Full-automatic helium detection device

Abstract

The invention discloses a full-automatic helium detection device, which relates to the technical field of helium detection, and comprises a supporting table and a vacuum cylinder arranged on the supporting table, a vertical column is vertically fixed on one side of the upper end of the supporting table, an air cylinder is fixed on the upper side of an extension part, and the telescopic end of the air cylinder slidably passes through an extension cross beam and then is fixed with a cylinder cover; an air outlet of the high-pressure pump is connected with an inflation pipe which penetrates through the cylinder cover and extends to the position below the cylinder cover, the expansion frame is sleeved with a rubber sealing sleeve, the bottom of the rubber sealing sleeve can wrap an opening in the outer wall of the end of the inflation pipe, the position of the tray can be adjusted in the vacuum cylinder, a plurality of connecting plates are fixed to the edge of the upper end of the tray, and clamping plates are connected to the connecting plates. Due to the fact that the rubber sealing sleeve which can be in butt joint with the object detection opening and is large in upper portion and small in lower portion is arranged, the sealing detection requirements of the object detection openings with different calibers are met, and the problems that in traditional helium detection, due to the fact that butt joint of a helium inflation pipe and the object detection openings consumes long time, the detection efficiency is not high, and the large detection requirement cannot be met are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of helium leak detection, and specifically to a fully automatic helium leak detection device. Background Technique

[0002] In many industrial productions, helium leak detection is required. Helium leak detection is to evacuate the product to be detected and then fill it with helium gas at a certain pressure. The outside of the product to be detected is a vacuum space with certain vacuum degree requirements. The vacuum space is connected to the leak port of the helium leak detector. If there is a leak in the workpiece to be detected, the helium gas leaking into the vacuum space can be detected by the helium leak detector.

[0003] When the traditional helium leak detector is detecting, since the inner diameters of the detection ports of items with different volumes are not unique, it is necessary to replace the docking pipe orifices with different diameters to match the detection ports of the items. This results in a long time-consuming when the helium gas filling pipe is docked with the item detection port, leading to low detection efficiency and inability to meet the detection requirements with a large output. Therefore, a fully automatic helium leak detection device is designed here to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully automatic helium leak detection device to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A fully automatic helium leak detection device, including a support platform and a vacuum cylinder arranged on the support platform. The bottom wall of the vacuum cylinder is fixed with a helium mass spectrometer leak detector, and the detection port of the helium mass spectrometer leak detector is connected with a vacuum pipe extending to the inner bottom wall of the vacuum cylinder. A vacuum pump is arranged on the outer wall of the vacuum cylinder, and the air inlet of the vacuum pump is communicated with the inside of the vacuum cylinder.

[0006] It further includes: a column, fixedly arranged on one side of the upper end of the support platform, and a horizontal extension part is arranged at the top of the side wall of the column;

[0007] A cylinder, fixed on the upper side of the extension part, and its telescopic end slides through the extension cross beam and is fixed with a cylinder cover. The cylinder stretches to drive the cylinder cover to fall and cover the orifice of the vacuum cylinder, and the vacuum cylinder is in a relatively sealed state.

[0008] A high-pressure pump, arranged on the cylinder cover, is used to provide helium gas. The air outlet of the high-pressure pump is connected with a filling pipe that passes through the cylinder cover and extends below the cylinder cover. The end of the filling pipe is hinged with a plurality of support plates;

[0009] A torsion spring is provided at the hinge between the inflation tube and the support plate, and the torque of the torsion spring is used to flip multiple support plates along the circumferential direction of the outer side of the inflation tube to form an expansion frame. A rubber sleeve is sleeved on the outside of the expansion frame, and the bottom of the rubber sleeve can wrap around the opening of the outer wall of the end of the inflation tube. The rubber sleeve is larger at the top and smaller at the bottom, and the inner wall of the rubber sleeve is fixedly connected to the outer walls of multiple support plates. After the inflation tube is inserted into the inspection port of the object to be inspected, the expansion frame composed of multiple support frames enters the inspection port, and the outer wall of the rubber sleeve outside the expansion support frame forms a sealing area that blocks the inner wall of the inspection port opening.

[0010] The rubber seal outside the inflation tube and the expansion frame is inserted into the detection port, and the outer wall of the rubber seal is pressed against the inner wall of the detection port. Driven by the torsional potential energy of the torsion spring, multiple support plates are flipped around the end of the inflation tube to the side away from the inflation tube, and the rubber seal is stretched open, so that the rubber seal is larger at the top and smaller at the bottom. The rubber seal uses its outer wall to press against the inner peripheral wall of the opening of the object detection port with different opening sizes to block the detection port, ensuring that helium will not overflow from the detection port when the inflation tube is inflated.

[0011] It also includes a tray that can adjust its position in the vacuum cylinder. A plurality of connecting plates are fixed to the upper edge of the tray. Clamps are connected to the connecting plates. The plurality of clamps form a clamping frame for clamping materials of different sizes.

[0012] Furthermore, a plurality of hinged rods are hinged on the upper end of the outer wall of the inflation tube, and the ends of the hinged rods are hinged to the top of the inner wall of the support plate.

[0013] Furthermore, the upper end of the support plate is bent into a horizontal extension portion, and the horizontal extension portion serves as a limiting component of the detection port with a larger opening to prevent the entire expansion frame from completely entering the detection port and being unable to be quickly pulled out.

[0014] Furthermore, the upper end of the clamping plate is tilted upward and away from the tray.

[0015] Furthermore, the side wall of the connecting plate is provided with a through slide groove, the bottom of the through slide groove is a rectangular structure, and the top is a circular structure, the bottom of the clamping plate is provided with a connecting notch, and a rectangular block is fixed between the two side walls in the connecting notch, and the rectangular block is slidably engaged with the rectangular structure of the through slide groove, and the diagonal length of the rectangular slider is equal to the inner diameter of the circular structure. The clamping plate slides down to the bottom along the rectangular structure of the through slide groove by using the rectangular slider, and the rectangular slider itself is matched with the rectangular structure, and the rectangular slider cannot flip over at the rectangular structure of the through slide groove. At this time, the clamping position of the clamping rack composed of multiple clamps in the horizontal direction does not change, so the items placed in the clamping rack will not be offset.

[0016] After the detection is completed and the item needs to be taken out of the clamping rack, since the item is clamped in the clamping rack and is in close contact with the inner side wall of the clamping plate, there is a large static friction force. Therefore, it is quite laborious to take it. At this time, only need to lift the clamping plate upward, and the rectangular slider will slide along the rectangular structure passing through the chute into the circular structure. Since the diagonal length of the rectangular slider is equal to the inner diameter of the circular structure, flipping the rectangular slider in the circular structure can expand the upper opening of the clamping rack, and the clamping force on the outer wall of the item is lost, which is convenient for taking the item after the detection is completed.

[0017] Further, a swing rod is hinged at the edge position of the inner bottom wall of the vacuum cylinder. The swing rod horizontally flips at the bottom of the vacuum cylinder around the rotation position. An adjustment hole is opened through the upper and lower side walls of the swing rod. A connecting rod fixedly slidably passing through the adjustment hole is fixed on the bottom wall of the tray. A limiting disc slidably attached to the bottom wall of the swing rod is fixed to the bottom wall of the connecting rod.

[0018] Further, a guiding member is provided inside the vacuum cylinder. The guiding member includes:

[0019] Two symmetrically distributed inverted L-shaped plates;

[0020] And guiding rings fixed to the lower side walls of the ends of the two inverted L-shaped plates. Clamping interfaces for the two inverted L-shaped plates to slide and be clamped are opened on the inner wall of the vacuum cylinder.

[0021] Further, two pin shafts are symmetrically fixed to the outer wall of the vacuum cylinder. Two support plates are vertically fixed to the upper end of the support platform. Insertion grooves are opened on the opposite side walls of the two support plates. The end of the pin shaft is rotatably inserted into the inner wall of the insertion groove.

