CN103063377B - Rotary drier barrel vapour system leak detecting device and detection method - Google Patents
Rotary drier barrel vapour system leak detecting device and detection method Download PDFInfo
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- CN103063377B CN103063377B CN201310015889.6A CN201310015889A CN103063377B CN 103063377 B CN103063377 B CN 103063377B CN 201310015889 A CN201310015889 A CN 201310015889A CN 103063377 B CN103063377 B CN 103063377B
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Abstract
The present invention relates to a kind of Rotary drier drum steam system leak pick-up unit and detection method, comprise pressurized air input system, control system, Cleaning Principle and method of operating.Input in the cavity in airtight jet chimney and cylinder barrel by adopting pressurized air, adopt the pressure differential before and after compressed-air actuated exert pressure time or pressurize, can detect whether the vapour system of Rotary drier cylinder exists leakage situation easily, for the tobacco quality improving fiber tow production process, the leakage problem that reduces refining losses and repair cut-tobacco drier vapour system in time provide guarantee.
Description
Technical field
The present invention relates to a kind of pick-up unit and detection method of Rotary drier drum steam system leak, mainly for the Rotary drier used on tobacco enterprise primary processing line.Belong to technical field of tobacco machinery.
Background technology
Rotary drier be tobacco industrial enterprise primary processing line on the production equipment of most critical, the quality of drying silk directly has influence on the physical index such as Filling power, whole cut rate, filament broken rate of pipe tobacco, also directly affects the fragrance of cigarette, aesthetic quality's indexs such as gas of mixing.
Rotary drier is primarily of cylinder, hot air circulating system and vapour system composition, and wherein, cylinder is a sealing-type two formula structure be made up of inner and outer wall, is connected the input and output pipeline of steam by one group of ring flange.Usual Rotary drier utilizes the steam of 0.4 ~ 0.5Mpa by heating barrel during interlayer between inside and outside barrel, and pipe tobacco in cut-tobacco drier heats up, dehydration to utilize the temperature of barrel to make, and reaches the object of dry pipe tobacco.During work, the hand valve of vapour system and Pneumatic diaphragm valve are opened, steam enters in the steam comb in the middle of interlayer body by air inlet pipeline, flight temperature in the barrel of baking silk cylinder and cylinder is improved, and the pipe tobacco in thermo-conducting manner directly in heated roller, moisture in pipe tobacco is evaporated, reaches the object of dry pipe tobacco, send vapor-recovery system by the steam tail gas of interlayer body back to by gas exhaust piping or directly enter trench.
Because the inner tube wall of Rotary drier is thinner, and the vapour systems such as steam input and output channel, barrel work for a long time at high temperature under high pressure, because the reason such as corrosion and wearing and tearing cracky leaks, not easily find and dispose, when finding that the vapour system of cut-tobacco drier occurs to leak, if leak and occur in inner wall of rotary drum, its steam leaked out can make the little wet group of pipe tobacco forming section be mixed in pipe tobacco, light then make dried moisture content of cut tobaccos uneven, the pipe tobacco grade of the cigarette in cut-tobacco drier is caused to decline, pipe tobacco by the gross can be caused time serious to scrap, produce huge loss.Temperature simultaneously due to cut-tobacco drier jet chimney, baking silk cylinder barrel is higher, just can place under repair, repair consuming time longer after need waiting until cooling, larger on the impact of fiber tow production.
In current domestic tobacco business, main dependence manually with the naked eye checks in the dried pipe tobacco of tobacco-dryer exit whether contain water percentage wet pipe tobacco bigger than normal, thus judge whether the vapour system of cut-tobacco drier leaks, and whether the vapour system that the detection means of neither one science and method detect cut-tobacco drier leaks.
