Air tightness detection device and equipment

Abstract

The embodiment of the utility model provides an air tightness detection device and equipment, and relates to the technical field of endoscope detection. The air tightness detection device comprises a detection box, a fixing assembly and an air inlet connector, the detection box is provided with an air inlet, a detection cavity and an air outlet, and the air inlet, the detection cavity and the air outlet are sequentially communicated; the fixing assembly is arranged at the air outlet and connected with the detection box, and the fixing assembly is used for fixing the near end of the insertion tube and communicating the near end of the insertion tube with the air outlet; the air inlet connector is arranged at the air inlet and connected with the detection box, and the air inlet connector is used for being connected with a leak detector, so that pressurized air applied by the leak detector sequentially passes through the air inlet, the detection cavity and the air outlet to be fed into the insertion pipe and the tip end. The air tightness detection device can perform air tightness detection on the endoscope and judge whether the tip is poor in sealing or not in advance, so that the production efficiency is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to endoscope detection technical field, specifically, relate to a kind of air-tightness detection device and equipment. BACKGROUND

[0002] The tip of endoscope refers to the tip portion of endoscope slender insertion tube, is also usually called tip. It is the key component of endoscope insertion human body interior to observe and diagnose, and the design and function of tip have important influence on the performance and use effect of endoscope. The tip of endoscope needs to be bonded using glue during manufacturing process, to fix relevant components, and ensure sealing.

[0003] However, in the process of bonding, improper operation can occur, leading to poor sealing of the tip. This adverse condition is difficult to identify in advance by the human eye, and can only be discovered at the semi-finished product stage or during subsequent use. At this time, the entire endoscope needs to be disassembled for repair, affecting production efficiency and increasing production costs. SUMMARY

[0004] The utility model aims at providing a kind of air-tightness detection device and equipment, which can detect the air-tightness of endoscope, judge whether the tip exists the situation of poor sealing in advance, improve production efficiency, and reduce production cost.

[0005] The embodiment of the utility model is implemented as follows:

[0006] In a first aspect, the utility model provides an air-tightness detection device for detecting the air-tightness of an endoscope. The endoscope includes an insertion tube and a tip, and the tip is arranged at the distal end of the insertion tube. The air-tightness detection device includes:

[0007] A detection box has an air inlet, a detection cavity and an air outlet, which are connected in sequence.

[0008] A fixing assembly is arranged at the air outlet and connected with the detection box. The fixing assembly is used to fix the proximal end of the insertion tube and connect the proximal end of the insertion tube with the air outlet.

[0009] An air inlet connector is arranged at the air inlet and connected with the detection box. The air inlet connector is used to connect with a leak detector, so that the pressurized gas applied by the leak detector is sent into the insertion tube and the tip through the air inlet, the detection cavity and the air outlet in sequence.

[0010] In an optional implementation, the fixing assembly comprises a fixing sleeve and a fastener, the fixing sleeve is arranged at the air outlet and connected with the detection box, the fixing sleeve is used for sleeving the proximal end of the insertion pipe and connecting the proximal end of the insertion pipe with the air outlet, and the fastener is arranged at the side of the fixing sleeve away from the air outlet and used for connecting and fixing the proximal end of the insertion pipe with the fixing sleeve.

[0011] In an optional implementation, the air tightness detection device further comprises a first connecting flange arranged at the air outlet, and the fixing assembly further comprises a second connecting flange arranged at the side of the fixing sleeve away from the fastener and connected with the first connecting flange.

[0012] In an optional implementation, the air tightness detection device further comprises a first sealing ring arranged between the first connecting flange and the second connecting flange and abutting against the first connecting flange and the second connecting flange at the same time, and the size of the first sealing ring is greater than the size of the air outlet.

[0013] In an optional implementation, the air tightness detection device further comprises a second sealing ring arranged at the inner side wall of the fixing sleeve and used for sleeving the proximal end of the insertion pipe.

[0014] In an optional implementation, the detection box comprises an upper cover and a lower shell, the upper cover is connected with the lower shell, and the detection cavity is formed between the upper cover and the lower shell, the upper cover is provided with the air inlet, and the lower shell is provided with the air outlet.

