CN203373388U - Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system - Google Patents
Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system Download PDFInfo
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- CN203373388U CN203373388U CN201320343825.4U CN201320343825U CN203373388U CN 203373388 U CN203373388 U CN 203373388U CN 201320343825 U CN201320343825 U CN 201320343825U CN 203373388 U CN203373388 U CN 203373388U
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- ball valve
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Abstract
The utility model discloses a reliable low-risk RH (Relative Humidity) nitrogen-argon switching system which comprises an argon and nitrogen switchable header pipe, a plurality of branch pipes communicated with the header pipe and a plurality of small ventilating pipes of ascension pipes, wherein the branch pipes are connected with the small ventilating pipes through metal hoses, the header pipe is provided with a header pipe flowmeter, a first pneumatic cut-off ball valve and a first check valve, and each branch pipe is provided with a branch pipe flowmeter controlled by a PLC (Programmable Logic Controller), a thin film adjusting valve and a first ball valve. The difference of the system is as follows: the argon introducing header pipe and the branch pipes are additionally provided with bypass pipelines and are provided with control valves. According to the system disclosed by the utility model, normal gas supply by the ventilating pipelines of the ascension pipes can be ensured to satisfy the production demand, ensure smooth production, improve the production efficiency and lower the production and maintenance cost.
Description
Technical field
The utility model relates to nitrogen argon switched system, refers to particularly a kind of reliable low-risk RH nitrogen argon switched system.
Background technology
RH claims again vacuum circulation degassing method, is a kind of molten steel vacuum-treat technology, and it combines vacuum refinement and Circulating Flow of Molten Steel.Adopt RH technique can shorten Converter production period, improve recovery rate, save reductor and alloying element, improve steel quality, but and degassed processing general shortening heat treatment time afterwards, obtain economical effectiveness preferably.Be particularly suitable for the production of the variety steels such as ultra low-carbon steel, silicon steel, pipe line steel.
The RH technological principle is to utilize vacuum pump system to make whole system produce negative pressure, promote ladle and make molten steel submergence tubular stinger 500 ~ 700mm depths, pass into argon gas as driving gas in the tubular stinger upcast, argon gas is sneaked into molten steel diminishes molten steel density, under the normal atmosphere operation of nature, molten steel can rise in vacuum chamber along upcast, and now argon gas separates with molten steel and taken away as waste gas, molten steel density becomes again greatly, along downtake, flows back in ladle.Go round and begin again, molten steel is ceaselessly circulated in vacuum chamber.Simultaneously, the size of driving gas flow is constantly regulated variation with process node.When having a rest product or maintenance, for energy efficient, the tubular stinger supply air line can switch to nitrogen.
The tubular stinger supply air line is to be distributed to the arm of six roots of sensation DN15mm by the house steward of DN32m, and six roots of sensation arm is connected with the ventilative tubule of the upcast six roots of sensation respectively by metallic hose.Under meter of the upper design and installation of house steward and a pneumatic cut-off ball valve, install a under meter and a diaphragm valve on every arm, by PLC, automatically controlled.If computer arranges the ventilative total amount 120m3/h of tubular stinger, being averagely allocated to so every arm flow is 20m3/h.The diaphragm valve of every arm carrys out the auto-adjustment control opening degree according to the flow by this pipeline, makes it and sets flow and be complementary.Once yet the power down of PLC template occur, compressed air pressure is inadequate, under meter metering fault or diaphragm valve feedback fault etc., will cause the upcast air feed abnormal, molten steel now just infiltrates in upcast and solidifies in ventilative tubule, and blocking pipeline, cause tubular stinger to be scrapped, cause to produce and interrupt, have a strong impact on the production of silicon steel.In earlier stage, similarly equipment failure together will occur in every about 2 months, cause equipment, starting material to lose up to tens0000 yuan, production is caused and has a strong impact on.
Summary of the invention
The purpose of this utility model will overcome the existing deficiency of prior art exactly, and a kind of reliable low-risk RH nitrogen argon switched system is provided.
