CN211651945U - Leakage detecting system for large container part - Google Patents
Leakage detecting system for large container part Download PDFInfo
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- CN211651945U CN211651945U CN201922369581.7U CN201922369581U CN211651945U CN 211651945 U CN211651945 U CN 211651945U CN 201922369581 U CN201922369581 U CN 201922369581U CN 211651945 U CN211651945 U CN 211651945U
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Abstract
The utility model discloses a large container part leak hunting system, including the detection device who is used for placing the large container part that is detected, be connected with detection device and for detection device provides the vacuum acquisition system in vacuum, be connected with detection device be used for catching the leak detector who reveals the helium, the pipe valve system of all being connected with large container part and detection device, connecting pipe valve system is used for providing the helium gas pitcher of helium for large container part to and the standard small opening that is connected with detection device and leak detector respectively during detection device and leak detector calibration. The utility model discloses a detecting tank comprises a detection section of thick bamboo at least, and detecting tank canThe utility model discloses be provided with the strutting arrangement who is convenient for detection device to remove in the bottom that detects the jar, in addition, adopt this leak hunting system to leak hunting have the cycle shorter, the precision is higher, advantages such as stable performance, sensitivity height, can be less than 5 × 10 to the gas leakage rate‑12Pa·m3The large vessel part of/s was leak tested.
Description
Technical Field
The utility model relates to a large container part detects, specifically relates to a large container part leak hunting system.
Background
In a hydrogen isotope engineering technology research platform, during the construction of large systems such as a hydrogen energy, nuclear fission and fusion energy medium-heavy water tritium extraction, large-scale hydrogen isotope separation, a tritium-involved comprehensive experiment platform and the like, the vacuum and pressure leak detection of a large number of pressure system devices and vacuum system components is involved, so that the occurrence of accidents is avoided, the safe use of experimental parts is ensured, how to leak the large sealed container and the system is reduced, the energy consumption is reduced, and the focus of attention of scientific researchers is formed. The devices such as the parts of the equipment are large in size, a simple leak detection method cannot be realized, and a helium mass spectrometer leak detection device which is large in size, convenient to move and convenient for high-vacuum leak detection is needed.
At present, helium leak detection of large container parts is not only limited to vacuum application, but also widely popularized in other industries, including electronic power industry, semiconductor industry, pharmaceutical industry, automobile industry, nuclear technology, aerospace, food and the like, and a helium leak detection device and a helium leak detection method thereof for large container parts are urgently needed in the fields of the industries. A container with the size of more than one cubic meter is called as a large container, a mature leak detection method does not exist for the large container at present, and common leak detection methods comprise a soap bubble method, a pressure drop method, a halogen method, an ammonia leak detection method, a composite paint color development leak detection method, a helium mass spectrum leak detection method and the like. Soap bubble method is simple, convenient, economical, but has low sensitivity, and the method is used for checking 10-5Not only for leaks below mbar.l/sHigher pressures are applied and it takes a long time to carefully observe the bubble formation, thus being labor intensive and more difficult if the large container parts to be inspected are large, usually as a means of gross inspection. The positive pressure drop method can detect the leakage rate of more than 1mbar.l/s, and the vacuum pressure drop method can be used for evaluating the leakage rate, but the method evaluates not only the leakage but also the outgassing. And, if the leak rate is small (<10-4mbar.l/s) which is observed under a rough vacuum and which takes a long time, but which is affected by outgassing when observed under a medium vacuum. The sensitivity of the halogen method can reach 10- 6mbar.l/s, but is generally undesirable because sensitive components are susceptible to poisoning. The real standard leak detection sensitivity of the ammonia leak detection method reaches 10-7mbar.l/s, has the advantages of high speed, accurate positioning, economy and the like, and is applied in many places. However, the use of ammonia is limited due to its irritation to humans, its corrosiveness to certain metals, and the problem of emission of large quantities of ammonia.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that exists among the prior art, the utility model provides a large container part leak hunting system.
