Accumulation method helium detection tool and helium detection method thereof

Abstract

The invention relates to the technical field of accumulation method helium detection, and provides an accumulation method helium detection tool and a helium detection method thereof.The accumulation method helium detection tool comprises a lower mold frame, a to-be-detected assembly is arranged at the top of the lower mold frame and comprises a first product cavity, a second product cavity is clamped to the top of the first product cavity, and a plurality of filling air bags are placed in the first product cavity; a helium filling pipe is fixedly connected to the middle of the second product cavity, a plurality of helium discharging pipes used for discharging helium are fixedly connected to the two ends of the second product cavity, an accumulation assembly used for accumulating leaked helium in the first product cavity is arranged on the outer side of the first product cavity, and a helium detection assembly used for detecting the concentration of helium in the accumulation assembly is arranged at the bottom end of the lower mold frame. When the helium is recovered, the filling air bag is inflated through the air pump, so that the filling air bag expands to reduce the internal volume of the first product cavity and the second product cavity, and residual helium in the first product cavity and the second product cavity is extruded out to improve the recovery rate of the helium.

Description

Technical Field

[0001] The present invention relates to the technical field of accumulation method helium detection, and in particular to an accumulation method helium detection tool and a helium detection method thereof. Background Art

[0002] The accumulation method helium detection tool is a special device for detecting workpiece leakage. It is based on the accumulation method principle and uses helium as a tracer gas for leak detection. The working principle of the accumulation method helium detection tool is to place the workpiece filled with helium in a closed cavity (accumulation chamber). If the workpiece leaks, the helium will escape through the leak hole and be evenly distributed in the entire cavity. By detecting the change in helium concentration in the cavity, the leakage of the workpiece can be inferred. In order to improve the accuracy and consistency of the detection, it is usually necessary to let the leaked helium accumulate in the cavity for a certain period of time. After the detection, the helium needs to be discharged for recovery;

[0003] After searching, the Chinese patent (Announcement No.: CN113607338 II) disclosed “an automatic helium exhaust device at the top of the accumulation cover in the accumulation method helium inspection, which drives the motor inside the box to drive the gear 1 to rotate, and the gear 1 and the gear 2 are meshed to drive the threaded rod to rotate, and the threaded rod rotates so that the connecting seat screwed with the threaded rod moves the pushing block left and right along the guide rod, and when the two limit blocks on the receiving panel move to the corresponding positions at the same time to squeeze the bottom surface of the roller, the sealing plate covers the rectangular through hole 1, and the helium exhaust channel of the helium exhaust device is closed, and when the threaded rod drives the sealing plate to move rightward by driving the support frame and the sealing plate is gradually separated from the rectangular through hole 1 under the lifting action of the reset spring, the helium exhaust channel of the helium exhaust device is opened, thereby realizing automatic helium exhaust in the gap between detection and feeding”;

[0004] However, in the process of implementing the relevant technology, this type of patent has certain technical defects. Among them, the patent drives the motor inside the box to drive the gear one to rotate, and the gear one and the gear two are meshed and transmitted to rotate the threaded rod. The rotation of the threaded rod causes the connecting seat screwed with the threaded rod to move left and right along the guide rod with the pushing block. When the two limit blocks on the receiving panel move to the corresponding positions at the same time to squeeze the bottom surface of the roller, the sealing plate covers the top of the through hole one, and the helium exhaust channel of the helium exhaust device is closed. When the threaded rod drives the sealing plate to move right by driving the support frame and the sealing plate is gradually separated from the through hole one under the lifting action of the reset spring, the helium exhaust channel of the helium exhaust device is opened, thereby realizing automatic helium exhaust in the gap between detection and feeding.

[0005] However, since the internal volume of the accumulation hood is fixed, when the helium inside the workpiece leaks, the helium will be evenly diffused in different areas inside the accumulation hood. Even if the helium exhaust device can perform intermittent helium exhaust, the internal and external air pressures of the accumulation hood need to be kept balanced. Therefore, the helium inside the accumulation hood cannot be completely discharged and some helium will remain, thereby greatly reducing the helium recovery efficiency. In view of this, the present invention proposes an accumulation method helium inspection tool and a helium inspection method thereof. Summary of the invention

[0006] The present invention provides an accumulation method helium detection tool and a helium detection method thereof, which solves the problem of low helium recovery efficiency in the prior art.