For achieving the above object, the designed reliable low-risk RH nitrogen argon switched system of the utility model, the house steward who comprises changeable argon gas and nitrogen, many arms that are communicated with house steward and the ventilative tubule of many upcasts, described arm is connected with ventilative tubule by metallic hose, total flowmeter for pipe is installed on described house steward, the first pneumatic cut-off ball valve and the first vacuum breaker, a flowmeter for pipe of being controlled by PLC is installed on described every arm, diaphragm valve and the first ball valve, its special feature is: the house steward of described logical argon gas and Duo Gen arm all have additional by-pass line, and installation by-pass valve control.
Preferably, on the first pneumatic cut-off ball valve of the house steward of described logical argon gas, have additional house steward's by-pass line, the second pneumatic cut-off ball valve and the second vacuum breaker are installed on described house steward's by-pass line.Like this, at total flowmeter for pipe metering fault, gas can enter by house steward's by-pass line the ventilative tubule of upcast.
Preferably, have additional the arm by-pass line on the diaphragm valve of described arm, described arm by-pass line is equipped with the second ball valve.Like this, under meter metering fault or diaphragm valve feedback fault, gas can enter by the arm by-pass line the ventilative tubule of upcast.
No matter when normally the beneficial effects of the utility model are: adopt technique scheme, can guarantee the ventilative pipeline of upcast air feed, to meet Production requirement, guarantee the production direct motion, enhance productivity, reduce and produce and maintenance cost.
Compared following advantage with on-the-spot practical effect before transformation:
1, the power down of PLC template occurs in no matter producing, compressed air pressure is inadequate, any one fault such as under meter metering, diaphragm valve feedback, and the tubular stinger that can not the cause latch up phenomenon of breathing freely, the mean lifetime of tubular stinger is improved.The most obvious effect is that the production interruption caused because of the ventilative fault of tubular stinger has been zero by the original whole year that often bimonthly has been reduced to
2, extend the mean life of vacuum chamber, reduced the vacuum chamber replacement frequency, greatly reduced workman's labour intensity, also reduced the probability that in the operation, security incident occurs simultaneously.
3, reduced the consumption of tubular stinger spare part, stopped to interrupt because of the production that ventilative fault causes, reduced and produced raw-material waste, within 1 year, saving spare part, production material cost exceed 1,000,000.
4, transformation is simple, easy to operate, spare parts cost is low, popularization power is strong, be applicable to the conveying of production medium needs emergent position.
The accompanying drawing explanation
Fig. 1 is the structural representation of the front RH nitrogen argon switched system of transformation.
Fig. 2 is the structural representation of the rear RH nitrogen argon switched system of transformation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
RH nitrogen argon switched system before transformation shown in Fig. 1, the ventilative tubule 4 that comprises the house steward 1 of changeable argon gas and nitrogen, the six roots of sensation arm 2 be communicated with house steward 1 and six roots of sensation upcast, arm 2 is connected with ventilative tubule 4 by metallic hose 3, and ventilative tubule 4 is connected with vacuum chamber 7.Total flowmeter for pipe 1.1, the first pneumatic cut-off ball valve 1.2 and the first vacuum breaker 1.3 are installed on house steward 1, on every arm 2, flowmeter for pipe 2.1, diaphragm valve 2.2 and the first ball valve 2.3 of being controlled by PLC are installed.
Shown in Fig. 2, reliable low-risk RH nitrogen argon switched system after transformation, have additional house steward's by-pass line 5 on the first pneumatic cut-off ball valve 1.2 of the house steward 1 of logical argon gas, and the second pneumatic cut-off ball valve 5.1 and the second vacuum breaker 5.2 are installed on house steward's by-pass line 5.Have additional arm by-pass line 6 on the diaphragm valve 2.2 of arm 2, arm by-pass line 6 is equipped with the second ball valve 6.1.
