A seal air tightness detection device

Abstract

The application relates to a sealing piece airtightness detection equipment, which comprises a bearing cabinet and a detection cabinet fixed above the bearing cabinet, the detection cabinet can generate high-pressure gas, a telescopic air cylinder is fixed at the bottom of the detection cabinet, a contact adjusting assembly is arranged at the bottom of the telescopic air cylinder, the contact adjusting assembly is rotationally connected with a lifting plate which can displace along the up-down direction, an upper test tool connected with the contact adjusting assembly is arranged below the lifting plate, a telescopic communication pipe II is fixed to the upper test tool, the telescopic communication pipe II is unidirectionally communicated with the upper test tool through a spring one-way valve, the telescopic communication pipe II is communicated with the detection cabinet through the lifting plate, the contact adjusting assembly is communicated with the lifting plate, and a lower test tool is arranged at the top of the bearing cabinet and located below the upper test tool; the application has the advantages that different thickness sealing pieces can be conveniently detected.

Description

Technical Field

[0001] This invention belongs to the technical field of airtightness testing equipment, and specifically relates to an airtightness testing device for sealing components. Background Technology

[0002] Seals are materials or parts that prevent fluids or solid particles from leaking between adjacent mating surfaces and prevent external impurities such as dust and moisture from entering the interior of machinery and equipment. After the seals are manufactured, their airtightness needs to be tested by airtightness testing equipment to prevent defective products from entering the market.

[0003] In existing technologies, airtightness testing equipment determines the extension length of the telescopic device based on the thickness of the seal during testing to ensure contact between the testing fixture and the seal. For seals with minimal thickness variation, a pneumatic servo clamping system is used. This system adjusts the position of the testing fixture using servo cylinders and displacement sensors to accommodate seals of different thicknesses. While the pneumatic servo clamping system can assist in adjusting the displacement of the testing fixture, it cannot autonomously adjust based on changes in the detected gas pressure. This can lead to gas leakage when the detected gas pressure increases, affecting the accuracy of the test. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a sealing airtightness testing device that facilitates the testing of sealing components of different thicknesses.

[0005] The technical solution of the present invention is as follows:

[0006] A sealing component airtightness testing device includes a carrier cabinet and a testing cabinet fixed above the carrier cabinet. The testing cabinet is capable of generating high-pressure gas. A telescopic cylinder is fixed at the bottom of the testing cabinet. A contact adjustment component is provided at the bottom of the telescopic cylinder. The contact adjustment component is rotatably connected to a lifting plate that moves vertically. An upper test fixture connected to the contact adjustment component is provided below the lifting plate. A telescopic connecting pipe II is fixed to the upper test fixture. The telescopic connecting pipe II is unidirectionally connected to the upper test fixture through a spring one-way valve. The telescopic connecting pipe II is connected to the testing cabinet through the lifting plate. The contact adjustment component is connected to the lifting plate.

[0007] The top of the support cabinet is equipped with a lower test fixture located below the upper test fixture.

[0008] Furthermore, the contact adjustment assembly includes a connecting column fixed on the telescopic cylinder, a rotating barrel rotatably connected to the lifting plate, and a threaded column threadedly connected inside the rotating barrel. The threaded column is fixed on the upper test fixture. A rotating cavity is opened inside the connecting column. The rotating barrel is rotatably and sealed inside the rotating cavity to form an annular rotating cavity. Several fan plates fixed to the rotating barrel are contacted and sealed inside the rotating cavity.

[0009] The connecting column has an air inlet and an exhaust outlet on its side. The air inlet is connected to the lifting plate. Air enters through the air inlet and exits through the exhaust outlet to drive the fan plate to rotate.

[0010] Furthermore, the fan plate is provided with a contact sealing gasket that contacts and seals with the rotating cavity.

[0011] Furthermore, a chamber is provided above the connecting column, and a circular groove is provided on the connecting column for the insertion of the telescopic cylinder. At least one insertion component and multiple limiting components are provided in the chamber. The telescopic cylinder is provided with an insertion hole and a limiting hole for the insertion component and the limiting components to be inserted. One end of the insertion component is sealed through the connecting column and extends to the outside of the connecting column. After the insertion component is rotated, it can discharge the gas in the chamber.