[0007] The technical solution of the present invention is as follows: a cumulative helium inspection tool, comprising a lower mold frame, a component to be inspected is arranged on the top of the lower mold frame, the component to be inspected comprises a product cavity one, the product cavity one is placed on the top of the lower mold frame, the top of the product cavity one is clamped with a product cavity two, a plurality of filling air bags are placed in the product cavity one, a plurality of helium filling tubes for filling helium into the product cavity two are fixedly connected to the middle of the product cavity two, a plurality of helium exhaust tubes for exhausting helium are fixedly connected to both ends of the product cavity two, an accumulation component for accumulating helium leaking from the product cavity one is arranged on the outside of the product cavity one, and a helium inspection component for detecting the helium concentration in the accumulation component is arranged at the bottom of the lower mold frame.

[0008] Preferably, a first sealing strip is provided between the product cavity 1 and the product cavity 2, and the first sealing strip is clamped at the connection between the product cavity 1 and the product cavity 2.

[0009] Preferably, the helium filling tube is fixedly connected to a second gas valve, and the helium exhaust tube is fixedly connected to a first gas valve.

[0010] Preferably, the accumulation assembly includes an accumulation hood, the top of the accumulation hood is fixedly connected to a mounting frame, the four corners of the mounting frame are fixedly connected to sealing cylinders, the output ends of the four sealing cylinders are fixedly connected to the lower mold frame, the inner side of the accumulation hood is fixedly connected to a number of evenly distributed accumulation fans, one end of the accumulation hood is fixedly connected to an electrical connector connected to a power supply, and the several accumulation fans are electrically connected to the electrical connector.

[0011] Preferably, a second sealing strip is provided on the outer edge of the bottom of the accumulation cover, and the second sealing strip is clamped on the top of the lower mold frame.

[0012] Preferably, two leak test holes for detecting the sealing performance of the accumulation cover are provided at one end of the top of the accumulation cover, two exhaust holes are provided at the other end of the top of the accumulation cover, and a helium detection sampling hole is provided in the middle of the accumulation cover.

[0013] Preferably, the helium detection assembly includes a mounting panel fixedly connected to one end of the lower mold frame, one end of the mounting panel is fixedly connected to an air source connecting pipe connected to the air pump, the outlet end of the air source connecting pipe is connected to the air inlet of the filling air bag through a catheter, a helium detector is fixedly installed on the outer side of the mounting panel, the inlet end of the helium detector is connected to the helium detection sampling hole through a catheter, the other end of the mounting panel is fixedly connected to a helium connecting pipe connected to the helium supply equipment, the outlet end of the helium connecting pipe is connected to the helium filling tube, and the mounting panel is also fixedly connected to a helium outlet pipe connected to the helium exhaust pipe through a catheter.

[0014] Preferably, a vacuum pipe connected to the exhaust fan is fixedly connected to the installation panel, and the inlet end of the vacuum pipe is connected to the exhaust hole through a conduit. A vacuum detection pipe connected to the vacuum detection equipment is fixedly connected to the installation panel, and the inlet end of the vacuum detection pipe is connected to the leak test hole through a conduit.

[0015] Preferably, a seal is provided on the top of the lower mold frame, and the seal includes a plurality of rotary clamping cylinders evenly distributed along the outer edge of the product cavity one, and a plurality of the rotary clamping cylinders are fixedly connected to the top of the lower mold frame, and a plurality of the output ends of the rotary clamping cylinders are fixedly connected to pressure plates, and a plurality of the pressure plates are in contact with the outer edge of the product cavity two through rotation.