Working process of the present utility model:
Before starting to process molten steel by RH technique, the first pneumatic cut-off ball valve 1.2 of the house steward 1 of logical argon gas and the second pneumatic cut-off ball valve 5.1 on house steward's by-pass line 5 are opened simultaneously.Aborning, make house steward 1 pipeline and its by-pass line parallel running, if, in the situation that every arm 2 upper film variable valve 2.2 cut out fully, by regulating the second ball valve 6.1 of arm by-pass line 6, can make a flowmeter for pipe 2.1 of every arm 2 be shown as 5m3/h.
Like this, in the situation that any fault occurs, there is all the time gas to enter the ventilative tubule 4 of upcast by arm by-pass line 6, fundamentally solved the problem that permeability cell stops up.
Claims (3)
1. a reliable low-risk RH nitrogen argon switched system, the house steward (1) who comprises switchable argon gas and nitrogen, the many arms (2) that are communicated with house steward (1) and the ventilative tubule (4) of many upcasts, described arm (2) is connected with ventilative tubule (4) by metallic hose (3), total flowmeter for pipe (1.1) is installed on described house steward (1), the first pneumatic cut-off ball valve (1.2) and the first vacuum breaker (1.3), a flowmeter for pipe (2.1) of being controlled by PLC is installed on described every arm (2), diaphragm valve (2.2) and the first ball valve (2.3), it is characterized in that: the house steward of described logical argon gas (1) and many arms (2) all have additional by-pass line, and installation by-pass valve control.
2. reliable low-risk RH nitrogen argon switched system according to claim 1, it is characterized in that: have additional house steward's by-pass line (5) on the first pneumatic cut-off ball valve (1.2) of the house steward of described logical argon gas (1), the second pneumatic cut-off ball valve (5.1) and the second vacuum breaker (5.2) are installed on described house steward's by-pass line (5).
3. reliable low-risk RH nitrogen argon switched system according to claim 1 and 2, it is characterized in that: have additional arm by-pass line (6) on the diaphragm valve (2.2) of described arm (2), described arm by-pass line (6) is equipped with the second ball valve (6.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320343825.4U CN203373388U (en) | 2013-06-17 | 2013-06-17 | Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320343825.4U CN203373388U (en) | 2013-06-17 | 2013-06-17 | Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203373388U true CN203373388U (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320343825.4U Expired - Fee Related CN203373388U (en) | 2013-06-17 | 2013-06-17 | Reliable low-risk RH (Relative Humidity) nitrogen-argon switching system |
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| Country | Link |
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| CN (1) | CN203373388U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866091A (en) * | 2014-03-31 | 2014-06-18 | 中冶南方工程技术有限公司 | Method and device for supplying nitrogen and argon gases by virtue of RH (Ruhrstahl Heraeus) vacuum chamber insert tube |
| CN114875210A (en) * | 2022-03-30 | 2022-08-09 | 山东莱钢永锋钢铁有限公司 | Automatic nitrogen-argon switching process for refining furnace |
-
2013
- 2013-06-17 CN CN201320343825.4U patent/CN203373388U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866091A (en) * | 2014-03-31 | 2014-06-18 | 中冶南方工程技术有限公司 | Method and device for supplying nitrogen and argon gases by virtue of RH (Ruhrstahl Heraeus) vacuum chamber insert tube |
| CN103866091B (en) * | 2014-03-31 | 2016-03-02 | 中冶南方工程技术有限公司 | A kind of RH vacuum chamber tubular stinger nitrogen argon air supply method and device |
| CN114875210A (en) * | 2022-03-30 | 2022-08-09 | 山东莱钢永锋钢铁有限公司 | Automatic nitrogen-argon switching process for refining furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170717 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 15 Wuchang, Wuhan Friendship Avenue, No. 999, block A, layer (Wuhan Iron and steel science and technology innovation department), No. 430080, Patentee before: Wuhan Iron & Steel (Group) Corp. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20190617 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |