CN104502040B - Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation - Google Patents
Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation Download PDFInfo
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- CN104502040B CN104502040B CN201410844264.5A CN201410844264A CN104502040B CN 104502040 B CN104502040 B CN 104502040B CN 201410844264 A CN201410844264 A CN 201410844264A CN 104502040 B CN104502040 B CN 104502040B
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Abstract
The invention discloses a pressure maintaining and leakage testing method of purification changeover valves for oxygen generation. After an air separation unit is stopped, a whole system stops working; follow-up pressure maintaining and leakage testing are performed under the condition that valve switches are controlled manually; the pressure of an air compressor is 0.45mpa; pressure measuring instruments PI-1201 and PI-1202 are observed to judge whether the valves leak or not ; the pressure of the air compressor still exists; according to opening and closing conditions of the valves, whether the valves leak or not is detected through pressure changes caused by flowing of air in pipelines. The pressure maintaining and leakage testing method has the advantages that maintenance is achieved without valve demounting, the defects that shutdown is needed for demounting of the valves and equipment is needed for detection in the prior art are avoided, normal operation of an oxygenator can be guaranteed effectively, shutdown time is reduced, production of steel mills is not affected, and hoisting for valve demounting is reduced.
Description
Technical field
The present invention relates to oxygenerating valve door service technique field, and in particular to a kind of oxygen purification switching valve pressurize leak test side processed
Method.
Background technology
20,000 sieve purification system of Lian Zha factories oxygen operation area, is to start for 2008, by the limited public affairs of Henan Katyuan space division
Department establishes.Because sieve purification system valve working environment is more severe, during normal production, gas is 8 by the temperature of valve
15 DEG C, during regenerating molecular sieve, gas temperature is 190 200 DEG C, and during molecular sieve cold blowing, temperature is minimum -15 DEG C, the ring of its work
Summary is disliked more in border.Easily there is fatigue now in working at high/low temp. condition, valve interior sealing, filler, packing ring etc. for a long time in this batch of valve
As clamping stagnation, action be dumb, internal leakage to cause valve to occur in running often, and when serious, gases at high pressure leak into low pressure
End, causes molecular sieve in-line relief valve take-off, the serious problems such as air separation unit can not be produced.
Sieve purification system is one of important step of supporting oxygen air separation unit operation processed, and Main Function is to remove air
In moisture, carbon dioxide, the Hydrocarbon such as acetylene, be that air separation unit conveys pure, qualified compressed air, be space division
Device oxygen nitrogen and argon is separated and is laid the foundation.Sieve purification system has 14 valves, and by set program, time switch comes real
An existing job, a regeneration, the mode of switching in parallel ensure that air separation unit continuously runs without interruption.Purification system valve
Run to some cycles, need pressurize leak test, conventional way be 14 valves are removed after, using the carrying out of equipment valve one by one
Check, overhaul, oxygen processed certainly will will be caused to stop production, need substantial amounts of cost of labor, and whole steel mill to stop production, loss is inestimable；
Simultaneously dismantling valve wastes time and energy, and increases the workload of workman, and other equipment in need increased equipment being detected
Cost, by online pressurize, leak test, can effective guarantee oxygenerator normal operation, both reduced downtime, do not delayed steel
Factory produces, while also reducing the lifting work of dismounting valve.To the valve for leakage occur, can carry out in company's normal service
Process.
The online pressure testing of the present invention, leak test scheme, can accurately detect which deck valve door breaks down, and glitch can be located online
Reason, major break down can be guarded operation, be processed when waiting company organization's overhaul again.Reduce nonscheduled down time, effective guarantee
The normal production of oxygenerator, reaches the purpose of continuous uninterrupted production.
The content of the invention
Problem to be solved by this invention is to provide a kind of oxygen purification switching valve pressurize leak testing process processed, accurately can detect
Which deck valve door breaks down, glitch can online treatment, major break down can guard operation, by online pressurize, leak test, effectively can protect
The normal operation of barrier oxygenerator, had both reduced downtime, did not delay steel mill's production, while also reducing the slinger of dismounting valve
Make.
