Air tightness testing apparatus

Abstract

The utility model relates to airtightness detection field provides a kind of airtightness detection equipment, comprising: feeding detection device, is equipped with feeding position, feeding detection device is used to detect the size specification of the product to be measured located at feeding position;Airtight detection device, is equipped with detection position, airtight detection device is used to detect the airtightness of the product to be measured located at detection position;Conveying device, connect feeding position and detection position, for the product to be measured from feeding position is conveyed to detection position;Positioner, is equipped with the first mobile part and second mobile part that can be mutually close or far away, the product to be measured located at detection position can be positioned and clamped between the first mobile part and second mobile part, the stroke of first mobile part and / or second mobile part is adjustable.The utility model reduces the production cost of electric heating inner bag airtightness detection, improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to airtightness testing equipment. Background Technology

[0002] During the production of electric heating liners, it is necessary to test their airtightness. In actual production testing, different sizes of electric heating liners are tested. However, current positioning fixtures have poor compatibility with different sizes and specifications. When changing the specifications of the electric heating liner, the corresponding positioning fixture needs to be changed to ensure the consistency of the relative position between the electric heating liner and the testing device, thereby ensuring consistent airtightness testing. This results in high changeover costs and reduced testing efficiency. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes an airtightness testing device that can reduce the conversion cost of airtightness testing for electric heating inner tanks and improve testing efficiency.

[0004] The airtightness testing device according to a first aspect embodiment of the present invention includes:

[0005] A feeding detection device is provided with a feeding position, and the feeding detection device is used to detect the size and specifications of the product to be tested located at the feeding position;

[0006] An airtightness testing device is provided with a detection position, and the airtightness testing device is used to detect the airtightness of the product to be tested located at the detection position;

[0007] A conveying device, connecting the loading station and the detection station, is used to convey the product to be tested from the loading station to the detection station;

[0008] The positioning device includes a first moving part and a second moving part that can move closer to or further away from each other. The product to be tested, located at the detection position, can be positioned and clamped between the first moving part and the second moving part. The stroke of the first moving part and / or the second moving part is adjustable.

[0009] According to one embodiment of the present invention, the feeding detection device is provided with a plurality of alignment slots, and each alignment slot is provided with a proximity sensor; when the product to be tested is located at the feeding position, the specification marking structure on the product to be tested is located in one of the alignment slots.

[0010] According to one embodiment of the present invention, the positioning device includes:

[0011] A linear drive mechanism is located on one side of the detection position, and the first moving part is disposed at the moving end of the linear drive mechanism;

[0012] An elastic abutment mechanism is located on the other side of the detection position, and the second moving part is disposed at the moving end of the elastic abutment mechanism.

[0013] According to one embodiment of the present invention, the linear drive mechanism is an electric cylinder, and the elastic support mechanism is a pneumatic cylinder.

[0014] According to one embodiment of the present invention, the airtightness detection device includes:

[0015] A spray assembly, including a nozzle, is used to spray water mist onto the test portion of the product to be tested located at the detection position;

[0016] An airtightness detection component includes an ultrasonic detector for receiving ultrasonic signals generated when the product under test leaks gas.

[0017] According to one embodiment of the present invention, the airtightness detection component further includes:

[0018] A shielding box, wherein the ultrasound detector is retractably connected to the shielding box and can switch between a first position inside the shielding box and a second position outside the shielding box;

[0019] A blower mechanism, wherein the air outlet of the blower mechanism is disposed inside the shielding box, and is used to blow air onto the detection surface of the ultrasonic detector located at the first position.

[0020] According to one embodiment of the present invention, the bottom of the conveying device is provided with a water collection trough, which extends along the moving direction of the conveying device.

[0021] According to one embodiment of the present invention, the spray assembly includes: a plurality of first nozzles arranged symmetrically about a vertical plane, a plurality of second nozzles spaced apart in a horizontal direction, and a plurality of third nozzles spaced apart around a horizontal axis; wherein the product to be tested has a cylindrical outer wall, the cylindrical outer wall is connected to an interface pipe assembly, and has a straight weld extending along its axial direction and an annular weld arranged along its circumference.

[0022] When the product to be tested is positioned at the detection position, the axis of the cylindrical outer wall is horizontally set, the interface tube assembly is located at the top of the cylindrical outer wall, a plurality of first nozzles are symmetrically distributed on both sides of the interface tube assembly and centered on the interface tube assembly in the axial direction, a plurality of second nozzles are centered on the straight weld in the axial direction, and a plurality of third nozzles surround the annular weld.