Summary of the invention
The object of the invention is to above-mentioned prior art not enough, what propose the existing Rotary drier drum steam system of utilization enters steam pipework, dry the space of silk barrel intraformational bed and the formation of row's steam pipework, in the airtight situation of closedown turnover steam valve, introduce a road compressed air system again, by carrying out pressurization to cylinder interlayer and pressurize certain hour, automatic or manual judgement pressing time, system pressure difference before and after pressurize, thus do you judge that this confined space leaks? thus reach the object whether vapour system detecting cut-tobacco drier cylinder before manufacture leakage occurs.
For achieving the above object, the technology of the present invention solution is: a kind of Rotary drier drum steam system leak pick-up unit, Rotary drier is primarily of cylinder, hot air circulating system and vapour system composition, wherein, cylinder is a Double-layer seal type structure be jointly made up of inwall and outer wall, vapour system comprises the steam input pipe connected by one group of ring flange, tail gas efferent duct, valve and steam boiler are formed, it is characterized in that steam input pipe being sequentially equipped with the first thermometer (8), first tensimeter (7), first pressure transducer (6), second Pneumatic diaphragm valve (5) and the second hand valve (4),
Between first pressure transducer (6) and the second Pneumatic diaphragm valve (5) of steam input pipe, pipeline is connected with one group of pressurized air input channel, this pressurized air input channel is made up of the flowmeter sequentially connected (3), the first Pneumatic diaphragm valve (2) and the first hand valve (1), the import of pressurized air input channel directly and pressurized air input system mutually connect
The second thermometer (14), the second tensimeter (13), the second pressure transducer (12), the 3rd Pneumatic diaphragm valve (11), filtrator (10) and drain valve (9) tail gas efferent duct be sequentially equipped with.
Described Pneumatic diaphragm valve (5,11), pressure transducer (6,12), tensimeter (7,13), flowmeter (3) or thermometer (8,14) are connected with PLC electric-control system each via wire respectively.
Rotary drier drum steam system leak detection method, it is as follows that use above-mentioned detection device carries out determining step:
1), on the steam input pipe of cut-tobacco drier barrel vapour system, then one group of pressurized air intake line is separately installed, and configures corresponding first Pneumatic diaphragm valve (2) and flowmeter (3), allow the pressure in compressed air system should keep >=0.4MPa;
2) the first hand valve (1), on manual unlocking pressurized air intake line;
3) the 3rd Pneumatic diaphragm valve (11) on the second Pneumatic diaphragm valve (5), on steam off input pipe and tail gas output pipe;
4), the first Pneumatic diaphragm valve (2) opened on pressurized air intake line, the opening time t of PLC electric-control system record first Pneumatic diaphragm valve (2)
1, and the flow signal detected by flowmeter 3 compared with PLC electric-control system preset value after, automatically regulated the open amount of the first Pneumatic diaphragm valve (2) by PLC electric-control system; The compressed air pressure detected when the first pressure transducer (6) reaches setting value P
1time (0.4Mpa or other), close the first Pneumatic diaphragm valve (2), record the time t that the first Pneumatic diaphragm valve (2) is closed simultaneously
2; Through the dwell time t of setting
3after, again by the compressed air pressure P of the first pressure transducer (6) detection system
2;
Now, can obtain: system t=t pressure rising time
2-t
1
System pressure difference P=P
2-P
1
5), whether cut-tobacco drier barrel vapour system exists the decision method of leakage:
I: when compared with the former memory numerical value of PLC electric-control system, system t pressure rising time is obviously elongated, illustrate that cut-tobacco drier barrel vapour system exists and leak;
II: when P≤0, illustrate that cut-tobacco drier barrel vapour system exists and leak;
6), when determine cut-tobacco drier vapour system occur leak after, can input again there is certain color pressure gas (as CO
2) in jet chimney and barrel, finding leakage point fast by artificially observing the gas leakage position with certain color, being convenient to rapid-maintenance.
