CN104122048A - High-pressure gas tightness detection system - Google Patents
High-pressure gas tightness detection system Download PDFInfo
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- CN104122048A CN104122048A CN201410384177.6A CN201410384177A CN104122048A CN 104122048 A CN104122048 A CN 104122048A CN 201410384177 A CN201410384177 A CN 201410384177A CN 104122048 A CN104122048 A CN 104122048A
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Abstract
The invention discloses a high-pressure gas tightness detection system. The high-pressure gas tightness detection system is used for performing quantitative detection on the high-pressure gas tightness of a high-pressure sealing system, wherein a certain quantity of gas for detection is introduced into a high-pressure tank and then water is continuously injected into the high-pressure tank so that the gas pressure in the detection system is capable of meeting the test requirement, and quantitative detection is performed on the gas for detection leaking from the high-pressure sealing system under this circumference, and therefore, the sealing leakage quantity of the high-pressure sealing system under corresponding testing working conditions can be obtained. According to the result of the quantitative detection, the designed leakage quantity of a sealing element can be verified so that the reasonability and safety of the design of the sealing element can be verified, and the result of the quantitative detection also can be used for detecting the leakage quantity under variable working conditions, and therefore, the correspondence between the working conditions of the sealing element and the leakage quantity can be obtained, and furthermore, the leakage quantity under the working conditions of the sealing element can be determined; consequently, accurate data support can be provided for the design of the sealing element, the connecting part of the sealing element and the like.
Description
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Technical field
the present invention relates to a kind of high pressure air tightness detection system.
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Background technology
between the equipment of the industrial sectors such as nuclear power, thermoelectricity, the energy and pipeline flange, conventionally need sealing and form the pressure system of sealing.For pressure system, leakage is absolute, and it is relative not leaking, and allows slip index as long as the seal leakage amount of system meets the maximum that the factors such as environmental protection, safety and economy determine, can think that system do not leak.At present, the reliability of sealing is detected and has two kinds of modes, one is high water pressure test, and this method can only be carried out qualitative detection, generally can only adopt visual examination whether to leak; When another kind method, adopt low-pressure gas, as helium, nitrogen etc., carry out the detection of low-pressure leak rate, although this method can realize quantitative check, cannot under high pressure operating mode, carry out the quantitative detection of leakage rate.Therefore whether effectively, the seal leakage amount to seal under high pressure conditions quantitatively detects, to solve the test problems of current sealing reliability, also become pressure system sealing gordian technique.
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Summary of the invention
the object of the invention is to overcome the shortcoming of prior art, a kind of high pressure air tightness detection system is provided.
for achieving the above object, the technical solution used in the present invention is:
a kind of high pressure air tightness detection system, high pressure sealing system to be detected has the pressure chamber of sealing, described pressure chamber arranges by the seal sealing that is circumferentially closed form, described detection system comprises the pressure pan with closed inner chamber, for being filled with insoluble to described pressure pan or being insoluble in water and being difficult for making the detection of the described seal oxidation deactivation accumulator unit of gas, for the water supply installation to described pressure pan injected water, the top and bottom of described pressure pan offers respectively the upper gas-liquid mouth and the lower gas-liquid mouth that are connected with described closed inner chamber, described lower gas-liquid mouth place is connected with the drainpipe with draining valve, described upper gas-liquid mouth place is connected with the leak detection tube with operation valve, described pressure chamber has coupled entrance and the outlet of leading to and being positioned at different both sides, described leak detection tube is connected to described porch, setting can be opened or close in described exit by valve, described detection system also comprises that the gas for described pressure chamber is leaked out through described seal place carries out the slip detection system quantitatively detecting.
preferably, the freeing port of described drainpipe is vertically higher than the top of described pressure pan.
preferably, described accumulator unit is the gas-holder that stores nitrogen or helium.
preferably, described water supply installation comprises water tank, is connected between described water tank and described pressure pan and for the water of described water tank being fed to the high-pressure pump of described pressure pan.
preferably, described detection system also comprises the water-level gauge for detection of fluid level condition in described pressure pan.
preferably, described detection system also comprises the first tensimeter for detection of gaseous tension numerical value in described pressure pan.
