An air tightness detection device based on liquid medicine filter

Abstract

The present invention relates to the field of air tightness detection technology, and in particular to an air tightness detection device based on a liquid medicine filter, which includes a feeding module, a conveying module and a detection module. The feeding module and the conveying module are used to sort and arrange the materials and then send them to the detection module; the detection module includes a test module, a fixed module and a second material picking clamp module. The test module can automatically realize the blocking of the material through the blocking cylinders set at both ends of the fixed carrier, and then the material is tested for air tightness through the tester. The second material picking clamp module is used to clamp the material in the material carrier and send it to the fixed carrier. The fixed module includes a clamping component and a driving component. The driving component can control the movement and removal of the clamping component to the fixed carrier position, taking into account the fixation of the material and the smoothness of the material picking. The air tightness detection device based on the liquid medicine filter provided by the present invention can automatically realize the fully automated air tightness detection of the liquid medicine filter, which can effectively improve the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to an air tightness detection device based on a drug liquid filter. Background Art

[0002] The drug liquid filter is mainly used to filter the drug liquid during the patient's infusion process. Once leakage and air leakage occur, it will inevitably have unpredictable effects on the treatment.

[0003] At present, the manufacturing process of drug liquid filters uses ultrasonic welding and hot welding processes. Compared with one-piece molding, the welding quality is easily affected by factors such as differences in process levels and interference during execution, and the sealing is relatively low. In order to ensure the qualified rate of products leaving the factory and ensure medical safety, it is necessary to conduct air tightness testing on the drug liquid filters to eliminate unqualified products.

[0004] In the prior art, in the air tightness detection of the drug liquid filter, it is necessary to simultaneously achieve the fixation and sealing of the drug liquid filter. There are many related components, which is not conducive to the automatic realization of compatible loading and unloading. Therefore, the current air tightness detection equipment for the drug liquid filter is mostly semi-automatic equipment, which requires workers to operate the semi-automatic equipment for production, and the efficiency is low. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide an airtightness detection device based on a drug liquid filter to solve the problems of low automation and low production efficiency of the airtightness detection device in the prior art.

[0006] The present invention provides an air tightness detection device based on a liquid medicine filter, comprising: a feeding module, a conveying module and a detection module, wherein:

[0007] The feeding module includes a vibration feeding module and a material separation module, which is used to sort the materials to be tested into the discharge grid of the material separation module;

[0008] The conveying module includes a conveyor belt module and a first material picking claw module, wherein a material carrier is provided on the conveyor belt of the conveyor belt module, and the first material picking claw module is used to pick up the material in the discharge grid and send it to the material carrier, so as to send the material to the detection module through the conveyor belt module;

[0009] The detection module includes a test module, a fixing module and a second material taking clamping claw module;

[0010] The test module includes a fixed carrier for fixing the material, a tester and a plugging cylinder. The plugging cylinder is arranged on both sides of the fixed carrier and is used for plugging and sealing at both ends of the material. The tester is used to perform an airtightness test on the material after the material is plugged.

[0011] The second material picking claw module is used to pick up the material in the material carrier and send it to the fixed carrier;

[0012] The fixed module includes a clamping assembly and a driving assembly, wherein the clamping assembly is arranged in the space above the fixed carrier, and the driving assembly is used to control the clamping action of the clamping assembly to the fixed carrier position, and control the displacing action of the clamping assembly to the fixed carrier position;

[0013] The material distribution module is provided with a plurality of sorting lanes, the number of the sorting lanes is the same as the number of the feeding channels of the vibration feeding module, and they are arranged one by one, the number of the material grids of the material discharging grid is greater than the number of the sorting lanes, and the material distribution module further includes a first base, a second base and a material blocking sheet metal;

[0014] The discharging grid is arranged on the second base for transverse sliding along the feeding direction, so as to adjust the alignment area between each grid of the discharging grid and the sorting channel, and perform staggered loading;

[0015] The second base is slidably disposed on the first base along the feeding direction, and is used to control the distance between the discharge grid and the sorting path, so that when the material is conveyed to the discharge grid, the discharge grid is controlled to be close to the sorting path, and when the discharge grid is staggered for loading, the discharge grid is controlled to be spaced apart from the sorting path;

[0016] The material blocking sheet metal is movably connected to the first base up and down, and the material blocking sheet metal includes a material blocking claw extending downward, which is used to control the downward movement of the material blocking sheet metal before the offset loading, until the material blocking claw extends into each of the sorting lanes to block the material from being transported to the offset moving material grids.

