Locking device and sealing performance testing system

Abstract

The utility model relates to the technical field of sealing performance testing, in particular to a locking device and a sealing performance testing system.The locking device comprises an adjusting part, a sleeve and a fixing part, and a guide channel is formed in the adjusting part; the sleeve is connected to the adjusting piece in a sleeving mode and provided with a clamping opening communicating with the guide channel. At least part of the fixing piece is connected to the outer portion of the connecting position of the input pipe and the output end of the atomization device in a surrounding and sleeving mode, and the two free ends of the fixing piece sequentially penetrate through the clamping opening and the guide channel and are arranged on the side, away from the sleeve, of the adjusting piece. Wherein the adjusting part and the sleeve can relatively move in the axial direction of the sleeve so as to adjust the opening diameter of the clamping opening and change the locking position of the clamping opening on the fixing part so as to lock the input pipe and the output end. The input pipe can be locked with the output ends of different sizes, the problem that the matching degree of the input pipe and different atomization devices in a traditional testing device is not high is solved, and the testing sealing performance and the accuracy of the measuring result are improved.

Description

Technical Field

[0001] This application relates to the field of sealing test technology, and more specifically to a locking device and a sealing test system. Background Technology

[0002] Atomizing devices heat a matrix into an aerosol using a non-combustible heating method. The aerosol is then passed through the nozzle of the atomizing device before being used by the user. During operation, the airtightness of the atomizing device significantly affects the amount of aerosol generated. To ensure the airtightness of the atomizing device, a suction aging test is required before it leaves the factory. During the test, the test device is connected to the atomizing device via the nozzle. Traditional test devices connect to the nozzle via a rubber conduit; however, due to the varying shapes and sizes of the nozzles, poor sealing often occurs during connection, affecting the test results. Utility Model Content

[0003] This application provides a locking device and a sealing test system, which allows the input tube of the airflow test device to be adapted to the output end of the atomizing device of different sizes, thereby improving the sealing performance of the atomizing device during testing and thus improving the accuracy of the test results.

[0004] This application provides a locking device for use with an airflow testing device and an atomizing device. The atomizing device includes an output end for outputting aerosols, and the airflow testing device includes an input tube sleeved outside the output end for receiving the aerosol generated by the atomizing device. The locking device includes an adjusting member, a sleeve, and a fixing member. The adjusting member has a guide channel inside. The sleeve is sleeved on the adjusting member and has a locking port communicating with the guide channel. At least a portion of the fixing member is sleeved around the connection between the input tube and the output end of the atomizing device. Two free ends of the fixing member pass sequentially through the locking port and the guide channel and are located on the side of the adjusting member away from the sleeve. The adjusting member and the sleeve are axially movable relative to each other to adjust the opening diameter of the locking port and change the locking position of the locking port on the fixing member, thereby locking the input tube and the output end.

[0005] In some optional embodiments, the sleeve includes a connecting sleeve portion and a locking portion, the locking portion including a plurality of elastic arms, the plurality of elastic arms being spaced apart circumferentially along the sleeve to form the locking opening; the plurality of elastic arms extending axially in the sleeve, and one end of the plurality of elastic arms being connected as an integral structure through the sleeve portion.

[0006] In some optional embodiments, the elastic arm comprises an extension section and a clamping section, the extension section is arranged between the clamping section and the sleeve joint, and extends along the axial direction of the sleeve; the clamping section extends along the axial direction of the sleeve and gradually shrinks towards the center of the sleeve.

[0007] In some optional embodiments, the adjusting member is provided with an abutting portion at one end close to the clamping opening, the abutting portion is movable along the inner wall of the clamping portion in the axial direction of the sleeve, so as to change the opening size of the clamping opening.

[0008] In some optional embodiments, the adjusting member further comprises a connecting portion connected with the abutting portion, the connecting portion is threadedly connected with the sleeve joint.

[0009] In some optional embodiments, the adjusting member further comprises an operating portion, the operating portion is arranged at one end of the connecting portion away from the abutting portion, the guide channel sequentially penetrates the abutting portion, the connecting portion and the operating portion along the axial direction of the sleeve, and the operating portion is used to drive the locking device to rotate, so that the two free ends of the fixing member are wound into a knot.

[0010] In some optional embodiments, the adjusting portion and the operating portion are perpendicular to each other.

