Airtightness detection equipment

Abstract

The invention relates to air tightness detection equipment, which is used for detecting the air tightness of a hollow tubular product to be detected, and comprises a material supply mechanism used for supplying materials and transferring the product to be detected to a rotating table; the rotary table is provided with a plurality of stations which are uniformly distributed along the circumference, each station is provided with a carrier main plate, each carrier main plate is provided with at least two product positioning groups, each product positioning group comprises an elastic sealing element, and each elastic sealing element is used for being in contact with one end of a to-be-tested product to form sealing; the air tightness detection mechanism is arranged above the rotating table and comprises air tightness measuring heads corresponding to the product positioning groups on the carrier mainboard in number, and the air tightness measuring heads are used for being connected with the other ends of the to-be-detected products; and a gas circuit communicated with the interior of the to-be-tested product is arranged in the airtightness measuring head, and the gas circuit is used for being communicated with an airtightness detection system so as to perform a negative pressure airtightness test on the to-be-tested product. The airtightness detection equipment has the advantages of simple structure, reliable sealing and high detection efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of product airtightness detection, and in particular to an airtightness detection device. Background Art

[0002] Among automation equipment, airtightness testing equipment is one of the common equipment. Its performance and efficiency are directly related to the operating efficiency of the entire production line and the stability of product quality.

[0003] Traditional airtightness testing equipment mostly relies on positive pressure testing, which is to evaluate the airtightness performance by filling the interior of the product to be tested with compressed air and using airtightness testing instruments to monitor the changes in the internal air pressure of the product. However, this traditional positive pressure testing method has problems such as complex equipment, low testing efficiency, and complex operation. Summary of the invention

[0004] In order to solve the problems of complex structure, low detection efficiency, complicated operation and the like in the airtight detection equipment in the prior art.

[0005] The present application provides an airtightness detection device for detecting the airtightness of a hollow tubular product to be tested, comprising:

[0006] A feeding mechanism, used for feeding and transferring the product to be tested to the rotating table;

[0007] A rotating table, on which a plurality of workstations evenly distributed along the circumference are provided, each of the workstations is provided with a carrier mainboard, the carrier mainboard is provided with at least two product positioning groups, the product positioning groups include elastic sealing members, and the elastic sealing members are used to contact with one end of the product to be tested to form a seal;

[0008] An airtight detection mechanism is arranged above the rotating table, and includes airtight probes corresponding to the number of the product positioning groups on the carrier mainboard, and the airtight probes are used to be connected to the other end of the product to be tested; an air path connected to the interior of the product to be tested is provided in the airtight probe, and the air path is used to be connected to the airtight detection system to perform a negative pressure airtight test on the product to be tested.

[0009] Furthermore, at least two positioning holes are provided on the carrier mainboard; the elastic sealing member includes a sealing sphere and an elastic supporting member, the sealing sphere is supported by the elastic supporting member and is pre-buried in the positioning hole.

[0010] Further, the product positioning group includes product pressing blocks symmetrically arranged on both sides of the positioning hole, and a rotating connecting rod connected to the product pressing blocks and located below the carrier mainboard;

[0011] The product pressing block is used to rotate, open and press down above the carrier mainboard under the drive of the rotating connecting rod to fix the product to be tested.

[0012] Furthermore, a pressing block opening mechanism is provided below the rotating table, and the pressing block opening mechanism includes a pushing block group corresponding to the number of the product positioning groups on the carrier mainboard;

[0013] Each of the push block groups includes two push blocks, and the push block group can move up and down, so that the rotating connecting rod rotates under the push of the push blocks.

[0014] Furthermore, the airtight detection mechanism includes a probe driving mechanism, and the probe driving mechanism is arranged above the airtight probe and is used to drive the airtight probe to be pressed down to contact the product to be tested.

[0015] Furthermore, the airtight probe comprises a pressure block section, a probe section, and a first elastic member connected to each other; the first elastic member is sleeved on the outside of the pressure block section to allow the pressure block section and the probe section to float in their axial direction.

