CN203534762U - Furnace mouth pressure measuring unit with nitrogen purging function - Google Patents
Furnace mouth pressure measuring unit with nitrogen purging function Download PDFInfo
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- CN203534762U CN203534762U CN201320672483.0U CN201320672483U CN203534762U CN 203534762 U CN203534762 U CN 203534762U CN 201320672483 U CN201320672483 U CN 201320672483U CN 203534762 U CN203534762 U CN 203534762U
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- valve
- solenoid valve
- fire door
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- pipeline
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Abstract
The utility model discloses a furnace mouth pressure measuring unit with a nitrogen purging function. The unit comprises a nitrogen source (10) and a first solenoid valve (13) that are successively connected along the direction of an air flow in the pipeline. The pipeline is divided into two branches starting at the outlet of the first solenoid valve (13), one branch communicating the furnace mouth, and the other branch communicating the atmosphere. The two branches are provided with second solenoid valves (16). The two branches are finally connected to the positive and the negative pressure interfaces of a micro differential pressure transmitter (21) through a three-valve manifold (22). A branch pipeline is in parallel connection between the inlet and the outlet of the first solenoid valve (13). A by-passing valve (18) is disposed on the branch pipeline in parallel connection with the first solenoid valve (13). The purging/pressure measuring alternative period of the unit is synchronous with the converter production period with tight cooperation. A PLC is used for achieving interlock control of converter production, setting automatic purging time and frequency, and preventing a pressure tap from being blocked.
Description
Technical field
The utility model relates to a kind of converter mouth pressure tester, relates in particular to a kind of fire door pressure measurement (being that error of measurement is pressed) device with nitrogen blowing function.
Background technology
Converter mouth differential pressure is controlled in converter production extremely important, and it is one of key factor affecting coal gas of converter composition and coal gas amount that converter mouth differential pressure is controlled, and in order to improve coal-gas recovering amount, must accurately control furnace pressure in an optimum range.
And converter mouth pressure force measurement is the key factor that determines to control furnace pressure precision.Conventionally the tonometric pressure tappings of converter mouth position is near fire door, by pressure tappings to pressure-measuring instrument---differential pressure transmitter is to connect by annular pressure pipeline, completes pressure survey.
Because dustiness in converter gas is large, easily there is pressure line clogging, thereby affect pressure survey, therefore need to carry out regular dedusting to ensure normal pressure survey to pressure pipeline.
Summary of the invention
In order to overcome the shortcoming and deficiency of prior art, the technical problems to be solved in the utility model is to provide a kind of fire door pressure tester with nitrogen blowing function forming by increase nitrogen purging device in converter mouth pressure tester.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of fire door pressure tester with nitrogen blowing function, comprise along airflow direction in pipeline successively connected source nitrogen and the first solenoid valve, pipeline is divided into two since the outlet of the first solenoid valve, Yi Ge branch connects fire door, another branch connects atmosphere, in Zhe Liangge branch, be all provided with the second solenoid valve, Zhe Liangge branch is finally connected respectively on the positive and negative pressure interface of differential pressure transmitter by three valve groups, wherein, a branch line in parallel between the entrance and exit of the first solenoid valve, the branch line in parallel with the first solenoid valve is provided with by-pass valve.
For the above-mentioned fire door pressure tester with nitrogen blowing function, the first solenoid valve and two the second solenoid valves are electrically connected to programmable logic controller (PLC).
For the above-mentioned fire door pressure tester with nitrogen blowing function, the first solenoid valve is closed type two-position two-way solenoid valve.
For the above-mentioned fire door pressure tester with nitrogen blowing function, two the second solenoid valves are open type two-position two-way solenoid valves.
For the above-mentioned fire door pressure tester with nitrogen blowing function, it is characterized in that, by-pass valve is bypass cutoff valve.
The above-mentioned fire door pressure tester with nitrogen blowing function is also included in the source of the gas ball valve between source nitrogen and the first solenoid valve.
The above-mentioned fire door pressure tester with nitrogen blowing function is also included in the source of the gas filtering pressure reducing valve between source nitrogen and the first solenoid valve.
The above-mentioned fire door pressure tester with nitrogen blowing function is also included in the retaining valve of upper the second solenoid valve upstream of branch that connects fire door and the one-way throttle valve of the second solenoid valve upstream in the branch that connects atmosphere.
