Connection device and air permeability testing equipment

Abstract

The utility model relates to the technical field of air permeability testing, and discloses a connection device and air permeability testing equipment, including a rotating assembly, an elastic sealing sleeve and a plurality of connection assemblies, wherein the rotating assembly includes a fixing member, an outer rotating disk and an inner rotating disk, the elastic sealing sleeve has a first end and a second end, and the plurality of connection assemblies are circumferentially distributed around an axis, and the inner rotating disk is driven to rotate to drive the abutment member to push the connection member to swing relative to the fixing member to drive the first end of the elastic sealing sleeve to elastically deform and open, which can be sleeved on the outer peripheral wall of the container mouth, and is tightly wrapped around the outer peripheral wall of the container mouth under the action of the elastic restoring force, and can be suitable for container mouths of different calibers, and the second end is used to connect the connection pipe in the air permeability testing equipment, and the structure is simple and the sealing is reliable. After the test is completed, the connection with the container mouth can be released by driving the outer rotating disk to rotate the inner rotating disk to drive the abutment member to push the connection member to open the first end of the elastic sealing sleeve, and the assembly and disassembly are relatively convenient, and the elastic sealing sleeve can be reused.

Description

Technical Field

[0001] The utility model relates to the technical field of air permeability testing, in particular to a connecting device and air permeability testing equipment. Background Art

[0002] Air permeability is an important indicator for analyzing the quality of packaging materials. Generally, air permeability testing equipment is used to perform air permeability testing using the differential pressure method. It has the advantages of being simple, convenient, and inexpensive, and is widely used in air permeability testing of various packaging materials. For air permeability testing of packaging containers such as bottles and cans, when connecting the container mouth through a connecting device, it is necessary to ensure the sealing of the container mouth to prevent external air from entering the container, causing inaccurate data and affecting the test results. In the related art, the container mouth and the connecting device are sealed by glue, and it takes a certain amount of time for the glue to solidify before sealing. If there is contamination at the container mouth, the glue will fall off, resulting in failure of the seal. After the test, it is not convenient to disassemble the container mouth and the connecting device. Not only that, for container mouths of different sizes, it is necessary to replace the adaptable connecting device for docking, which has poor versatility. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a connection device that can be used for container openings of different diameters and can be easily disassembled and assembled, and also provides an air permeability testing device having the connection device.

[0004] The connecting device according to the first embodiment of the utility model includes a rotating component, an elastic sealing sleeve and a plurality of connecting components.

[0005] The rotating assembly includes a fixing member, an outer rotating disk and an inner rotating disk, wherein the outer rotating disk is sleeved on the outside of the inner rotating disk, and the outer rotating disk is driven by an external force to drive the inner rotating disk to rotate around an axis, and the outer rotating disk and the inner rotating disk are respectively rotatably connected to the fixing member, and the outer rotating disk, the inner rotating disk and the fixing member respectively have a central hole coaxial with the axis;

[0006] The elastic sealing sleeve is made of elastic material and has a cylindrical structure. The elastic sealing sleeve extends along the axial direction and is arranged in the central hole. The elastic sealing sleeve has a first end and a second end. The second end extends from the central hole to the outside of the outer turntable and is used to connect to a connecting pipe of an air permeability testing device.

[0007] A plurality of the connecting assemblies are distributed circumferentially around the axis, each of the connecting assemblies comprises a connecting member and an abutting member, one end of the connecting member is connected to the first end, and the other end is connected to the fixing member, one end of the abutting member is connected between the two ends of the connecting member, and the other end is connected to the inner rotating disk;

[0008] The inner turntable is driven to rotate so as to drive the abutment member to push the connecting member to swing relative to the fixing member to drive the first end of the elastic sealing sleeve to elastically deform and open, and the first end is used to be sleeved on the outer peripheral wall of the container mouth of the container to be tested so that the first end is sealed and connected to the container mouth through elasticity.

