CN109855806A - A kind of method of calibration of safety valve sealing performance - Google Patents
A kind of method of calibration of safety valve sealing performance Download PDFInfo
- Publication number
- CN109855806A CN109855806A CN201910118491.2A CN201910118491A CN109855806A CN 109855806 A CN109855806 A CN 109855806A CN 201910118491 A CN201910118491 A CN 201910118491A CN 109855806 A CN109855806 A CN 109855806A
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- pressure
- safety valve
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- calibration
- sealing performance
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Abstract
The invention discloses a kind of methods of calibration of safety valve sealing performance, first with visual and audition, observe the sealing situation of safety valve, the import of safety valve is connect with gas leakage fairlead, and the other end of gas leakage fairlead is protruded into sink, safety valve inlet pressure is increased, after pressure value reaches the 90% of set-pressure, continuation is pressurized with 0.01Mpa/S, record set-pressure, then reduce the inlet pressure of safety valve, safety valve is set to return to sealing state, outlet is blocked using blind flange, the inlet pressure of safety valve is adjusted to sealed pressure later, and continue to keep sealed pressure 5 or 10 minutes, the observation slip that leakage number of bubbles indicates per minute, the number of bubbles of dosing leak is calculated since first bubble occurring, take the average value in two minutes, note is observed in 3 minutes of beginning simultaneously The pressure changing of the pressure gauge of safety valve entrance is recorded, pressure then shows No leakage without reduction.
Description
Technical field
The present invention relates to safety valve detection technique fields, more particularly to a kind of method of calibration of safety valve sealing performance.
Background technique
Recently as the fast development of national economy, the demand of petroleum, industrial chemicals is increased considerably, petroleum
Work industry is grown rapidly, and process units scale is increasing, and working depth is constantly deepened.Petrochemical industry is passed through in its people
It plays an important role in Ji, is one of mainstay industry of China's economic development.Safety valve is a kind of automatic valve,
The fluid of a load quantity is not discharged, using the power of medium itself by any external force to prevent the over proof peace of pressure
Total head.After pressure recovery is normal, valve again close and medium prevented to continue to flow out by row.Safety valve, the peace as special equipment
Full attachment is to ensure that petroleum chemical enterprise's pressure vessel and pressure pipeline safety, prevents the last resort of major accident.Petrochemical industry dress
Set safety valve and be normally operated in high temperature, on high-tension apparatus, mostly toxic, harmful, inflammable, the explosive substance of medium, operating pressure,
Under the physics such as temperature, medium cleanliness and surrounding medium corrosion, chemical factor effect, safe valve performance especially set-pressure
Can change with sealing performance, will lead to safety valve cannot by authorized pressure open or return seat, cause production safety hidden danger and
Pollute environment.Therefore, inspection especially to safety valve sealing performance great for the research significance of the method for inspection of the valve of safety
Proved recipe method.
The verifying attachment of safety valve at this stage is introduced from foreign countries, results in inspection cost high in this way, verifying attachment
Maintenance also need to return external maintenance, lead to the needs being in case of emergency unable to meet production, practicability is poor, and back and forth
Transport easily sealing surface is damaged, in addition external structure of the detecting device is complicated.
Summary of the invention
The purpose of the present invention is overcome prior art defect to provide a kind of accurate, simple and effective, high reliablity safety valve
Sealing performance method of calibration.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of verification side of safety valve sealing performance
Method observes the sealing situation of safety valve first with visual and audition, and the import of safety valve is connect with gas leakage fairlead, and
The other end of gas leakage fairlead is protruded into sink, safety valve inlet pressure is increased, when pressure value reaches set-pressure
After 90%, continuation is pressurized with 0.01Mpa/S, records set-pressure, then reduces the inlet pressure of safety valve, returns safety valve
To sealing state, outlet is blocked using blind flange, the inlet pressure of safety valve is adjusted to sealed pressure later, and continue to protect
Sealed pressure 5 or 10 minutes are held, observe the slip that leakage number of bubbles indicates per minute, the number of bubbles of dosing leak is from first
Bubble occurs starting to calculate, and takes the average value in two minutes, while observing and recording safety valve entrance in 3 minutes of beginning
The pressure changing of pressure gauge, pressure then show No leakage without reduction.
