Sealing performance detection device

Abstract

The utility model provides a sealing performance detection device, and belongs to the technical field of manufacturing equipment of medical consumables. The technical problem of false detection caused by incapability of accurately detecting the sealing performance in the prior art is solved. The air blowing driving piece drives the air blowing rod to move towards the detected object, the elastic piece provides extrusion force for the air blowing rod to abut against the detected object, detection air enters the detected object from the air inlet through the vent hole, and the air inlet is communicated with the air path opening and closing piece and the pressure sensor. The beneficial effects of the utility model lie in that under the condition that the sealing requirement is ensured, defective products are prevented from being detected as non-defective products due to the fact that air leakage points are compressed due to overlarge extrusion force.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing equipment for medical consumables, and in particular to a device for detecting the sealing performance of a product. Background Art

[0002] After the medical consumables are assembled, they need to be confirmed to be leak-free and tested during the production process. Especially the assembly of the infusion set is difficult to detect with the naked eye. It is generally inflated and then placed in water to observe whether bubbles are generated. This method is inefficient and not conducive to large-scale industrial production, and the random inspection method is not comprehensive enough. In addition, some existing automated sealing tests directly press the blowing rod and the infusion set to blow air. This method is too rough, the extrusion force is uncontrollable, and long-term operation can easily damage the connection. Small extrusion force and poor sealing of the connection will lead to unstable detection. Excessive extrusion force will cause the leakage point to be compressed, resulting in defective products being detected as good products. An efficient and stable sealing detection device is now needed. Summary of the invention

[0003] The purpose of the utility model is to solve the above problems in the prior art and propose a sealing detection device, which solves the technical problem that the prior detection technology cannot accurately detect the sealing and may cause false detection.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A sealing detection device comprises a transfer mechanism, a blowing mechanism, a clamping assembly, an air circuit opening and closing member and a pressure sensor, wherein the blowing mechanism and the clamping assembly are arranged on a frame on one side of the transfer mechanism, the clamping assembly is located between the transfer mechanism and the blowing mechanism, the clamping assembly is used to clamp the object to be detected transported by the transfer mechanism, the blowing mechanism comprises a pressing assembly, the pressing assembly comprises a blowing rod, a sliding seat, an elastic member and a blowing driving member, the blowing rod is slidably arranged on the sliding seat, the blowing driving member is drivingly connected to the blowing rod, and the blowing rod comprises an air inlet and an air vent;

[0006] Among them, the blowing drive drives the blowing rod to move toward the object to be detected, the elastic member provides extrusion force when the blowing rod is against the object to be detected, and the detection gas enters the interior of the object to be detected from the air inlet through the air vent, and the air inlet is connected to the air path opening and closing member and the pressure sensor. The present application adopts a relatively sliding setting of the blowing rod, and provides an extrusion thrust to the blowing rod through the elastic member, while ensuring the sealing requirements, the elastic impact reduces the damage to the entire detection device, and at the same time avoids the blowing drive directly pushing the blowing rod to move, avoids excessive extrusion force that causes the leakage point to be compressed and causes defective products to be detected as good products, and provides a technology for accurately detecting sealing.

[0007] In the above-mentioned sealing detection device, a sealing bevel is provided at one end of the blowing rod close to the clamping assembly, and the sealing bevel is adapted to the air inlet end of the object to be detected. The present application adopts the method of matching the sealing bevel with the air inlet end to expand the sealing surface, so that the connection between the blowing rod and the object to be detected is tighter.

[0008] In the above-mentioned sealing detection device, the blowing mechanism further includes a rotating drive assembly, the rotating drive assembly is fixedly arranged relative to the sliding seat, and the rotating drive assembly is drivingly connected to the blowing rod. The present application adopts a rotating drive assembly to drive the blowing rod and the object to be detected to rotate relative to each other so that the connection fits more tightly.

[0009] In the above-mentioned sealing detection device, the clamping assembly also includes a movable plate, the blowing drive is drivingly connected to the movable plate, the movable plate is movably arranged on the frame, the sliding seat and the rotating drive assembly are fixedly arranged on the movable plate, the rotating drive assembly is arranged on the side of the blowing rod away from the clamping assembly, and there are multiple blowing rods, and the multiple blowing rods are arranged on the movable plate along the conveying direction of the conveying mechanism. The present application adopts multiple blowing rods arranged on the movable plate, which increases the number of objects to be detected that can be processed at one time and improves the detection efficiency. At the same time, the blowing drive drives the movable plate to move, and moves the multiple blowing rods toward the object to be detected, thereby simplifying the driving structure of the blowing rod approaching the object to be detected.

[0010] In the above-mentioned sealing detection device, the blowing rod further includes a stopper, the elastic member is sleeved on the blowing rod and arranged between the stopper and the sliding seat, and the clamping assembly further includes a swivel bearing, the swivel bearing is sleeved on the blowing rod, and the swivel bearing is arranged between the elastic member and the stopper or between the elastic member and the sliding seat. The present application adopts the elastic member and the swivel bearing to cooperate to avoid friction between the blowing rod and the elastic member when rotating, thereby extending the life of the entire detection device.

[0011] In the above-mentioned sealing detection device, the sliding seat includes a rotating bearing and a sliding sleeve, there are at least two rotating bearings, the two ends of the sliding sleeve are arranged in the two rotating bearings, the blowing rod and the sliding sleeve can move axially and limit radially, the blowing rod also includes a stopper, the elastic member is sleeved on the blowing rod and arranged between the stopper and the sliding sleeve. The present application adopts the sliding sleeve, spring and blowing rod to rotate together, which simplifies the translation bearing.