[0017] Optionally, there are multiple groups of material carriers, and at least one material carrier in each group of material carriers is also provided with a photoelectric sensing sheet. The conveyor belt module also includes a photoelectric switch fixedly arranged in the conveying direction, which is used to suspend conveying when the photoelectric sensing sheet triggers the photoelectric switch to facilitate loading and unloading of materials to the material carrier, and resume conveying after loading and unloading are completed.

[0018] Optionally, the first material picking clamp module and the second material picking clamp module both include a horizontal moving mechanism and a clamp mechanism, the clamp mechanism translates between various material picking positions through the horizontal moving mechanism, the clamp mechanism includes a vertical cylinder and a finger clamp, the vertical cylinder is used to control the movement of the finger clamp in the vertical direction;

[0019] Among them, a plurality of photoelectric switch components are also arranged in the horizontal moving mechanism and the clamping mechanism, and the setting position of each photoelectric switch component corresponds to each material picking position one by one, and is used to position the clamping mechanism above the corresponding material picking position according to the triggering of the photoelectric switch component, and obtain the position of the clamping mechanism according to the triggering condition of each photoelectric switch component.

[0020] Optionally, the conveying module is provided with at least one group of the conveying belt modules, and the conveying belt modules are arranged in parallel, and at least one detection module is arranged in the conveying direction of one of the conveying belt modules.

[0021] Optionally, the detection module also includes a lower material bin, and the lower material bin and the corresponding conveyor belt module are respectively arranged on both sides of the test module, and the lower material bin includes a good material bin and a defective material bin arranged along the feeding direction of the second material picking clamp module, the bottom surface of the good material bin is inclined, and a discharge window is provided on the low side of the good material bin.

[0022] Optionally, the driving assembly includes a first mounting plate, a second mounting plate and a third mounting plate which are arranged in sequence from bottom to top, the second mounting plate and the third mounting plate are respectively located below and above the fixed carrier and are fixedly connected via side plates, the first mounting plate and the second mounting plate are movably connected via linear bearings, and the second mounting plate is controlled to move up and down relative to the first mounting plate via a clamping driving cylinder, the first mounting plate is also movably arranged with a horizontal guide rail, and the movement of the first mounting plate on the horizontal guide rail is controlled via a horizontal driving cylinder, thereby controlling the movement of the clamping assembly mounted on the third mounting plate to the fixed carrier;

[0023] The clamping assembly includes a guide rod fixedly arranged on the third mounting plate through an oil-free bushing, the guide rod is vertically extended downward, and a contact pad is arranged at the end.

[0024] Optionally, buffers are further provided at both ends of the horizontal guide rail for reducing the impact force when the first mounting plate moves to a limit position along the horizontal guide rail.

[0025] Optionally, the tester includes a pressure regulating valve, a stop valve, a one-way valve and a pressure sensor arranged in sequence along the air inlet end to the air outlet end of its air transmission pipeline;

[0026] A plugging head is provided at the end of the telescopic part of the plugging cylinder, which is used to drive the plugging head through the plugging cylinder to seal the two ends of the material fixed in the fixed carrier, and one of the two plugging heads is also provided with an air supply channel, one end of which is used to connect the material, and the other end is used to connect the air outlet end of the tester;

[0027] The tester is used to supply gas to the material according to a preset gas pressure, and to determine the air tightness of the material according to the change in the pressure detection value of the pressure sensor after the gas supply.

[0028] Optionally, a sealing nut is also provided at the end of the sealing head provided with the air supply channel, and a polyurethane plug is provided inside the sealing nut, and a silicone sealing head is provided at the end of the other sealing head.