[0009] The connection device of the embodiment of the utility model has at least the following beneficial effects: the connection device is applied to the gas permeability test equipment, the first end of the elastic sealing sleeve is used to connect the container to be tested, and the second end is used to connect the connecting pipe in the gas permeability test equipment, thereby realizing the gas permeability test of the container to be tested. Among them, by driving the outer turntable to rotate the inner turntable to drive the abutment to push the connecting member to open the first end of the elastic sealing sleeve, it can be sleeved on the outer peripheral wall of the container mouth of the container to be tested. The elastic sealing sleeve is made of elastic material and can be suitable for container mouths of different calibers. When in use, it is only necessary to rotate the outer turntable to a certain extent when connecting, and open the first end to be sleeved on the outside of the container mouth. After releasing the driving force of the outer turntable, the first end of the elastic sealing sleeve is compressed and wrapped on the outer peripheral wall of the container mouth under the action of the elastic restoring force to realize the sealed connection, and the structure is simple and the sealing is reliable. After the test is completed, the connection with the container mouth can be released by driving the outer turntable to rotate the inner turntable to drive the abutment to push the connecting member to open the first end of the elastic sealing sleeve, which is convenient for assembly and disassembly and can be reused.

[0010] According to the connecting device of the embodiment of the utility model, a plane perpendicular to the axis is defined as a projection plane, on which a connection position S1 between the connecting member and the fixing member surrounds the outer periphery of a connection position S2 between the first end of the elastic sealing sleeve and the connecting member, and an angle is formed between the abutting member and the connecting member.

[0011] Furthermore, a hinged portion is provided between the two ends of the connecting member, the hinged portion is closer to the other end relative to the end of the connecting member connected to the elastic sealing sleeve, and the abutting member is hinged to the hinged portion.

[0012] Furthermore, the length of the abutment member is smaller than the length of the connection member.

[0013] According to the connecting device of the embodiment of the utility model, the outer rotating disk is provided with a first inner gear ring, and the inner rotating disk is provided with a first outer gear ring meshing with the first inner gear ring.

[0014] According to the connecting device of the embodiment of the utility model, in the natural state of the elastic sealing sleeve, the inner diameter of the port of the first end is smaller than the outer diameter of the container opening of the container to be tested.

[0015] According to the connecting device of the embodiment of the utility model, the number of the connecting components is six.

[0016] According to the connecting device of the embodiment of the utility model, the connecting device also includes an adjusting member, which includes an adjusting rod and a knob, one end of the adjusting rod is rotatably connected to the fixing member, and the other end extends along the direction of the axis and is connected to the knob, the outer peripheral wall of the adjusting rod is provided with a second outer gear ring, and the inner wall of the center hole of the outer turntable is provided with a second inner gear ring, and the second outer gear ring of the adjusting rod is meshed with the second inner gear ring of the outer turntable.

[0017] Furthermore, a channel is provided inside the adjusting member, and the channel penetrates the adjusting rod and the knob along the axial direction, and the second end of the elastic sealing sleeve is inserted into the channel.

[0018] According to an embodiment of the second aspect of the utility model, a permeability testing device comprises the connecting device of the embodiment of the first aspect, and a connecting tube, wherein the connecting tube is sealed and connected to the second end of the elastic sealing sleeve of the connecting device. The permeability testing device adopts the connecting device of the above embodiment, which can effectively solve the problem of difficult disassembly and assembly, and achieve reliable sealing, which is conducive to ensuring the sealing performance of the sample, ensuring the accuracy of the experimental data, and reducing manual errors. Compared with the solution of using glue sealing, there is no need to wait for the glue to solidify, thereby saving manpower and time, and also helping to improve the detection efficiency. In addition, the connecting device can be reused, which is conducive to reducing the waste of consumables.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the internal structure of the connecting device of an embodiment of the utility model;

[0021] Figure 2 It is a schematic cross-sectional view of the connecting device along the axis of an embodiment of the utility model, wherein the elastic sealing sleeve is in a free state;

[0022] Figure 3 for Figure 2 A schematic diagram showing the elastic sealing sleeve in the connecting device is shown in an open state.

[0023] Reference numerals:

[0024] Rotating assembly 100; outer rotating disk 110; first inner gear ring 111; second inner gear ring 112; first portion 113; second portion 114; inner rotating disk 120; first outer gear ring 121; fixing member 130; through hole 131;

[0025] Elastic sealing sleeve 200; first end 210; second end 220;

[0026] Connecting assembly 300; connecting member 310; hinged portion 311; abutting member 320;

[0027] Adjustment member 400; adjustment rod 410; second outer gear ring 411; knob 420;

[0028] Container mouth 500. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the concept and technical effects of the utility model in combination with the embodiments, so as to fully understand the purpose, features and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model.

