CN105092164A - Air tightness detection method of seal ring and detection device thereof - Google Patents
Air tightness detection method of seal ring and detection device thereof Download PDFInfo
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- CN105092164A CN105092164A CN201510565965.XA CN201510565965A CN105092164A CN 105092164 A CN105092164 A CN 105092164A CN 201510565965 A CN201510565965 A CN 201510565965A CN 105092164 A CN105092164 A CN 105092164A
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Abstract
The present invention discloses an air tightness detection method of a seal ring and a detection device thereof. The air tightness detection device provided by the invention comprises a leak detecting device, consisting of a first cavity, a top fastening flange and a bottom fastening flange; a simulation installation device arranged in the first cavity, consisting of a tank, a mounting flange communicated with the tank, a first inflation inlet communicated with the tank and a barometer communicated with the tank; a vacuum device, consisting of a second cavity, a second inflation inlet communicated with the second cavity and a density sensor communicated with the second cavity; and a gas connecting pipe arranged between the leak detecting device and the vacuum device, and a solenoid valve is connected on the gas connecting pipe. The present invention further discloses an air tightness detection method of the seal ring. According to the air tightness detection method of the seal ring and the detection device thereof, the quantitative determination of the air tightness of the seal ring may be performed, and the self-detecting and the alarm of the detection process are realized so that the detection accuracy rate is improved, the structure is simplified, the operation is convenient, and the cost is easy to be controlled.
Description
Technical field
The present invention relates to air-leakage test field, particularly relate to a kind of O-ring seal air-tightness detection method and device.
Background technology
In prior art, O-ring seal is normally based on extrusion pressing type sealing principle.Particularly, such as: after crush seal circle generation elastic deformation, sealing contact surface causes contact, contact is greater than the interior pressure of sealed medium, then do not leak, otherwise then leak.
Carrying out air-leakage test to O-ring seal, is a kind of effective means of O-ring seal key property research.By to the bubble-tight inspection of O-ring seal after aging test, coordinate with the research of O-ring seal aging test, the direct rule of O-ring seal serviceable life and gas leakage can be obtained; Before use air-leakage test is carried out to the O-ring seal after long-term leaving standstill, can its performance after storage of Timeliness coverage good and bad, to judge whether its operating mode is suitable for.
Present stage, for the air tightness test of O-ring seal, leak locator is utilized to test often, result only can qualitative embodiment its whether leak gas, can not to its leak rate quantitatively characterizing, cannot obtain the critical index such as year leak rate, and quantitatively to detect be the very important link of O-ring seal performance test; Meanwhile, existing method of testing, all cannot realize, from judging and warning function, cannot realizing the transmission of data and host computer.Need a kind of proving installation, meet above-mentioned requirements.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of O-ring seal air-tightness detection method and device, quantitatively can detect the air-tightness of O-ring seal, realizes Autonomous test and the warning of testing process, improves Detection accuracy; Structure is simplified, simple operation, is easy to control cost.
In order to solve the problems of the technologies described above, The embodiment provides a kind of O-ring seal air-tightness detection device, in order to quantitatively to detect the air-tightness of O-ring seal, it is characterized in that, comprise: leakage detection apparatus, leakage detection apparatus comprises the first cavity and enclosing and is sealed in top clamp flange and the end clamp flange of the ends of the first cavity; Be arranged on the O-ring seal simulation erecting device in the first cavity, O-ring seal simulation erecting device comprises: the tank body that can hold a certain amount of search gas, be connected with tank body in order to the mounting flange of fastening O-ring seal to be detected, be connected with tank body fill the first inflation inlet of search gas and be connected to characterize the rain glass of charge pressure with tank body; Vacuum plant, vacuum plant comprises the second cavity, is connected in order to the second inflation inlet of vacuumizing the second cavity and the density sensor being connected to record gas concentration in the second cavity with the second cavity with the second cavity; And the gas connection pipe be arranged between leakage detection apparatus and vacuum plant, in succession in order to control between leakage detection apparatus and vacuum plant the solenoid valve of whether conducting on gas connection pipe, wherein: according to the ON operation time of solenoid valve, the concentration of search gas in the vacuum plant of density sensor record, obtain O-ring seal to be detected year leak rate data message.
Wherein, also comprise: in order to the host computer of search gas concentration data in the vacuum plant of collection density sensor record, density sensor is connected with host computer.