[0016] Furthermore, the probe section includes an outer tube, and the outer tube is used to be sleeved on the outside of the product to be tested.

[0017] Furthermore, a sealing member is provided on the lower end surface of the outer tube, and the sealing member contacts and seals with the outer wall of the product to be tested.

[0018] Furthermore, the probe section comprises an inner layer moving part, the outer wall of the inner layer moving part is air-tightly connected to the inner wall of the product to be tested, and the air path is arranged inside the inner layer moving part.

[0019] Furthermore, the inner layer moving member is slidably connected to the outer layer tube.

[0020] Implementing the embodiments of the present application has the following beneficial effects:

[0021] The airtightness detection equipment of the present application can simultaneously perform airtightness detection on multiple products to be tested through the design of a multi-station rotating table, a carrier mainboard with multiple product positioning groups, and an airtightness probe corresponding to the number of product positioning groups on the carrier mainboard, thereby improving the detection efficiency. The product positioning group forms a seal with one end of the product to be tested through an elastic seal embedded in the carrier mainboard, which has a simple structure and reliable and stable sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of the airtightness detection device of an embodiment of the present application;

[0024] Figure 2 It is a schematic diagram of the structure in which the product to be tested is fixed on the carrier mainboard in an embodiment of the present application;

[0025] Figure 3 is a cross-sectional view of the product to be tested, the carrier mainboard and the elastic sealing member of the embodiment of the present application;

[0026] Figure 4 is a cross-sectional view of a product to be tested and a product positioning group according to an embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the structure of the rotating platform of the embodiment of the present application;

[0028] Figure 6 It is a structural schematic diagram of the pressing block opening mechanism of an embodiment of the present application;

[0029] Figure 7 It is a structural schematic diagram of the airtight detection mechanism of an embodiment of the present application;

[0030] Figure 8 is a cross-sectional view of the airtight probe of an embodiment of the present application;

[0031] Fig. 9 yes Figure 8 A partial structural enlargement of the

[0032] Fig.10 It is a structural schematic diagram of a feeding device according to an embodiment of the present application;

[0033] Fig.11 It is a structural schematic diagram of the discharging mechanism of the embodiment of the present application.

[0034] The reference numerals in the figure correspond to: feeding mechanism 1, feeding hopper 11, vibrating plate 12, feeding device 13, material taking clamp 14, rotating table 2, cam divider 20, carrier main board 21, positioning hole 211, elastic sealing member 22, sealing ball 221, elastic support member 222, product positioning group 23, product pressing block 231, rotating connecting rod 232, pressing block opening mechanism 24, pushing block 241, guiding inclined surface 2411, pushing Block driving part 242, airtight detection mechanism 3, airtight probe 31, pressure block section 311, probe section 312, outer layer tube 3121, sealing part 3122, inner layer moving part 3123, first elastic part 313, inner layer connecting section 314, second elastic part 315, air path 32, probe driving mechanism 33, first fixed plate 34, second fixed plate 35, product to be tested 4, discharging mechanism 5, NG discharge frame 6, finished product receiving frame 7. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] In the description of the present application, it should be understood that the terms "upper, lower, inside, outside, top, bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are for the components themselves in the vertical, perpendicular or gravity direction, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0037] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the technical field of the present application. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present application. Terms such as "parts" and "components" appearing in this article may represent either a single part or a combination of multiple parts. Terms such as "installation", "setting", "connection" and the like appearing in this article should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may represent that one component is directly attached to another component, or that one component is attached to another component through an intermediate, or it may be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. The features described in one embodiment herein may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0038] The following combination Figure 1-Figure 11 An airtightness detection device provided in an embodiment of the present application is introduced, which is used for airtightness detection of a hollow tubular product to be tested 4. The product to be tested in this embodiment can be an intake or exhaust valve, and the valve includes a stem and a top with a raised edge.

