CN100560738C - Method for replacing furnace burden flow valve plate - Google Patents
Method for replacing furnace burden flow valve plate Download PDFInfo
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- CN100560738C CN100560738C CNB2008100694638A CN200810069463A CN100560738C CN 100560738 C CN100560738 C CN 100560738C CN B2008100694638 A CNB2008100694638 A CN B2008100694638A CN 200810069463 A CN200810069463 A CN 200810069463A CN 100560738 C CN100560738 C CN 100560738C
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- valve
- valve plate
- close
- clack box
- remove
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Abstract
The invention discloses a kind of method for replacing furnace burden flow valve plate, the steps include: that 1. furnace charge empties after, associated components is opened, removed to blast furnace staying, carries out that coal gas is isolated and get rid of and handle; 2. remove the maintenance sect on close clack box both sides down, lifting appliance is set at place, maintenance sect and down close clack box the inside; 3. remove old valve plate, new valve plate is installed; 4. detect, debug, carry out recovery work after qualified, just can return to normal production this moment.The present invention is safe, the engineering time short (as long as 150 minutes), can farthest reduce to change the influence to producing.The proposition of this programme provides beneficial reference to the colleague, is fit to the unplanned replacing of furnace burden flow valve plate.
Description
Technical field
The present invention relates to a kind of method for replacing furnace burden flow valve plate.
Background technology
The blast furnace feeding section is followed successively by batch can 1, batch can 2 and airtight box 3 from top to bottom, sees Fig. 1, is provided with material stop valve 4 and last close valve 5 between last batch can 1 and the batch can 2, is provided with material valve 6 and following close valve 7 between batch can 2 and the airtight box 3.Material stop valve 4 and last close valve 5 are positioned at close clack box 8, material valve 6 and following close valve 7 are positioned at close clack box 9 down, are provided with the sect in following close clack box 9 fronts, and both sides are provided with the maintenance sect, be provided with central trunnion 10 in airtight box 3, central trunnion 10 is positioned at distributor chute 11 tops.Be provided with blocking material plate in the close clack box 9 down simultaneously, close valve 7 belows were so that furnace charge can enter central trunnion 10 under the guide functions of blocking material plate under blocking material plate was positioned at.
Material stop valve 4, last close valve 5, material valve 6 and following close valve 7 are by the hydro-cylinder control action, and hydro-cylinder is attached thereto by connecting rod.The main effect of material valve 6 is needs that the speed of control materials flow satisfies blast-furnace smelting, secondly is backgauge and blowing.The groundwork part is a valve plate 12, valve plate 12 is made up of two metal sheets that misplace up and down, and two valve plates are separately fixed on the connecting arm 13 by bolt 14, nut 15, see Fig. 2 and Fig. 3, connecting arm is connected with same hydro-cylinder by connecting rod again, controls two valve plate synchronization actions by hydro-cylinder.After opening down close valve and material valve, the central trunnion in batch can and the airtight box communicates, and furnace charge falls by central trunnion from batch can and enters distributor chute.The open angle of material valve has determined the progress of cloth, and this angle and chute cloth are closely related.
The Working environment very severe of material valve two valve plates, furnace charge forms continual impact to valve plate and washes away on the one hand, envrionment temperature also can cause big influence to valve plate on the other hand, consequently make valve plate brittle failure occur, need to change, though can prolong its work-ing life by the method that improves the valve plate material.According to common design, the replacement cycle of valve plate is consistent with the time between overhaul of blast furnace, promptly blast furnace overhaul the time, just the material valve valve plate is changed, and no matter whether valve plate expires, this is inside the plan replacing.That is to say that under the normal circumstances, within blast furnace overhaul, the material valve valve plate can not changed.The time between overhaul of blast furnace about 10 years, therefore requires the work-ing life of valve plate more than 10 years usually.But, because material valve valve plate bad working environment, before blast furnace overhaul its to break down, cause to shift to an earlier date work-ing life overdue situation also be outwardness, this just needs to change immediately, otherwise influence is produced.The replacing of this unplanned replacing during with blast furnace overhaul exists very big different, and the blast furnace overhaul time is long, and blast furnace shuts down fully, damping down, stops the supple of gas or steam, and associated components is easy to dismantle, and the dismounting of valve plate self is also easy, and the time is also well-to-do.And unplanned replacing time requirement is urgent, and blast furnace is damping down only, and coal gas still exists, and needs to consider safety factors.But, up to the present, both do not had referential actually operating, but do not had the learning theory article yet also not about the research of unplanned material valve valve plate replacing aspect.
