CN110954280A - Leak detection device - Google Patents
Leak detection device Download PDFInfo
- Publication number
- CN110954280A CN110954280A CN201911216122.3A CN201911216122A CN110954280A CN 110954280 A CN110954280 A CN 110954280A CN 201911216122 A CN201911216122 A CN 201911216122A CN 110954280 A CN110954280 A CN 110954280A
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- Prior art keywords
- leak detection
- door
- gas
- guide rail
- leak
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
- G01M3/205—Accessories or associated equipment; Pump constructions
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a leakage detection device, which comprises a containing device, wherein the containing device is arranged on a bracket and comprises a leakage detection box and a closed door, the leakage detection box is provided with a feeding port, and the closed door is movably covered on the feeding port; the gas filling cavity is used for containing leak detection gas; a timed opening device for venting a leak detection gas from the plenum chamber after a period of time; and the detection device is communicated with the inside of the leakage detection box and is used for detecting gas in the leakage detection box. The whole leakage detection process is simple to operate, high in detection precision and capable of improving production efficiency.
Description
Technical Field
The invention belongs to the technical field of leak detection, and particularly relates to a leak detection device.
Background
In the prior art, along with the development of scientific technology, no matter in the technical field of vacuum or high-pressure air tightness engineering, the air tightness requirement of a part or a system is improved along with the development of the scientific technology, so that the research on improving the air tightness detection precision and influencing the air tightness factor is very urgent. When leak detection is performed on a sealed container, when the quality of a welding seam and the surface of the welding seam are detected to be provided with a tiny leak hole, a workpiece is completely sealed, a positive pressure method and a negative pressure method of a traditional leak detection method cannot be realized, a back pressure method is often adopted to perform leak detection on the sealed container, and the leak detection method is suitable for a detected part with a small volume. The leak detection process comprises 3 steps: pressurizing, purifying and detecting leakage. During the pressurizing process, the detected piece is stored in a container filled with high-pressure helium for a certain time, so that the helium enters the detected piece through the leakage hole, and the inflation pressure and helium partial pressure in the detected piece are gradually increased along with the increase of time; after entering the purification stage, flushing with dry nitrogen and the like, or removing helium adsorbed on the outer surface of the detected piece by a standing means; and finally, placing the detected piece into a vacuum chamber, vacuumizing the vacuum chamber, enabling helium in the detected piece to flow out to enter a leak detector by utilizing the pressure difference effect, and outputting an indication by the leak detector to judge the existence and the leak rate of a leak hole.
However, the back pressure method is not suitable for a test piece having a large leak hole. When the leak hole is too large, helium filled into the detected part can quickly run off in the purification stage, and the longer the purification time is, the more serious the helium runs off, so that the output indication of the leak detector is reduced, the false phenomenon that the leak rate of the leak hole is very small is caused, and even the leak hole cannot be detected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a leakage detection device.
The leak detection device of an embodiment of the invention includes a support, and further includes: the accommodating device is arranged on the bracket and comprises a leakage detection box and a closed door, the leakage detection box is provided with a feeding opening, and the closed door is movably covered on the feeding opening;
the gas filling cavity is used for containing leak detection gas;
a timed opening device for venting a leak detection gas from the plenum chamber after a period of time;
and the detection device is communicated with the inside of the leakage detection box and is used for detecting gas in the leakage detection box.
According to the leakage detecting device provided by the embodiment of the invention, the leakage detecting gas is put in before the workpiece to be detected is completely sealed, so that the problem that the leakage detecting gas cannot be introduced from the outside of the workpiece to be detected in the leakage detecting process of the closed container is solved, the timing opening device can enable the inflation cavity to discharge the leakage detecting gas at regular time, the operation is simple, the detection precision is high, and the production efficiency is improved. As long as the detection device detects that the leak detection gas exists in the leak detection box, the leak detection device can indicate that the workpiece to be detected has a leak hole, and the technical problem of detection errors caused by the large leak hole of the workpiece to be detected in the back pressure helium mass spectrum leak detection method is solved.
In a preferred or optional embodiment, the leak detection apparatus further includes a door closing device, the door closing device includes a door closing guide rail, a slider, and a door closing cylinder, a plane of the door closing guide rail is located on the same plane as a material inlet of the leak detection box, one end of the slider is slidably fitted on the door closing guide rail, the other end of the slider is fixedly connected to the closing door, a piston rod of the door closing cylinder is fixedly connected to the closing door, and the door closing cylinder pushes the closing door to move on the door closing guide rail.
In a preferred or optional embodiment, the leak detection device further comprises a clamp, the clamp is located inside the leak detection box, and the clamp is used for fixing a workpiece to be detected.