In order to achieve the above object, the utility model adopts the following technical scheme:
a large container part leak detection system comprises a detection device used for placing a large container part to be detected, a vacuum acquisition system connected with the detection device and providing vacuum for the detection device, a leak detector connected with the detection device, a pipe valve system connected with the detection device and the large container part, a helium tank connected with the pipe valve system and used for providing helium gas for the large container part, and a standard leak hole respectively connected with the detection device and the leak detector during calibration of the detection device and the leak detector;
the detection device comprises a detection tank for placing a large container component to be detected, cover plates which are arranged at two ends of the detection tank and used for sealing the detection tank, a first interface arranged on the cover plate at one end of the detection tank, a second interface arranged on the cover plate at the other end of the detection tank, a fourth interface arranged on the detection tank and used for connecting a standard leak hole, a pressure gauge arranged on the detection tank and used for reacting the pressure in the detection tank, a vacuum gauge arranged on the detection tank and used for reacting the vacuum degree in the detection tank, a first supporting device arranged at the bottom of the detection tank, and a second support connected to the adjacent first supporting device and used for fixing the first supporting device, wherein when the detection tank extracts vacuum, a vacuum acquisition system is connected with the second interface or the first interface, and a leak detector is connected with the second interface or the first interface;
further, the detection tank comprises at least one detection cylinder which is in a cylindrical shape, when the detection cylinder is one, the cover plate is connected to the two ends of the detection cylinder, when the detection cylinder is multiple, the detection cylinder is coaxially connected in sequence from end to end and communicated, and the cover plate is respectively connected to the head end of the first detection cylinder and the tail end of the last detection cylinder.
Furthermore, when a plurality of detection cylinders are arranged, the first support devices adjacent to the connection part of the detection cylinders are connected with first supports for assisting the alignment of the connected detection cylinders.
Furthermore, the detection device also comprises support plates arranged at two ends of the detection tank, a support rod arranged on the support plates and used for supporting the cover plate, and a second support device arranged on the support plates below the support plates.
Further, the first supporting device comprises a supporting column connected with the detection tank and a universal caster which is arranged on the supporting column and used for adjusting the height and fixing, wherein the first supporting device and the second supporting device are identical in structure, and the supporting column in the second supporting device is connected with the supporting plate.
Furthermore, a standard leak valve used for isolating the external influence on the detection device and the leak detector is arranged on the pipeline of the standard leak.
Further, the vacuum acquisition system comprises a dry pump for pumping the detection tank below 10Pa to provide main power, and a molecular pump for pumping the detection tank to medium vacuum or high vacuum to provide main power.
Furthermore, a third interface connected with a standard leak hole or a vacuum acquisition system is arranged at the top of the leak detector.
Furthermore, a first valve is arranged on a pipeline connected with the helium tank and the pipe valve system, a second valve is arranged on a pipeline connected with the pipe valve system and the detection device, a leak detection valve is arranged on a pipeline connected with the detection device and the leak detector, and a third valve is arranged on a pipeline connected with the vacuum acquisition system and the detection device.
Compared with the prior art, the utility model discloses the following beneficial effect newly has:
(1) the utility model discloses newly set up and be connected with height-adjusting and fixed universal castor on the support column that detects the tank bottoms portion, made things convenient for detection device's removal.
(2) The utility model discloses new leak hunting system can carry out leak hunting to pressure vessel, vacuum vessel, the utility model discloses newly-known leak hunting system can detect that the gas leakage rate is less than 5 × 10-12Pa·m3The leakage detection system has the advantages of short period, high precision, stable performance, high sensitivity and the like. The method has important significance for system operation and daily maintenance of technical research platforms in various industries in various fields.
(3) The utility model discloses a new vacuum acquisition system is vacuum dry pump and molecular pump used alternately, the utility model discloses new earlier with the dry pump to carry out the evacuation to the detection jar in the detection device, when the reading of the vacuum gauge in the detection jar is less than 10Pa replace the dry pump with the molecular pump, until will detect jar take out to medium vacuum or high vacuum, dry pump and molecular pump used alternately have avoided the loss of pump to prolong the life of pump; in addition, the molecular pump is an oil-free and very clean vacuum pump, and the rotation speed of the molecular pump is stable, so that the air leakage rate can be determined around the lowest value which can be detected.
