CN219530172U - Metal corrugated expansion joint for high-temperature-resistant electric furnace flue gas pipeline - Google Patents

Abstract

The utility model relates to the technical field of metal corrugated expansion joints, in particular to a metal corrugated expansion joint for a high-temperature-resistant electric furnace flue gas pipeline, which comprises a central pipe A and a central pipe B, wherein a corrugated pipe is arranged between the opposite sides of the central pipe A and the central pipe B, a guide cylinder is arranged on the inner side wall of the corrugated pipe, a movable baffle plate is arranged on one side, close to the corrugated pipe, of the central pipe B, a vertical plate is arranged on the right side of the movable baffle plate, a diversion heat insulation cotton is arranged between the opposite sides of the vertical plate and the movable baffle plate, and the corrugated pipe, the guide cylinder, the movable baffle plate, the vertical plate, the expansion heat insulation cotton and the diversion heat insulation cotton are arranged to provide a double-layer heat insulation function.

Description

Metal corrugated expansion joint for high-temperature-resistant electric furnace flue gas pipeline

Technical Field

The utility model relates to the technical field of metal corrugated expansion joints, in particular to a metal corrugated expansion joint for a high-temperature-resistant electric furnace flue gas pipeline.

Background

Operating parameters of the flue gas pipeline for electric furnace steelmaking: (actual data of a Steel works of a certain iron and Steel company)

Pipe medium: CO2, CO, O2, N2, dust, scrap iron and the like;

medium temperature: 500-800 ℃. The instantaneous high temperature can reach about 1000 ℃ and the duration time is about 10 minutes;

medium flow rate: the medium is flushed with the pipeline expansion joint at 20 m/s;

the explosion phenomenon exists in the pipeline, the explosion impacts the expansion joint of the pipeline, and the pipeline vibrates and deforms.

The traditional expansion joint of the flue gas pipeline adopts a structure with a built-in guide cylinder and filled with heat insulation cotton. The material of the guide cylinder is 321 or 310S material which is high temperature resistant. When the pipeline runs, the high-speed flowing medium is seriously scoured on the pipeline, and the material strength is low due to the high temperature, so that the guide cylinder is worn out after being used for 1-2 years.

Because the pipeline is in a negative pressure state, the heat insulation cotton filled between the guide cylinder and the corrugated pipe is quickly pumped away, so that the temperature of the corrugated pipe is too high, the fatigue life is greatly reduced, the guide cylinder of the expansion joint of the flue gas pipeline is seriously worn, the heat insulation cotton in the expansion joint is pumped away, the temperature of the corrugated pipe is too high, and the service life is short.

Disclosure of Invention

Based on the expression, the utility model provides the metal corrugated expansion joint for the high-temperature-resistant electric furnace flue gas pipeline, so as to solve the defects in the prior art.

The technical scheme for solving the technical problems is as follows:

the utility model provides a high temperature resistant electric stove is metal ripple expansion joint for flue gas pipeline, includes center tube A, center tube B, be equipped with the bellows between the opposite one side of center tube A, center tube B, be equipped with the draft tube on the inside wall of bellows, one side that center tube B is close to the bellows is equipped with movable baffle, center tube B's inboard just is located movable baffle's right side and is equipped with the riser, be equipped with the thermal-insulated cotton of inflation between riser and the opposite one side of movable baffle.

On the basis of the technical scheme, the utility model can be improved as follows.

Furthermore, the inner side of the corrugated pipe is filled with diversion heat insulation cotton.

Furthermore, the inner side walls of the central tube A, the central tube B and the corrugated tube are coated with high-strength and high-resistance coatings.

Further, the high-strength impact-resistant refractory coating is made of a high-strength impact-resistant refractory mixed material.

Further, the guide cylinder is made of a common carbon steel member.

Further, the outside of center tube A, center tube B all is equipped with a plurality of mounting panels, one side of mounting panel rotates to be connected and is equipped with the threaded rod, the outside threaded connection of threaded rod is equipped with two nuts.

Compared with the prior art, the technical scheme of the utility model has the following beneficial technical effects:

through setting up bellows, draft tube, adjustable fender, riser, expansion heat-proof cotton, the heat-proof cotton of water conservancy diversion, provide a double-deck thermal-insulated function, avoid the bellows high temperature, the life-span shortens, through setting up high-strength resistant coating, reducible draft tube's wearing and tearing to improve life, this high temperature resistant electric stove is metal corrugated expansion joint for flue gas pipeline has double-deck thermal-insulated effect, inside high temperature resistant scour resistant, life is high.