[0011] In some optional embodiments, the locking device further comprises a clamping member, a first locking member and a second locking member, the clamping member is arranged at one side of the adjusting member away from the sleeve, the second locking member sequentially penetrates the operating portion and the clamping member from one side close to the sleeve to one side away from the sleeve, the first locking member is sleeved on the second locking member and arranged at one side of the clamping member away from the sleeve, and the first locking member is movable along the axial direction of the second locking member, so as to lock the two free ends of the fixing member between the first locking member and the clamping member.

[0012] In some optional embodiments, the locking device further comprises a third locking member, the third locking member is sleeved on the adjusting member and abuts against one end of the sleeve away from the clamping opening, so as to limit the movement of the sleeve.

[0013] The present application provides a sealing test system, which comprises an atomization device, an air flow test device and a locking device as described above, and the locking device is used to realize the sealed connection between the output end and the input pipe.

[0014] According to the locking device and the sealing test system in the embodiment, the locking device comprises a sleeve, an adjusting piece and a fixing piece. The fixing piece is used for sleeving on the input pipe and the output end of the atomization device, and can adapt to output ends of different sizes. The sleeve is sleeved on the adjusting piece. Since the adjusting piece and the sleeve can move relatively, the clamping opening can be expanded or contracted by the adjusting piece, and the locking position of the clamping opening on the fixing piece can also be changed, so as to realize the sealing connection of the input pipe and the output end, improve the sealing performance of the suction aging test, and improve the accuracy of the measurement result. The cooperation of the adjusting piece and the sleeve that move relatively and the fixing piece solves the problem that the matching degree of the input pipe and different atomization devices is not high in the traditional test device, not only increases the application range of the airflow test device, but also simplifies the structure, simplifies the operation steps and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a structural schematic view of the locking device in an embodiment;

[0016] Figure 2 FIG. 2 is a structural sectional view of the locking device in an embodiment;

[0017] Figure 3 FIG. 3 is a structural sectional view of the locking device in an embodiment in a use state;

[0018] Figure 4 FIG. 4 is a structural schematic view of the sleeve in an embodiment;

[0019] Figure 5 FIG. 5 is a structural schematic view of the sleeve in another angle in an embodiment;

[0020] Figure 6 FIG. 6 is a structural schematic view of the adjusting piece in an embodiment;

[0021] Figure 7 FIG. 7 is an exploded view of the locking device in an embodiment.

[0022] 1, the locking device; 100, the sleeve; 110, the clamping opening; 120, the sleeve joint; 130, the clamping part; 131, the elastic arm; 1311, the extension section; 1312, the clamping section; 200, the adjusting piece; 210, the guide channel; 220, the abutting portion; 230, the connecting portion; 240, the operating portion; 300, the fixing piece; 400, the clamping piece; 450, the first locking piece; 600, the second locking piece; 700, the third locking piece; 2, the input pipe; 3, the output end; A, the axis of the sleeve. DETAILED DESCRIPTION

[0023] The application will be described in further detail below with specific reference being made to the drawings. Like elements in different embodiments are denoted by like reference numerals. In the following description, numerous specific details are described to provide a thorough understanding of the application. However, it will be apparent to one skilled in the art that the application can be practiced without some or all of these specific details. In some instances, well known structures have not been described in detail in order to avoid unnecessarily obscuring the application. In addition, the description and drawings are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the protective scope of the present application.

[0024] In addition, the features, operations or steps described in the specification can be combined in any suitable manner in various embodiments, and the order of the steps involved in the various embodiments can be adjusted as can be apparent to those skilled in the art. Therefore, the specification and drawings are merely illustrative and are not to be taken in a restrictive sense.

[0025] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) unless otherwise specified.

[0026] The application provides a sealing test system, which comprises an atomization device and an airflow test device. The atomization device comprises an output end 3 for outputting aerosol. The airflow test device comprises an input pipe 2 sleeved outside the output end 3 for receiving the aerosol generated by the atomization device.

[0027] The atomization device is a device for heating an atomization substrate to generate aerosol for a user to use. The atomization device comprises an atomizer and a power supply assembly. The atomizer is provided with an atomization core assembly. The power supply assembly is used to supply power to the atomization core assembly. The atomization core assembly generates heat to heat the atomization substrate after being powered on. The output end 3 of the atomization device can be a mouthpiece. The user realizes the suction action through the mouthpiece. The aerosol enters the user's mouth (or nose) through the mouthpiece. In the test of sealing, the input pipe 2 is sleeved outside the mouthpiece, so that the aerosol discharged at the mouthpiece flows into the input pipe 2.

