A sealing plugging structure, airtightness detection device and method based on the structure

Abstract

This invention discloses a sealing and plugging structure, an airtightness testing device and method based on this structure, relating to the field of sealing structures. It includes a support rod, which is movable, and a plugging assembly mounted on the support rod. The plugging assembly includes two support blocks, a rotating shell, a plugging block, a drive cylinder, two clamping strips, and two clamping blocks. The two support blocks are fixedly installed at the ends of the support rod, the rotating shell is rotatably connected to the support blocks, and the drive cylinder is fixedly installed inside the rotating shell. The position of the plugging block can be flexibly adjusted, allowing it to plug holes at different locations on the part to be tested, exhibiting strong adaptability. After the hole in the part to be tested is plugged by adjusting the position of the plugging block, its position can be locked to prevent displacement, maintaining pressure on the hole in the part to be tested, while also withstanding certain other pressures. This results in a good sealing effect and improved testing accuracy.

Description

Technical Field

[0001] This invention relates to the field of sealing structures, and in particular to a sealing and plugging structure, an airtightness testing device and method based on the structure. Background Technology

[0002] Sealing testing of automotive parts is crucial for ensuring the safety, reliability, and lifespan of a vehicle. Good sealing performance prevents moisture, dust, and other impurities from entering the vehicle's interior, reducing component corrosion and wear. It also avoids potential safety hazards caused by leaks, such as fires caused by fuel system leaks or brake failure due to brake system leaks. Pressure testing involves applying a certain pressure (positive or negative) to the component or the entire vehicle and observing whether the pressure remains stable to determine the sealing performance.

[0003] Chinese patent application CN116519229A discloses a sealing device, an airtightness testing device, and an airtightness testing method, including: a sealing cover, comprising a cover body and a partition, the partition dividing the internal space of the cover body into a first chamber and a second chamber, the cover body having a first open end for sealing connection with a valve body; a piston, dividing the second chamber into an independent first sub-chamber and a second sub-chamber; a piston rod, one end of which is connected to the piston; and a magnetic suction element, connected to the other end of the piston rod, for adsorbing the valve cover and opening the valve cover under the action of the piston; wherein, the sealing cover is provided with a first inlet, a second inlet, and a third inlet, with a simple structure, convenient operation, and improved airtightness testing efficiency;

[0004] Chinese patent application CN117168692A discloses an automatic airtightness testing device, including a frame assembly, a limiting mechanism for sealing and fixing plastic pipe fittings, a conveying mechanism for driving the limiting mechanism to move cyclically, and a tank structure for immersing plastic pipe fittings. The limiting mechanism includes two mounting bases for fixing to the conveying mechanism, two sealing members respectively fixedly connected to the corresponding mounting bases, and two limiting rings respectively movably connected to the corresponding mounting bases. The end of the sealing member is provided with a conical head for inserting into the plastic pipe fitting, and one of the sealing members is connected to an inflation mechanism for inflating the plastic pipe fitting. The limiting ring is fixedly connected to an annular seat, which is movably connected to the mounting base through a movable column. A first spring is provided between the movable column and the mounting base to force the limiting ring to rest against the conical head in a normal state and jointly clamp and fix the plastic pipe fitting. It can adapt to the end sealing of plastic pipe fittings of different sizes, so as to improve the efficiency of airtightness testing.

[0005] The aforementioned patents and prior art also have the following defects:

[0006] In airtightness testing, since components often have multiple holes with varying positions and angles, existing sealing structures cannot quickly adjust their position and angle, making them unsuitable for holes at different positions and angles. This results in poor applicability. Furthermore, movable sealing mechanisms have poor load-bearing capacity and are prone to detaching from components under air pressure during airtightness testing, leading to seal failure.

[0007] Therefore, this application provides a sealing and plugging structure, an airtightness testing device and method based on the structure, and a method to meet the requirements. Summary of the Invention

[0008] The purpose of this application is to provide a sealing and plugging structure, an airtightness testing device and method based on the structure, which can flexibly adjust the position of the plugging block so that the plugging block can seal holes at different locations on the part to be tested. It has strong adaptability. After the position of the plugging block is adjusted to seal the hole of the part to be tested, the position of the plugging block can be locked to prevent the plugging block from shifting and keep the plugging block pressed tightly against the hole of the part to be tested. At the same time, it can withstand a certain amount of other pressure, resulting in a good sealing effect of the plugging block and improving the testing accuracy.