[0016] The present invention provides a cumulative helium detection method, which is implemented according to the cumulative helium detection tooling, including the following steps: S1: First, manually scan the QR code of the product, then put the product into the top inspection position of the lower mold frame, and then start all the rotary pressing cylinders to rotate the pressing plate and press the product, so that the product cavity 1 and the product cavity 2 are blocked; S2: Use a vacuum pump to evacuate the inside of product cavity 1 and product cavity 2 to -3~-3.5kp-1, then maintain the pressure, and detect whether there is a big leak inside the product cavity 1 and product cavity 2. If there is a big leak, an alarm will be issued to notify the staff to handle it. If not, continue to test; S3: Start the helium supply device to introduce helium into the helium filling tube through the helium pipe, and at the same time open the second gas valve so that the helium filling tube introduces helium into the product cavity 1 and the product cavity 2 for mixing. The pressure after helium filling is 3.0~3.5kp-; S4: Control all the sealing cylinders so that the accumulation hood contacts the top wall of the lower mold frame and forms a sealed structure inside the accumulation hood, and start all the accumulation fans at the same time so that the helium leaked from the product can be evenly dispersed into the internal space of the accumulation hood; S5: Open the air inlet valve of the helium detector so that the helium sampling hole can introduce the helium in the local area inside the accumulation cover into the helium detector for detection, and determine whether the product has leakage by detecting the helium concentration inside the accumulation cover; S6: After the detection is completed, the first air valve is opened to discharge the helium from the inside of the product cavity one and the product cavity two for recovery. At the same time, the air pump is used to inflate the filling airbag so that the filling airbag expands to reduce the internal volume of the product cavity one and the product cavity two, so that the residual helium in the product cavity one and the product cavity two is squeezed out to improve the recovery rate of the helium.

[0017] The working principle and beneficial effects of the present invention are:

[0018] 1. By adding helium into the helium filling tube, the product cavity 1 and the product cavity 2 are filled with helium. At this time, the internal pressure of the product cavity 1 increases and the filling airbag contracts, which can increase the amount of helium filled, so that the overall concentration of helium increases. In this way, the change of helium concentration can be better judged during the detection process. In addition, the filling airbag can be used to adjust the filling volume inside the product cavity 1, meeting the needs of filling different volumes of helium during the actual detection process.

[0019] 2. After the test is completed, the first air valve is opened to discharge the helium from the inside of the product cavity 1 and the product cavity 2 for recovery. At the same time, the air pump is used to inflate the filling airbag so that the filling airbag expands to reduce the internal volume of the product cavity 1 and the product cavity 2, so that the residual helium in the product cavity 1 and the product cavity 2 is squeezed out to improve the recovery rate of the helium. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 The structure of a helium inspection tool for the cumulative method of the present invention is schematically shown. Figure 1 ;

[0022] Figure 2 The structure of a helium inspection tool for the cumulative method of the present invention is schematically shown. Figure 2 ;

[0023] Figure 3 It is a structural schematic diagram of the component to be inspected of the present invention;

[0024] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0025] Figure 5 The structure of the accumulation assembly of the present invention is schematically shown Figure 1 ;

[0026] Figure 6The structure of the accumulation assembly of the present invention is schematically shown Figure 2 ;

[0027] Figure 7 It is a structural schematic diagram of the helium detection assembly of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the sealing member of the present invention.

[0029] In the figure: 1. lower mold frame; 2. accumulation component; 21. accumulation cover; 22. mounting frame; 23. sealing cylinder; 24. leak test hole; 25. helium detection sampling hole; 26. electrical connector; 27. accumulation fan; 28. second sealing strip; 29. ​​exhaust hole; 3. component to be inspected; 31. product cavity one; 32. product cavity two; 33. filling air bag; 34. helium filling tube; 341. second air valve; 35. first sealing strip; 36. helium exhaust tube; 361. first air valve; 4. helium detection component; 41. mounting panel; 42. gas source pipe; 43. helium detector; 44. vacuum detection pipe; 45. helium pipe; 46. vacuum pipe; 47. helium outlet pipe; 5. sealing; 51. rotating pressing cylinder; 52. pressing plate. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0031] like Figure 1 to Figure 8 As shown, this embodiment proposes a cumulative helium inspection tool, including a lower mold frame 1, a component to be inspected 3 is arranged on the top of the lower mold frame 1, and the component to be inspected 3 includes a product cavity 1 31, the product cavity 1 31 is placed on the top of the lower mold frame 1, and the top of the product cavity 1 31 is clamped with a product cavity 2 32, and a first sealing strip 35 is arranged between the product cavity 1 31 and the product cavity 2 32, and the first sealing strip 35 is clamped at the connection between the product cavity 1 31 and the product cavity 2 32, and a plurality of filling air bags 33 are placed in the product cavity 1 31. A plurality of helium filling tubes 34 for filling helium into the second product cavity 32 are fixedly connected to the middle part of the second product cavity 32, and a plurality of helium exhaust tubes 36 for exhausting helium are fixedly connected to both ends of the second product cavity 32, a second gas valve 341 is fixedly connected to the helium filling tube 34, and a first gas valve 361 is fixedly connected to the helium exhaust tube 36. An accumulation component 2 for accumulating helium leaked from the first product cavity 31 is arranged on the outer side of the first product cavity 31, and a helium detection component 4 for detecting the helium concentration in the accumulation component 2 is arranged at the bottom end of the lower mold frame 1;

