CN204740108U - Double mode leakage detector - Google Patents
Double mode leakage detector Download PDFInfo
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- CN204740108U CN204740108U CN201520463925.XU CN201520463925U CN204740108U CN 204740108 U CN204740108 U CN 204740108U CN 201520463925 U CN201520463925 U CN 201520463925U CN 204740108 U CN204740108 U CN 204740108U
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- gas circuit
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Abstract
Double mode leakage detector, including detecting air supply, inflation valve, benchmark gas circuit and being surveyed the gas circuit, detect the air supply and be connected with the inflation valve, be connected with the benchmark gas circuit behind the inflation valve respectively and surveyed the gas circuit, benchmark gas circuit and all be connected with the balanced valve in the survey gas circuit, is surveyed and has been concatenated differential pressure sensor between the gas circuit behind the gas circuit balanced valve benchmark gas circuit, still including the flow measurement gas circuit, being connected with two flow measurement valves and a flow sensor in the flow measurement gas circuit, flow sensor is located between two flow measurement valves. This double mode leakage detector has advantages such as application scope is wide, the acquisition cost is low, the occupation of land space is little, detection efficiency height, differential pressure sensor's life can be protected and prolonged to balanced valve in benchmark gas circuit and the quilt survey gas circuit in addition, flow measurement valve in the while flow measurement gas circuit can be ensured the differential pressure mode and examine the degree of accuracy of time measuring testing result.
Description
Technical field
The utility model belongs to airtight detection technique field, is specifically related to a kind of double mode leak locator.
Background technology
Current airtight leak locator mainly comprises following two kinds: the airtight leak locator of flow-type detected for the larger workpiece of leakage quantity (discharge characteristic): source of the gas is inflated to measured object by flow sensor, detected the gas flow of measured object by flow sensor, and then obtain the leakage quantity value (flow value) of workpiece; The airtight leak locator of differential pressure type for leakage quantity detects compared with small workpiece: source of the gas is first to measured object and primary standard substance (primary standard substance is the known non-defective unit do not leaked) inflation, then inflation is stopped when detection, primary standard substance and measured object is made to form closed cavity respectively, by differential pressure pick-up between the two, detected the micro leakage of measured object by differential pressure change.
Mainly there is following shortcoming in existing airtight leak locator: equipment limitation is strong: cannot detect the workpiece (impermeability when such as valve cuts out and air mass flow when opening) with two or more leak condition by single device; Equipment purchasing cost is high: when needs detect discharge characteristic and impermeability, need procuring equipment respectively, add acquisition cost; Detection efficiency is low: because flow and air-leakage test need to have been come by two leak locators, add the extra duration of runs, have impact on detection efficiency; The excessive workpiece of leakage quantity can damage the life-span of differential pressure pick-up: the workpiece that leakage quantity is less, cannot use flow-type airtight leak locator assay approval product, can only use the airtight leak locator of differential pressure type.But wherein leakage quantity large workpiece, when its leakage quantity size cannot be learnt in advance, use the airtight leak locator detection of differential pressure type can make differential pressure pick-up outrange, long-term repeated detection can damage the life-span of differential pressure pick-up, and also cannot measure leakage rate accurately when the airtight leak locator of the excessive workpiece differential pressure type of leakage quantity detects.
Utility model content
For above-mentioned defect, the utility model aims to provide a kind of double mode leak locator.
The technical scheme of this double mode leak locator is achieved in that
Described double mode leak locator, comprise and detect source of the gas, gas filling valve, benchmark gas circuit and tested gas circuit, detect source of the gas to be connected with gas filling valve, benchmark gas circuit and tested gas circuit is connected to after gas filling valve, all be connected with equalizing valve in benchmark gas circuit and tested gas circuit, between the gas circuit after the gas circuit after benchmark gas circuit equalizing valve and tested gas circuit equalizing valve, be serially connected with differential pressure pick-up;
Described double mode leak locator also comprises flow detection gas circuit, flow detection gas circuit one end is connected to be detected between source of the gas and gas filling valve, the other end is connected in the gas circuit after tested gas circuit equalizing valve, be connected with two flow rate measurement valves and a flow sensor in flow detection gas circuit, flow sensor is between two flow rate measurement valves; Also be provided with exhaust gas circuit after described gas filling valve, in exhaust gas circuit, be provided with vent valve and exhausr port successively;
Described double mode leak locator also comprises control module, and unlatching closure state, the control module of control module control gas filling valve, equalizing valve, flow rate measurement valve and vent valve are also electrically connected with differential pressure pick-up, flow sensor.
