CN114150097A

CN114150097A - Hot-blast pipeline valve quick replacement structure

Info

Publication number: CN114150097A
Application number: CN202111334325.XA
Authority: CN
Inventors: 李富朝; 张肖丽; 王潘峰; 李贯鹏
Original assignee: Zhengzhou Annec Industrial Co ltd
Current assignee: Zhengzhou Annec Industrial Co ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-03-08
Anticipated expiration: 2041-11-11
Also published as: CN114150097B

Abstract

The invention relates to the technical field of hot air conveying equipment, in particular to a quick replacement structure for a hot air pipeline valve, which comprises a hot air furnace, wherein a conveying pipeline is arranged at the output end of the hot air furnace, the conveying pipeline comprises a shell, a stacking layer is arranged in the shell, a heat-resistant coating is arranged between the stacking layer and the shell, a valve is arranged on the conveying pipeline, protective units are arranged at the joints of the two sides of the valve and the conveying pipeline, each protective unit comprises a protective partition plate and a buffer interval positioned between the protective partition plate and the valve, the protective units are arranged at the two sides of the valve, the condition that the valve is directly extruded by the heating expansion of the conveying pipeline in the use process and cannot be disassembled is avoided, the protective partition plates are limited by the protective partition plates, the protective partition plates are extruded after the stacking layer is subjected to thermal expansion, buffer gaps are arranged between the extrusion partition plates and the stacking layer, and protective materials filled in the buffer gaps can play a role of buffering when the stacking layer collides, the influence on the service life caused by the direct extrusion of the protective clapboard is avoided.

Description

Hot-blast pipeline valve quick replacement structure

Technical Field

The invention relates to the technical field of hot air conveying equipment, in particular to a quick replacement structure for a hot air pipeline valve.

Background

With the continuous improvement of the temperature and the pressure of hot air of a blast furnace, the working condition of a hot air valve is more and more severe, and the hot air valve works under the conditions of 900-1350 ℃ and about 0.4MPa pressure throughout the year, and is the worst equipment in the working condition in a valve system. Therefore, the opening and closing capacity and the service life of the hot blast valve are always technical problems in the iron-making field under the long-term working state of the hot blast valve. The main reason is that under the command of frequent alternate blowing and blowing-down, the masonry material in the hot air branch pipe is in a cold and hot alternate state, and the corresponding contraction and expansion of the pipeline masonry material are frequently alternated. Meanwhile, the hot blast valve is also in frequent opening, closed operating condition, under the effect of brickwork expansive force, the hot blast valve needs to be opened and moved, the pipeline brickwork is heated and expanded, the thermal stress that the expansion produced passes through the valve plate both sides resistant material and acts on the valve plate of hot blast valve, the resistant material of valve plate both sides is because of receiving the extrusion deformation, the phenomenon that drops easily takes place, it is insensitive to cause the valve plate of hot blast valve to open the work, lead to the valve plate to damage unable the use when the extrusion is serious, bring very big inconvenience for maintenance and dismantlement, this will seriously influence the air supply efficiency of hot-blast furnace. The opening of the hot blast valve is insensitive, which is a great potential safety hazard of the whole hot blast branch pipe system.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a quick replacement structure for a hot-blast pipeline valve, which can be replaced in time when a hot-blast valve fails, and meanwhile, the novel masonry structure plays a key role in protecting a valve plate, so that the service life of the hot-blast valve is greatly prolonged.

The invention is realized by the following technical scheme: the utility model provides a hot-blast main valve quick replacement structure, includes the hot-blast furnace, the output of hot-blast furnace is provided with pipeline, the last valve that is provided with of pipeline, pipeline includes the casing and is located the inboard layer of piling up of casing, the protection unit that the both sides of valve were provided with, protection unit is including protection baffle, the heat-resisting coating that is located the protection baffle surface and the buffer space that is located protection baffle both sides.

Further, the protection baffle is the annular, the protection baffle has a plurality of fan-shaped compoboards concatenation to form, fan-shaped compoboard is including being close to the connecting portion of casing one side and extending to the guard portion in the pipeline.

Further, an anchoring nail used for reinforcing the connection of the protective partition is arranged on the outer side wall of the shell.

Further, the outside of the anchoring nail is provided with a spray coating.