[0012] The chamber is unidirectionally connected to the rotating chamber, and the gas from the air inlet can enter the chamber from the rotating chamber. The limiting component gradually inserts into the limiting hole as the air pressure in the chamber increases.

[0013] Furthermore, the plug-in assembly includes an exhaust seat and a plug-in post elastically connected within the chamber. The exhaust seat is fixed to the circular side of the chamber near the connecting post. The plug-in post passes through the exhaust seat and is inserted into the plug-in hole. The exhaust seat has at least one circular hole, and the plug-in post has an exhaust channel. The plug-in post has a through hole communicating with the exhaust channel. The through hole can be rotated to align with the circular hole. One end of the plug-in post passes through the connecting post and extends to the outside of the connecting post. The exhaust channel communicates with the side of the plug-in post extending out of the connecting post.

[0014] Furthermore, a handwheel is provided at one end of the plug-in post that extends out of the connecting post.

[0015] Furthermore, the limiting assembly includes a guide cylinder, a displacement piston sealed and inserted into the guide cylinder, and a limiting post fixed on the displacement piston. The guide cylinder is fixed on the circular side of the chamber near the connecting post, the limiting post can be inserted into the limiting hole, and the displacement piston is elastically connected to the guide cylinder.

[0016] Furthermore, the lifting plate has a connecting channel, which is connected to the contact adjustment assembly and the telescopic connecting pipe II via a rotating cavity and a spring one-way valve. The lifting plate is fixedly connected to the telescopic connecting pipe I, which is connected to the testing cabinet. The lifting plate is connected to a linear guide rod via a linear bearing, and the linear guide rod is fixed to the testing cabinet and the carrying cabinet.

[0017] Furthermore, a base is provided on the top of the carrier cabinet, and the lower test fixture is fixed on the base.

[0018] Furthermore, the testing cabinet is equipped with a display screen.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention uses a contact adjustment component to extend the upper test fixture when the detection air pressure increases, so as to ensure the contact between the upper test fixture and the seal, and to ensure the accuracy of the detection. The upper test fixture is restricted from rotating by the telescopic connecting pipe II, so as to ensure the normal downward movement of the upper test fixture and to ensure the detection.

[0021] 2. The present invention enables the temporary installation of the contact adjustment component and the telescopic cylinder and the discharge of gas in the chamber through the plug-in component, so as to facilitate the installation and fixation of the contact adjustment component, and achieves secondary fixation through the limiting component to ensure the stability of the fixation.

[0022] In summary, the present invention has the advantage of facilitating the testing of seals of different thicknesses. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 A magnified structural diagram of part A;

[0025] Figure 3 For the present invention Figure 2 A schematic diagram of the contact adjustment component;

[0026] Figure 4 For the present invention Figure 3 A schematic diagram of the AA cross-sectional structure;

[0027] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure of part B;

[0028] Figure 6 For the present invention Figure 1 A schematic diagram of the lifting platform.

[0029] In the diagram, 1. Carrying cabinet; 2. Lower test fixture; 3. Contact adjustment assembly; 31. Exhaust port; 32. Limiting assembly; 321. Displacement piston; 322. Limiting post; 323. Guide cylinder; 33. Contact sealing gasket; 34. Fan plate; 35. Handwheel; 36. Round hole; 37. Insertion hole; 38. Insertion post; 39. Exhaust seat; 30. Exhaust channel; 301. Chamber; 302. Connecting post; 303. Rotating barrel; 304. Threaded post; 305. Limiting hole; 4. Telescopic connecting pipe I; 5. Telescopic cylinder; 6. Test cabinet; 7. Display screen; 8. Linear guide rod; 9. Base; 10. Upper test fixture; 11. Lifting plate; 111. Connecting channel; 112. Spring check valve; 12. Telescopic connecting pipe II. Detailed Implementation

[0030] 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.

[0031] like Figures 1 to 6 As shown, a sealing component airtightness testing device includes a carrier cabinet 1 and a testing cabinet 6 fixed above the carrier cabinet 1. The testing cabinet 6 can generate high-pressure gas. A telescopic cylinder 5 is fixed at the bottom of the testing cabinet 6. A contact adjustment component 3 is provided at the bottom of the telescopic cylinder 5. The contact adjustment component 3 is rotatably connected to a lifting plate 11 that moves in the vertical direction. An upper test fixture 10 connected to the contact adjustment component 3 is provided below the lifting plate 11. A telescopic connecting pipe II 12 is fixed to the upper test fixture 10. The telescopic connecting pipe II 12 is connected to the upper test fixture 10 in one direction through a spring one-way valve 112. The telescopic connecting pipe II 12 is connected to the testing cabinet 6 through the lifting plate 11. The contact adjustment component 3 is connected to the lifting plate 11.