Preferably, described gas filling valve, equalizing valve, flow rate measurement valve are 2/2-way normally close valve, and vent valve is 2/2-way normally open valve.
Further, this double mode leak locator detects between source of the gas and gas filling valve and is connected with the first pressure transducer, and be connected with the second pressure transducer in tested gas circuit, the first pressure transducer and the second pressure transducer are all electrically connected with control module.
Further, this double mode leak locator also comprises driving source of the gas and four solenoid valves, and be connected with four roads after driving source of the gas and drive gas circuits, every road drives in gas circuit and is connected with a solenoid valve, and control module is all electrically connected with four solenoid valves;
Described gas filling valve, equalizing valve, flow rate measurement valve and vent valve are Pneumatic valve, and four roads drive the solenoid valve one_to_one corresponding in gas circuit, are connected respectively with gas filling valve, two equalizing valves, two flow rate measurement valves with the drive end of vent valve.
Double mode leak locator provided by the utility model, optimize on the basis of existing technology and improve, there is provided differential pressure, flow double mode detection, first flow rate mode detection is carried out to measured object, when judging that measured object belongs to differential pressure mode detection object through flow rate mode detection, again differential pressure mode detection is carried out to it, thus achieve an equipment, the testing requirement of the larger workpiece flow rate characteristic of leakage quantity can be met, also can meet the testing requirement of leakage quantity compared with small workpiece, have applied widely, acquisition cost is low, take up an area little, the detection efficiency advantages of higher in space; In addition, when carrying out flow rate mode to measured object and detecting, the equalizing valve in benchmark gas circuit and tested gas circuit is closed, and the situation avoiding differential pressure pick-up outrange occurs, and protects and extend the serviceable life of differential pressure pick-up; Simultaneously, when carrying out differential pressure mode detection to measured object, in flow detection gas circuit, the flow rate measurement valve at flow sensor two ends is closed, and plays cut-off effect, when ensure that differential pressure mode detection, differential pressure pick-up can not be subject to the interference of front-end detection source of the gas, improves testing result accuracy.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is double mode leak locator connection diagram described in the utility model.
Description of reference numerals:
In figure: 1. drive source of the gas, 2. detect source of the gas, 3. solenoid valve, 4. gas filling valve, 5. equalizing valve, 6. flow rate measurement valve, 7. differential pressure pick-up, 8. flow sensor, 9. the first pressure transducer, 10. the second pressure transducer, 11. vent valves, 12. exhausr ports, 13. control modules, 14. measured objects, 15. primary standard substances;
In figure, in order to drive, source of the gas gas circuit, solid line are detection source of the gas gas circuit to dotted line, dot-and-dash line is circuit.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
Double mode leak locator described in the utility model, as shown in Figure 1, comprise and detect source of the gas 2, gas filling valve 4, benchmark gas circuit and tested gas circuit, detect source of the gas 2 to be connected with gas filling valve 4, benchmark gas circuit and tested gas circuit is connected to after gas filling valve 4, all be connected with equalizing valve 5 in benchmark gas circuit and tested gas circuit, between the gas circuit after the gas circuit after benchmark gas circuit equalizing valve 5 and tested gas circuit equalizing valve 5, be serially connected with differential pressure pick-up 7;
Described double mode leak locator also comprises flow detection gas circuit, flow detection gas circuit one end is connected to be detected between source of the gas 2 and gas filling valve 4, the other end is connected in the gas circuit after tested gas circuit equalizing valve 5, be connected with two flow rate measurement valves 6 and a flow sensor 8 in flow detection gas circuit, flow sensor 8 is between two flow rate measurement valves 6; Also be provided with exhaust gas circuit after described gas filling valve 4, in exhaust gas circuit, be provided with vent valve 11 and exhausr port 12 successively;
Described double mode leak locator also comprises control module 13, and control module 13 controls the unlatching closure state of gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 and vent valve 11, control module 13 is also electrically connected with differential pressure pick-up 7, flow sensor 8.