Wherein, the opposite end of gas connection pipe is connected to leakage detection apparatus and vacuum plant respectively by a Self-sealing valve.
Wherein, also comprise: in order to the time relay of Controlling solenoid valve opening/closing time, the time relay is connected with solenoid valve.
Wherein, the first inflation inlet and the second inflation inlet screw respectively be provided with dust cap.
Wherein, the first cavity is the hollow cylindrical structure that two ends are provided with opening, its openend is offered multiple pilot hole in order to connect top clamp flange and end clamp flange.
Wherein, rain glass and density sensor can be changed according to the type of search gas.
The invention also discloses a kind of O-ring seal air-tightness detection method, in order to quantitatively to detect the air-tightness of O-ring seal, comprise the following steps: O-ring seal to be detected is installed on the mounting flange of O-ring seal simulation erecting device, the tank body of O-ring seal simulation erecting device vacuumizes, and is filled with the search gas of certain pressure; The entirety of O-ring seal simulation erecting device puts into the first cavity of a leakage detection apparatus, is sealed by the first cavity at the ends assembling top clamp flange of the first cavity and end clamp flange; Gas connection pipe is connected between leakage detection apparatus and a vacuum plant, vacuum plant is vacuumized and reaches setting; Install a density sensor on vacuum plant, install a solenoid valve on gas connection pipe; Wherein: according to the ON operation time of solenoid valve, the concentration of search gas in the vacuum plant of density sensor record, obtain O-ring seal to be detected year leak rate data message.
Wherein, also comprise: density sensor is connected to a host computer, solenoid valve is connected a time relay, arrange the working time of solenoid valve, battery valve is opened and closed step.
Wherein, also comprise: the step changing rain glass and density sensor according to the type of search gas respectively.
Implement O-ring seal air-tightness detection method provided by the present invention and device, there is following beneficial effect:
The first, gas leakage can be carried out for O-ring seal and detect, accurately judge its working condition, realize Autonomous test and the warning of testing process, improve Detection accuracy.
Second, can according to the ON operation time of solenoid valve, the concentration of search gas in the vacuum plant of density sensor record, obtain O-ring seal to be detected year leak rate data message, simultaneously, can carry out going deep into computing for value, obtain more evaluation index, for the performance study of O-ring seal, reliability consideration provide effective scheme.
3rd, structure is simplified, simple operation, is easy to control cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the external structure schematic diagram of embodiment of the present invention O-ring seal air-tightness detection device.
Fig. 2 is the perspective view of embodiment of the present invention O-ring seal air-tightness detection device.
Fig. 3 is the sectional structure schematic diagram of the leakage detection apparatus of embodiment of the present invention O-ring seal air-tightness detection device.
Fig. 4 is the structural representation of the O-ring seal simulation erecting device of embodiment of the present invention O-ring seal air-tightness detection device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Shown in Fig. 1-Fig. 4, it is the embodiment one of O-ring seal air-tightness detection device of the present invention.
O-ring seal air-tightness detection device in the present embodiment, in order to quantitatively to detect the air-tightness of O-ring seal, specifically comprises: the simulation of leakage detection apparatus 1, O-ring seal erecting device 2, vacuum plant 3 and gas connection pipe 4.Introduce the structure of every part, composition and principle of work thereof below in detail.
Leakage detection apparatus 1 comprises the first cavity 11 and enclosing and is sealed in top clamp flange 12 and the end clamp flange 13 of the ends of the first cavity 11.First cavity 11 is hollow columnar structures that two ends are provided with opening, its upper and lower opening end extends the annular connected unit (not shown) in order to assembly connection respectively, connected unit is offered multiple pilot hole in order to connect top clamp flange 12 and end clamp flange 13.Structure, the shape of top clamp flange 12 and end clamp flange 13 are roughly the same, in tabular.Two clamp flanges are offered respectively the screw with above-mentioned connected unit with the corresponding coupling in pilot hole position.During enforcement, top clamp flange 12 and end clamp flange 13 enclosing be sealed in the ends of the first cavity 11 respectively, makes the first cavity 11 become confined space.By arranging the hermetically-sealed construction of top clamp flange 12 and end clamp flange 13, itself and the sealing of the first cavity 11 in junction can be ensured.
Preferably, push up clamp flange 12 and be provided with the interface be connected with the first cavity 11, in order to connect gas connection pipe 4.