Summary of the invention
At the prior art above shortcomings, the purpose of this invention is to provide a kind of quick, safe method for replacing furnace burden flow valve plate, present method is suitable for the unplanned replacing of furnace burden flow valve plate.
The object of the present invention is achieved like this:
Method for replacing furnace burden flow valve plate is characterized in that: it comprises the steps:
1. after treating that furnace charge in batch can and the last batch can all empties, make blast furnace staying, with material stop valve, go up close valve, material valve and down close valve all open and put in place, carry out the following preparation work of this step then: open down close clack box sect, remove close valve hydro-cylinder bearing pin down, remove close valve guard flitch down, draw back down close valve plate, blind plate and fill out the grains of sand on central trunnion upper end cover to cut off gas flue, downward close clack box the inside send pressurized air to get rid of the coal gas of blind plate top, removes material valve hydro-cylinder bearing pin and pitman pin simultaneously;
2. detect the gas concentration of down close clack box the inside, change step over to 3. after reaching safety standards, send pressurized air to get rid of coal gas otherwise continue downward close clack box the inside;
3. lifting appliance is installed: remove the maintenance sect on close clack box both sides down, the place respectively is provided with an electric block at the maintenance sect, makes the connecting arm of material valve can rest on the optional position by electric block; In down close clack box the inside bottle gouard moved by hands is set and is used for the new and old valve plate of lifting lifting;
4. remove old valve plate, new valve plate is installed: fixedly the nut of valve plate and connecting arm is cut device and is broken with the hydraulic pressure screw thread is broken, remove the bolt that connects valve plate and connecting arm, pull down old valve plate and transport down close clack box by bottle gouard moved by hands, by bottle gouard moved by hands new valve plate is transported down close clack box again, new valve plate is fixedlyed connected with connecting arm by bolt, nut;
5. detect, debug: remove the bottle gouard moved by hands of down close clack box the inside, two electric blocks with place, maintenance sect is provided with detect the material valve working order, and make it reach technical requirements by adjustment; Connect material valve pitman pin and hydro-cylinder bearing pin, open Hydraulic Station and carry out test run;
6. after 5. the step, operation made material valve working properly by the, the maintenance sect on close clack box both sides down is installed, puts down down close valve plate, connect close valve hydro-cylinder bearing pin down, remove the grains of sand and blind plate, close valve guard flitch down is installed, close close clack box sect down, valve plate was changed and was finished this moment, can return to normal production.
Above-mentioned the 5. the adjustment in step mainly be the gap of adjusting between two valve plates, its inflation method is: between new valve plate and connecting arm metallic gasket is set, change the angle of valve plate by different spacer thicknesses and position relation, thereby the gap that makes two valve plates is within technical requirements.
The proposition of the technical program provides one can supply method of operating and reference for the unplanned replacing of furnace burden flow valve plate, and it has following beneficial effect at least:
1, the engineering time short, high efficiency can finish wholely more changing jobs usually in 150 minutes, can farthest reduce to change the influence to producing.
2, the following compressed air purge of close clack box, gas concentration are in safety range, and not needing to get angry in the following close clack box just can finish wholely more changes jobs, and security is good.
3, the proposition of this programme provides beneficial reference for the solution of industry on same problem.
Description of drawings
Fig. 1-blast furnace feeding section structural representation of the present invention;
Fig. 2-two valve plate positional structure synoptic diagram;
Fig. 3-Fig. 2 vertical view (valve plate on one side).
Embodiment
Introduce the present invention in detail below in conjunction with accompanying drawing.
