CN109387342A - Low leakage sealed service check method - Google Patents
Low leakage sealed service check method Download PDFInfo
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- CN109387342A CN109387342A CN201710677441.9A CN201710677441A CN109387342A CN 109387342 A CN109387342 A CN 109387342A CN 201710677441 A CN201710677441 A CN 201710677441A CN 109387342 A CN109387342 A CN 109387342A
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- valve
- low leakage
- service check
- test
- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to a kind of low leakage sealed service check methods, mainly solve the problems, such as that service check can not be sealed to Leak seals parts under working condition in the prior art.The present invention is by using the method for carrying out low Leak seals parts service check under the conditions of Work condition analogue, service check is sealed using low leakage sealed performance inspection device, the low leakage sealed performance inspection device includes that the technical solution for simulating working condition system, seal assembly test station and leak detection system preferably solves the above problem, be can be used in low leakage sealed service check.
Description
Technical field
The present invention relates to a kind of low leakage sealed service check methods.
Background technique
In recent years, with the continuous aggravation of domestic air pollution, volatile organic matter (VOCs) emission control becomes environmental protection
One of major tasks of improvement.Most materials, medium belong to volatile organic compounds in petrochemical enterprise production process,
And the static seals such as numerous valves, flange, pump and dynamic sealing assembly involved in process equipment, meeting can not during production run
Generate a large amount of VOCs leakage discharge with avoiding, causes petrochemical industry to become one of the primary discharge source of atmosphere VOCs.For
Air pollution is administered, " planning of national environmental protection " 12th Five-Year Plan " " clearly proposes: " reinforcing petrochemical industry production, conveying and storage
Process volatile organic contaminant emission control ".Petrochemical enterprise is to reduce environmental pollution, reduce refining losses, also
Continue to increase the emission control to VOCs.According to statistics, apparatus assembly leakage (i.e. uncontrollable discharge) Zhan Shihua VOCs is discharged about
70%, it is VOCs primary discharge source, solving apparatus assembly leakage becomes the most important thing of petrochemical industry control VOCs discharge.
And in the reason of causing apparatus assembly to leak, remove the originals such as seal assembly maintenance not in place, manual operation or Rig up error
Because outer, the failure of equipment sealing material and wherein most important reason are mainly manifested in sealing materials type selecting such as gasket, filler etc.
Grade not enough, be not up to expected by performance.Therefore, the performance verification of equipment seal assembly, it is ensured that seal assembly all technical reaches
It is to realize that the source of apparatus assembly zero leakage guarantees to related seals class requirement.
It is directed to the inspection of low Leak seals parts both at home and abroad at present, is mainly carried out under normal temperature and pressure or specific temperature conditions
It examines, lacks working condition lower seal service check means, cannot really reflect leakproofness of the sealing element under working condition
Energy.
Anti- loss seal assembly verifying bench is established, seeks to carry out the equipment seal assembly such as low leakage valve, flange
Performance verification guarantees that the design of petrochemical industry water-tight equipment and type selecting meet the requirements, equipment leakage is reduced from source, realizes to VOCs
" the source control " of discharge.
Summary of the invention
The technical problem to be solved by the present invention is in the prior art can not under working condition to Leak seals parts into
The problem of row sealing performance is examined provides a kind of new low leakage sealed service check method.This method has Work condition analogue, reality
Test the advantage that medium is optional, detection method is various.
To solve the above problems, The technical solution adopted by the invention is as follows: a kind of low leakage sealed service check method, is adopted
Low leakage sealed service check is carried out with the low leakage sealed performance inspection device with Work condition analogue function, the low leakage is close
Sealing property verifying attachment includes simulation working condition system, seal assembly test station and leak detection system, simulation working condition system by
Compressor, head tank, surge tank and heating and cooling system composition, it includes a valve and filler or method that seal assembly, which tests station,
Blue to test station with gasket, leak detection system includes detector, and leak detection system is connected with the test station, compressor
Outlet is connected with heating device entrance, and heating means exit is connected with test station, tests station outlet line after heat exchanger
It is connected respectively with surge tank, suction port of compressor, head tank, test medium pipeline is connected on head tank；Control system and operating condition mould
Quasi- system is connected；
When carrying out low leakage sealed service check, include the following steps:
(1) test medium enters system to testing pressure by pressure reducing valve after surge tank, and by heater by medium temperature
Degree is promoted to test temperature, closes air intake valve, system maintains test pressure by pressure reducing valve, and passes through heater and controlling temp type companion
The torrid zone carries out sealing property of sealing component inspection after maintaining test temperature, experiment condition to reach requirement；
(2) after sealing element test ending, air intake valve is opened, and test medium is dropped by pressure reducing valve after valve and cooler
Pressure, cooling, are emitted into system；
(3) discharge gas can improve raw material pressure inside the tank after entering system, at this moment close pressure surge tank imported valve, open
Gas storage surge tank inlet valve simultaneously opens supercharger by the gas compression of discharge to gas storage surge tank, just to head tank pressure recovery
Gas storage surge tank imported valve, close compressor are closed after constant value, and open pressure surge tank inlet valve；
(4) medium is supplemented in head tank after being depressured by counterbalance valve in gas storage surge tank when normal experiment, and system is first
By gas storage surge tank, into system, make-up gas illustrates to damage due to leakage if raw material pressure inside the tank is reduced to normal value
Helium is insufficient in mistake system, the tonifying Qi into system to system regulating valve of test medium steel cylinder is at this moment automatically opened, when head tank pressure
Power closes regulating valve when being restored to normal value.