further, on described leak detection tube, be also provided with for detection of the second tensimeter that passes into gaseous tension numerical value in described pressure chamber.
preferably, in described high pressure sealing system to be detected, the outside perimembranous of described seal is also equipped with exterior seal ring, between described seal, described exterior seal ring and described high pressure sealing system, form and airtight collect the drawing of gas leaking out through described pressure chamber and leak chamber, described slip detection system was leaked chamber and is connected with described drawing.
further, described high pressure sealing system to be detected comprise have hollow cavity two web members, be sealedly connected on the described seal between two described web members, between the described hollow cavity of described seal and described web member, form described pressure chamber.
due to the utilization of technique scheme, the present invention compared with prior art has following advantages: high pressure air tightness detection system of the present invention, for the high pressure gas sealing of high pressure sealing system is quantitatively detected, wherein by be filled with certain detection gas in pressure pan, again constantly to water filling in pressure pan, can make gaseous tension in detection system reach the requirement of test, by slip detection system, the detection that under this situation, high pressure sealing system leaks out is quantitatively detected with gas, just can know the seal leakage amount of high pressure sealing system under corresponding operating condition of test, thereby the high pressure gas sealing to seal is carried out quantitatively.
this detection system and the quantitative detection of corresponding detection method applicable to seal leakage amount in the industrial sector high pressure gas sealing systems such as nuclear power, thermoelectricity, the energy.According to this quantitative testing result, not only can verify seal designs slip, thereby rationality and the security of checking seal designs, and the leakage rate that can be used for (temperature, pressure, medium etc. change) under variable working condition condition detects, and then can obtain the corresponding relation between operating mode (temperature, pressure, medium etc.) condition and the leakage rate of seal, thereby can determine the leakage rate under sealing part works condition, for the designs such as the link of seal and seal provide accurately Data support.
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Brief description of the drawings
the structural representation that accompanying drawing 1 is detection system of the present invention;
accompanying drawing 2 is the schematic diagram of another connected mode of slip detection system in detection system of the present invention.
wherein: 1, pressure pan; 11, upper gas-liquid mouth; 12, lower gas-liquid mouth; 13, the first tensimeter; 14, draining valve; 15, make-up valve; 2, accumulator unit; 21, gas-holder; 22, valve; 3, water supply installation; 31, water tank; 32, high-pressure pump; 33, valve; 4, water-level gauge; 5, high pressure sealing system; 51, seal; 52, web member; 53, valve; 54, draw and leak chamber; 55, exterior seal ring; 6, slip detection system; 7, drainpipe; 71, draining valve; 8, leak detection tube; 81, operation valve; 82, the second tensimeter.
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Embodiment
below in conjunction with accompanying drawing and preferred embodiment of the present invention, technical scheme of the present invention is further elaborated.
detection system for adopting in the present embodiment shown in Figure 1.High pressure sealing system 5 to be detected has the pressure chamber of sealing, and this pressure chamber arranges by seal 51 sealings that are circumferentially closed form, and this pressure chamber is normally worked under the full environment that has gases at high pressure.Herein, this high pressure sealing system 5 comprises that two web member 52(with hollow cavity are as pressure vessel or flange), seal 51 is sealedly connected between these two web members 5, like this, forms the pressure chamber of this high pressure sealing system 5 between seal 51 and the hollow cavity of web member 52.Detected pressures cavity volume, through the leakage rate at seal 51 places, can quantitatively detect the gas tightness of corresponding operating mode lower seal 51.
shown in Figure 1, this detection system comprises having the pressure pan 1 of closed inner chamber, detect with the accumulator unit 2 of gas, for the water supply installation 3 to pressure pan 1 injected water for being filled with to pressure pan 1, accumulator unit 1 comprises storing and detects with the gas-holder 21 of gas, is located at the valve 22 at gas-holder 21 gas outlet places, the detection storing in gas-holder 2 is insoluble with gas or is insoluble in water and is difficult for that seal 51 is oxidized or the gas of corrosion failure, conventionally can adopt the gas such as helium or nitrogen.On pressure pan 1, detect the top that can be opened in pressure pan 1 with the air intake opening of gas for passing into.Water supply installation 3 comprise be contained with the water tank 31 of water, for the water of water tank 31 is fed to the high-pressure pump 32 in pressure pan 1, be located at the valve 33 between pressure pan 1 and high-pressure pump 32, on pressure pan 1, can be opened in the bottom of pressure pan 1 for the water filling port of water filling.On pressure pan 1, be also connected with the water-level gauge 4 for detection of pressure pan 1 interior liquid level.