Before formally changing, need carry out following three parts preparation work:
One, formulates detailed arrangement and method for construction and detection method;
Two, spare part, material, instrument, personnel prepare to put in place;
Three, formulate security measures, be ready to needed material, put up the maintenance safety platform.
After above-mentioned preparation work is finished, just can formally carry out the replacing of furnace burden flow valve plate, its concrete operations step is as follows, asks simultaneously in conjunction with Fig. 1, Fig. 2 and Fig. 3:
1. after treating that furnace charge in batch can 2 and the last batch can 1 all empties, make blast furnace staying, with material stop valve 4, go up close valve 5, material valve 6 and following close valve 7 are all opened and are put in place, carry out the following preparation work of this step (as far as possible carrying out simultaneously of can carrying out simultaneously of following work then, to save the replacing time): open down close clack box 9 sects, remove close valve hydro-cylinder bearing pin down, make down close valve can be turned to the limit position that leaves its works better, remove close valve guard flitch down, draw back down close valve plate to leave the enough working spaces of replacing personnel for, blind plate and fill out the grains of sand on central trunnion 10 upper end covers to cut off the coal gas data feedback channel fully, downward close clack box 9 the insides feed pressurized air to get rid of the coal gas of blind plate top, remove material valve hydro-cylinder bearing pin and pitman pin simultaneously, make the connecting arm of fixedlying connected to rest on the optional position under external force with valve plate;
2. detect the gas concentration of down close clack box the inside, change step over to 3. after reaching safety standards, send pressurized air with further eliminating coal gas otherwise continue downward close clack box the inside, till reaching safety standards;
3. lifting appliance is installed:, therefore need to install lifting appliance because the weight of valve plate is unpractical up to hundreds of jin by manually transporting, transporting.At first remove the maintenance sect on close clack box both sides down, the place respectively is provided with an electric block on the maintaining roadway doorway, is that external force makes the connecting arm of material valve can rest on the optional position with the electric block; In the batch can the inside one horizontal stroke side is set simultaneously, bottle gouard moved by hands is installed in and is used for the new and old valve plate of lifting lifting in the horizontal stroke side;
4. remove old valve plate, new valve plate is installed: fixedly the broken device of cutting of the nut 15 usefulness hydraulic pressure screw threads of valve plate 12 and connecting arm 13 is broken (because the Working environment of nut has determined it normally not turn on, can only remove with failure mode, consider from security standpoint simultaneously, here can not use the flame cutting cutter, because can produce spark during the work of flame cutting cutter, and the interior residual coal gas that does not drain that has of following close clack box own, as producing explosion hazard) with flame flame cutting cutter, remove the bolt 14 that connects valve plate 12 and connecting arm 13, bolt 14, pull down old valve plate 12 after nut 15 is pulled down again and transport down close clack box 9 by bottle gouard moved by hands, and then new valve plate is transported down close clack box by bottle gouard moved by hands, pass through bolt, nut is fixedlyed connected new valve plate with connecting arm;
5. detect, debug: remove the bottle gouard moved by hands of down close clack box the inside,, detect the material valve working order and whether meet the demands, and make it reach technical requirements by adjustment with two electric blocks that place, maintaining roadway doorway is provided with; The technical requirements here mainly be meant between two valve plates the gap whether within the limits prescribed, requiring such as its gap of 750 blast furnaces is 8～12mm, its concrete inflation method is: between new valve plate 12 and connecting arm 13 metallic gasket 16 is set, see Fig. 2 and Fig. 3, arrow among Fig. 2 is represented valve plate direction of motion, change the angle of valve plate by the tightness of different spacer thicknesses, position relation and attaching nut, make valve plate rely on center one end and upwarp or sink, thereby the gap that makes two valve plates is within technical requirements; Connect material valve pitman pin and hydro-cylinder bearing pin, open Hydraulic Station and carry out test run;
6. after 5. the step, operation made material valve working properly by the, carry out recovery work at last, the maintenance sect of removing is reinstalled in down close clack box both sides, put down down close valve plate it is put in place, connect close valve hydro-cylinder bearing pin down, remove the grains of sand and blind plate, close valve guard flitch down is installed, close close clack box sect down, valve plate was changed and was finished this moment, can return to normal production.