[0023] According to one embodiment of the present invention, the airtightness detection device further includes:

[0024] An inflation device, wherein the inflation head of the inflation device is installed on the first moving part or the second moving part; when the product to be tested is clamped between the first moving part and the second moving part, the inflation head is adapted to seal and press against the port at one end of the product to be tested, so that the inflation device communicates with the interior of the product to be tested.

[0025] According to one embodiment of the present invention, the airtightness detection device further includes:

[0026] A sealing assembly includes a second driving member and a sealing member. The sealing member is connected to the driving end of the second driving member, and the second driving member is used to drive the sealing member to seal and press against the interface tube on one side of the product under test.

[0027] According to one embodiment of the present invention, the conveying device includes:

[0028] Guide base;

[0029] A slide block is slidably disposed on the guide base and is adapted to hold the product to be tested;

[0030] The third driving component is installed on the guide base and connected to the slide, and is used to drive the slide to move along the guide base between the loading position and the detection position.

[0031] According to one embodiment of the present invention, it further includes:

[0032] The soundproof room, wherein the conveying device, the airtightness detection device and the positioning device are installed inside the soundproof room, and the loading detection device is installed outside the soundproof room;

[0033] The slide includes a base, a positioning seat, and a fourth driving member. The base is slidably disposed on the guide base. The positioning seat extends along the sliding direction of the base and is slidably disposed on the base. The positioning seat is suitable for placing the product to be tested. The fourth driving member is installed on the base and connected to the positioning seat, and is used to drive the positioning seat to move relative to the base.

[0034] The soundproof room is equipped with a movable door. When the movable door is open, the positioning seat can partially extend out of the soundproof room and reach the loading position. The above-mentioned one or more technical solutions in this embodiment of the present invention have at least one of the following technical effects:

[0035] By setting up a feeding and testing device and a positioning device, and connecting the feeding position of the feeding and testing device and the testing position of the airtightness testing device via a conveying device, the product to be tested after completing specification testing at the feeding position is transferred to the testing position. The positioning device can adjust the positioning of the product to be tested at the testing position according to the specifications detected by the feeding and testing device, so as to ensure that the product to be tested has a good relative position with the airtightness testing device during testing, thereby ensuring the consistency of airtightness testing for products of different sizes. This utility model embodiment can be applied to the testing of products of different sizes and specifications, reducing production changeover costs and improving testing efficiency.

[0036] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is one of the structural schematic diagrams of the airtightness testing device provided in the embodiments of this utility model.

[0039] Figure 2 The product under test is located in Figure 1 A top view of the detection position in the image.

[0040] Figure 3 This is a schematic diagram of the airtightness detection component in an embodiment of this utility model.

[0041] Figure 4 yes Figure 3 A partial structural diagram of the airtightness detection component.

[0042] Figure 5 This is one of the intentions of the distribution of the plurality of first nozzles in the embodiments of this utility model.

[0043] Figure 6 yes Figure 5 A schematic diagram of multiple first nozzles from another perspective.

[0044] Figure 7 This is one of the intentions behind the distribution of the multiple second nozzles in the embodiments of this utility model.

[0045] Figure 8 yes Figure 7A schematic diagram of multiple secondary nozzles from another perspective.

[0046] Figure 9 This is one of the intentions behind the distribution of the multiple third nozzles in the embodiments of this utility model.

[0047] Figure 10 yes Figure 9 A schematic diagram of multiple third nozzles from another perspective.

[0048] Figure 11 This is the second structural schematic diagram of the airtightness testing device provided in this embodiment of the utility model.

[0049] Figure label:

[0050] 100. Feeding detection device; 101. Feeding position; 11. Alignment slot; 12. Proximity sensor;

[0051] 200. Air tightness detection device; 201. Detection position; 21. Spray assembly; 211. First nozzle; 212. Second nozzle; 213. Third nozzle; 22. Air tightness detection assembly; 221. Ultrasonic detector; 222. Shielding box; 223. Blowing mechanism; 224. First drive component; 23. Sealing assembly; 231. Second drive component; 232. Sealing component;

[0052] 300. Conveying device; 31. Guide base; 32. Slide; 321. Base; 322. Positioning seat; 33. Water collection tank;

[0053] 400. Positioning device; 41. Linear drive mechanism; 42. Elastic support mechanism;

[0054] 500. Soundproof room; 51. Movable door;

