Underwater airtightness detection instrument for silicone rubber airway sealing element
An automated underwater airtightness testing instrument for silicone rubber airway seals, utilizing a PLC controller and adaptive plug assembly, has achieved efficient airtightness testing of silicone rubber airway seals. This solves the problem of time-consuming manual operation and improves testing efficiency and equipment applicability.
Patent Information
- Application Number
- CN202511736924.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-01-20
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing methods for testing the air tightness of silicone rubber airway seals rely on manual operation, which is cumbersome and time-consuming, making it difficult to meet the high-speed batch testing requirements of modern production lines.
An underwater airtightness testing instrument for silicone rubber airway seals was designed. It uses a PLC controller to synchronously control the lifting and inflation structures, combined with an adaptive plug assembly and a pressure sensor to achieve automated testing, reduce step-by-step operations, ensure accurate inflation pressure, and adapt to various specifications of silicone rubber tubes.
It shortens the single testing cycle, improves testing efficiency and data reliability, enhances the versatility and flexibility of the equipment, and meets the testing needs of mass production.
Smart Images
Figure CN121364042A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of industrial nondestructive testing, in particular to a silicon rubber material air passage sealing piece underwater air tightness detection instrument. BACKGROUND
[0002] The silicon rubber air passage sealing piece is widely used in the field of automobile fuel systems and other fields with extremely high sealing reliability requirements due to excellent temperature resistance, elasticity and sealing performance. The absolute sealing performance of the silicon rubber air passage sealing piece under water or pressure environment directly determines the operation safety and stability of downstream equipment. Therefore, air tightness detection of the silicon rubber air passage sealing piece before leaving the factory is a key link of quality control.
[0003] At present, the air tightness verification of the silicon rubber air passage sealing piece generally adopts an underwater bubble method. The core principle of the method is to block the air passage ports of the sealing piece, fill the inside with gas of a set pressure, immerse it in water, rely on manual naked eye observation of whether continuous bubbles are generated on the water surface, and judge whether the sealing piece has leakage. However, the existing detection process completely relies on manual operation, and manual work is required to complete multiple steps such as workpiece fixing, port blocking, manual inflation, underwater immersion, naked eye observation and workpiece fishing. The operation is complicated and time-consuming, and the single piece detection cycle is long, which makes it difficult to meet the high rhythm batch detection demand of modern production lines.
[0004] Therefore, the application provides a silicon rubber material air passage sealing piece underwater air tightness detection instrument to solve the above problems. SUMMARY
[0005] The application provides a silicon rubber material air passage sealing piece underwater air tightness detection instrument, which aims to solve the problems that the existing silicon rubber air passage sealing piece adopts the underwater bubble method for air tightness detection, which completely relies on manual operation, the process is complicated and time-consuming, the single piece detection cycle is long, and it is difficult to adapt to the high rhythm batch detection demand of modern production lines.
[0006] To achieve the above purpose, the application provides the following technical scheme: a silicon rubber material air passage sealing piece underwater air tightness detection instrument, comprising a base and a transparent detection bin for containing detection water fixedly installed on the base, the detection instrument further comprises a PLC controller, a sealing structure arranged at a position above the transparent detection bin for blocking all holes of the silicon rubber pipe, a lifting structure arranged on the base and connected with the sealing structure for making the sealed silicon rubber pipe descend into the transparent detection bin, an inflation structure arranged on the lifting structure for inflating when the sealed silicon rubber pipe descends, and a pressure sensor arranged on the lifting structure and the inflation structure respectively, the inflation structure and the lifting structure are connected with the output end of the PLC controller, and the pressure sensor is connected with the input end of the PLC controller. The sealing structure comprises an adaptive plug assembly arranged in a linear distribution on the lifting structure and used for plugging the side hole of the silicone rubber tube, and a plug block arranged at each end of the silicone rubber tube and used for plugging the through hole at each end of the silicone rubber tube; the lifting structure and the inflation structure are synchronously controlled by the PLC controller, the sealed silicone rubber tube is lowered to the transparent detection bin by the lifting structure, and the inflation structure is inflated synchronously, so that the step-by-step operation is reduced, the single detection cycle is shortened, the detection efficiency is improved compared with the traditional manual detection, the detection demand of batch production can be met, the detection pressure data are collected in real time by the pressure sensor and fed back to the PLC controller, the inflation pressure is stable and accurate, the detection efficiency and data reliability are improved, in addition, the adaptive plug assembly can be adjusted along the lifting structure and matched with the plug block of different sizes, and the sealing demand of silicone rubber tubes of various specifications can be met, and the versatility and flexibility of the equipment are improved.