[0015] In an optional implementation, the air tightness detection device further comprises a plurality of screw handles, the plurality of screw handles are all arranged through the upper cover and all threadedly connected with the lower shell, and / or,

[0016] One of the upper cover and the lower shell is provided with a positioning hole, and the other is provided with a positioning pin corresponding to the positioning hole.

[0017] In an optional implementation, the air tightness detection device further comprises a third sealing ring arranged around the periphery of the lower shell and / or the upper cover and located at the side of the lower shell close to the upper cover, and the third sealing ring abuts against the upper cover and the lower shell at the same time.

[0018] In an optional implementation, the upper cover is further provided with a transparent window, and / or,

[0019] The airtightness detection device further comprises a fixed handle, which is arranged on the upper cover.

[0020] In a second aspect, the utility model provides a kind of airtightness detection equipment, including leak detector and the airtightness detection device of any one of preceding embodiment, the leak detector is connected with the gas inlet connector.

[0021] The beneficial effects of the embodiments of the utility model include:

[0022] The airtightness detection device includes a detection box, a fixing assembly, and a gas inlet connector. The detection box has a gas inlet, a detection cavity, and a gas outlet, which are sequentially connected. The fixing assembly is arranged at the gas outlet and connected with the detection box. The fixing assembly is used to fix the proximal end of the insertion tube and connect the proximal end of the insertion tube with the gas outlet. The gas inlet connector is arranged at the gas inlet and connected with the detection box. The gas inlet connector is used to connect with the leak detector to send the gas with pressure applied by the leak detector into the insertion tube and the tip through the gas inlet, the detection cavity, and the gas outlet in sequence.

[0023] When detecting the airtightness of the endoscope, the insertion tube of the endoscope can be sequentially passed through the detection cavity and the gas outlet, and then passed out of the fixing assembly. The proximal end of the insertion tube is then fixed by the fixing assembly, and the tip at the distal end of the insertion tube is then immersed in water. Then, the gas inlet connector is connected with the leak detector, and the gas with certain pressure is applied into the detection cavity by the leak detector. The gas sequentially enters the insertion tube and the tip through the gas outlet. In this way, by observing the condition of the tip in the water, it can be determined whether there is a poor sealing condition. That is, by using the airtightness detection device, the airtightness of the tip can be detected in advance before testing at the endoscope semi-finished product stage, to determine whether there is a poor sealing condition, thereby improving the production efficiency and reducing the production cost.

[0024] The airtightness detection equipment includes the airtightness detection device, which has all the beneficial effects of the airtightness detection device. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The airtightness detection device provided by the embodiments of the utility model and the assembly diagram of the endoscope are shown in the following figure:

[0027] Figure 2The structure schematic diagram of the air tightness detection device provided by the embodiment of the utility model;

[0028] Figure 3 The explosion view of the air tightness detection device provided by the embodiment of the utility model;

[0029] Figure 4 The partial structure section view of the air tightness detection device and the endoscope provided by the embodiment of the utility model;

[0030] Figure 5 The structure schematic diagram of the fixing assembly provided by the embodiment of the utility model.

[0031] Icon: 100-air tightness detection device;10-detection box;11-air inlet;12-detection cavity;13-air outlet;14-upper cover;141-positioning hole;142-transparent window;15-lower shell;151-positioning pin;152-second annular groove;20-fixing assembly;21-fixing shaft sleeve;22-fastener;23-second connecting flange;231-first annular groove;30-air inlet connector;40-first connecting flange;51-first sealing ring;52-second sealing ring;53-third sealing ring;60-screw handle;70-fixing handle;200-endoscope;201-insertion tube;2011-rotary copper sleeve;202-tips;203-wire harness. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the utility model.

[0034] It should be noted that: similar signs and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, or is the orientation or position relation commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0036] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "setting", "mounting", "connecting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] As described in the background, the tip of the endoscope needs to be bonded with glue during the manufacturing process to fix the related components and ensure the sealing. However, improper operation may occur during the bonding process, resulting in poor sealing of the tip. This poor condition is difficult to identify in advance by the human eye and can only be discovered at the semi-finished product stage or during subsequent use. At this time, the entire endoscope needs to be disassembled for repair, affecting production efficiency and increasing production costs.