[0009] To achieve the above objectives, this application provides the following technical solution: a sealing and plugging structure, including a support rod, the support rod being movable, a plugging assembly being provided on the support rod, the plugging assembly including two support blocks, a rotating shell, a plugging block, a drive cylinder, two clamping strips and two clamping blocks, the two support blocks being fixedly installed at the ends of the support rod, the rotating shell being rotatably connected to the support blocks, the drive cylinder being fixedly installed inside the rotating shell, the plugging block being fixedly installed at the ends of the plugging block, the two clamping strips being fixedly installed on the plugging block, and the two clamping blocks being fixedly installed on corresponding support blocks, the clamping strips having clamping grooves, the clamping blocks being slidably fitted within the clamping grooves, and the clamping blocks being hemispherical in shape.

[0010] An airtightness testing device based on a sealing and plugging structure is provided. The device includes a testing platform, a testing hose, and a pressure sensor. The pressure sensor is disposed within the plugging block. The testing hose is fixed to and connected to the plugging block. Several testing components are disposed on the testing platform. The plugging components are disposed on the testing components. Each testing component includes a connecting shell, a rotating unit, a moving unit, and a rotating unit. A support rod is disposed within the connecting shell. The rotating unit enables the connecting shell to rotate on the testing platform. The rotating unit enables the support rod to rotate within the connecting shell. The moving unit enables the support rod to move within the connecting shell.

[0011] The detection assembly also includes a locking unit, which can lock the rotating unit, the moving unit, and the rotating unit, preventing the support rod from shifting.

[0012] Preferably, the moving unit includes a moving rack, a moving gear, and a moving outer cylinder. The moving rack is fixedly mounted on the support rod, the moving gear meshes with the moving rack, the moving gear is fixedly connected to the moving outer cylinder, the moving outer cylinder is rotatably connected to the connecting shell, and the locking unit can lock the moving outer cylinder.

[0013] Preferably, the rotating unit includes a rotating rod and two rotating plates. The rotating rod is fixedly mounted on the rotating plates away from the locking unit. The movable outer cylinder is sleeved on the rotating rod and rotatably connected to the two rotating plates. The locking unit can lock the rotating rod.

[0014] Preferably, the rotating unit includes a rotating gear ring, a rotating gear, and a rotating motor. The rotating motor is fixedly installed inside the connecting housing, and the rotating gear is fixedly installed at the output end of the rotating motor. The rotating gear meshes with the rotating gear ring.

[0015] The rotating unit also includes an active bevel gear, a passive bevel gear, and a rotating rod. The active bevel gear is fixedly installed at the output end of the rotary motor, the passive bevel gear is fixedly installed on the rotating rod, the passive bevel gear meshes with the active bevel gear, the rotating rod is rotatably connected to the connecting shell, and the locking unit can lock the rotating rod.

[0016] Preferably, the locking unit includes a locking plate, a locking cylinder, a rotary locking gear ring, and a rotary locking gear. The locking cylinder is fixedly mounted on the connecting shell, the locking plate is fixedly mounted on the output end of the locking cylinder, the rotary locking gear is fixedly mounted on the rotating rod, and the rotary locking gear ring is fixedly mounted on the side of the locking plate near the connecting shell and corresponds to the rotary locking gear.

[0017] Preferably, the locking unit further includes a transfer locking gear ring, a rotation locking gear, and a movable locking gear. The rotation locking gear is fixedly mounted on the rotation rod, the movable locking gear is fixedly mounted on the movable outer cylinder, and the transfer locking gear ring is fixedly mounted on the side of the locking plate near the connecting shell and corresponds to the movable locking gear.

[0018] Preferably, movable T-blocks are fixedly installed on the two rotating plates, and movable T-slots are opened on the support rod corresponding to the movable T-blocks, and the movable T-blocks are slidably fitted in the movable T-slots.