Principle of work: the space entered steam pipework, dry silk barrel intraformational bed and the formation of row's steam pipework utilizing Rotary drier drum steam system, airtight feature when closing turnover steam valve, under airtight condition, introduce a road pressurized air pressurization is carried out and pressurize certain hour to cylinder interlayer, by the automatic or manual system pressure difference judged before and after pressing time, pressurize, judge whether this confined space leaks, thus reach the object whether vapour system detecting cut-tobacco drier cylinder before manufacture leakage occurs.
Advantage of the present invention is:
(1) only need increasing by one group of compressed-air actuated intake line at the jet chimney of existing Rotary drier, without the need to carrying out larger transformation to existing equipment and pipeline, not changing equipment original structure, install simple, cost of investment is little, is easy to realize;
(2) judge whether the vapour system pipeline of cut-tobacco drier leaks by manually carrying out detecting before can starting shooting every day as required; Or after the PLC of cut-tobacco drier electric-control system being carried out to programming improvement, automatically carry out detection judgement by electric-control system, when occurring automatically to report to the police when leaking;
(3) pick-up unit time of utilizing pressurized air to input or pressure, detect before cut-tobacco drier is formally produced, if find that leakage can place under repair in time, compare production run and find to place under repair when leaking disposal, effectively shorten and find to leak and time of process, effectively can also stop the quality accident that causes due to steam leakage and property loss.
(4) Rotary drier on tobacco industrial enterprise primary processing line is specially adapted to, or the equipment of the opposing seal similar to Rotary drier drum steam system architecture.
Accompanying drawing explanation
Fig. 1 is the present invention when adopting Non-follow control, Rotary drier drum steam system each pipeline annexation structural representation.
Fig. 2 is the present invention when adopting PLC electric-control system, the schematic diagram of PLC electric-control system and each pipeline annexation of Rotary drier drum steam system.
Each label in figure: the 1-the first hand valve; 4-the second hand valve; 2-the first Pneumatic diaphragm valve, the 5-the second Pneumatic diaphragm valve; 11-the three Pneumatic diaphragm valve; 3-flowmeter; 6-the first pressure transducer, the 12-the second pressure transducer; 7-the first tensimeter, the 13-the second tensimeter; 8-the first thermometer, the 14-the second thermometer; 9-drain valve; 10-filtrator; 15-dry silk drum outer wall; 16-dry silk cylinder inwall.
embodiment:
Whether pick-up unit of the present invention can adopt manual mode, also can adopt the automatically controlled pattern of PLC, carries out Leak Detection every day at cut-tobacco drier before production to steam pipework and barrel, can predict the Rotary drier drum steam system intending detecting in advance and leak.
The present invention need on the inlet duct that Rotary drier vapour system enters baking silk barrel, increase by a road pressurized air input media again, and part improvement is carried out to cut-tobacco drier control system, by the automatically controlled write trace routine of PLC and dicision rules, Pneumatic diaphragm valve is controlled (as shown in schematic diagram 1,2).
Before every day, cut-tobacco drier started to produce, manual mode opens the first hand valve 1 and the first hand valve 3, with the second Pneumatic diaphragm valve 5 and the 3rd Pneumatic diaphragm valve 11 of the automatic steam off system entry of PLC control system and endpiece, and automatically open the first Pneumatic diaphragm valve 2, the pressurized air of certain flow and pressure is made to be input to jet chimney and the inner wall of rotary drum cavity of cut-tobacco drier, after reaching set pressure, close the first Pneumatic diaphragm valve 2 and keep 30 ~ 60s, cut-tobacco drier control system is exerted pressure the time by the situation of change automatically calculating being arranged on pressure in the first pressure transducer 6 on steam pipework and the second pressure transducer 12 automatic checkout system in the process.After dwell time arrival setting value, control system is by automatically calculating compressed-air actuated exerting pressure the time, and the interior setting of the change value of pressure before and after pressurize and system is compared and automatically judged whether the vapour system of cut-tobacco drier cylinder leaks.Operating personnel are also arranged on the system pressure situation of change of the first tensimeter 7 on steam pipework and the display of the second tensimeter 13 by manual observation, accurately judge whether the vapour system of cut-tobacco drier there occurs leakage.