Preferably, described gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 are 2/2-way normally close valve, and vent valve 11 is 2/2-way normally open valve.It may be noted that time, the valve which kind of form gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 and vent valve 11 are specially does not need unique restriction, it is opened closure state and controls primarily of control module 13, only need preset in the program module of control module 13, make the unlatching closure state between them can complete the work of this double mode leak locator.
Further, this double mode leak locator detects between source of the gas 2 and gas filling valve 4 and is connected with the first pressure transducer 9, the second pressure transducer 10 is connected with in tested gas circuit, first pressure transducer 9 and the second pressure transducer 10 are all electrically connected with control module 13, first pressure transducer 9 detects the force value of source of the gas 2 for monitoring, the second pressure transducer 10 is for monitoring the working pressure of this double mode leak locator.
Further, this double mode leak locator is used in bubble-tight detection, in work process, the various valves be directly connected in benchmark gas circuit, tested gas circuit, flow detection gas circuit can because the reasons such as heating be to the generation such as air pressure, temperature effect in gas circuit, and then have influence on the accuracy of testing result, therefore, this double mode leak locator also comprises driving source of the gas 1 and four solenoid valves 3, be connected with four roads after driving source of the gas 1 and drive gas circuit, every road drives in gas circuit and is connected with a solenoid valve 3, and control module 13 is all electrically connected with four solenoid valves 3;
Described gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 and vent valve 11 are Pneumatic valve, and four roads drive solenoid valve 3 one_to_one corresponding in gas circuit, are connected respectively with gas filling valve 4, two equalizing valves 5, two flow rate measurement valves 6 with the drive end of vent valve 11.
The detection method of double mode leak locator described in the utility model, it comprises following basic step:
Step one: primary standard substance 15 is connected to benchmark gas circuit tail end, measured object 14 is connected to tested gas circuit tail end, first control module 13 controls gas filling valve 4, equalizing valve 5 is opened, vent valve 11 closes, detection source of the gas 2 pairs of measured objects 14 and primary standard substance 15 are inflated, after the inflationtime preset, control module 13 controls gas filling valve 4 and closes, and stops inflation;
Step 2: control module 13 controls equalizing valve 5 and closes, flow rate measurement valve 6 is opened, detect source of the gas 2 within the flow detection time of presetting, inflated measured object 14 by flow detection gas circuit, the flow signal detected is delivered to control module 13 by flow sensor 8, judges the flow flowing through measured object 14, control module 13 controls flow rate measurement valve 6 and closes, if result exceeds predetermined threshold value, then this flow results is measured value, skips to step 5; Otherwise continuation next step;
Step 3: control module 13 controls equalizing valve 5 and opens, in the equilibration time preset, measured object 14 and primary standard substance 15 carry out pressure equilibrium;
Step 4: control module 13 controls equalizing valve 5 and closes, and the differential pressure signal detected is delivered to control module 13 by differential pressure pick-up 7 within the differential pressure measuring time of presetting, and judges the differential pressure measuring leakage rate of measured object 14;
Step 5: control module 13 controls equalizing valve 5, vent valve 11 is opened, in the evacuation time preset, the residual gas in measured object 14 and primary standard substance 15 is discharged, and testing result is shown by control module 13, after exhaust terminates, control module 13 controls equalizing valve 5 and closes.
Corresponding with above-mentioned double mode leak locator product, further, in the detection method of this double mode leak locator, also comprise following preferred steps:
After described step one completes, keep in monitoring time at the pressure preset, control module 13 judges the pressure signal measured by the second pressure transducer 10, if force value is lower than predetermined threshold value, then skip to step 5, monitoring result is shown as super large and leaks, otherwise continues step 2.