[0029] The air tightness detection device based on the liquid medicine filter provided by the present invention comprises: a feeding module, a conveying module and a detection module, wherein the feeding module comprises a vibrating feeding module and a dividing module, which are used to sort the material to be tested into the discharging grid of the dividing module; the conveying module comprises a conveyor belt module and a first material picking jaw module, wherein a material carrier is arranged on the conveyor belt of the conveyor belt module, and the first material picking jaw module is used to clamp the material in the discharging grid and send it to the material carrier, so as to send the material to the detection module through the conveyor belt module; the detection module comprises a test module, a fixed module and a second material picking jaw module, and the test module comprises a fixed carrier for fixing the material, and a sealing cylinder and a sealing cylinder for sealing both ends of the material. The tester for air tightness test, the second material picking clamping claw module is used to clamp the material in the material carrier and send it to the fixed carrier, the fixed module includes a clamping component and a driving component, the clamping component is arranged in the space above the fixed carrier, the driving component is used to control the movement and removal of the clamping component to the fixed carrier position, before the material is sent to the fixed carrier, the clamping component is controlled to move away, so that the material can be smoothly transferred from the conveyor belt module to the fixed carrier, after the material is placed on the fixed carrier, the second material picking clamping claw module removes the clamping claw, and then controls the clamping component to move to the fixed carrier position, compresses the material, and then tests the air tightness by blocking the cylinder and testing it, after the test is completed, the clamping component is driven to move away, and the material is unloaded. The air tightness detection device based on the liquid medicine filter provided by the present invention can automatically realize the fixing and testing of the material, cooperate with the feeding module and the conveying module, can realize the fully automatic air tightness detection of the liquid medicine filter, and can effectively improve the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the overall structure of an air tightness detection device based on a drug liquid filter in an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the overall top view of the air tightness detection device based on the drug liquid filter in an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the structure of a material distribution module of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention;

[0033] Figure 4It is a structural schematic diagram of a material distribution module of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention from another perspective;

[0034] Figure 5 It is a structural schematic diagram of a first material taking clamping jaw module of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a conveyor belt module of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention;

[0036] Figure 7 It is a structural schematic diagram of a lower bin of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the structure of the detection module part of the air tightness detection device based on the liquid medicine filter in the embodiment of the present invention;

[0038] Fig. 9 Schematic diagram of the structure of a test module of an air tightness detection device based on a liquid medicine filter in an embodiment of the present invention;

[0039] Fig.10 Schematic diagram of the structure of a tester of an air tightness detection device based on a drug liquid filter in an embodiment of the present invention;

[0040] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0044] To solve the problems of low automation and low production efficiency of air tightness detection devices in the prior art. The present invention provides an air tightness detection device based on a liquid medicine filter, including: a feeding module, a conveying module and a detection module. The feeding module and the conveying module are used to realize automatic delivery of materials to the detection module. In the detection module, a test module, a fixed module and a second material picking clamp module are provided. The test module includes a fixed carrier for fixing the material, a sealing cylinder for sealing both ends of the material and a tester for performing air tightness test, which can realize the automation of sealing and testing. The second material picking clamp module is used to clamp the material in the material carrier and deliver it to the fixed carrier. The fixed module includes a clamping component and The drive assembly and the clamping assembly are arranged in the space above the fixed carrier. The drive assembly is used to control the movement and removal of the clamping assembly to the fixed carrier position. Before the material is sent to the fixed carrier, the clamping assembly is controlled to be removed, so as to achieve smooth material transfer from the conveyor belt module to the fixed carrier. After the material is placed on the fixed carrier, the second material-taking clamping claw module removes the clamping claw, and then controls the clamping assembly to move to the fixed carrier position to clamp the material, and then tests the air tightness by blocking the cylinder and testing it. After the test is completed, the clamping assembly is driven to lift and release the clamping, and then removed from the fixed carrier position for unloading. The fixing and testing of materials can be realized automatically as a whole. In conjunction with the feeding module and the conveying module, the fully automated air tightness detection of the liquid medicine filter can be realized, which can effectively improve production efficiency.