In above-mentioned technical proposal, it is preferable that described device has the function of Work condition analogue.
In above-mentioned technical proposal, it is preferable that detector is photoionization detector (PID), flame ionization detector
(FID) or mass spectrograph.
In above-mentioned technical proposal, it is preferable that test station is valve and filler or flange and gasket.
In above-mentioned technical proposal, it is preferable that test(ing) medium is helium or methane.
In above-mentioned technical proposal, it is preferable that described device can simulate high temperature and pressure and change to operating condition between normal temperature and pressure,
By designing the change frequency of different parameters, seal assembly performance parameter under the conditions of specific operation is obtained.
In above-mentioned technical proposal, it is preferable that test station outlet line is connected with heat exchanger tube pass, and heat exchanger shell pass passes through
Pipeline is connected with cooler.
The object of the present invention is to provide a kind of valve of Work condition analogue function, flange and the low leakage sealed performances of sealing material
The method of inspection.It is able to achieve low leakage (anti-loss) service check to valve and filler, flange and gasket, can to new purchase or
The valve of inventory, filler, flange, gasket sealing performance detect and quality control, and the equipment of new device is selected
Whether type design rationally carries out simplation verification, and the present invention, which is able to achieve, carries out service check to the equipment seal assembly such as valve, flange,
The performance certification system of seal assembly is set up, guarantees that the design of the water-tight equipments such as valve, flange and type selecting meet the requirements, from source
Equipment leakage is reduced on head, is realized " the source control " discharged to VOCs, is achieved preferable technical effect.
Detailed description of the invention
Fig. 1 is the flow diagram of the method for the invention.
In Fig. 1,1, head tank；2, gas storage surge tank；3, compressor；4, pressure surge tank；5, heater；6, detector；
7, cooler.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
[embodiment 1]
A kind of low leakage sealed service check method, as shown in Figure 1, a kind of low leakage sealed performance inspection device is provided,
Including simulation working condition system, seal assembly test station and leak detection system, simulation working condition system is by compressor, raw material
Tank, surge tank and heating and cooling system composition, it is maximum by automatically controlling pressure, temperature, the flow velocity operating condition of simulation field device
Degree simulated field conditions；It is valve and filler experiment station that seal assembly, which tests station,；Leak detection system include detector,
Leak detection system is connected with the test station, and compressor outlet is connected with heating device entrance, heating means exit and examination
It tests station to be connected, test station outlet line is connected with surge tank, suction port of compressor, head tank respectively after heat exchanger, raw material
Test medium pipeline is connected on tank；Control system is connected with Simulated System；.
Test station outlet line is connected with heat exchanger tube pass, and heat exchanger shell pass is connected by pipeline with cooler.
The leak detection system includes PID, FID, mass spectrometer detector.Described device can simulate high temperature and pressure and arrive
Operating condition changes between normal temperature and pressure, by designing the change frequency of different parameters, obtains seal assembly under the conditions of specific operation
It can parameter
When installation, simulation working condition system, seal assembly are tested into station and leak detection system three parts group as shown in Figure 1
It is fitted together, forms low leakage sealed service check method completely with Work condition analogue function.