[0039] Based on this, please refer to Figures 1-5 The embodiments of the utility model provide a gas tightness detection device 100 and equipment, which can effectively improve the above-mentioned technical problems, that is, it can detect the gas tightness of the endoscope 200, judge whether the tip 202 has a poor sealing condition in advance, improve the production efficiency, and reduce the production cost. The gas tightness detection device 100 and equipment will be described in detail below.

[0040] The air tightness detection device comprises an air tightness detection apparatus 100 and a leak detector. The air tightness detection apparatus 100 is used to assemble with the endoscope 200 to detect the air tightness of the endoscope 200. The leak detector is connected with the air tightness detection apparatus 100 to apply the pressurized gas to the air tightness detection apparatus 100, so as to send the gas into the endoscope 200 to determine the sealing effect of the endoscope 200.

[0041] It should be noted that the air tightness detection apparatus 100 and the air tightness detection device are not limited to detecting the air tightness of the endoscope 200, but also can detect the air tightness of other pipeline structures.

[0042] Please refer to Figures 1-3 , Figure 1 The assembly schematic diagram of the air tightness detection apparatus 100 and the endoscope 200 provided in the embodiment, Figure 2 The structural schematic diagram of the air tightness detection apparatus 100 provided in the embodiment, Figure 3 The exploded view of the air tightness detection apparatus 100 provided in the embodiment, combined with Figures 1-3 The endoscope 200 comprises an insertion tube 201 and a tip 202. The tip 202 is arranged at the distal end of the insertion tube 201. The air tightness detection apparatus 100 comprises a detection box 10, a fixing assembly 20 and an air inlet joint 30. The detection box 10 has an air inlet 11, a detection cavity 12 and an air outlet 13, which are sequentially communicated. The fixing assembly 20 is arranged at the air outlet 13 and connected with the detection box 10. The fixing assembly 20 is used to fix the proximal end of the insertion tube 201 and make the proximal end of the insertion tube 201 communicated with the air outlet 13. The air inlet joint 30 is arranged at the air inlet 11 and connected with the detection box 10. The air inlet joint 30 is used to connect with the leak detector to send the pressurized gas applied by the leak detector into the insertion tube 201 and the tip 202 through the air inlet 11, the detection cavity 12 and the air outlet 13 in sequence.

[0043] When the endoscope 200 is subjected to the air tightness detection, the insertion tube 201 of the endoscope 200 can be sequentially passed through the detection cavity 12, the gas outlet 13, and the fixed assembly 20, and then the proximal end of the insertion tube 201 is fixed by the fixed assembly 20, and then the tip head 202 at the distal end of the insertion tube 201 is immersed in water; then the gas inlet joint 30 is connected with the leak detector, and the gas with a certain pressure is applied to the detection cavity 12 through the leak detector, and the gas sequentially enters the insertion tube 201 and the tip head 202 through the gas outlet 13, so that whether there is a poor sealing condition can be judged by observing the situation of the tip head 202 in the water. That is, using the air tightness detection device 100, the tip head 202 can be subjected to air tightness detection in advance before the endoscope 200 is tested in the semi-finished product stage, so as to judge whether there is a poor sealing condition, thereby improving the production efficiency and reducing the production cost.

[0044] Please refer to Figure 4 , Figure 4 The air tightness detection device 100 provided for the embodiment and the partial structure sectional view of the endoscope 200 are combined with Figure 1 and Figure 4 The endoscope 200 further includes a wire harness 203 extending from the proximal end of the insertion tube 201. When the tip head 202 of the endoscope 200 is subjected to air tightness detection, the insertion tube 201 is passed out of the fixed assembly 20, and then the wire harness 203 can be arranged in the detection cavity 12, so as to avoid the wire harness 203 affecting the detection result and improve the accuracy of the detection.