[0032] By adding helium into the helium filling tube 34, the product cavity 1 31 and the product cavity 2 32 are filled with helium. At this time, the pressure inside the product cavity 1 31 increases and the filling airbag 33 contracts, so that more helium can be filled, so that the overall concentration of helium increases, so that the change of helium concentration can be better judged during the detection process, and the filling airbag 33 can be used to adjust the filling volume inside the product cavity 1 31 to meet the different volume helium filling requirements during the actual detection process;

[0033] After the detection is completed, the first air valve 361 is opened to allow the helium to be discharged from the inside of the product cavity 1 31 and the product cavity 2 32 for recovery, and at the same time, the filling airbag 33 is inflated by the air pump to expand the filling airbag 33 to reduce the internal volume of the product cavity 1 31 and the product cavity 2 32, so that the residual helium in the product cavity 1 31 and the product cavity 2 32 is squeezed out to improve the recovery rate of the helium.

[0034] Furthermore, the accumulation assembly 2 includes an accumulation hood 21, the top of which is fixedly connected to a mounting frame 22, the four corners of which are fixedly connected to sealing cylinders 23, the output ends of the four sealing cylinders 23 are fixedly connected to the lower mold frame 1, a number of evenly distributed accumulation fans 27 are fixedly connected to the inner side of the accumulation hood 21, one end of the accumulation hood 21 is fixedly connected to an electrical connector 26 connected to a power source, and the several accumulation fans 27 are electrically connected to the electrical connector 26, a second sealing strip 28 is provided on the outer edge of the bottom of the accumulation hood 21, and the second sealing strip 28 is clamped on the top of the lower mold frame 1, one end of the top of the accumulation hood 21 is provided with two leak test holes 24 for detecting the sealing of the accumulation hood 21, the other end of the top of the accumulation hood 21 is provided with two exhaust holes 29, and a helium detection sampling hole 25 is provided in the middle of the accumulation hood 21.

[0035] During detection, helium is added to the helium filling tube 34 so that the product cavity 1 31 and the product cavity 2 32 are filled with helium, and then all the sealing cylinders 23 are controlled to make the accumulation hood 21 contact with the top wall of the lower mold frame 1 and form a sealing structure inside the accumulation hood 21. At the same time, all the accumulation fans 27 are started so that the helium leaked from the product can be evenly dispersed into the internal space of the accumulation hood 21. In this way, the change of helium concentration inside the accumulation hood 21 can be better reflected when sampling and detecting at the helium detection sampling hole 25, thereby improving the accuracy of detection.

[0036] Furthermore, the helium detection assembly 4 includes a mounting panel 41 fixedly connected to one end of the lower mold frame 1, one end of the mounting panel 41 is fixedly connected to an air source pipe 42 connected to the air pump, the outlet end of the air source pipe 42 is connected to the air inlet of the filling airbag 33 through a conduit, a helium detector 43 is fixedly installed on the outer side of the mounting panel 41, the inlet end of the helium detector 43 is connected to the helium detection sampling hole 25 through a conduit, the other end of the mounting panel 41 is fixedly connected to a helium pipe 45 connected to a helium supply device, the outlet end of the helium pipe 45 is connected to the helium filling tube 34, the mounting panel 41 is also fixedly connected to a helium outlet pipe 47 connected to the helium exhaust pipe 36 through a conduit, a vacuum pipe 46 connected to the exhaust fan is fixedly connected to the mounting panel 41, the inlet end of the vacuum pipe 46 is connected to the exhaust hole 29 through a conduit, a vacuum detection pipe 44 connected to the vacuum detection device is fixedly connected to the mounting panel 41, and the inlet end of the vacuum detection pipe 44 is connected to the leak test hole 24 through a conduit.