[0028] The term "aerosol" refers to a dispersion of solid or liquid particles in a gas. As used herein, "aerosol" can generally be used to refer to a substance that has been vaporized, atomized, in the form of a spray or jet, or otherwise converted from a solid or liquid form to an inhalable form that includes suspended solid or liquid drug particles.

[0029] As used herein, the term "atomizing substrate" refers to any suitable compound or mixture of compounds that facilitates aerosol formation in use, e.g., stable aerosol that is substantially resistant to thermal degradation at the operating temperature of the system. Suitable atomizing substrates are well known in the art and include, but are not limited to: polyhydric alcohols such as triethylene glycol, 1,3-butanediol, and glycerol; esters of polyhydric alcohols such as glycerol mono-, di-, or triacetate; and aliphatic esters of mono-, di-, or polybasic carboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. The atomizing substrate can include nicotine. The atomizing substrate can include water. The atomizing substrate can include glycerol (also known as glycerin), which has a higher boiling point than nicotine. The atomizing substrate can include propylene glycol. The atomizing substrate can include plant-based material. The atomizing substrate can include homogenized plant-based substrate material. The homogenized plant-based substrate material can contain volatile compounds. These compounds can be released from the atomizing substrate upon heating. The atomizing substrate is generally liquid in form and can be stored directly within the container or with the aid of a medium such as a wick.

[0030] It can be understood that the sealing performance of the atomizing device is crucial to its performance. On the one hand, a poor sealing performance of the atomizing device can cause the possibility of air leakage in the interior of the atomizing device, resulting in unstable airflow during use by the user, affecting the uniformity and consistency of the aerosol during the user's smoking process, affecting the taste of the aerosol and the resistance of the atomizing device, and thus affecting the user's smoking experience; on the other hand, a poor sealing performance can cause the risk of leakage of the atomizing substrate in the interior of the atomizing device, and the risk of leakage of the condensed liquid condensed from the aerosol into the atomizing device, corroding the structures including the power supply assembly, and thus damaging the atomizing device.

[0031] Therefore, when the atomizing device is shipped, its sealing performance needs to be strictly tested. Since the output end 3 (or the mouthpiece) of different models of atomizing devices has different shapes and sizes, different sizes of input tubes 2 need to be provided for different atomizing devices, which not only increases the testing cost but also reduces the testing efficiency. At the same time, the same model of atomizing device and input tube 2 can also have machining errors, etc., so that there is still a gap after the input tube 2 and the output end 3 are connected, and there is a risk of air leakage, resulting in that the measured particulate matter content is lower than the actual value, thereby affecting the measurement result of the total particulate matter (TPM) value, and ultimately affecting the accuracy of the test, so that the atomizing device that does not meet the standard is put into use, affecting the user's experience, or the atomizing device that meets the requirements is scrapped, affecting the yield and increasing the production cost.

[0032] In order to solve the above problems, the application provides a locking device 1 for locking an input pipe 2 and an output end 3, which helps to seal the connection between the input pipe 2 and the output end 3 of any size, so as to accurately measure the sealing performance of the atomizing device, improve the accuracy of the sealing test result, and the locking device 1 is simple in structure and convenient to operate.

[0033] Please refer to Figures 1 to 7 The locking device 1 comprises a sleeve 100, an adjusting part 200 and a fixing part 300. The adjusting part 200 has a guide channel 210 in the inside. The sleeve 100 is sleeved on the adjusting part 200, and the sleeve 100 is provided with a clamping opening 110 which is in communication with the guide channel 210. At least part of the fixing part 300 is sleeved around the outside of the connection between the input pipe 2 and the output end 3 of the atomizing device. The two free ends of the fixing part 300 pass through the clamping opening 110 and the guide channel 210 in sequence and are arranged on the side of the adjusting part 200 away from the sleeve 100. The adjusting part 200 and the sleeve 100 can move relatively in the axial direction of the sleeve 100 (the direction of the axis A, the same below) to adjust the caliber size of the clamping opening 110 and change the locking position of the clamping opening 110 on the fixing part 300, so as to lock the input pipe 2 and the output end 3.