[0045] Specifically, Figure 1 and Figure 2 As shown, the loading module 1, the conveying module 2 and the detection module 3 are mainly fixedly arranged on the cabinet 4. The loading module 1 includes a vibration feeding module 11 and a dividing module 12. Since the vibration feeding module 11 on the market generally has its own support, it is arranged on one side of the cabinet 4. The cabinet 4 is mainly used as an installation and fixing platform for the conveying module 2 and the detection module 3. At the same time, the space inside the cabinet 4 can also be used for storing tools such as replacement accessories. The vibration feeding module 11 mainly includes a vibration plate. The unloading channel of the vibration plate is arranged in alignment with the dividing module 12, so as to transfer the material to the dividing module 12.

[0046] Further references Figure 3 and Figure 4, is a schematic diagram of the structure of the material sorting module 12 in this embodiment, which has multiple sorting channels 121 arranged in parallel, and a discharging grid 131 is arranged at the end. A linear vibration motor is arranged below the sorting channel 121 to control the vibration of the sorting channel 121 to form a linear vibration feeding mechanism, and the material 101 sent out by the vibration feeding module 11 is further sent to the discharging grid 131 through vibration. In this embodiment, the number of material grids of the discharging grid 131 is twice the number of the sorting channel 121. By controlling the translation of the discharging grid 131 at the end of the sorting channel 121, staggered loading is performed, and twice the material can be collected, increasing the single material taking amount of the conveying module 2 from the discharging grid 131, which can increase the test number of a single test and improve the test speed. In addition, the time-consuming time of the staggered operation of the staggered loading matches the round-trip operation time of the material transfer clamp of the conveying module 2, which can make full use of the round-trip operation time interval of the material transfer clamp and improve the utilization rate of the system components.

[0047] In order to realize the incremental design of the discharge grid 131, in the present embodiment, a material blocking sheet metal 132 is further provided at the discharge position of the sorting channel 121. The material blocking sheet metal 132 includes a material blocking claw extending downward. When the discharge grid 131 needs to be translated, the material blocking sheet metal 132 is driven until its material blocking claw is inserted into the sorting channel 121, so as to block the material 101 in the sorting channel 121, thereby avoiding mutual interference between the material 101 and the discharge grid 131 during the movement of the discharge grid 131, thereby ensuring the effectiveness of the operation.

[0048] In order to facilitate the transfer operation of the material 101 from the sorting channel 121 to the discharge grid 131, the first base 130 is used to be fixed to the cabinet 4, the second base 133 is slidably arranged on the first base 130, the discharge grid 131 is slidably arranged on the second base 133, and the discharge grid 131 is driven by the first cylinder 135 to translate laterally relative to the second base 133 along the discharge direction, the second base 133 can translate relative to the first base 130 along the discharge direction by the drive of the second cylinder 134, and the material blocking sheet metal 132 can move up and down relative to the first base 130 by the drive of the third cylinder 136. Among them, a buffer is also arranged at the end position of the second base 133 and the discharge grid 131 in the respective moving directions to reduce the impact of the cylinder drive, improve the operation stability, provide convenience for the use of low-cost cylinders for driving, reduce costs, and the cylinder drive has a fast response speed, which can improve the system operation efficiency.

[0049] When the discharge grid 131 obtains the material 101 from the sorting channel 121, the material blocking sheet metal 132 is placed in a raised state, and the material 101 can be smoothly delivered from the sorting channel 121 to the empty space of the discharge grid 131. After half of the empty space of the discharge grid 131 is loaded with materials, the third cylinder 136 is actuated, and the material blocking sheet metal 132 moves down to block the delivery of the material 101. At the same time, the second cylinder 134 is actuated to drive the second base 133 away from the sorting channel 121, so that the discharge grid 131 is spaced apart from the sorting channel 121. The first cylinder 135 is activated to move the discharging grid 131 horizontally to align the other half of the empty space with the sorting path 121. The second cylinder 134 is activated to restore the contact between the discharging grid 131 and the sorting path 121 to avoid interference of the gap between them on material transfer. The third cylinder 136 is activated again to lift the blocking sheet metal 132 and resume feeding. This cycle can ensure the stability of feeding and the reliability of the incremental design of the discharging grid 131.