Further, connecting portion and guard portion integrated into one piece, the border department of guard portion both sides is provided with the concatenation and prolongs the board, one side that the casing was kept away from to the guard portion is provided with the limiting plate.

Further, the width of the limiting plate is twice the width of the splicing extending plate.

Furthermore, the protection unit further comprises a plurality of energy-absorbing gaps in the stacking layer, and the distance between every two adjacent energy-absorbing gaps is the same.

Furthermore, protective materials are filled in the buffer space and the energy absorption gap.

The invention has the beneficial effects that: 1. set up the protection unit through the both sides at the valve, avoid pipeline in the use thermal expansion direct extrusion valve, lead to the unable dismantlement of valve, carry on spacingly through the protection baffle, extrude the protection baffle after receiving the thermal expansion when piling up the layer, be provided with the buffering clearance between extrusion baffle and the piling layer, the protection material of buffering clearance intussuseption can play the cushioning effect when piling up the layer and bumping, avoids the protection baffle to be directly extruded and influence life.

2. Reserve the energy-absorbing clearance when piling up through piling up the layer, receive the thermal energy after the layer of piling up and cushion through the energy-absorbing clearance in order to weaken and pile up the layer and to the extrusion of protection baffle, the life of extension protection baffle, and then the life of promotion valve.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a protection unit according to the present invention;

FIG. 3 is a schematic structural view of a stacking layer;

FIG. 4 is a schematic structural view of a protective barrier according to the present invention;

FIG. 5 is a front view of the protective barrier of the present invention;

FIG. 6 is a schematic structural view of a fan-shaped composite board according to the present invention.

Wherein: 1-hot blast stove; 2-a conveying pipeline; 3-a shell; 4-stacking layers; 5-heat resistant coating; 6-a valve; 7-a protective partition plate; 8-buffer interval; 9-a substrate; 10-a connecting part; 11-a guard; 12-anchor nails; 13-special-shaped bricks; 14-a boss; 15-energy absorbing gaps; 16-a flange; 17-water injection port.

Detailed Description

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 and may, for example, be fixedly connected, detachably connected, or integrally connected; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1-6, a fast replacement structure for a hot air duct valve 6 comprises a hot air furnace 1, a conveying duct 2 is arranged at an output end of the hot air furnace 1, the conveying duct 2 comprises a casing 3, a stacking layer 4 is arranged in the casing 3, a heat-resistant coating 5 is arranged between the stacking layer 4 and the casing 3, the heat-resistant coating 5 can reduce the heat transferred from the stacking layer 4 to the casing 3, the protection of the casing 3 is enhanced, a valve 6 is arranged on the conveying duct 2, a protection unit is arranged at the joint of two sides of the valve 6 and the conveying duct 2, the protection unit comprises a protection baffle 7 and a buffer space 8 between the protection baffle 7 and the valve 6, the stacking layer 4 is limited by the protection baffle 7, the valve 6 is prevented from deforming due to direct extrusion of the valve 6 after the stacking layer 4 is heated and expands, the buffer space 8 is arranged between the protection baffle 7 and the valve 6 and can buffer after the expansion, the protection to the valve 6 is enhanced, and the valve 6 is prevented from being extruded and deformed to be incapable of being opened.

The protective partition plate 7 is annular, the protective partition plate 7 is formed by splicing a plurality of fan-shaped combination boards, the energy absorption gap 15 is arranged at the joint of every two adjacent fan-shaped combination boards, the energy absorption gap 15 can provide a deformation space when the fan-shaped combination boards are heated to expand in the using process, and the protective partition plate 7 is prevented from being damaged by extruding a pipeline after being heated to expand.

Fan-shaped compoboard includes base plate 9, base plate 9 is provided with connecting portion 10 towards the one end of casing 3, the inside wall welding of connecting portion 10 and casing 3, the other end is provided with protection part 11, fill through heat-resistant coating 5 between the lower terminal surface of protection part 11 and the upper surface of boss 14, reduce heat transfer, base plate 9 passes through anchor nail 12 and piles up layer 4 fixed, fix base plate 9 and pile layer 4 through anchor nail 12, base plate 9 is provided with heat-resistant coating 5 towards a side surface of valve 6, heat-resistant coating 5 flushes with the outer fringe of boss 14, reserve clearance formation buffering interval 8 between heat-resistant coating 5 and the valve 6.