[0030] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0031] In the description of the embodiments of the present utility model, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected on the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present utility model, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] At present, the oxygen permeability test adopts the isobaric method and the differential pressure method. The differential pressure method has the advantages of being simple, convenient, and inexpensive. The differential pressure method has always been used as a basic method in the field of gas permeability testing, and the universality of the test gas is also very good. In this test method, the focus of the test is on the pretreatment stage of the sample. For the oxygen permeability test of bottles, cans and other similar container samples, the focus is on ensuring the airtightness of the container to prevent external air from entering the container, causing inaccurate data and affecting the test results. In the related art, the test equipment has a connecting device for connecting the container mouth, and the connecting device is used to seal the container mouth with the container mouth, and then the container mouth and the connecting device of the equipment are sealed by glue. This method has a certain waste of glue consumables. Secondly, it also takes a certain amount of time to wait for the glue to solidify. The glue filling operation is performed manually. Certain operating errors, contamination of the container mouth and other factors will cause the glue to be partially or completely detached. After the test, it is difficult for the container mouth to be detached from the connecting device. For container mouths of different sizes, it is also necessary to replace the matching connecting device for docking, which has poor universality.

[0033] The embodiment of the utility model provides a connection device and a gas permeability test device including the connection device, which is used for the gas permeability test of the container to be tested. The connection device is suitable for container openings of different calibers, has strong versatility, can be easily disassembled and assembled, and has reliable sealing, which is beneficial to improving the detection accuracy and detection efficiency of the gas permeability test device and reducing the detection cost. The following is an introduction to the embodiment of the utility model in conjunction with the drawings of the specification:

[0034] Figure 1 This is a schematic diagram of the internal structure of the connecting device of an embodiment of the utility model. Figure 2 This is a schematic cross-sectional view of the connecting device along the axis of an embodiment of the utility model, wherein the elastic sealing sleeve is in a free state. Figure 3 for Figure 2 A schematic diagram showing the elastic sealing sleeve in the connecting device is shown in an open state.

[0035] refer to Figures 1 to 3 The connection device of the first embodiment of the utility model comprises a rotating assembly 100, an elastic sealing sleeve 200 and a plurality of connecting assemblies 300. The rotating assembly 100 is used to drive the connecting assembly 300 to drive the end of the elastic sealing sleeve 200 to open, so as to facilitate the sleeve to be covered on the outer peripheral wall of the container mouth 500 of the container to be tested.

[0036] Among them, the rotating assembly 100 includes a fixing part 130, an outer turntable 110 and an inner turntable 120. The outer turntable 110 is sleeved on the outside of the inner turntable 120. The outer turntable 110 is driven by an external force to drive the inner turntable 120 to rotate around an axis. The outer turntable 110 and the inner turntable 120 are respectively rotatably connected to the fixing part 130. The outer turntable 110, the inner turntable 120 and the fixing part 130 respectively have a center hole coaxial with the axis for the elastic sealing sleeve 200 to pass through.

[0037] The elastic sealing sleeve 200 is made of elastic material, for example, it can be silicone, latex, rubber, etc., and has the performance of elastic deformation. The elastic sealing sleeve 200 is a cylindrical structure, for example, it can be a rubber hose, a silicone hose, etc. of a set length, and the material source is wide. The elastic sealing sleeve 200 extends along the axial direction and is arranged in the center hole of the outer rotating disk 110, the inner rotating disk 120 and the fixing member 130. The elastic sealing sleeve 200 has a first end 210 and a second end 220. The first end 210 is used to be sleeved on the outer wall of the container mouth 500 of the container to be tested, and the second end 220 extends from the center hole to the outside of the outer rotating disk 110, and is used to connect the connecting pipe of the air permeability testing equipment, thereby realizing the air permeability test of the container.

[0038] A plurality of connection components 300 are circumferentially distributed around the rotation axis of the outer turntable 110 and the inner turntable 120. Each connection component 300 includes a connection member 310 and an abutment member 320. One end of the connection member 310 is connected to the first end 210 of the elastic sealing sleeve 200, and the other end of the connection member 310 is connected to the fixing member 130. One end of the abutment member 320 is connected between the two ends of the connection member 310, and the other end of the abutment member 320 is connected to the inner turntable 120. Therefore, the inner turntable 120 is driven to rotate to drive the abutment member 320 to push the connection member 310 to swing relative to the fixing member 130. The swing of the connection member 310 can drive the first end 210 of the elastic sealing sleeve 200 to elastically deform and open. The first end 210 is used to be sleeved on the outer peripheral wall of the container mouth 500 of the container to be tested, so that the first end 210 is elastically connected to the container mouth 500 in a sealed manner.