[0037] Before the helium test, the vacuum test device is connected to the vacuum test pipe 44, and the vacuum test device is started to test the vacuum tightness inside the accumulation cover 21. After confirming that the tightness inside the accumulation cover 21 meets the requirements, a subsequent test is performed to avoid the insufficient tightness inside the accumulation cover 21 affecting the test results;

[0038] During helium inspection, by opening the air inlet valve of the helium detector 43, the helium inspection sampling hole 25 introduces the helium in the local area inside the accumulation cover 21 into the helium detector 43 for inspection. By detecting the helium concentration inside the accumulation cover 21, it is determined whether the product has a leak. The whole process is convenient to detect and has high sensitivity.

[0039] Furthermore, a seal 5 is provided on the top of the lower mold frame 1, and the seal 5 includes a plurality of rotary clamping cylinders 51 evenly distributed along the outer edge of the product cavity 1 31, and the plurality of rotary clamping cylinders 51 are fixedly connected to the top of the lower mold frame 1, and the output ends of the plurality of rotary clamping cylinders 51 are fixedly connected to pressure plates 52, and the plurality of pressure plates 52 are in contact with the outer edge of the product cavity 2 32 by rotating.

[0040] By starting all the rotating clamping cylinders 51, the pressure plate 52 rotates and contacts the top wall of the product, so that the product cavity 1 31 and the product cavity 2 can be sealed, thereby improving the sealing of the connection between the product cavity 1 31 and the product cavity 2, avoiding interference in the detection of product leakage points and affecting the accuracy of the detection results. Example

[0041] The present invention provides a cumulative helium detection method, which is implemented according to the cumulative helium detection tooling, including the following steps: S1: First, manually scan the QR code of the product, then put the product into the top inspection position of the lower mold frame 1, and then start all the rotating and pressing cylinders 51 to make the pressing plate 52 rotate and press the product, so that the product cavity 1 31 and the product cavity 2 32 are blocked; S2: The inside of the product cavity 1 31 and the product cavity 2 32 are evacuated to -3kp- by a vacuum pump, and then the pressure is maintained to detect whether there is a large leak inside the product cavity 1 31 and the product cavity 2 32. If there is a large leak, an alarm is issued to notify the staff to handle it. If not, the detection is continued; S3: Start the helium supply device to introduce helium into the helium filling tube 34 through the helium pipe 45, and at the same time open the second gas valve 341 so that the helium filling tube 34 introduces the helium into the product cavity 1 31 and the product cavity 2 32 for mixing. The pressure after helium filling is 3.0 kp-1; S4: Control all the sealing cylinders 23 so that the accumulation cover 21 contacts the top wall of the lower mold frame 1 and forms a sealed structure inside the accumulation cover 21, and start all the accumulation fans 27 at the same time so that the helium leaked from the product can be evenly dispersed into the internal space of the accumulation cover 21; S5: Opening the air inlet valve of the helium detector 43 allows the helium detection sampling hole 25 to introduce the helium in a local area inside the accumulation cover 21 into the helium detector 43 for detection, and judging whether the product has leakage by detecting the helium concentration inside the accumulation cover 21; S6: After the detection is completed, the first air valve 361 is opened to allow the helium to be discharged from the inside of the product cavity 1 31 and the product cavity 2 32 for recovery. At the same time, the filling airbag 33 is inflated by the air pump to expand the filling airbag 33 to reduce the internal volume of the product cavity 1 31 and the product cavity 2 32, so that the residual helium in the product cavity 1 31 and the product cavity 2 32 is squeezed out to improve the recovery rate of the helium. Example