[0007] Preferably, in order to provide a clear observation field of view for the detection process, the transparent detection bin is made of high-strength acrylic material; the transparent detection bin made of high-strength acrylic material has high transparency and structural stability, can neither block the line of sight nor bear the pressure of detection water and the impact of workpiece placement, so that the intuitive observation of leakage bubbles can be realized, the detection result can be quickly judged, the bin body is not easy to be damaged, and the service life of the equipment is prolonged.
[0008] Preferably, in order to facilitate the underwater detection of the sealed silicone rubber tube and the lifting after detection, the lifting structure comprises a fixed rod fixedly installed on the base corresponding to one side of the transparent detection bin, a fixed seat fixedly installed on the fixed rod and located above the transparent detection bin, a cylinder fixedly installed on the fixed seat and connected to the output end of the PLC controller, and a lifting frame fixedly connected to the piston rod of the cylinder and arranged at the bottom of the fixed seat; the piston rod of the cylinder is controlled to be extended and retracted by the PLC controller, so that the lifting frame fixedly connected to the piston rod can be smoothly moved along the fixed rod, so that the sealed silicone rubber tube can be lowered to the transparent detection bin for detection, and the silicone rubber tube after detection can be lifted, thereby simplifying the feeding and discharging process and eliminating the need for manual operation.
[0009] Preferably, in order to provide installation space and sliding adjustment path for the inflatable structure and the adaptive plug assembly, a through slot is formed in the lifting frame for the inflatable structure and the adaptive plug assembly to pass through, and the lifting frame is provided with a sliding groove at the top and bottom of the through slot for the inflatable structure and the adaptive plug assembly to slide, so that the inflatable structure and the adaptive plug assembly can be adjusted in the length direction of the through slot, thereby achieving flexible adjustment of the inflatable structure and the adaptive plug assembly, meeting the hole docking requirements of silicon rubber tubes of different lengths, and further improving the equipment adaptability.
[0010] Preferably, in order to inflate the silicon rubber tube after sealing, the inflatable structure comprises two sliding blocks one connected in the two sliding grooves respectively, an air nozzle fixedly installed between the two sliding blocks one and penetrating through the through slot for connecting with one side hole of the silicon rubber tube, an air pump fixedly installed on one side of the air cylinder and connected with the output end of the PLC controller, and a hose fixedly connected with the air pump and the air nozzle at both ends, wherein the pressure sensor is fixedly arranged on the air nozzle; the air pump is started by the PLC controller, and gas is delivered to the air nozzle through the hose, the air nozzle can be docked with the side hole of the silicon rubber tube for inflation, and the pressure data at the air nozzle can be collected in real time by the pressure sensor and fed back to the PLC controller, so as to adjust the working state of the air pump, thereby avoiding manual inflation, ensuring accurate and controllable inflation pressure, avoiding damage to the workpiece due to excessive pressure or affecting the detection accuracy due to insufficient pressure, and improving the reliability of the detection data.
[0011] Preferably, in order to achieve the plugging of the side hole of the silicon rubber tube, the adaptive plug assembly comprises two sliding blocks two connected in the two sliding grooves respectively, a fixed shaft fixedly installed between the two sliding blocks two and located in the through slot, a plug arranged at one end of the fixed shaft and penetrating through the through slot for plugging the other side hole of the silicon rubber tube, and an adjusting member arranged at the end of the fixed shaft away from the plug and connected with the plug for driving the plug to rotate and move axially, and the pressure sensor is fixedly arranged on the plug; the fixed shaft is adjusted in position along the sliding groove by the sliding block two, and the screw rod is driven to rotate by rotating the knob, thereby driving the plug to move axially and tighten to plug the side hole, which can adapt to the plugging of side holes of different positions and different diameters, and the plugging pressure can be monitored in real time by the pressure sensor, so as to avoid sealing failure or damage to the workpiece due to excessive tightness, and ensure the sealing reliability.