the bottom that the top of pressure pan 1 offers gas-liquid mouth 11, pressure pan 1 offers lower gas-liquid mouth 12, and on this, gas-liquid mouth 11 is all connected with the closed inner chamber of pressure pan 1 with lower gas-liquid mouth 12.Lower gas-liquid mouth 12 places are connected with the drainpipe 7 with draining valve 71, and the freeing port of this drainpipe 7 vertically should be higher than the top of pressure pan 1.Upper gas-liquid mouth 11 places are connected with the leak detection tube 8 with operation valve 81, and the other end of this leak detection tube 8 passes in the pressure chamber of high pressure sealing system to be detected 5.This pressure chamber has coupled logical and be positioned at entrance and the outlet of different both sides, and the above-mentioned other end of leak detection tube 8 is connected to this porch, and valve 53 is located in the above-mentioned exit of pressure chamber, by valve 53 by this port opening or close.Upper gas-liquid mouth 11 places are also provided with the first tensimeter 13, for detection of the pressure value of pressure pan 1 interior gas; On leak detection tube 8, be also provided with for detection of the second tensimeter 82 that passes into gaseous tension numerical value in pressure chamber, this second tensimeter 82 is between operation valve 81 and the entrance of pressure chamber.The bottom of pressure pan 1 is also provided with atmospheric valve 14 for completing the emptying to liquid in it after detection, and the top of pressure pan 1 is also provided with make-up valve 15, for discharging the gas in pressure pan 1.
this detection system also comprises that the gas for pressure chamber is leaked out through seal 51 places carries out the slip detection system 6 quantitatively detecting.When detection, can adopt the method shown in Fig. 1, by whole high pressure sealing system 5 being placed in an enclosure space, and then detect the variable quantity that detects use gas in this enclosure space by slip detection system 6.Also can in direct-detection seal 51 surrounding environment, detect the concentration change amount with gas, thereby obtain the leakage rate of high pressure sealing system 5, while adopting this kind of detection method, should be positioned as close to seal 51 and detect.
in addition, can also adopt the structure shown in Fig. 2 and method, in the perimembranous of the outside of seal 51, ring is established an exterior seal ring 55 again, makes this exterior seal ring 55 and seal 51, and between two web members 52 of high pressure sealing system 5, forms airtight drawing and leak chamber 54.The pressure bearing due to the exterior seal ring 55 in outside is little, and in testing process, substantially without leaking, in testing process, its leakage rate can be ignored.The detection gas leaking out through seal 51 in pressure chamber just all enters this and draws in leakage chamber 54, slip detection system 6 and this is drawn to leakage chamber 54 and be connected, and can quantitatively detect with gas the detection leaking out.
when high-potting detects, first open valve 33, operation valve 81 and valve 53, and make valve 22, draining valve 71, atmospheric valve 14, make-up valve 15 all in closed condition, in this detection system, fill water by high-pressure pump 32, thereby the air in system is drained only, until the exit of valve 53 continues to stop when flowing water water filling, valve-off 33, operation valve 81 and valve 53.
open draining valve 71, open valve 22 simultaneously, in pressure pan 1, inject detection gas (as helium or nitrogen) by gas-holder 21, intrasystem water is discharged gradually from drainpipe 7, observe the liquid level condition in pressure pan 1 by water-level gauge 4, until valve-off 71 when discharging most water in pressure pan 1 or approaching whole water.In addition, in above-mentioned drainage procedure, should avoid extraneous air to enter in system.Continue to inject detection gas in pressure pan 1, make the gaseous tension in pressure pan 1 increase gradually until it reaches setting value, can detect this force value by the first tensimeter 13, the pressure value that observes on the first tensimeter 13-the be gas pressure value in pressure pan 1 reaches after setting value, valve-off 22 stops injecting detection gas, said process is mainly the detection gas that is filled with q.s in order to allow in pressure pan 1, is beneficial to follow-up Leak Detection.