Corresponding with above-mentioned double mode leak locator product, further, in the detection method of this double mode leak locator, control module 13 is by controlling the solenoid valve 3 that connect corresponding to gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 and vent valve 11 control end, and then controls the unlatching closure state of gas filling valve 4, equalizing valve 5, flow rate measurement valve 6 and vent valve 11.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a double mode leak locator, it is characterized in that: it comprises detection source of the gas (2), gas filling valve (4), benchmark gas circuit and tested gas circuit, detect source of the gas (2) to be connected with gas filling valve (4), benchmark gas circuit and tested gas circuit is connected to after gas filling valve (4), all be connected with equalizing valve (5) in benchmark gas circuit and tested gas circuit, between the gas circuit after the gas circuit after benchmark gas circuit equalizing valve (5) and tested gas circuit equalizing valve (5), be serially connected with differential pressure pick-up (7);
Described double mode leak locator also comprises flow detection gas circuit, flow detection gas circuit one end is connected to be detected between source of the gas (2) and gas filling valve (4), the other end is connected in the gas circuit after tested gas circuit equalizing valve (5), be connected with two flow rate measurement valves (6) and a flow sensor (8) in flow detection gas circuit, flow sensor (8) is positioned between two flow rate measurement valves (6); Described gas filling valve is also provided with exhaust gas circuit after (4), is provided with vent valve (11) and exhausr port (12) successively in exhaust gas circuit;
Described double mode leak locator also comprises control module (13), and unlatching closure state, the control module (13) of control module (13) control gas filling valve (4), equalizing valve (5), flow rate measurement valve (6) and vent valve (11) are also electrically connected with differential pressure pick-up (7), flow sensor (8).
2. double mode leak locator according to claim 1, it is characterized in that: described gas filling valve (4), equalizing valve (5), flow rate measurement valve (6) are 2/2-way normally close valve, vent valve (11) is 2/2-way normally open valve.
3. double mode leak locator according to claim 1 and 2, it is characterized in that: between described detection source of the gas (2) and gas filling valve (4), be connected with the first pressure transducer (9), be connected with the second pressure transducer (10) in tested gas circuit, the first pressure transducer (9) and the second pressure transducer (10) are all electrically connected with control module (13).
4. double mode leak locator according to claim 1, it is characterized in that: described double mode leak locator also comprises driving source of the gas (1) and four solenoid valves (3), be connected with four roads after driving source of the gas (1) and drive gas circuit, every road drives in gas circuit and is connected with a solenoid valve (3), and control module (13) is all electrically connected with four solenoid valves (3);
Described gas filling valve (4), equalizing valve (5), flow rate measurement valve (6) and vent valve (11) are Pneumatic valve, four roads drive solenoid valve (3) one_to_one corresponding in gas circuit, are connected respectively with gas filling valve (4), two equalizing valves (5), two flow rate measurement valves (6) with the drive end of vent valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520463925.XU CN204740108U (en) | 2015-07-01 | 2015-07-01 | Double mode leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520463925.XU CN204740108U (en) | 2015-07-01 | 2015-07-01 | Double mode leakage detector |
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| Publication Number | Publication Date |
|---|---|
| CN204740108U true CN204740108U (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520463925.XU Expired - Fee Related CN204740108U (en) | 2015-07-01 | 2015-07-01 | Double mode leakage detector |
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| CN (1) | CN204740108U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115678A (en) * | 2015-07-01 | 2015-12-02 | 天津博益气动股份有限公司 | Double-mode leak detector and detection method |
| CN114235302A (en) * | 2021-11-16 | 2022-03-25 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
-
2015
- 2015-07-01 CN CN201520463925.XU patent/CN204740108U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115678A (en) * | 2015-07-01 | 2015-12-02 | 天津博益气动股份有限公司 | Double-mode leak detector and detection method |
| CN114235302A (en) * | 2021-11-16 | 2022-03-25 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
| CN114235302B (en) * | 2021-11-16 | 2024-02-06 | 北京谊安医疗系统股份有限公司 | Method for detecting leakage amount of ventilation loop |
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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: 20151104 Termination date: 20170701 |