[0019] Preferably, a support ring is fixedly installed on the testing platform, the rotating gear ring is fixedly installed on the support ring, a support T-shaped block is fixedly installed on the bottom of the connecting shell, a support T-shaped groove is opened on the support ring, the support T-shaped block is slidably fitted in the support T-shaped groove, a sliding block is fixedly installed on the connecting shell, a sliding groove is opened on the sliding block, and the edge of the testing platform is slidably fitted in the sliding groove.

[0020] An airtightness testing method, using the aforementioned airtightness testing equipment, includes the following steps:

[0021] Place the part to be tested on the testing table;

[0022] The rotating unit drives the connecting shell to rotate on the testing table, rotating the support rod to the position of the corresponding hole in the part to be tested;

[0023] The support rod is rotated within the connecting housing by the rotating unit, adjusting the angle between the support rod and the testing platform. The support rod is moved within the connecting housing by the moving unit, adjusting the length of the support rod above the testing platform, thereby adjusting the position of the sealing block so that the sealing block is located at the hole of the part to be tested.

[0024] The sealing block moves into the hole of the part to be tested and seals the hole.

[0025] The locking unit locks the rotating unit, the moving unit, and the rotary unit, preventing the support rod from moving.

[0026] Operate other detection components to make the corresponding sealing blocks seal other holes in the part to be tested, forming a seal in the inner cavity of the part to be tested;

[0027] Compressed gas is introduced into the inner cavity of the part to be tested through the testing hose until the air pressure in the inner cavity of the part to be tested reaches the specified value as detected by the air pressure sensor.

[0028] After a specified period of time, the air pressure sensor detects the air pressure value inside the part to be tested, and detects whether the part to be tested is leaking by the attenuation of the air pressure value.

[0029] In summary, the technical effects and advantages of this invention are as follows:

[0030] 1. In this invention, the rotating shell can be rotated to adjust the angle of the sealing block, so that the angle of the sealing block is consistent with the hole on the part to be tested. This allows the sealing block to move accurately and seal the hole on the part to be tested, resulting in a good sealing effect. At the same time, when the sealing block moves to seal the hole on the part to be tested, the support block presses the rotating shell tightly, preventing the rotating shell from rotating and detaching from the part to be tested under gas pressure. This ensures good sealing stability of the part to be tested and can withstand greater pressure.

[0031] 2. In this invention, the support rod can be rotated and its position adjusted on the testing platform. The rotation unit allows the support rod to rotate within the connecting shell, adjusting the angle between the support rod and the testing platform. The moving unit allows the support rod to move within the connecting shell, adjusting its length above the testing platform, thereby adjusting the position of the sealing block. Combined with the angle adjustment of the sealing block, the position can be flexibly adjusted, enabling it to seal holes at different locations on the part to be tested. This provides strong adaptability. After sealing the holes in the part to be tested by adjusting the position of the sealing block, its position can be locked to prevent displacement, ensuring the sealing block remains pressed tightly against the holes in the part to be tested. It can also withstand certain other pressures, resulting in a good sealing effect and improved testing accuracy. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the sealing component, support rod, detection component, and support ring in this invention;

[0034] Figure 2 This is a schematic diagram of the structure of the detection stage, the sealing assembly, and the rotating unit in this invention;

[0035] Figure 3 For the present invention Figure 2 Enlarged view of section A;

[0036] Figure 4 This is a schematic diagram of the structure of the sealing block, pressing strip, support rod, connecting shell, rotating unit, moving unit, rotating unit and locking unit in this invention;

[0037] Figure 5 This is a schematic diagram of the support rod and locking unit in this invention;

[0038] Figure 6 For the present invention Figure 5 Enlarged view of section B;

[0039] Figure 7 This is a schematic diagram of the support rod and rotating unit in this invention;

[0040] Figure 8 For the present invention Figure 7 Enlarged view of section C;

[0041] Figure 9This is a schematic diagram of the structure of the rotating gear, rotating plate, moving gear, and moving rack in this invention;

[0042] Figure 10 This is a schematic diagram of the rotating rod, the movable outer cylinder, and the movable gear in this invention;

[0043] Figure 11 This is a schematic diagram of the structure of the support rod, the movable T-block, the rotary motor, the movable gear, and the rotary gear in this invention.