[0012] Preferably, in order to realize the axial movement adjustment of the plug, the adjusting member comprises a screw rod transversely penetrating through one end of the fixed shaft away from the slider and being rotationally connected in the fixed shaft, and a knob arranged outside the through slot and fixedly connected with the screw rod, and the screw rod is screwed with the plug at an end away from the knob; by rotating the knob to drive the screw rod to rotate, and by virtue of the screwing relationship between the screw rod and the plug, the rotational motion of the screw rod can be converted into the axial linear motion of the plug to realize the sealing depth adjustment, which is convenient to operate, can not only adapt to the sealing requirements of different aperture side holes to improve the flexibility of equipment use, but also reduce the complexity of manual operation.
[0013] Preferably, in order to further ensure the flexibility of equipment use, the plurality of plugs are provided, and the plurality of plugs are of different sizes; the design of the plurality of plugs of different sizes can select a plug of a corresponding size according to the pipe diameter of the silicone rubber pipe, and insert the plug into the through hole at the two ends of the silicone rubber pipe to realize tight sealing, so as to form a complete sealed cavity, so as to meet the sealing requirements of the two ends of the silicone rubber pipe of various specifications, and further improve the versatility and flexibility of the equipment.
[0014] The underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material synchronously controls the lifting structure and the inflation structure through the PLC controller, lowers the sealed silicone rubber pipe to the transparent detection bin by the lifting structure, and synchronously inflates the pipe by the inflation structure, so that the step-by-step operation can be reduced, the single detection cycle can be shortened, the efficiency can be improved compared with the traditional all manual detection, and the detection requirements of batch production can be met. The underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material collects detection pressure data in real time through the pressure sensor and feeds back to the PLC controller, so that the inflation pressure can be stable and accurate, and the detection efficiency and data reliability can be improved. The underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material is provided with the self-adaptive plug assembly, can be adjusted along the lifting structure and cooperate with plugs of different sizes, can be suitable for the sealing requirements of silicone rubber pipes of various specifications, and can improve the versatility and flexibility of the equipment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is an application structure schematic view of the underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material. Figure 2 It is a structure schematic view of the underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material. Figure 3 It is a structure schematic view of the lifting structure in the underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material. Figure 4 It is a structure schematic view of the inflation in the underwater air tightness detection instrument for the airway sealing piece of the silicone rubber material. Figure 5 It is Figure 4Enlarged structural schematic diagram at middle A; Figure 6 Structural schematic diagram of transparent detection bin in underwater air tightness detection instrument for airway sealing piece of silicone rubber material; Figure 7 Structural schematic diagram of cross section of lifting frame in underwater air tightness detection instrument for airway sealing piece of silicone rubber material; Figure 8 Exploded structural schematic diagram of self-adaptive plug assembly in underwater air tightness detection instrument for airway sealing piece of silicone rubber material.
[0016] In the figure: 1, base; 2, transparent detection bin; 3, lifting structure; 31, fixed rod; 32, fixed seat; 33, air cylinder; 34, lifting frame; 341, through slot; 342, sliding slot; 4, inflation structure; 41, sliding block one; 42, air nozzle; 43, air pump; 44, hose; 5, PLC controller; 6, sealing structure; 61, self-adaptive plug assembly; 611, fixed shaft; 612, sliding block two; 613, plug; 614, adjusting piece; 6141, screw rod; 6142, knob; 62, blocking block. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0018] The present embodiment provides an underwater air tightness detection instrument for airway sealing piece of silicone rubber material, which comprises a base, a transparent detection bin, a lifting structure, an inflation structure, a PLC controller, a sealing structure and a self-adaptive plug assembly. Figures 1-8As shown, the detection instrument includes a base 1 and a transparent detection bin 2 fixedly installed on the base 1 for containing detection water, and further includes a PLC controller 5, a sealing structure 6 arranged at a position above the transparent detection bin 2 for plugging all holes of the silicone rubber tube, a lifting structure 3 arranged on the base 1 and connected with the sealing structure 6 for lowering the sealed silicone rubber tube into the transparent detection bin 2, an inflation structure 4 arranged on the lifting structure 3 for inflating the silicone rubber tube when the silicone rubber tube is lowered, and pressure sensors arranged on the lifting structure 3 and the inflation structure 4 respectively, wherein the inflation structure 4 and the lifting structure 3 are connected with the output end of the PLC controller 5, and the pressure sensors are connected with the input end of the PLC controller 5; the sealing structure 6 includes a self-adaptive plug assembly 61 linearly arranged on the lifting structure 3 for plugging the side hole of the silicone rubber tube, and a plug 62 arranged at both ends of the silicone rubber tube for plugging the through hole at both ends of the silicone rubber tube.