[0039] Airtightness testing equipment includes:

[0040] A feeding mechanism 1 is used for feeding and transferring the product 4 to be tested to the rotating table 2;

[0041] The rotating table 2 is provided with a plurality of workstations evenly distributed along the circumference, each workstation is provided with a carrier mainboard 21, and the carrier mainboard 21 is provided with at least two product positioning groups 23, and the product positioning group 23 includes an elastic sealing member 22, and the elastic sealing member 22 is used to contact with one end of the product 4 to be tested to form a seal;

[0042] The airtight detection mechanism 3 is arranged above the rotating table 2, and includes airtight probes 31 corresponding to the number of product positioning groups 23 on the carrier mainboard 21. The airtight probes 31 are used to connect with the other end of the product to be tested 4; an air path 32 connected to the inside of the product to be tested 4 is provided in the airtight probe 31, and the air path 32 is used to connect with the airtight detection system to perform a negative pressure airtight test on the product to be tested 4.

[0043] Specifically, the feeding mechanism 1 is located at the feeding end of the system, and the feeding mechanism 1 includes a feeding hopper 11, a vibration plate 12 and a loading device 13. The loading device 13 is used to take out the product 4 to be tested from the vibration plate 12 and accurately transfer it to each station on the rotating table 2. The loading device 13 of this embodiment is a mechanical arm or a suction cup that can clamp or absorb multiple products 4 to be tested at the same time. Preferably, the loading device 13 includes a multi-station material picking claw 14 that can move in the Z axis and the X axis. The material picking claw 14 can clamp the same number of products 4 to be tested as the product positioning groups 23 on the carrier main board 21 at one time and move them to the corresponding position. The rotating table 2 is located in the middle position of the system. A cam divider 20 is provided below the rotating table 2 to drive the rotating table 2 to rotate, and each rotation stays at the corresponding position. Four evenly distributed stations are provided on the rotating table 2, and the carrier main board 21 is installed on the station, and four product positioning groups 23 are provided on each carrier main board 21. The product positioning group 23 is used to fix the product to be tested 4. The product positioning group 23 includes an elastic seal 22, which is fixed on the carrier mainboard 21 by pre-embedded means. The elastic seal 22 contacts the top of the product to be tested 4 to form a sealed contact with the top of the product to be tested 4. The airtight probe 31 is connected to the rod of the product to be tested 4. The probe is provided with an air path 32 connected to the inside of the product to be tested, and the air path 32 is connected to the airtight detection system. When the airtight probe 31 is connected to the product to be tested and sealed, the airtight detection system evacuates the inside of the product to be tested 4 through the air path 32. After reaching the target value, a negative pressure airtight test is started. The pressure change within a preset time is detected by a pressure sensor to confirm the sealing of the product to be tested.

[0044] The airtightness detection device of this embodiment can simultaneously perform airtightness detection on multiple products 4 to be tested by designing a multi-station rotating table, a carrier main board 21 with multiple product positioning groups 23, and airtightness probes 31 corresponding to the number of product positioning groups 23 on the carrier main board 21, thereby improving the detection efficiency. The product positioning group 23 contacts one end of the product 4 to be tested through the elastic sealing member 22 pre-buried in the carrier main board 21 to form a seal, and the structure is simple and stable.

[0045] Furthermore, at least two positioning holes 211 are provided on the carrier mainboard 21 ; the elastic sealing member 22 includes a sealing ball 221 and an elastic supporting member 222 , the sealing ball 221 is supported by the elastic supporting member 222 and is pre-buried in the positioning hole 211 .

[0046] Specifically, the shape and size of the positioning hole 211 are set according to the design of the elastic sealing member 22 to ensure that the sealing ball 221 can be embedded smoothly. The sealing ball 221 can be a steel ball or a hemisphere with a smooth surface, and the elastic support member 222 can be a support member made of different types of springs or a support member made of a supporting and elastic material such as elastic rubber.