[0055] 600. Product to be tested; 61. Columnar outer wall; 62. First end; 63. Second end; 631. Port; 64. Interface pipe assembly; 65. Specification marking structural component; 66. Straight weld; 67. Circular weld; 67a. First circular weld; 67b. Second circular weld. Detailed Implementation

[0056] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0057] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0059] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] like Figure 1As shown, the airtightness testing equipment provided in this embodiment of the present invention includes a feeding and testing device 100, a conveying device 300, an airtightness testing device 200, and a positioning device 400. The feeding and testing device 100 has a feeding position 101, which is used to detect the size and specifications of the product 600 to be tested located at the feeding position 101. The airtightness testing device 200 has a testing position 201, which is used to detect the airtightness of the product 600 to be tested located at the testing position 201. The conveying device 300 connects the feeding position 101 and the testing position 201, and is used to convey the product 600 to be tested from the feeding position 101 to the testing position 201. The positioning device 400 has a first moving part and a second moving part that can move closer to or further away from each other. The product 600 to be tested located at the testing position 201 can be positioned and clamped between the first moving part and the second moving part, and the stroke of the first moving part and / or the second moving part is adjustable.

[0062] Among them, the product to be tested 600 can be an electric heating inner tank, or a water tank or other product with a cavity that needs to be tested for air tightness.

[0063] It is understood that the conveying device 300 has a movable end capable of moving between the loading position 101 and the detection position 201, which moves the product 600 to be tested from the loading position 101 to the detection position 201. When the product 600 is at the loading position 101, its specifications are detected by the loading detection device 100. For example, its size and specifications can be determined by scanning the product information on the product 600; the position information of the product 600 at the loading position 101 can be detected by a position sensor, and the size and specifications of the product 600 can be determined based on the position information; or an image of the product 600 can be captured by a camera, and the size and specifications of the product 600 can be determined by image analysis. This embodiment does not impose specific limitations on the detection method of the inner liner size by the loading detection device 100.

[0064] When the product under test 600 reaches the detection position 201, it is located between the first moving part and the second moving part. By bringing the first and second moving parts closer together, the product under test 600 is clamped between them. Different sizes and specifications of inner liner require different positioning positions. The position of the product under test 600 can be adjusted by adjusting the stroke of the first moving part and / or the second moving part to ensure that the product under test 600 and the airtightness testing device 200 have a good relative position, thereby ensuring the consistency of airtightness testing.

[0065] In this process, after the feeding and testing device 100 detects the specifications of the inner liner, the conveying device 300 transports the product to be tested 600 to the testing position 201 of the airtightness testing device 200. The positioning device 400 controls the first and second moving parts to move closer together based on the specifications, and adjusts the position of the inner liner by adjusting the stroke of the first and / or second moving parts. After the airtightness test is completed, the first and second moving parts move away from each other, and the conveying device 300 can move the product to be tested 600 to its discharge end for discharge.

[0066] The airtightness testing equipment provided in this embodiment of the invention comprises a feeding and testing device 100 and a positioning device 400. A conveying device 300 connects the feeding position 101 of the feeding and testing device 100 and the testing position 201 of the airtightness testing device 200. The product 600, having completed specification testing at the feeding position 101, is transferred to the testing position 201. The positioning device 400 adjusts the position of the product 600 at the testing position 201 according to the specifications detected by the feeding and testing device 100, ensuring a good relative position between the product 600 and the airtightness testing device 200 during testing. This ensures consistency in airtightness testing for products 600 of different sizes. This embodiment of the invention is applicable to the testing of products 600 of different sizes and specifications, reducing changeover costs and improving testing efficiency.

[0067] like Figure 2 As shown, in some embodiments of this utility model, the feeding detection device 100 is provided with a plurality of alignment slots 11, and a proximity sensor 12 is provided in each alignment slot 11. When the product to be tested 600 is located at the feeding position 101, the specification marking structure 65 on the product to be tested 600 is located in one of the alignment slots 11.

[0068] Specifically, the specification marking structure 65 is a component protruding from the outside of the product under test 600. When the product under test 600 is loaded to the loading position 101, the specification marking structure 65 is located in one of the alignment slots 11. The proximity sensor 12 in the alignment slot 11 is triggered and generates corresponding detection information. The equipment control system determines the size specifications of the product under test 600 based on this detection information. Where the product under test 600 has multiple specification marking structures 65, each specification marking structure 65 is located in one of the multiple alignment slots 11.

