CN105987810B - Method for detecting whether electromagnetic valve of nitrogen pressure tank fails - Google Patents
Method for detecting whether electromagnetic valve of nitrogen pressure tank fails Download PDFInfo
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- CN105987810B CN105987810B CN201510080563.0A CN201510080563A CN105987810B CN 105987810 B CN105987810 B CN 105987810B CN 201510080563 A CN201510080563 A CN 201510080563A CN 105987810 B CN105987810 B CN 105987810B
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- nitrogen
- air intake
- nitrogen pressure
- intake valve
- drain tap
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 251
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 124
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 59
- 230000008878 coupling Effects 0.000 claims description 43
- 238000010168 coupling process Methods 0.000 claims description 43
- 238000005859 coupling reaction Methods 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000000418 atomic force spectrum Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000003020 moisturizing effect Effects 0.000 description 7
- 239000013589 supplement Substances 0.000 description 4
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
- Magnetically Actuated Valves (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention provides a method for detecting whether a nitrogen pressure tank electromagnetic valve has a fault, which is characterized in that the nitrogen pressure tank electromagnetic valve is detected by adopting a method combining computer detection and field pipeline detection to judge whether the nitrogen pressure tank electromagnetic valve has a fault of untight closing or automatic opening and can more quickly judge whether the electromagnetic valve works normally. If a fault occurs, the position of the electromagnetic valve with the fault can be accurately judged, and shortcuts such as analysis, judgment, maintenance and the like are provided for production, so that the normal operation of a water circulation system in a blast furnace and hot blast stove demineralized water closed circulation system is ensured, the service life of equipment is prolonged, and the normal production of the blast furnace is ensured.
Description
Technical field
The present invention relates to a kind of methods whether detection nitrogen pressure tank solenoid valve breaks down.
Background technique
Circulation water of blast furnace system process approximately as: the industrial fresh water from water supply plant first passes through mechanical filter mistake
Filter removes the cation in water removal, enters removing carbon dioxide device using the overbottom pressure of water, utilize intermediate water tank subsequently into cation bed
Storage and regulating pondage effect, middle water pump absorb water from intermediate water tank, pressurize, and remove the anion in water, storage into anion bed
As the supplement water of recirculated water in sweet-water tank.Water level with the consumption of water in closed cycle water system, in nitrogen pressure tank
When being reduced to the low water level of design, chain small pump starts automatically with water-level gauge, the water in sweet-water tank is extracted, by removing
Oxygen device deoxygenation is added in nitrogen pressure tank, continuously recycles for circulation water flow.
In blast furnace and hot-blast stove demineralized water closed cycle water system, nitrogen presses tank as important moisturizing facility, is normally transporting
In row situation, upper part is full of nitrogen, and lower part is full of water, presses tank water-level gauge and small pump chain by nitrogen, and control small pump exists
Low water level starts moisturizing, and high water level is automatically stopped operation, guarantees that nitrogen presses in tank water level to maintain normal interval: 2.2 meters to 2.4
Rice, it is ensured that water shortage or water cannot be not excessive in circulation.If a large amount of water shortages in system, the water in pipeline is discontinuous,
Water would not form circulation, and the water in system is excessive, then pressure, which can be higher than design pressure, leads to weak part leak, to life
The high and stable yields for producing operation brings huge hidden danger.Therefore normal water level is that circulation flow is maintained to have abundance in nitrogen pressure tank
Water and continuous and steady operation provides safeguard.It is underheat degree that is energy saving, keeping water that nitrogen, which presses the nitrogen main function on tank top, smooth
Moisturizing, the effects of expanding with heat and contract with cold of buffered water.Blast furnace closed cycle water system in operation, will lead to pipeline under certain conditions
Interior water total volume increases, and water is full of in pipeline, and water is not easy to be compressed, therefore nitrogen pressure tank becomes the slow of water volume in water system
The metering facility of facility and moisturizing, sluicing is rushed, can normally supplement and maintains nitrogen amount in the normal range, is that water safety is protected
Hinder extremely important link.