When carrying out low leakage sealed service check, include the following steps:
(1) test medium enters system to testing pressure by pressure reducing valve after surge tank, and by heater by medium temperature
Degree is promoted to test temperature.Air intake valve is closed, system maintains test pressure by pressure reducing valve, and passes through heater and controlling temp type companion
The torrid zone carries out sealing property of sealing component inspection after maintaining test temperature, experiment condition to reach requirement, obtains the slip of sealing element；
(2) after sealing element test ending, air intake valve is opened, and test medium is dropped by pressure reducing valve after valve and cooler
Pressure, cooling, are emitted into system；
(3) discharge gas can improve raw material pressure inside the tank after entering system, at this moment close pressure surge tank imported valve, open
Gas storage surge tank inlet valve simultaneously opens supercharger by the gas compression of discharge to gas storage surge tank, just to head tank pressure recovery
Gas storage surge tank imported valve, close compressor are closed after constant value, and open pressure surge tank inlet valve；
(4) medium is supplemented in head tank after being depressured by counterbalance valve in gas storage surge tank when normal experiment, and system is first
By gas storage surge tank into system make-up gas, if explanation is due to leakage loss when raw material pressure inside the tank is reduced to normal value
Helium is insufficient in system, the tonifying Qi into system to system regulating valve of test medium steel cylinder is at this moment automatically opened, when raw material pressure tank
Regulating valve is closed when being restored to normal value.
[embodiment 2]
According to condition and step described in embodiment, only testing station is flange and gasket test station in fact.
When carrying out low leakage sealed service check, include the following steps:
(1) test medium enters system to testing pressure by pressure reducing valve after surge tank, and by heater by medium temperature
Degree is promoted to test temperature.Air intake valve is closed, system maintains test pressure by pressure reducing valve, and passes through heater and controlling temp type companion
The torrid zone carries out sealing property of sealing component inspection after maintaining test temperature, experiment condition to reach requirement, obtains the slip of sealing element；
(2) after sealing element test ending, air intake valve is opened, and test medium is dropped by pressure reducing valve after valve and cooler
Pressure, cooling, are emitted into system；
(3) discharge gas can improve raw material pressure inside the tank after entering system, at this moment close pressure surge tank imported valve, open
Gas storage surge tank inlet valve simultaneously opens supercharger by the gas compression of discharge to gas storage surge tank, just to head tank pressure recovery
Gas storage surge tank imported valve, close compressor are closed after constant value, and open pressure surge tank inlet valve；
(4) medium is supplemented in head tank after being depressured by counterbalance valve in gas storage surge tank when normal experiment, and system is first
By gas storage surge tank into system make-up gas, if explanation is due to leakage loss when raw material pressure inside the tank is reduced to normal value
Helium is insufficient in system, the tonifying Qi into system to system regulating valve of test medium steel cylinder is at this moment automatically opened, when raw material pressure tank
Regulating valve is closed when being restored to normal value.
The present invention is able to achieve low leakage (anti-loss) service check to valve and filler, flange and gasket, can be to new
Purchase or the valve of inventory, filler, flange, gasket sealing performance detect and quality controls, and new device is set
Whether standby Selection and Design rationally carries out simplation verification, and the present invention, which is able to achieve, carries out performance to the equipment seal assembly such as valve, flange
It examines, it is established that the performance certification system of seal assembly guarantees that the design of the water-tight equipments such as valve, flange and type selecting conform to
It asks, equipment leakage is reduced from source, realize " the source control " discharged to VOCs, achieve preferable technical effect.
Compared with the present invention, the existing low Leak seals parts method of inspection both at home and abroad, mainly in normal temperature and pressure or specific
It tests under the conditions of temperature, test(ing) medium cannot be replaced, detection means is single, lack working condition lower seal service check
Ability cannot really reflect sealing performance of the sealing element under working condition.