(4) The utility model discloses newly in detect jar comprises at least one detection section of thick bamboo, can carry out this detection device of random equipment according to the size that is detected the big container part.
(5) The utility model discloses new every detection jar all is provided with vacuum gauge and pressure change, through the record of vacuum gauge and manometer to pressure change in the detection device, judgement that can be accurate detects the dressThe sealing performance of the device, the vacuum degree of the novel detection device of the utility model can reach below 0.1Pa, and the leakage detection background can reach 10-12Pa·m3/s。
Drawings
Fig. 1 is a schematic view of the new structure of the present invention.
FIG. 2 is a schematic view of a tube valve system.
Wherein, the names corresponding to the reference numbers are:
1-a first support, 2-a second support, 3-a universal caster, 4-a first interface, 5-a cover plate, 6-a vacuum gauge, 7-a pressure gauge, 8-a test tank, 9-a vacuum caliper screw, 10-a second interface, 11-a support rod, 12-a support column, 13-a molecular pump, 14-a dry pump, 15-a leak detector, 16-a standard leak hole, 17-a standard leak hole valve, 18-a large container part, 19-a helium tank, 20-a pipe valve system, 21-a test device, 22-a vacuum acquisition system, 23-a second support device, 24-a test cylinder, 25-a fourth interface, 26-a first support device, 27-a support plate, 28-a third interface, 29-a first valve, 30-second valve, 31-leak detection valve, 32-third valve, 201-vacuum pump, 202-flow controller, 203-manual valve, 204-vacuum pump stop indication, 205-vacuum pump start indication, 206-pressure data collector, 207-vacuum display secondary meter, 208-pressure display meter, 209-power switch button, 2010-pressure sensor, 2011-vacuum meter, 2012-pipeline, 2013 control circuit board.
Detailed Description
The novel features of this invention will be understood from the following description and examples, which are given by way of illustration and not by way of limitation.
Examples
As shown in fig. 1, the present embodiment discloses a leak detection system for large container components, which comprises a detection device 21, a vacuum acquisition system 22, a leak detector 15, a pipe valve system 20, a helium tank 19 and a standard leak hole 16. During leak detection, the detection device is connected with the vacuum acquisition system and provides vacuum for the detection device, the leak detector for capturing helium leakage of the large container component is connected with the detection device, the pipe valve system is connected with the large container component 18 and the detection device, and the helium tank is connected with the pipe valve system.
When detection device and leak detector calibration, be connected with standard small opening respectively during detection device and leak detector, for the convenience of operation, be provided with on the pipeline of standard small opening and cut off external standard small opening valve 17 to detection device and leak detector influence.
The detection device comprises a detection tank 8, a cover plate 5, a first interface 4, a second interface 10, a fourth interface 25, a pressure gauge 7, a vacuum gauge 6, a first support device 26 and a second support 2; the first support means comprises a support post 12, a castor wheel 3. Wherein, the apron setting is used for sealed detection jar at the both ends that detect the jar, first interface setting is on the apron that detects jar one end, the second interface setting is on the apron that detects the jar other end, the fourth interface setting is on detecting the jar, manometer and vacuum gauge set up on detecting the jar, support post one end among the first strutting arrangement is connected in detecting the jar bottom, universal castor sets up at the other end of support post and contacts with ground, second leg joint is on adjacent first strutting arrangement. The detection tank consists of at least one detection cylinder 24, and when the detection tank consists of one detection cylinder 24, the cover plates are connected to the two ends of the detection cylinder; when the detection tank consists of a plurality of detection cylinders, the detection cylinders are coaxially and sequentially connected end to end and communicated, the detection cylinders are connected by vacuum caliper screws 9, and the cover plate is connected to the head end of the first detection cylinder and the tail end of the last detection cylinder; when the detection tank is composed of a plurality of detection cylinders, the first support device adjacent to the connection part of the detection cylinders is connected with a first support 1 for assisting the alignment and the alignment of the connected detection cylinders.
