CN103966378A - Triangular flexible large pull rod device with hot air pipelines - Google Patents
Triangular flexible large pull rod device with hot air pipelines Download PDFInfo
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- CN103966378A CN103966378A CN201410225552.2A CN201410225552A CN103966378A CN 103966378 A CN103966378 A CN 103966378A CN 201410225552 A CN201410225552 A CN 201410225552A CN 103966378 A CN103966378 A CN 103966378A
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Abstract
The invention discloses a triangular flexible large pull rod device hot air pipelines, which belongs to the technical field of blast furnace top combustion type hot air furnaces. The device comprises a hot air main pipe, a hot air branch pipe, a hot air branch pipe compensator, a hot air valve and a hot air furnace shell, wherein a hot air furnace shell reinforcing ring is arranged on the hot air furnace shell, an upper hot air pipeline large pull rod support base is arranged in a cross position where the hot air branch pipe is connected with the hot air main pipe; two groups of triangularly arranged flexible large pull rods are adopted to integrally connect the hot air furnace shell reinforcing ring with a flexible large pull rod support base in a connection manner of welding or bolt connection. To connect conveniently, a connecting plate can be arranged. The device has the advantages that the raising of the hot air furnace shell can be effectively absorbed, the stress of the pipe shell and the furnace shell is reduced, the security of the hot air furnace and the pipelines is improved, and the device is particularly applicable to top combustion type hot air furnaces of which the hot air outlet is relatively high and the furnace shell raising amount is relatively large.
Description
Technical field
The invention belongs to blast furnace top combustion stove technical field, particularly provide a kind of hot air duct trilateral flexible large pull rod device, overcome pipeline blind plate power, can also absorb the pull bar of hot-air stove shell thermal expansion simultaneously, be applicable to the hot blast manifold of hotblast stove in iron-smelting process, be used for connecting hotblast stove and pipeline.
Background technology
In the developing history of blast furnace technology, the successful Application of hotblast stove has special status undoubtedly.Blast furnace is used hot-air smelting for having played vital role in the limited metallurgical coke of saving reserves, reduction energy consumption, raising furnace processor, reduction steel cost aspect; Also utilization ratio, the minimizing CO of the energy have been improved simultaneously
2discharge, has important and active influence to environment protection.Therefore the temperature, the pressure that constantly improve hot blast are the main directions of blast funnace hot blast stove technical progress.Along with technical progress, hot blast temperature develops into the level of the highest 1300 ℃ by initial 149 ℃, and in hotblast stove stove, top temperature has reached 1450 ℃, the highest 0.5MPa of furnace pressure.How the hot blast of conveying enormous amount, ultra high temp and the pressure of safety, is an important step of hotblast stove technology.If do not handle the problem of hot air duct well, easily there is in process of production pipe overheat, burn the red even serious accident of blast, cause the tragedy of great loss of life and personal injury.A reason that occurs above accident is exactly that hot air duct pull bar design is unreasonable, can not effectively solve the impact that expanded by heating, blind plate power bring, thereby causes fatigue of steel structures distortion, have an accident.
Large pull bar on hot blast manifold is the important step of hot air duct design always, and the floor plan of the large pull bar common form of hot blast manifold in the past as shown in Figure 1, Figure 2.
In figure: the 1st, hot-blast main, the 2nd, hot blast manifold, the 3rd, hot blast manifold FlexbleJoint, the 4th, hot blast valve, the 5th, hot-air stove shell, the 6th, the drag link bearing on hot-blast main, the 7th, pull bar is connected with bearing, and the 8th, the large pull bar of hot blast manifold, the 9th, length adjustment nut, the 10th, pull bar is connected with hotblast stove bearing, and the 11st, hotblast stove upper connecting rod bearing.When hotblast stove is normally worked, box hat temperature is 80～150 ℃, and the expansion that now hot blast manifold produces is absorbed by FlexbleJoint 3, and the blind plate power that air blast produces is born by 6,7,8,9,10,11 combination units that form.In order to absorb hot-air stove shell in the expansion of vertical direction, 7,10 places that are connected with bearing at pull bar can be arranged to bearing pin or chain connection.Although such form has solved the problem of steel construction expansion and blind plate power, but because blind plate power is very large, cause hot-blast outlet stress concentration, likely cause the weld cracking between bearing 11 and hot-air stove shell 5, thereby one-piece construction was lost efficacy, huge blind plate power can also cause the box hat distortion of hot-air stove shell 5, hot blast manifold 2 in addition, thereby been provided with internal refractories supporting structure is destroyed, and furnace high-temperature burns red accident of even burning by furnace shell.