[0032] The top of the carrier cabinet 1 is provided with a lower test fixture 2 located below the upper test fixture 10;

[0033] It should be noted that the testing cabinet 6 is equipped with a corresponding air pump, air storage device, and air pressure detection sensor to generate high-pressure gas and deliver it to the corresponding equipment or components.

[0034] During use, the operator places the seal inside the lower test fixture 2. Then, the telescopic cylinder 5 operates, driving the lower lifting plate 11 and the test fixture to move downwards until the telescopic cylinder 5 extends to the set length and stops. After that, the test cabinet 6 outputs high-pressure gas to the lifting plate 11. At this time, under the action of the spring check valve 112, the gas first enters the contact adjustment component 3, causing the contact adjustment component 3 to adjust the position of the upper test fixture 10 and cause the upper test fixture 10 to press down and contact the seal to form a sealing contact. Then, as the air pressure increases, the spring check valve 112 opens and enters the upper test fixture 10 through the telescopic connecting pipe II 12 to test the air tightness of the seal. Similarly, as the air pressure increases, the contact adjustment component 3 also gradually moves down to squeeze the seal to ensure the sealing effect. When the test is completed, the test cabinet 6 extracts the gas from the lifting plate 11 so that the contact adjustment component 3 and the upper test fixture 10 can be reset.

[0035] It should be noted that the upper test fixture 10 and the lower test fixture 2 are sealed with the sealing element by using an elastic sealing ring or other elastic sealing element.

[0036] In this embodiment, the contact adjustment assembly 3 includes a connecting column 302 fixed on the telescopic cylinder 5, a rotating barrel 303 rotatably connected to the lifting plate 11, and a threaded column 304 threadedly connected inside the rotating barrel 303. The threaded column 304 is fixed on the upper test fixture 10. A rotating cavity is opened inside the connecting column 302. The rotating barrel 303 is rotatably and sealed inside the rotating cavity to form an annular rotating cavity. Several fan plates 34 fixed to the rotating barrel 303 are contacted and sealed inside the rotating cavity.

[0037] The connecting column 302 has an air inlet and an exhaust outlet 31 on its side. The air inlet is connected to the lifting plate 11. Air enters from the air inlet and exits from the exhaust outlet 31 to drive the fan plate 34 to rotate.

[0038] When testing is required, the air pressure inside the lifting plate 11 increases, and air enters the rotating chamber through the air inlet and drives the fan plate 34 to rotate. The fan plate 34 drives the rotating barrel 303 to rotate. Under the action of the telescopic connecting pipe II12, the upper test fixture 10 cannot rotate, so the threaded column 304 moves down to ensure the auxiliary displacement of the upper test fixture 10 and ensure contact with the seal.

[0039] When a reset is required, simply remove the air.

[0040] The structure of the fan plate 34 being driven to rotate in both directions by gas is existing technology and will not be described in detail here.

[0041] In this embodiment, the fan plate 34 is provided with a contact sealing gasket 33 that contacts and seals with the rotating cavity.

[0042] During use, the contact sealing gasket 33 ensures the sealing between the fan plate 34 and the rotating cavity, thus ensuring the rotation of the fan plate 34.

[0043] In this embodiment, a chamber 301 is also provided above the connecting post 302. The connecting post 302 has a circular groove for the telescopic cylinder 5 to be inserted. At least one insertion component and multiple limiting components 32 are provided in the chamber 301. The telescopic cylinder 5 has an insertion hole 37 and a limiting hole 305 for the insertion component and the limiting components 32 to be inserted. One end of the insertion component passes through the connecting post 302 and extends to the outside of the connecting post 302. After the insertion component rotates, it can discharge the gas in the chamber 301.

[0044] The chamber 301 is unidirectionally connected to the rotating chamber, and the gas from the air inlet can enter the chamber 301 from the rotating chamber. The limiting component 32 gradually inserts into the limiting hole 305 as the air pressure in the chamber 301 increases.

