CN118032222A - Semi-closed helium quality testing leakage device - Google Patents

Abstract

The application relates to a semi-closed helium quality detection leakage device, which comprises a detection component, wherein the detection component comprises a helium mass spectrum leak detector, a detection disk is fixedly arranged on the helium mass spectrum leak detector, a rubber pad is fixedly arranged on the detection disk, a helium detection hole communicated with the helium mass spectrum leak detector is formed in the rubber pad, a piece to be detected can be placed on the rubber pad and covers the helium detection hole, the helium mass spectrum leak detector can vacuumize the helium detection hole, the semi-closed helium quality detection leakage device further comprises a first nozzle used for spraying helium gas to the top of the piece to be detected and a second nozzle used for spraying helium gas to the side face of the piece to be detected, and the first nozzle and the second nozzle are provided with helium bags through pipelines. The semi-closed helium leakage detection device further comprises a screw cylinder, a screw path groove is formed in the screw cylinder, the second nozzle can ascend or descend in a screw mode along the screw path groove, helium can be sprayed more uniformly, and therefore detection time is shortened.

Description

Semi-enclosed helium leak detection device

Technical Field

The present application relates to the field of vacuum leak detection, and in particular to a semi-enclosed helium leak detection device.

Background technique

The Vacuum Decay Method (VDM) is a relatively new non-destructive leak detection method. In the vacuum decay method, the tester places the vacuum package into the test chamber, evacuates the test chamber, and monitors the vacuum level and vacuum changes in the test chamber during the predetermined test time through an absolute pressure/differential pressure sensor. The changes in absolute pressure and differential pressure mean that there is a leak in the package. The vacuum decay leak detection method (F2338-05) agreed to by the American Society for Testing and Materials (ASTM) has passed FDA certification, and this method is recognized as a standard packaging integrity test method. However, the sensitivity of the vacuum decay method depends on the test fixture and two key parameters of the test: time and pressure. For ordinary vacuum packages, the test cycle takes several seconds, which is difficult to meet the needs of fast online detection, resulting in a high test cost.

Summary of the invention

In order to achieve rapid detection of vacuum packaged objects, the present application provides a semi-enclosed helium leak detection device.

The semi-enclosed helium quality leak detection device provided in this application adopts the following technical solution:

A semi-enclosed helium mass leak detection device comprises a detection component, a first jet component and a second jet component, wherein the detection component comprises a helium mass spectrometer leak detector, a test base and a detection disk, wherein the test base is fixedly arranged on the helium mass spectrometer leak detector, and the top of the test base is fixedly connected to the detection disk, a rubber pad is fixedly arranged on the detection disk, and a through hole is opened on the rubber pad to form a helium detection hole, and a workpiece to be tested can be placed on the helium detection hole and cover the helium detection hole, the first jet component comprises a first nozzle, and the first nozzle can spray helium toward the top of the workpiece to be tested, and the second jet component comprises a second nozzle, and the second nozzle can spray helium toward the side of the workpiece to be tested.

By adopting the above technical scheme, by setting the first nozzle and the second nozzle, the first nozzle and the second nozzle cooperate to achieve uniform helium injection to the test piece, which is a necessary condition for leak detection of the test piece; by setting the helium mass spectrometer leak detector, the helium mass spectrometer leak detector can achieve the technical effect of vacuuming, and the helium mass spectrometer leak detector can also detect helium in the extracted gas. If helium is present, it means that there is a leak in the test piece and the air tightness is not good; by setting the rubber pad, a helium detection hole is opened on the rubber pad, and the test piece can cover the helium detection hole when placed on the rubber pad. The rubber pad can seal the contact surface of the test piece, so that a sealed cavity is formed between the test piece and the helium detection hole, which can prevent helium from passing through between the rubber pad and the test piece.