The above-mentioned fire door pressure tester with nitrogen blowing function is also included in the source of the gas ball valve in upper the second solenoid valve downstream of branch that connects fire door and the source of the gas ball valve in the second solenoid valve downstream in the branch that connects atmosphere.
For the above-mentioned fire door pressure tester with nitrogen blowing function, the pipeline that is a bit communicated with fire door between retaining valve and the second solenoid valve pipeline is provided with source of the gas ball valve, and the open to atmosphere pipeline that a bit connects between one-way throttle valve and the second solenoid valve pipeline is provided with source of the gas ball valve.
Compared with prior art, the main advantage of technical solutions of the utility model is as follows:
For the large features of dustiness in converter gas, fire door pressure tester is increased to nitrogen blowing function, this purging/pressure measurement alternate cycle with the fire door pressure tester of nitrogen blowing function will be synchronizeed with Converter production period, closely cooperate, by PLC, complete the interlocked control of producing with converter, and set automatic blowing time and the frequency, solve the susceptible to plugging practical problems of pressure tappings.
Accompanying drawing explanation
Fig. 1 is the principle schematic described in embodiment of the utility model with the fire door pressure tester of nitrogen blowing function.
Embodiment
With reference to Fig. 1, the fire door pressure tester with nitrogen blowing function described in one embodiment of the invention comprises along airflow direction in pipeline successively connected source nitrogen 10 and the first solenoid valve 13, pipeline is divided into two since the outlet of the first solenoid valve 13, Yi Ge branch connects fire door, another branch connects atmosphere, in Zhe Liangge branch, be all provided with the second solenoid valve 16, Zhe Liangge branch is finally connected respectively on the positive and negative pressure interface of differential pressure transmitter 21 by three valve groups 22.Wherein, a branch line in parallel between the entrance and exit of the first solenoid valve 13, the branch line in parallel with the first solenoid valve 13 is provided with by-pass valve 18.
Wherein, the first solenoid valve 13 is normal-closed electromagnetic valves, is preferably closed type two-position two-way solenoid valve, and two the second solenoid valves 16 are normal-open electromagnetic valves, are preferably open type two-position two-way solenoid valve, and by-pass valve 18 is bypass cutoff valves.Three valve groups 22 are matching used with differential pressure transmitter 21, and effect is by positive and negative pressure measuring chamber and the conducting of impulse point or disconnection, and can carry out balance check to differential pressure transmitter.
Preferably, this fire door pressure tester with nitrogen blowing function is also included in source of the gas ball valve 11 and the source of the gas filtering pressure reducing valve 12 between source nitrogen 10 and the first solenoid valve 13.This fire door pressure tester with nitrogen blowing function can also be included in and connects the retaining valve 15 of upper the second solenoid valve 16 upstreams of branch and the source of the gas ball valve 17 in the second solenoid valve 16 downstreams of fire door and be connected the one-way throttle valve 14 of the second solenoid valve 16 upstreams in the branch of atmosphere and the source of the gas ball valve 17 in the second solenoid valve 16 downstreams.In addition, the pipeline that is a bit communicated with fire door between retaining valve 15 and the second solenoid valve 16 pipeline is provided with source of the gas ball valve 11, and the open to atmosphere pipeline that a bit connects between one-way throttle valve 14 and the second solenoid valve 16 pipeline is provided with source of the gas ball valve 11.
The first solenoid valve 13 and two the second solenoid valves 16 are electrically connected to programmable logic controller (PLC) (Programmable Logic Controller, PLC), by the break-make of PLC Long-distance Control the first solenoid valve 13 and two the second solenoid valves 16, thus PLC according to different state of the art by these solenoid valves of programming Control electric or dead electricity realizes the switching of valve.When PLC detects fire door pressure tester and enters error of measurement pressure condition, close the first solenoid valve 13 and open two the second solenoid valves 16.When PLC detects in converter that oxygen rifle is mentioned, make fire door pressure tester enter pressure tappings and purge state, open the first solenoid valve 13 and close two the second solenoid valves 16, because the first solenoid valve 13 is closed type two-position two-way solenoid valve, PLC controls the first solenoid valve 13 and obtains electric opening, because the second solenoid valve 16 is open type two-position two-way solenoid valve, PLC controls the second solenoid valve 16 and obtains electric closing.Other valves are hand valve.
