CN203249743U - Gas tightness detection device - Google Patents
Gas tightness detection device Download PDFInfo
- Publication number
- CN203249743U CN203249743U CN 201320257726 CN201320257726U CN203249743U CN 203249743 U CN203249743 U CN 203249743U CN 201320257726 CN201320257726 CN 201320257726 CN 201320257726 U CN201320257726 U CN 201320257726U CN 203249743 U CN203249743 U CN 203249743U
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- tracheae
- gas
- container
- testing container
- volumetric standard
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 78
- 238000007599 discharging Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model provides a gas tightness detection device. The device comprises a standard container and a control unit. Gas of first pressure is within the standard container. The standard container is connected with a to-be-detected container through a first gas tube and a second gas tube. An electromagnetic valve is arranged at the junction of the first gas tube and the second gas tube and is used for controlling connection or disconnection of the first gas tube and the second gas tube. The control unit is used for controlling the first gas tube to be connected with the second gas tube in a first time period, so that the standard container carries out inflation on the to-be-detected container. The control unit is used for controlling the first gas tube to be disconnected with the second gas tube in a second time period and respectively monitoring the pressure changes in the standard container and the to-be-detected container. The control unit is connected with the electromagnetic valve. According to the utility model, the standard container is used to carry out gas supply on the to-be-detected container, which makes gas tightness detection of the to-be-detected container with a small cavity possible; an electric proportional valve is used when inflation is carried out, so that the gas filled into the standard container is stable; and due to the fact that the standard container is used to carry out gas supply on the to-be-detected container, the inflation time of a gas pump is no longer consulted.
Description
Technical field
The utility model relates to the impermeability detection field of seal chamber, relates in particular to a kind of gas tightness pick-up unit.
Background technology
In modern industry manufacturing process, much have the workpiece that holds the gas function and all will carry out the gas tightness detection, to determine the performance quality of this workpiece, for example engine of locomotive.The quality of the gas seal property of engine directly affect the performance of engine, so when the manufacturing engine, the sealing property of seal that all will be by the detection engine is judged the performance of engine.
Existing air-tightness detection device as shown in Figure 1, comprise electrical pump 1 and pass through the proving installation 2 that conduit 3 is connected with electrical pump, be positioned at conduit 3 and be disposed with air valve 4, tensimeter 5 between electrical pump 1 and proving installation 2, existing air-tightness detection device also comprises the control device 6 that is connected with air pump 1, air valve 4 and tensimeter 5 respectively; The monitoring instrument 7 that is connected with electrical pump 1 and proving installation 2 respectively.Its principle is:
At first, control device 6 control air valves 4 are opened, and control simultaneously electrical pump 1 and start working, proving installation 2 is filled with portion gas, when the pressure that detects proving installation 2 when tensimeter 5 reached setting value, control device 6 control electrical pumps stopped inflation, and air valve 4 disconnects.Monitoring instrument 7 record test devices 2 are charged to the time of default air pressure and the change curve that air valve 4 disconnects rear maintenance stage air pressure.
When large leakage appearred in proving installation 2, gas enters time of proving installation 2 can be longer than the reference time, contrasts the time that is charged to set pressure, can detect whether there is large leakage.When slight leakage occurring, in the maintenance stage, because portion gas leaks out from proving installation 2, air pressure has decline, whether monitoring instrument 7 compares test curve and the typical curve of record, judge whether exist to reveal or reveal within tolerance interval.
Because existing technology is that proving installation is directly inflated, what judge whether to have large its reference of leakage is inflationtime, and itself just there is very large leakage phenomenon in electrical pump 1, so the time of monitoring instrument 7 records can not accurately be reflected leak case.And the volume of proving installation 2 hour, and the changes in contrast of this time can be more not obvious, and detected error can be very large.
And judge whether to exist little leakage that same situation is arranged, and tensimeter 5 carries out barometric surveying when inflation, and air pressure just fluctuation own is larger, and less for volume, the situation that amount of leakage is little, detected error are also very large.
The utility model content
The utility model provides a kind of gas tightness pick-up unit for the existing shortcoming of prior art, and this gas tightness pick-up unit can detect the less testing container of volume and whether have leakage.
In order to solve the problems of the technologies described above, it is a kind of that the utility model provides
A kind of gas tightness pick-up unit, the gas tightness for detection of testing container comprises:
Volumetric standard, inside is filled with the gas of the first pressure, with testing container by the first tracheae be connected tracheae and be connected, wherein, be provided for controlling the solenoid valve that described the first tracheae and described the second tracheae are communicated with or disconnect in described the first tracheae and described the second tracheae junction;
Be used for controlling described the first tracheae in very first time section and be communicated with described the second tracheae, described volumetric standard is inflated to described testing container, when described volumetric standard when force value between the described testing container equates, entered for the second time period; Be used for controlling described the first tracheae and the disconnection of described the second tracheae in described the second time period, and monitor respectively the control module that the pressure in described volumetric standard and the described testing container changes, described control module is connected with described solenoid valve.