[0022] Further, a receiving groove is opened on the inner wall of the insertion groove. A baffle plate capable of flipping in the receiving groove is fixed to the bottom wall of the pin shaft.

[0023] The flipping angle of the baffle plate in the receiving groove is within the range of 0-90°.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The present invention is a fully automatic helium leak detection device. The item to be detected is fixedly placed on a clamping rack composed of a plurality of clamping plates. Since a rubber seal sleeve with a larger upper part and a smaller lower part that can be docked with the detection port of the item is provided, the sealing detection requirements for the detection ports of items with different diameters are met. The cylinder is stretched to drive the cylinder cover to fall and automatically cover the opening of the vacuum cylinder. The vacuum cylinder is in a relatively sealed state. The helium mass spectrometer leak detector is used to accurately and automatically detect whether there is helium leakage on the surface of the item in a relatively vacuum environment, solving the problem that the detection efficiency is not high due to the long time-consuming docking of the helium gas filling pipe and the detection port of the item during traditional helium leak detection, and it cannot meet the detection requirements with a large production volume. Description of the Drawings

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the vacuum cylinder structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the guide member structure of the present invention;

[0029] Figure 4 This is an assembly schematic diagram of the support plate and the pin shaft of the present invention;

[0030] Figure 5 This is a partial cross-sectional view of the cylinder cover and the charging pipe of the present invention;

[0031] Figure 6 This is an assembly schematic diagram of the rubber seal and multiple support plates of the present invention;

[0032] Figure 7 This is a half-sectional view of the vacuum cylinder of the present invention;

[0033] Figure 8 This is a distribution schematic diagram of multiple clamping plates of the present invention;

[0034] Figure 9 This is an assembly schematic diagram of the tray and the limit plate of the present invention;

[0035] Figure 10 This is an assembly schematic diagram of the connecting plate and the rectangular block of the present invention.

[0036] In the figure: 1, support platform; 2, column; 3, cylinder; 4, cylinder cover; 41, charging pipe; 42, support plate; 43, rubber seal; 44, hinge rod; 5, high-pressure pump; 6, vacuum cylinder; 61, support plate; 62, clamping plate; 63, inverted L-shaped plate; 64, guide ring; 65, pin shaft; 66, baffle; 67, tray; 68, swing rod; 69, rectangular slider; 610, connecting plate; 611, limit plate; 7, helium mass spectrometer leak detector. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] This embodiment provides a fully automatic helium detection device, including a support platform 1 and a vacuum cylinder 6 arranged on the support platform 1. A helium mass spectrometer leak detector 7 is fixed to the bottom wall of the vacuum cylinder 6, and the detection port of the helium mass spectrometer leak detector 7 is connected to a vacuum tube extending to the inner bottom wall of the vacuum cylinder 6. The vacuum tube is used as a detection port, and the helium mass spectrometer leak detector 7 is used as a helium leak detection instrument in the vacuum cylinder 6. A vacuum pump is provided on the outer wall of the vacuum cylinder 6, and the air inlet of the vacuum pump is connected to the vacuum cylinder 6. During the detection process, the vacuum pump draws the vacuum cylinder 6 into a relative vacuum state, thereby improving the detection accuracy of the helium mass spectrometer leak detector 7. Figure 1 and Figure 7 shown.

[0039] A column 2 is vertically fixed on one side of the upper end of the support platform 1, and an extension portion is horizontally provided on the top of the side wall of the column 2. A cylinder 3 is fixed on the upper side of the extension portion. A cylinder cover 4 is fixed after the telescopic end of the cylinder 3 slides through the extension beam. The cylinder 3 stretches and drives the cylinder cover 4 to fall and automatically cover the mouth of the vacuum cylinder 6. The vacuum cylinder 6 is in a relatively closed state. Figure 1 After the test is finished, the telescopic end of the air cylinder 3 is retracted, and the cylinder cover 4 is lifted up and separated from the upper opening of the vacuum cylinder 6, so that the items can be taken out conveniently.