[0039] The number of the connecting components 300 can be three, four, five, six or more. In the illustrated embodiment, the number of the connecting components 300 is six, and the first end 210 of the elastic sealing sleeve 200 can be acted on from six positions. The first end 210 is subjected to a relatively even and stable force as a whole, avoiding the situation where too few connecting components 300 lead to excessive concentration of force on the first end 210 and form a sharp corner, which affects durability. It also avoids too many connecting components 300 from gathering inside the device, effectively avoiding motion interference.

[0040] refer to Figure 2 In the natural state, the inner diameter of the port of the first end 210 of the elastic sealing sleeve 200 is smaller than the outer diameter of the container opening 500 of the container to be tested. Figure 3 After the first end 210 is opened, it is sleeved on the outer peripheral wall of the container mouth 500 of the container to be tested, and can be tightly attached to the outer peripheral wall of the container mouth 500 through elastic restoring force, thereby achieving a reliable sealing connection with the container mouth 500.

[0041] When used, the first end 210 of the elastic sealing sleeve 200 is used to connect the container to be tested, and the second end 220 is used to connect the connecting pipe in the air permeability testing equipment, thereby realizing the air permeability test of the container to be tested. Among them, by driving the outer turntable 110 to rotate the inner turntable 120 to drive the abutment member 320 to push the connecting member 310 to open the first end 210 of the elastic sealing sleeve 200, it can be set on the outer peripheral wall of the container mouth 500 of the container to be tested, and the first end 210 can be applied to container mouths 500 of different calibers due to elastic deformation. When in use, it is only necessary to rotate the outer turntable 110 to a certain extent when connecting, and open the first end 210 to be able to be set on the outside of the container mouth 500. After releasing the driving force of the outer turntable 110, the first end 210 of the elastic sealing sleeve 200 is compressed and wrapped on the outer peripheral wall of the container mouth 500 under the action of the elastic restoring force to achieve a sealed connection. The connection device adopts a mechanical structure, which is simple and easy to operate, has little influence from human factors, and is reliable in sealing. It is beneficial to ensure the sealing performance of the container sample, ensure the accuracy of the experimental data, and reduce human errors. Compared with the solution of using glue sealing, there is no need to wait for the glue to solidify, thereby saving manpower and time, and also helping to improve detection efficiency.

[0042] After the test is completed, similarly, the outer turntable 110 can be driven to rotate the inner turntable 120 to drive the abutment member 320 to push the connection member 310 to open the first end 210 of the elastic sealing sleeve 200, so that the connection with the container mouth 500 can be released. The assembly and disassembly are relatively convenient and can be reused. After the container that has been tested is removed, it can be used for the test of the next container, and it is compatible with container mouths 500 of different calibers, with strong versatility, and the connection device can be reused, which is conducive to reducing the waste of consumables.

[0043] The fixing part 130 can serve as an installation base for the inner turntable 120, the outer turntable 110 and the connecting part 310. The fixing part 130 can be a rotating shaft / sleeve having a through hole 131 for the elastic sealing sleeve 200 to pass through. The outer turntable 110 and the inner turntable 120 are rotatably connected to the fixing part 130 through center holes respectively. The center hole of the outer turntable 110 and the center hole of the inner turntable 120 are arranged sequentially in the axial direction, and the two do not interfere with each other.

[0044] refer to Figures 1 to 3In the connection device of the embodiment of the present application, the connection between the connecting member 310 and the fixing member 130 can be connected by a revolute pair, and the connection between the connecting member 310 and the first end 210 of the elastic sealing sleeve 200 can be connected by a fixed connection, for example, by adhesive connection, vulcanization connection, fixing nail fixed connection, etc. In some embodiments, the plane perpendicular to the axis is defined as the projection plane. On the projection plane, the connection position S1 of the connecting member 310 and the fixing member 130 surrounds the outer periphery of the connection position S2 of the first end 210 of the elastic sealing sleeve 200 and the connecting member 310. The abutment 320 and the connecting member 310 are arranged at an angle. Therefore, the movement of the abutment 320 generated by the rotation of the inner rotating disk 120 is transmitted to the connecting member 310 to form a swing relative to the connection position S1, and the swing of the connecting member 310 can be largely converted into the movement of the connection position S2, thereby smoothly opening the first end 210 of the elastic sealing sleeve 200.