[0012] In the above-mentioned sealing detection device, the rotation drive assembly includes a rotating member, a rotating guide seat and a rotating drive member, the rotating member is slidably arranged on the rotating guide seat, the rotating guide seat and the rotating drive member are fixedly arranged on the movable plate, a limiting groove is provided on the side of the rotating member close to the blowing rod, a limiting column matched with the limiting groove is fixedly provided on the blowing rod, a guide groove is provided on the rotating guide seat, a guide column matched with the guide groove is fixedly provided on the rotating member, and the elastic member is arranged between the blowing rod and the rotating member. The present application adopts the guide groove to limit the rotation angle of the blowing rod to avoid affecting the air path connected thereto due to excessive rotation of the blowing rod.

[0013] In the above-mentioned sealing detection device, the rotating drive assembly includes a push-gear cylinder, a main rotating gear, a rack, a synchronous gear, a slider and a guide rail. The push-gear cylinder and the slider are fixedly arranged on the moving plate. The push-gear cylinder is driven and connected to the guide rail. The guide rail is movably arranged on the slider. The rack is fixed below the guide rail. The main rotating gear matched with the rack is fixed on one of the blowing rods. Each blowing rod is provided with the synchronous gear, and multiple synchronous gears are in the same straight line. The present application adopts the cylinder to drive the gear rack transmission to reduce the number of rotating drive parts.

[0014] In the above-mentioned sealing detection device, the clamping assembly includes a clamping drive member 1, an upper clamping member, a clamping drive member 2, and a lower clamping member. The clamping drive member 1 is fixedly arranged on the frame and driven to be connected to the upper clamping member, the clamping drive member 2 is fixedly arranged on the frame and driven to be connected to the lower clamping member, the upper clamping member and the lower clamping member are driven to abut against each other for clamping the object to be detected, and the clamping assembly also includes a blocking member, the blocking member is fixedly connected to the frame, and at least the blocking member is movably connected to the lower clamping member. The present application adopts upper and lower clamping members to clamp the object to be detected more accurately. The present application adopts the method of clamping the object to be detected up and down to make the clamping process more stable, because the upper and lower clamping can allow a larger guide flaring, which helps to arrange the required position of the object to be detected before clamping it.

[0015] In the above-mentioned sealing detection device, the sealing detection device further includes a pressure regulating valve, the outlet of the gas circuit opening and closing member is connected to the gas inlet and the pressure sensor, and the inlet of the gas circuit opening and closing member is connected to the gas source through the pressure regulating valve. The present application adopts adding a pressure regulating valve between the gas circuit opening and closing member and the gas source to ensure the stability of the gas pressure each time it is detected.

[0016] In the above-mentioned sealing detection device, the sealing detection device also includes a sealing component, which is arranged on a frame on the side of the transfer mechanism away from the blowing mechanism, and the sealing component includes a sealing block, an abutment plate, a guide rod and a sealing drive member, and the sealing drive member is drivingly connected to the sealing block, the abutment plate and the guide rod are located between the sealing block and the transfer mechanism and are fixedly arranged on the frame, and the guide rod is located between the sealing block and the abutment plate.

[0017] In the above-mentioned sealing detection device, the sealing detection device also includes an aligning component, the aligning component is located above the blocking component and fixedly arranged on the frame, the aligning component includes an aligning lifting cylinder, a limiting air claw and a limiting component, the aligning lifting cylinder is driven and connected to the limiting air claw, the limiting component includes an aligning piece 1, an aligning piece 2, a connecting piece 1 and a connecting piece 2, the limiting air claw is driven and connected to the connecting piece 1 and the connecting piece 2, a plurality of the aligning pieces 1 are fixed to the connecting piece 1, and the same number of the aligning pieces 2 are fixed to the connecting piece 2, the aligning pieces 1 and the aligning pieces 2 are paired and driven by the limiting air claw to approach each other. The present application adopts an aligning piece to arrange the position of the object to be detected before blocking to ensure the reliability of the blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axial structural diagram of a sealing detection device of the utility model.

[0019] Figure 2 This is a side view of a sealing detection device of the utility model.

[0020] Figure 3 This is the axial structure diagram of the blowing mechanism and the clamping assembly in the utility model

[0021] Figure 4 This utility model Figure 3 Schematic cross-section of

[0022] Figure 5 This is a partial structural diagram of the clamping assembly in the utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the air blowing mechanism in the utility model.

[0024] Figure 7 This is a side view of the blowing mechanism in the utility model

[0025] Figure 8 This utility model Figure 4 Magnified view of area A in center

[0026] Fig. 9 This utility model Figure 7 Magnified view of area B

[0027] Fig.10 This is a schematic diagram of the structure of the blocking component and the tidying component in the utility model.

[0028] Fig.11 This is a schematic diagram of another embodiment of the rotary drive assembly in the utility model.