Preferably, the set-pressure is opening pressure of safety valve, when adjusting set-pressure, in the work that spring limits
In pressure limit, spring pre-tightening decrement is changed by the adjustment screw of spin safe valve, set-pressure is adjusted.
Preferably, the gas leakage fairlead is put at the 12mm-13mm of the sink water surface.
It preferably, is inflammable and explosive, poisonous and hazardous safety valve for working media, it is desirable that within the defined dwell time
Slip is zero.
Preferably, safety valve air inlet sealed pressure pressure maintaining 5 is required to divide as the valve of safety valve inside nominal diameter≤80mm
Clock requires the pressure maintaining of safety valve air inlet sealed pressure 10 minutes as the valve inside nominal diameter DN > 80mm of safety valve.
After using the above structure, the present invention has the advantage that simple and convenient, detection is accurate, while utilizing external observation,
Bubble observation and the variation reduced to the pressure value of safety valve inlet pressure are monitored the leakproofness of safety valve, more quasi-
Really.
Specific embodiment
The present invention in the specific implementation, see first with visual and audition by a kind of method of calibration of safety valve sealing performance
The import of safety valve connect with gas leakage fairlead, and the other end of gas leakage fairlead is protruded by the sealing situation for examining safety valve
In sink, safety valve inlet pressure is increased, after pressure value reaches the 90% of set-pressure, continuation is pressurized with 0.01Mpa/S,
Set-pressure is recorded, then reduces the inlet pressure of safety valve, safety valve is made to return to sealing state, will be exported using blind flange
It blocks, the inlet pressure of safety valve is adjusted to sealed pressure later, and continue to keep sealed pressure 5 or 10 minutes, observation is every
The slip that minute leakage number of bubbles indicates, the number of bubbles of dosing leak are calculated since first bubble occurring, are taken two minutes
Interior average value, while observing and recording in 3 minutes of beginning the pressure changing of the pressure gauge of safety valve entrance, pressure
Then show No leakage without reducing.
The set-pressure is opening pressure of safety valve, when adjusting set-pressure, in the operating pressure model that spring limits
In enclosing, spring pre-tightening decrement is changed by the adjustment screw of spin safe valve, set-pressure is adjusted.
The gas leakage fairlead is put at the 12mm-13mm of the sink water surface.
It is inflammable and explosive, poisonous and hazardous safety valve for working media, it is desirable that in defined dwell time internal leakage rate
It is zero.
It is required the pressure maintaining of safety valve air inlet sealed pressure 5 minutes as the valve of safety valve inside nominal diameter≤80mm, works as peace
It is required the pressure maintaining of safety valve air inlet sealed pressure 10 minutes when the valve inside nominal diameter DN > 80mm of full valve.
The present invention and its embodiments have been described above, this description is no restricted, only reality of the invention
Apply one of mode.All in all if those of ordinary skill in the art are inspired by it, the invention objective is not being departed from
In the case of, frame mode similar with the technical solution and embodiment are not inventively designed, should belong to of the invention
Protection scope.
Claims (5)
- It, will 1. a kind of method of calibration of safety valve sealing performance observes the sealing situation of safety valve first with visual and audition The import of safety valve is connect with gas leakage fairlead, and the other end of gas leakage fairlead is protruded into sink, by safety valve inlet-pressure Power increases, and after pressure value reaches the 90% of set-pressure, continuation is pressurized with 0.01Mpa/S, records set-pressure, then reduces The inlet pressure of safety valve, make safety valve return to sealing state, is blocked outlet using blind flange, later by safety valve into Mouth pressure is adjusted to sealed pressure, and continues to keep sealed pressure 5 or 10 minutes, observes letting out for leakage number of bubbles expression per minute The number of bubbles of leak rate, dosing leak is calculated since first bubble occurring, takes the average value in two minutes, while in beginning The pressure changing of the pressure gauge of safety valve entrance is observed and recorded in 3 minutes, pressure then shows No leakage without reduction.