[0045] When the telescopic cylinder 5 is damaged and needs repair, the personnel use the plug-in assembly to release the gas in the chamber 301, so that the limiting assembly 32 is no longer inserted into the limiting hole 305, and then pull the plug-in assembly to disengage from the plug-in hole 37, so that the connecting post 302 is disengaged from the telescopic cylinder 5, and then the telescopic cylinder 5 can be removed from the testing cabinet 6.

[0046] After the maintenance is completed, the telescopic cylinder 5 is re-fixed on the testing cabinet 6. Then, the circular groove of the connecting column 302 is inserted into the telescopic cylinder 5, and the insertion component is inserted into the insertion hole 37. Then, as the air pressure of the lifting plate 11 increases, the air self-rotates into the chamber 301. The air pressure in the chamber 301 increases, and the limiting component 32 is gradually inserted into the limiting hole 305. At this time, the fixing is completed. With each increase in air pressure, the insertion depth of the limiting component 32 gradually increases to ensure the stability of the fixing.

[0047] In this embodiment, the plug-in assembly includes an exhaust seat 39 and a plug-in post 38 elastically connected to the chamber 301 by a spring. The exhaust seat 39 is fixed on the circular side of the chamber 301 near the connecting post 302. The plug-in post 38 passes through the exhaust seat 39 and is inserted into the plug-in hole 37. The exhaust seat 39 has at least one circular hole 36. The plug-in post 38 has an exhaust channel 30 and a through hole communicating with the exhaust channel 30. The through hole can be rotated to align with the circular hole 36. One end of the plug-in post 38 passes through the connecting post 302 and extends to the outside of the connecting post 302. The exhaust channel 30 communicates with the side of the plug-in post 38 extending out of the connecting post 302.

[0048] When in use, the plug 38 is inserted into the plug hole 37, and the round hole 36 is not aligned with the through hole. When it needs to be removed, the operator rotates the plug 38 so that the round hole 36 is aligned with the through hole. At this time, the gas in the chamber 301 is discharged, the limiting component 32 is disengaged from the limiting hole 305, and then the plug 38 is pulled to disengage the plug 38 from the plug hole 37.

[0049] When installation is required, simply rotate the plug pin 38 to reset it so that the through hole does not correspond to the round hole 36, and when the telescopic cylinder 5 is inserted into the round groove, the plug pin 38 can be elastically inserted into the plug hole 37.

[0050] In this embodiment, a handwheel 35 is fixed to one end of the plug-in post 38 that extends out of the connecting post 302;

[0051] During use, the handwheel 35 facilitates the rotation and pulling of the plug 38, ensuring its proper function.

[0052] In this embodiment, the limiting component 32 includes a guide cylinder 323, a displacement piston 321 sealed and inserted into the guide cylinder 323, and a limiting post 322 fixed on the displacement piston 321. The guide cylinder 323 is fixed on the circular side of the chamber 301 near the connecting post 302. The limiting post 322 can be inserted into the limiting hole 305. The displacement piston 321 is elastically connected to the guide cylinder 323 by a spring.

[0053] When in use, the insertion post 38 is inserted into the insertion hole 37. At this time, the limiting post 322 is aligned with the limiting hole 305. Then, as the air pressure in the chamber 301 increases, the displacement piston 321 moves along the guide cylinder 323 and drives the limiting post 322 to gradually insert into the limiting hole 305. When the air pressure in the chamber 301 decreases, the displacement piston 321 elastically resets and drives the limiting post 322 to disengage from the limiting hole 305.

[0054] In this embodiment, the lifting plate 11 has a connecting channel 111, which is connected to the contact adjustment assembly 3 and the telescopic connecting pipe II 12 through the rotating cavity and the spring one-way valve 112 respectively. The lifting plate 11 is fixedly connected to the telescopic connecting pipe I4, which is connected to the detection cabinet 6. The lifting plate 11 is connected to the linear guide rod 8 through the linear bearing, and the linear guide rod 8 is fixed on the detection cabinet 6 and the carrying cabinet 1.

[0055] During use, gas is delivered through the connecting channel 111 to ensure its operation, and the lifting plate 11 is guided by the linear guide rod 8 to prevent the upper test fixture 10 from tilting and to ensure the test is performed.