[0029] Fig.12 The utility model Fig.11 Schematic cross-section of

[0030] 11. Frame 1; 12. Frame 2; 13. Transfer mechanism;

[0031] 20. Blowing mechanism; 21. Blowing rod; 211. Stopper; 212. Limiting column; 213. Air inlet; 214. Air vent; 215. Sealing bevel; 22. Sliding seat; 221. Rotating bearing; 222. Sliding sleeve; 23. Blowing drive member; 24. Translation bearing; 25. Spring; 26. Moving plate; 261. Mounting plate 1; 262. Mounting plate 2; 263. Mounting plate 3; 27. Rotating member; 271. Limiting groove; 272. Guide column; 28. Rotating guide seat; 281. Guide groove; 29. ​​Rotating drive member;

[0032] 30. Clamping assembly; 31. Mounting frame 1; 32. Clamping drive member 1; 33. Upper clamping member; 331. Upper positioning groove; 332. Upper avoidance groove; 333. Upper pipe clamping groove; 334. Upper guide portion; 34. Lower clamping member; 341. Lower positioning groove; 342. Lower avoidance groove; 343. Lower pipe clamping groove; 344. Lower guide portion; 35. Mounting frame 2; 36. Clamping drive member 2; 37. Blocking member;

[0033] 40. Pressure regulating valve;

[0034] 50. Gas circuit opening and closing parts;

[0035] 60. Pressure sensor;

[0036] 70. Workbench;

[0037] 80. Blocking assembly; 81. Blocking drive member; 82. Blocking pressure block; 83. Abutment plate; 84. Guide rod;

[0038] 90. tidying component; 91. tidying lifting cylinder; 92. limit air claw; 93. limit assembly; 931. tidying piece 1; 932. tidying piece 2; 933. connecting piece 1; 934. connecting piece 2;

[0039] 100, infusion set; 101, connector; 1011, outer wall of interface; 102, catheter; 103, liquid medicine filter; 104, plastic needle; 105, air inlet pipe;

[0040] 111, main rotating gear; 112, rack; 113, gear-pushing cylinder; 114, synchronous gear; 115, slider; 116, guide rail; DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0042] like Figure 1 A sealing detection device shown in the figure includes a blowing mechanism 20, a clamping assembly 30, a pressure regulating valve 40, an air circuit opening and closing member 50 and a pressure sensor 60 arranged on a frame 11, and also includes a blocking assembly 80 and a tidying assembly 90 arranged on a frame 2 12. The blowing mechanism 20 includes a clamping assembly and a rotating drive assembly. The object to be detected in this embodiment is an infusion set 100, and the two ends of the infusion set 100 are respectively a plastic needle 104 and a connector 101. One end of the plastic needle 104 also has an air inlet pipe 105, and the air inlet pipe 105 is connected to the outside air. The plastic needle 104 has a sheath and is not connected to the outside air.

[0043] See also Figures 1 to 9After the infusion set 100 is transported to the sealing detection device by the transfer mechanism 13, the air inlet tube 105 at one end of the plastic needle 104 of the infusion set 100 is blocked by the blocking component 80 so that the gas inside the infusion set 100 cannot circulate to the outside. The blowing mechanism 20 is connected to the other end of the infusion set 100 to fill the infusion set 100 with gas. After the inflation is completed, the air inlet end is sealed. After a period of time, the change in the gas pressure inside the infusion set 100 or the pressure value is detected to determine whether the sealing of the infusion set 100 product is qualified. The specific action process is as follows: after the infusion set 100 is transported to the right place, the upper clamping member 33 and the lower clamping member 34 are driven to approach each other, clamping the end of the connector 101 away from the plastic needle 104, and one end of the connector 101 is clamped toward the blowing mechanism 20. The blowing rod 21 in the clamping assembly is pushed toward the infusion set 100 by the blowing driving member 23. After the blowing rod 21 contacts the connector 101, the rotating driving assembly drives the blowing rod 21 to rotate, so that the blowing rod 21 and the connector 101 are connected more tightly. In the process of the blowing rod 21 approaching the connector 101, the air inlet pipe 105 at one end of the plastic needle 104 is pressed by the blocking assembly 80, and the blocking pressing block 82 in the blocking assembly 80 presses the air inlet pipe 105 against the abutment plate 83 under the drive of the blocking driving member 81, thereby sealing the air inlet pipe 105 and the external gas flow channel. After the sealing action is completed at both ends, the air circuit opening and closing part 50 is started to fill the infusion set 100 with gas at a pressure higher than the atmospheric pressure, and the air circuit is closed after the inflation is completed according to the set time. A pressure sensor 60 is also connected to the closed air circuit, and the pressure sensor 60 can detect pressure changes or pressure values. Within a few seconds after the air circuit is closed, when the pressure in the closed air circuit drops by more than a preset value, the control system marks the infusion set 100 as a defective product based on the signal fed back by the pressure sensor 60, and these defective parts will be selected out in the waste rejection station downstream of the transfer mechanism 13.

[0044] The structure of each part is specifically described below according to the accompanying drawings.

[0045] See also Figure 1 , Figure 2 The blowing mechanism 20, the pressure regulating valve 40, the air circuit opening and closing member 50, and the pressure sensor 60 are all arranged on the workbench 70 and are installed on the frame 11 together with the clamping assembly 30. The frame 11 is arranged on one side of the transfer mechanism 13. The transfer mechanism 13 is further provided with a frame 2 12 on the side away from the frame 11, and a blocking assembly 80 and a tidying assembly 90 are fixed on the frame 2 12.