In a specific possible implementation scheme, a through hole is opened on the detection disk to form a measuring disk hole, and the measuring disk hole is connected to the helium detection hole. A through hole is opened in the test base, and a vacuum tube is arranged in the through hole. One end of the vacuum tube is connected to the helium mass spectrometer leak detector, and the other end is connected to the measuring disk hole.

By adopting the above technical solution and setting the detection disk, the detection disk can play a supporting and fixing role on the rubber pad, a detection disk hole is opened inside the detection disk, the detection disk hole is connected with the helium detection hole, a vacuum tube is arranged in the test base, the vacuum tube, the detection disk hole and the helium detection hole are connected, the helium mass spectrometer leak detector can evacuate the test piece to make the test piece tightly attached to the rubber pad, when there is a leak in the test piece, the helium around the test piece can be sucked into the helium detection hole through the leak, and then sucked into the helium mass spectrometer leak detector through the detection disk hole and the vacuum tube for detection.

In a specific possible implementation, a telescopic sleeve is fixedly provided on the helium mass spectrometer leak detector, and the telescopic sleeve comprises a bottom barrel portion and a telescopic portion, a screw barrel fixing frame is fixedly provided on the bottom barrel portion, and a top plate is fixedly provided on the telescopic portion.

By adopting the above technical solution and setting the telescopic sleeve, the telescopic sleeve can fix the screw barrel fixing frame and the top plate, and the screw barrel fixing frame and the top plate can support and fix the parts of the device. The telescopic sleeve includes a bottom barrel part and a telescopic part, and the top plate is fixed on the telescopic part, which helps the top plate to achieve the function of rising and falling.

In a specific feasible implementation scheme, a motor is fixedly mounted on the top plate, the motor is fixedly mounted on the top of the top plate, the motor includes a rotating shaft, a transmission key is fixedly mounted on the rotating shaft, the rotating shaft is fixedly connected to a transmission sleeve via the transmission key, and a sleeve flange is mounted on the transmission sleeve.

By adopting the above technical solution, through the setting of the motor and the rotating shaft, it can provide and transmit power. A transmission key is fixedly set on the rotating shaft, and the rotating shaft is fixedly connected to the transmission sleeve through the transmission key, which can achieve the technical effect of the transmission sleeve rotating.

In a specific feasible implementation scheme, a thrust bearing is provided in the top plate, a rotating drum is mounted on the thrust bearing, a rotating drum flange is provided on the rotating drum, the rotating drum is mounted on the thrust bearing via the rotating drum flange, and the rotating drum flange is fixedly connected to the sleeve flange.

By adopting the above technical scheme, by setting the sleeve flange and the drum flange, the sleeve flange and the drum flange are fixedly set, so as to realize the function of power transmission between the drum and the transmission sleeve, the drum flange is installed on the thrust bearing, and the thrust bearing is fixedly set on the top plate, the top plate can support the thrust bearing, the thrust bearing can make the rotation more stable, and the thrust bearing can also support the drum and the transmission sleeve, reduce the vertical pressure formed by the drum and the transmission sleeve on the rotating shaft, and can protect the motor, which helps the motor to rotate normally.

In a specific possible implementation manner, a vertical plate is fixedly provided on the outer surface of the drum, a plurality of the vertical plates are fixedly provided at intervals around the outer surface of the drum, a driving groove is formed between the vertical plates, and the first nozzle is fixedly provided inside the drum.

By adopting the above technical solution, through the setting of the vertical plate, a driving groove is formed between the vertical plate and the rotating drum, and the driving groove can play a role in driving the rotation; by setting the first nozzle inside the rotating drum, it is helpful to align the first nozzle with the top of the test piece to spray helium.

In a specific possible implementation, a screw barrel is arranged on the screw barrel fixing frame, a through groove is opened on the screw barrel to form a screw groove, an anti-slip pattern is opened on the inner wall of the screw groove, and the rotating barrel is inserted into the screw barrel.