[0047] The sealing sphere 221 of this embodiment can be closely fitted to one end of the product 4 to be tested through the support of the elastic support member 222. This spherical sealing method can form an effective seal, adapt to products of different shapes and sizes, ensure that there will be no leakage during the negative pressure airtight test, and improve the accuracy of the test. The elastic support member 222 has a certain buffering effect, which can absorb the slight displacement or vibration that may be generated by the product 4 to be tested during the test, further ensuring the stability and reliability of the seal.

[0048] Furthermore, the product positioning group 23 includes a product pressing block 231 symmetrically arranged on both sides of the positioning hole 211, and a rotating connecting rod 232 connected to the product pressing block 231 and located below the carrier main board 21; the product pressing block 231 is used to rotate, open and press down above the carrier main board 21 under the drive of the rotating connecting rod 232 to fix the product 4 to be tested.

[0049] Specifically, one end of the product pressing block 231 can be connected to the rotating connecting rod 232 by a connection method such as a pin, a keyway or a thread. In a possible embodiment, the rotating connecting rod 232 is in an "L" shape to adapt to the spatial layout below the carrier mainboard 21, while ensuring sufficient leverage to drive the product pressing block 231, and the product pressing block 231 is connected to the rotating connecting rod 232 in a "Z" shape. The connecting point provided in the middle of the rotating connecting rod 232 usually adopts a precision bearing or sleeve structure to reduce friction and wear during rotation, ensure smooth and silent rotation, and maximize the opening angle of the product pressing block 231. When the bottom of the rotating connecting rod 232 is pushed to rotate upward, the lever effect of the connecting rod causes the product pressing block 231 to open around the connecting point to the side away from the positioning hole 211, forming an opening, which is convenient for the placement of the product 4 to be tested. When the top of the product 4 to be tested is placed downward, the product pressing block 231 rotates in the opposite direction and presses on the raised edge on the top of the product 4 to be tested, so as to fix the product 4 to be tested.

[0050] The design of the lever-type product positioning group 23 of this embodiment enables the product 4 to be fixed quickly and accurately during the testing process, thereby improving the efficiency of the testing.

[0051] Furthermore, a pressure block opening mechanism 24 is provided under the rotating table 2, and the pressure block opening mechanism 24 includes a push block group corresponding to the number of product positioning groups 23 on the carrier main board 21; each push block group includes two push blocks 241, and the push block group can move up and down, so that the rotating connecting rod 232 rotates under the push of the push block 241.

[0052] Specifically, a pressing block opening mechanism 24 is provided under the rotating table 2, which includes a push block group corresponding to the number of product positioning groups 23 on the carrier main board 21. Each push block group is composed of two push blocks 241, and the two push blocks 241 can move up and down synchronously. When it is necessary to open the product pressing block 231, the pushing block group moves upward under the drive of the pushing block driving member 242, such as a cylinder, an electric push rod, a hydraulic cylinder or other driving mechanism. The pushing block 241 pushes the rotating connecting rod 232 to rotate, thereby driving the product pressing block 231 to open, thereby realizing the positioning or release of the product 4 to be tested.

[0053] In a possible implementation, a guide slope 2411 is provided on the push block 241. The push block 241 contacts the bottom end of the rotating link 232 through the guide slope 2411. The pushing and guiding action of the guide slope 2411 on the rotating link 232 more effectively pushes the rotating link 232 to rotate. The guide slope enables the push block 241 to generate a larger thrust component when pushing the rotating link 232, thereby making it easier to overcome the rotation resistance of the rotating link 232 and improving the pushing efficiency. The guiding action of the guide slope 2411 can ensure that the push block 241 maintains a stable motion trajectory and thrust direction when pushing the rotating link 232, thereby improving the stability and reliability of the entire pressing block opening mechanism 24.

[0054] This embodiment can significantly shorten the opening and closing time of the product pressing block 231 by automatically controlling the up and down movement of the push block group and the rotation of the rotating connecting rod 232, thereby achieving rapid release and fixation of the product 4 to be tested, thereby improving production efficiency.