[0040] The cylinder cover 4 is provided with a high-pressure pump 5 for providing helium. The air inlet of the high-pressure pump 5 is connected to a tank storing helium to provide helium. The air outlet of the high-pressure pump 5 is connected to an inflation tube 41 that passes through the cylinder cover 4 and extends to the bottom of the cylinder cover 4. The end of the inflation tube 41 is hinged with a plurality of support plates 42, and a torsion spring is provided at the hinge. The torque of the torsion spring is used to flip the plurality of support plates 42 along the outer circumference of the inflation tube 41 to form an expansion frame. Figure 5 and Figure 6 The expansion frame shown. A rubber seal 43 is sleeved on the outside of the expansion frame, and the bottom of the rubber seal 43 can wrap around the opening of the outer wall of the end of the inflation tube 41. The inner wall of the rubber seal 43 is fixedly connected to the outer walls of multiple support plates 42. After the object to be detected is placed in the vacuum tube 6, the object detection port is located below the end of the inflation tube 41. After the tube cover 4 falls and covers the opening of the vacuum tube 6, the inflation tube 41 and the rubber seal 43 outside the expansion frame can be inserted into the detection port. At the same time, the outer wall of the rubber seal 43 is against the inner wall of the detection. Driven by the torsional potential energy of the torsion spring, the multiple support plates 42 turn around the end of the inflation tube 41 to the side away from the inflation tube 41, and the rubber seal 43 is opened, so that the rubber seal 43 is larger at the top and smaller at the bottom. The rubber seal 43 uses its outer wall to press against the inner peripheral wall of the opening of the object detection port of different opening sizes to block the detection port, ensuring that helium will not overflow from the detection port when the inflation tube 41 is inflated.

[0041] The diffusion range of the upper end of the rubber seal 43 is adapted to the maximum diameter of the inspection port of the object. If the inspection port exceeds the upper diameter of the rubber seal 43, it is necessary to replace the rubber seal 43 with a larger radius and the support plate 42 that can expand the rubber seal 43 to a larger range.

[0042] The cylinder 3 stretches, extending the gas filling pipe 41 into the detection port. By sliding the outer wall of the rubber seal 43 along the inner side wall of the detection port, the support plate 42 can be reversely flipped along the position hinged to the bottom side wall of the gas filling pipe 41, generating a large flipping potential energy, reducing the expansion space of the expansion frame, and also reducing the expansion deformation of the rubber seal 43. At this time, the condition that must be met for the torsional potential energy of the torsion spring is that the flipping potential energy of the torsion spring is used to tightly press the rubber seal 43 against the inner side wall of the detection port through the support plate 42, which also plays a role in blocking the detection port.

[0043] It solves the problem that in traditional helium detection, the docking of the helium gas filling pipe 41 with the article detection port takes a long time, resulting in low detection efficiency and inability to meet the detection requirements with a large production volume.

[0044] It also includes a tray 67 that can be adjusted in position within the vacuum cylinder 6. Multiple connecting plates 610 are fixed to the upper edge of the tray 67, and clamping plates 62 are connected to the connecting plates 610. The multiple clamping plates 62 form a material clamping rack for clamping articles of different volumes. As Figure 7 、 Figure 8 and Figure 9 shown, the article to be detected is fixedly placed on the material clamping rack formed by the multiple clamping plates 62, and the position of the detection port is made to be directly opposite to the gas filling pipe 41 by moving the tray 67 within the vacuum cylinder 6.