[0050] The driving shaft of the first cylinder 135 is fixedly connected to the material discharging grid 131. A positioning hole is provided in the moving direction of the driving shaft of the first cylinder 135. A limiting piece is provided on the driving shaft of the first cylinder 135. When the driving shaft of the first cylinder 135 extends into the positioning hole and is limited by the limiting piece, it corresponds to a misaligned posture of the material discharging grid 131. By limiting the driving shaft of the first cylinder 135, the loss of the driving shaft in use can be reduced, and the service life of the first cylinder 135 can be increased.

[0051] Further references Figure 5 and Figure 6 The conveying module 2 includes a conveyor belt module 21 and a first material picking claw module 22, wherein a material carrier 210 is arranged on the conveyor belt 212 of the conveyor belt module 21, and the first material picking claw module 22 is used to clamp the material 101 in the discharge grid 131 and send it to the material carrier 210, so as to send the material to the detection module 3 through the conveyor belt module 21. In the present embodiment, two groups of conveyor belt modules 21 are arranged in parallel, and two detection modules 3 are also arranged on the conveying path of each conveyor belt module 21, wherein the loading speed of the loading module 1 and the conveying speed of the conveying module 2 can be adjusted according to the completion speed of a group of material detection by the detection module 3, and combined with the incremental design of the discharge grid 131, the system loading, transportation and detection can be completely and continuously operated, and the production test speed can be increased by increasing the number of conveyor belt modules and detection modules. The specific speed can be specifically designed according to specific needs, and this application will not be described in detail here.

[0052] Among them, in order to avoid the vibration feeding module 11 feeding too fast, resulting in material accumulation in the sorting channel 121, blockage, material stacking and other problems, in the present embodiment, a full material detection sensor 122 is also arranged above the sorting channel 121, which is used to judge whether the material conveying state therein exceeds its conveying capacity according to the material density and conveying smoothness in the sorting channel 121. When it exceeds its conveying capacity or reaches a preset threshold, the vibration feeding module 11 is feedback-controlled to reduce the feeding speed, or the feeding speed of the sorting module 12 is reduced. Specifically, the feeding speed can be reduced by reducing the vibration frequency. If necessary, the conveying can be suspended, or an alarm can be triggered to remind the staff to check manually.

[0053] Air pipes are also provided upstream and downstream of the full material detection sensor 122. The air pipes are directed to each sorting channel 121 and are used to assist the transportation of materials in the sorting channel 121 through airflow. The sorting channel 121 can be set as an inverted T-shaped groove to avoid material derailment.

[0054] Please refer to further Figure 7 , Figure 8 and Fig. 9 In this embodiment, the detection module 3 includes a test module 31, a fixed module and a second material picking clamp module. The test module 31 includes a fixed carrier 311 for fixing the material 101, a tester and a sealing cylinder. The sealing cylinder is arranged on both sides of the fixed carrier 311, and is used for sealing the two ends of the material 101. The tester is used to perform an air tightness test on the material 101 after the material is sealed; the second material picking clamp module is used to clamp the material in the material carrier of the conveying module 2 and send it to the fixed carrier 311, and after the test is completed, the material on the fixed carrier 311 is sent to the lower bin according to the test results; the fixed module includes a clamping assembly and a driving assembly. The clamping assembly is arranged in the upper space of the fixed carrier 311, and the driving assembly is used to control the movement and removal of the clamping assembly to the position of the fixed carrier 311, so as to remove the clamping assembly when feeding and taking out materials from the fixed carrier 311.

[0055] like Figure 5 and Figure 7 As shown, there are schematic diagrams of the structures of the first material picking jaw module 22 and the second material picking jaw module. In this embodiment, the main difference between the first material picking jaw module 22 and the second material picking jaw module lies in the different operating strokes and the fixed positions for picking and placing materials. The same parts are not repeated in this application.

[0056] The first material picking clamp module 22 is mainly fixedly installed on the cabinet 4 through the first mounting frame 220. The first mounting frame 220 is provided with a horizontal moving mechanism 224. The horizontal moving mechanism 224 drives the clamp mechanism to translate between various material picking positions. The clamp mechanism includes a vertical cylinder 222 and a finger clamp 223. The vertical cylinder 222 is used to control the movement of the finger clamp 223 in the vertical direction. The finger clamp 223 is used to clamp the material. The fixed parts of the vertical cylinder 222 and the finger clamp 223 are fixedly arranged on the moving plate 221. The moving plate 221 can translate under the drive of the horizontal moving mechanism 224, thereby driving the vertical cylinder 222 and the finger clamp 223 to move between various material picking positions.