Drawings

FIG. 1 is a left side view structural schematic diagram of a metal corrugated expansion joint for a high temperature resistant electric furnace flue gas pipeline;

FIG. 2 is a schematic view of a partially cut-away front view of a corrugated metal expansion joint for a flue gas pipe of a high temperature resistant electric furnace according to the present utility model

In the drawings, the list of components represented by the various numbers is as follows:

1. a central tube A; 2. a central tube B; 3. a bellows; 4. a guide cylinder; 5. a movable baffle; 6. a vertical plate; 7. expanding heat insulation cotton; 8. diversion heat insulation cotton; 9. high-strength coating resistance; 10. a mounting plate; 11. a threaded rod; 12. and (3) a nut.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Embodiments of the utility model are illustrated in the accompanying drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

It will be appreciated that spatially relative terms such as "under …," "under …," "below," "under …," "over …," "above," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "under …" and "under …" may include both an upper and a lower orientation. Furthermore, the device may also include an additional orientation (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

As shown in fig. 1 and fig. 2, a metal corrugated expansion joint for a high temperature resistant electric furnace flue gas pipeline comprises a central pipe A1 and a central pipe B2, wherein a corrugated pipe 3 is arranged between opposite sides of the central pipe A1 and the central pipe B2, a guide cylinder 4 is arranged on the inner side wall of the corrugated pipe 3, a movable baffle 5 is arranged on one side, close to the corrugated pipe 3, of the central pipe B2, a vertical plate 6 is arranged on the inner side of the central pipe B2 and positioned on the right side of the movable baffle 5, and expansion heat insulation cotton 7 is arranged between one side, opposite to the movable baffle 5, of the vertical plate 6.

In order to improve the heat insulation effect, the inner side of the corrugated pipe 3 is filled with diversion heat insulation cotton 8.

In order to provide a heat-insulating, scouring-resistant and fire-resistant function for the inside, the inner side walls of the central tube A1, the central tube B2 and the corrugated tube 3 are coated with a high-strength and fire-resistant coating 9.

The high-strength anti-impact refractory coating 9 is made of a high-strength anti-impact refractory mixed material.

In order to reduce the production cost, the guide cylinder 4 is a common carbon steel component, the carbon steel is an iron-carbon alloy with the carbon content of 0.0218% -2.11%, also called carbon steel, and generally contains a small amount of silicon, manganese, sulfur and phosphorus, and the higher the carbon content in the carbon steel is, the higher the hardness is, the higher the strength is, but the lower the plasticity is.

In order to facilitate the connection operation, the outsides of the central tube A1 and the central tube B2 are respectively provided with a plurality of mounting plates 10, one sides of the mounting plates 10 are rotatably connected and provided with threaded rods 11, and the outsides of the threaded rods 11 are in threaded connection and provided with two nuts 12.

According to the utility model, the guide cylinder 4 is arranged in a labyrinth guide sleeve structure, the movable end of the guide cylinder 4 is welded with the movable baffle plate 5, the expansion joint is staggered with the corrugated pipe 3, the expansion joint is filled with expansion heat insulation cotton 7, the double-layer heat insulation effect is achieved by matching with the guide heat insulation cotton 8, the inner wall of the guide cylinder 4 is sprayed with a high-strength coating 9, so that the guide cylinder is heat-insulating and scouring-resistant, and the expansion joint is arranged between one side of the movable baffle plate 5 opposite to the vertical plate 6.

In the use, the heat that it received, a part utilizes the heat dissipation of water conservancy diversion thermal insulation cotton 8 in the bellows 3 via guide cylinder 4, and another part is dispelled the heat by the expansion thermal insulation cotton 7 between movable baffle 5 and the riser 6, and double-deck heat dissipation improves radiating efficiency, avoids whole overheat damage.

The expansion heat insulation cotton 7 and the diversion heat insulation cotton 8 are all heat insulation cotton, and cotton products which can play a role in heat insulation in a broad sense are collectively called heat insulation cotton, and the heat insulation cotton has the characteristics of high temperature resistance, difficult combustion, low heat conductivity coefficient and the like;

the guide cylinder 4 is arranged in a labyrinth guide sleeve structure, which belongs to the known technology and is not described too much.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (6)

1. The utility model provides a high temperature resistant electric stove is metal bellows expansion joint for flue gas pipeline, includes center tube A (1), center tube B (2), its characterized in that, be equipped with bellows (3) between one side that center tube A (1), center tube B (2) are relative, be equipped with guide cylinder (4) on the inside wall of bellows (3), one side that center tube B (2) is close to bellows (3) is equipped with movable baffle (5), the inboard of center tube B (2) just is located the right side of movable baffle (5) and is equipped with riser (6), be equipped with expansion heat-proof cotton (7) between one side that riser (6) are relative with movable baffle (5).

2. The metal corrugated expansion joint for the high-temperature resistant electric furnace flue gas pipeline according to claim 1, wherein the inner side of the corrugated pipe (3) is filled with diversion heat insulation cotton (8).

3. The metal corrugated expansion joint for the high-temperature-resistant electric furnace flue gas pipeline according to claim 1 is characterized in that high-strength and high-resistance coatings (9) are coated on the inner side walls of the central tube A (1), the central tube B (2) and the corrugated tube (3).

4. A corrugated metal expansion joint for a flue gas pipeline of a high-temperature-resistant electric furnace according to claim 3, wherein the high-strength and impact-resistant coating (9) is made of a high-strength and impact-resistant refractory mixed material.

5. A corrugated metal expansion joint for a flue gas pipeline of a high temperature resistant electric furnace according to claim 1, wherein the guide cylinder (4) is a common carbon steel member.

6. The metal corrugated expansion joint for the high-temperature-resistant electric furnace flue gas pipeline according to claim 1, wherein a plurality of mounting plates (10) are arranged on the outer sides of the central tube A (1) and the central tube B (2), a threaded rod (11) is rotatably connected to one side of the mounting plates (10), and two nuts (12) are arranged on the outer sides of the threaded rod (11) in a threaded connection mode.