so that the heat distribution on the skin is more uniform, thereby avoiding local overheating and corrosion of the skin at a certain point and avoiding local perforation and damage; when the pressure in the water storage chamber is too high, part of water can be discharged through the pressure release valve, so that the skin is protected by pressure release, and when the water in the water storage chamber is too low, water can be supplemented into the water storage chamber through the water adding port; the skin has an inner layer and an outer layer, even if the inner skin is damaged, the outer skin can still play a role in sealing, and the flue leakage cannot occur; the limiting rod can limit the compensation amplitude of the compensator in the radial direction, the axial direction and the angular direction to a certain extent, and the compensation of the compensator in the radial direction, the axial direction and the angular direction of the flue pipe is not influenced.

Description

Flue compensator

Technical Field

The utility model relates to a thermal power factory flue equipment technical field particularly, relates to a flue compensator.

Background

At present, the flue of a thermal power plant adopts skin compensators when being connected, the multidirectional displacement effect of the flue can be compensated in the operation process, the service life under the normal working condition can reach four to five years, the compensator which is leaked originally is dismantled normally, and a new complete compensator is fixed through welding or bolt connection.

The existing skin flue compensator has the following defects:

1) local high-temperature and corrosive substances exist in the flue, and can be in direct contact with the skin, so that local overheating and corrosion of a certain point of the skin can be caused, and then the skin is easy to perforate and damage;

2) only one layer of skin is generally adopted, and once the skin is damaged, flue leakage can occur;

3) a limit structure is lacked between flanges of a left flue pipe and a right flue pipe of the compensator, and the compensation amplitude of the compensator in the radial direction, the axial direction and the angular direction cannot be limited.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flue compensator, it can alleviate above-mentioned problem.

In order to alleviate the above-mentioned problem, the utility model discloses the technical scheme who takes as follows:

a flue compensator comprises a flue pipe I and a flue pipe II which are provided with flanges, an outer ring sleeve and an inner ring sleeve, wherein a skin is connected between the outer ring sleeve of the flue pipe I and the outer ring sleeve of the flue pipe II, the skin is pressed and fixed on the outer ring sleeve through bolts and pressing strips, the skin comprises an inner layer and an outer layer which are respectively an inner skin and an outer skin, a water storage chamber is formed between the inner skin and the outer skin, the outer skin is provided with a pressure release valve and a water filling port with a sealing cover, and the water filling port and the inlet of the pressure release valve are communicated with the water storage chamber; thermal insulation materials are filled between the inner skin and each inner ring sleeve; a limiting rod is connected between flanges of the flue pipe I and the flue pipe II, and the limiting rod has limited moving spaces in the axial direction, the radial direction and the angular direction relative to the flanges.

The utility model discloses an in the preferred embodiment, flue pipe II is provided with two inner ring covers, flue pipe I is provided with an inner ring cover, each inner ring cover coaxial arrangement, the inner ring cover of flue pipe I insert with between two inner ring covers of flue pipe II, the space between each inner ring cover to and outmost inner ring cover with all be provided with between the interior covering thermal insulation material.

In a preferred embodiment of the present invention, the skin extrusion edge of the pressing strip is processed into a fillet.

In a preferred embodiment of the present invention, a support plate is welded to the flange, and the flange is connected to the limit rod through the support plate; the support plate is provided with a through hole, and the limiting rod penetrates through the through hole and is in clearance fit with the through hole; the two ends of the limiting rod are both connected with circular limiting plates, a gap is reserved between each limiting plate and the corresponding flange, and the diameter of each limiting plate is larger than the aperture of the through hole.

In a preferred embodiment of the present invention, one end of the limiting plate is welded to the limiting rod, and the other end of the limiting plate is an internal thread annular plate connected to the limiting rod by a thread.

In a preferred embodiment of the present invention, the water inlet is disposed at the highest point of the outer skin, and the pressure release valve is disposed at the lowest point of the outer skin.

Compared with the prior art, the beneficial effects of the utility model are that: heat insulation materials are filled between the inner skin and each inner ring sleeve, high-temperature and corrosive substances can be separated from the inner skin to a certain extent, and a water storage chamber is arranged between the inner skin and the outer skin, so that heat on the skin is distributed more uniformly, local overheating and corrosion of a certain point of the skin are avoided, and local perforation and damage are avoided; when the pressure in the water storage chamber is too high, part of water can be discharged through the pressure release valve, so that the skin is protected by pressure release, and when the water in the water storage chamber is too low, water can be supplemented into the water storage chamber through the water adding port; the skin has an inner layer and an outer layer, even if the inner skin is damaged, the outer skin can still play a role in sealing, and the flue leakage cannot occur; be connected with the gag lever post between the flange of flue pipe I and flue pipe II, the gag lever post for the flange has the limited activity space of axial, radial and angular, can restrict the compensator at radial, axial and angular compensation range to a certain extent, does not also influence the radial, axial and angular compensation of compensator to the flue pipe.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional structure diagram of a flue compensator according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