[0046] See also Figure 3 , Figure 4 , Figure 5The clamping assembly 30 is arranged on the side of the frame 11 close to the transfer mechanism 13. The clamping assembly 30 includes a mounting frame 131, a clamping drive member 132, an upper clamping member 33, a lower clamping member 34, a mounting frame 235 and a clamping drive member 236. The mounting frame 131 and the mounting frame 235 are both fixedly connected to the frame 11. The clamping drive member 132 is fixedly connected to the mounting frame 131, the clamping drive member 132 is drivingly connected to the upper clamping member 33, and the lower clamping member 34 is slidably connected to the mounting frame 235. The sliding connection structure can adopt a slide rail and a slider, or a guide rod and a linear bearing seat, or a guide groove sliding. A blocking member 37 is also arranged on the mounting frame 235. The blocking member 37 is located on the side of the lower clamping member 34 away from the blowing mechanism 20, such as Figure 3 The blocking member 37 is at least movably connected or detachably connected to the lower clamping member 34. The blocking member 37 can offset the thrust generated by the blowing mechanism 20 when the lower clamping member 34 abuts against the material, thereby preventing the sliding connection structure of the lower clamping member 34 from being deformed due to long-term lateral force. The corresponding blocking member 37 can also be further movably connected or detachably connected to the upper clamping member 33. The blocking member 37 has two blocking blocks, one of which is arranged on the mounting frame 2 35 and is located on the side of the lower clamping member 34 away from the blowing mechanism 20, and the other blocking block is arranged on the mounting frame 1 31 and is located on the side of the upper clamping member 33 away from the blowing mechanism 20. The clamping drive member 2 36 is fixedly connected to the frame 1 11 or the mounting frame 2 35, and can drive the lower clamping member 34 to move up and down. The upper clamping member 33 and the lower clamping member 34 are driven by the clamping driving member 1 32 and the clamping driving member 2 36 to approach each other, clamping the connector 101 and the catheter 102 at one end of the infusion set 100 .

[0047] For further information, see Figure 5The upper clamping member 33 further includes an upper positioning groove 331, an upper avoidance groove 332 and an upper pipe clamping groove 333, and the lower clamping member 34 further includes a lower positioning groove 341, a lower avoidance groove 342 and a lower pipe clamping groove 343. The upper positioning groove 331 and the lower positioning groove 341 are arranged opposite to each other, and the two positioning grooves are both located on the side of the two clamping members close to the blowing mechanism 20. The upper pipe clamping groove 333 and the lower pipe clamping groove 343 are arranged opposite to each other, and the two pipe clamping grooves are both located on the side of the two clamping members away from the blowing mechanism 20. The upper avoidance groove 332 is located between the upper positioning groove 331 and the upper pipe clamping groove 333, and the lower avoidance groove 342 is located between the lower positioning groove 341 and the lower pipe clamping groove 343. The upper and lower positioning grooves are used to clamp the connector 101, the upper and lower avoidance grooves are used to avoid the partial structure of the connector 101 or avoid the liquid medicine filter 103 connected to the connector 101, and the upper and lower clamping grooves are used to clamp the part of the catheter 102 connected to the connector 101, and the air inlet end of the clamped connector 101 faces the blowing mechanism 20. The upper clamping member 33 and the lower clamping member 34 are provided with a plurality of positioning grooves, avoidance grooves, and clamping grooves along the length direction, so that each time the two clamping members abut against each other, multiple infusion sets 100 can be clamped and positioned, thereby improving the production efficiency of the entire device. The upper clamping member 33 also includes an upper guide portion 334, and the lower clamping member 34 also includes a lower guide portion 344. The upper guide portion 334 and the lower guide portion 344 are close to each other, which can play a role in arranging the position of the connector 101 before clamping. The connector 101 is finally clamped by the upper positioning groove 331 and the lower positioning groove 341 along the inclined surface of the guide portion.

[0048] See also Figure 6 , Figure 7 The blowing mechanism 20 includes a clamping assembly and a rotating drive assembly. The clamping assembly includes a blowing rod 21, a movable plate 26 and a blowing drive 23, wherein the blowing rod 21 is arranged on the movable plate 26, and the movable plate 26 is movably arranged on the workbench 70. The blowing drive 23 is fixed to the workbench 70. The blowing drive 23 drives the movable plate 26 to move toward the clamping assembly 30, thereby driving the blowing rod 21 to approach the clamping assembly 30 and tightly connect with the joint 101. The moving setting of the movable plate 26 can adopt a combination of a slide rail and a slider or a combination of a guide rod and a linear bearing, and the blowing drive 23 can adopt a cylinder; or a slide cylinder can be used to replace the combination of the slide rail and the cylinder to directly drive the movable plate 26 to move through the slide cylinder. In order to reduce the impact force generated when the blowing drive 23 drives the blowing rod 21 to connect with the joint 101, the clamping assembly also includes a sliding seat 22 and an elastic member. The elastic member can be a spring 25, a rubber tube or other parts with resilience. As Figure 7 The sliding seat 22 is fixedly arranged on the moving plate 26 through the mounting plate 261, and the blowing rod 21 can slide and pass through the sliding seat 22. The blowing rod 21 is located on the side of the sliding seat 22 close to the clamping assembly 30 and is sleeved with a spring 25. One end of the spring 25 abuts against the sliding seat 22, and the other end abuts against the blowing rod 21. Figure 6 . The corresponding protruding rod body on the blowing rod 21 is provided with a stopper 211, and the outer diameter of the stopper 211 is larger than the outer diameter of the rod body in the area where the spring 25 is sleeved. In this way, when the blowing drive 23 drives the movable plate 26 to move, the blowing rod 21 on the movable plate 26 first contacts the joint 101. At this time, the blowing drive 23 still drives the movable plate 26 to move. The movable plate 26 and the blowing rod 21 move relative to each other to gradually compress the spring 25. The gradually increasing elastic force of the spring 25 acts on the blowing rod 21, and the contact force between the blowing rod 21 and the joint 101 gradually increases, making the connection between the blowing rod 21 and the joint 101 tighter. The use of the spring 25 as the contact force source between the blowing rod 21 and the joint 101 avoids the impact caused by the direct drive of the blowing drive 23. The elastic force generated by the corresponding spring 25 is limited. In this way, the clamping assembly 30 or the clamping assembly will not be damaged during long-term use due to the excessive thrust of the blowing rod 21, thereby increasing the service life of the entire device.