Operation steps of the present invention is as follows:
1, on the steam input pipe of cut-tobacco drier barrel vapour system, the another pipeline installing one group of pressurized air input, and configure corresponding first Pneumatic diaphragm valve 2 and flowmeter 3, compressed air system pressure should keep >=0.4MPa.
2, the first hand valve 1 on manual unlocking compressed air line.
3, the second upper Pneumatic diaphragm valve 5 in steam off system input, output pipe and the 3rd Pneumatic diaphragm valve 11.
4, the opening time t of the first Pneumatic diaphragm valve 2, PLC electric-control system record first Pneumatic diaphragm valve 2 is opened
1, and the flow signal detected by flowmeter 3 compared with PLC electric-control system preset value after, automatically regulated the open amount of the first Pneumatic diaphragm valve 2 by PLC electric-control system; The compressed air pressure detected when the first pressure transducer 6 reaches setting value P
1time (0.4Mpa or other), close the time t that the first Pneumatic diaphragm valve 2 records the first Pneumatic diaphragm valve 2 closedown simultaneously
2; Through the dwell time t of setting
3after, again by the compressed air pressure P of the first pressure transducer 6 detection system
2.Now, can obtain
System t=t pressure rising time
2-t
1
System pressure difference P=P
2-P
1
5, whether cut-tobacco drier barrel vapour system exists the decision method of leakage:
i, remember numerical value with PLC electric-control system compared with, system t pressure rising time is obviously elongated, illustrates that cut-tobacco drier barrel vapour system exists and leaks;
II, when P≤0, illustrate that cut-tobacco drier barrel vapour system exists and leak;
6, when determining that the vapour system of cut-tobacco drier occurs to leak, the gas with certain color can be used (as CO
2) be input in jet chimney and barrel, release place by observation colored gas and carry out fast searching to leakage point, to keep in repair fast.
The present invention includes and may adopt the range of application of this version and know-why to be: Cigarette Industrial Enterprise primary processing line adopts the dry link of the cut tobacco of Rotary drier.Also comprise with detection method described in the invention, according to principle make pick-up unit, practical operation method and Cleaning Principle.
Claims (3)
1. a Rotary drier drum steam system leak detection method, is characterized in that detecting determining step as follows:
1), on the steam input pipe of cut-tobacco drier barrel vapour system, then one group of pressurized air intake line is separately installed, and configures corresponding first Pneumatic diaphragm valve (2) and flowmeter (3), allow the pressure in compressed air system should keep >=0.4MPa;
2) the first hand valve (1), on manual unlocking pressurized air intake line;
3) the 3rd Pneumatic diaphragm valve (11) on the second Pneumatic diaphragm valve (5), on steam off input pipe and tail gas output pipe;
4), the first Pneumatic diaphragm valve (2) opened on pressurized air intake line, the opening time t of PLC electric-control system record first Pneumatic diaphragm valve (2)
1, and the flow signal detected by flowmeter (3) compared with PLC electric-control system preset value after, automatically regulated the open amount of the first Pneumatic diaphragm valve (2) by PLC electric-control system; The compressed air pressure detected when the first pressure transducer (6) reaches setting value P
1, close the first Pneumatic diaphragm valve (2), record the time t that the first Pneumatic diaphragm valve (2) is closed simultaneously
2; Through the dwell time t of setting
3after, again by the compressed air pressure P of the first pressure transducer (6) detection system
2;
Now, can obtain: system t=t pressure rising time
2-t
1
System pressure difference P=P
2-P
1
5), whether cut-tobacco drier barrel vapour system exists the decision method of leakage:
I: when compared with the former memory numerical value of PLC electric-control system, system t pressure rising time is obviously elongated, illustrate that cut-tobacco drier barrel vapour system exists and leak, PLC electric-control system can display alarm signal;
II: when P≤0, illustrate that cut-tobacco drier barrel vapour system exists and leak, PLC electric-control system can display alarm signal;
6), after determining that leaking appears in cut-tobacco drier vapour system, can input again there is certain color pressure gas in jet chimney and barrel, find leakage point fast by the gas leakage position that artificially observation has certain color, be convenient to rapid-maintenance.