[0034] Specifically, after the input pipe 2 is sleeved on the output end 3, the fixing part 300 is wound around the outside of the sleeving part of the input pipe 2 and the output end 3. After the adjusting part 200 or the sleeve 100 is driven to move relatively away in the axial direction of the sleeve 100, the caliber of the clamping opening 110 of the sleeve 100 is reduced. On the contrary, after the adjusting part 200 or the sleeve 100 is driven to move relatively close in the axial direction of the sleeve 100, the caliber of the clamping opening 110 of the sleeve 100 is expanded, so that the fixing part 300 of different sizes can pass through the clamping opening 110 and the guide channel 210 and be arranged on the side of the adjusting part 200 away from the sleeve 100, and the fixing part 300 can lock the input pipe 2 and the output end 3. Then, by driving the sleeve 100 to move close to the sleeving part of the input pipe 2 and the output end 3, the clamping opening 110 is moved to the locking position of the fixing part 300 and clamped.

[0035] Since the sleeve 100 and the adjusting part 200 can move relatively in the axial direction of the sleeve 100 (the movement direction is shown by the arrow in Figure 2 , the caliber of the clamping opening 110 can be adjusted to different sizes, so that the fixing part 300 of different sizes can pass in and be clamped and fixed at the locking position, and the assembly gap between the input pipe 2 and the output end 3 of different sizes can be eliminated under the locking action of the fixing part 300 after the two are connected, so that the gap between the input pipe 2 and the output end 3 does not cause air leakage, and finally the accuracy of the sealing test result of the atomizing device is improved.

[0036] In some embodiments, the fixing member 300 can be a flexible filament structure such as a steel wire, a nylon rope, an iron wire, etc. After the fixing member 300 is wrapped around the connection between the input pipe 2 and the output end 3, the two free ends of the fixing member 300 can be twisted into a knot under the action of rotation and compress the gap between the input pipe 2 and the output end 3 until it disappears. Specifically, taking the fixing member 300 as a nylon rope as an example, the nylon rope is wrapped around the connection between the input pipe 2 and the output end 3, and the two free ends of the nylon rope are inserted from the clamping port 110 and then extended to the side of the adjusting member 200 away from the sleeve 100 through the guide channel 210 and arranged on the adjusting member 200. Then, the rotation of the locking device 1 causes the two free ends of the nylon rope to be twisted into a hemp braid and form a tangle at the connection between the input pipe 2 and the output end 3. After moving the sleeve 100, the clamping port 110 is clamped outside the tangle, and the size of the clamping port 110 is adjusted so that the clamping port 110 can clamp the tangle, thereby avoiding the tangle from loosening and completing the locking of the connection between the input pipe 2 and the output end 3.

[0037] In some embodiments, the sleeve 100 includes a sleeve part 120 and a clamping part 130 connected and arranged. The clamping part 130 includes a plurality of elastic arms 131 arranged at intervals along the circumference of the sleeve to enclose the clamping port 110. The plurality of elastic arms 131 extend in the axial direction of the sleeve 100, and one end of the plurality of elastic arms 131 is connected as an integral structure through the sleeve part 120.

[0038] In some embodiments, the elastic arm 131 is provided in at least two. The at least two elastic arms 131 are symmetrically arranged. Optionally, the elastic arm 131 can be provided in a number of two, three, four, six or more. When the elastic arm 131 is provided in more than three, at least two elastic arms 131 are arranged opposite along the radial direction of the sleeve 100.

[0039] In some embodiments, the elastic arm 131 includes an extension segment 1311 and a clamping segment 1312. The extension segment 1311 is arranged between the clamping segment 1312 and the sleeve part 120 and extends in the axial direction of the sleeve 100. The clamping segment 1312 extends in the axial direction of the sleeve 100 and gradually shrinks towards the center of the sleeve 100 to form a tapered cavity inside the sleeve 100, which helps to adjust the caliber size of the clamping port 110.

[0040] In some embodiments, the adjusting member 200 is provided with an abutting portion 220 near one end of the clamping opening 110, which is capable of moving along the inner wall of the clamping portion 130 in the axial direction of the sleeve 100 to change the caliber of the clamping opening 110. Specifically, the abutting portion 220 is a cylindrical structure or a similar cylindrical structure, and the internal cavity of the sleeve 100 at the clamping portion 130 is a tapered structure. When the sleeve 100 and the adjusting member 200 are relatively close, the abutting portion 220 is capable of moving along the inner wall of the clamping portion 130 to the clamping opening 110, so that the elastic arms 131 are pressed and opened under the action of the abutting portion 220, thereby increasing the caliber of the clamping opening 110. When the sleeve 100 and the adjusting member 200 are relatively far away, the abutting portion 220 is capable of moving along the inner wall of the clamping portion 130 away from the clamping opening 110, and the pressing force applied by the abutting portion 220 to the elastic arms 131 gradually decreases or even disappears, so that the elastic arms 131 contract under the action of the elastic restoring force, thereby reducing the caliber of the clamping opening 110. The caliber of the clamping opening 110 changes, which not only facilitates the placement of the fixing member 300 of the appropriate size, but also locks the entanglement of the locking position of the fixing member 300 to effectively lock the input pipe 2 and the output pipe 3.