[0042] The present invention provides a cumulative helium detection method, which is implemented according to the cumulative helium detection tooling, including the following steps: S1: First, manually scan the QR code of the product, then put the product into the top inspection position of the lower mold frame 1, and then start all the rotating and pressing cylinders 51 to make the pressing plate 52 rotate and press the product, so that the product cavity 1 31 and the product cavity 2 32 are blocked; S2: Use a vacuum pump to evacuate the inside of the product cavity 1 31 and the product cavity 2 32 to -3.5kp-, then maintain the pressure, and detect whether there is a big leak inside the product cavity 1 31 and the product cavity 2 32. If there is a big leak, an alarm will be issued to notify the staff to handle it. If not, continue to detect; S3: Start the helium supply device to introduce helium into the helium filling tube 34 through the helium pipe 45, and at the same time open the second gas valve 341 so that the helium filling tube 34 introduces the helium into the product cavity 1 31 and the product cavity 2 32 for mixing. The pressure after helium filling is 3.5 kp-1; S4: Control all the sealing cylinders 23 so that the accumulation cover 21 contacts the top wall of the lower mold frame 1 and forms a sealed structure inside the accumulation cover 21, and start all the accumulation fans 27 at the same time so that the helium leaked from the product can be evenly dispersed into the internal space of the accumulation cover 21; S5: Opening the air inlet valve of the helium detector 43 allows the helium detection sampling hole 25 to introduce the helium in a local area inside the accumulation cover 21 into the helium detector 43 for detection, and judging whether the product has leakage by detecting the helium concentration inside the accumulation cover 21; S6: After the detection is completed, the first air valve 361 is opened to allow the helium to be discharged from the inside of the product cavity 1 31 and the product cavity 2 32 for recovery. At the same time, the filling airbag 33 is inflated by the air pump to expand the filling airbag 33 to reduce the internal volume of the product cavity 1 31 and the product cavity 2 32, so that the residual helium in the product cavity 1 31 and the product cavity 2 32 is squeezed out to improve the recovery rate of the helium.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cumulative helium inspection tool, comprising a lower mold frame (1), characterized in that: A component to be inspected (3) is arranged on the top of the lower mold frame (1), and the component to be inspected (3) comprises a product cavity one (31), the product cavity one (31) is placed on the top of the lower mold frame (1), a product cavity two (32) is clamped on the top of the product cavity one (31), a plurality of filling air bags (33) are arranged in the product cavity one (31), a plurality of helium filling tubes (34) for filling helium into the product cavity two (32) are fixedly connected to the middle of the product cavity two (32), a plurality of helium exhaust tubes (36) for exhausting helium are fixedly connected to both ends of the product cavity two (32), an accumulation component (2) for accumulating helium leaked from the product cavity one (31) is arranged on the outside of the product cavity one (31), and a helium detection component (4) for detecting the helium concentration in the accumulation component (2) is arranged at the bottom of the lower mold frame (1).

2. The cumulative helium inspection tool according to claim 1, characterized in that: A first sealing strip (35) is provided between the first product cavity (31) and the second product cavity (32), and the first sealing strip (35) is clamped at the connection between the first product cavity (31) and the second product cavity (32).

3. The cumulative helium inspection tool according to claim 1, characterized in that: The helium filling tube (34) is fixedly connected to a second gas valve (341), and the helium exhaust tube (36) is fixedly connected to a first gas valve (361).

4. The cumulative helium inspection tool according to claim 3, characterized in that: The accumulation assembly (2) comprises an accumulation cover (21), the top of the accumulation cover (21) is fixedly connected to a mounting frame (22), the four corners of the mounting frame (22) are fixedly connected to sealing cylinders (23), the output ends of the four sealing cylinders (23) are fixedly connected to the lower mold frame (1), the inner side of the accumulation cover (21) is fixedly connected to a plurality of evenly distributed accumulation fans (27), one end of the accumulation cover (21) is fixedly connected to an electrical connector (26) connected to a power source, and the plurality of accumulation fans (27) are electrically connected to the electrical connector (26).

5. The cumulative helium inspection tool according to claim 4, characterized in that: A second sealing strip (28) is provided on the outer edge of the bottom of the accumulation cover (21), and the second sealing strip (28) is clamped on the top of the lower mold frame (1).