Claims (7)
1. a kind of low leakage sealed service check method, using the low leakage sealed performance inspection device with Work condition analogue function
Low leakage sealed service check is carried out, the low leakage sealed performance inspection device includes simulation working condition system, seal assembly examination
Station and leak detection system are tested, simulation working condition system is made of compressor, head tank, surge tank and heating and cooling system, close
It includes that a valve and filler or flange and gasket test station that sealing assembly, which tests station, and leak detection system includes detector,
Leak detection system is connected with the test station, and compressor outlet is connected with heating device entrance, heating means exit and examination
It tests station to be connected, test station outlet line is connected with surge tank, suction port of compressor, head tank respectively after heat exchanger, raw material
Test medium pipeline is connected on tank；Control system is connected with Simulated System；
When carrying out low leakage sealed service check, include the following steps:
(1) test medium enters system to testing pressure by pressure reducing valve after surge tank, and is proposed medium temperature by heater
Test temperature is risen to, closes air intake valve, system maintains test pressure by pressure reducing valve, and passes through heater and controlling temp type heating tape
Sealing property of sealing component inspection is carried out after maintaining test temperature, experiment condition to reach requirement；
(2) after sealing element test ending, air intake valve is opened, and be depressured test medium by pressure reducing valve after valve and cooler,
Cooling, is emitted into system；
(3) discharge gas can improve raw material pressure inside the tank after entering system, at this moment close pressure surge tank imported valve, open gas storage
Surge tank inlet valve simultaneously opens supercharger by the gas compression of discharge to gas storage surge tank, to head tank pressure recovery normal value
Gas storage surge tank imported valve, close compressor are closed afterwards, and open pressure surge tank inlet valve；
(4) medium is supplemented in head tank after being depressured by counterbalance valve in gas storage surge tank when normal experiment, and system relies on first
Gas storage surge tank make-up gas into system illustrates if raw material pressure inside the tank is reduced to normal value due to leakage loss system
Helium is insufficient in uniting, and the tonifying Qi into system to system regulating valve of test medium steel cylinder is at this moment automatically opened, when raw material pressure tank is extensive
Regulating valve is closed when arriving normal value again.
2. low leakage sealed service check method according to claim 1, it is characterised in that described device has Work condition analogue
Function.
3. low leakage sealed service check method according to claim 1, it is characterised in that detector is photoionization detection
Device, flame ionization detector or mass spectrograph.
4. low leakage sealed service check method according to claim 1, it is characterised in that test station is valve and filler
Or flange and gasket.
5. low leakage sealed service check method according to claim 1, it is characterised in that test medium is helium or methane.
6. low leakage sealed service check method according to claim 1, it is characterised in that described device can simulate high temperature
High pressure changes to operating condition between normal temperature and pressure, by designing the change frequency of different parameters, seals under the conditions of acquisition specific operation
Assembly property parameter.
7. low leakage sealed service check method according to claim 1, it is characterised in that test station outlet line and change
Hot device tube side is connected, and heat exchanger shell pass is connected by pipeline with cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677441.9A CN109387342A (en) | 2017-08-09 | 2017-08-09 | Low leakage sealed service check method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677441.9A CN109387342A (en) | 2017-08-09 | 2017-08-09 | Low leakage sealed service check method |
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| CN109387342A true CN109387342A (en) | 2019-02-26 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6259769B2 (en) * | 1980-03-05 | 1987-12-12 | Nippon Oil Co Ltd | |
| CN101118197A (en) * | 2007-09-06 | 2008-02-06 | 中国核动力研究设计院 | High-temperature high pressure helium leak detection method and apparatus for detecting leakage thereof |
| CN101806662A (en) * | 2009-02-12 | 2010-08-18 | 方存正 | Low temperature test device |
| CN103454168A (en) * | 2013-09-10 | 2013-12-18 | 浙江省泵阀产品质量检验中心 | Rapid gas decompression (RGD) detection system and method of anti-explosion O-shaped ring for petrochemical valve |
| CN105118536A (en) * | 2015-08-18 | 2015-12-02 | 中国人民解放军陆军军官学院 | Adjustable charge-discharge type high temperature and high pressure helium gas experimental system and method |
| CN105181267A (en) * | 2015-07-17 | 2015-12-23 | 武汉工程大学 | Device for testing leakage rate of bolted flange connection system |
-
2017
- 2017-08-09 CN CN201710677441.9A patent/CN109387342A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6259769B2 (en) * | 1980-03-05 | 1987-12-12 | Nippon Oil Co Ltd | |
| CN101118197A (en) * | 2007-09-06 | 2008-02-06 | 中国核动力研究设计院 | High-temperature high pressure helium leak detection method and apparatus for detecting leakage thereof |
| CN101806662A (en) * | 2009-02-12 | 2010-08-18 | 方存正 | Low temperature test device |
| CN103454168A (en) * | 2013-09-10 | 2013-12-18 | 浙江省泵阀产品质量检验中心 | Rapid gas decompression (RGD) detection system and method of anti-explosion O-shaped ring for petrochemical valve |
| CN105181267A (en) * | 2015-07-17 | 2015-12-23 | 武汉工程大学 | Device for testing leakage rate of bolted flange connection system |
| CN105118536A (en) * | 2015-08-18 | 2015-12-02 | 中国人民解放军陆军军官学院 | Adjustable charge-discharge type high temperature and high pressure helium gas experimental system and method |
Non-Patent Citations (1)
| Title |
|---|
| 国际标准化组织: "《ISO 15848-1》", 31 December 2016 * |
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Application publication date: 20190226 |