Specifically, when the detection tank is vacuumized, and the vacuum acquisition system is connected with the first interface, the leak detector is connected with the second interface; or when the vacuum acquisition system is connected with the second interface, the leak detector is connected with the first interface; the pressure gauge and the vacuum gauge react to the pressure in the detection tank. When the detection device is calibrated, the fourth interface is connected with the standard leak hole; the first support connected to the adjacent first support device at the connected detection cylinder is a second support connected to the first support device instead of the first support device.
For the convenience of the detection device, support plates 27 are further provided at both ends of the detection tank, support rods 11 for supporting the cover plate are provided on the support plates, and a second support device 23 identical to the first support device is provided below the support plates, wherein the support columns of the second support device are connected to the support plates.
The top of the leak detector is provided with a third interface 28, and the third interface is connected with a standard leak hole when the leak detector is calibrated; when the leak detector extracts vacuum, the third interface is connected with the vacuum acquisition system; and when a suction gun leak detection method is adopted, the third interface is connected with a suction gun. For the convenience of operation, a leak detection valve 31 is provided on a pipe connecting the leak detector and the detection device.
The vacuum system acquisition system comprises a dry pump 14 and a molecular pump 13, specifically, the dry pump is mainly used for pumping the detection tank to below 10Pa, the molecular pump is mainly used for pumping the detection tank to medium vacuum or high vacuum, the medium vacuum is 10 Pa-1 Pa, the high vacuum is less than 1Pa, and in addition, the vacuum system acquisition system also comprises a pipe valve system playing an auxiliary role in the vacuum pumping process of the detection tank. Specifically, the molecular pump is used after the dry pump when the detection tank is evacuated. For ease of operation, a third valve 32 is provided in the line connecting the vacuum acquisition system to the detection device.
The pipe valve system comprises a vacuum pump 201, a flow controller 202, a manual valve 203, a vacuum pump stop instruction 204, a vacuum pump start instruction 205, a pressure data collector 206, a vacuum display secondary meter 207, a pressure display meter 208, a power switch button 209, a pressure sensor 2010, a vacuum meter 2011, a pipeline 2012 and a control circuit board 2013. The pipe valve system comprises 16-way pipe valve lines which are divided into a left group and a right group, wherein the two groups of pipe valves can be respectively and independently controlled, can be randomly combined, and can also be simultaneously combined for use. Two groups of pressure detecting instruments, two groups of vacuum detecting instruments, two groups of flow control instruments and one group of pressure display instrument are configured, and the states of the gas in each pipeline can be flexibly displayed, detected and controlled. The bottom is provided with a vacuum pump for acquiring vacuum by a pipeline system. The panel is integrated with a vacuum display secondary instrument, a pressure data acquisition display instrument and a pressure display instrument, and monitoring and storage of process data can be realized. The panel integrates a switch power supply button, and the vacuum pump starts and stops displaying indication, so that the working and running conditions can be observed conveniently.
The pipe valve system can be used for various leak detection methods, such as a pressure drop leak detection method, a vacuum pressure drop leak detection method, a soap bubble leak detection method, a helium pressure vacuum chamber leak detection method, a spray gun leak detection method and a suction gun leak detection method. In addition, the pipe valve system can be used as a multifunctional gas supply and distribution device and can provide various gas paths and gas sources simultaneously. The gas flow control can be carried out by utilizing a flow control meter of the pipe valve system, and the gas proportion can be adjusted. The pipe valve system is also a high-pressure resistant system, all valve pipe fittings have high-pressure resistant functions, and the pressure resistance can reach 60 MPa. The pipe valve system can also carry out inflation and deflation tests on the large container part.
In the embodiment, a pipe valve route in the pipe valve system is connected with the detection tank, at the moment, a vacuum pump in the pipe valve system is used as an auxiliary pump in the vacuumizing process of the detection tank, and meanwhile, the pipe valve route is used for detecting that the internal pressure of the tank is released to the atmospheric pressure, so that a cover plate can be conveniently opened to take out a large container part; another tube valve route in the tube valve system is connected with the large container component through the detection tank and used for providing helium gas for the large container component. For convenience of operation, a first valve 29 is provided on the pipeline connecting the helium tank and the tubing valve system, and a second valve 30 is provided on the pipeline connecting the tubing valve system and the detection device.