2. the Rotary drier drum steam system leak pick-up unit that claim 1 detection method is special, Rotary drier is primarily of cylinder, hot air circulating system and vapour system composition, wherein, cylinder is a Double-layer seal type structure be jointly made up of inwall and outer wall, vapour system comprises the steam input pipe connected by one group of ring flange, tail gas efferent duct, valve and steam boiler are formed, it is characterized in that steam input pipe being sequentially equipped with the first thermometer (8), first tensimeter (7), first pressure transducer (6), second Pneumatic diaphragm valve (5) and the second hand valve (4),
Between first pressure transducer (6) and the second Pneumatic diaphragm valve (5) of steam input pipe, pipeline is connected with one group of pressurized air input channel, this pressurized air input channel is made up of the flowmeter sequentially connected (3), the first Pneumatic diaphragm valve (2) and the first hand valve (1), the import of pressurized air input channel directly and pressurized air input system mutually connect
The second thermometer (14), the second tensimeter (13), the second pressure transducer (12), the 3rd Pneumatic diaphragm valve (11), filtrator (10) and drain valve (9) tail gas efferent duct be sequentially equipped with.
3. pick-up unit according to claim 2, is characterized in that described the first Pneumatic diaphragm valve (5), the second Pneumatic diaphragm valve (11), the first pressure transducer (6), the second pressure transducer (12), the first tensimeter (7), the second tensimeter (13), flowmeter (3) or the first thermometer (8), the second thermometer (14) is connected with PLC electric-control system each via wire respectively.
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| CN105146725B (en) * | 2015-10-30 | 2017-03-22 | 中国烟草总公司郑州烟草研究院 | Method for detecting air leakage rate of interior of roller in roller processing course for tobaccos to be produced into shreds |
| CN107781648A (en) * | 2016-08-24 | 2018-03-09 | 台海玛努尔核原（上海）能源设备有限公司 | The leak detection system and jet chimney of jet chimney |
| CN109596259A (en) * | 2018-12-10 | 2019-04-09 | 中国航发四川燃气涡轮研究院 | A kind of device checking aero-engine pressure test pipe |
| CN112179581A (en) * | 2020-09-22 | 2021-01-05 | 杭州东生生物技术有限公司 | Glove integrity detection method, equipment and system and readable storage medium |
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| CN2701270Y (en) * | 2003-01-12 | 2005-05-25 | 王兴茂 | Steam pipe controlling device of hot air type tobacco leaf moisting machine |
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|---|---|---|---|---|
| JP2832981B2 (en) * | 1989-02-06 | 1998-12-09 | スズキ株式会社 | Seal device for oil passage test |
| JPH0961282A (en) * | 1995-08-30 | 1997-03-07 | Showa Alum Corp | Air leak detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2701270Y (en) * | 2003-01-12 | 2005-05-25 | 王兴茂 | Steam pipe controlling device of hot air type tobacco leaf moisting machine |
| CN2893593Y (en) * | 2006-04-25 | 2007-04-25 | 将军烟草集团有限公司 | Cut-tobacco drier heating steam pipeline |
| CN201683017U (en) * | 2010-03-30 | 2010-12-29 | 长沙赛普尔自动化工程设备有限公司 | Silk drying machine steaming and spraying device and silk drying machine |
| CN203037430U (en) * | 2013-01-16 | 2013-07-03 | 红塔烟草(集团)有限责任公司 | Thin plate type cut tobacco drier cylinder wall steam system leakage detection device |
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