O-ring seal simulation erecting device 2 is placed in the first cavity 11 when testing, it comprises the tank body 21 that can hold a certain amount of search gas, be connected with tank body 21 in order to the mounting flange 22 of fastening O-ring seal to be detected, be connected with tank body 21 fill the first inflation inlet 23 of search gas and be connected to characterize the rain glass 24 of charge pressure with tank body 21.
Preferably, the first inflation inlet 23 is protected to screw dust cap (not shown), with the serviceable life of extension device in a non-operative state.
Vacuum plant 3 comprises the second cavity 31, is connected in order to the second inflation inlet 32 of vacuumizing the second cavity 31 and the density sensor 33 being connected to record gas concentration in the second cavity 31 with the second cavity 31 with the second cavity 31.
Preferably, the second inflation inlet 32 is protected to screw dust cap (not shown), with the serviceable life of extension device in a non-operative state.
Gas connection pipe 4 is arranged between leakage detection apparatus 1 and vacuum plant 3.During concrete enforcement, in succession in order to control between leakage detection apparatus 1 and vacuum plant 3 solenoid valve 5 of whether conducting on gas connection pipe 4, wherein: the concentration of search gas in the vacuum plant 3 that can record according to the ON operation time of solenoid valve 5 and density sensor 33, obtain O-ring seal to be detected year leak rate data message.
Preferably, the opposite end of gas connection pipe 4 is connected to leakage detection apparatus 1 and vacuum plant 3 respectively by a Self-sealing valve 6, wherein: Self-sealing valve 6 mainly plays the function strengthening sealing.
Preferably, also comprise: the host computer (not shown) of search gas concentration data in the vacuum plant 3 recorded in order to collection density sensor 33, density sensor 33 is connected with host computer, and its effect is: record the data message that also analytic density sensor 33 is uploaded.
Preferably, also comprise: in order to the time relay (not shown) of Controlling solenoid valve 5 opening/closing time, the time relay is connected with solenoid valve 5, its effect is the opening/closing time of Controlling solenoid valve 5, to carry out deep reckoning for value.
In the specific implementation, with SF6 gas for search gas object, O-ring seal to be detected is O type circle is example to O-ring seal air-tightness detection device in the present embodiment, and its Cleaning Principle is described.
First, mounting O-shaped rings is on the mounting flange 22 on O-ring seal simulation erecting bed 2, and the tank body 21 of then O-ring seal being simulated erecting bed 2 vacuumizes, and is filled with the SF6 gas of certain pressure.To install and completely charged O-ring seal simulation erecting bed 2 entirety puts into the first cavity 11 of leakage detection apparatus 1, respectively at upper and lower opening end fastening top clamp flange 12 and the end clamp flange 13 respectively of leakage detection apparatus 1 first cavity 11, ensure two clamp flanges and the sealing of the first cavity 11 in junction.And then, the opposite end of gas connection pipe 4 is connected to leakage detection apparatus 1 and vacuum plant 3 respectively by a Self-sealing valve 6, is evacuated to the front setting of examination to vacuum plant 3 simultaneously.Subsequently, packing density sensor 33 is connected to vacuum plant 3, simultaneously Connection Density sensor 33 and to host computer, solenoid valve 5 is connected with the time relay, the working time of solenoid valve 5 is set, opens solenoid valve, start to test.Owing to forming strong pressure differential between leakage detection apparatus 1 and vacuum plant 3, the gas that mounting flange 22 place that O-ring seal can be impelled to simulate erecting device 2 leaks all flows to vacuum plant 3 due to the existence of pressure gradient.
Finally, when solenoid valve 5 arrives the assigned work time, solenoid valve 5 cuts out automatically, and density sensor 33 records the concentration of SF6 gas in vacuum plant 3.After off-test, the gas leakage concentration of SF6 gas can be monitored according to the concentration of the SF6 gas of density sensor 33 record, judge whether mounting flange 22 place leaks gas.In addition, utilize the concentration value that this density sensor 33 records, in conjunction with the working time of solenoid valve 5, the year leak rate of tested O-ring seal can be extrapolated, and then its serviceable life is assessed.
In other embodiment of O-ring seal air-tightness detection device of the present invention, O-ring seal to be detected can be the O-ring seal of other shape except above-mentioned O RunddichtringO or structure, such as special-shaped seal ring, only needs the hermetically-sealed construction of the mounting flange 22 redesigning O-ring seal simulation erecting bed 2 during enforcement.Search gas also can be other gas except above-mentioned SF6 gas, if need hunt leak to other types gas during enforcement, then only need change the rain glass 24 suitable with designated gas type and density sensor 33.