[0044] In the diagram: 1. Support rod; 2. Sealing assembly; 21. Support block; 22. Rotating shell; 23. Sealing block; 24. Drive cylinder; 25. Clamping strip; 26. Clamping block; 3. Testing table; 4. Testing hose; 5. Testing assembly; 51. Connecting shell; 52. Rotating unit; 521. Rotating rod; 522. Rotating plate; 53. Moving unit; 531. Moving rack; 532. Moving gear; 533. Moving outer cylinder; 54. Rotating unit; 541. Rotating cylinder 542. Rotary gear; 543. Rotary motor; 544. Driving bevel gear; 545. Driven bevel gear; 546. Rotating rod; 55. Locking unit; 551. Locking plate; 552. Locking cylinder; 553. Rotary locking gear; 554. Rotary locking gear; 555. Transfer locking gear; 556. Rotating locking gear; 557. Moving locking gear; 6. Moving T-block; 7. Support ring; 8. Support T-block; 9. Sliding block. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example 1: Reference Figures 1-11 The sealing and plugging structure shown includes a support rod 1, which is movable. A plugging assembly 2 is provided on the support rod 1. The plugging assembly 2 includes two support blocks 21, a rotating shell 22, a plugging block 23, a drive cylinder 24, two clamping strips 25, and two clamping blocks 26. The two support blocks 21 are fixedly installed at the ends of the support rod 1. The rotating shell 22 is rotatably connected to the support blocks 21. The drive cylinder 24 is fixedly installed inside the rotating shell 22. The plugging block 23 is fixedly installed at the ends of the plugging block 23. The two clamping strips 25 are fixedly installed on the plugging block 23. The two clamping blocks 26 are fixedly installed on the corresponding support blocks 21. A clamping groove is provided on the clamping strip 25. The clamping block 26 slides in the clamping groove. The clamping block 26 is hemispherical.

[0047] Move the support rod 1 so that the sealing block 23 on the support rod 1 corresponds to the hole of the part to be tested. Adjust the rotating shell 22 to rotate on the support block 21 so that the sealing block 23 corresponds to the hole of the part to be tested at the same angle. Drive the cylinder 24 to move the sealing block 23 so that the sealing block 23 presses against the hole of the part to be tested. At the same time, the sealing block 23 moves the pressing strip 25. The pressing strip 25 pushes and squeezes the pressing block 26. The pressing block 26 causes the support block 21 to deform. The support block 21 presses the rotating shell 22 so that the rotating shell 22 and the sealing block 23 will not rotate.

[0048] The rotating shell 22 can be rotated to adjust the angle of the sealing block 23, so that the angle of the sealing block 23 is consistent with the hole on the part to be tested. This allows the sealing block 23 to move accurately and seal the hole on the part to be tested, resulting in a good sealing effect. At the same time, when the sealing block 23 moves to seal the hole on the part to be tested, the support block 21 presses the rotating shell 22 tightly, preventing the rotating shell 22 from rotating. This prevents the sealing block 23 from rotating and detaching from the part to be tested under gas pressure, resulting in good sealing stability and the ability to withstand greater pressure.

[0049] Example 2, refer to Figures 1-11 Unlike the above embodiments, an airtightness testing device based on a sealing and plugging structure uses the above-mentioned sealing and plugging structure, including a testing platform 3, a testing hose 4 and a pressure sensor. The pressure sensor is set inside the plugging block 23, the testing hose 4 is fixed and connected to the plugging block 23, a plurality of testing components 5 are set on the testing platform 3, the plugging component 2 is set on the testing component 5, the testing component 5 includes a connecting shell 51, a rotating unit 52, a moving unit 53 and a rotating unit 54, the support rod 1 is set inside the connecting shell 51, the rotating unit 54 enables the connecting shell 51 to rotate on the testing platform 3, the rotating unit 52 enables the support rod 1 to rotate inside the connecting shell 51, and the moving unit 53 enables the support rod 1 to move inside the connecting shell 51.