Along with applying of top combustion stove technology, it is higher that the position of hot blast manifold 2 becomes, after expanded by heating, ascending amount is larger, and along with blast furnace blast improves, pipeline blind plate power is also higher, the stressed and expansion issues of the solution hot blast manifold 2 that traditional hot blast manifold pull bar 8 forms can not be safe.Domestic many top combustion stoves break down in the problem of hot blast manifold 2, hot-air stove shell 5 and the junction of hot blast manifold 2, deal with very difficultly in the situation that blast furnace is produced, and some hotblast stoves can only be produced in spite of illness, abnormally dangerous.
Summary of the invention
The object of the present invention is to provide the flexible large pull rod device of a kind of hot air duct trilateral; can effectively solve top combustion stove furnace shell 5, the hot blast manifold 2 steel construction later expansion issues of being heated; guarantee steel construction simultaneously; especially can there is not excessive deformation with hot-blast main 1 junctions with junction and the hot blast manifold 2 of hot blast manifold 2 in hot-air stove shell 5 under the effect that is subject to blind plate power; with the stability of protection masonry construction, improve the security of hotblast stove when production operation.
The present invention includes: hot-blast main 1, hot blast manifold 2, hot blast manifold loop expansion pipe 3, hot blast valve 4, hot-air stove shell 5, hot air duct upper connecting rod bearing 12, flexible large pull bar 13, web plate 14, hot-air stove shell strengthening ring 15.
The present invention utilizes trilateral stability principle, hot-air stove shell strengthening ring 15 is set on hot-air stove shell 5, the position, junctions being connected with hot-blast main 1 at hot blast manifold 2 arranges large drag link bearing 12 on hot air duct, then utilize two groups of large pull bars 13 of the flexibility being triangularly arranged that hot-air stove shell strengthening ring 15 and flexible large drag link bearing 12 are linked into an integrated entity, mode of connection adopts welding or bolt to connect.For convenience of connecting, web plate 14 can be set.
The pipeline junctions that hot blast manifold 2 is connected with hot-blast main 1 is the starting point of the flexible large pull rod device of triangle, from this starting point, flexible large pull bar 13 is arranged along tangent line or the intersection direction of hot-air stove shell 5, flexible large pull bar 13 is 45 °～120 ° with the radius angle of hot-air stove shell 5, and flexible large pull bar 13 is two other terminals of the flexible large pull rod device of triangle with the tie point of hot-air stove shell strengthening ring 15.
The cross-sectional shape of flexible large pull bar 13 can be the shaped steel of H shaped steel, angle steel, round steel, T-steel or square-section; The arrangement form of flexible large pull bar 13 has directivity, is stressed strong side in the horizontal direction, and vertical direction is stressed weak side.
The cross-sectional shape of hot-air stove shell strengthening ring 15 can be the shaped steel of H shaped steel, angle steel, T-steel or square-section, hot-air stove shell strengthening ring 15 can be arranged to the circular arc of 360 ° of full circle or 1 °-359 °, and flexible large pull bar 13 is connected with hot-air stove shell strengthening ring 15.
The hot-air stove shell strengthening ring 15 arranging on hot-air stove shell 5 can effectively improve the rigidity of hot-air stove shell 5, is conducive to the stable of hot blast manifold 2 and hot-air stove shell 5 connecting portions.