[0019] In order to provide a clear observation field of view for the detection process, the transparent detection bin 2 is made of high-strength acrylic material; the transparent detection bin 2 made of high-strength acrylic material has high transparency and structural stability, can neither block the line of sight nor withstand the pressure of detection water and the impact of workpiece placement, so as to realize intuitive observation of leakage bubbles, facilitate rapid judgment of detection results, and the bin body is not easy to be damaged, prolonging the service life of the equipment.
[0020] In addition, in order to further ensure the flexibility of the equipment, the plug 62 is provided with a plurality of plugs 62 of different sizes; the design of the plurality of plugs 62 of different sizes can select the plug 62 of the corresponding size according to the pipe diameter of the silicone rubber tube, and insert it into the through hole at both ends of the silicone rubber tube to realize tight plugging, so as to form a complete sealed cavity, so as to meet the sealing requirements of the two ends of the silicone rubber tube of various specifications, and further improve the universality and flexibility of the equipment.
[0021] In use, first, according to the pipe diameter of the silicone rubber pipe to be detected, select the corresponding size of the plug 62, insert it into the through hole at both ends of the silicone rubber pipe to achieve both ends of the plug, and then through the sliding self-adaptive plug assembly 61 along the adjusting path of the lifting structure 3, cooperate with its own adjusting function to align the side hole of the silicone rubber pipe and complete the plugging, and the full hole sealing of the silicone rubber pipe can be realized through the sealing structure 6, then operate the PLC controller 5, issue instructions through the PLC controller 5, control the lifting structure 3 to drive the sealed silicone rubber pipe to stably descend into the transparent detection bin 2 containing detection water, at the same time, the PLC controller 5 will start the inflation structure 4 synchronously, and inflate the sealed silicone rubber pipe, in this process, the pressure sensor arranged on the lifting structure 3 and the inflation structure 4 collects the lifting pressure and inflation pressure data in real time and feeds back to the PLC controller 5, the PLC controller 5 adjusts the descending speed of the lifting structure 3 and the inflation pressure of the inflation structure 4 according to the feedback data, when the sealed silicone rubber pipe descends into the transparent detection bin 2 containing detection water, the operator observes whether the silicone rubber pipe produces a leakage bubble through the transparent detection bin 2, if there is a bubble, it is determined that the air tightness of the silicone rubber pipe is unqualified, if there is no bubble, it is determined to be qualified, the whole process realizes the cooperative work of the lifting structure 3 and the inflation structure 4 through the PLC controller 5, reduces the step-by-step operation, effectively shortens the single detection period, and completes the underwater air tightness detection of the silicone rubber pipe.
[0022] Specifically, the lifting structure 3 includes a fixed rod 31 fixedly installed on the base 1 corresponding to one side of the transparent detection bin 2, a fixed seat 32 fixedly installed on the fixed rod 31 and located above the transparent detection bin 2, a pneumatic cylinder 33 fixedly installed on the fixed seat 32 and connected with the output end of the PLC controller 5, and a lifting frame 34 arranged at the bottom of the fixed seat 32 and fixedly connected with the piston rod of the pneumatic cylinder 33. When the PLC controller 5 issues a lifting instruction, its output end transmits a signal to the pneumatic cylinder 33 to control the piston rod of the pneumatic cylinder 33 to perform extension and retraction movement, since the lifting frame 34 is arranged at the bottom of the fixed seat 32 and fixedly connected with the piston rod of the pneumatic cylinder 33, it will move stably along the extension direction of the fixed rod 31, and then drive the sealing structure 6, the inflation structure 4 and the sealed silicone rubber pipe installed on the lifting frame 34 to move synchronously, so that the silicone rubber pipe can be lowered into the transparent detection bin 2 for detection or lifted after detection.