[0069] For example, the product under test 600 is an electric heating inner liner. Two mounting plates are spaced apart along the axial direction on the outer wall of the inner liner, serving as two specification marking structural components 65. When the inner liner is at the loading position 101, the two mounting plates are located in two of the alignment slots 11. The proximity sensors 12 in the two alignment slots 11 are triggered and generate corresponding detection information, thereby determining the size and specifications of the inner liner. Figure 2 As shown, there are six alignment slots 11, corresponding to the testing of three sizes of the test product 600.

[0070] like Figure 1 As shown, in some embodiments of this utility model, the positioning device 400 includes a linear drive mechanism 41 and an elastic support mechanism 42. The linear drive mechanism 41 is located on one side of the detection position 201, and a first moving part is disposed at the moving end of the linear drive mechanism 41. The elastic support mechanism 42 is located on the other side of the detection position 201, and a second moving part is disposed at the moving end of the elastic support mechanism 42.

[0071] The linear drive mechanism 41 and the elastic support mechanism 42 are respectively located on both sides of the conveying direction of the conveying device 300. The stroke of the first moving part is adjustable, while the stroke of the second moving part is not adjustable and it can be in a floating state relative to the first moving part. The second moving part is used to cooperate with the first moving part to assist in clamping the product 600 to be tested.

[0072] When positioning the product under test 600, the linear drive mechanism 41 pushes the first moving part to the set position according to the size and specifications detected by the feeding detection device 100, and the elastic support mechanism 42 pushes the second moving part to move in the direction of the first moving part, so that the product under test 600 is clamped between the first moving part and the second moving part.

[0073] Optionally, the linear drive mechanism 41 is an electric cylinder, and the elastic support mechanism 42 is a pneumatic cylinder. When the electric cylinder pushes the product under test 600 to move to the set position, the product under test 600 can push the piston of the pneumatic cylinder in the opposite direction, that is, the pneumatic cylinder provides elastic support force for the product under test 600.

[0074] It should be noted that the linear drive mechanism 41 is not limited to an electric cylinder; for example, it can also be a pneumatic or hydraulic servo drive mechanism. The elastic support mechanism 42 is also not limited to a cylinder; for example, the elastic support mechanism 42 includes a movable seat that can move closer to or further away from the first movable part under the action of the drive member, and the second movable part is connected to the movable seat through an elastic member.

[0075] like Figure 1As shown, in some embodiments of this utility model, the airtightness detection device 200 includes a spray assembly 21 and an airtightness detection assembly 22. The spray assembly 21 includes a nozzle for spraying water mist onto the test portion of the product 600 located at the detection position 201. The airtightness detection assembly 22 includes an ultrasonic detector 221 for receiving ultrasonic signals generated when the product 600 leaks gas.

[0076] Optionally, the ultrasonic detector 221 is equipped with an ultrasonic microphone array. The system can determine the airtightness of the product 600 by analyzing the ultrasonic signal. When performing airtightness testing on the product 600, water mist is sprayed onto the test area of ​​the product 600 through multiple nozzles, so that the test area is covered by a water film, which can improve the detection accuracy of ultrasonic testing.

[0077] Traditional methods for testing the airtightness of electric heating element liners involve inflating and sealing the liner before immersing it in a water bath. Air tightness is determined by detecting bubbles emerging from the tested area. This method requires high-quality water, frequent water changes, and consumes a large amount of water, while also demanding high waterproof ratings from the components. This embodiment utilizes a spray assembly 21 and an ultrasonic detector 221 to achieve airtightness testing of the electric heating element liners, reducing the requirements for waterproof ratings and water consumption, thereby lowering equipment and testing costs.

[0078] like Figure 3 and Figure 4 As shown in the embodiment of this utility model, the airtightness detection component 22 further includes a shielding box 222 and a blower mechanism 223. The ultrasonic detector 221 is retractably disposed in the shielding box 222 and can switch between a first position located inside the shielding box 222 and a second position located outside the shielding box 222. The air outlet of the blower mechanism 223 is disposed inside the shielding box 222 and is used to blow air onto the detection surface of the ultrasonic detector 221 located in the first position.

[0079] Understandably, the shielding box 222 has a receiving cavity and an opening connecting the receiving cavity. The ultrasonic detector 221 is able to pass through the opening to move between a first position and a second position. The air outlet of the blower mechanism 223 is located within the receiving cavity.