On the basis of the leak detection system described above, this embodiment further illustrates a leak detection method using the leak detection system, which is specifically as follows:
the first step is as follows: the method for detecting the leakage of the large container part by adopting a gun suction method comprises the following steps:
step S1: the large container part is cleaned and dried.
Step S2: and (4) checking the sensitivity, the reaction time, the system local and the pipeline sealing connection of the leak detection system of the leak detector.
Step S3: and (3) checking a drawing of the large container part to know the position of the large container, which is possibly leaked, and indicating the positive pressure resistance and the vacuum resistance of the large container part according to the normal use working condition, the pressure resistance limit and the design parameters during design of the large container part.
Step S4: vacuumizing the interior of the large container part, and filling helium into the large container part, wherein the pressure and the concentration of the helium are not too high easily, the pressure in the large container part is lower than a gauge pressure, and the concentration of the helium in the large container part is 10% -30%; the leakage detection device can avoid the large waste and serious environmental pollution caused by the leakage of a large amount of helium from a large container part when a large leakage hole exists, and can bring large interference to the leakage detection work.
Step S5: adjusting the leak detector to a suction gun mode, connecting a suction gun with a third interface, performing leak detection on the large container part filled with helium in the step S4 by using the suction gun, and determining the specific position of large gas leakage of the large container part through the cooperation of the suction gun and the leak detector; when the leak detector indicates that a leak exists and the leak hole does not correspond to the position of the suction nozzle of the suction gun, the moving speed and the distance of the suction gun are reduced in the range, and the accurate position of the leak hole is determined by repeatedly searching. When the suction gun leak detection method is used for detection, a helium cover (usually a plastic film cover) is usually adopted to wrap a suspicious part of a large container component or the whole large container component, a suction gun connected with a leak detector is inserted into the cover to wait for certain reaction time, and a stable leak rate value read by the leak detector is observed, so that the whole leak rate range of the large container component can be preliminarily judged. Then taking off the helium cover, and using a suction gun to sequentially detect the leakage of the suspicious part of the large container part; the suction gun leakage detection usually adopts the principle that the moving speed is slow from bottom to top and from far to near; in addition, the suction gun is preferably about 1cm away from the surface of the large container part, the sensitivity is reduced when the suction gun is too far away, the filter element of the suction gun is easily blocked when dust attached to the surface of the large container part to be detected is easily sucked when the suction gun is too close, and a short suction gun hose, such as a metal hose or a plastic pipe, is selected for the suction gun for shortening the reaction time.
Step S6: and (3) recovering helium in the large container part after leak detection of the large container part by using a suction gun leak detection method, and placing the suction gun in air which is not polluted by the helium.
Step S7: and (4) performing air leakage repair on the large container part of which the specific large air leakage position is determined in the step (S5).
Step S8: the large container member repaired at step S7 is subjected to leak detection by filling high-concentration high-pressure helium gas (helium gas concentration of the large container member is equal to or greater than 50%). Adopt the gun leak hunting method earlier to inspect, adopt immediately when the suspected leak source can't be examined to the gun leak hunting method the utility model discloses in the leak hunting method, the helium that fills in the large container part this moment is retrieved then with large container part evacuation.
The second step is that: adopt the utility model discloses a leak hunting system carries out the leak hunting to the large container part, specifically includes following steps:
step B1: connecting a standard leak hole on the third interface, then opening the leak detector and calibrating the leak detector, wherein the calibration steps are as follows:
step A1: closing the standard leak valve, and reading out the local noise I indicated by the output of the leak detectornAnd background I0。
Step A2: opening the standard leak valve, and reading out the stable signal value I output and indicated by the leak detector1。
Step A3: closing the standard leak valve to restore the output indication of the instrument to the background value I0。
Step A4: minimum detectable leak rate Q of instrumentmin：
Wherein Q isminIs the minimum detectable leak rate, Q, of the instrument0Is the known leak rate of the standard leak hole.