However in the actual production process, it often will appear the phenomenon that nitrogen pressure tank electromagnetic valve is not closed completely, solenoid valve
Once being not closed completely, the nitrogen amount allowed in nitrogen pressure tank is unable to maintain that in the normal range door, will result in system at this time
The imbalance of pressure in portion, direct result are exactly that the hydraulic pressure of water circulation system is caused to increase sharply, and pump inlet pressure increases sharply, outlet pressure
It increases sharply therewith, and when pressure has been more than the maximum working (operation) pressure (MWP) of pipeline and watering equipment, it is broken that circulation just will appear pipeline
It splits, sealing position leak can not only shorten the service life of equipment, and will cause blast furnace and be forced damping down and can not normally produce.
Another situation is the failure that electromagnetic valve is fail to open, when pressure occurs relatively low or higher, electromagnetism
Valve, which cannot automatically turn on perhaps to close, leads in nitrogen pressure tank that nitrogen pressure is too low or mistake for adjusting pressure to normal range (NR)
Height, the equipment in circulation will appear exception, even result in equipment damage.
Summary of the invention
The object of the present invention is to provide a kind of methods whether detection nitrogen pressure tank solenoid valve breaks down, using calculating machine examination
It surveys and live pipeline detects the method combined, nitrogen pressure tank solenoid valve is detected, judge whether nitrogen pressure tank solenoid valve occurs
The failure that is not closed completely or can not automatically turn on can faster judge whether solenoid valve is working properly.As faulty,
It can more accurately judge the position of the solenoid valve to break down, provide the quick side such as analysis, judgement, maintenance for production
Formula, to ensure that in blast furnace and hot-blast stove desalination closed water circulation system, the normal operation of water circulation system extends equipment
Service life, ensure that the normal production of blast furnace.
To achieve the above object, the present invention is implemented with the following technical solutions:
A method of whether detection nitrogen pressure tank solenoid valve breaks down, including following method:
1) first in structure: being disposed on the nitrogen inlet duct road of nitrogen pressure tank, on the direction of input nitrogen
Air intake valve b, air intake valve a are disposed with exhaust on the nitrogen exhaust pipe road of nitrogen pressure tank, on the direction of discharge nitrogen
Valve a, drain tap b；In the direction of input nitrogen, the coupling part before air intake valve a is increased to the soft company of quick coupling
It connects, in the direction of denitrogen gas, the subsequent coupling part drain tap b is increased into being flexible coupling for quick coupling；
2) method combined is detected with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve has closing
It is not tight；
3) pass through COMPUTER DETECTION and detect the method combined with live pipeline, whether detection nitrogen pressure tank solenoid valve can not be certainly
It is dynamic to open.
Described detects the method combined with live pipeline by COMPUTER DETECTION, and whether detection nitrogen pressure tank solenoid valve has
The method and step being not closed completely is as follows:
1) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated and upwards, then to
Under, be to enter nitrogen pressure tank always due to nitrogen, in the nitrogen pressure upper limit, drain tap opens denitrogen, using curvilinear characteristic and
Electromagnetic valve shows that signal may determine that, it may be possible to which nitrogen air intake valve is not closed completely, and PV value is always in the upper limit at this time；
2) carry out live pipeline detection: closing air intake valve a, drain tap a and air intake valve b, unclamp air intake valve a and
Be flexible coupling lock and the lower quick coupling of disassembly between air intake valve b, check whether air intake valve a and air intake valve b has leakage,
Illustrate that air intake valve a or air intake valve b are not closed completely if any leakage；
3) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated and downwards, then to
On, be that nitrogen pressure tank is discharged always due to nitrogen, limit under nitrogen pressure, air intake valve is opened into nitrogen, using curvilinear characteristic and
Electromagnetic valve shows that signal may determine that, it may be possible to which drain tap is not closed completely close, and PV value is always in lower limit at this time；
4) it carries out live pipeline detection: (1) closing drain tap a, being flexible coupling after release drain tap b is latched and torn open
Quick coupling is unloaded, has seen whether leakage, illustrates that drain tap a is not closed completely if any leakage；(2) drain tap b, pine are closed
Being flexible coupling after air valve b that begin to rehearse and dismantles lower contact at lock, has seen whether leakage, has illustrated drain tap b if any leakage
It is not closed completely.