[0080] When no detection is required, i.e. when the ultrasonic detector 221 is in a non-working state, the ultrasonic detector 221 moves to the first position, i.e., it is located in the receiving cavity. The shield box 222 blocks external water mist, and at the same time, the blower mechanism 223 blows dry air to the detection surface of the ultrasonic detector. While drying the detection surface, it can also form wind pressure in the receiving cavity to prevent external water vapor from entering and prevent the ultrasonic detector 221 from being exposed to a humid environment for a long time, causing water droplets to condense on the detection surface and affecting its detection effect.

[0081] Optionally, the opening of the shielding box 222 is set downward to reduce the entry of external water mist into the shielding box 222. The detection surfaces of the ultrasonic detectors 221 are set in a horizontal direction, and the air outlet of the blower mechanism 223 has multiple air outlet holes arranged in a vertical direction, so that the air blown out can cover the detection surface and improve the drying efficiency of the detection surface.

[0082] Optionally, the airtightness detection device 200 includes a plurality of airtightness detection components 22, which are distributed on different sides of the detection position 201. For example, two airtightness detection components 22 are arranged at intervals along the conveying direction of the conveying device 300 and are located on opposite sides of the detection position 201.

[0083] Furthermore, the airtightness detection assembly 22 also includes a first drive member 224, which is mounted on the shielding box 222 and connected to the ultrasonic detector 221, for driving the ultrasonic detector 221 to move between a first position and a second position. Specifically, the opening of the shielding box 222 is downward, the first drive member 224 is mounted on the top of the shielding box 222, and its drive end passes through the shielding box 222 and is connected to the ultrasonic detector 221. Optionally, the first drive member 224 can be a linear drive member, such as an electric actuator or a linear module.

[0084] See Figure 1 In this embodiment of the invention, a water collection trough 33 is provided at the bottom of the conveying device 300, and the water collection trough 33 extends along the moving direction of the conveying device 300. The water collection trough 33 is used to collect water sprayed from the nozzle. The fact that the water collection trough 33 extends along the moving direction of the conveying device 300 ensures that all the water on the conveying device 300 is collected into the water collection trough 33, which helps to maintain a clean environment around the testing equipment.

[0085] Furthermore, the nozzle is connected to a water supply device, and the water collection tank 33 can be connected to the water supply device through a pipeline to return the collected water to the water supply device, thereby realizing water recycling and further reducing water consumption.

[0086] In some embodiments of this utility model, the airtightness testing device 200 further includes an inflation device, the inflation head of which is installed on the first moving part or the second moving part. When the product under test 600 is clamped between the first moving part and the second moving part, the inflation head is adapted to seal and press against the port 631 at one end of the product under test 600, so that the inflation device communicates with the interior of the product under test 600.

[0087] Among them, see Figure 2The product under test 600 has a port 631 at one end. The inflation head of the inflation device is mounted on the second moving part. When the product under test 600 is located at the detection position 201, port 631 of the product under test 600 faces the inflation head. When the first and second moving parts press the product under test 600 together, the inflation head is pressed between port 631 and the second moving part, and the inflation head and port 631 are sealed together. Then, the inside of the product under test 600 can be inflated using the inflation device. After inflation is complete, the airtightness test can be performed.

[0088] Furthermore, such as Figure 1 As shown, the airtightness testing device 200 also includes a sealing assembly 23. The sealing assembly 23 includes a second driving member 231 and a sealing member 232. The sealing member 232 is connected to the driving end of the second driving member 231. The second driving member 231 is used to drive the sealing member 232 to seal and press against the interface tube on one side of the product under test 600. The product under test 600 has an interface tube on its side wall; during airtightness testing, both the port 631 of the product under test 600 and the interface tube need to be sealed.

[0089] Optionally, the airtightness testing device also includes a frame, with the detection position 201 located within the frame and the second drive component 231 mounted on top of the frame. When the product under test 600 is positioned at the detection position 201, the interface tube is located on top of the product under test 600 and opposite to the sealing component 23. At this time, the second drive component 231 drives the sealing component 232 to move downward, thereby sealing the interface tube. There are typically multiple interface tubes, and correspondingly multiple sealing components 23 are provided.