Further, comprise also for the air pump that before described very first time section, is filled with the gas of described the first pressure to described volumetric standard that described air pump is connected with described volumetric standard with the 4th tracheae by the 3rd tracheae.
Further, be provided with in described the 3rd tracheae and the junction of described the 4th tracheae be used to controlling being communicated with or the electric Proportion valve of disconnection between described the 3rd tracheae and described the 4th tracheae, described electric Proportion valve is connected with described control module.
Further, also be included in to detect and finish the rear vent valve that is used for discharging the gas in the described testing container, described vent valve is connected with described testing container, and is connected with described control module.
Further, comprise that also described monitor is connected with described volumetric standard and described testing container respectively for the air pressure of drawing respectively described volumetric standard and the described testing container monitor of figure over time.
Further, described control module comprises:
The first tensimeter for the air pressure of monitoring described volumetric standard is arranged on described the first tracheae;
The second tensimeter for the air pressure of monitoring described testing container is arranged on described the second tracheae.
Further, described control module also comprises an alarm, sounds the alarm according to testing result.
The beneficial effect that the utility model is obtained is:
Because the Application standard container to the testing container air feed, becomes possibility so that the impermeability of the testing container of little cavity detects.Simultaneously the utility model is adopted when inflation and is used electric Proportion valve, so that it is stable to be filled with the gas of volumetric standard, because the Application standard container is to the testing container air feed, no longer with reference to the inflationtime of air pump.
Description of drawings
Fig. 1 is the structural representation of air-tightness detection device in the prior art;
Fig. 2 is the structural representation of the air-tightness detection device of the utility model embodiment;
Fig. 3 is the structural representation of the test fixture of the utility model embodiment;
Fig. 4 is that the air pressure of the volumetric standard of the utility model embodiment is schemed over time;
Fig. 5 is that the air pressure of the testing container of the utility model embodiment is schemed over time;
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawings and the specific embodiments the utility model is described in detail.At this, illustrative examples of the present utility model and explanation are used for explaining the utility model, but can not think restriction of the present utility model.
The utility model provides a kind of gas tightness pick-up unit, and for detection of the gas tightness of testing container, Fig. 2 is the structural representation of the air-tightness detection device of the utility model embodiment, please refer to Fig. 2, and the gas tightness pick-up unit comprises:
With reference to Fig. 2, the gas tightness pick-up unit also comprises air pump 8, and air pump 8 is connected with volumetric standard 9 with the 4th tracheae 16A by the 3rd tracheae 16, is used for being filled with to volumetric standard 9 before the very first time section gas of the first pressure.
With reference to Fig. 2, be provided with an electric Proportion valve 11 in the junction of the 3rd tracheae 16 and the 4th tracheae 16A, electric Proportion valve 11 is connected with control module 18, is used for being communicated with or disconnection between control the 3rd tracheae 16 and the 4th tracheae 16A.
With reference to Fig. 2, the gas tightness pick-up unit also comprises a vent valve 20, and vent valve 20 is connected with testing container 12, and is connected with control module 18, is used for after detecting end, and the gas of 12 li of testing containers is discharged.
With reference to Fig. 2, the gas tightness pick-up unit also comprises a monitor 19, and monitor 19 is connected with volumetric standard 9 and testing container 12 respectively, and the air pressure that is used for drawing standard container 9 and testing container 12 is schemed over time.
As a preferred embodiment, control module 18 comprises: with reference to Fig. 2,
The first tensimeter 13, the first tensimeters 13 are used for the air pressure of monitoring standard container 9, and are arranged on the first tracheae 17;
The second tensimeter 14, the second tensimeters 14 are used for the air pressure of monitoring testing container 12, and are arranged on the second tracheae 17A.
As an embodiment who is more preferably, control module 18 also comprises an alarm, and alarm sounds the alarm according to testing result, for example detects testing container 12 and exists when leaking, and alarm sends corresponding alarm song.