Two groups of flexible large pull bars 13 are triangularly arranged, and the point of application of pulling force are dispersed on hot-air stove shell strengthening ring 15, and the perforate position being connected with hot blast manifold 2 away from hot-air stove shell 5, thereby have reduced the problem of stress concentration of position, aperture steel construction.Flexible large pull bar 13 need to have enough resistance to tensions, can bear the tensile stress that blind plate power produces; Flexible large pull bar 13 also will have certain flexibility simultaneously, can bear the shear-stress that hot-air stove shell 5 vertical directions are heated and go up and produce, and too large deflection deformation can not occur under installment state.
Flexible large pull bar 13 will be considered directivity when arranging, should be in the horizontal direction the stressed strong side of flexible large pull bar 13, at the vertical expansion direction of hot-air stove shell 5, should be stressed weak side, as the example explanation of Fig. 6.
In sum, the invention provides a kind of top combustion stove furnace shell 5 that solves and be heated and go up and the method for hot blast manifold 2 blind plate power, utilize strengthening ring 15 and the large pull bar 13 of flexibility that is triangularly arranged is achieved as follows function:
1, strengthening ring effectively raises the rigidity of hot-air stove shell 5, improves hot-air stove shell 5 force structures at pipeline tapping position.
2, the large pull bar 13 being triangularly arranged, has been distributed to the stress action spot of hot-air stove shell 5 on strengthening ring 15, and away from pipeline tapping position, has reduced hot-air stove shell 5 internal stresss.
3, the large pull bar 13 of trilateral and strengthening ring 15 are tangent or crossing relations, and when tangent, trilateral pull bar 13 is 90 ° with hot-air stove shell 5 radius angles; While intersecting, trilateral pull bar and hotblast stove radius angle are 45 °～120 °.
4, large pull bar 13 need to have certain flexibility, considers to bear the tensile stress of blind plate power generation and the shear-stress that hot-air stove shell 5 goes up and causes simultaneously.
By the present invention, can effectively solve the disadvantageous effect that top combustion stove furnace shell 5, hot blast manifold 2 expanded by heating and blind plate power are brought.
Accompanying drawing explanation
Fig. 1 is a kind of plot plan of the large pull bar of traditional hot blast manifold.
Fig. 2 is the another kind of plot plan of the large pull bar of traditional hot blast manifold.
In figure, the draw-bar seat 6 on hot-blast main 1, hot blast manifold 2, hot blast manifold FlexbleJoint 3, hot blast valve 4, hot-air stove shell 5, pipeline, pull bar are connected 7 with bearing, the large pull bar 8 of hot blast manifold, length adjustment nut 9, pull bar are connected 10 with hotblast stove bearing, hotblast stove upper connecting rod bearing 11.
Fig. 3 is the plot plan of trilateral flexible draw bar embodiment 1 of the present invention.
Fig. 4 is the plot plan that trilateral flexible draw bar of the present invention is executed example 2.
Fig. 5 is the plot plan that trilateral flexible draw bar of the present invention is executed example 3.
In figure, hot-blast main 1, hot blast manifold 2, hot blast manifold FlexbleJoint 3, hot blast valve 4, hot-air stove shell 5, hot air duct upper connecting rod bearing 12, flexible large pull bar 13, web plate 14, hot-air stove shell strengthening ring 15.
Fig. 6 is the example explanation of the large pull bar stressed strong side of 13 cross section and stressed weak side, and cross section slice location is shown in A-A slice location in Fig. 3.
Embodiment
Embodiment 1:
Fig. 3 is the specific embodiment of the present invention.
As shown in Figure 3, the present invention includes: hot-blast main 1, hot blast manifold 2, hot blast manifold loop expansion pipe 3, hot blast valve 4, hot-air stove shell 5, hot air duct upper connecting rod bearing 12, flexible large pull bar 13,, web plate 14, hot-air stove shell strengthening ring 15.
The junctions being connected with hot blast manifold 2 hot-blast main 1 arranges large drag link bearing 12.Strengthening ring 15 is set on hot-air stove shell 5, is connected to for convenience web plate 14 is set on strengthening ring 15.With the large pull bar 13 of flexibility, drag link bearing 12 and web plate 14 are coupled together, strengthening ring 15 is 360 ° of complete annulus.Thereby can form a whole pull bar combination unit, guarantee safety and stability when hot blast manifold is produced.