[0049] In order to further improve the sealing performance of the connection between the blowing rod 21 and the joint 101, a sealing bevel 215 is provided at one end of the blowing rod 21 facing the clamping assembly 30, and the shape of the sealing bevel 215 matches the interface outer wall 1011 of the joint 101. Such a setting makes the sealing contact area between the blowing rod 21 and the joint 101 larger. The joint 101 in the medical field generally adopts a Luer joint, and the corresponding sealing bevel 215 can be set to an inclination angle of 6:100 that is adapted to the Luer joint. When the blowing rod 21 is set in this way, it can achieve a good sealing effect with the joint 101 without excessive extrusion force when it is against the joint 101. A vent 214 is also provided in the blowing rod 21, and the vent 214 is connected to the sealing bevel 215. An air inlet 213 is also provided at the end of the blowing rod 21 away from the spring 25. The air inlet 213 is connected to the vent 214 , and the gas enters the vent 214 through the air inlet 213 , and then flows through the sealing bevel 215 and enters the interior of the infusion set 100 from the interface of the connector 101 . Figure 8 The sealing bevel 215 shown has a larger aperture toward the rod end and gradually becomes smaller inward, and the corresponding aperture change range is not very large, which is to adapt to the shape of the interface outer wall 1011 of the joint 101. In addition, the sealing bevel 215 can also be provided with a larger inclination guide angle on the side close to the rod end, which serves to guide the initial contact between the blowing rod 21 and the joint 101, so that the contact between the two is smoother. The corresponding chamfer can also be replaced with a rounded corner.

[0050] Furthermore, the blowing mechanism 20 also has a rotation drive assembly, which is arranged on the movable plate 26 and is driven and connected to the blowing rod 21, and can drive the blowing rod 21 to rotate. The corresponding blowing rod 21 slides and passes through the sliding seat 22, and its sliding includes axial sliding and radial rotation. The clamping assembly also includes a swivel bearing 24, which is arranged between the spring 25 and the blowing rod 21, and one side of the swivel bearing 24 abuts on the stopper 211 of the blowing rod 21, and the other end abuts on the spring 25. Or the swivel bearing 24 is arranged between the spring 25 and the sliding seat 22, and one side of the swivel bearing 24 abuts on the sliding seat 22, and the other end abuts on the spring 25. In this way, the blowing rod 21 will not drive the spring 25 to rotate when it rotates radially, and there will be no friction between the spring 25 and the blowing rod 21 or the spring 25 and the sliding seat 22. After the blowing drive 23 drives the blowing rod 21 to rest against the joint 101, the rotating driving assembly drives the blowing rod 21 to rotate. Under the action of the pressure of the spring 25, the sealing bevel 215 contacts the outer wall of the joint 101 more closely, avoiding unsatisfactory sealing effect due to friction or docking accuracy problems, and further enhancing the sealing effect by extrusion and rotation.

[0051] For further information, see Figure 6 , the rotary drive assembly is arranged on the movable plate 26, and the rotary drive assembly includes a rotating member 27, a rotating guide seat 28 and a rotating drive member 29. The rotating guide seat 28 is fixedly arranged on the movable plate 26 by means of the second mounting plate 262, and the rotating member 27 is slidable and is arranged through the rotating guide seat 28, and its sliding also includes axial sliding and radial rotation. The axial direction of the rotating member 27 is in the same direction as the axial direction of the blowing rod 21. The rotating drive member 29 is fixedly arranged on the movable plate 26 by means of the third mounting plate 263, and the rotating drive member 29 is a cylinder. The rotating member 27 is connected to the extending rod of the cylinder by means of a movable joint. A through hole is opened on the rotating member 27 perpendicular to the axial direction, and the guide column 272 passes through the through hole and is fixed to the rotating member 27, such as Fig. 9 . A guide groove 281 that penetrates the side wall is provided on the side wall of the rotating guide seat 28. The extension direction of the guide groove 281 forms an angle with the moving direction of the blowing rod 21, and the guide column 272 is located in the guide groove 281. When the cylinder drives the rotating part 27 to slide axially, the guide column 272 is limited by the trajectory of the guide groove 281 to move, so that the rotating part 27 rotates while moving axially. In this way, only one cylinder is needed to realize the axial movement and radial rotation of the rotating part 27. A limiting groove 271 is also provided at one end of the rotating part 27 close to the blowing rod 21. The extension direction of the limiting groove 271 is parallel to the moving direction of the blowing rod 21. The corresponding blowing rod 21 also protrudes and is fixedly connected to a limiting column 212. The limiting column 212 is perpendicular to the axial direction of the blowing rod 21, and the limiting column 212 is located in the limiting groove 271. Fig. 9When the rotating member 27 is driven by the cylinder to move axially and rotate radially, the rotating member 27 can only rotate with the blowing rod 21 because the limiting column 212 and the limiting groove 271 can move relatively in the axial direction of the rotating member 27. The advantage of this design is that the rotating drive assembly will not affect the axial movement when driving the blowing rod 21 to rotate, so that the extrusion force between the blowing rod 21 and the joint 101 will not change.