Wherein, when volumetric standard 9 was full of the gas of the first pressure by gas, air pressure was known, was designated as default air pressure P here
0
The course of work of above gas tightness pick-up unit and detection principle are as follows, Fig. 4 is that the air pressure of the volumetric standard of the utility model embodiment is schemed over time, Fig. 5 is that the air pressure of the testing container of the utility model embodiment is schemed over time, with reference to Fig. 2, Fig. 4 and Fig. 5:
At first be that control module 18 control electric Proportion valves 11 are opened, solenoid valve 15 disconnects, and air pump 8 is inflated to volumetric standard 9 under the control of control module 18.The air pressure of while monitor 19 beginning monitoring standard containers 9 is situation over time, and the air pressure of drawing standard container 9 is schemed over time; The air pressure P of the first tensimeter 13 beginning monitoring standard containers 9
1, as the air pressure P of volumetric standard 9
1Near preset value P
0The time, under the control of control module 18, electric Proportion valve 11 is adjusted the airshed size, so that the air pressure P of volumetric standard 9
1Slowly reach preset value P
0
The air pressure of volumetric standard 9 reaches preset value P
0After, under the control of control module 18, electric Proportion valve 11 disconnects, solenoid valve 15 is opened, this moment 9 li of volumetric standards gas flow testing container 12, the monitor 19 air pressure situation over time that begins to monitor testing container 12 simultaneously, and the air pressure of drawing testing container 12 is schemed over time; The second tensimeter 14 begins to monitor the air pressure P of testing container 12
2Because the gas of volumetric standard 9 is reducing, and the gas of surveying testing container 12 is in increase, so P
1At decline P
2Rising, be at last equilibrium state, i.e. P
1=P
2
Work as P
1=P
2The time, under the control of control module 18, solenoid valve 15 disconnects.
Through very first time section T
1, read the value P of the first tensimeter 13
11, and read simultaneously the value P of the second tensimeter 14
21, compare P
11With P
21Size:
1) if P
11Equal P
21, judge that then test piece 12 gas tightness are good, be qualified workpiece, detect and finish;
2) if P
11More than or equal to P
21, and exceed setting range, and judge that then there be large the leakage in test piece, the alarm equipment alarm in the control module 18 detects and finishes;
3) if P
11Greater than P
21, and do not exceed setting range, and judge that then there be not large the leakage in test piece 12, test continues;
Through the second time period T
2, wherein, T
2Greater than T
1, read the second manometric value P
22And calculate testing container 12 at very first time section T
1To the second time period T
2Between pressure reduction S(S=P
21-P
22), if in the preset value scope, then judging testing container 12, S do not have slight the leakage, be qualified workpiece, if S exceeds the preset value scope, judge that then there be slight the leakage in testing container 12, testing container 12 is defective workpiece, and the alarm equipment alarm in the control module 18 detects and finishes.
According to the utility model, use electric Proportion valve 11 during inflation, so that it is more stable to be filled with the gas of volumetric standard 9, because 9 pairs of testing container 12 air feed of Application standard container, avoid the instability of air pump 8 direct air feed, and detected the inflationtime that does not need with reference to air pump 8.In addition owing to be volumetric standard 9 air feed, measuring air pressure part and official testing during inflation partly isolates by air valve, become possibility so that reduce pipeline diameter and test piece and frock gap, prior art is because with reference to air pump 8, impossible space is too narrow and small, and the ratio between the inside cavity volume V2 of the V1 of peripheral gas volume and testing container 12 is less, and measurement result is more obvious, thereby so that during little leakage, air pressure change is more remarkable.Moreover owing to be volumetric standard 9 air feed, so that detecting, loculus body impermeability becomes possibility.
With reference to Fig. 2, as a most preferred embodiment of the present utility model, in order to detect the gas that finishes 12 li of rear discharge testing containers, this gas tightness pick-up unit also comprises a vent valve 20, and vent valve is connected with testing container 12, and is connected with control module 18.In testing process, vent valve 20 is in off-state, and after detection finished, under the control of control module 18, vent valve 20 was opened, and the gas of 12 li of testing containers is discharged.
In order to guarantee in the testing process to contact well between the testing container 12 and the second tracheae 17A, impulsive force two vibration-generatings that this testing container 12 can an air-flow place testing container 12 on the test fixture 10.Fig. 3 is the structural representation of the test fixture of the utility model embodiment, please refer to Fig. 2, Fig. 3, as a preferred embodiment of the present utility model, below provide test fixture optimum structure scheme: accommodate testing container 12 on the test fixture 10, the air intake opening 23 of testing container 12 places on the test fixture 10, and air intake opening 23 is connected with the second tracheae 17A.Junction at test fixture 10 and testing container 12 is provided with the first O-ring seal 22, is provided with the second O-ring seal 21 in the inside of testing container 12, and the utility model will detect, and is exactly the gas tightness of this second O-ring seal 21.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. gas tightness pick-up unit, the gas tightness for detection of testing container is characterized in that, comprising:
Volumetric standard, inside is filled with the gas of the first pressure, with testing container by the first tracheae be connected tracheae and be connected, wherein, be provided for controlling the solenoid valve that described the first tracheae and described the second tracheae are communicated with or disconnect in described the first tracheae and described the second tracheae junction;
Be used for controlling described the first tracheae in very first time section and be communicated with described the second tracheae, described volumetric standard is inflated to described testing container, when described volumetric standard when force value between the described testing container equates, entered for the second time period; Be used for controlling described the first tracheae and the disconnection of described the second tracheae in described the second time period, and monitor respectively the control module that the pressure in described volumetric standard and the described testing container changes, described control module is connected with described solenoid valve.