By adopting the above technical solution, through the setting of the screw barrel, a screw groove is opened on the screw barrel, and the screw groove can play a role in limiting the movement trajectory; by providing anti-skid patterns on the screw groove, the anti-skid patterns help the roller to move along the screw groove.

In a specific possible implementation manner, the second jet assembly further comprises a connecting arm, on which a roller is rotatably provided, the roller passes through the screw groove and extends into the driving groove, and the roller is provided with anti-slip grooves.

By adopting the above technical solution, through the setting of the roller, the roller is provided with anti-slip grooves, which helps the roller to move better along the anti-slip grooves in the screw groove; through the setting of the connecting arm, the connecting arm can fix the roller.

In a specific possible implementation scheme, a fixed plate is fixedly provided on the connecting arm, the second nozzle is fixedly provided on the fixed plate, a fixed circular plate is fixedly provided in the rotating drum, and the first nozzle is fixedly provided on the fixed circular plate.

By adopting the above technical solution, by setting the fixing plate, the fixing plate can play a fixing role on the second nozzle, and by setting the fixing circular plate, the fixing circular plate can play a fixing role on the first nozzle.

In a specific embodiment, the first nozzle and the second nozzle are connected to a helium bag via a pipeline.

By adopting the above technical solution and arranging the helium bag, the helium bag can provide helium for the device.

In summary, the present application includes at least one of the following beneficial technical effects:

1. Through the setting of the rubber pad, the test piece can be placed on the rubber pad, and a helium detection hole is opened in the rubber pad. When the test piece is placed on the rubber pad, the test piece can cover the helium detection hole, and the rubber pad can seal the surface of the test piece to prevent helium from passing through between the test piece and the sealing pad. When the helium mass spectrometer starts to evacuate, the test piece can be tightly adsorbed on the rubber pad. Since the rubber pad itself has elasticity, the rubber pad can produce elastic deformation when the test piece is adsorbed and can wrap the side of the test piece, which can further seal the test piece.

2. Through the setting of the screw barrel, a screw groove is opened on the screw barrel, and the second jet assembly includes a connecting arm, which is connected to a roller through a bearing, and the roller and the screw groove are connected through an anti-slip pattern. The other end of the connecting arm is fixedly connected to a fixing plate, and a second nozzle is fixedly arranged on the fixing plate. When the roller rolls along the screw groove, the second nozzle can spirally rise or fall along the screw groove, which helps to make the helium ejected from the second nozzle reach the workpiece to be tested more evenly, improve the helium wrapping of the workpiece to be tested, and when a leak occurs in the workpiece to be tested, the helium can be promptly drawn from the leak into the helium detection chamber, thereby achieving a technical effect of shortening the detection time.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an overall schematic diagram of a semi-enclosed helium quality leak detection device;

FIG2 is a schematic diagram showing the test base installation structure;

FIG3 is a cross-sectional view showing the internal structure of a semi-enclosed helium quality leak detection device;

FIG4 is a partial enlarged view of point A in FIG3 ;

FIG5 is a schematic diagram of the installation position of the second jet assembly;

FIG. 6 is a schematic diagram showing the specific installation position of the roller.

Explanation of the reference numerals: 21, helium mass spectrometer leak detector; 22, test base; 221, vacuum tube; 23, detection disk; 231, rubber pad; 232, helium detection hole; 233, test disk hole; 234, rubber sealing ring; 24, test piece; 31, first nozzle; 32, second nozzle; 33, fixed circular plate; 5, top plate; 51, motor; 511, rotating shaft; 512, transmission key; 513, transmission sleeve; 514, thrust bearing; 515, sleeve flange; 52, rotating drum; 521, vertical plate; 522, driving groove; 523, rotating drum flange; 53, supporting cavity; 6, screw barrel fixing frame; 61, screw barrel; 611, screw groove; 612, anti-slip pattern; 623, connecting arm; 625, roller; 626, fixing plate; 7, telescopic sleeve; 71, bottom barrel; 72, telescopic part.