A kind of oxygen purification switching valve pressurize leak testing process processed, comprises the following steps：
1）After air separation unit is shut down, air compressor machine does not stop, and all valves are fully closed, keeps air compressor machine pressure to be 0.45mpa, right
The observation of PI-1201 and PI-1202 pressure instrumentations judges whether valve leaks；
2）Fractional distillation pressure tower is kept to be 0.1 0.2mpa, whether 1, No. 2 molecular sieve pressures of observation go up, the time is
20min, if 1, No. 2 molecular sieve pressures do not go up, v1201 valves, v1202 valves are not revealed, if on No. 1 molecular sieve pressure
Rise, then v1201 valve leaks, if No. 2 molecular sieve pressures go up, v1202 valve leaks；
3）The v1201 valves of No. 1 molecular sieve are opened, whether No. 2 molecular sieve pressures of observation go up, the v1209 valves if going up
Door leakage；
4）After No. 1 molecular sieve pressure is stable, v1204 valves are opened, the v1203 valves if No. 2 molecular sieve pressures go up
Leakage, after judgement is finished, closes v1204 valves；
5）After v1204 valve closings, v1206 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, and by cloth be placed on dismounting point see whether swing, if not swinging, v1205 valves
Door is not revealed, if swinging, v1205 valve leaks, after judgement is finished, closes v1206 valves；
6）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1207 valves, v1210 valves are not revealed, v1207 valves, v1210 valve leaks if swinging；
7）The v1202 valves of No. 2 molecular sieves are opened, after No. 2 molecular sieve pressures are stable, v1203 valves is opened, if No. 1
Molecular sieve pressure goes up then v1204 valve leaks, after judgement is finished, closes v1203 valves；
8）After v1203 valve closings, v1205 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, and by cloth be placed on dismounting point see whether swing, if not swinging, v1206 valves
Door is not revealed, if swinging, v1206 valve leaks, after judgement is finished, closes v1205 valves；
9）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1208 valves, v1211 valves are not revealed, v1208 valves, v1211 valve leaks if swinging.
Further, when leakage is determined whether using cloth, cloth is tied up and is detected in bamboo pole front end.
Further, when certain valve leak is detected, the valve is keeped in repair or is changed, then carried out next
The pressurize leak test work of step.
Further, any one point peace in tri- electrical heating points for measuring temperature of TIAS1223, TIAS1224, TIAS1225
Dress PI-1203 pressure instrumentations, for v1205 valves and v1206 valves whether Leak Detection when, PI-1203 measuring cells can be passed through
Table replaces cloth to be observed.
The molecular sieve purifier of the system is two groups, horizontal, hydrostatic column, is filled with 13X ∽ in every container
APG, 4x8 mesh, 9700kg adsorbent of molecular sieve.When air passes through mol sieve beds, due to the characterization of adsorption of molecular sieve, by sky
The Hydrocarbon such as H2O, CO2, the C2H2 in gas adsorb, and air is purified, and adsorb through a period of time, proceed to regeneration week
In phase, first reversely regenerated by high temperature drying dirt nitrogen, then be dried dirt nitrogen and be cooled to room temperature, make adsorbent of molecular sieve separate out H2O,
CO2 and Hydrocarbon etc..Molecular sieve after regeneration can put into new absorption work again.Molecular sieve purifier is handed in pairs
For use, during a job, another is in regeneration.