[0052] For further information, see Figure 7 and Fig. 9 , using the above-mentioned rotary drive assembly, the spring 25 moves from between the slewing bearing 24 and the sliding seat 22 to between the blowing rod 21 and the rotating member 27, and the position is Fig. 9 The middle part points to the area of ​​the limiting groove 271. When the rotating drive member 29 is not driven first, the blowing drive member 23 drives the moving plate 26 to move, thereby driving the blowing rod 21, the rotating member 27, and the rotating drive member 29 to move together. When the blowing rod 21 contacts the joint 101 and stops, the rotating drive member 29 drives the rotating member 27 to slide axially and rotate radially. The relative distance between the rotating member 27 and the blowing rod 21 becomes smaller, thereby compressing the spring 25. The elastic force generated by the spring 25 increases the abutment force of the blowing rod 21 contacting the joint 101. At the same time, the radial rotation of the rotating member 27 drives the blowing rod 21 to rotate, and the rotation while abutting makes the blowing rod 21 contact the joint 101 more closely. In this arrangement, because the spring 25 is located in the rotating member 27, there is no relative friction when it rotates with the rotating member 27 and the blowing rod 21, and the slewing bearing 24 can be omitted. In this way, the spring 25 is not sleeved on the blowing rod 21, and the air inlet 213 on the blowing rod 21 can be set on the side of the sliding seat 22 close to the clamping assembly 30. It can be understood that when the moving plate 26 and the blowing drive member 23 are eliminated, the sliding seat 22 is directly fixed on the workbench 70, and the same driving effect is achieved by increasing the driving stroke of the rotating drive member 29 and changing the trajectory of the guide groove 281 in the rotating guide seat 28. On the basis of the trajectory of the original guide groove 281, a straight section guide groove 281 parallel to the axis of the rotating member 27 is added to the end away from the blowing rod 21. This is when the rotating drive member 29 is set to drive the rotating member 27, the rotating member 27 first slides axially along the straight section guide groove 281, thereby driving the blowing rod 21 to approach the joint 101. The rotating member 27 then rotates along with the movement of the inclined section guide groove 281, and then drives the blowing rod 21 to rotate. Naturally, when the blowing rod 21 does not need to rotate, the guide groove 281 may only have a straight line segment. At this time, the rotating driving member 29 only drives the blowing rod 21 to move axially, and the rotating driving member 29 at this time is the blowing driving member 23.

[0053] It should be noted that the rotary drive assembly can also be a servo motor drive module, a rotary cylinder drive module, or a drive that drives a rack and a gear with a cylinder, such as Fig.10The end of the extension rod of the push gear cylinder 113 is connected to the movable joint 101, and the movable joint 101 is connected to the guide rail 116. A rack 112 is installed below the guide rail 116. The slider 115 and the push gear cylinder 113 are fixedly installed on the mounting plate 261. When the cylinder drives the extension rod to extend, the guide rail 116 is driven to slide relative to the slider 115. The rack 112 drives the main rotating gear 111 below to rotate as the guide rail 116 moves. Each blowing rod 21 is provided with a synchronous gear 114. Driving one of the blowing rods 21 to rotate can drive all the blowing rods 21 to rotate.

[0054] It should be noted that the part where the sliding seat 22 contacts the blowing rod 21 can be made of a wear-resistant and smooth material, such as an engineering plastic bearing material; or the sliding seat 22 can be made of a linear bearing; or the sliding seat 22 is in the form of a rotating bearing 221 plus a sleeve 222 / spline nut, the rotating bearing 221 provides the blowing rod 21 with radial rotation freedom, and the sleeve 222 / spline nut and the blowing rod 21 only have axial sliding freedom. Other methods are also acceptable as long as the blowing rod 21 can slide axially and rotate radially. When the sliding seat 22 is in the form of a rotating bearing 221 plus a sleeve 222, the slewing bearing 24 in the above embodiment may not be needed, and the spring 25 rests between the stop portion 211 and the sleeve 222. When the blowing rod 21 rotates, the sleeve 222 and the spring 25 are driven to rotate together, so that there is no friction between the spring 25 and the stop portion 211 or the sleeve 222. Fig.12 The air inlet 213 of the blowing rod 21 in the figure is located on the end surface of the blowing rod 21 .

[0055] It should be noted that a shaft retaining ring may also be provided on the blowing rod 21 to limit the axial movement distance of the blowing rod 21 and prevent the blowing rod 21 from being pushed out of the sliding seat 22 due to the elastic force of the spring 25 .

[0056] See also Figure 3 and Figure 4, the air inlet 213 of the blowing rod 21 is connected to a three-way joint through an air pipe, and the other two ends of the three-way joint are connected to the pressure sensor 60 at one end and the air circuit opening and closing component 50 at the other end. The other end of the air circuit opening and closing component 50 is connected to the air source, and the air circuit opening and closing component 50 can block the gas from the air source from flowing into the pressure sensor 60 and the blowing rod 21. When the blowing rod 21 is in sealing contact with the joint 101 of the infusion set 100 and the other side is blocked by the blocking component 80, the air circuit opening and closing component 50 opens to blow gas higher than atmospheric pressure into the infusion set 100. When the pressure in the infusion set 100 reaches a certain value, the air circuit opening and closing component 50 closes to block the gas from the air source from continuing to enter the infusion set 100. At this time, this part of the air circuit in the infusion set 100 and the blowing rod 21 forms a sealed space. After waiting for a certain period of time, if there is a leak in the infusion set 100, the air pressure in this sealed space will become smaller, so that it can be judged whether the infusion set 100 is qualified. In addition, a pressure regulating valve 40 is connected between the gas source and the gas circuit opening and closing member 50. The pressure regulating valve 40 can effectively stabilize gas pressure fluctuations, ensure that the gas pressure filled into the infusion set 100 is stable each time, and improve the reliability of the entire sealing detection device.