Described to detect the method combined with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve can not
The method and step of automatic opening is as follows:
1) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when air intake valve is fail to open, nitrogen without
Method supplement, pressure become smaller always, and direction of a curve reduces downwards, and nitrogen pressure reduces, and curves of water level is then in rising trend；In conjunction with nitrogen
Atmospheric pressure curve values and PV value become smaller, curves of water level value increases, and judgement, which is likely to be air intake valve, to be automatically turned on；
2) it carries out live pipeline detection: closing drain tap a, unclamp being flexible coupling between air intake valve a and air intake valve b
Lower quick coupling is latched and dismantled, air intake valve a and air intake valve b are detected；
3) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when drain tap is fail to open, due to nitrogen
Gas can not be discharged, and pressure increases always, and direction of a curve ramps up, and nitrogen pressure increases, and curves of water level is then on a declining curve；Knot
The variation of conjunction nitrogen pressure curve values and PV value increase, curves of water level is on a declining curve, and judgement is likely to be drain tap can not
It automatically turns on；
4) carry out live pipeline detection: unclamping being flexible coupling after drain tap b, to drain tap a and drain tap b into
Row detection.
Compared with prior art, the beneficial effects of the present invention are:
A method of whether detection nitrogen pressure tank solenoid valve breaks down, and detects phase using COMPUTER DETECTION and live pipeline
In conjunction with method, nitrogen pressure tank solenoid valve is detected, judges whether nitrogen pressure tank solenoid valve occurs being not closed completely or can not be automatic
The failure of unlatching can faster judge whether solenoid valve is working properly.It is such as faulty, can also more accurately it judge
The position of the solenoid valve to break down, for production provide the shortcuts such as analysis, judgement, maintenance, thus ensure that blast furnace and
In hot-blast stove desalination closed water circulation system, the normal operation of water circulation system extends the service life of equipment, ensure that height
The normal production of furnace.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for needing to judge whether faulty each valve and each connecting line in the present invention.
In figure: 1. air intake valve a., 2. air intake valve b, 3. bypath valve, 4. drain tap a., 5. drain tap b6.
7. nitrogen that are flexible coupling press tank
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing:
As shown in Figure 1, a kind of method whether detection nitrogen pressure tank solenoid valve breaks down, including following method:
1) first in structure: being disposed on the nitrogen inlet duct road of nitrogen pressure tank 7, on the direction of input nitrogen
Air intake valve b2, air intake valve a1 are disposed on the nitrogen exhaust pipe road of nitrogen pressure tank 7, on the direction of discharge nitrogen
Drain tap a4, drain tap b5；In the direction of input nitrogen, the coupling part before air intake valve a1 is increased into quick coupling
Be flexible coupling 6, in the direction of denitrogen gas, be flexible coupling 6 for what the subsequent coupling part drain tap b5 increased quick coupling；
2) method combined is detected with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve has closing
It is not tight；
3) pass through COMPUTER DETECTION and detect the method combined with live pipeline, whether detection nitrogen pressure tank solenoid valve can not be certainly
It is dynamic to open.
By PV value range set by pressure curve on observation computer and control electromagnetic valve switch, in conjunction with electromagnetic valve switch
Signal frequent degree can press the working condition of tank solenoid valve to make preliminary judgement in nitrogen.
Described detects the method combined with live pipeline by COMPUTER DETECTION, and whether detection nitrogen pressure tank solenoid valve has
The method and step being not closed completely is as follows:
1) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated and upwards, then to
Under, be to enter nitrogen pressure tank always due to nitrogen, in the nitrogen pressure upper limit, drain tap opens denitrogen, using curvilinear characteristic and
Electromagnetic valve shows that signal may determine that, it may be possible to which nitrogen air intake valve is not closed completely, and PV value is always in the upper limit at this time；
2) it carries out live pipeline detection: closing air intake valve a1, drain tap a4 and air intake valve b2, unclamp air intake valve
Be flexible coupling 6 locks and the lower quick coupling of disassembly between a1 and air intake valve b2, check that air intake valve a1 and air intake valve b2 is
It is no to have leakage, illustrate that air intake valve a1 or air intake valve b2 are not closed completely if any leakage；
3) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated and downwards, then to
On, be that nitrogen pressure tank is discharged always due to nitrogen, limit under nitrogen pressure, air intake valve is opened into nitrogen, using curvilinear characteristic and
Electromagnetic valve shows that signal may determine that, it may be possible to which drain tap is not closed completely close, and PV value is always in lower limit at this time；
4) it carries out live pipeline detection: (1) closing drain tap a4, unclamp 6 locks that are flexible coupling after drain tap b5
And lower quick coupling is dismantled, it has seen whether leakage, has illustrated that drain tap a4 is not closed completely if any leakage；(2) exhaust valve is closed
Door b5 unclamps be flexible coupling 6 locks and the lower quick coupling of disassembly after drain tap b5, leakage has been seen whether, if any leakage
Illustrate that drain tap b5 is not closed completely.