[0050] The detection component 5 also includes a locking unit 55, which can lock the rotating unit 52, the moving unit 53 and the rotating unit 54, so that the support rod 1 cannot be displaced.

[0051] The part to be inspected is placed on the inspection table 3. The rotating unit 54 drives the connecting shell 51 to rotate on the inspection table 3, rotating the support rod 1 to the position corresponding to the hole of the part to be inspected. The rotating unit 52 makes the support rod 1 rotate inside the connecting shell 51, adjusting the angle between the support rod 1 and the inspection table 3. The moving unit 53 moves the support rod 1 inside the connecting shell 51, adjusting the length of the support rod 1 above the inspection table 3, thereby adjusting the position of the sealing block 23, so that the sealing block 23 is located at the hole of the part to be inspected. The sealing block 23 moves into the hole of the part to be inspected, and... The holes in the part to be tested are sealed. The locking unit 55 locks the rotating unit 52, the moving unit 53 and the rotating unit 54, so that the support rod 1 cannot be moved. The other detection components 5 are operated so that the corresponding sealing block 23 seals the other holes in the part to be tested, and the inner cavity of the part to be tested is sealed. The detection hose 4 introduces compressed gas into the inner cavity of the part to be tested until the air pressure in the inner cavity of the part to be tested reaches the specified value by the air pressure sensor. After standing for a specified time, the air pressure sensor detects the air pressure value in the inner cavity of the part to be tested, and detects whether the part to be tested is leaking by the attenuation of the air pressure value.

[0052] The support rod 1 can be rotated and its position adjusted on the testing platform 3. The rotation unit 52 makes the support rod 1 rotate within the connecting shell 51, adjusting the angle between the support rod 1 and the testing platform 3. The moving unit 53 moves the support rod 1 within the connecting shell 51, adjusting the length of the support rod 1 above the testing platform 3, thereby adjusting the position of the sealing block 23. Combined with the angle adjustment of the sealing block 23, the position of the sealing block 23 can be flexibly adjusted, allowing the sealing block 23 to seal holes at different locations on the part to be tested. It has strong adaptability. After the hole of the part to be tested is sealed by adjusting the position of the sealing block 23, the position of the sealing block 23 can be locked to prevent displacement of the sealing block 23, keeping the sealing block 23 pressed tightly against the hole of the part to be tested, while also being able to withstand certain other pressures. This results in a good sealing effect for the sealing block 23 and improves the accuracy of the test.

[0053] The testing table 3 is equipped with a clamping device that can clamp the part to be tested. This is existing technology and is not shown in the figure.

[0054] Example 3, referring to Figures 1-11 Unlike the above embodiments, the moving unit 53 includes a moving rack 531, a moving gear 532, and a moving outer cylinder 533. The moving rack 531 is fixedly mounted on the support rod 1. The moving gear 532 meshes with the moving rack 531. The moving gear 532 is fixedly connected to the moving outer cylinder 533. The moving outer cylinder 533 is rotatably connected to the connecting shell 51. The locking unit 55 can lock the moving outer cylinder 533.

[0055] When the support rod 1 moves within the connecting housing 51 to adjust its length on the testing platform 3, it is pushed to move within the connecting housing 51. The support rod 1 drives the moving rack 531 to move, the moving rack 531 drives the moving gear 532 to rotate, and the moving gear 532 drives the moving outer cylinder 533 to rotate. When the support rod 1 moves to the appropriate position, the locking unit 55 locks the moving outer cylinder 533, preventing the moving gear 532 from rotating and the moving rack 531 from moving, thus preventing the support rod 1 from moving within the connecting housing 51.

[0056] Example 4, refer to Figures 1-11 Unlike the above embodiments, the rotating unit 52 includes a rotating rod 521 and two rotating plates 522. The rotating rod 521 is fixedly installed on the rotating plate 522 away from the locking unit 55. The movable outer cylinder 533 is sleeved on the rotating rod 521 and is rotatably connected to the two rotating plates 522. The locking unit 55 can lock the rotating rod 521.