[0045] Combined with Figures 1-4 Specifically, the fixed assembly 20 includes a fixed shaft sleeve 21 and a fastener 22. The fixed shaft sleeve 21 is arranged at the gas outlet 13 and connected with the detection box 10. The fixed shaft sleeve 21 is used for sleeving the proximal end of the insertion tube 201 and connecting the proximal end of the insertion tube 201 with the gas outlet 13. The fastener 22 is arranged at the side of the fixed shaft sleeve 21 away from the gas outlet 13, and the fastener 22 is used for connecting and fixing the proximal end of the insertion tube 201 with the fixed shaft sleeve 21. It is easy to understand that after the insertion tube 201 passes through the fixed shaft sleeve 21, the insertion tube 201 is connected and fixed with the fixed shaft sleeve 21 by the fastener 22, so as to reduce the shaking condition when the subsequent gas with pressure passes through, thereby improving the stability in the air tightness detection process.

[0046] It should be noted that in the embodiment, the fastener 22 is specifically a fixing nut, the proximal end of the insertion tube 201 is provided with a rotating copper sleeve 2011, the rotating copper sleeve 2011 is in communication with the gas outlet 13, the fixing shaft sleeve 21 is sleeved on the rotating copper sleeve 2011, the fixing nut is sleeved on the rotating copper sleeve 2011 and is in threaded connection with the rotating copper sleeve 2011. That is to say, by screwing the fixing nut or rotating the copper sleeve 2011, the proximal end of the insertion tube 201 can be fixed on the fixing shaft sleeve 21.

[0047] Please refer to Figure 3 and Figure 4 , in order to facilitate the connection of the fixing shaft sleeve 21 and the detection box 10, the air tightness detection device 100 further comprises a first connecting flange 40, the first connecting flange 40 is arranged on the gas outlet 13; the fixing assembly 20 further comprises a second connecting flange 23, the second connecting flange 23 is arranged on the side of the fixing shaft sleeve 21 away from the fastener 22, and the second connecting flange 23 is connected with the first connecting flange 40.

[0048] Further, in order to improve the sealing performance of the first connecting flange 40 and the second connecting flange 23 after being connected, the air tightness detection device 100 further comprises a first sealing ring 51, the first sealing ring 51 is arranged between the first connecting flange 40 and the second connecting flange 23, and simultaneously abuts against the first connecting flange 40 and the second connecting flange 23; the size of the first sealing ring 51 is greater than the size of the gas outlet 13.

[0049] Please refer to Figure 5 , Figure 5 for the structural schematic view of the fixing assembly 20 provided in the embodiment, in combination with Figure 3 and Figure 5 , in order to facilitate the installation of the first sealing ring 51, the side of the second connecting flange 23 close to the first connecting flange 40 is provided with a first annular groove 231, and the first sealing ring 51 is arranged in the first annular groove 231.

[0050] Further, in order to improve the sealing performance between the fixing shaft sleeve 21 and the proximal end of the insertion tube 201, the air tightness detection device 100 further comprises a second sealing ring 52, the second sealing ring 52 is arranged on the inner side wall of the fixing shaft sleeve 21, and the second sealing ring 52 is used for sleeving the proximal end of the insertion tube 201.

[0051] Please refer to Figure 2 and Figure 3 , specifically, the detection box 10 comprises an upper cover 14 and a lower shell 15, the upper cover 14 is connected with the lower shell 15, and a detection cavity 12 is formed between the upper cover 14 and the lower shell 15; the upper cover 14 is provided with an air inlet 11, and the lower shell 15 is provided with a gas outlet 13.

[0052] Optionally, the upper cover 14 and the lower shell 15 are detachably connected, which can facilitate installation and disassembly. Of course, the upper cover 14 and the lower shell 15 can also be connected and fixed by welding or the like.

[0053] In particular, in the embodiment, the air tightness detection device 100 further comprises a plurality of screw handles 60, the plurality of screw handles 60 are all arranged in the upper cover 14, and are all in threaded connection with the lower shell 15. It is easy to understand that through the arrangement of the plurality of screw handles 60, the upper cover 14 and the lower shell 15 can be connected and fixed at a plurality of different positions at the same time, and the screw handle 60 can also facilitate the operator to install and disassemble, thereby improving the assembly efficiency and also improving the detection efficiency.

[0054] In order to realize the positioning and installation of the upper cover 14 and the lower shell 15 and further improve the assembly efficiency, one of the upper cover 14 and the lower shell 15 is provided with a positioning hole 141, and the other is provided with a positioning pin 151, and the positioning pin 151 corresponds to the positioning hole 141.