Beneficial effects of the present invention：The present invention need not be removed to each valve just can be examined to the performance of valve
Survey, detect each valve with the presence or absence of leakage by pressurize leak test, it is ensured that production is smoothed out.Shut down in air separation unit
Afterwards, whole system quits work, and follow-up pressurize leak test work is carried out in the case of hand control valve door trip, air compressor machine
Pressure is 0.45mpa, judges whether valve leaks to the observation of PI-1201 and PI-1202 pressure instrumentations, and air compressor machine is remained
Pressure, each valve of pressure detecting that can be brought according to the circulation of gas in pipelines is with the presence or absence of leakage, it is possible to achieve do not remove
Valve is overhauled, it is to avoid original technology need to stop production the deficiency each valve being removed and is detected using equipment it
Place, saves substantial amounts of cost of labor, and more easily pressurize leak testing process is easy to that workman is regular to be carried out to system valve
Maintenance, reduces the probability broken down when equipment runs, improves the benefit of factory.
By cloth in tri- electrical heating points for measuring temperature of purification silencing end or TIAS1223, TIAS1224, TIAS1225
In any one remove point, when valve has leakage, have in pipeline gas flowing, if cloth place after occur swing,
Illustrate to have in pipeline gas to flow, just reflect indirectly the situation that there is valve leak, this method can detect with
Other valves of PI-1201 and PI-1202 pressure instrumentations without directly contact, realize the valve detection to all purification systems.
When being detected using cloth, cloth can be wrapped in bamboo pole or some other stock tops, the hand-held stock of workman
End, the danger of workman when this method reduces pressurize leak test will not be directly blown onto by the gas of pipeline internal leakage, protected
The safety of workman's work is demonstrate,proved.
When pressurize leak test is carried out to valve, if detecting, certain valve occurs in that leakage, just needs to carry out the valve
Maintenance is changed, because follow-up valve pressurize leak test needs to ensure that pent valve is very to close
To existing after the valve revealed is repaired or replaced, phenomenon, only ensures which, not in gas leakage, could be carried out to follow-up valve
Pressurize leak test, it is ensured that the correctness of testing result.
Any one point in tri- electrical heating points for measuring temperature of TIAS1223, TIAS1224, TIAS1225 installs PI-1203
Pressure instrumentation, intuitively can detect by pressure instrumentation that v1205 valves or v1206 valves, with the presence or absence of leakage problem, are exempted from
Go to remove the trouble of electrical heating point for measuring temperature, accelerated the operating rate of pressurize leak test, reduce system downtime, improve
The benefit of factory.
The present invention can accurately detect which deck valve door breaks down, glitch can online treatment, major break down can guard operation,
By online pressurize, leak test, can effective guarantee oxygenerator normal operation, both reduced downtime, do not delayed steel mill's production, together
When also reduce dismounting valve lifting work.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is the system construction drawing of present invention oxygen purification system processed.
Specific embodiment
Fig. 1 shows the annexation figure of this system oxygen purification system purification valve, by the operation to these valves come
Realize the pressurize leak test to each valve.