2. gas tightness pick-up unit according to claim 1, it is characterized in that, comprise also that for the air pump that before described very first time section, is filled with the gas of described the first pressure to described volumetric standard described air pump is connected with described volumetric standard with the 4th tracheae by the 3rd tracheae.
3. gas tightness pick-up unit according to claim 2, it is characterized in that, be provided with in described the 3rd tracheae and the junction of described the 4th tracheae be used to controlling being communicated with or the electric Proportion valve of disconnection between described the 3rd tracheae and described the 4th tracheae, described electric Proportion valve is connected with described control module.
4. gas tightness pick-up unit according to claim 1 is characterized in that, also is included in to detect to finish the rear vent valve that is used for discharging the gas in the described testing container, and described vent valve is connected with described testing container, and is connected with described control module.
5. gas tightness pick-up unit according to claim 1, it is characterized in that, comprise that also described monitor is connected with described volumetric standard and described testing container respectively for the air pressure of drawing respectively described volumetric standard and the described testing container monitor of figure over time.
6. gas tightness pick-up unit according to claim 1 is characterized in that, described control module comprises:
The first tensimeter for the air pressure of monitoring described volumetric standard is arranged on described the first tracheae;
The second tensimeter for the air pressure of monitoring described testing container is arranged on described the second tracheae.
7. gas tightness pick-up unit according to claim 5 is characterized in that, described control module also comprises an alarm, sounds the alarm according to testing result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320257726 CN203249743U (en) | 2013-05-13 | 2013-05-13 | Gas tightness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320257726 CN203249743U (en) | 2013-05-13 | 2013-05-13 | Gas tightness detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203249743U true CN203249743U (en) | 2013-10-23 |
Family
ID=49376176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320257726 Expired - Fee Related CN203249743U (en) | 2013-05-13 | 2013-05-13 | Gas tightness detection device |
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| Country | Link |
|---|---|
| CN (1) | CN203249743U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155070A (en) * | 2013-05-13 | 2014-11-19 | 北京德尔福万源发动机管理系统有限公司 | Airtightness detecting device and method |
| CN109540408A (en) * | 2017-09-21 | 2019-03-29 | 青海时代新能源科技有限公司 | Air tightness detection method and device |
| CN110118636A (en) * | 2019-05-21 | 2019-08-13 | 佛山市爱森宝机电设备有限公司 | The airtight testboard of airbed electric air pump |
| CN111521349A (en) * | 2020-04-21 | 2020-08-11 | 博众精工科技股份有限公司 | Inflation and deflation control method, device and system, electronic equipment and medium |
| CN112098011A (en) * | 2019-06-17 | 2020-12-18 | 沅圣科技股份有限公司 | Air tightness detection system and air tightness detection method |
| CN113848023A (en) * | 2021-09-28 | 2021-12-28 | 长春弼吉尔汽车零部件有限公司 | A kind of washing pipe air tightness test bench |
| CN114018510A (en) * | 2021-11-01 | 2022-02-08 | 深圳天邦美科技有限公司 | Pressurization method of air tightness detector |
-
2013
- 2013-05-13 CN CN 201320257726 patent/CN203249743U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155070A (en) * | 2013-05-13 | 2014-11-19 | 北京德尔福万源发动机管理系统有限公司 | Airtightness detecting device and method |
| CN109540408A (en) * | 2017-09-21 | 2019-03-29 | 青海时代新能源科技有限公司 | Air tightness detection method and device |
| CN110118636A (en) * | 2019-05-21 | 2019-08-13 | 佛山市爱森宝机电设备有限公司 | The airtight testboard of airbed electric air pump |
| CN112098011A (en) * | 2019-06-17 | 2020-12-18 | 沅圣科技股份有限公司 | Air tightness detection system and air tightness detection method |
| CN111521349A (en) * | 2020-04-21 | 2020-08-11 | 博众精工科技股份有限公司 | Inflation and deflation control method, device and system, electronic equipment and medium |
| CN111521349B (en) * | 2020-04-21 | 2022-07-01 | 博众精工科技股份有限公司 | Inflation and deflation control method, device and system, electronic equipment and medium |
| CN113848023A (en) * | 2021-09-28 | 2021-12-28 | 长春弼吉尔汽车零部件有限公司 | A kind of washing pipe air tightness test bench |
| CN114018510A (en) * | 2021-11-01 | 2022-02-08 | 深圳天邦美科技有限公司 | Pressurization method of air tightness detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131023 Termination date: 20170513 |