6. The cumulative helium inspection tool according to claim 4, characterized in that: One end of the top of the accumulation cover (21) is provided with two leak test holes (24) for detecting the sealing performance of the accumulation cover (21), the other end of the top of the accumulation cover (21) is provided with two exhaust holes (29), and the middle of the accumulation cover (21) is provided with a helium detection sampling hole (25).

7. The cumulative helium inspection tool according to claim 6, characterized in that: The helium detection assembly (4) comprises a mounting panel (41) fixedly connected to one end of the lower mold frame (1); one end of the mounting panel (41) is fixedly connected to an air source pipe (42) connected to an air pump; the outlet end of the air source pipe (42) is connected to an air inlet of a filling air bag (33) through a conduit; a helium detector (43) is fixedly mounted on the outer side of the mounting panel (41); the inlet end of the helium detector (43) is connected to a helium detection sampling hole (25) through a conduit; the other end of the mounting panel (41) is fixedly connected to a helium pipe (45) connected to a helium supply device; the outlet end of the helium pipe (45) is connected to a helium filling tube (34); and the mounting panel (41) is also fixedly connected to a helium outlet pipe (47) connected to a helium exhaust pipe (36) through a conduit.

8. The cumulative helium inspection tool according to claim 7, characterized in that: A vacuum pipe (46) connected to the exhaust fan is fixedly connected to the installation panel (41), and an inlet end of the vacuum pipe (46) is connected to the exhaust hole (29) via a conduit. A vacuum detection pipe (44) connected to the vacuum detection equipment is fixedly connected to the installation panel (41), and an inlet end of the vacuum detection pipe (44) is connected to the leak test hole (24) via a conduit.

9. The cumulative helium inspection tool according to claim 8, characterized in that: A sealing member (5) is provided at the top of the lower mold frame (1), and the sealing member (5) comprises a plurality of rotary pressing cylinders (51) evenly distributed along the outer edge of the first product cavity (31), and the plurality of rotary pressing cylinders (51) are fixedly connected to the top of the lower mold frame (1), and the output ends of the plurality of rotary pressing cylinders (51) are fixedly connected to a pressing plate (52), and the plurality of pressing plates (52) are in contact with the outer edge of the second product cavity (32) by rotating.

10. A cumulative helium inspection method, implemented according to the cumulative helium inspection tooling according to claim 9, characterized in that: The steps include: S1: First, manually scan the QR code of the product, then place the product into the top inspection position of the lower mold frame (1), then start all the rotating and pressing cylinders (51) to rotate the pressing plate (52) and press the product, so that the product cavity 1 (31) and the product cavity 2 (32) are sealed; S2: Use a vacuum pump to evacuate the interior of the product cavity 1 (31) and the product cavity 2 (32) to -3~-3.5kp-, then maintain the pressure, and detect whether there is a large leak inside the product cavity 1 (31) and the product cavity 2 (32). If there is a large leak, an alarm will be issued to notify the staff to handle it. If not, continue to detect; S3: Start the helium supply device to introduce helium into the helium filling tube (34) through the helium pipe (45), and at the same time open the second gas valve (341) so that the helium filling tube (34) introduces the helium into the product cavity 1 (31) and the product cavity 2 (32) for mixing. After the helium filling, the pressure is 3.0-3.5 kp-1; S4: controlling all the sealing cylinders (23) so that the accumulation cover (21) contacts the top wall of the lower mold frame (1) and forms a sealed structure inside the accumulation cover (21), and simultaneously starting all the accumulation fans (27) so that the helium leaked from the product can be evenly dispersed into the internal space of the accumulation cover (21); S5: opening the air inlet valve of the helium detector (43) so that the helium detection sampling hole (25) introduces the helium in a local area inside the accumulation cover (21) into the helium detector (43) for detection, and judging whether the product has a leak by detecting the helium concentration inside the accumulation cover (21); S6: After the detection is completed, the first air valve (361) is opened to discharge the helium from the interior of the product cavity one (31) and the product cavity two (32) for recovery, and at the same time, the filling air bag (33) is inflated by the air pump, so that the filling air bag (33) expands to reduce the internal volume of the product cavity one (31) and the product cavity two (32), so that the residual helium in the product cavity one (31) and the product cavity two (32) is squeezed out to improve the recovery rate of the helium.

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