Step B2: on the basis of leak detector calibration, a large container part is placed into a detection tank, then the large container part is connected with another pipeline valve route in a pipeline valve system, a helium tank is connected to the pipeline valve route, and sealing between the pipeline valve route and the detection tank is well done; meanwhile, the detection tank is connected with a pipe valve line, a leak detector and a vacuum acquisition system in the pipe valve system, a third valve is opened, a dry pump of the vacuum acquisition system is used as main power for vacuumizing the detection tank, a vacuum pump in the pipe valve system is used as auxiliary power, when the reading of a vacuum meter is smaller than 10pa, the dry pump is replaced by a molecular pump in the vacuum acquisition system to be used as main power for vacuumizing the detection tank to medium vacuum or high vacuum, and the vacuum pump in the pipe valve system is still used as auxiliary power.
Step B3: the leak detector was turned on and adjusted to vacuum mode. And connecting a standard leak hole to a fourth interface on the detection tank, adjusting the leak detector and the detection system in a leak detection state, and calibrating the effective minimum detectable leak rate of the leak detection system in the detection state, wherein the calibrating step is consistent with the calibrating step of the leak detector in the step B1.
Step B4: removing or closing a standard leak hole connected to the fourth interface, opening a leak detection valve to communicate the vacuumized detection tank with a leak detector vacuumized to the limit vacuum, and adjusting the leak detector to a leak detection working state after the detection tank reaches a working vacuum degree; simultaneously, the vacuum degree and the background value in the detection tank are recorded according to the vacuum meter and the pressure meter, and when the vacuum degree is below 0.1Pa, the leakage rate background of the detection tank can reach 10-12Pa·m3/s。
Step B5: after the steps B1-B4 are completed, the first valve, the second valve and the helium tank are opened, the helium tank, the other pipeline valve line in the pipeline valve system and the large container part are communicated, helium is flushed into the large container part, and the helium flushing is stopped until the concentration of the helium in the large container part reaches 50%. At the moment, if helium leaks from the large container part, the leaked helium enters the leak detector from the detection tank, the output indication value of the leak detector is increased, the leak rate can be detected by the leak detector, and the stable value I of the output indication value is recorded after the output indication of the leak detector is stable2Then (I)2-I0) The value is the leak signal generated by the large container part. The leak rate measured by the leak detector is the overall leak rate of the large container component, so that the leak rate Q of the large container component can be calculated:
step B6: when the vacuum leak detection is finished, the leak detector is re-calibrated according to the calibration step of the leak detector in the step B1, and when the re-calibrated minimum detectable leak rate Q is reachedminUp to the minimum detectable leakage rate QminAbove 65%, the leak detection apparatus should be cleaned, repaired or recalibrated and the large vessel components re-tested.
Step B7: and after the leak detector is calibrated again, closing a molecular pump set in the leak detector and the vacuum acquisition system, releasing the pressure in the detection tank through a pipe valve line in the pipe valve system until the pressure in the detection tank reaches normal pressure, opening a cover plate to take out the large container component, and finishing leak detection.
The above embodiment is only one of the new preferred embodiments of the present invention, and should not be used to limit the new protection scope of the present invention, but all the insubstantial changes or modifications made in the new main design concept and spirit of the present invention, and the technical problems solved by the present invention are still consistent with the present invention, and all should be included in the new protection scope of the present invention.