[0057] It should be noted that the pressure sensor 60 may be a vacuum switch, a differential pressure sensor or other sensor for detecting gas pressure value or pressure change. The gas circuit opening and closing member 50 may be a gas circuit switch such as a solenoid valve or a diaphragm valve.

[0058] See also Figure 1 and Fig.10 The blocking assembly 80 and the tidying assembly 90 are fixedly arranged on the frame 12, and the tidying assembly 90 is located above the blocking assembly 80. The blocking assembly 80 includes a blocking driving member 81, a blocking pressure block 82 and a supporting plate 83. The blocking driving member 81 is driven and connected to the blocking pressure block 82, and the supporting plate 83 is arranged on the side of the blocking pressure block 82 close to the blowing mechanism 20. When the infusion set 100 is moved into place, the air inlet pipe 105 at one end of the plastic needle 104 hangs between the supporting plate 83 and the blocking pressure block 82. The blocking driving member 81 drives the blocking pressure block 82 to move, and squeezes the air inlet pipe 105 on the supporting plate 83, so that the air inlet pipe 105 cannot circulate gas with the outside. The thickness of the side of the blocking pressure block 82 in contact with the air inlet pipe 105 is set to be thinner, so that the blocking is more reliable. In order to ensure that the air inlet pipe 105 accurately enters between the blocking block 82 and the abutment plate 83 during the transfer of the infusion pump 100, the blocking assembly 80 is further provided with a guide rod 84. The guide rod 84 spans the space between the blocking block 82 and the abutment plate 83. The end of the guide rod 84 facing the incoming direction of the infusion pump 100 is slightly farther away from the abutment plate 83, which is conducive to guiding the air inlet pipe 105 along the guide rod 84 into the space between the blocking block 82 and the abutment plate 83.

[0059] Furthermore, before the blocking component 80 blocks the air intake pipe 105, there is also a aligning component 90 to align the air intake pipe 105. The aligning component 90 includes an aligning lifting cylinder 91, a limiting air claw 92 and a limiting component 93, and the limiting component 93 includes an aligning member 1 931, an aligning member 2 932, a connecting member 1 933 and a connecting member 2 934. The aligning member 1 931 is arranged on the connecting member 1 933, the aligning member 2 932 is arranged on the connecting member 2 934, the limiting air claw 92 is driven and connected to the connecting member 1 933 and the connecting member 2 934, and the limiting air claw 92 is driven and connected to the aligning lifting cylinder 91. When the infusion pump 100 is delivered to the right position, the tidy lifting cylinder 91 drives the limit claw 92 to move downward, thereby driving the limit assembly 93 to move downward, and then the limit claw 92 drives the tidy piece 1 931 and the tidy piece 2 932 to approach each other to limit the position of the air inlet pipe 105. The advantage of this is that the air inlet pipe 105 is accurately located between the blocking block 82 and the abutment plate 83, ensuring that the air inlet pipe 105 is blocked to avoid misdetection.

[0060] It should be noted that in the above scheme, the blowing rod 21, the sliding seat 22, the rotating member 27, the rotating guide seat 28, the blocking block 82, the aligning member 1 931 and the aligning member 2 932 are all in multiple numbers and are arranged along the moving direction of the infusion set 100.

[0061] It should be noted that when the material to be tested for sealing is sealed at one end away from the blowing mechanism 20 or the plastic needle 104 of the infusion set 100 does not have an air inlet tube 105, the sealing component 80 can be omitted if no additional sealing is required.

[0062] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described, or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims. In addition, other structures in the drawings are relatively simple, and those skilled in the art can clearly understand them by looking at the drawings and will not be elaborated in the description.

Claims

1. A sealing detection device, comprising a transfer mechanism (13), an air blowing mechanism (20), a clamping assembly (30), an air path opening and closing member (50) and a pressure sensor (60), wherein the air blowing mechanism (20) and the clamping assembly (30) are arranged on a frame on one side of the transfer mechanism (13), the clamping assembly (30) is located between the transfer mechanism (13) and the air blowing mechanism (20), and the clamping assembly (30) is used to clamp the object to be detected transported by the transfer mechanism (13), characterized in that: The blowing mechanism (20) comprises a pressing assembly, the pressing assembly comprises a blowing rod (21), a sliding seat (22), an elastic member and a blowing driving member (23), the blowing rod (21) is slidably arranged on the sliding seat (22), the blowing driving member (23) is drivingly connected to the blowing rod (21), and the blowing rod (21) comprises an air inlet (213) and an air vent (214); The air blowing driving member (23) drives the air blowing rod (21) to move toward the object to be detected, and the elastic member provides an extrusion force when the air blowing rod (21) abuts against the object to be detected, and the detection gas enters the interior of the object to be detected from the air inlet (213) through the air vent (214), and the air inlet (213) is connected to the air circuit opening and closing member (50) and the pressure sensor (60).

2. A sealing detection device according to claim 1, characterized in that: A sealing oblique opening (215) is provided at one end of the blowing rod (21) close to the clamping assembly (30), and the sealing oblique opening (215) is adapted to be arranged with the air inlet end of the object to be detected.

3. A sealing detection device according to claim 2, characterized in that: The blowing mechanism (20) further comprises a rotation driving component, wherein the rotation driving component is fixedly arranged relative to the sliding seat (22), and the rotation driving component is drivingly connected to the blowing rod (21).