[0056] In this embodiment, a base 9 is fixed to the top of the carrier cabinet 1, and the lower test fixture 2 is fixed on the base 9.

[0057] In this embodiment, the testing cabinet 6 is fixed with a display screen 7.

[0058] 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. A sealing component airtightness testing device, comprising a carrier cabinet and a testing cabinet fixed above the carrier cabinet, wherein the testing cabinet is capable of generating high-pressure gas, characterized in that: The bottom of the testing cabinet is fixed with a telescopic cylinder, and the bottom of the telescopic cylinder is provided with a contact adjustment component. The contact adjustment component is rotatably connected to a lifting plate that moves in the vertical direction. Below the lifting plate is an upper testing fixture connected to the contact adjustment component. The upper testing fixture is fixed with a telescopic connecting pipe II. The telescopic connecting pipe II is connected to the upper testing fixture in one direction through a spring one-way valve. The telescopic connecting pipe II is connected to the testing cabinet through the lifting plate. The contact adjustment component is connected to the lifting plate. The top of the carrier cabinet is provided with a lower test fixture located below the upper test fixture; The contact adjustment assembly includes a connecting column fixed on a telescopic cylinder, a rotating barrel rotatably connected to a lifting plate, and a threaded column threadedly connected inside the rotating barrel. The threaded column is fixed on an upper test fixture. A rotating cavity is opened inside the connecting column. The rotating barrel is rotatably and sealed inside the rotating cavity to form an annular rotating cavity. Several fan plates fixed to the rotating barrel are contacted and sealed inside the rotating cavity. The connecting column has an air inlet and an exhaust outlet on its side. The air inlet is connected to the lifting plate. Air enters through the air inlet and exits through the exhaust outlet to drive the fan plate to rotate. A chamber is also provided above the connecting column. The connecting column has a circular groove for the insertion of the telescopic cylinder. At least one insertion component and multiple limiting components are provided in the chamber. The telescopic cylinder has an insertion hole and a limiting hole for the insertion component and the limiting components to be inserted. One end of the insertion component passes through the connecting column and extends to the outside of the connecting column. After the insertion component rotates, it can discharge the gas in the chamber. The chamber is unidirectionally connected to the rotating chamber, and the gas in the air inlet can enter the chamber from the rotating chamber. The limiting component gradually inserts into the limiting hole as the air pressure in the chamber increases. The plug-in assembly includes an exhaust seat and a plug-in post elastically connected to the chamber. The exhaust seat is fixed on the circular side of the chamber near the connecting post. The plug-in post passes through the exhaust seat and is inserted into the plug-in hole. The exhaust seat has at least one circular hole. The plug-in post has an exhaust channel and a through hole communicating with the exhaust channel. The through hole can be rotated to align with the circular hole. One end of the plug-in post passes through the connecting post and extends to the outside of the connecting post. The exhaust channel communicates with the side of the plug-in post extending out of the connecting post.

2. The airtightness testing device for a sealing component according to claim 1, characterized in that: The fan plate is provided with a contact sealing gasket that contacts and seals with the rotating cavity.

3. The airtightness testing device for a sealing component according to claim 2, characterized in that: A handwheel is provided at one end of the plug-in post that extends out of the connecting post.

4. The airtightness testing device for a sealing component according to claim 3, characterized in that: The limiting assembly includes a guide cylinder, a displacement piston sealed and inserted into the guide cylinder, and a limiting post fixed on the displacement piston. The guide cylinder is fixed on the circular side of the chamber near the connecting post. The limiting post can be inserted into the limiting hole. The displacement piston is elastically connected to the guide cylinder.

5. The airtightness testing device for a sealing component according to claim 4, characterized in that: The lifting plate has a connecting channel, which is connected to the contact adjustment assembly and the telescopic connecting pipe II via a rotating cavity and a spring one-way valve. The lifting plate is fixedly connected to the telescopic connecting pipe I, which is connected to the testing cabinet. The lifting plate is connected to a linear guide rod via a linear bearing, and the linear guide rod is fixed on the testing cabinet and the carrying cabinet.

6. The airtightness testing device for a sealing component according to claim 5, characterized in that: The top of the support cabinet is provided with a base, and the lower test fixture is fixed on the base.

7. The airtightness testing device for a sealing component according to claim 1, characterized in that: The testing cabinet is equipped with a display screen.

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