The purging of pressure pipeline only carries out in converter debug process, does not carry out the purging of pressure pipeline in converter normal productive process.When converter is normally produced, fire door pressure tester only has two states, one is that one of error of measurement pressure condition is that pressure tappings purges state, and the most of the time is in error of measurement pressure condition, only have when oxygen rifle is mentioned, just carry out pressure tappings purge, these two processes are all to be realized by the break-make of PLC Long-distance Control the first solenoid valve 13 and the second solenoid valve 16, remaining valve is all hand valve, after on off state mixes up in converter debug process, in error of measurement pressure condition and pressure tappings purging state, do not need to change.
Below, to thering is the principle of work of the fire door pressure tester of nitrogen blowing function described in above-described embodiment, describe.
S1 carries out pipeline purging in the converter debug phase: in order fully to purge the dust in cleaning pipeline before fire door pressure tester is used, by three valve group 22 Close Alls of two ball valves 17 near on two of the left and right pipeline of differential pressure transmitter 21 and differential pressure transmitter 21, open three source of the gas ball valves 11, open source of the gas filtering pressure reducing valve 12, open by-pass valve 18, carry out pipeline purging, and at this moment, closed type two-position two-way solenoid valve 13 is in closed condition, two open type two-position two-way solenoid valves 16 are in open mode, one-way throttle valve 14 and retaining valve 15 are pressed airflow direction normal mounting in pipeline, thereby out-of-date in nitrogen purge gas flow, one-way throttle valve 14 and retaining valve 15 are in unidirectional open mode.After pipeline has purged, by-pass valve 18 cuts out, all the other valves maintain the original state.
S2 error of measurement pressure condition is the main state during converter is produced: S2-1 initialization fire door pressure tester, for fear of differential pressure transmitter 21 is produced and impacted, the three valve groups 22 of slowly opening two ball valves 17 and differential pressure transmitter 21, make differential pressure transmitter 21 enter duty.In converter normal productive process, two ball valves 17 and three valve groups 21 keep this state constant always, unless during entering stop production to overhaul, can close ball valve 17, maintenance differential pressure transmitter 21.State when all the other valves all remain on S1.When S2-2 carries out the measurement of fire door differential pressure when fire door pressure tester, the break-make of each solenoid valve of PLC Long-distance Control, closed type two-position two-way solenoid valve 13 is closed, nitrogen source of the gas 10 is cut off by closed type two-position two-way solenoid valve 13, open type two-position two-way solenoid valve 16 is opened, the gaseous tension of two stopple coupons of fire door enters differential pressure transmitter 21 by two open type two-position two-way solenoid valves 16 and measures, and all the other valves all remain on current state.
When S3 mentions when oxygen rifle, enter pressure tappings and purge state: for pressure tappings is carried out to nitrogen blowing, two open type two-position two-way solenoid valves of remote PLC control 16 obtain electric closing, and closed type two-position two-way solenoid valve 13 obtains electric opening, and purging nitrogen enters fire door and carries out nitrogen blowing.State when all the other valves all remain on S2.
After pressure tappings has purged, all valve states remain unchanged, when fire door pressure tester enters error of measurement pressure condition, the state of each solenoid valve can be by the change of PLC Long-distance Control, closed type two-position two-way solenoid valve 13 is closed, and open type two-position two-way solenoid valve 16 is opened, and other valves are hand valve, state remains unchanged, and refers to process S2-2.
Claims (10)
1. a fire door pressure tester with nitrogen blowing function, it is characterized in that, this device comprises along airflow direction in pipeline successively connected source nitrogen (10) and the first solenoid valve (13), pipeline is divided into two since the outlet of the first solenoid valve (13), Yi Ge branch connects fire door, another branch connects atmosphere, in Zhe Liangge branch, be all provided with the second solenoid valve (16), Zhe Liangge branch is finally just being connected respectively to differential pressure transmitter (21) by three valve groups (22), on negative pressure interface, wherein, a branch line in parallel between the entrance and exit of the first solenoid valve (13), the branch line in parallel with the first solenoid valve (13) is provided with by-pass valve (18).
2. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, is characterized in that, the first solenoid valve (13) and two the second solenoid valves (16) are electrically connected to programmable logic controller (PLC).
3. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, is characterized in that, the first solenoid valve (13) is closed type two-position two-way solenoid valve.
4. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, is characterized in that, two the second solenoid valves (16) are open type two-position two-way solenoid valves.
5. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, is characterized in that, by-pass valve (18) is bypass cutoff valve.
6. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, is characterized in that, is also included in the source of the gas ball valve (11) between source nitrogen (10) and the first solenoid valve (13).
7. the fire door pressure tester as described in claim 1 or 6 with nitrogen blowing function, is characterized in that, is also included in the source of the gas filtering pressure reducing valve (12) between source nitrogen (10) and the first solenoid valve (13).
8. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, it is characterized in that, be also included in the retaining valve (15) of upper the second solenoid valve of branch (16) upstream that connects fire door and the one-way throttle valve (14) of the second solenoid valve (16) upstream in the branch that connects atmosphere.
9. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, it is characterized in that, be also included in the source of the gas ball valve (17) in upper the second solenoid valve of branch (16) downstream that connects fire door and the source of the gas ball valve (17) in the second solenoid valve (16) downstream in the branch that connects atmosphere.
10. the fire door pressure tester as claimed in claim 1 with nitrogen blowing function, it is characterized in that, the pipeline that is a bit communicated with fire door between retaining valve (15) and the second solenoid valve (16) pipeline is provided with source of the gas ball valve (11), and the open to atmosphere pipeline that a bit connects between one-way throttle valve (14) and the second solenoid valve (16) pipeline is provided with source of the gas ball valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320672483.0U CN203534762U (en) | 2013-10-29 | 2013-10-29 | Furnace mouth pressure measuring unit with nitrogen purging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320672483.0U CN203534762U (en) | 2013-10-29 | 2013-10-29 | Furnace mouth pressure measuring unit with nitrogen purging function |
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| Publication Number | Publication Date |
|---|---|
| CN203534762U true CN203534762U (en) | 2014-04-09 |
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| CN201320672483.0U Expired - Fee Related CN203534762U (en) | 2013-10-29 | 2013-10-29 | Furnace mouth pressure measuring unit with nitrogen purging function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258587A (en) * | 2014-09-26 | 2015-01-07 | 安徽淮化股份有限公司 | Negative steam-adding device of vacuum equipment instrument for producing industrial urea and use method thereof |
| CN105628290A (en) * | 2016-03-30 | 2016-06-01 | 吴斌 | Novel gas-phase differential pressure measuring device |
| CN105779685A (en) * | 2016-03-23 | 2016-07-20 | 中冶南方工程技术有限公司 | Device and method for safely measuring and purging micro-differential pressure of converter mouth |
| CN105969933A (en) * | 2016-06-16 | 2016-09-28 | 北京博鹏北科节能环保股份有限公司 | Device and method for controlling converter mouth micro-differential pressure in converter flue gas dry dedusting system |
| CN106011364A (en) * | 2016-08-01 | 2016-10-12 | 南京金瀚环保科技有限公司 | Wet-method primary dust-proof micro pressure difference anti-blocking method of steel-making converter |
-
2013
- 2013-10-29 CN CN201320672483.0U patent/CN203534762U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104258587A (en) * | 2014-09-26 | 2015-01-07 | 安徽淮化股份有限公司 | Negative steam-adding device of vacuum equipment instrument for producing industrial urea and use method thereof |
| CN105779685A (en) * | 2016-03-23 | 2016-07-20 | 中冶南方工程技术有限公司 | Device and method for safely measuring and purging micro-differential pressure of converter mouth |
| CN105628290A (en) * | 2016-03-30 | 2016-06-01 | 吴斌 | Novel gas-phase differential pressure measuring device |
| CN105969933A (en) * | 2016-06-16 | 2016-09-28 | 北京博鹏北科节能环保股份有限公司 | Device and method for controlling converter mouth micro-differential pressure in converter flue gas dry dedusting system |
| CN105969933B (en) * | 2016-06-16 | 2017-11-21 | 北京博鹏北科节能环保股份有限公司 | Micro-differential pressure control device and control method in converter gas dry-dedusting system |
| CN106011364A (en) * | 2016-08-01 | 2016-10-12 | 南京金瀚环保科技有限公司 | Wet-method primary dust-proof micro pressure difference anti-blocking method of steel-making converter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20171029 |