- 2. a kind of method of calibration of safety valve sealing performance according to claim 1, it is characterised in that: the set-pressure In the working pressure range that spring limits, pass through spin safe valve when adjusting set-pressure for opening pressure of safety valve It adjusts screw and changes spring pre-tightening decrement, set-pressure is adjusted.
- 3. a kind of method of calibration of safety valve sealing performance according to claim 1, it is characterised in that: the gas leakage is drawn Pipe is put at the 12mm-13mm of the sink water surface.
- 4. a kind of method of calibration of safety valve sealing performance according to claim 1, it is characterised in that: for working media For inflammable and explosive, poisonous and hazardous safety valve, it is desirable that in defined dwell time internal leakage rate be zero.
- 5. a kind of method of calibration of safety valve sealing performance according to claim 1, it is characterised in that: when the valve of safety valve It is required the pressure maintaining of safety valve air inlet sealed pressure 5 minutes when door inside nominal diameter≤80mm, as the valve inside nominal diameter DN of safety valve It is required the pressure maintaining of safety valve air inlet sealed pressure 10 minutes when > 80mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118491.2A CN109855806A (en) | 2019-02-16 | 2019-02-16 | A kind of method of calibration of safety valve sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118491.2A CN109855806A (en) | 2019-02-16 | 2019-02-16 | A kind of method of calibration of safety valve sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109855806A true CN109855806A (en) | 2019-06-07 |
Family
ID=66898058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910118491.2A Pending CN109855806A (en) | 2019-02-16 | 2019-02-16 | A kind of method of calibration of safety valve sealing performance |
Country Status (1)
| Country | Link |
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| CN (1) | CN109855806A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1101493A (en) * | 1965-02-23 | 1968-01-31 | Midwesco Enterprise Inc | Conduit system comprising a conduit section and method of detecting leaks in a conduit section |
| CN101403657A (en) * | 2008-11-07 | 2009-04-08 | 南京市锅炉压力容器检验研究院 | Calibration apparatus and method for ultra-high pressure safety valve |
| CN201707183U (en) * | 2009-12-31 | 2011-01-12 | 熊辉 | Full automatic precise tester for secondary battery safety valves |
| CN202066647U (en) * | 2011-03-15 | 2011-12-07 | 大连市锅炉压力容器检验研究院 | Safety valve seal detector |
| CN202903461U (en) * | 2012-09-26 | 2013-04-24 | 南京市锅炉压力容器检验研究院 | Low-redundancy high-reliability intelligent checking device for safety valve |
| CN203643142U (en) * | 2013-11-18 | 2014-06-11 | 徐权 | A safety valve checking platform |
| CN205745489U (en) * | 2016-06-30 | 2016-11-30 | 江苏省特种设备安全监督检验研究院南通分院 | Relief valve and the on-line measuring device of relief valve |
-
2019
- 2019-02-16 CN CN201910118491.2A patent/CN109855806A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1101493A (en) * | 1965-02-23 | 1968-01-31 | Midwesco Enterprise Inc | Conduit system comprising a conduit section and method of detecting leaks in a conduit section |
| CN101403657A (en) * | 2008-11-07 | 2009-04-08 | 南京市锅炉压力容器检验研究院 | Calibration apparatus and method for ultra-high pressure safety valve |
| CN201707183U (en) * | 2009-12-31 | 2011-01-12 | 熊辉 | Full automatic precise tester for secondary battery safety valves |
| CN202066647U (en) * | 2011-03-15 | 2011-12-07 | 大连市锅炉压力容器检验研究院 | Safety valve seal detector |
| CN202903461U (en) * | 2012-09-26 | 2013-04-24 | 南京市锅炉压力容器检验研究院 | Low-redundancy high-reliability intelligent checking device for safety valve |
| CN203643142U (en) * | 2013-11-18 | 2014-06-11 | 徐权 | A safety valve checking platform |
| CN205745489U (en) * | 2016-06-30 | 2016-11-30 | 江苏省特种设备安全监督检验研究院南通分院 | Relief valve and the on-line measuring device of relief valve |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190607 |