Detailed ways

The present application is further described in detail below in conjunction with Figures 1 to 6.

The embodiment of the present application discloses a semi-enclosed helium mass leak detection device. Referring to Figures 1 and 2, the detection assembly includes a helium mass spectrometer leak detector 21, a test base 22 is fixedly arranged on the top of the helium mass spectrometer leak detector 21, a through hole is provided in the test base 22, and a vacuum tube 221 is provided in the through hole. A detection disk 23 is fixedly connected to the top of the test base 22. In the embodiment of the present application, the detection disk 23 is set in a circular shape. A rubber pad 231 is fixedly arranged on the detection disk 23, and the shape and size of the rubber pad 231 are matched with the detection disk 23. A through hole is provided inside the detection disk 23 to form a detection disk hole 233, and the aperture of the detection disk hole 233 is set to be larger than the outer diameter of the vacuum tube 221. A rubber sealing ring 234 is sleeved on the vacuum tube 221. After the rubber sealing ring 234 is shrunk on the vacuum tube 221 at low temperature, the vacuum tube 221 is connected with the detection disk hole 233 by socket connection. A through hole is provided at the position of the rubber pad 231 corresponding to the detection disk 23 to form a helium detection hole 232. The test piece 24 is placed on the rubber pad 231 and covers the helium detection hole 232 for detection. The detection disk 23 and the test base 22 are specifically configured to be detachably connected, and the detection disk 23 can be replaced according to the shape of the test piece 24, thereby improving the test range of the device. The base 1 is specifically configured to be rectangular, and a telescopic sleeve 7 is fixedly provided on the base 1 by screws. There are 4 telescopic sleeves 7, which are respectively fixed near the four corners of the base 1. The telescopic sleeve 7 includes a bottom barrel portion 71 and a telescopic portion 72. Specifically, the telescopic sleeve 7 is fixedly provided on the base 1 through the bottom barrel portion 71, and the diameter of the telescopic portion 72 is set to be smaller than the diameter of the bottom barrel portion 71, and the telescopic portion 72 is sleeved in the bottom barrel portion 71. A screw barrel fixing frame 6 is fixedly connected to the bottom barrel portion 71 near the telescopic portion 72, and the screw barrel fixing frame 6 is specifically configured to be in the shape of a rectangular plate.

3 and 4, a top plate 5 is fixedly provided on the top of the telescopic portion 72, a motor 51 is fixedly provided on the top plate 5 by bolts, the motor 51 includes a rotating shaft 511, the rotating shaft 511 is arranged toward the top plate 5, a transmission key 512 is fixedly provided on the rotating shaft 511, the rotating shaft 511 is fixedly connected with a transmission sleeve 513 through the transmission key 512, a cavity is opened inside the top plate 5 to form a support cavity 53, the transmission sleeve 513 is rotatably arranged in the support cavity 53, a gap is reserved between the transmission sleeve 513 and the inner wall of the support cavity 53 to facilitate the rotation of the transmission sleeve 513, and the transmission sleeve The end of the rotating drum 513 away from the motor 51 is integrally formed with a sleeve flange 515, and the sleeve flange 515 is fixedly connected with the rotating drum 52 by bolts. The end of the rotating drum 52 close to the transmission sleeve 513 is integrally formed with a rotating drum flange 523, and the rotating drum 52 is specifically fixedly connected with the sleeve flange 515 through the rotating drum flange 523. A thrust bearing 514 is arranged in the top plate 5, and the side of the rotating drum flange 523 away from the sleeve flange 515 is installed at the top position of the thrust bearing 514, and the thrust bearing 514 can make the rotation between the rotating drum 52 and the transmission sleeve 513 more stable. A first jet assembly is fixedly arranged inside the rotating drum 52, and the first jet assembly includes a first nozzle 31 and a fixed circular plate 33. The first nozzle 31 is fixedly arranged at the bottom of the fixed circular plate 33, and the fixed circular plate 33 is fixedly arranged inside the rotating drum 52. The first nozzle 31 can spray helium toward the top position of the test piece 24.