Embodiment one
The invention provides a kind of oxygen purification switching valve pressurize leak testing process processed, comprises the following steps：
1）After air separation unit is shut down, air compressor machine does not stop, and all valves are fully closed, keeps air compressor machine pressure to be 0.45mpa, right
The observation of PI-1201 and PI-1202 pressure instrumentations judges whether valve leaks, by the adjustment of ensuing valve switch and pressure measurement
The change of instrument, detects to whether valve leaks；
2）Keep fractional distillation pressure tower to be 0.1 0.2mpa, prevent room temperature valve to be not closed completely, cryogenic gas flows backwards, to fractional distillation
Tower causes to damage or cause stopping accident, and whether 1, No. 2 molecular sieve pressures of observation go up, and the time is 20min, if 1, No. 2 molecules
Screen pressing power does not go up, then illustrate that v1201 valves, v1202 valves do not have gas to pass through, and now all valves are to close shape
State, just illustrates that v1201 valves, v1202 valves do not have leakage, if No. 1 molecular sieve pressure goes up, v1201 valve leaks, if
No. 2 molecular sieve pressures go up, then v1202 valve leaks；
3）The v1201 valves of No. 1 molecular sieve are opened, whether No. 2 molecular sieve pressures of observation go up, the v1209 valves if going up
Door leakage, No. 1 molecular sieve and No. 2 molecular sieves are linked together by v1209 valves, when v1201 valves are opened to No. 1 molecule
Sieve carries out pressurising, if if v1209 valves do not have leakage, No. 2 molecular sieves are not in the situation of pressure increase, only
There are leakage, No. 1 molecular sieve and No. 2 molecular sieve connections in v1209 valves, the pressure of No. 2 molecular sieves will be with No. 1 molecule screen pressing
The increase of power and increase；
4）After No. 1 molecular sieve pressure is stable, v1204 valves are opened, the v1203 valves if No. 2 molecular sieve pressures go up
Leakage, after judgement is finished, closes v1204 valves, and No. 1 molecular sieve and No. 2 molecular sieves are also by v1203 valves and v1204 valves
Connection, now v1201 valves and v1204 valves are open modes, and No. 1 molecular sieve has pressure, if leakage occur in v1203 valves
If, the pressure of No. 2 molecular sieves also will rise, and whether thus judge the leakage of v1203 valves；
5）After v1204 valve closings, v1206 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, and by cloth be placed on dismounting point see whether swing, if not swinging, v1205 valves
Door is not revealed, if swinging, v1205 valve leaks, after judgement is finished, closes v1206 valves, No. 1 molecular sieve, v1205 valves
A path is formed with tri- electrical heating points for measuring temperature of TIAS1223, TIAS1224, TIAS1225, No. 1 molecular sieve is deposited
In the case of pressure, if three thermometric point pressures go up, v1205 valves are in off position, so that it may illustrate v1205 valves
There is leakage；
6）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1207 valves, v1210 valves are not revealed, v1207 valves, v1210 valve leaks if swinging, v1201 valves, v1207
Valve and purification silencing end form a path, and v1201 valves, v1210 valves and purification silencing end form one
Path, now v1201 valves open, there is pressure in air compressor machine, and v1207 valves and v1210 valves are closed modes, cloth pendulum
It is dynamic to illustrate in pipeline, there is pressure, if one that exists in pipeline that pressure turned out in v1207 valves and v1210 valves or
There is leakage situation in person two；
7）The v1202 valves of No. 2 molecular sieves are opened, after No. 2 molecular sieve pressures are stable, v1203 valves is opened, if No. 1
Molecular sieve pressure goes up then v1204 valve leaks, after judgement is finished, closes v1203 valves, and principle is same as described above；
8）After v1203 valve closings, v1205 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, and by cloth be placed on dismounting point see whether swing, if not swinging, v1206 valves
Door is not revealed, if swinging, v1206 valve leaks, after judgement is finished, closes v1205 valves, and principle is same as described above；
9）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1208 valves, v1211 valves are not revealed, and v1208 valves, v1211 valve leaks if swinging, principle are same as described above.
When detection, certain valve occurs in that leakage, just needs the valve is keeped in repair or changed, because follow-up valve
Door pressurize leak test needs to ensure that pent valve is very to close, only to there is the valve revealed
Ensure after repairing or replacing which, not in gas leakage, could carry out pressurize leak test to follow-up valve, it is ensured that testing result is just
True property.