The invention also discloses a kind of O-ring seal air-tightness detection method, in order to quantitatively to detect the air-tightness of O-ring seal, comprise the following steps:
O-ring seal to be detected is installed on the mounting flange of O-ring seal simulation erecting device, and the tank body of O-ring seal simulation erecting device vacuumizes, and is filled with the search gas of certain pressure; During enforcement, search gas is SF6 gas, and O-ring seal to be detected is O type circle.
The entirety of O-ring seal simulation erecting device puts into the first cavity of a leakage detection apparatus, is sealed by the first cavity at the ends assembling top clamp flange of the first cavity and end clamp flange; During enforcement, two clamp flanges and the sealing of the first cavity in junction need be ensured.
Gas connection pipe is connected between leakage detection apparatus and a vacuum plant, vacuum plant is vacuumized and reaches setting;
Install a density sensor on vacuum plant, install a solenoid valve on gas connection pipe; Wherein: according to the ON operation time of solenoid valve, the concentration of search gas in the vacuum plant of density sensor record, obtain O-ring seal to be detected year leak rate data message.During concrete enforcement, owing to forming strong pressure differential between leakage detection apparatus and vacuum plant, the gas that the mounting flange place that O-ring seal can be impelled to simulate erecting device leaks all flows to vacuum plant due to the existence of pressure gradient.
During concrete enforcement, when solenoid valve 5 arrives the assigned work time, solenoid valve 5 cuts out automatically, and density sensor 33 records the concentration of SF6 gas in vacuum plant 3.After off-test, the gas leakage concentration of SF6 gas can be monitored according to the concentration of the SF6 gas of density sensor 33 record, judge whether mounting flange 22 place leaks gas.In addition, utilize the concentration value that this density sensor 33 records, in conjunction with the working time of solenoid valve 5, the year leak rate of tested O-ring seal can be extrapolated, and then its serviceable life is assessed.
Preferably, also comprise: density sensor is connected to a host computer, solenoid valve is connected a time relay, arrange the working time of solenoid valve, battery valve is opened and closed step.
Preferably, also comprise: the step changing rain glass and density sensor according to the type of search gas respectively.Its effect is the range of application expanding search gas, and it also can be other gas except above-mentioned SF6 gas.
Implement O-ring seal air-tightness detection method of the present invention and device, there is following beneficial effect:
The first, gas leakage can be carried out for O-ring seal and detect, accurately judge its working condition, realize Autonomous test and the warning of testing process, improve Detection accuracy.
Second, can according to the ON operation time of solenoid valve, the concentration of search gas in the vacuum plant of density sensor record, obtain O-ring seal to be detected year leak rate data message, simultaneously, can carry out going deep into computing for value, obtain more evaluation index, for the performance study of O-ring seal, reliability consideration provide effective scheme.
3rd, structure is simplified, simple operation, is easy to control cost.
Claims (10)
1. an O-ring seal air-tightness detection device, in order to quantitatively to detect the air-tightness of O-ring seal, is characterized in that, comprising:
Leakage detection apparatus, described leakage detection apparatus comprises the first cavity and enclosing and is sealed in top clamp flange and the end clamp flange of the ends of described first cavity;
Be arranged on the O-ring seal simulation erecting device in described first cavity, described O-ring seal simulation erecting device comprises: the tank body that can hold a certain amount of search gas, be connected with described tank body in order to the mounting flange of fastening O-ring seal to be detected, be connected to fill the first inflation inlet of search gas with described tank body and be connected to characterize the rain glass of charge pressure with described tank body;
Vacuum plant, described vacuum plant comprises the second cavity, is connected in order to the second inflation inlet of vacuumizing described second cavity and the density sensor being connected to record gas concentration in described second cavity with described second cavity with described second cavity; And
Be arranged on the gas connection pipe between described leakage detection apparatus and described vacuum plant, in succession in order to control between described leakage detection apparatus and described vacuum plant the solenoid valve of whether conducting on described gas connection pipe, wherein:
According to the ON operation time of described solenoid valve, the concentration of search gas in the described vacuum plant of described density sensor record, obtain O-ring seal to be detected year leak rate data message.
2. O-ring seal air-tightness detection device as claimed in claim 1, is characterized in that, also comprise: in order to collect described density sensor record described vacuum plant in the host computer of search gas concentration data, described density sensor is connected with described host computer.