[0057] When it is necessary to adjust the angle between the support rod 1 and the detection table 3, the support rod 1 is rotated. The support rod 1 drives the rotating plate 522 to rotate, and the rotating plate 522 drives the rotating rod 521 to rotate. When the support rod 1 rotates to the appropriate position, the locking unit 55 locks the rotating rod 521, so that the rotating rod 521, the rotating plate 522 and the support rod 1 cannot rotate.

[0058] Example 5, refer to Figures 1-11 Unlike the above embodiments, the rotating unit 54 includes a rotating gear ring 541, a rotating gear 542 and a rotating motor 543. The rotating motor 543 is fixedly installed in the connecting housing 51, and the rotating gear 542 is fixedly installed at the output end of the rotating motor 543. The rotating gear 542 meshes with the rotating gear ring 541.

[0059] The rotating unit 54 also includes an active bevel gear 544, a passive bevel gear 545, and a rotating rod 546. The active bevel gear 544 is fixedly installed on the output end of the rotating motor 543, the passive bevel gear 545 is fixedly installed on the rotating rod 546, the passive bevel gear 545 meshes with the active bevel gear 544, the rotating rod 546 is rotatably connected to the connecting shell 51, and the locking unit 55 can lock the rotating rod 546.

[0060] When it is necessary to adjust the position of the support rod 1 on the outer ring of the testing platform 3, the rotary motor 543 drives the rotary gear 542 to rotate. As the rotary gear 542 rotates on the rotary gear ring 541, it moves, causing the connecting shell 51 to move along the outer ring of the testing platform 3. The connecting shell 51 drives the support rod 1 and the sealing assembly 2 to move along the outer ring of the testing platform 3. At the same time, the rotary motor 543 drives the active bevel gear 544 to rotate, which in turn drives the passive bevel gear 545 to rotate. The passive bevel gear 545 then drives the rotating rod 546 to rotate. When the support rod 1 and the sealing assembly 2 have moved to the appropriate position, the locking unit 55 locks the rotating rod 546, preventing the passive bevel gear 545, the active bevel gear 544, and the rotary gear 542 from rotating.

[0061] Example 6, refer to Figures 1-11 Unlike the above embodiments, the locking unit 55 includes a locking plate 551, a locking cylinder 552, a rotating locking gear ring 553, and a rotating locking gear 554. The locking cylinder 552 is fixedly installed on the connecting shell 51, the locking plate 551 is fixedly installed on the output end of the locking cylinder 552, the rotating locking gear 554 is fixedly installed on the rotating rod 546, and the rotating locking gear ring 553 is fixedly installed on the side of the locking plate 551 near the connecting shell 51 and corresponds to the rotating locking gear 554.

[0062] When the support rod 1 and the sealing assembly 2 move to the position of the hole with the detection part and seal it, the locking cylinder 552 drives the locking plate 551 to move, the locking plate 551 drives the rotating locking gear ring 553 to move, the rotating locking gear ring 553 is sleeved on the rotating locking gear 554 and meshes with it, so that the rotating locking gear 554 cannot rotate, thereby preventing the rotating rod 546 from rotating.

[0063] Example 7, referring to Figures 1-11 Unlike the above embodiments, the locking unit 55 also includes a transfer locking gear ring 555, a rotation locking gear 556 and a moving locking gear 557. The rotation locking gear 556 is fixedly installed on the rotation rod 521, the moving locking gear 557 is fixedly installed on the moving outer cylinder 533, and the transfer locking gear ring 555 is fixedly installed on the side of the locking plate 551 near the connecting shell 51 and corresponds to the moving locking gear 557.

[0064] At the same time, the locking cylinder 552 also drives the transfer locking gear ring 555 to move, so that the transfer locking gear ring 555 is fitted on the rotating locking gear 556 and the moving locking gear 557, so that the rotating rod 521 and the moving outer cylinder 533 cannot rotate.

[0065] Example 8, referring to Figures 1-11Unlike the above embodiment, a movable T-shaped block 6 is fixedly installed on the two rotating plates 522, and a movable T-shaped groove is opened on the support rod 1 corresponding to the movable T-shaped block 6, and the movable T-shaped block 6 slides in the movable T-shaped groove.

