CN114150097B

CN114150097B - Hot-blast pipeline valve quick replacement structure

Info

Publication number: CN114150097B
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: 2023-01-06
Anticipated expiration: 2041-11-11
Also published as: CN114150097A

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, a protection unit is arranged at the joint of the two sides of the valve and the conveying pipeline, the protection unit comprises a protection partition plate and a buffer interval positioned between the protection partition plate and the valve, the protection unit is arranged at the two sides of the valve, the situation 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 protection partition plate is limited by the protection partition plate, the protection partition plate is extruded after the stacking layer is subjected to thermal expansion, a buffer gap is arranged between the extrusion partition plate and the stacking layer, a protection material filled in the buffer gap can play a role of buffering when the stacking layer collides, and the protection partition plate is prevented from being directly extruded to influence on the service life.

Description

Hot air 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 increase 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, the hot air valve works under the conditions of 900 to 1350 ℃ and about 0.4MPa pressure throughout the year, and the hot air valve is the equipment with the worst 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.

Furthermore, an anchoring nail used for reinforcing the connection of the protective partition plate 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 lift 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 assembled plate 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 barrier; 8-buffer interval; 9-a substrate; 10-a connecting part; 11-a guard; 12-anchor nails; 13-special-shaped bricks; 14-boss; 15-energy absorbing gaps; 16-a flange; 17-a 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 hot-blast main valve 6 quick replacement structure, including hot-blast furnace 1, the output of hot-blast furnace 1 is provided with pipeline 2, pipeline 2 includes casing 3, be provided with in the casing 3 and pile up layer 4, it is provided with heat-resisting coating 5 to pile up between layer 4 and the casing 3, heat-resisting coating 5 can reduce and pile up layer 4 and transmit heat to casing 3, the reinforcing is to the protection of casing 3, pipeline 2 is last to be provided with valve 6, the both sides of valve 6 and the protection unit that pipeline 2 junction was provided with, the protection unit includes protection baffle 7 and is located the buffer space 8 between protection baffle 7 and the valve 6, it is spacing to piling up layer 4 through protection baffle 7, avoid piling up layer 4 direct extrusion valve 6 after the thermal expansion and lead to valve 6 to warp, it can cushion the buffering to take place to expand to set up buffer space 8 between protection baffle 7 and the valve 6, the reinforcing is to valve 6, it leads to unable the opening to be caused by the extrusion deformation to avoid valve 6.

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, connecting portion 10 and the inside wall welding of 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 is fixed through anchor nail 12 and heap layer 4, fix base plate 9 and heap 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 outside of boss 14 along, 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 further comprises energy-absorbing gaps 15 located in the stacking layers 4, the number of the energy-absorbing gaps 15 is multiple, the distance between every two adjacent energy-absorbing gaps 15 is the same and ranges from 100 mm to 200mm, the number of the stacking layers 4 is multiple, the energy-absorbing gaps 15 are arranged in every stacking layer 4, the width of each energy-absorbing gap 15 ranges from 5 mm to 8mm, the energy-absorbing gaps 15 in every two adjacent stacking layers 4 are distributed in a staggered mode, refractory bricks located on the stacking layers 4 below cover the energy-absorbing gaps 15 of the upper stacking layers 4, expansion deformation spaces are provided for the stacking layers 4 after the energy-absorbing gaps 15 distributed in a staggered mode are heated, and the situation that the protection plates are extruded excessively and then the valves 6 are extruded to cause equipment is avoided.

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 cooling tube to cool down valve 6, and the injection cooling water is cooled down valve 6 in 6 high temperature through water filling port 17 looks cooling tube, avoids 6 high temperature 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 protection unit that pipeline junction was provided with, the protection unit is including the protection baffle and be located the buffering interval between protection baffle and the valve, the protection baffle is the annular, the protection baffle comprises a plurality of fan-shaped compoboards concatenation, and the junction of every two adjacent fan-shaped compoboards is provided with the energy-absorbing clearance.

2. The quick change structure of hot blast pipe valve according to claim 1, 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.

3. The quick change structure of hot blast pipe valve according to claim 2, wherein: and one end of the stacking layer, which is close to the fan-shaped combination plates, 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 plates.

4. The quick change structure of hot blast pipe valve according to claim 3, 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.

5. A hot blast duct valve quick change structure 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.

6. The quick change structure for hot blast pipe valve according to claim 5, 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.

7. The quick change structure for hot blast pipe valve as claimed in claim 6, wherein: and protective materials are filled in the buffer space and the energy absorption gap.

8. 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.