5 and 6, the rotating drum 52 is set in a cylindrical shape, and a plurality of vertical plates 521 are welded around the outer side of the rotating drum 52 around the rotating shaft 511. The length of the vertical plates 521 is the same as the height of the rotating drum 52, and a driving groove 522 is formed between the plurality of vertical plates 521. The screw barrel fixing frame 6 is provided with a screw barrel 61, and the diameter of the rotating drum 52 is set to be smaller than the diameter of the screw barrel 61. This setting enables the rotating drum 52 to extend into the screw barrel 61. When the motor 51 drives the transmission sleeve 513 to rotate, the transmission sleeve 513 can drive the rotating drum 52 to rotate in the screw barrel 61. The screw barrel 61 is set as a cylindrical barrel structure, the top and bottom of the screw barrel 61 are set as openings, the side of the screw barrel 61 is surrounded by a through groove to form a screw groove 611, and the screw barrel 61 is provided with a second jet assembly, which includes a connecting arm 623, and two connecting arms 623 are provided. The two connecting arms 623 are rotatably provided with rollers 625 on one side close to the screw barrel 61, and the end of the roller 625 away from the connecting arm 623 passes through the screw groove 611 and extends into the driving groove 522. The roller 625 is provided with an anti-skid pattern 612, and the groove wall of the screw groove 611 is provided with an anti-skid pattern 612. The roller 625 and the screw groove 611 can be meshed through the anti-skid pattern 612. The two connecting arms 623 are staggered at an angle, and this setting can adapt to the slope of the screw groove 611. A fixing plate 626 is also fixedly provided at one end of the connecting arm 623 away from the roller 625. The two connecting arms 623 are fixedly connected through the fixing plate 626. The second jet assembly also includes a second nozzle 32, which is arranged on the fixing plate 626. The second nozzle 32 can spray helium toward the side of the test piece 24. The first nozzle 31 and the second nozzle 32 are both connected to a helium bag through a pipeline.

The implementation principle of the embodiment of the present application is as follows: the workpiece 24 to be tested is placed on the rubber pad 231 so that the bottom surface of the workpiece 24 covers the helium detection hole 232, the equipment is started, the helium mass spectrometer 21 starts to draw a vacuum, and the workpiece 24 to be tested can be tightly adsorbed on the rubber pad 231, the motor 51 starts to drive the transmission sleeve 513 to rotate, and the transmission sleeve 513 drives the rotating drum 52 to rotate. When the rotating drum 52 rotates, the vertical plate 521 limits the roller 625 arranged in the driving groove 522, and the roller 625 can climb or descend along the shape of the screw groove 611 in the direction of rotation of the rotating drum 52, thereby driving the second nozzle 32 to spirally rise or descend along the screw groove 611, so that the second nozzle 32 can evenly spray helium around the workpiece 24, thereby shortening the detection time. When the roller 625 climbs or descends along the screw groove 611 in the direction of rotation of the rotating drum 52, the force of the second nozzle 32 spraying helium on the workpiece 24 can be changed. The helium mass spectrometer leak detector 21 evacuates the inside of the helium detection hole 232. If there is a leak in the test piece 24, helium can be drawn into the test piece 24 through the leak for detection by the helium mass spectrometer leak detector 21, and a reminder signal is sent to the operator to inform the operator that the test piece 24 has failed the detection. If there is no leak in the test piece 24, no reminder is given, thereby finally realizing the function of rapid testing of the test piece 24.