[0066] When the support rod 1 moves within the connecting shell 51, the moving T-block 6 moves within the moving T-slot, making the support rod 1 move more stably, less prone to shaking, and with stronger force-bearing capacity. At the same time, when the rotating plate 522 rotates, it can drive the support rod 1 to rotate through the moving T-block 6.

[0067] Example 9, referring to Figures 1-11 Unlike the above embodiments, a support ring 7 is fixedly installed on the detection stage 3, a rotating gear ring 541 is fixedly installed on the support ring 7, a support T-shaped block 8 is fixedly installed on the bottom of the connecting shell 51, a support T-shaped groove is opened on the support ring 7, the support T-shaped block 8 is slidably fitted in the support T-shaped groove, a sliding block 9 is fixedly installed on the connecting shell 51, a sliding groove is opened on the sliding block 9, and the edge of the detection stage 3 is slidably fitted in the sliding groove.

[0068] When the connecting shell 51 moves along the outer ring of the detection table 3, it drives the supporting T-block 8 to move in the supporting T-groove, making the connecting shell 51 more stable and less prone to shaking.

[0069] An airtightness testing method, using the aforementioned airtightness testing equipment, includes the following steps:

[0070] Place the part to be tested on the testing table 3;

[0071] The rotating unit 54 drives the connecting shell 51 to rotate on the testing table 3, and rotates the support rod 1 to the position of the hole of the part to be tested.

[0072] The support rod 1 is rotated within the connecting shell 51 by rotating unit 52, adjusting the angle between the support rod 1 and the testing table 3. The support rod 1 is moved within the connecting shell 51 by moving unit 53, adjusting the length of the support rod 1 above the testing table 3, thereby adjusting the position of the sealing block 23 so that the sealing block 23 is located at the hole of the part to be tested.

[0073] The sealing block 23 moves into the hole of the part to be tested and seals the hole of the part to be tested;

[0074] Locking unit 55 locks rotating unit 52, moving unit 53 and rotating unit 54, preventing support rod 1 from moving;

[0075] Operate other detection components 5 to make the corresponding sealing block 23 seal other holes in the part to be tested, and form a seal in the inner cavity of the part to be tested;

[0076] The testing hose 4 introduces compressed gas into the inner cavity of the part to be tested until the air pressure in the inner cavity of the part to be tested reaches the specified value as detected by the air pressure sensor.

[0077] After a specified period of time, the air pressure sensor detects the air pressure value inside the part to be tested, and detects whether the part to be tested is leaking by the attenuation of the air pressure value.

[0078] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An airtightness testing device based on a sealing and plugging structure, characterized in that: A sealing and plugging structure is used, which includes a support rod, a plugging block, and a plugging assembly. The airtightness testing equipment includes a testing platform, a testing hose, and a pressure sensor. The pressure sensor is installed inside the plugging block. The testing hose is fixed and connected to the plugging block. Several testing assemblies are installed on the testing platform. The plugging assembly is installed on the testing assembly. The testing assembly includes a connecting shell, a rotating unit, a moving unit, and a rotating unit. The support rod is installed inside the connecting shell. The rotating unit enables the connecting shell to rotate on the testing platform. The rotating unit enables the support rod to rotate inside the connecting shell. The moving unit enables the support rod to move inside the connecting shell. The detection component also includes a locking unit, which can lock the rotating unit, the moving unit and the rotating unit to prevent the support rod from moving. The rotating unit includes a rotating gear ring, a rotating gear, and a rotating motor. The rotating motor is fixedly installed inside the connecting housing, and the rotating gear is fixedly installed at the output end of the rotating motor. The rotating gear meshes with the rotating gear ring. The rotating unit also includes a driving bevel gear, a driven bevel gear, and a rotating rod. The driving bevel gear is fixedly installed at the output end of the rotating motor, the driven bevel gear is fixedly installed on the rotating rod, and the driven bevel gear meshes with the driving bevel gear. The rotating rod is rotatably connected to the connecting shell, and the locking unit can lock the rotating rod. The locking unit includes a locking plate, a locking cylinder, a rotary locking gear ring, and a rotary locking gear. The locking cylinder is fixedly mounted on the connecting shell, the locking plate is fixedly mounted on the output end of the locking cylinder, the rotary locking gear is fixedly mounted on the rotating rod, and the rotary locking gear ring is fixedly mounted on the side of the locking plate near the connecting shell and corresponds to the rotary locking gear.