[0023] It is worth mentioning that in order to provide installation space and sliding adjustment path for the inflatable structure 4 and the adaptive plug assembly 61, a through slot 341 is formed in the lifting frame 34 for the inflatable structure 4 and the adaptive plug assembly 61 to pass through, and the lifting frame 34 is provided with a sliding groove 342 at the top and bottom of the through slot 341 for the inflatable structure 4 and the adaptive plug assembly 61 to slide.
[0024] Further, the inflatable structure 4 includes two sliding blocks one 41 respectively slidingly connected in the two sliding grooves 342, an air nozzle 42 fixedly installed between the two sliding blocks one 41 and penetrating through the through slot 341 for connecting with one of the side holes of the silicone rubber tube, an air pump 43 fixedly installed on one side of the air cylinder 33 and connected with the output end of the PLC controller 5, and a hose 44 with two ends respectively fixedly connected with the air pump 43 and the air nozzle 42, wherein the pressure sensor is fixedly arranged on the air nozzle 42. Since the two sliding blocks one 41 are respectively slidingly connected in the two sliding grooves 342 of the lifting frame 34, the air nozzle 42 can be flexibly adjusted in the length direction of the through slot 341 to accurately connect with one of the side holes of the silicone rubber tube. When the PLC controller 5 issues an inflation instruction, the air pump 43 generates gas, which is stably delivered to the air nozzle 42 through the hose 44 with two ends respectively fixedly connected with the air pump 43 and the air nozzle 42, and then injected into the sealed silicone rubber tube. The pressure sensor fixedly arranged on the air nozzle 42 can collect pressure data in real time during the inflation process and feed back the data to the PLC controller 5. The PLC controller 5 can control the working state of the air pump 43 according to the feedback data to ensure accurate control of the inflation pressure and guarantee the accuracy of the airtightness detection.
[0025] Further, the self-adaptive plug assembly 61 comprises two sliders 612 respectively slidingly connected in the two sliding grooves 342, a fixed shaft 611 fixedly installed between the two sliders 612 and located in the through groove 341, a plug 613 provided at one end of the fixed shaft 611 and penetrating through the through groove 341 for plugging the other side hole of the silicone rubber tube, and an adjusting member 614 provided at the other end of the fixed shaft 611 away from the plug 613 and connected with the plug 613 for driving the plug 613 to be screwed and axially moved, and a pressure sensor is fixedly arranged on the plug 613; the adjusting member 614 comprises a screw rod 6141 transversely penetrating through the other end of the fixed shaft 611 away from the two sliders 612 and rotationally connected in the fixed shaft 611, and a knob 6142 arranged outside the through groove 341 and fixedly connected with the screw rod 6141, and the screw rod 6141 is screwed with the plug 613 at the end away from the knob 6142; Since the two sliders 612 are respectively slidingly connected in the two sliding grooves 342 of the lifting frame 34, the fixed shaft 611 fixedly installed between the two sliders 612 and located in the through groove 341 can be adjusted in the length direction of the through groove 341, and the plurality of plugs 613 are respectively located on both sides of the air nozzle 42, so that the plug 613 penetrating through the through groove 341 at one end of the fixed shaft 611 is aligned with the other side hole of the silicone rubber tube. Then, the operator holds the silicone rubber tube with one hand and rotates the knob 6142 arranged outside the through groove 341 with the other hand. Since the fixed shaft 611 is connected in the sliding groove 342 through the slider 612, the fixed shaft 611 will not move in the sliding groove 342 when the operator rotates the knob 6142 through the connection and limiting of the slider 612 and the sliding groove 342 and the effect of holding the silicone rubber tube. The screw rod 6141 is fixedly connected with the screw rod 6141 transversely penetrating through the other end of the fixed shaft 611 away from the two sliders 612 and screwed with the plug 613. Therefore, rotating the knob 6142 can drive the corresponding screw rod 6141 to rotate, and simultaneously convert the rotational motion of the corresponding screw rod 6141 into the axial linear motion of the plug 613, drive the plug 613 to be screwed and embedded in the side hole of the silicone rubber tube to complete the plugging, and the pressure sensor fixedly arranged on the plug 613 can collect the plugging pressure data in real time and feed back to the PLC controller 5, so that the operator can judge whether the plugging is reliable to ensure that the sealing effect meets the air tightness detection requirements.