[0045] After the article is adjusted to the correct position, helium gas with a certain pressure is filled into the article to be detected. The workpiece is placed into the vacuum cylinder 6 with a certain vacuum degree requirement and connected to the leak detection port of the helium mass spectrometer 7. When the gas mixed with leaked helium reaches the ion generator in the helium mass spectrometer 7, it is ionized by the electron beam emitted by the filament; the ions are accelerated by a specific voltage and then fly into the magnetic field in the helium mass spectrometer 7 for deflection; according to different masses, different deflection radii are obtained, and the helium ions are screened out to reach the analysis tube, generating a microcurrent; after high-performance low-noise amplification, a readable current signal is obtained, and the leak rate relationship is established through calibration, thereby determining the leak rate. Through the above steps, the leakage situation of the workpiece can be effectively detected.

[0046] It should be noted that the advantage of automatic helium detection is fast and accurate, and it can be automatically controlled, which is particularly suitable for leak detection of large containers or products with complex structures. However, since different containers have different permeabilities and adsorption properties for different gases, it is necessary to select a suitable helium mass spectrometer 7 to meet the detection requirements.

[0047] A plurality of hinge rods 44 are hinged to the upper end outer wall of the gas filling pipe 41, and the end of the hinge rod 44 is hinged to the top of the inner side wall of the support plate 42. As Figure 4As shown, an additional hinge rod 44 is provided. When the inflation tube 41 is lowered into the object detection port, the hinge rod 44 is used to expand the upper end of the support plate 42 to a larger extent, thereby enhancing the sealing performance of the outer wall of the rubber sleeve 43 against the inner wall of the object detection port.

[0048] In addition, the upper end of the support plate 42 is bent into a horizontal extension portion. After the inflation tube 41 is inserted into the detection port of the object to be detected, the expansion frame composed of multiple support frames enters the detection port, and the outer wall of the rubber cover 43 outside the expansion support frame forms a sealing area that blocks the inner wall of the detection port opening. The horizontal extension portion serves as a limiting component for the detection port with a larger opening to prevent the entire expansion frame from completely entering the detection port and being unable to be quickly pulled out.

[0049] like Figure 7 As shown, the upper end of the clamping plate 62 is tilted upward and away from the tray 67, so that the upper end opening of the clamping frame is larger and suitable for larger objects to be inspected.

[0050] A swing rod 68 is hinged at the edge of the bottom wall of the vacuum cylinder 6, and the swing rod 68 flips horizontally at the bottom of the vacuum cylinder 6 around the rotation position. The swing rod 68 is provided with an adjustment hole that passes through the upper and lower side walls of the swing rod 68. The bottom wall of the tray 67 is fixed with a connecting rod that slides through the adjustment hole. The bottom wall of the connecting rod is fixed with a limit plate 611 that slides with the bottom wall of the swing rod 68. The tray 67 is limited by the limit plate 611, so that the tray 67 and the multiple clamps 62 can only be adjusted along the distribution direction of the adjustment holes of the swing rod 68, and cannot be adjusted in the up and down directions. By flipping the swing rod 68 horizontally at the bottom of the vacuum cylinder 6 around the rotation position, the position of the objects clamped on the inner side of the multiple clamps 62 can be adjusted to ensure that the adjusted object detection port is located directly below the inflation tube 41.

[0051] like Figure 1 and Figure 3 As shown, in order to further accurately adjust the position of the item detection port to be located directly below the inflation tube 41, a guide member is provided in the vacuum tube 6, and the guide member includes two symmetrically distributed inverted L-shaped plates 63 and a guide ring 64 fixed to the lower side wall of the end of the two inverted L-shaped plates 63. The inner wall of the vacuum tube 6 is provided with a card interface for the sliding card connection of the two inverted L-shaped plates 63. After the item is clamped in the multiple clamps 62, the two inverted L-shaped plates 63 are slid down along the corresponding card interface. At the same time, the position of the clamp 62 on the tray 67 is adjusted by swinging the swing rod 68 and the distribution direction of the adjustment holes along the swing rod 68. The guide ring 64 is used as a reference for comparing the end of the inflation tube 41, and the guide ring 64 is coaxially distributed with the inflation tube 41. As long as the guide ring 64 is distributed vertically opposite to the item detection port, this means that after the tube cover 4 is closed, the inflation tube 41 can be accurately inserted into the item detection port.