In a preferred or optional embodiment, the leak detection device further comprises a push-out device, the push-out device comprises a push-out guide rail and a push-out air cylinder, the push-out guide rail is arranged at the bottom end of the inside of the leak detection box, the push-out guide rail faces the feeding port of the leak detection box, the bottom end of the fixture is connected with the push-out guide rail in a sliding mode, the push-out air cylinder is arranged outside the leak detection box, a piston rod of the push-out air cylinder is fixedly connected with the fixture, and the push-out air cylinder drives the fixture to move on the push-out guide rail.
In a preferred or alternative embodiment, the leak detection gas is a halogen gas, helium gas, or hydrogen gas.
In a preferred or optional embodiment, the timed opening device comprises a storage unit, a timing unit and an opening unit, wherein the storage unit stores time parameters, the timing unit records measuring time, when the measuring time of the timing unit reaches the time parameters of the storage unit, the timing unit sends an actuating signal to the opening unit, and the opening unit enables the inflation cavity to open and emit the leak detection gas.
In a preferred or optional embodiment, the timed opening device further comprises a key unit, and the key unit sends the time parameter to the storage unit.
In order that the invention may be more clearly understood, specific embodiments thereof will be described hereinafter with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view of the overall configuration of a leak detection apparatus in embodiment 1 of the invention;
FIG. 2 is a schematic view of the operating principle of leak detection apparatus in accordance with embodiment 1 of the invention;
fig. 3 is a schematic structural diagram of a containing device in embodiment 1 of the present invention;
FIG. 4 is a schematic structural view of a timed opening device according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a door closing device according to embodiment 1 of the present invention;
FIG. 6 is a schematic view showing the structure of a holder and an ejector in accordance with embodiment 2 of the present invention;
FIG. 7 is a schematic view of the structure of a pushing-out apparatus according to embodiment 2 of the present invention.
The drawings illustrate schematically: 1. a support; 2. a housing device; 21. a leak detection box; 211. a feeding port; 22. a closing door; 3. a clamp; 4. an inflation cavity; 5. a detection device; 6. a door closing device; 61. a door closing guide rail; 62. a door closing cylinder; 7. a push-out device; 71. pushing out the guide rail; 72. and pushing out the cylinder.
Detailed Description
Example 1
Referring to fig. 1 and 2, fig. 1 is a schematic diagram showing the overall structure of a leak detection apparatus in embodiment 1 of the invention, and fig. 2 is a schematic diagram showing the operating principle of the leak detection apparatus in embodiment 1 of the invention.
The embodiment provides a leak detection device includes support 1, accommodating device 2, aerifys chamber 4, detection device 5 and door closing device 6, accommodating device 2 sets up on the support 1, aerify chamber 4 and place the inside at the work piece that awaits measuring when using, detection device 5 with the inside intercommunication of leak detection case 21, door closing device 6 sets up on the support 1 and with accommodating device 2 cooperates.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a containing device according to embodiment 1 of the present invention.
The accommodating device 2 comprises a leakage detection box 21 and a sealing door 22, the leakage detection box 21 is a hollow box body, the leakage detection box 21 is provided with a feeding port 211, a workpiece to be detected is placed into the leakage detection box 21 through the feeding port 211, and the sealing door 22 is movably covered on the feeding port 211. In this embodiment, the bracket 1 is provided with a guide rail, the closing door 22 is embedded on the guide rail through a slider, and the closing door 22 can move on the guide rail, so as to control the closing of the material inlet 211, in other embodiments, one side of the closing door 22 is fixed on the bracket 1 through a rotating shaft, the closing door 22 rotates around the rotating shaft, and the closing of the closing door 22 on the material inlet 211 is controlled by controlling the rotating angle of the closing door 22, which may also be other movable closing manners commonly used by those skilled in the art.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the gas-filled chamber 4 according to embodiment 1 of the present invention.
Aerify chamber 4 and be located the inside of work piece that awaits measuring, aerify chamber 4 and be used for holding leak hunting gas, timing opening device is used for making after a period aerify chamber 4's leak hunting gas and leak. In this embodiment, the inflation cavity 4 is in the shape of a hollow capsule, and in other embodiments, the inflation cavity 4 may be any other capsule structure commonly used by those skilled in the art as long as it can contain the leak detection gas and can be placed inside the workpiece to be detected.
In this embodiment, the timing opening device surrounds the inflation cavity 4, so that the inflation cavity 4 is arranged inside the timing opening device, a through hole is arranged on the surface of the timing opening device after a period of time, the inflation cavity 4 is communicated with the outside of the timing opening device, and the leakage detection gas of the inflation cavity 4 leaks.