[0090] like Figure 5 , Figure 8 and Figure 9 As shown, in this embodiment of the present invention, the spray assembly 21 includes a plurality of first nozzles 211 arranged symmetrically about a vertical plane, a plurality of second nozzles 212 arranged at intervals along a horizontal direction, and a plurality of third nozzles 213 arranged at intervals around a horizontal axis. See also... Figure 2 The product under test 600 has a cylindrical outer wall 61, to which an interface pipe assembly 64 is connected. The cylindrical outer wall 61 has a straight weld 66 extending axially and an annular weld 67 arranged circumferentially. When the product under test 600 is positioned at the detection position 201, the axis of the cylindrical outer wall 61 is horizontal. The interface pipe assembly 64 is located at the top of the cylindrical outer wall 61. Multiple first nozzles 211 are symmetrically distributed on both sides of the interface pipe assembly 64 and axially centered relative to the interface pipe assembly 64. Multiple second nozzles 212 are axially centered relative to the straight weld 66. Multiple third nozzles 213 surround the annular weld 67.

[0091] The product under test 600 includes a cylindrical outer wall 61, a first end 62, a second end 63, and an interface pipe assembly 64. The cylindrical outer wall 61 is typically formed by welding two connecting edges of a rectangular plate, thus creating a straight weld 66 extending axially. The two axial ends of the cylindrical outer wall 61 are respectively welded circumferentially to the first end 62 and the second end 63, forming a first annular weld 67a and a second annular weld 67b. The interface pipe assembly 64 includes multiple interface pipes arranged axially along the cylindrical outer wall 61, and the interface pipes are typically welded to the cylindrical outer wall 61. Air tightness testing is required at the straight weld 66, the first annular weld 67a, the second annular weld 67b, and the interface pipe assembly 64 of the product under test 600. The position of the annular weld 67 along the axial direction of the cylindrical outer wall 61 varies for products of different sizes and specifications.

[0092] When centering the product under test 600, the first moving part abuts against the first end 62, and the second moving part abuts against the second end 63. The port 631 of the product under test 600 is located at the second end 63, and the inflation head installed on the second mounting part is sealed and pressed tightly against the port 631.

[0093] Multiple first nozzles 211, multiple second nozzles 212, and multiple third nozzles 213 are mounted on a frame. The product 600 under test is centered by the positioning device 400, so that the interface pipe assembly 64 is centered relative to the multiple first nozzles 211, the straight weld 66 is centered relative to the multiple second nozzles 212, and the annular weld 67 is located within the effective spray range of the multiple third nozzles 213. This ensures that a uniform water film can be formed at the straight weld 66, the first annular weld 67a, the second annular weld 67b, and the interface pipe assembly 64, which helps to improve the accuracy of airtightness testing.

[0094] See Figure 5 and Figure 6 The number of first nozzles 211 is two, and the two first nozzles 211 are arranged symmetrically about the vertical plane. Of course, the number of first nozzles 211 can also be four or six, etc., and the specific number can be determined according to the range of the axial distribution of the interface tube assembly 64 along the cylindrical outer wall 61. When the product under test 600 is positioned at the detection position 201, the interface tube assembly 64 at the top of the product under test 600 is located in the center below the multiple first nozzles 211.

[0095] See Figure 7 and Figure 8 There are two second nozzles 212, which are arranged axially at intervals along the outer wall 61 of the column. Of course, the number of second nozzles 212 can also be three or four, etc., and the specific number can be determined according to the length of the straight weld 66. When the product to be tested 600 is positioned at the detection position 201, the multiple second nozzles 212 face the straight weld 66 and are centered relative to the straight weld 66.

[0096] See Figure 9 and Figure 10 Six third nozzles 213 are arranged around an annular weld 67 to ensure uniform water mist distribution. Alternatively, four or more third nozzles 213 can be used, depending on the circumference of the annular weld 67. Specifically, six third nozzles 213 are arranged along the first annular weld 67a, and another six along the second annular weld 67b. When the product under test 600 is positioned at the detection position 201, the first annular weld 67a corresponds to the six third nozzles 213, and the second annular weld 67b corresponds to the other six third nozzles 213. The axial position of the third nozzles 213 on the cylindrical outer wall 61 should accommodate the distribution range of the annular weld 67 for products of various sizes and specifications, ensuring that the annular weld 67 of products of various sizes and specifications can be effectively covered by water mist.

[0097] like Figure 1 As shown in the embodiment of this utility model, the conveying device 300 includes a guide base 31, a slide 32, and a third driving member. The slide 32 is slidably disposed on the guide base 31 and is suitable for placing the product 600 to be tested. The third driving member is installed on the guide base 31 and connected to the slide 32, and is used to drive the slide 32 to move along the guide base 31 between the loading position 101 and the detection position 201.