[0055] Furthermore, the airtight detection mechanism 3 includes a probe driving mechanism 33 , which is disposed above the airtight probe 31 and is used to drive the airtight probe 31 to press down and contact with the product 4 to be tested.

[0056] Specifically, the probe drive mechanism 33 can be a drive mechanism such as a cylinder, an electric push rod, a hydraulic cylinder, etc. The airtight detection mechanism 3 includes a first fixed plate 34 and a second fixed plate 35, and a plurality of airtight probes 31 are arranged at intervals through the first fixed plate and the second fixed plate 35. The driving end of the probe drive mechanism 33 drives the first fixed plate 34 and the second fixed plate 35 to drive the airtight probes 31 to move up and down synchronously.

[0057] Furthermore, the airtight probe 31 includes a pressure block section 311, a probe section 312, and a first elastic member 313 connected to each other; in one possible embodiment, the first elastic member 313 is sleeved on the outside of the pressure block section 311, so that the pressure block section 311 and the probe section 312 float in their axial direction. In another possible embodiment, the first elastic member 313 is sleeved on the outside of the probe section 312 or the connecting section between the pressure block section 311 and the probe section 312.

[0058] Specifically, the first elastic member 313 can be an elastic element such as a spring or a rubber sleeve. In this embodiment, the pressure block section 311 and the first fixed plate 34 are slidably connected via a first sleeve and a linear bearing, and the probe section 312 and the second fixed plate 35 are slidably connected via a second sleeve and a linear bearing. The first elastic member 313 is arranged between the first sleeve and the shoulder at one end of the pressure block section 311. Through the elastic deformation ability of the first elastic member 313, the pressure block section 311 and the probe section 312 have a certain floating range in the axial direction. This design enables the airtight probe 31 to effectively deal with the dimensional errors that may exist in the product to be tested, adapt to the products to be tested 4 of different sizes, improve the adaptability of the airtight probe 31, ensure the integrity of the seal, and improve the reliability of the test.

[0059] Furthermore, the probe section 312 includes an outer tube 3121, which is used to be sleeved on the outer side of the product to be tested 4. A sealing member 3122 is provided on the lower end surface of the outer tube 3121, and the sealing member 3122 contacts and seals with the outer wall of the product to be tested 4.

[0060] Specifically, the outer tube 3121 is tightly sleeved on the outside of the product to be tested 4. The inner diameter of the outer tube 3121 is slightly larger than the outer diameter of the product to be tested to ensure that the outer tube can easily slide into place and maintain a certain contact pressure. The seal 3122 is arranged on the inner wall or lower end surface of the outer tube 3121, and directly contacts the outer wall of the product to be tested 4 to achieve sealing. The seal 3122 can be made of a variety of materials, such as rubber, silicone or Teflon, etc., with excellent elasticity and corrosion resistance, and can maintain stable sealing performance under different temperature and pressure conditions. In this embodiment, the seal 3122 is a sealing ring embedded in the outer tube 3121. In this embodiment, the outer tube 3121 is sleeved on the outside of the rod of the valve, and the lower end surface of the outer tube 3121 abuts against the top of the valve. Through the close cooperation of the outer tube 3121 and the seal 3122, the sealing of the test can be ensured, thereby improving the accuracy of the test.

[0061] Furthermore, the probe section 312 includes an inner moving part 3123, which is slidably connected to the outer tube 3121, and the outer wall of the inner moving part 3123 is airtightly connected to the inner wall of the product (4) to be tested, and an air path 32 is provided in the inner moving part 3123.