[0045] Furthermore, the two ends of the abutment member 320 are respectively connected to the inner rotating disk 120 and the connecting member 310, and at least one end can be connected by a revolute pair. For example, a hinged portion 311 is provided between the two ends of the connecting member 310, and the abutment member 320 is hinged to the hinged portion 311. The hinged portion 311 is closer to the other end relative to the end of the connecting member 310 connected to the elastic sealing sleeve 200. The connecting member 310 can form a lever structure with the hinged portion 311 as a fulcrum. The abutment member 320 pushes the connecting member 310 to convert a relatively small swing into a relatively large movement of the connection position S2, so that the first end 210 of the elastic sealing sleeve 200 opens a relatively large opening, which is convenient for smooth sleeve connection on the outer peripheral wall of the container mouth 500.

[0046] The abutment member 320 and the connection member 310 may be rod-shaped structures, and may be made of hard materials such as metal, plastic, etc. The length of the abutment member 320 may be less than the length of the connection member 310, thereby saving internal space, avoiding motion interference, and forming a compact structure.

[0047] The outer turntable 110 can drive the inner turntable 120 to rotate in a variety of ways. The two can be fixedly connected, or the outer turntable 110 drives the inner turntable 120 to be connected through a transmission structure. For example, Figure 2 and Figure 3 The outer turntable 110 is provided with a first inner gear ring 111, and the inner turntable 120 is provided with a first outer gear ring 121 meshing with the first inner gear ring 111. The outer turntable 110 meshes with the first outer gear ring 121 on the inner turntable 120 through the first inner gear ring 111, thereby realizing the transmission of rotation. This transmission structure does not require other connecting parts 310, has a simpler and more compact structure, and the transmission method is stable and reliable, and easy to operate.

[0048] refer to Figure 2 and Figure 3In some embodiments of the connecting device, the connecting device may also include an adjusting member 400, which includes an adjusting rod 410 and a knob 420. One end of the adjusting rod 410 is rotatably connected to the fixing member 130, and the other end extends along the axial direction and is connected to the knob 420. The outer peripheral wall of the adjusting rod 410 is provided with a second outer gear ring 411, and the inner wall of the center hole of the outer turntable 110 is provided with a second inner gear ring 112. The second outer gear ring 411 of the adjusting rod 410 is meshed with the second inner gear ring 112 of the outer turntable 110. In the scheme where the fixing member 130 is a rotating shaft / sleeve having a through hole 131 for the elastic sealing sleeve 200 to pass through, and the outer rotating disk 110 and the inner rotating disk 120 are respectively rotatably connected to the fixing member 130 through the center hole, the center hole of the outer rotating disk 110 includes a first part 113 and a second part 114 along the axial direction, the inner wall of the first part 113 is connected to the fixing member 130, and the second inner gear ring 112 is provided in the second part 114, which is used to mesh with the second outer gear ring 411 of the adjusting rod 410. Thus, the outer rotating disk 110 can be driven to rotate by manually rotating the knob 420, and the motion transmission from the knob 420 to the adjusting rod 410, the outer rotating disk 110, the inner rotating disk 120, the abutment member 320, the connecting member 310, and the elastic sealing sleeve 200 is sequentially transmitted, and the operation is convenient. Furthermore, a channel is provided inside the adjusting member 400, and the channel penetrates the adjusting rod 410 and the knob 420 along the axial direction. The second end 220 of the elastic sealing sleeve 200 is passed through the channel so as to be connected with the connecting pipe of the air permeability testing equipment.

[0049] In the scheme without the adjustment member 400, the outer turntable 110 can also be rotated manually. Of course, in some embodiments, the adjustment member 400 is provided to facilitate operation. For example, in the scheme where the outer diameter of the outer turntable 110 of the connecting device is relatively large and inconvenient for human hand holding and operation, the adjustment member 400 is provided, and the outer dimensions of the knob 420 can be configured to be smaller than the outer diameter of the turntable, and set to a size suitable for manual hand holding and operation, thereby facilitating the rotation operation.