[0052] The side wall of the connecting plate 610 is provided with a through chute. The bottom of the through chute is of a rectangular structure, and the top is of a circular structure. A connecting notch is opened at the bottom of the clamping plate 62. A rectangular block is fixed between the two side walls inside the connecting notch. The rectangular block is slidably clamped with the rectangular structure of the through chute. As Figure 8 , Figure 9 and Figure 10 shown, the clamping plate 62 slides down to the bottom along the rectangular structure of the through chute by using the rectangular slider 69. By using the structure of the rectangular slider 69 itself to match the rectangular structure, the rectangular slider 69 cannot be flipped at the rectangular structure part of the through chute. At this time, the clamping positions of the clamping racks formed by multiple clamping plates 62 in the horizontal direction do not change. Therefore, the items placed in the clamping racks will not shift in position.

[0053] After the detection is completed, when the item needs to be taken out of the clamping rack, since the item is stuck in the clamping rack and is in close contact with the inner side wall of the clamping plate 62, there is a large static friction force. Therefore, it is relatively laborious to take it. At this time, only need to lift the clamping plate 62 upward, and the rectangular slider 69 will slide along the rectangular structure of the through chute into the circular structure. Since the diagonal length of the rectangular slider 69 is equal to the inner diameter of the circular structure, the rectangular slider 69 is flipped in the circular structure, so that the upper opening of the clamping rack can be enlarged, and the clamping force on the outer wall of the item is lost, which is convenient for taking the item after the detection is completed.

[0054] Two pin shafts 65 are symmetrically fixed on the outer wall of the vacuum cylinder 6. Two support plates 61 are vertically fixed on the upper end of the support platform 1. Plugging grooves are opened on the opposite side walls of the two support plates 61. The end of the pin shaft 65 is rotatably plugged with the inner wall of the plugging groove. As Figure 2 shown, the vacuum cylinder 6 is flipped from the vertical state to the horizontal state by using the pin shaft 65 in the plugging groove of the support plate 61, so that the opening of the vacuum cylinder 6 faces away from the column 2. After the detection is completed, it is convenient to take out the item from the opening of the vacuum cylinder 6.

[0055] Further, a receiving groove is opened on the inner wall of the plugging groove. A baffle 66 that can be flipped in the receiving groove is fixed on the bottom wall of the pin shaft 65, and the flipping angle of the baffle 66 in the receiving groove is within the range of 0-90°. As Figure 4 shown, when the vacuum cylinder 6 is in the vertical state, the baffle 66 abuts against the bottom side wall inside the receiving groove, and the vacuum cylinder 6 will not be flipped excessively, affecting the fall of the cylinder cover 4 to cover the vacuum cylinder 6. In addition, after the detection is completed, after the vacuum cylinder 6 is flipped from the vertical state to the horizontal state, the baffle 66 abuts against the top wall inside the receiving groove, preventing the vacuum cylinder 6 from being flipped excessively and causing the item to accidentally fall and injure the staff.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fully automatic helium leak detection device, comprising a support platform (1) and a vacuum cylinder (6) arranged on the support platform (1). A helium mass spectrometer leak detector (7) is fixed to the bottom wall of the vacuum cylinder (6), and a vacuum tube extending to the inner bottom wall of the vacuum cylinder (6) is connected to the detection port of the helium mass spectrometer leak detector (7). Its characteristics are that, It further comprises: a column (2), fixedly arranged on one side of the upper end of the support platform (1), and a horizontal extension part is arranged at the top of the side wall of the column (2); A cylinder (3), fixed on the upper side of the extension part, and its telescopic end slides through the extension cross beam and is fixed with a cylinder cover (4). The cylinder (3) stretches to drive the cylinder cover (4) to fall and cover the opening of the vacuum cylinder (6), and the vacuum cylinder (6) is in a relatively sealed state; A high-pressure pump (5), arranged on the cylinder cover (4), used to provide helium gas. The air outlet of the high-pressure pump (5) is connected with a charging pipe (41) passing through the cylinder cover (4) and extending below the cylinder cover (4). A plurality of support plates (42) are hinged to the end of the charging pipe (41); A torsion spring is arranged at the hinge joint of the charging pipe (41) and the support plate (42). The torque of the torsion spring is used to turn a plurality of support plates (42) along the circumferential direction of the outside of the charging pipe (41) to form an extended frame. A rubber seal (43) is sleeved outside the extended frame. The bottom of the rubber seal (43) can wrap the opening on the outer wall of the end of the charging pipe (41). The rubber seal (43) is larger at the top and smaller at the bottom, and the inner side wall of the rubber seal (43) is fixedly connected with the outer side walls of a plurality of support plates (42); It further comprises a tray (67) that can adjust its position inside the vacuum cylinder (6). A plurality of connecting plates (610) are fixed to the upper edge of the tray (67). A clamping plate (62) is connected to the connecting plate (610), and a plurality of clamping plates (62) form a clamping rack for clamping materials of different volumes.