[0055] It should be noted that in the embodiment, the upper cover 14 is provided with the positioning hole 141, the lower shell 15 is provided with the positioning pin 151, and the number of the positioning hole 141 and the positioning pin 151 is two and is diagonally arranged. Of course, in other embodiments, the upper cover 14 can be provided with the positioning pin 151, the lower shell 15 can be provided with the positioning hole 141, and the number of the positioning hole 141 and the positioning pin 151 can also be one, three, four or five, etc. In other embodiments, the positioning hole and the positioning pin can also be a positioning groove and a positioning protrusion and the like.

[0056] In combination with Figure 3 and Figure 4 , in order to improve the sealing between the upper cover 14 and the lower shell 15, the air tightness detection device 100 further comprises a third sealing ring 53, the third sealing ring 53 is arranged around the periphery of the lower shell 15 and / or the upper cover 14, and the third sealing ring 53 is in abutment with the upper cover 14 and the lower shell 15 at the same time.

[0057] It should be noted that in combination with the above-mentioned plurality of screw handles 60, in the case of being provided with the third sealing ring 53, different screw handles 60 can be rotated according to actual conditions, and the upper cover 14 is pressed in abutment on the third sealing ring 53, thereby improving the sealing effect of the entire detection box 10.

[0058] Similarly, in order to facilitate the installation of the third sealing ring 53, the lower shell 15 is provided with a second annular groove 152, and the third sealing ring 53 is arranged in the second annular groove 152.

[0059] Please continue to combine Figure 2 and Figure 3The upper cover 14 is further provided with a transparent window 142, through which the state in the detection cavity 12 can be observed, thereby ensuring the stability of the air tightness detection process.

[0060] Optionally, the transparent window 142 can be made of acrylic or glass, as long as the operator can conveniently observe the state in the detection box 10.

[0061] In addition, the air tightness detection device 100 further comprises a fixed handle 70, which is arranged on the upper cover 14, thereby facilitating the movement of the upper cover 14 and the assembly and fixation of the lower shell 15; of course, the air tightness detection device 100 can also be moved as a whole after assembly.

[0062] It should be noted that, in the embodiment, the number of the transparent windows 142 and the fixed handles 70 is two, of course, in other embodiments, the number of the transparent windows 142 can be one, three or four, etc., and the number of the fixed handles 70 can also be one, three or four, etc.

[0063] In summary, the embodiment of the utility model provides an air tightness detection device 100 and equipment, the air tightness detection device 100 includes detection box 10, fixed assembly 20 and inlet joint 30, detection box 10 has inlet 11, detection cavity 12 and outlet 13, inlet 11, detection cavity 12 and outlet 13 are sequentially communicated;Fixed assembly 20 is arranged in outlet 13, and is connected with detection box 10, and fixed assembly 20 is used for fixing the proximal end of insertion tube 201, and the proximal end of insertion tube 201 is communicated with outlet 13;Inlet joint 30 is arranged in inlet 11, and is connected with detection box 10, and inlet joint 30 is used for being connected with leak detector, to send the pressurized gas applied by leak detector, sequentially through inlet 11, detection cavity 12 and outlet 13, into insertion tube 201 and the proximal end 202.

[0064] It is easy to understand that when the endoscope 200 is subjected to the air tightness detection, the insertion tube 201 of the endoscope 200 can be sequentially passed through the detection cavity 12, the gas outlet 13 and the fixing assembly 20 in whole, and then the proximal end of the insertion tube 201 is fixed by the fixing assembly 20, and then the tip head 202 at the distal end of the insertion tube 201 is immersed in water; then the gas inlet joint 30 is connected with the leak detector, and the gas with a certain pressure is applied to the detection cavity 12 through the leak detector, and the gas sequentially enters the insertion tube 201 and the tip head 202 through the gas outlet 13, so that whether there is a poor sealing condition can be judged by observing the condition of the tip head 202 in the water. That is to say, by using the air tightness detection device 100, the air tightness detection of the tip head 202 can be performed in advance before the endoscope 200 is tested in the semi-finished product stage, whether there is a poor sealing condition can be judged, and therefore the production efficiency is improved and the production cost is reduced.

[0065] The air tightness detection device comprises the air tightness detection device 100, and has all the functions and beneficial effects of the air tightness detection device 100.