The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. Semi-closed helium leak hunting device, its characterized in that: including detection subassembly, first jet assembly and second jet assembly, detection subassembly includes helium mass spectrum leak detector (21), test base (22) and detects dish (23), test base (22) are fixed to be set up on helium mass spectrum leak detector (21), the top of test base (1) with detect dish (23) fixed connection, the fixed rubber pad (231) that is provided with on detecting dish (23), through-hole formation helium detection hole (232) have been seted up on rubber pad (231), and piece (24) to be tested can be placed on helium detection hole (232) and will helium detection hole (232) cover, first jet assembly includes first spout (31), first spout (31) can spray helium towards the top of piece (24) to be tested, second jet assembly includes and second spout (32), second spout (32) can spray helium towards the side of piece (24) to be tested.

2. The semi-enclosed helium leak detection apparatus of claim 1, wherein: the detection disc (23) is provided with a through hole to form a disc detection hole (233), the disc detection hole (233) is communicated with the helium detection hole (232), the test base (1) is internally provided with a through hole, a vacuum tube (221) is arranged in the through hole, one end of the vacuum tube (221) is communicated with the helium mass spectrometer leak detector (21), and the other end of the vacuum tube is communicated with the disc detection hole (233).

3. The semi-enclosed helium leak detection apparatus of claim 1, wherein: the helium mass spectrometer leak detector (21) is further fixedly provided with a telescopic sleeve (7), the telescopic sleeve (7) comprises a bottom cylinder part (71) and a telescopic part (72), a screw cylinder fixing frame (6) is fixedly arranged on the bottom cylinder part (71), and a top plate (5) is fixedly arranged on the telescopic part (72).

4. A semi-enclosed helium leak detection unit according to claim 3, wherein: the motor (51) is fixedly arranged on the top plate (5), the motor (51) is fixedly arranged at the top of the top plate (5), the motor (51) comprises a rotating shaft (511), a transmission key (512) is fixedly arranged on the rotating shaft (511), the rotating shaft (511) is fixedly connected with a transmission sleeve (513) through the transmission key (512), and a sleeve flange (515) is arranged on the transmission sleeve (513).

5. The semi-enclosed helium leak detection apparatus of claim 4, wherein: be provided with thrust bearing (514) in roof (5), install rotary drum (52) on thrust bearing (514), be provided with rotary drum flange (523) on rotary drum (52), rotary drum (52) are passed through rotary drum flange (523) are installed on thrust bearing (514), rotary drum flange (523) with sleeve flange (515) fixed connection.

6. The semi-closed helium leak detection apparatus of claim 5, wherein: the novel rotary drum is characterized in that a riser (521) is fixedly arranged on the outer surface of the rotary drum (52), a plurality of risers (521) are fixedly arranged around the outer surface of the rotary drum (52) at intervals, a driving groove (522) is formed between the risers (521), and the first nozzle (31) is fixedly arranged inside the rotary drum (52).

7. The semi-closed helium leak detection apparatus of claim 6, wherein: screw barrels (61) are arranged on the screw barrel fixing frame (6), through grooves are formed in the screw barrels (61) to form screw stroke grooves (611), anti-slip lines (612) are formed in the inner walls of the screw stroke grooves (611), and the rotating cylinders (52) are arranged in the screw barrels (61) in a penetrating mode.

8. The semi-closed helium leak detection apparatus of claim 7, wherein: the second jet assembly further comprises a connecting arm (623), a roller (625) is rotatably arranged on the connecting arm (623), the roller (625) penetrates through the screw groove (611) and stretches into the driving groove (522), and anti-slip lines (612) are formed on the roller (625).

9. The semi-closed helium leak detection apparatus of claim 8, wherein: the connecting arm (623) is fixedly provided with a fixing plate (626), the second nozzle (32) is fixedly arranged on the fixing plate (626), the rotary drum (52) is internally fixedly provided with a fixing circular plate (33), and the first nozzle (31) is fixedly arranged on the fixing circular plate (33).

10. The semi-enclosed helium leak detection apparatus of claim 1, wherein: the first nozzle (31) and the second nozzle (32) are connected with helium bags through pipelines.