[0098] When the equipment starts testing, the third drive unit drives the slide 32 to the loading position 101, placing the product to be tested 600 on the slide 32, enabling the loading and testing device 100 to detect the specifications of the product to be tested 600. Then, the third drive unit drives the slide 32 to the detection position 201, where the positioning device 400 centers the product to be tested 600. The water collection tank 33 is located below the guide base 31.

[0099] like Figure 11As shown, the airtightness testing equipment provided in this embodiment of the present invention also includes a soundproof chamber 500, a conveying device 300, an airtightness testing device 200, and a positioning device 400 disposed inside the soundproof chamber 500, and a loading testing device 100 disposed outside the soundproof chamber 500. The slide block 32 includes a base 321, a positioning seat 322, and a fourth driving member. The base 321 is slidably disposed on the guide base 31, and the positioning seat 322 extends along the sliding direction of the base 321 and is slidably disposed on the base 321. The positioning seat 322 is suitable for placing the product 600 to be tested. The fourth driving member is installed on the base 321 and connected to the positioning seat 322, and is used to drive the positioning seat 322 to move relative to the base 321. The soundproof chamber 500 is provided with a movable door 51. When the movable door 51 is open, the positioning seat 322 can partially extend out of the soundproof chamber 500 and reach the loading position 101.

[0100] Specifically, the third driving component is fixed to the guide base 31 and drivenly connected to the base 321, used to drive the base 321 to slide relative to the guide base 31. The fourth driving component is fixed to the base 321 and drivenly connected to the positioning seat 322, used to drive the positioning seat 322 to slide relative to the base 321, the sliding direction of the base 321 being the same as the sliding direction of the positioning seat 322. One end of the guide base 31 is close to the movable door 51, and the loading detection device 100 is arranged opposite to the door. During loading, the movable door 51 of the soundproof room 500 is opened, the third driving component drives the base 321 to move to one end of the guide base 31, and the fourth driving component drives the positioning seat 322 to move towards the outside of the soundproof room 500, so that one end of the positioning seat 322 is located on the loading position 101 of the loading detection device 100. After the product specification test is completed, the fourth drive unit drives the positioning seat 322 to retract into the quiet room 500, the movable door 51 closes, and the third drive unit drives the base 321 to move towards the test position 201, so that the product to be tested 600 located on it reaches the test position 201.

[0101] In this embodiment, by setting up a soundproof room 500, the conveying device 300 and the feeding and detection device 100 are detachably connected through the cooperation of the guide base 31, base 321, positioning seat 322, third driving component and fourth driving component of the conveying device 300. This allows the soundproof room 500 to be closed during the detection process, creating a quiet environment for detection and improving the detection effect.

[0102] Furthermore, the slide 32 is provided with a positioning groove. Specifically, a positioning seat is installed on the positioning seat 322, and the positioning seat is provided with a positioning groove. The product under test 600 has a cylindrical outer wall 61. The positioning groove and the cylindrical outer wall 61 are in upper limit engagement in the moving direction of the slide 32. The first moving part and the second moving part are provided on both sides of the guide base 31. It can be understood that the moving direction of the slide 32 is perpendicular to the axial direction of the cylindrical outer wall 61. The positioning groove and the cylindrical outer wall 61 are in upper limit engagement in the moving direction of the slide 32 to prevent the product under test 600 from moving relative to the slide 32 in the direction perpendicular to its axial direction. The positioning groove and the cylindrical outer wall 61 are in sliding engagement in the axial direction of the cylindrical outer wall 61. When the product under test 600 reaches the detection position 201, the product under test 600 can move relative to the slide 32 along its axial direction under the action of the first moving part and the second moving part to adjust to the centered state.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. An airtightness testing device, characterized in that, include: The feeding detection device (100) is provided with a feeding position (101). The feeding detection device (100) is used to detect the size and specifications of the product (600) to be tested located at the feeding position (101). An airtightness testing device (200) is provided with a detection position (201). The airtightness testing device (200) is used to detect the airtightness of the product under test (600) located at the detection position (201). A conveying device (300) is connected to the loading station (101) and the detection station (201) for conveying the product to be tested (600) from the loading station (101) to the detection station (201). The positioning device (400) is provided with a first moving part and a second moving part that can move closer to or further away from each other. The product to be tested (600) located at the detection position (201) can be positioned and clamped between the first moving part and the second moving part. The stroke of the first moving part and / or the second moving part is adjustable.

2. The airtightness testing device according to claim 1, characterized in that, The feeding detection device (100) is provided with a plurality of alignment slots (11), and each alignment slot (11) is provided with a proximity sensor (12); when the product to be tested (600) is located at the feeding position (101), the specification marking structure (65) on the product to be tested (600) is located in one of the alignment slots (11).