Because computer is presented in the case where nitrogen pressure tank 7 is leaked to connecting pipe between valve and connecting portion
Pressure curve can also occur abnormal curvilinear motion, therefore when carrying out on-site test to each valve, nitrogen should be first checked for
Pressure tank 7 to connecting pipe between valve and connecting portion whether have leakage, in the case where confirming No leakage just can accurate judgement it is each
Whether the working condition of solenoid valve is normal.The method of inspection is: closing air intake valve a1 and drain tap a4, checks that nitrogen presses tank 7
Whether there is leakage to connecting pipe between valve and connecting portion.
Described to detect the method combined with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve can not
The method and step of automatic opening is as follows:
1) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when air intake valve is fail to open, nitrogen without
Method supplement, pressure become smaller always, and direction of a curve reduces downwards, and nitrogen pressure reduces, and curves of water level is then in rising trend；This feelings
Under condition, it will mistakenly believe that water in system and excessively drain, and water shortage in circulation can be aggravated by actually draining.
At this point, becoming smaller in conjunction with nitrogen pressure curve values and PV value, the raising of curves of water level value, should judge to be likely to be intake valve
Door can not automatically turn on；
2) it carries out live pipeline detection: closing drain tap a4, unclamp soft between air intake valve a1 and air intake valve b2
Connection 6 latches and dismantles lower quick coupling, detects to air intake valve a1 and air intake valve b2；
3) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when drain tap is fail to open, due to nitrogen
Gas can not be discharged, and pressure increases always, and direction of a curve ramps up, and nitrogen pressure increases, and curves of water level is then on a declining curve；This
In the case of kind, water shortage in the circulatory system will mistakenly believe that and water is excessive in moisturizing, actually moisturizing aggravation circulation, last nitrogen
Gas is compressed, and nitrogen pressure sharply increases, if safety valve again cannot safe take-off, water pump discharge pressure can be more than design pressure
And it breaks down.
Another extreme case occurred is: safety valve jumping up, nitrogen are discharged rapidly, and water level rapidly goes up, and water level is super
Out after water level metering journey, small pump will mistakenly believe that water shortage and successive moisturizing, will cause a series of harm when serious.
Therefore when observing that nitrogen pressure curve values and PV value increase, curves of water level is on a declining curve, it should judge have
It may be that drain tap can not automatically turn on；
4) live pipeline detection: being flexible coupling after release drain tap b5 is carried out, to drain tap a4 and drain tap
B5 is detected.
Bypath valve 3 belongs to stand-by equipment, when production equipment, which breaks down, normally to provide nitrogen, can open side
Port valve door 3 is to guarantee being normally carried out for production；Bypath valve 3 is not influenced in normally off under conditions of normal production
Normal detection to other each valves and pipeline.