Claims (9)
1. A large container member helium leak detection system, comprising a detection device (21) for placing a large container member (18) to be detected, a vacuum pickup system (22) connected to said detection device (21) and supplying a vacuum to said detection device (21), a leak detector (15) connected to said detection device (21), a tube valve system (20) connected to both said detection device (21) and large container member (18), a helium tank (19) connected to said tube valve system (20) and used for supplying helium gas to the large container member, and a standard leak hole (16) connected to said detection device (21) and leak detector (15) respectively at the time of calibration of said detection device (21) and leak detector (15);
the detection device (21) comprises a detection tank (8) for placing a large container component (18) to be detected, cover plates (5) which are arranged at two ends of the detection tank (8) and used for sealing the detection tank, a first interface (4) arranged on the cover plate (5) at one end of the detection tank, a second interface (10) arranged on the cover plate (5) at the other end of the detection tank, a fourth interface (25) which is arranged on the detection tank (8) and used for connecting a standard leak hole (16), a pressure gauge (7) which is arranged on the detection tank (8) and used for reacting the pressure in the detection tank (8), a vacuum gauge (6) which is arranged on the detection tank (8) and used for reacting the vacuum degree in the detection tank (8), a first supporting device (26) arranged at the bottom of the detection tank (8), and a second support (2) which is connected to the adjacent first supporting device (26) and used for fixing the first supporting device (26), when the detection tank (8) is vacuumized, the vacuum acquisition system (22) is connected with the second interface (10) or the first interface (4), and the leak detector (15) is connected with the second interface (10) or the first interface (4).
2. The helium leak detection system for large vessel parts according to claim 1, wherein said detection tank (8) is composed of at least one detection cylinder (24) in the shape of a cylinder, when there is one detection cylinder (24), the cover plates (5) are connected to both ends of said detection cylinder (24), when there are a plurality of detection cylinders (24), said detection cylinders (24) are coaxially connected end to end in turn and communicated, and the cover plates (5) are respectively connected to the head end of the first detection cylinder and the tail end of the last detection cylinder.
3. A large vessel component helium leak detection system as claimed in claim 2, wherein when said detection cartridges (24) are plural, a first support means (26) adjacent to the junction of the detection cartridges (24) is attached to a first bracket (1) for assisting alignment of the connected detection cartridges (24).
4. Helium leak detection system for large vessel parts according to claim 3, wherein said detection means (21) further comprises support plates (27) provided at both ends of the detection tank (8), support rods (11) provided on said support plates (27) for supporting the cover plate (5), and second support means (23) of the support plates provided below said support plates (27).
5. Helium leak detection system for large container parts according to claim 4, characterized in that said first support means (26) comprises a support column (12) connected to the detection tank (8) and casters (3) for height adjustment and fixation provided on the support column (12), wherein the first support means (26) is structurally identical to the second support means (23), and the support column (12) of the second support means (23) is connected to the support plate (27).
6. Helium leak detection system for large vessel parts according to claim 5, characterized in that the standard leak hole (16) is provided with a standard leak hole valve (17) in its piping for isolating the external influences on the detection device and leak detector.
7. Helium leak detection system for large vessel components as defined in claim 6, wherein said vacuum extraction system comprises a dry pump (14) for pumping the test tank (8) below 10Pa for primary power, and a molecular pump (13) for pumping the test tank (8) to medium or high vacuum for primary power.
8. Helium leak detection system for large vessel components as claimed in claim 7, characterized in that the top of said leak detector (15) is provided with a third port (28) for connection to a standard leak (16) or a vacuum pick-up system (22).
9. The helium leak detection system for large container parts as claimed in claim 8, wherein a first valve (29) is arranged on a pipeline connecting the helium tank (19) and the pipe valve system (20), a second valve (30) is arranged on a pipeline connecting the pipe valve system (20) and the detection device (21), a leak detection valve (31) is arranged on a pipeline connecting the detection device (21) and the leak detector (15), and a third valve (32) is arranged on a pipeline connecting the vacuum acquisition system (22) and the detection device (21).
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| CN201922369581.7U CN211651945U (en) | 2019-12-26 | 2019-12-26 | Leakage detecting system for large container part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940461A (en) * | 2019-12-26 | 2020-03-31 | 中国工程物理研究院材料研究所 | Leakage detecting system and method for large container part |
| US11467053B2 (en) * | 2018-05-31 | 2022-10-11 | Goertek Inc. | Test device and calibrating method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11467053B2 (en) * | 2018-05-31 | 2022-10-11 | Goertek Inc. | Test device and calibrating method |
| CN110940461A (en) * | 2019-12-26 | 2020-03-31 | 中国工程物理研究院材料研究所 | Leakage detecting system and method for large container part |
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