in the figure: 1-flue pipe I, 2-flue pipe II, 3-inner ring sleeve, 4-flange, 5-water storage chamber, 6-water filling port, 7-limiting rod, 8-outer covering, 9-inner covering, 10-pressure relief valve, 11-heat insulation material, 12-fillet, 13-pressing strip, 14-bolt, 15-outer ring sleeve, 16-support plate, 17-through hole and 18-limiting plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, 2 and 3, the utility model discloses a flue compensator, which comprises a flue pipe I1 and a flue pipe II 2, wherein the flue pipe I1 and the flue pipe II are respectively provided with a flange 4, an outer ring sleeve 15 and an inner ring sleeve 3, a skin is connected between the flue pipe I1 and the outer ring sleeve 15 of the flue pipe II 2, the skin is fixedly pressed on the outer ring sleeve 15 through a bolt 14 and a pressing bar 13, the skin comprises an inner layer and an outer layer, namely an inner skin 9 and an outer skin 8, a water storage chamber 5 is formed between the inner skin 9 and the outer skin 8, the outer skin 8 is provided with a pressure release valve 10 and a water filling port 6 with a sealing cover, and the water filling port 6 and the inlet of the pressure release valve 10 are both communicated with the water storage chamber 5; heat insulation materials 11 are filled between the inner skin 9 and each inner ring sleeve 3; a limiting rod 7 is connected between the flanges 4 of the flue pipe I1 and the flue pipe II 2, and the limiting rod 7 has limited moving space in the axial direction, the radial direction and the angular direction relative to the flanges 4.

The utility model discloses in, follow flue pipe II 2 flow direction flue pipe I1 during the flow direction of flue pipe, innermost inner ring cover 3 is equivalent to the honeycomb duct. The smoke does not directly contact the inner skin 9 under the blocking action of the heat insulating material 11, and then the possibility that the inner skin 9 is damaged by corrosion and the structure is changed due to high temperature is reduced. The outer skin 8 is farther away from the flue gas than the inner skin 9, and is less prone to damage, the water medium between the inner skin 9 and the outer skin 8 enables the skin not to be heated up too fast, and the heat is distributed on the skin more uniformly.

When the compensator performs axial compensation on the flue, the limiting rod 7 can move in the axial limited movement space, so that the axial compensation action is not influenced, and when the axial compensation value exceeds the range of the axial limited movement space value of the limiting rod 7, the axial compensation value is limited by the limiting rod 7, so that the compensator is prevented from being damaged by stress;

when the compensator performs radial compensation on the flue, the limiting rod 7 can move in a radial limited movement space, so that the radial compensation action is not influenced, and when the radial compensation value exceeds the range of the value of the radial limited movement space of the limiting rod 7, the compensation is limited by the limiting rod 7, so that the compensator is prevented from being stressed and damaged;

when this compensator carries out angular compensation to the flue, gag lever post 7 can not cause the influence to the angular compensation action at the limited activity space activity of angular then, surpasss gag lever post 7 after the limited activity space value range of angular when the angular compensation value, then receives the restriction of gag lever post 7, prevents that the compensator atress from damaging.

In an optional embodiment of the utility model, flue pipe II 2 is provided with two inner cuffs 3, and flue pipe I1 is provided with an inner cuff 3, and each inner cuff 3 is coaxial to be arranged, and flue pipe I1's inner cuff 3 inserts and between two inner cuffs 3 of flue pipe II 2, the space between each inner cuff 3 to and all be provided with thermal insulation material 11 between outermost inner cuff 3 and interior covering 9.

In an alternative embodiment of the invention, the skin extrusion edge of the bead 13 is machined as a fillet 12.

Wherein the design of the rounded portion 12 avoids cutting the skin with sharp edges.

In an optional embodiment of the present invention, a support plate 16 is welded to the flange 4, and the flange 4 is connected to the limiting rod 7 through the support plate 16; the support plate 16 is provided with a through hole 17, and the limiting rod 7 penetrates through the through hole 17 and is in clearance fit with the through hole 17; the two ends of the limiting rod 7 are both connected with circular limiting plates 18, a gap is reserved between each limiting plate 18 and the flange 4, and the diameter of each limiting plate is larger than the aperture of the through hole 17.

The construction of this embodiment enables the stop rod 7 to have limited play in axial, radial and angular directions relative to the flange 4.

In this embodiment, the limiting plate 18 at one end is welded to the limiting rod 7, and the limiting plate 18 at the other end is an internally threaded annular plate in threaded connection with the limiting rod 7, so as to facilitate the assembly and disassembly of the limiting rod 7.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue compensator comprises a flue pipe I and a flue pipe II which are provided with flanges, an outer ring sleeve and an inner ring sleeve, wherein a skin is connected between the outer ring sleeve of the flue pipe I and the outer ring sleeve of the flue pipe II and is pressed and fixed on the outer ring sleeve through bolts and pressing strips; thermal insulation materials are filled between the inner skin and each inner ring sleeve; a limiting rod is connected between flanges of the flue pipe I and the flue pipe II, and the limiting rod has limited moving spaces in the axial direction, the radial direction and the angular direction relative to the flanges.

2. The flue compensator of claim 1, wherein the flue pipe II is provided with two inner sleeves, the flue pipe I is provided with one inner sleeve, the inner sleeves are coaxially arranged, the inner sleeve of the flue pipe I is inserted between the two inner sleeves of the flue pipe II, a gap between the inner sleeves is arranged, and the heat insulating material is arranged between the outermost inner sleeve and the inner skin.

3. The flue compensator of claim 1 wherein the skin extruded edge of the bead is radiused.

4. The flue compensator of claim 1, wherein a support plate is welded to the flange, and the flange is connected with the limit rod through the support plate; the support plate is provided with a through hole, and the limiting rod penetrates through the through hole and is in clearance fit with the through hole; the two ends of the limiting rod are both connected with circular limiting plates, a gap is reserved between each limiting plate and the corresponding flange, and the diameter of each limiting plate is larger than the aperture of the through hole.

5. The flue compensator of claim 4, wherein the limiting plate at one end is welded to the limiting rod, and the limiting plate at the other end is an internally threaded annular plate in threaded connection with the limiting rod.

6. The flue compensator of claim 1, wherein the filler is disposed at a highest point of the outer skin and the pressure relief valve is disposed at a lowest point of the outer skin.