Embodiment 2:
Fig. 4 is another kind of embodiment of the present invention.
As shown in Figure 4, present embodiment comprises: hot-blast main 1, hot blast manifold 2, hot blast manifold loop expansion pipe 3, hot blast valve 4, hot-air stove shell 5, hot air duct upper connecting rod bearing 12, flexible large pull bar 13, web plate, 14, hot-air stove shell strengthening ring 15.
In this embodiment, method and Fig. 3 are similar, difference with border deployment scenarios very factually, two groups of corresponding drag link bearings 12 of large pull bar are merged into a set of.
The junctions being connected with hot blast manifold 2 hot-blast main 1 arranges large drag link bearing 12.Strengthening ring 15 is set on hot-air stove shell, is connected to for convenience web plate 14 is set on strengthening ring 15.With the large pull bar 13 of flexibility, drag link bearing 12 and web plate 14 are coupled together.Thereby can form a whole pull bar combination unit, guarantee safety and stability when hot blast manifold is produced.
Embodiment 3:
Fig. 5 is another kind of embodiment of the present invention.
As shown in Figure 5, present embodiment comprises: hot-blast main 1, hot blast manifold 2, and hot blast manifold loop expansion pipe 3, hot blast valve 4, hot-air stove shell 5, hot air duct upper connecting rod bearing 12, flexible large pull bar 13,, web plate, 14, hot-air stove shell strengthening ring 15.
Newly-built or improvement projects for some, hotblast stove height is restricted, and strengthening ring 15 cannot be made 360 ° of complete rings, can disconnect at hot-blast outlet place.
The present embodiment is similar to Example 1, and difference is that hot-air stove shell strengthening ring 15 is not 360 ° of domains, but disconnects at hot-blast outlet place.
The junctions being connected with hot blast manifold 2 hot-blast main 1 arranges large drag link bearing 12.Strengthening ring 15 is set on hot-air stove shell, is connected to for convenience web plate 14 is set on strengthening ring 15.With the large pull bar 13 of flexibility, drag link bearing 12 and web plate 14 are coupled together.Thereby can form a whole pull bar combination unit, guarantee safety and stability when hot blast manifold is produced.
The invention belongs to blast furnace top combustion stove field, a kind of method that solves top combustion stove steel construction expanded by heating and hot blast manifold 2 blind plate power is provided, be suitable for solving top combustion stove furnace shell 5, the hot blast manifold 2 steel construction later expansion issues of being heated, improve the security of hotblast stove when production operation.
The hot air duct flexible draw bar of triangular arrangement of the present invention, has multiple embodiments, the accompanying drawing explanation use that only lays down a definition, not limitation of the present invention.Anyly do not depart from mentality of designing of the present invention, the present invention is done to unsubstantiality changes, all still belong to scope of the present invention.
Claims (4)
1. the flexible large pull rod device of hot air duct trilateral, comprising: hot-blast main, hot blast manifold, hot blast manifold loop expansion pipe, hot blast valve, hot-air stove shell; It is characterized in that: hot-air stove shell strengthening ring (15) is set on hot-air stove shell (5), the position, junctions being connected with hot-blast main (1) at hot blast manifold (2) arranges large drag link bearing (12) on hot air duct, then utilize two groups of large pull bars of the flexibility being triangularly arranged (13) that hot-air stove shell strengthening ring (15) and flexible large drag link bearing (12) are linked into an integrated entity, mode of connection adopts welding or bolt to connect;
The pipeline junctions that hot blast manifold (2) is connected with hot-blast main (1) is the starting point of the flexible large pull rod device of triangle, from this starting point, flexible large pull bar (13) is arranged along tangent line or the intersection direction of hot-air stove shell (5), flexible large pull bar (13) is 45 °～120 ° with the radius angle of hot-air stove shell (5), and flexible large pull bar (13) is two other terminal of the flexible large pull rod device of triangle with the tie point of hot-air stove shell strengthening ring (15).
2. device according to claim 1, is characterized in that, the cross-sectional shape of flexible large pull bar (13) is the shaped steel of H shaped steel, angle steel, round steel, T-steel or square-section; The arrangement form of flexible large pull bar (13) has directivity, is stressed strong side in the horizontal direction, and vertical direction is stressed weak side.