[0026] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A device for detecting the water tightness of a silicone rubber airway seal underwater, comprising a base (1) and a transparent detection bin (2) fixedly installed on the base (1) for containing detection water, characterized in that: The detection instrument further comprises a PLC controller (5), a sealing structure (6) arranged above the transparent detection bin (2) and used for plugging the whole hole of the silicone rubber tube, a lifting structure (3) arranged on the base (1) and connected with the sealing structure (6) and used for lowering the sealed silicone rubber tube into the transparent detection bin (2), an inflation structure (4) arranged on the lifting structure (3) and used for inflating the silicone rubber tube when the silicone rubber tube is lowered, and a pressure sensor arranged on the lifting structure (3) and the inflation structure (4) respectively, wherein the inflation structure (4) and the lifting structure (3) are connected with the output end of the PLC controller (5), and the pressure sensor is connected with the input end of the PLC controller (5). The sealing structure (6) comprises a self-adaptive plug assembly (61) arranged linearly on the lifting structure (3) and used for plugging the side hole of the silicone rubber tube, and a plug block (62) arranged at both ends of the silicone rubber tube and used for plugging the through hole at both ends of the silicone rubber tube.
2. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 1, wherein: The transparent detection bin (2) is made of high-strength acrylic material.
3. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 1, wherein: The lifting structure (3) comprises a fixed rod (31) fixedly installed on the base (1) and corresponding to one side of the transparent detection bin (2), a fixed seat (32) fixedly installed on the fixed rod (31) and located at the position above the transparent detection bin (2), a pneumatic cylinder (33) fixedly installed on the fixed seat (32) and connected with the output end of the PLC controller (5), and a lifting frame (34) arranged at the bottom of the fixed seat (32) and fixedly connected with the piston rod of the pneumatic cylinder (33).
4. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 3, wherein: The lifting frame (34) is provided with a through groove (341) for the inflation structure (4) and the self-adaptive plug assembly (61) to pass through, and the lifting frame (34) is provided with a sliding groove (342) corresponding to the top and bottom of the through groove (341) and in communication with the through groove (341) for the inflation structure (4) and the self-adaptive plug assembly (61) to slide.
5. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 4, wherein: The inflation structure (4) comprises two sliding blocks (41) slidably connected in the two sliding grooves (342), an air nozzle (42) fixedly installed between the two sliding blocks (41) and penetrating through the through groove (341) and used for being connected with one of the side holes of the silicone rubber tube, an air pump (43) fixedly installed on one side of the pneumatic cylinder (33) and connected with the output end of the PLC controller (5), and a hose (44) fixedly connected with the air pump (43) and the air nozzle (42) at both ends, wherein the pressure sensor is fixedly arranged on the air nozzle (42).
6. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 5, wherein: The self-adapting plug assembly (61) comprises two sliding blocks (612) respectively slidingly connected in the two sliding grooves (342), a fixed shaft (611) fixedly installed between the two sliding blocks (612) and located in the through groove (341), a plug (613) provided at one end of the fixed shaft (611) and penetrating through the through groove (341) for plugging the other side hole of the silicone rubber tube, and an adjusting member (614) provided at the other end of the fixed shaft (611) away from the plug (613) and connected with the plug (613) for driving the plug (613) to rotate and axially move, and the pressure sensor is fixedly arranged on the plug (613).
7. The apparatus of claim 6, wherein: The adjusting member (614) comprises a screw rod (6141) transversely penetrating through the other end of the fixed shaft (611) away from the sliding block (612) and rotatingly connected in the fixed shaft (611), and a knob (6142) arranged outside the through groove (341) and fixedly connected with the screw rod (6141), and the screw rod (6141) is screwed with the plug (613) at the end away from the knob (6142).
8. The apparatus for detecting the water-tightness of a silicone airway seal underwater according to claim 1, wherein: The plurality of plugs (62) are different in size.