[0041] In some embodiments, the sleeve 100 is sleeved outside the adjusting member 200, and the relative movement between the sleeve 100 and the adjusting member 200 in the axial direction of the sleeve 100 can be achieved by rotating the adjusting member 200 or the sleeve 100. Specifically, the adjusting member 200 further comprises a connecting portion 230 connected with the abutting portion 220, and the connecting portion 230 is threadedly connected with the sleeve portion 120. In this embodiment, in order to reduce the resistance during the relative movement of the sleeve 100 and the adjusting member 200, the abutting portion 220 can not be provided with threads. In order to facilitate the rotation of the sleeve 100, an operation structure can be provided on the sleeve 100, which can be a column, a block or the like protruding from the outer wall of the sleeve 100, thereby providing an operation force point for the user.

[0042] In other embodiments, the sleeve 100 can also be sleeved outside the adjusting member 200 with a certain gap therebetween, so as to facilitate the direct pushing of the sleeve 100 or the adjusting member 200 in the axial direction of the sleeve 200, thereby achieving the relative approach or departure of the two. In this embodiment, a fixing structure needs to be provided to fix the adjusting member 200 and the sleeve 100 after they are moved into position, so as to avoid the relative movement of the two again and affect the locking effect.

[0043] In some embodiments, the adjusting member 200 further comprises an operation portion 240 provided at the end of the connecting portion 230 away from the abutting portion 220, and a guide channel 210 sequentially penetrates the abutting portion 220, the connecting portion 230 and the operation portion 240 in the axial direction of the sleeve 100. The operation portion 240 is used to drive the locking device 1 to rotate, so that the two free ends of the fixing member 300 are entangled into a knot.

[0044] In some embodiments, the operation part 240 and the connecting part 230 are perpendicular to each other. Specifically, the operation part 240 and the connecting part 230 form a "T" shape structure, so as to facilitate the force exertion.

[0045] In some embodiments, the locking device 1 further comprises a clamping piece 400, a first locking piece 500 and a second locking piece 600. The clamping piece 400 is arranged on the side of the adjusting piece 200 away from the sleeve 100. The second locking piece 600 passes through the operation part 240 and the clamping piece 400 from the side close to the sleeve 100 to the side away from the sleeve 100. The first locking piece 500 is sleeved on the second locking piece 600 and arranged on the side of the clamping piece 400 away from the sleeve 100. The first locking piece 500 can move along the axial direction of the second locking piece 600 to lock the two free ends of the fixing piece 300 between the first locking piece 500 and the clamping piece 400. Specifically, the clamping piece 400 and the adjusting piece 200 can be connected as a whole by the second locking piece 600. The clamping piece 400 can also move along the axial direction of the second locking piece 600 to facilitate the two free ends of the fixing piece 300 to be drawn out of the adjusting piece 200. After the two free ends are wound at least one turn around the second locking piece 600, the first locking piece 500 is moved close to the clamping piece 400, and then the two free ends of the fixing piece 300 are fixed between the clamping piece 400 and the first locking piece 500. Optionally, the first locking piece 500 can be a nut, and the second locking piece 600 can be a bolt or a screw.

[0046] In some embodiments, in order to facilitate the two free ends of the fixing piece 300 to pass out, the size of the outlet of the guide channel 210 in the operation part 240 can be increased. In order to facilitate the fixing of the clamping piece 400, the second locking piece 600 should be at least partially arranged in the operation part 240. In order to reduce the processing steps, the accommodation space of the second locking piece 600 and the guide channel 210 in the operation part 240 can be combined. Then the outlet of the guide channel 210 in the operation part 240 is designed as a rectangle, and the clamping piece 400 is also a rectangular plate structure. The clamping piece 400 is placed along the short side of the outlet, that is, the extension direction of the clamping piece 400 and the outlet are perpendicular to each other. This can not only fix the clamping piece 400, but also leave enough space for the free ends of the fixing piece 300 to pass out on both sides of the short side of the clamping piece 400.