3. device according to claim 1, is characterized in that, totally two groups of the flexible large pull rod device of triangle lay respectively at the upper and lower part of hot blast manifold (2).
4. install according to claim 1, it is characterized in that, the cross-sectional shape of hot-air stove shell strengthening ring (15) is to be the shaped steel of H shaped steel, angle steel, T-steel or square-section, and hot-air stove shell strengthening ring (15) is arranged to the circular arc of 360 ° of full circle or 1 °-359 °.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410225552.2A CN103966378B (en) | 2014-05-24 | 2014-05-24 | The flexible large pull rod device of hot air duct trilateral |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410225552.2A CN103966378B (en) | 2014-05-24 | 2014-05-24 | The flexible large pull rod device of hot air duct trilateral |
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| CN103966378A true CN103966378A (en) | 2014-08-06 |
| CN103966378B CN103966378B (en) | 2015-12-30 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263867A (en) * | 2014-10-25 | 2015-01-07 | 马钢(集团)控股有限公司 | Hot blast stove structure of blast furnace |
| CN104392120A (en) * | 2014-11-07 | 2015-03-04 | 中冶京诚工程技术有限公司 | Design method of horizontal pull rod of blast furnace hot air surrounding pipe |
| CN106086274A (en) * | 2016-08-24 | 2016-11-09 | 安徽马钢重型机械制造有限公司 | A kind of hot air furnace hot air pipeline stabilization system |
| CN106086273A (en) * | 2016-08-24 | 2016-11-09 | 安徽马钢重型机械制造有限公司 | Blast furnace single-column type air stove detection hot-blast outlet answers power apparatus and application system thereof and method |
| CN106086270A (en) * | 2016-08-05 | 2016-11-09 | 中南大学 | A kind of top combustion stove |
| CN106119453A (en) * | 2016-08-24 | 2016-11-16 | 安徽马钢重型机械制造有限公司 | A kind of single-column type blast funnace hot blast stove hot-blast outlet answers apparatus for adjusting force and control method thereof |
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| CN203904381U (en) * | 2014-05-24 | 2014-10-29 | 北京首钢国际工程技术有限公司 | Triangular flexible large pull rod device of hot air pipeline |
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| JP2006291293A (en) * | 2005-04-11 | 2006-10-26 | Nippon Steel Corp | Air-blasting system of hot blast stove |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263867A (en) * | 2014-10-25 | 2015-01-07 | 马钢(集团)控股有限公司 | Hot blast stove structure of blast furnace |
| CN104263867B (en) * | 2014-10-25 | 2016-02-10 | 马钢(集团)控股有限公司 | A kind of blast-furnace hot-air furnace structure |
| CN104392120A (en) * | 2014-11-07 | 2015-03-04 | 中冶京诚工程技术有限公司 | Design method of horizontal pull rod of blast furnace hot air surrounding pipe |
| CN104392120B (en) * | 2014-11-07 | 2017-07-21 | 中冶京诚工程技术有限公司 | Design method of horizontal pull rod of blast furnace hot air surrounding pipe |
| CN106086270A (en) * | 2016-08-05 | 2016-11-09 | 中南大学 | A kind of top combustion stove |
| CN106086270B (en) * | 2016-08-05 | 2018-02-27 | 中南大学 | A kind of top combustion stove |
| CN106086274A (en) * | 2016-08-24 | 2016-11-09 | 安徽马钢重型机械制造有限公司 | A kind of hot air furnace hot air pipeline stabilization system |
| CN106086273A (en) * | 2016-08-24 | 2016-11-09 | 安徽马钢重型机械制造有限公司 | Blast furnace single-column type air stove detection hot-blast outlet answers power apparatus and application system thereof and method |
| CN106119453A (en) * | 2016-08-24 | 2016-11-16 | 安徽马钢重型机械制造有限公司 | A kind of single-column type blast funnace hot blast stove hot-blast outlet answers apparatus for adjusting force and control method thereof |
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| CN103966378B (en) | 2015-12-30 |
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