Embodiment two
Present invention also offers a kind of oxygen purification switching valve pressurize leak testing process processed, comprises the following steps：
1）After air separation unit is shut down, air compressor machine does not stop, and all valves are fully closed, keeps air compressor machine pressure to be 0.45mpa, right
The observation of PI-1201 and PI-1202 pressure instrumentations judges whether valve leaks；
2）Fractional distillation pressure tower is kept to be 0.1 0.2mpa, whether 1, No. 2 molecular sieve pressures of observation go up, the time is
20min, if 1, No. 2 molecular sieve pressures do not go up, v1201 valves, v1202 valves are not revealed, if on No. 1 molecular sieve pressure
Rise, then v1201 valve leaks, if No. 2 molecular sieve pressures go up, v1202 valve leaks；
3）The v1201 valves of No. 1 molecular sieve are opened, whether No. 2 molecular sieve pressures of observation go up, the v1209 valves if going up
Door leakage；
4）After No. 1 molecular sieve pressure is stable, v1204 valves are opened, the v1203 valves if No. 2 molecular sieve pressures go up
Leakage, after judgement is finished, closes v1204 valves；
5）After v1204 valve closings, v1206 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, cloth is tied up on bamboo pole top, and cloth is placed on dismounting by the hand-held bamboo pole end of workman
Point sees whether to swing, if not swinging, v1205 valves are not revealed, if swinging, v1205 valve leaks, after judgement is finished,
Close v1206 valves；
6）Cloth is tied up on bamboo pole top, cloth is placed on purification silencing end by the hand-held bamboo pole end of workman, observed
Whether the cloth of purification silencing end swings, and if not swinging, v1207 valves, v1210 valves are not revealed, if swinging
V1207 valves, v1210 valve leaks；
7）The v1202 valves of No. 2 molecular sieves are opened, after No. 2 molecular sieve pressures are stable, v1203 valves is opened, if No. 1
Molecular sieve pressure goes up then v1204 valve leaks, after judgement is finished, closes v1203 valves；
8）After v1203 valve closings, v1205 valves are opened, now remove TIAS1223, TIAS1224, TIAS1225
One in three electrical heating points for measuring temperature, cloth is tied up on bamboo pole top, and cloth is placed on dismounting by the hand-held bamboo pole end of workman
Point sees whether to swing, if not swinging, v1206 valves are not revealed, if swinging, v1206 valve leaks, after judgement is finished,
Close v1205 valves；
9）Cloth is tied up on bamboo pole top, cloth is placed on purification silencing end by the hand-held bamboo pole end of workman, observed
Whether the cloth of purification silencing end swings, and if not swinging, v1208 valves, v1211 valves are not revealed, if swinging
V1208 valves, v1211 valve leaks.
When detection, certain valve occurs in that leakage, just needs the valve is keeped in repair or changed, because follow-up valve
Door pressurize leak test needs to ensure that pent valve is very to close, only to there is the valve revealed
Ensure after repairing or replacing which, not in gas leakage, could carry out pressurize leak test to follow-up valve, it is ensured that testing result is just
True property.
Embodiment three
Present invention also offers a kind of oxygen purification switching valve pressurize leak testing process processed, comprises the following steps：
1）After air separation unit is shut down, air compressor machine does not stop, and all valves are fully closed, keeps air compressor machine pressure to be 0.45mpa, right
The observation of PI-1201 and PI-1202 pressure instrumentations judges whether valve leaks；
2）Fractional distillation pressure tower is kept to be 0.1 0.2mpa, whether 1, No. 2 molecular sieve pressures of observation go up, the time is
20min, if 1, No. 2 molecular sieve pressures do not go up, v1201 valves, v1202 valves are not revealed, if on No. 1 molecular sieve pressure
Rise, then v1201 valve leaks, if No. 2 molecular sieve pressures go up, v1202 valve leaks；
3）The v1201 valves of No. 1 molecular sieve are opened, whether No. 2 molecular sieve pressures of observation go up, the v1209 valves if going up
Door leakage；
4）After No. 1 molecular sieve pressure is stable, v1204 valves are opened, the v1203 valves if No. 2 molecular sieve pressures go up