Claims (2)
1, method for replacing furnace burden flow valve plate is characterized in that: it comprises the steps:
1. after treating that furnace charge in batch can (2) and the last batch can (1) all empties, make blast furnace staying, with material stop valve (4), go up close valve (5), material valve (6) and following close valve (7) are all opened and are put in place, carry out the following preparation work of this step then: open down close clack box sect, remove close valve hydro-cylinder bearing pin down, remove close valve guard flitch down, draw back down close valve plate, blind plate and fill out the grains of sand on central trunnion (10) upper end cover to cut off gas flue, downward close clack box the inside send pressurized air to get rid of the coal gas of blind plate top, removes material valve hydro-cylinder bearing pin and pitman pin simultaneously;
2. detect the gas concentration of down close clack box the inside, change step over to 3. after reaching safety standards, send pressurized air to get rid of coal gas otherwise continue downward close clack box the inside;
3. lifting appliance is installed: remove the maintenance sect on close clack box both sides down, the place respectively is provided with an electric block at the maintenance sect, makes the connecting arm of material valve can rest on the optional position by electric block; In down close clack box the inside bottle gouard moved by hands is set and is used for the new and old valve plate of lifting lifting;
4. remove old valve plate, new valve plate is installed: fixedly the nut (15) of valve plate (12) and connecting arm (13) is cut device and is broken with the hydraulic pressure screw thread is broken, remove the bolt (14) that connects valve plate (12) and connecting arm (13), pull down old valve plate and transport down close clack box by bottle gouard moved by hands, by bottle gouard moved by hands new valve plate is transported down close clack box again, new valve plate is fixedlyed connected with connecting arm by bolt, nut;
5. detect, debug: remove the bottle gouard moved by hands of down close clack box the inside, two electric blocks with place, maintenance sect is provided with detect the material valve working order, and make it reach technical requirements by adjustment; Connect material valve pitman pin and hydro-cylinder bearing pin, open Hydraulic Station and carry out test run;
6. after 5. the step, operation made material valve working properly by the, the maintenance sect on close clack box both sides down being installed, putting down down close valve plate, connect close valve hydro-cylinder bearing pin down, remove the grains of sand and blind plate, close valve guard flitch down is installed, resumes production in close clack box sect under closing.
2, method for replacing furnace burden flow valve plate according to claim 1 is characterized in that: described the when 5. step is whole, metallic gasket (16) is being set to adjust the gap of two valve plates (12) between new valve plate (12) and connecting arm (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100694638A CN100560738C (en) | 2008-03-12 | 2008-03-12 | Method for replacing furnace burden flow valve plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100694638A CN100560738C (en) | 2008-03-12 | 2008-03-12 | Method for replacing furnace burden flow valve plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101245397A CN101245397A (en) | 2008-08-20 |
| CN100560738C true CN100560738C (en) | 2009-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100694638A Expired - Fee Related CN100560738C (en) | 2008-03-12 | 2008-03-12 | Method for replacing furnace burden flow valve plate |
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| CN (1) | CN100560738C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LU91583B1 (en) * | 2009-07-03 | 2011-01-04 | Wurth Paul Sa | Sealing valve arrangement for a shaft furnace charging installation |
| CN107940479B (en) * | 2017-12-28 | 2023-10-13 | 江苏中研宜普科技有限公司 | Heat accumulating combustion device with double-valve-plate rotary valve |
| CN110926228B (en) * | 2019-10-31 | 2021-04-27 | 中冶宝钢技术服务有限公司 | Dismounting device and dismounting method for blanking flow regulating valve for blast furnace |
-
2008
- 2008-03-12 CN CNB2008100694638A patent/CN100560738C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 马钢2500m3高炉料流调节阀故障诊断分析. 徐剑峰.炼铁，第22增刊卷. 2003 |
| 马钢2500m3高炉料流调节阀故障诊断分析. 徐剑峰.炼铁，第22增刊卷. 2003 * |
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| Publication number | Publication date |
|---|---|
| CN101245397A (en) | 2008-08-20 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20140312 |