[0062] Specifically, an inner layer connecting section 314 is provided in the probe section 312, and a second elastic member 315 is provided between the inner layer connecting section 314 and the inner layer moving member 3123. The second elastic member 315 is provided so that the inner layer moving member 3123 has a certain floating range in the axial direction, so that the inner layer of the airtight probe 31 can also effectively adjust the dimensional errors that may exist in the product to be tested, adapt to the products 4 to be tested of different sizes, improve the adaptability of the airtight probe 31, ensure the integrity of the seal, and improve the reliability of the test. The second elastic member 315 can be an elastic element such as a spring or a rubber sleeve. The inner layer moving member 3123 slides inside the outer layer tube 3121, and one end of the inner layer moving member 3123 forms an airtight connection with the inner wall of the product to be tested 4. An air path 32 is provided inside the inner layer moving member 3123, and the air path 32 is connected to the inside of the product to be tested 4, and the air path 32 is connected to the airtight detection system, so that the inside of the product to be tested is vacuumed through the air path 32, and the product to be tested 4 is subjected to a negative pressure airtight test.

[0063] Furthermore, the airtightness detection equipment also includes a discharging mechanism 5 for removing the tested products from the carrier mainboard 21 , wherein unqualified products are placed in an NG discharge frame 6 , and qualified products are placed in a finished product receiving frame 7 .

[0064] The working steps of this implementation of airtight testing equipment:

[0065] The feeding mechanism 1 is started, and the product 4 to be tested in the feeding hopper 11 is sorted by the vibration plate 12, and then accurately clamped by the feeding device 13 and transferred to the carrier main board 21 on the rotating table 2; it is fixed and sealed by the product positioning group 23, and the top of the product 4 to be tested contacts with the sealing ball 221, and through the support and buffering effect of the elastic support member 222, it is tightly fitted with the top of the product 4 to be tested to form a spherical seal. At the same time, the product pressing block 231 is driven by the rotating connecting rod 232 to rotate and press down, and press on the raised edge of the top of the product 4 to be tested, so as to fix the product 4 to be tested. The probe driving mechanism 33 of the airtight detection mechanism 3 is started, and the first fixing plate 34 and the second fixing plate 35 are driven to drive multiple airtight probes 31 to be pressed down synchronously; the outer layer tube 3121 of the airtight probe 31 is tightly sleeved on the outer side of the product 4 to be tested, and the sealing member 3122 on the lower end surface contacts and seals with the outer wall of the product 4 to be tested. At the same time, the inner moving part 3123 slides inside the outer tube 3121 to form an airtight connection with the inner wall of the product 4 to be tested. The airtight detection system is started, and the inside of the product 4 to be tested is vacuumed through the air circuit 32 until the predetermined vacuum target value is reached. After reaching the target vacuum, the airtight detection equipment monitors the pressure change within a preset time, such as 3 seconds, through a pressure sensor; based on the pressure change data monitored by the pressure sensor, the airtight detection equipment determines whether the sealing of the product 4 to be tested is qualified. If the pressure change is within the allowable range, it is judged to be qualified; otherwise, it is judged to be unqualified. After the test is completed, the rotating table 2 rotates to the next station, the pressure block opening mechanism 24 is started, and the push block group moves up and down to push the rotating connecting rod 232 to rotate, so that the product pressure block 231 opens and releases the product 4 to be tested. At the same time, the probe drive mechanism 33 drives the airtight probe 31 to rise and reset. The discharging mechanism 5 removes the tested products from the carrier mainboard 21 , wherein unqualified products are placed in the NG discharge frame 6 , and qualified products are placed in the finished product receiving frame 7 .

[0066] The airtightness detection equipment of the present application realizes automated and efficient testing of hollow tubular products such as valves, and can complete the detection of a group of products on a carrier mainboard within 2.0 seconds, significantly improving production efficiency and reducing labor costs.

[0067] Obviously, the embodiments described above are only embodiments of a part of the embodiments of this specification, rather than all embodiments. Based on the embodiments in the embodiments of this specification, ordinary technicians in this field can make other different forms of changes or modifications without making creative work, which should all fall within the scope of protection of the embodiments of this specification.