Preferably, the timing opening device includes a storage unit, a timing unit, an opening unit and a key unit, the storage unit stores a time parameter, the timing unit records a measurement time, when the measurement time of the timing unit reaches the time parameter of the storage unit, the timing unit sends an action signal to the opening unit, in this embodiment, the opening unit is a through hole which can be controlled to be opened and closed, and may also be an opening device commonly used by those skilled in the art, such as a needle, a saw tooth, etc., for piercing the inflation cavity 4, the opening unit enables the inflation cavity 4 to release the leak detection gas, and the key unit sends the time parameter to the storage unit. Before the user uses, the user passes through the button unit sets up time parameter, the memory cell receives and stores time parameter, the timing unit measurement reachs measuring time, the timing unit will measuring time with the time parameter of memory cell is compared, works as when measuring time reachs when the time parameter, several time units send actuating signal to the opening unit, make the leak hunting gas of plenum chamber 4 leaks. The timing unit may be provided with a display screen, and may count down in a count down mode, and the key unit may be a physical key or a virtual key of a touch screen.
The detection device 5 is communicated with the inside of the leak detection box 21 and is used for detecting leak detection gas in the accommodating cavity of the leak detection box 21. The leak detection gas is halogen gas, helium gas, hydrogen gas or other detectable media, and correspondingly, the detection device 5 is a halogen gas detector, a helium mass spectrometer leak detector, a hydrogen gas detector or other detection devices.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a door closing device according to embodiment 1 of the present invention.
The door closing device 6 includes a door closing guide rail 61, a slider (not shown) and a door closing cylinder 62, the door closing guide rail 61 is disposed on the bracket 1, a plane where the door closing guide rail 61 is located and a feeding port 211 of the leakage detecting box 21 are located on the same plane, one end of the slider is slidably embedded on the door closing guide rail 61, the other end of the slider is fixedly connected to the closing door 22, the door closing cylinder 62 is fixedly connected to the bracket 1, a piston rod of the door closing cylinder 6282 is fixedly connected to the closing door 22, and the door closing cylinder 62 pushes the closing door 22 to move on the door closing guide rail 61. Preferably, the door closing cylinder 62 is located below the leakage detecting box 21, and the door closing cylinder 62 pushes the closing door 22 to open and close the feeding port 211 of the leakage detecting box 21.
The leak detection device of this embodiment puts into leak detection gas before the work piece that awaits measuring is sealed completely, can't let in the problem of leak detection gas from the outside of the work piece that awaits measuring when solving the airtight container leak hunting, and timing opening device can make it regularly emits leak detection gas to aerify the chamber, easy operation, and it is high to detect the precision, improves production efficiency. As long as the detection device detects that the leak detection gas exists in the leak detection box, the leak detection device can indicate that the workpiece to be detected has a leak hole, and the technical problem of detection errors caused by the large leak hole of the workpiece to be detected in the back pressure helium mass spectrum leak detection method is solved.
Example 2
Referring to fig. 6 and 7, fig. 6 is a schematic structural view of a clamp and a push-out device according to embodiment 2 of the present invention, and fig. 7 is a schematic structural view of the push-out device according to embodiment 2 of the present invention.
This embodiment provides a leak detection apparatus which is mainly different from embodiment 1 in that it further includes a jig 3 and an ejector 7. The clamp 3 is arranged inside the accommodating device 2, and the door closing device 6 is arranged on the bracket 1 and matched with the accommodating device 2.
Anchor clamps 3 are for being provided with the box body of accommodation space, the top of box body is provided with the opening that is used for placing the work piece that awaits measuring, anchor clamps 3 are used for fixed work piece that awaits measuring.
The push-out device 7 comprises a push-out guide rail 71 and a push-out air cylinder 72, the push-out guide rail 71 is arranged at the bottom end of the interior of the leakage detection box 21, the trend of the push-out guide rail 71 faces the feeding port 211 of the leakage detection box 21, the bottom end of the clamp 3 is connected with the push-out guide rail 71 in a sliding mode, in the embodiment, the bottom end of the clamp 3 is provided with a roller, the roller is connected with the push-out guide rail 71 in a sliding mode, in other embodiments, the bottom end of the clamp 3 can be provided with a sliding block, and the sliding block is connected with the push-out guide. The push-out cylinder 72 is arranged outside the leak detection box 21, the push-out cylinder 72 is arranged on the support 1, a piston rod of the push-out cylinder 72 is fixedly connected with the clamp 3, the push-out cylinder 72 drives the clamp 3 to move on the push-out guide rail 71, and when the piston rod of the push-out cylinder 72 extends out, the clamp 3 moves from the inside of the leak detection box 21 to the feeding port 211 of the leak detection box 21.