Leakage, after judgement is finished, closes v1204 valves；
5）After v1204 valve closings, v1206 valves are opened, it is electric in TIAS1223, TIAS1224, TIAS1225 tri-
Any one point in heating point for measuring temperature installs PI-1203 pressure instrumentations, for whether v1205 valves and v1206 valves leak
During detection, cloth can be replaced to be observed by PI-1203 pressure instrumentations, if PI-1203 pressure instrumentations do not change, v1205
Valve is not revealed, if the change of PI-1203 pressure instrumentations, v1205 valve leaks, after judgement is finished, close v1206 valves；
6）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1207 valves, v1210 valves are not revealed, v1207 valves, v1210 valve leaks if swinging；
7）The v1202 valves of No. 2 molecular sieves are opened, after No. 2 molecular sieve pressures are stable, v1203 valves is opened, if No. 1
Molecular sieve pressure goes up then v1204 valve leaks, after judgement is finished, closes v1203 valves；
8）After v1203 valve closings, v1205 valves are opened, it is electric in TIAS1223, TIAS1224, TIAS1225 tri-
Any one point in heating point for measuring temperature installs PI-1203 pressure instrumentations, for whether v1205 valves and v1206 valves leak
During detection, cloth can be replaced to be observed by PI-1203 pressure instrumentations, if PI-1203 pressure instrumentations do not change, v1206
Valve is not revealed, if the change of PI-1203 pressure instrumentations, v1206 valve leaks, after judgement is finished, close v1205 valves；
9）Cloth is placed on into purification silencing end, whether the cloth for observing purification silencing end swings, if dead beat
Dynamic then v1208 valves, v1211 valves are not revealed, v1208 valves, v1211 valve leaks if swinging.
When detection, certain valve occurs in that leakage, just needs the valve is keeped in repair or changed, because follow-up valve
Door pressurize leak test needs to ensure that pent valve is very to close, only to there is the valve revealed
Ensure after repairing or replacing which, not in gas leakage, could carry out pressurize leak test to follow-up valve, it is ensured that testing result is just
True property.
Claims (4)
1. a kind of oxygen purification switching valve pressurize leak testing process processed, it is characterised in that：Comprise the following steps：
1）After air separation unit is shut down, the air compressor machine of chilldown system does not stop, and all valves are fully closed, and holding air compressor machine pressure is
0.45mpa, to the first pressure instrumentation being arranged on No. 1 molecular sieve（PI-1201）With the second survey being arranged on No. 2 molecular sieves
Pressure instrument（PI-1202）Observation judges whether valve leaks；
2）Fractional distillation pressure tower is kept to be 0.1 0.2mpa, whether No. 1 molecular sieve of observation and No. 2 molecular sieve pressures go up, the time is
20min, if No. 1 molecular sieve and No. 2 molecular sieve pressures do not go up, No. 1 the first valve between molecular sieve and air compressor machine
（v1201）, No. 2 the second valves between molecular sieve and air compressor machine（v1202）Do not reveal, if No. 1 molecular sieve pressure goes up, the
One valve（v1201）Leakage, if No. 2 molecular sieve pressures go up, the second valve（v1202）Leakage；
3）Open the first valve（v1201）, whether No. 2 molecular sieve pressures of observation go up, No. 1 molecular sieve and No. 2 points if going up
The 9th valve arranged between son sieve（v1209）Leakage；
4）After No. 1 molecular sieve pressure is stable, the 4th valve for being sequentially connected setting between No. 1 molecular sieve and No. 2 molecular sieves is opened
Door（v1204）With the 3rd valve（v1203）In the 4th valve（v1204）, the 3rd valve if No. 2 molecular sieve pressures go up
（v1203）Leakage, after judgement is finished, closes the 4th valve（v1204）；
5）Treat the 4th valve（v1204）After closing, to open and the 5th of setting is sequentially connected between No. 1 molecular sieve and No. 2 molecular sieves
Valve（v1205）With the 6th valve（v1206）In the 6th valve（v1206）, the 5th valve（v1205）With the 6th valve
（v1206）Between pipeline and the first electrical heating point for measuring temperature（TIAS1223）, the second electrical heating point for measuring temperature（TIAS1224）, the 3rd