open valve 33, open operation valve 81 simultaneously, by high-pressure pump 32 to water filling supercharging in pressure pan 1, thereby the gas on compression pressure pan 1 top, the detection in pressure pan 1 enters the detection gas that makes full high pressure in pressure chamber in pressure chamber by leak detection tube 8 with gas.By continuous water filling, the pressure in detection system is added to after the detected pressures value of testing requirements, valve-off 33 stops supplying water in pressure pan 1.
for ensureing that seal 51 in high pressure sealing system 5 remains under the environment of gaseous state to avoid affecting accuracy of detection, therefore needs to avoid the hypervolia in pressure pan 1 to enter in high pressure sealing system 5 to prevent water.In above-mentioned process of the test, if the liquid level in pressure pan 1 is compared with gas flow deficiency high and in detection system, while causing water to enter in high pressure sealing system 5, illustrate at the above-mentioned detection gas flow injecting to pressure pan 1 inadequate, at this moment need after system unload, again pressurize to being filled with in pressure pan 1 to detect with gas and to water filling in pressure pan 1, re-start test.
intrasystem pressure to be detected adds to after the detected pressures value of testing requirements, now can be according to testing requirements, can closed control valve 81 by components of system as directed isolation and carry out pressurize to pressure chamber, or open operation valve 81 and valve 33 and pressure chamber carried out to ftercompction again.In above-mentioned ftercompction, pressure maintaining period, carry out the amount of the detection gas that detected pressures cavity volume leaks out through seal 51 by slip detection system 6, can obtain the seal leakage amount of high pressure sealing system 5 under corresponding operating condition of test.After end to be detected, open atmospheric valve 14 and valve 53, operation valve 81, can be to this detection system release.
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to sum up, adopt high pressure air tightness detection system of the present invention, and just can quantitatively detect the hermetic seal leakage rate of high pressure sealing system 5 easily in conjunction with above-mentioned detection method, can immediately know the seal leakage amount of high pressure sealing system 5 under corresponding operating condition of test, thereby the high pressure gas sealing of seal is quantitatively detected.This detection system and corresponding detection method are applicable to the quantitative detection of the seal leakage amount of the high pressure gas sealing system of the industrial sectors such as nuclear power, thermoelectricity, the energy.According to this quantitative testing result, not only can verify seal designs slip, thereby rationality and the security of checking seal designs, and the leakage rate that can be used for (temperature, pressure, medium etc. change) under variable working condition condition detects, and then can obtain the corresponding relation between operating mode (temperature, pressure, medium etc.) condition and the leakage rate of seal, thereby can determine the leakage rate under sealing part works condition, for the designs such as the link of seal and seal provide accurately Data support.
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above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (9)
1. a high pressure air tightness detection system, high pressure sealing system to be detected has the pressure chamber of sealing, described pressure chamber arranges by the seal sealing that is circumferentially closed form, it is characterized in that: described detection system comprises the pressure pan with closed inner chamber, for being filled with insoluble to described pressure pan or being insoluble in water and being difficult for making the detection of the described seal oxidation deactivation accumulator unit of gas, for the water supply installation to described pressure pan injected water, the top and bottom of described pressure pan offers respectively the upper gas-liquid mouth and the lower gas-liquid mouth that are connected with described closed inner chamber, described lower gas-liquid mouth place is connected with the drainpipe with draining valve, described upper gas-liquid mouth place is connected with the leak detection tube with operation valve, described pressure chamber has coupled entrance and the outlet of leading to and being positioned at different both sides, described leak detection tube is connected to described porch, setting can be opened or close in described exit by valve, described detection system also comprises that the gas for described pressure chamber is leaked out through described seal place carries out the slip detection system quantitatively detecting.
2. a kind of high pressure air tightness detection system according to claim 1, is characterized in that: the freeing port of described drainpipe is vertically higher than the top of described pressure pan.
3. a kind of high pressure air tightness detection system according to claim 1, is characterized in that: described accumulator unit is the gas-holder that stores nitrogen or helium.