The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.
Claims (7)
1. A leak detection apparatus comprising a support, comprising:
the accommodating device is arranged on the bracket and comprises a leakage detection box and a closed door, the leakage detection box is provided with a feeding opening, and the closed door is movably covered on the feeding opening;
the gas filling cavity is used for containing leak detection gas;
a timed opening device for venting a leak detection gas from the plenum chamber after a period of time;
and the detection device is communicated with the inside of the leakage detection box and is used for detecting gas in the leakage detection box.
2. Leak detection apparatus according to claim 1, wherein:
still include the door closing device, the door closing device is including closing door guide rail, slider and door closing cylinder, the guide rail place plane of closing the door with the pan feeding mouth of examining the leakage box is located the coplanar, the slip gomphosis of slider one end is in on the guide rail of closing the door, the other end fixed connection of slider in closed door, the piston rod fixed connection of door closing cylinder in closed door, door closing cylinder promotes closed door is in move on the guide rail of closing the door.
3. Leak detection apparatus according to claim 1, wherein:
the leak detection device is characterized by further comprising a clamp, wherein the clamp is located inside the leak detection box and used for fixing a workpiece to be detected.
4. Leak detection apparatus according to claim 3, wherein:
still include ejecting device, ejecting device includes ejecting guide rail and ejecting cylinder, ejecting guide rail sets up the bottom of the inside of examining the leak box, ejecting guide rail's trend towards examine the pan feeding mouth of leak box, the bottom of anchor clamps with ejecting guide rail sliding connection, ejecting cylinder sets up examine the outside of leak box, ejecting cylinder's piston rod fixed connection anchor clamps, ejecting cylinder drives anchor clamps are in the ejecting guide rail is last to move.
5. Leak detection apparatus according to claim 1, wherein:
the leak detection gas is halogen gas, helium gas or hydrogen gas.
6. Leak detection apparatus according to any one of claims 1 to 5, characterized in that:
the timing opening device comprises a storage unit, a timing unit and an opening unit, wherein the storage unit stores time parameters, the timing unit records measuring time, when the measuring time of the timing unit reaches the time parameters of the storage unit, the timing unit sends an action signal to the opening unit, and the opening unit enables the inflation cavity to generate an opening and emit the leak detection gas.
7. Leak detection apparatus according to any one of claims 1 to 5, characterized in that:
the timing opening device further comprises a key unit, and the key unit sends the time parameters to the storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216122.3A CN110954280A (en) | 2019-12-02 | 2019-12-02 | Leak detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911216122.3A CN110954280A (en) | 2019-12-02 | 2019-12-02 | Leak detection device |
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| Publication Number | Publication Date |
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| CN110954280A true CN110954280A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911216122.3A Pending CN110954280A (en) | 2019-12-02 | 2019-12-02 | Leak detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514194A (en) * | 2021-03-04 | 2021-10-19 | 中国核电工程有限公司 | Container weld joint sealing detection device and detection method |
| CN114184329A (en) * | 2021-10-18 | 2022-03-15 | 上海贤日测控科技有限公司 | Leak detection mechanism |
| CN114653616A (en) * | 2020-12-22 | 2022-06-24 | 安徽力翔电池科技有限公司 | High-precision self-suction type flow-dividing helium detection intelligent sorting system |
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| CN208795436U (en) * | 2018-10-22 | 2019-04-26 | 苏州科联盈自动化***有限公司 | Helium mass spectrum leak detection equipment for new energy vehicle controller component |
| CN110146231A (en) * | 2019-06-17 | 2019-08-20 | 蚌埠兴创电子科技有限公司 | A kind of helium Mass Spectrometer Method device for saving helium |
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| CN2757110Y (en) * | 2004-11-25 | 2006-02-08 | 邓永林 | Leak detector |
| CN101832842A (en) * | 2010-06-08 | 2010-09-15 | 中国人民解放军63653部队 | Method for carrying out helium mass spectrum leak detection on integral container |
| CN104713685A (en) * | 2015-02-10 | 2015-06-17 | 湖南省精一自动化有限公司 | Vacuum box type leakage inspector and inspection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114653616A (en) * | 2020-12-22 | 2022-06-24 | 安徽力翔电池科技有限公司 | High-precision self-suction type flow-dividing helium detection intelligent sorting system |
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| CN114184329A (en) * | 2021-10-18 | 2022-03-15 | 上海贤日测控科技有限公司 | Leak detection mechanism |
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Application publication date: 20200403 |