2. The fully automatic helium leak detection device according to claim 1, wherein: A plurality of hinge rods (44) are hinged to the upper end of the outer wall of the charging pipe (41), and the ends of the hinge rods (44) are hinged to the top of the inner side wall of the support plate (42).

3. The fully automatic helium leak detection device according to claim 2, characterized in that: The upper end of the support plate (42) is bent into a horizontal extension part, and the horizontal extension part serves as a limiting component for the detection port with a larger opening, so that the entire extended frame can completely enter the detection port.

4. The fully automatic helium leak detection device according to claim 1, characterized in that: The upper ends of the clamping plates (62) are inclined upward to the side away from the tray (67).

5. The fully automatic helium leak detection device according to claim 4, characterized in that: A through chute is opened on the side wall of the connecting plate (610). The bottom of the through chute is a rectangular structure, and the top is a circular structure; A connecting notch is opened at the bottom of the clamping plate (62). A rectangular block is fixed between the two side walls inside the connecting notch. The rectangular block is slidably clamped with the rectangular structure of the through chute. The diagonal length of the rectangular slider (69) is equal to the inner diameter of the circular structure.

6. The fully automatic helium leak detection device according to claim 1, wherein: A swing rod (68) is hinged to the edge position of the inner bottom wall of the vacuum cylinder (6), and the swing rod (68) horizontally flips at the rotation position inside the bottom of the vacuum cylinder (6); The swing rod (68) is provided with an adjustment hole penetrating the upper and lower side walls of the swing rod (68). A connecting rod fixedly sliding through the adjustment hole is fixed to the bottom wall of the tray (67), and a limiting disc (611) that slidably fits with the bottom wall of the swing rod (68) is fixed to the bottom wall of the connecting rod.

7. The fully automatic helium leak detection device according to claim 1, wherein: A guiding member is provided inside the vacuum cylinder (6), and the guiding member includes: Two symmetrically distributed inverted L-shaped plates (63); And a guiding ring (64) fixed to the lower side walls of the ends of the two inverted L-shaped plates (63). A clamping interface for the sliding clamping of the two inverted L-shaped plates (63) is provided on the inner wall of the vacuum cylinder (6).

8. The fully automatic helium leak detection device according to claim 1, characterized in that: Two pin shafts (65) are symmetrically fixed to the outer wall of the vacuum cylinder (6). Two support plates (61) are vertically fixed to the upper end of the support table (1). Insertion grooves are provided on the opposite side walls of the two support plates (61), and the ends of the pin shafts (65) are rotatably inserted into the inner walls of the insertion grooves.

9. The fully automatic helium leak detection device according to claim 8, characterized in that: A receiving groove is provided on the inner wall of the insertion groove, and a baffle (66) capable of flipping in the receiving groove is fixed to the bottom wall of the pin shaft (65); The flipping angle of the baffle (66) in the receiving groove is within 0-90°.

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