[0050] According to an embodiment of the second aspect of the utility model, a permeability testing device comprises a connecting device of the embodiment of the first aspect, and a connecting pipe, wherein the connecting pipe is sealed and connected to the second end 220 of the elastic sealing sleeve 200 of the connecting device. The permeability testing device adopts the connecting device of the above embodiment, which can effectively solve the problem of difficult disassembly and assembly, and achieve reliable sealing, which is conducive to ensuring the sealing performance of the sample, ensuring the accuracy of the experimental data, and reducing manual errors. Compared with the solution of using glue sealing, there is no need to wait for the glue to solidify, thereby saving manpower and time, and also helping to improve the detection efficiency. In addition, not using glue (potting glue) can save the consumption of consumables, and there is no release of harmful substances from glue to the detection environment. It is relatively more green and environmentally friendly, and the connecting device can be reused, which is conducive to reducing costs.

[0051] The embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A connection device, applied to a gas permeability testing device, used to connect a container to be tested, characterized in that: include: A rotating assembly comprises a fixing member, an outer rotating disk and an inner rotating disk, wherein the outer rotating disk is sleeved on the outside of the inner rotating disk, and the outer rotating disk is driven by an external force to drive the inner rotating disk to rotate around an axis, and the outer rotating disk and the inner rotating disk are respectively rotatably connected to the fixing member, and the outer rotating disk, the inner rotating disk and the fixing member respectively have a central hole coaxial with the axis; An elastic sealing sleeve, made of elastic material and in a cylindrical structure, extending along the axial direction and arranged in the central hole, the elastic sealing sleeve having a first end and a second end, the second end extending from the central hole to the outside of the outer turntable and used for connecting a connecting pipe of an air permeability testing device; A plurality of connection components, the connection components are distributed circumferentially around the axis, each of the connection components comprises a connection member and an abutment member, one end of the connection member is connected to the first end, and the other end is connected to the fixing member, one end of the abutment member is connected between the two ends of the connection member, and the other end is connected to the inner rotating disk; The inner turntable is driven to rotate so as to drive the abutment member to push the connecting member to swing relative to the fixing member to drive the first end of the elastic sealing sleeve to elastically deform and open, and the first end is used to be sleeved on the outer peripheral wall of the container mouth of the container to be tested so that the first end is sealed and connected to the container mouth through elasticity.

2. The connection device according to claim 1, characterized in that: A plane perpendicular to the axis is defined as a projection plane, on which a connection position S1 between the connector and the fixing member surrounds the outer periphery of a connection position S2 between the first end of the elastic sealing sleeve and the connector, and an angle is formed between the abutment member and the connector.

3. The connection device according to claim 2, characterized in that: A hinged portion is provided between the two ends of the connecting member. The hinged portion is closer to the other end of the connecting member than the end connected to the elastic sealing sleeve. The abutting member is hinged to the hinged portion.

4. The connection device according to claim 2, characterized in that: The length of the abutment member is smaller than the length of the connection member.

5. The connection device according to claim 1, characterized in that: The outer rotating disk is provided with a first inner gear ring, and the inner rotating disk is provided with a first outer gear ring meshing with the first inner gear ring.

6. The connection device according to claim 1, characterized in that: When the elastic sealing sleeve is in a natural state, the inner diameter of the port of the first end is smaller than the outer diameter of the container opening of the container to be tested.

7. The connection device according to claim 1, characterized in that: The number of the connection components is six.

8. The connection device according to any one of claims 1 to 7, characterized in that: The connecting device also includes an adjusting member, which includes an adjusting rod and a knob. One end of the adjusting rod is rotatably connected to the fixing member, and the other end extends along the direction of the axis and is connected to the knob. The outer peripheral wall of the adjusting rod is provided with a second outer gear ring, and the inner wall of the center hole of the outer turntable is provided with a second inner gear ring. The second outer gear ring of the adjusting rod is meshed with the second inner gear ring of the outer turntable.

9. The connection device according to claim 8, characterized in that: A channel is provided inside the adjusting member, and the channel penetrates the adjusting rod and the knob along the axial direction, and the second end of the elastic sealing sleeve is penetrated through the channel.

10. Air permeability testing equipment, characterized in that, include: The connecting device according to any one of claims 1 to 9; And, a connecting pipe, wherein the connecting pipe is sealingly connected to the second end of the elastic sealing sleeve of the connecting device.

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