Claims (2)
1. a kind of method whether detection nitrogen pressure tank solenoid valve breaks down, which is characterized in that including following method:
1) first in structure: being disposed with air inlet on the nitrogen inlet duct road of nitrogen pressure tank, on the direction of input nitrogen
Valve b, air intake valve a are disposed with drain tap on the nitrogen exhaust pipe road of nitrogen pressure tank, on the direction of discharge nitrogen
A, drain tap b；In the direction of input nitrogen, the coupling part before air intake valve a is increased into being flexible coupling for quick coupling,
The subsequent coupling part drain tap b is increased being flexible coupling for quick coupling by the direction of denitrogen gas；
2) method combined is detected with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve has closing not
Sternly；
A) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated simultaneously upwards, then downwards, are
Since nitrogen enters always nitrogen pressure tank, in the nitrogen pressure upper limit, drain tap opens denitrogen, using curvilinear characteristic and solenoid valve
Door display signal may determine that, it may be possible to which nitrogen air intake valve is not closed completely, and PV value is always in the upper limit at this time；
B) it carries out live pipeline detection: closing air intake valve a, drain tap a and air intake valve b, unclamp air intake valve a and air inlet
Be flexible coupling lock and the lower quick coupling of disassembly between valve b, check whether air intake valve a and air intake valve b has leakage, if any
Leakage illustrates that air intake valve a or air intake valve b are not closed completely；
C) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, curve are serrated simultaneously downwards, then up, are
Since nitrogen pressure tank is discharged always in nitrogen, limit under nitrogen pressure, air intake valve is opened into nitrogen, using curvilinear characteristic and solenoid valve
Door display signal may determine that, it may be possible to which drain tap is not closed completely close, and PV value is always in lower limit at this time；
D) the live pipeline detection of progress: (1) closing drain tap a, being flexible coupling under lock and disassembly after release drain tap b
Quick coupling has seen whether leakage, illustrates that drain tap a is not closed completely if any leakage；(2) drain tap b is closed, row is unclamped
Be flexible coupling lock and the lower quick coupling of disassembly after air valve b, have seen whether leakage, have illustrated drain tap b if any leakage
It is not closed completely；
3) method combined is detected with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve can not be opened automatically
It opens.
2. a kind of method whether detection nitrogen pressure tank solenoid valve breaks down according to claim 1, which is characterized in that institute
It states and the method combined is detected with live pipeline by COMPUTER DETECTION, whether detection nitrogen pressure tank solenoid valve can not automatically turn on
Method and step is as follows:
1) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when air intake valve is fail to open, nitrogen can not be mended
It fills, pressure becomes smaller always, and direction of a curve reduces downwards, and nitrogen pressure reduces, and curves of water level is then in rising trend；In conjunction with nitrogen pressure
Force curve value and PV value become smaller, curves of water level value increases, and judgement, which is likely to be air intake valve, to be automatically turned on；
2) it carries out live pipeline detection: closing drain tap a, unclamp the lock that is flexible coupling between air intake valve a and air intake valve b
And lower quick coupling is dismantled, air intake valve a and air intake valve b are detected；
3) pass through COMPUTER DETECTION: observation nitrogen pressure plots changes, when drain tap is fail to open, due to nitrogen without
Method discharge, pressure increase always, and direction of a curve ramps up, and nitrogen pressure increases, and curves of water level is then on a declining curve；In conjunction with nitrogen
The variation of atmospheric pressure curve values and PV value increase, curves of water level is on a declining curve, and judgement is likely to be drain tap can not be automatic
It opens；
4) carry out live pipeline detection: drain tap a and drain tap b are examined in being flexible coupling after release drain tap b
It surveys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080563.0A CN105987810B (en) | 2015-02-13 | 2015-02-13 | Method for detecting whether electromagnetic valve of nitrogen pressure tank fails |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510080563.0A CN105987810B (en) | 2015-02-13 | 2015-02-13 | Method for detecting whether electromagnetic valve of nitrogen pressure tank fails |
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| Publication Number | Publication Date |
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| CN105987810A CN105987810A (en) | 2016-10-05 |
| CN105987810B true CN105987810B (en) | 2019-03-26 |
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| CN201510080563.0A Active CN105987810B (en) | 2015-02-13 | 2015-02-13 | Method for detecting whether electromagnetic valve of nitrogen pressure tank fails |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190110582A (en) * | 2017-02-24 | 2019-09-30 | 쟈트코 가부시키가이샤 | Normal determination device of the solenoid control valve |
| CN111947026B (en) * | 2020-08-04 | 2022-03-22 | 鞍钢股份有限公司 | Method for rapidly judging whether gate valve flashboard between nitrogen pressure tank and water replenishing pump falls off or not |
| CN111996319B (en) * | 2020-08-04 | 2021-10-22 | 鞍钢股份有限公司 | High-water-level accident handling method for nitrogen pressure tank of demineralized water system |
| CN111926132A (en) * | 2020-08-04 | 2020-11-13 | 鞍钢股份有限公司 | Method for rapidly judging damage of check valve of blast furnace water pump |
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| CN105987810A (en) | 2016-10-05 |
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