4. A sealing detection device according to claim 3, characterized in that: The clamping assembly also includes a movable plate (26), the blowing drive member (23) is drivingly connected to the movable plate (26), the movable plate (26) is movably arranged on a frame, the sliding seat (22) and the rotating drive assembly are fixedly arranged on the movable plate (26), the rotating drive assembly is arranged on a side of the blowing rod (21) away from the clamping assembly (30), the blowing rod (21) has a plurality of blowing rods (21), and the plurality of blowing rods (21) are arranged on the movable plate (26) along the conveying direction of the conveying mechanism (13).

5. A sealing detection device according to claim 4, characterized in that: The blowing rod (21) further comprises a stopper (211), the elastic member is sleeved on the blowing rod (21) and is arranged between the stopper (211) and the sliding seat (22), the pressing assembly further comprises a swivel bearing (24), the swivel bearing (24) is sleeved on the blowing rod (21), and the swivel bearing (24) is arranged between the elastic member and the stopper (211) or between the elastic member and the sliding seat (22).

6. A sealing detection device according to claim 4, characterized in that: The sliding seat (22) comprises a rotary bearing (221) and a sliding sleeve (222), there are at least two rotary bearings (221), two ends of the sliding sleeve (222) are arranged in the two rotary bearings (221), the blowing rod (21) and the sliding sleeve (222) are axially movable and radially limited, the blowing rod (21) further comprises a stopper (211), and the elastic member is sleeved on the blowing rod (21) and arranged between the stopper (211) and the sliding sleeve (222).

7. A sealing detection device according to claim 4, characterized in that: The rotary drive assembly comprises a rotating member (27), a rotating guide seat (28) and a rotating drive member (29); the rotating member (27) is slidably arranged on the rotating guide seat (28); the rotating guide seat (28) and the rotating drive member (29) are fixedly arranged on the movable plate (26); a limiting groove (271) is provided on a side of the rotating member (27) close to the blowing rod (21); a limiting column matched with the limiting groove (271) is fixedly arranged on the blowing rod (21); a guide groove (281) is provided on the rotating guide seat (28); a guide column (272) matched with the guide groove (281) is fixedly arranged on the rotating member (27); and the elastic member is arranged between the blowing rod (21) and the rotating member (27).

8. A sealing detection device according to claim 4, characterized in that: The rotary drive assembly comprises a tooth-pushing cylinder (113), a main rotary gear (111), a rack (112), a synchronous gear (114), a slider (115) and a guide rail (116); the tooth-pushing cylinder (113) and the slider (115) are fixedly arranged on a movable plate (26); the tooth-pushing cylinder (113) is drivingly connected to the guide rail (116); the guide rail (116) is movably arranged on the slider (115); the rack (112) is fixed below the guide rail (116); the main rotary gear (111) matched with the rack (112) is fixedly arranged on one of the blowing rods (21); each of the blowing rods (21) is provided with the synchronous gear (114), and a plurality of the synchronous gears (114) are located on the same straight line.

9. A sealing detection device according to any one of claims 1 to 8, characterized in that: The clamping assembly (30) comprises a clamping drive member (32), an upper clamping member (33), a clamping drive member (36), and a lower clamping member (34); the clamping drive member (32) is fixedly arranged on a frame and is drivingly connected to the upper clamping member (33); the clamping drive member (36) is fixedly arranged on the frame and is drivingly connected to the lower clamping member (34); the upper clamping member (33) and the lower clamping member (34) are driven to abut against each other for clamping the object to be detected; the clamping assembly (30) further comprises a blocking member (37); the blocking member (37) is fixedly connected to the frame; at least the blocking member (37) is movably connected to the lower clamping member (34).

10. A sealing detection device according to any one of claims 1 to 8, characterized in that: The sealing detection device also includes a pressure regulating valve (40), the outlet of the air circuit opening and closing component (50) is connected to the air inlet (213) and the pressure sensor (60), and the inlet of the air circuit opening and closing component (50) is connected to the air source through the pressure regulating valve (40).

11. A sealing detection device according to any one of claims 1 to 8, characterized in that: The sealing detection device also includes a blocking component (80), which is arranged on a frame on a side of the transfer mechanism (13) away from the blowing mechanism (20), and the blocking component (80) includes a blocking pressure block (82), a supporting plate (83), a guide rod (84) and a blocking driving member (81), wherein the blocking driving member (81) is drivingly connected to the blocking pressure block (82), the supporting plate (83) and the guide rod (84) are located between the blocking pressure block (82) and the transfer mechanism (13) and are fixedly arranged on the frame, and the guide rod (84) is located between the blocking pressure block (82) and the supporting plate (83).

12. A sealing detection device according to claim 11, characterized in that: The sealing detection device also includes an alignment component (90), the alignment component (90) is located above the blocking component (80) and is fixedly arranged on the frame, the alignment component (90) includes an alignment lifting cylinder (91), a limiting air claw (92) and a limiting component (93), the alignment lifting cylinder (91) is drivingly connected to the limiting air claw (92), the limiting component (93) includes an alignment piece 1 (931), an alignment piece 2 (932), a connecting piece 1 (933) and a connecting piece 2 (934), the limiting air claw (92) is drivingly connected to the connecting piece 1 (933) and the connecting piece 2 (934), a plurality of the alignment pieces 1 (931) are fixed to the connecting piece 1 (933), the same number of the alignment pieces 2 (932) are fixed to the connecting piece 2 (934), the alignment pieces 1 (931) and the alignment pieces 2 (932) are paired and driven by the limiting air claw (92) to approach each other.

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