[0068] Those skilled in the art will readily appreciate other implementations of the embodiments of the present specification after considering the specification and practicing the invention disclosed herein. The present specification is intended to cover any variations, uses, or adaptations of the embodiments of the present specification, which follow the general principles of the embodiments of the present specification and include common knowledge or customary technical means in the art that are not disclosed in the embodiments of the present specification. The description and embodiments are to be considered merely as exemplary, and the true scope and spirit of the embodiments of the present specification are indicated by the following claims.

[0069] It should be understood that the embodiments of the present specification are not limited to the precise structures described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present specification is limited only by the appended claims.

Claims

1. An airtightness testing device, used for testing the airtightness of a hollow tubular product (4) to be tested, characterized in that: include: A feeding mechanism (1) for feeding and transferring the product to be tested (4) to the rotating table (2); A rotating table (2) is provided with a plurality of workstations evenly distributed along a circumference, each of the workstations is provided with a carrier mainboard (21), the carrier mainboard (21) is provided with at least two product positioning groups (23), the product positioning groups (23) include elastic sealing members (22), and the elastic sealing members (22) are used to contact with one end of the product to be tested (4) to form a seal; An airtight detection mechanism (3) is arranged above the rotating table (2), and comprises airtight probes (31) corresponding in number to the product positioning groups (23) on the carrier mainboard (21), the airtight probes (31) being used to be connected to the other end of the product to be tested (4); an air path (32) communicating with the interior of the product to be tested (4) is provided inside the airtight probe (31), the air path (32) being used to be connected to an airtight detection system so as to perform a negative pressure airtight test on the product to be tested (4).

2. The airtightness detection device according to claim 1, characterized in that: At least two positioning holes (211) are provided on the carrier mainboard (21); the elastic sealing member (22) comprises a sealing ball (221) and an elastic supporting member (222); the sealing ball (221) is supported by the elastic supporting member (222) and is pre-buried in the positioning hole (211).

3. The airtightness detection device according to claim 2, characterized in that: The product positioning group (23) comprises product pressing blocks (231) symmetrically arranged on both sides of the positioning hole (211), and a rotating connecting rod (232) connected to the product pressing blocks (231) and located below the carrier main board (21); The product pressing block (231) is used to rotate, open and press downward above the carrier mainboard (21) under the drive of the rotating connecting rod (232) to fix the product to be tested (4).

4. The airtightness detection device according to claim 1, characterized in that: A pressing block opening mechanism (24) is provided below the rotating platform (2), and the pressing block opening mechanism (24) comprises a pushing block group corresponding to the number of the product positioning groups (23) on the carrier mainboard (21); Each of the push block groups comprises two push blocks (241), and the push block group can move up and down, so that the rotating connecting rod (232) rotates under the push of the push blocks (241).

5. The airtightness detection device according to claim 1, characterized in that: The airtight detection mechanism (3) comprises a probe driving mechanism (33), wherein the probe driving mechanism (33) is arranged above the airtight probe (31) and is used to drive the airtight probe (31) to press downward to contact the product to be tested (4).

6. The airtightness detection device according to claim 5, characterized in that: The airtight probe (31) comprises a pressure block section (311), a probe section (312), and a first elastic member (313) which are connected to each other; the first elastic member (313) is sleeved on the outside of the pressure block section (311) so that the pressure block section (311) and the probe section (312) float in their axial direction.

7. The airtightness detection device according to claim 6, characterized in that: The probe section (312) comprises an outer tube (3121), and the outer tube (3121) is used to be sleeved on the outside of the product (4) to be tested.

8. The airtightness detection device according to claim 7, characterized in that: A sealing member (3122) is provided on the lower end surface of the outer tube (3121), and the sealing member (3122) contacts and seals with the outer wall of the product to be tested (4).

9. The airtightness detection device according to claim 7, characterized in that: The probe section (312) comprises an inner layer moving part (3123), the outer wall of the inner layer moving part (3123) is airtightly connected to the inner wall of the product to be tested (4), and the gas path (32) is provided inside the inner layer moving part (3123).

10. The airtightness detection device according to claim 9, characterized in that: The inner layer moving member (3123) is slidably connected to the outer layer tube (3121).

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