One end of the stacking layer 4 close to the fan-shaped combination plates is provided with a special-shaped brick 13, the outer side wall of the lower half part of the special-shaped brick 13 extends outwards to form a boss 14 for receiving the fan-shaped combination plates, and the width of the boss 14 = the thickness of the base plate 9 + the thickness of the heat-resistant coating 5.

The protection unit is still including being located the energy-absorbing clearance 15 of piling layer 4, the quantity in energy-absorbing clearance 15 is a plurality of, and the distance is the same between every two adjacent energy-absorbing clearances 15 and is 100 supplyes 200mm, the quantity of piling layer 4 is a plurality of, all be provided with energy-absorbing clearance 15 in every piling layer 4, the width in energy-absorbing clearance 15 is 5-8mm, two adjacent energy-absorbing clearances 15 staggered distribution in piling layer 4, the resistant firebrick that is located below piling layer 4 covers the energy-absorbing clearance 15 of upper strata piling layer 4, the energy-absorbing clearance 15 through staggered distribution provides the inflation deformation space after being heated for piling layer 4, avoid the guard plate to be extrudeed behind the excessive extrusion valve 6 and cause equipment.

The buffer space 8 and the energy absorption gap 15 are filled with protective materials, and the protective materials are ceramic fiber blankets.

Valve 6 is connected with pipeline 2 through flange 16, connects convenient dismantlement and change through flange 16, is provided with the cooling tube in the valve 6, and the water filling port 17 of cooling tube is located one side that flange 16 deviates from valve 6, leads to the cooling tube to cool down valve 6, and the high temperature of valve 6 is cooled down valve 6 through the injection cooling water in 17 looks cooling tubes of water filling port, avoids 6 high temperatures of valve to take place deformation and leads to the damage.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a hot-blast pipeline valve quick replacement structure, includes the hot-blast furnace, its characterized in that: the output of hot-blast furnace is provided with pipeline, pipeline includes the casing, be provided with in the casing and pile the layer, it is provided with heat-resisting coating to pile between layer and the casing, the last valve that is provided with of pipeline, the both sides of valve and the protective unit that pipeline junction was provided with, protective unit is including the protection baffle and be located the buffering interval between protection baffle and the valve.

2. The quick change structure of hot blast pipe valve according to claim 1, wherein: the protective partition plate is annular and is formed by splicing a plurality of fan-shaped combination plates, and an energy absorption gap is arranged at the joint of every two adjacent fan-shaped combination plates.

3. The quick change structure of hot blast pipe valve according to claim 2, wherein: the fan-shaped combination board comprises a substrate, wherein one end of the substrate, facing the shell, is provided with a connecting part, the other end of the substrate is provided with a protective part, the substrate is fixed with the stacking layer through an anchoring nail, and one side surface of the substrate, facing the valve, is provided with a heat-resistant coating.

4. The quick change structure of hot blast pipe valve according to claim 3, wherein: and one end of the stacking layer, which is close to the fan-shaped combination board, is provided with a special-shaped brick, and the outer side wall of the lower half part of the special-shaped brick is provided with a boss for bearing the fan-shaped combination board.

5. The quick change structure for hot blast pipe valve according to claim 4, wherein: the connecting part is welded with the inner side wall of the shell, heat-resistant paint is filled between the lower end face of the protection part and the upper surface of the boss, and a buffer interval is arranged between the boss and the valve.

6. The quick change structure of hot blast pipe valve according to claim 1, wherein: the protection unit further comprises a plurality of energy-absorbing gaps in the stacking layer, and the distance between every two adjacent energy-absorbing gaps is the same.

7. The quick change structure for hot blast pipe valve according to claim 6, wherein: the quantity of piling layers is a plurality of, all is provided with the energy-absorbing clearance in every piling layer, and the energy-absorbing clearance in two adjacent piling layers is crisscross to be distributed.

8. The quick change structure for hot blast pipe valve according to claim 7, wherein: and protective materials are filled in the buffer space and the energy absorption gap.

9. The quick change structure of hot blast pipe valve according to claim 1, wherein: the valve is connected with the conveying pipeline through a flange, a cooling pipe is arranged in the valve, and a water injection port of the cooling pipe is located on one side, away from the valve, of the flange.