3. The airtightness testing device according to claim 1, characterized in that, The positioning device (400) includes: A linear drive mechanism (41) is located on one side of the detection position (201), and the first moving part is disposed at the moving end of the linear drive mechanism (41). The elastic support mechanism (42) is located on the other side of the detection position (201), and the second moving part is disposed at the moving end of the elastic support mechanism (42).

4. The airtightness testing device according to claim 3, characterized in that, The linear drive mechanism (41) is an electric cylinder, and the elastic support mechanism (42) is a pneumatic cylinder.

5. The airtightness testing device according to claim 1, characterized in that, The airtightness detection device (200) includes: The spray assembly (21) includes a nozzle for spraying water mist onto the test portion of the product (600) located at the detection position (201); The airtightness detection component (22) includes an ultrasonic detector (221) for receiving ultrasonic signals generated when the product under test (600) leaks gas.

6. The airtightness testing device according to claim 5, characterized in that, The airtightness detection component (22) also includes: The shielding box (222) is to which the ultrasonic detector (221) is retractably connected and can switch between a first position inside the shielding box (222) and a second position outside the shielding box (222); A blower mechanism (223) is provided with its air outlet located inside the shield box (222) for blowing air onto the detection surface of the ultrasonic detector (221) located in the first position.

7. The airtightness testing device according to claim 5, characterized in that, The bottom of the conveying device (300) is provided with a water collection tank (33), which extends along the moving direction of the conveying device (300).

8. The airtightness testing device according to claim 5, characterized in that, The spray assembly (21) includes: a plurality of first nozzles (211) arranged symmetrically about a vertical plane, a plurality of second nozzles (212) spaced apart in a horizontal direction, and a plurality of third nozzles (213) spaced apart around a horizontal axis; wherein the product to be tested (600) has a cylindrical outer wall (61); the cylindrical outer wall (61) is connected to an interface pipe assembly (64) and has a straight weld (66) extending along its axial direction and an annular weld (67) arranged along its circumference. When the product under test (600) is positioned at the detection position (201), the axis of the cylindrical outer wall (61) is set horizontally, the interface tube assembly (64) is located at the top of the cylindrical outer wall (61), a plurality of first nozzles (211) are symmetrically distributed on both sides of the interface tube assembly (64) and centered on the interface tube assembly (64) in the axial direction, a plurality of second nozzles (212) are centered on the straight weld (66) in the axial direction, and a plurality of third nozzles (213) surround the annular weld (67).

9. The airtightness testing device according to claim 1, characterized in that, The airtightness detection device (200) also includes: An inflation device, wherein the inflation head of the inflation device is installed on the first moving part or the second moving part; when the product under test (600) is clamped between the first moving part and the second moving part, the inflation head is adapted to seal and press against the port (631) at one end of the product under test (600), so that the inflation device communicates with the interior of the product under test (600).

10. The airtightness testing device according to claim 9, characterized in that, The airtightness detection device (200) also includes: The sealing assembly (23) includes a second drive (231) and a seal (232). The seal (232) is connected to the drive end of the second drive (231). The second drive (231) is used to drive the seal (232) to seal and press against the interface tube on one side of the product under test (600).

11. The airtightness testing device according to claim 1, characterized in that, The conveying device (300) includes: Guide base (31); The slide (32) is slidably disposed on the guide base (31) and is suitable for placing the product to be tested (600). The third driving component is installed on the guide base (31) and connected to the slide (32) for driving the slide (32) to move along the guide base (31) between the loading position (101) and the detection position (201).

12. The airtightness testing device according to claim 11, characterized in that, Also includes: A soundproof room (500) is provided, wherein the conveying device (300), the airtightness detection device (200) and the positioning device (400) are provided inside the soundproof room (500), and the loading detection device (100) is provided outside the soundproof room (500); The slide (32) includes: a base (321), a positioning seat (322) and a fourth driving member. The base (321) is slidably disposed on the guide base (31). The positioning seat (322) extends along the sliding direction of the base (321) and is slidably disposed on the base (321). The positioning seat (322) is adapted to place the product to be tested (600). The fourth driving member is installed on the base (321) and connected to the positioning seat (322) for driving the positioning seat (322) to move relative to the base (321). The soundproof room (500) is equipped with a movable door (51). When the movable door (51) is open, the positioning seat (322) can extend partially out of the soundproof room (500) and reach the loading position (101).

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