2. The airtightness testing device based on a sealing and plugging structure according to claim 1, characterized in that: The moving unit includes a moving rack, a moving gear, and a moving outer cylinder. The moving rack is fixedly mounted on the support rod, the moving gear meshes with the moving rack, the moving gear is fixedly connected to the moving outer cylinder, the moving outer cylinder is rotatably connected to the connecting shell, and the locking unit can lock the moving outer cylinder.

3. The airtightness testing device based on a sealing and plugging structure according to claim 2, characterized in that: The rotating unit includes a rotating rod and two rotating plates. The rotating rod is fixedly installed on the rotating plates away from the locking unit. The movable outer cylinder is sleeved on the rotating rod and rotatably connected to the two rotating plates. The locking unit can lock the rotating rod.

4. The airtightness testing device based on a sealing and plugging structure according to claim 3, characterized in that: The locking unit further includes a transfer locking gear ring, a rotation locking gear, and a movable locking gear. The rotation locking gear is fixedly mounted on the rotation rod, the movable locking gear is fixedly mounted on the movable outer cylinder, and the transfer locking gear ring is fixedly mounted on the side of the locking plate near the connecting shell and corresponds to the movable locking gear.

5. The airtightness testing device based on a sealing and plugging structure according to claim 3, characterized in that: Movable T-blocks are fixedly installed on the two rotating plates, and a movable T-slot is opened on the support rod corresponding to the movable T-block. The movable T-block is slidably fitted in the movable T-slot.

6. The airtightness testing device based on a sealing and plugging structure according to claim 4, characterized in that: A support ring is fixedly installed on the testing platform, the rotating gear ring is fixedly installed on the support ring, a support T-shaped block is fixedly installed on the bottom of the connecting shell, a support T-shaped groove is opened on the support ring, the support T-shaped block is slidably fitted in the support T-shaped groove, a sliding block is fixedly installed on the connecting shell, a sliding groove is opened on the sliding block, and the edge of the testing platform is slidably fitted in the sliding groove.

7. The airtightness testing device based on a sealing and plugging structure according to claim 1, characterized in that: The support rod is movable. The sealing assembly includes two support blocks, a rotating shell, a drive cylinder, two clamping strips, and two clamping blocks. The two support blocks are fixedly installed at the ends of the support rod. The rotating shell is rotatably connected to the support blocks. The drive cylinder is fixedly installed inside the rotating shell. The sealing block is fixedly installed at the end of the drive cylinder. The two clamping strips are fixedly installed on the sealing blocks. The two clamping blocks are fixedly installed on the corresponding support blocks. The clamping strips have clamping grooves, and the clamping blocks slide within the clamping grooves. The clamping blocks are hemispherical in shape.

8. An airtightness testing method, using the airtightness testing device as described in any one of claims 1-7, characterized in that: Includes the following steps: Place the part to be tested on the testing table; The rotating unit drives the connecting shell to rotate on the testing table, rotating the support rod to the position of the corresponding hole in the part to be tested; The support rod is rotated within the connecting housing by the rotating unit, adjusting the angle between the support rod and the testing platform. The support rod is moved within the connecting housing by the moving unit, adjusting the length of the support rod above the testing platform, thereby adjusting the position of the sealing block so that the sealing block is located at the hole of the part to be tested. The sealing block moves into the hole of the part to be tested and seals the hole. The locking unit locks the rotating unit, the moving unit, and the rotary unit, preventing the support rod from moving. Operate other detection components to make the corresponding sealing blocks seal other holes in the part to be tested, forming a seal in the inner cavity of the part to be tested; Compressed gas is introduced into the inner cavity of the part to be tested through the testing hose until the air pressure in the inner cavity of the part to be tested reaches the specified value as detected by the air pressure sensor. After a specified period of time, the air pressure sensor detects the air pressure value inside the part to be tested, and detects whether the part to be tested is leaking by the attenuation of the air pressure value.

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