3. O-ring seal air-tightness detection device as claimed in claim 1, it is characterized in that, the opposite end of described gas connection pipe is connected to described leakage detection apparatus and described vacuum plant respectively by a Self-sealing valve.
4. O-ring seal air-tightness detection device as claimed in claim 1, is characterized in that, also comprise: in order to control the time relay of described solenoid valve opening/closing time, the described time relay is connected with described solenoid valve.
5. O-ring seal air-tightness detection device as claimed in claim 1, is characterized in that, described first inflation inlet and described second inflation inlet screws respectively and is provided with dust cap.
6. O-ring seal air-tightness detection device as claimed in claim 1, it is characterized in that, described first cavity is the hollow cylindrical structure that two ends are provided with opening, its openend is offered multiple pilot hole in order to connect described top clamp flange and clamp flange of the described end.
7. O-ring seal air-tightness detection device as claimed in claim 1, it is characterized in that, described rain glass and described density sensor can be changed according to the type of search gas.
8. an O-ring seal air-tightness detection method, in order to quantitatively to detect the air-tightness of O-ring seal, is characterized in that, comprises the following steps:
O-ring seal to be detected is installed on the mounting flange of O-ring seal simulation erecting device, and the tank body of O-ring seal simulation erecting device vacuumizes, and is filled with the search gas of certain pressure;
The entirety of described O-ring seal simulation erecting device puts into the first cavity of a leakage detection apparatus, is sealed by described first cavity at the ends assembling top clamp flange of the first cavity and end clamp flange;
Gas connection pipe is connected between leakage detection apparatus and a vacuum plant, described vacuum plant is vacuumized and reaches setting;
Install a density sensor on described vacuum plant, install a solenoid valve on described gas connection pipe; Wherein: according to the ON operation time of described solenoid valve, the concentration of search gas in the described vacuum plant of described density sensor record, obtain described O-ring seal to be detected year leak rate data message.
9. O-ring seal air-tightness detection method as claimed in claim 8, it is characterized in that, also comprise: described density sensor is connected to a host computer, described solenoid valve is connected a time relay, arrange the working time of described solenoid valve, described battery valve is opened and closed step.
10. O-ring seal air-tightness detection method as claimed in claim 9, is characterized in that, also comprise: the step changing described rain glass and described density sensor according to the type of search gas respectively.
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| CN201510565965.XA CN105092164A (en) | 2015-09-08 | 2015-09-08 | Air tightness detection method of seal ring and detection device thereof |
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| CN201510565965.XA CN105092164A (en) | 2015-09-08 | 2015-09-08 | Air tightness detection method of seal ring and detection device thereof |
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| CN105911226A (en) * | 2016-06-02 | 2016-08-31 | 中国工程物理研究院材料研究所 | Endoscopic testing device |
| CN108318376A (en) * | 2017-12-19 | 2018-07-24 | 兰州空间技术物理研究所 | A method of judging sealing cesium beam tube material out-gassing rate |
| CN110501123A (en) * | 2019-09-18 | 2019-11-26 | 上海交通大学 | High pressure and low temperature environment lower seal pad piece performance test device |
| CN111189597A (en) * | 2020-01-10 | 2020-05-22 | 天津泰士康医疗科技有限公司 | Hemodialysis dry powder bucket leak detector |
| CN111678652A (en) * | 2020-06-23 | 2020-09-18 | 北京品驰医疗设备有限公司 | Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device |
| CN113145965A (en) * | 2020-06-29 | 2021-07-23 | 千住金属工业株式会社 | Welding device and method for detecting abnormality of pad |
| CN113295341A (en) * | 2021-05-19 | 2021-08-24 | 国网天津市电力公司电力科学研究院 | VRLA storage battery cold-resistant heat-resistant sealing performance test method |
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| CN113145965A (en) * | 2020-06-29 | 2021-07-23 | 千住金属工业株式会社 | Welding device and method for detecting abnormality of pad |
| CN113145965B (en) * | 2020-06-29 | 2022-06-24 | 千住金属工业株式会社 | Welding device and method for detecting abnormality of pad |
| CN113295341A (en) * | 2021-05-19 | 2021-08-24 | 国网天津市电力公司电力科学研究院 | VRLA storage battery cold-resistant heat-resistant sealing performance test method |
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Application publication date: 20151125 |
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