4. a kind of high pressure air tightness detection system according to claim 1, is characterized in that: described water supply installation comprises water tank, is connected between described water tank and described pressure pan and for the water of described water tank being fed to the high-pressure pump of described pressure pan.
5. a kind of high pressure air tightness detection system according to claim 1, is characterized in that: described detection system also comprises the water-level gauge for detection of fluid level condition in described pressure pan.
6. a kind of high pressure air tightness detection system according to claim 1, is characterized in that: described detection system also comprises the first tensimeter for detection of gaseous tension numerical value in described pressure pan.
7. a kind of high pressure air tightness detection system according to claim 6, is characterized in that: on described leak detection tube, be also provided with for detection of the second tensimeter that passes into gaseous tension numerical value in described pressure chamber.
8. a kind of high pressure air tightness detection system according to claim 1, it is characterized in that: in described high pressure sealing system to be detected, the outside perimembranous of described seal is also equipped with exterior seal ring, between described seal, described exterior seal ring and described high pressure sealing system, form and airtight collect the drawing of gas leaking out through described pressure chamber and leak chamber, described slip detection system was leaked chamber and is connected with described drawing.
9. a kind of high pressure air tightness detection system according to claim 8, it is characterized in that: described high pressure sealing system to be detected comprise have hollow cavity two web members, be sealedly connected on the described seal between two described web members, between the described hollow cavity of described seal and described web member, form described pressure chamber.
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| CN201410384177.6A CN104122048A (en) | 2014-08-06 | 2014-08-06 | High-pressure gas tightness detection system |
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Cited By (9)
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| CN105738047A (en) * | 2016-03-29 | 2016-07-06 | 威格气体纯化科技（苏州）股份有限公司 | Online seal detection device, multi-section type seal cavity machining equipment and method |
| CN105758785A (en) * | 2016-05-06 | 2016-07-13 | 上海核工程研究设计院 | Test device for verifying performance of pressure bearing container sealing rings |
| CN106870940A (en) * | 2017-02-20 | 2017-06-20 | 国泰消防科技股份有限公司 | High pressure gas holder gas leak detection device |
| CN107478397A (en) * | 2017-08-25 | 2017-12-15 | 苏州巨能发电配套设备有限公司 | A kind of 1100MW nuclear powers outer frame hydraulic pressure airtight technology |
| CN109341790A (en) * | 2018-12-13 | 2019-02-15 | 上海权宥环保科技有限公司 | A kind of bi toba flow sensor measuring not full packages water |
| CN110242857A (en) * | 2018-03-07 | 2019-09-17 | 本田技研工业株式会社 | High pressure storage tank device |
| CN110553152A (en) * | 2019-09-06 | 2019-12-10 | 郑州畅威物联网科技有限公司 | Pressure maintaining detection method and system for gas conveying pipe network |
| CN111272342A (en) * | 2020-01-19 | 2020-06-12 | 武汉爱迪科技股份有限公司 | Liquid ammonia leakage monitoring method and system |
| CN115435978A (en) * | 2022-11-08 | 2022-12-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Air tightness detection device, system and detection method for wind tunnel sealing ring |
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| CN105738047A (en) * | 2016-03-29 | 2016-07-06 | 威格气体纯化科技（苏州）股份有限公司 | Online seal detection device, multi-section type seal cavity machining equipment and method |
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| CN110242857A (en) * | 2018-03-07 | 2019-09-17 | 本田技研工业株式会社 | High pressure storage tank device |
| CN109341790A (en) * | 2018-12-13 | 2019-02-15 | 上海权宥环保科技有限公司 | A kind of bi toba flow sensor measuring not full packages water |
| CN110553152A (en) * | 2019-09-06 | 2019-12-10 | 郑州畅威物联网科技有限公司 | Pressure maintaining detection method and system for gas conveying pipe network |
| CN111272342A (en) * | 2020-01-19 | 2020-06-12 | 武汉爱迪科技股份有限公司 | Liquid ammonia leakage monitoring method and system |
| CN111272342B (en) * | 2020-01-19 | 2021-08-03 | 武汉爱迪科技股份有限公司 | Liquid ammonia leakage monitoring method and system |
| CN115435978A (en) * | 2022-11-08 | 2022-12-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Air tightness detection device, system and detection method for wind tunnel sealing ring |
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