[0047] In some embodiments, the locking device 1 further comprises a third locking member 700 sleeved on the adjusting member 200 and abutting against the end of the sleeve 100 away from the clamping opening 110, for limiting the movement of the sleeve 100. In use, after the sleeve 100 is moved into position, the clamping opening 110 on the sleeve 100 clamps the entanglement of the fixing member 300, in order to avoid the movement of the sleeve 100 causing the locking effect of the fixing member 300 to fail, the third locking member 700 is moved along the adjusting member 200, so that it is connected with the adjusting member 200 and abuts against the end of the sleeve 100, thereby avoiding the movement of the sleeve 100 away from the entanglement of the fixing member 300.

[0048] In some embodiments, the third locking member 700 can be a nut, which is threadedly connected with the adjusting member 200, for limiting the movement of the sleeve 100, avoiding the movement of the sleeve after being adjusted into position. Of course, in other embodiments, the third locking member 700 can also be a clamp, which is clamped outside the connection between the adjusting member 200 and the sleeve 100, for preventing the reverse movement of the sleeve 100 after being moved into position.

[0049] The above application of specific examples is used to illustrate the present application, which is only used to help understand the present application, and does not limit the present application. According to the idea of the present application, those skilled in the art can make several simple deductions, deformations or substitutions.

Claims

1. A locking device for use in conjunction with an airflow testing device and an atomizing device, the locking device comprising: The locking device comprises: an adjusting member, which has a guide channel inside; a sleeve, which is sleeved on the adjusting member and is provided with a clamping opening in communication with the guide channel; and a fixing member, which is at least partially sleeved outside the joint between the input pipe and the output end of the atomizing device, and two free ends of the fixing member pass through the clamping opening and the guide channel in sequence and are arranged on the side of the adjusting member away from the sleeve; wherein the adjusting member and the sleeve are relatively movable in the axial direction of the sleeve to adjust the opening size of the clamping opening and change the locking position of the clamping opening on the fixing member, so as to lock the input pipe and the output end.

2. The locking device of claim 1, wherein The sleeve comprises a sleeving part and a clamping part arranged in connection, the clamping part comprises a plurality of elastic arms arranged in the circumferential direction of the sleeve to form the clamping opening, the plurality of elastic arms extend in the axial direction of the sleeve, and one end of the plurality of elastic arms is connected as an integral structure through the sleeving part.

3. The locking device of claim 2, wherein The elastic arm comprises an extension segment and a clamping segment, the extension segment is arranged between the clamping segment and the sleeving part and extends in the axial direction of the sleeve, and the clamping segment extends in the axial direction of the sleeve and gradually shrinks towards the center of the sleeve.

4. The locking device of claim 2, wherein The end of the adjusting member close to the clamping opening is provided with an abutting part, which is movable along the inner wall of the clamping part in the axial direction of the sleeve to change the opening size of the clamping opening.

5. The locking device of claim 4, wherein, The adjusting member further comprises a connecting part connected with the abutting part, and the connecting part is threadedly connected with the sleeving part.

6. The locking device of claim 5, wherein, The adjusting member further comprises an operating part arranged at the end of the connecting part away from the abutting part, the guide channel passes through the abutting part, the connecting part and the operating part in sequence in the axial direction of the sleeve, and the operating part is used to drive the locking device to rotate so that the two free ends of the fixing member are intertwined into a knot.

7. The locking device of claim 6, wherein The operating part and the connecting part are perpendicular to each other.

8. The locking device of claim 6, wherein, The locking device further comprises a clamping member, a first locking member and a second locking member, the clamping member is arranged on the side of the adjusting member away from the sleeve, the second locking member passes through the operating part and the clamping member in sequence from the side close to the sleeve to the side away from the sleeve, the first locking member is sleeved on the second locking member and arranged on the side of the clamping member away from the sleeve, and the first locking member is movable in the axial direction of the second locking member to lock the two free ends of the fixing member between the first locking member and the clamping member.

9. The locking device according to any one of claims 1-8, characterized in that, The locking device further comprises a third locking member, which is sleeved on the adjusting member and abuts against the end of the sleeve away from the clamping opening, and is used to limit the movement of the sleeve.

10. A leak test system comprising an atomizing device, an airflow test device and a locking device as claimed in any one of claims 1-9 for effecting a sealed connection of the output end and the input tube.

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