Electrical heating point for measuring temperature（TIAS1225）Three electrical heating point for measuring temperature connections, now remove in three electrical heating points for measuring temperature,
And by cloth be placed on dismounting point see whether swing, if not swinging, the 5th valve（v1205）Do not reveal, if swinging, the
Five valves（v1205）Reveal, after judgement is finished, close the 6th valve（v1206）；
6）Cloth is placed on into purification silencing end, purification deafener passes through the 7th valve respectively（v1207）, the tenth valve
（v1210）Connect with No. 1 molecular sieve, whether the cloth for observing purification silencing end swings, the 7th valve if not swinging
（v1207）, the tenth valve（v1210）Do not reveal, the 7th valve if swinging（v1207）, the tenth valve（v1210）Reveal；
7）Open the second valve（v1202）, after No. 2 molecular sieve pressures are stable, open the 3rd valve（v1203）If, No. 1 molecule
Screen pressing power goes up then the 4th valve（v1204）Leakage, after judgement is finished, closes the 3rd valve（v1203）；
8）Treat the 3rd valve（v1203）After closing, the 5th valve is opened（v1205）, now remove the first electrical heating point for measuring temperature
（TIAS1223）, the second electrical heating point for measuring temperature（TIAS1224）, the 3rd electrical heating point for measuring temperature（TIAS1225）Three electrical heating are surveyed
One in warm spot, and by cloth be placed on dismounting point see whether swing, if not swinging, the 6th valve（v1206）Do not let out
Dew, if swing, the 6th valve（v1206）Reveal, after judgement is finished, close the 5th valve（v1205）；
9）Cloth is placed on into purification silencing end, purification deafener passes through the 8th valve respectively（v1208）, the 11st valve
（v1211）Connect with No. 2 molecular sieves, whether the cloth for observing purification silencing end swings, the 8th valve if not swinging
（v1208）, the 11st valve（v1211）Do not reveal, the 8th valve if swinging（v1208）, the 11st valve（v1211）Let out
Dew.
2. oxygen purification switching valve pressurize leak testing process processed as claimed in claim 1, it is characterised in that：Judged whether using cloth
When having leakage, cloth is tied up and is detected in bamboo pole front end.
3. oxygen purification switching valve pressurize leak testing process processed as claimed in claim 1, it is characterised in that：When detecting certain valve
During leakage, the valve is keeped in repair or changed, then carried out the pressurize leak test work of next step.
4. oxygen purification switching valve pressurize leak testing process processed as claimed in claim 1, it is characterised in that：In the first electrical heating thermometric
Point（TIAS1223）, the second electrical heating point for measuring temperature（TIAS1224）, the 3rd electrical heating point for measuring temperature（TIAS1225）Three electrical heating
Any one point in point for measuring temperature installs the 3rd pressure instrumentation（PI-1203）, for the 5th valve（v1205）With the 6th valve
（v1206）Whether during Leak Detection, the 3rd pressure instrumentation can be passed through（PI-1203）Cloth is replaced to be observed.
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| CN201410844264.5A CN104502040B (en) | 2014-12-31 | 2014-12-31 | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation |
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| CN201410844264.5A CN104502040B (en) | 2014-12-31 | 2014-12-31 | Pressure maintaining and leakage testing method of purification changeover valves for oxygen generation |
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| CN104502040B true CN104502040B (en) | 2017-03-22 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967425A (en) * | 2012-12-12 | 2013-03-13 | 天津渤海化工有限责任公司天津碱厂 | Method for testing leakage of oxygen pipeline switching valves before driving |
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
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| KR100616636B1 (en) * | 2004-07-27 | 2006-08-28 | (주)씨엔에스 | Flow path switching valve for oxygen generator |
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| CN102967425A (en) * | 2012-12-12 | 2013-03-13 | 天津渤海化工有限责任公司天津碱厂 | Method for testing leakage of oxygen pipeline switching valves before driving |
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
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