[0066] The above only describes specific embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An air tightness detecting device characterized by comprising: The utility model provides a gas tightness detection device for endoscope (200), the endoscope (200) includes insertion tube (201) and tip (202), the tip (202) is arranged at the distal end of insertion tube (201), and the gas tightness detection device (100) includes: Detection box (10), the detection box (10) has air inlet (11), detection cavity (12) and air outlet (13), air inlet (11), detection cavity (12) and air outlet (13) are communicated in proper order; Fixing assembly (20), the fixing assembly (20) is arranged in air outlet (13), and is connected with detection box (10), and the fixing assembly (20) is used for fixing the proximal end of insertion tube (201), and the proximal end of insertion tube (201) is communicated with air outlet (13);And Air inlet connector (30), the air inlet connector (30) is arranged in air inlet (11), and is connected with detection box (10), and the air inlet connector (30) is used for being connected with leak detector, to send the gas under pressure applied by leak detector, in proper order through air inlet (11), detection cavity (12) and air outlet (13), into insertion tube (201) and tip (202).

2. The air tightness testing apparatus of claim 1, wherein, The fixing assembly (20) includes fixing shaft sleeve (21) and fastener (22), the fixing shaft sleeve (21) is arranged in air outlet (13), and is connected with detection box (10), and the fixing shaft sleeve (21) is used for being set in the proximal end of insertion tube (201), and the proximal end of insertion tube (201) is communicated with air outlet (13);The fastener (22) is arranged in the side of fixing shaft sleeve (21) away from air outlet (13), and the fastener (22) is used for connecting and fixing the proximal end of insertion tube (201) with fixing shaft sleeve (21).

3. The air tightness testing apparatus of claim 2, wherein, The gas tightness detection device (100) further includes a first connecting flange (40), which is arranged in the air outlet (13);The fixing assembly (20) further includes a second connecting flange (23), which is arranged on the side of the fixing shaft sleeve (21) away from the fastener (22), and the second connecting flange (23) is connected with the first connecting flange (40).

4. The air tightness testing apparatus of claim 3, wherein, The gas tightness detection device (100) further includes a first sealing ring (51), which is arranged between the first connecting flange (40) and the second connecting flange (23), and simultaneously abuts against the first connecting flange (40) and the second connecting flange (23);The size of the first sealing ring (51) is greater than the size of the air outlet (13).

5. The air tightness testing apparatus of claim 2, wherein, The gas tightness detection device (100) further includes a second sealing ring (52), which is arranged on the inner side wall of the fixing shaft sleeve (21), and the second sealing ring (52) is used for being set on the proximal end of the insertion tube (201).

6. The air tightness testing apparatus of claim 1, wherein, The detection box (10) comprises an upper cover (14) and a lower shell (15), the upper cover (14) is connected with the lower shell (15), and the detection cavity (12) is formed between the upper cover (14) and the lower shell (15); the upper cover (14) is provided with the air inlet (11), and the lower shell (15) is provided with the air outlet (13).

7. The air tightness testing apparatus of claim 6, wherein, The air tightness detection device (100) further comprises a plurality of screw handles (60), the plurality of screw handles (60) are all arranged in the upper cover (14) and are all in threaded connection with the lower shell (15); and / or, One of the upper cover (14) and the lower shell (15) is provided with a positioning hole (141), and the other is provided with a positioning pin (151), the positioning pin (151) corresponds to the positioning hole (141).

8. The air tightness testing apparatus of claim 6, wherein, The air tightness detection device (100) further comprises a third sealing ring (53), the third sealing ring (53) is arranged around the periphery of the lower shell (15) and / or the upper cover (14), and the third sealing ring (53) is in abutment with the upper cover (14) and the lower shell (15) at the same time.

9. The air tightness testing apparatus of claim 6, wherein, The upper cover (14) is further provided with a transparent window (142); and / or, The air tightness detection device (100) further comprises a fixed handle (70), and the fixed handle (70) is arranged on the upper cover (14).

10. An air tightness testing apparatus characterized by, The air tightness detection device (100) is connected with the air inlet joint (30). The air tightness detection device (100) is connected with the air inlet joint (30).

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