[0057] For the convenience of positioning, in this embodiment, a plurality of photoelectric switch components 226 are further provided in the horizontal moving mechanism and the clamping mechanism, and the setting position of each photoelectric switch component 226 corresponds to each material picking position, and is used to position the clamping mechanism above the corresponding material picking position according to the triggering of the photoelectric switch component, and obtain the position of the clamping mechanism according to the triggering condition of each photoelectric switch component. In this embodiment, the photoelectric switch of the photoelectric switch component is fixedly provided on the first mounting frame 220, and the photoelectric sensor sheet is provided on the moving plate 221, corresponding to the fixed setting of the photoelectric switch that needs wiring, which can facilitate the realization of wiring, and the setting method of the photoelectric switch and the photoelectric sensor sheet can be adjusted according to specific needs.

[0058] In this embodiment, the horizontal moving mechanism 224 uses a belt drive to drive the moving plate 221. A tooth plate is fixedly arranged on the belt, and the tooth plate is meshed and fixedly connected with the moving plate 221, which can ensure the reliability of the transmission drive of the moving plate 221. Two guide rails matching the moving plate 221 are arranged to ensure the stability of the moving plate 221 during movement, thereby ensuring that the material clamped by the clamping mechanism remains stable during movement, and ensuring the reliability of material picking and delivery.

[0059] To facilitate the arrangement of cables for communication and power supply, in this embodiment, a drag chain 225 is provided on the side of the guide rail of the horizontal moving mechanism 224 . The cables are arranged in the drag chain 225 and can move back and forth following the drag chain 225 to adapt to the moving stroke of the moving plate 221 .

[0060] Please refer to further Figure 6, shown is a schematic diagram of the structure of the conveyor belt module of this embodiment. To ensure the conveying stability, in this embodiment, the conveyor belt module 21 includes a guide plate 213, and a conveyor belt guide groove is provided on the guide plate 213. The conveyor belt guide groove is used for limiting and guiding the conveyor belt 212 and the material carrier 210 to prevent the conveyor belt 212 from vibrating during operation and affecting the fixing reliability of the material carrier 210 and the material 101 carried thereon. Specifically, the conveyor belt guide groove is a T-shaped groove, which can effectively limit the vibration of the conveyor belt 212. At the same time, the width of the main part of the material carrier 210 located outside the conveyor belt guide groove is greater than the width of the notch on the top surface of the conveyor belt guide groove, thereby forming an I-shaped structure with the conveyor belt, which can reduce the risk of the material carrier 210 tipping over.

[0061] In order to facilitate batch detection and improve the detection speed, in the present embodiment, a plurality of groups of material carriers 210 are provided, and at least one material carrier in each group of material carriers is also provided with a photoelectric sensing sheet, and the conveyor belt module also includes a photoelectric switch fixedly arranged in the conveying direction (which can be fixed on the guide plate 213), which is used to suspend the conveying when the photoelectric sensing sheet triggers the photoelectric switch to facilitate the loading and unloading operations of the materials to the material carrier, and resume the conveying after the loading and unloading are completed.

[0062] The guide plate 213 is arranged on the main beam 211, and a plurality of guide plates 213 are arranged continuously, so that when some of the guide plates are damaged by collision, only some of the guide plates need to be replaced, thereby reducing the maintenance cost and reducing the size of a single guide plate for easy processing.

[0063] Positioning plates 214 are also provided at the two end areas of the side of the main beam 211, which can improve the installation stability of the guide plates 213 arranged above and below the main beam 211; a second mounting frame 215 is provided in the middle area of ​​the main beam 211, and a third mounting frame 217 is provided at the two end positions. The main beam can be stably fixed on the cabinet 4 through the second mounting frame 215 and the third mounting frame 217, and the third mounting frame 217 is also used for the installation of the conveyor belt drive motor 218; the conveyor belt drive motor 218 is connected to the synchronous wheel transmission, and the conveyor belt is driven by the synchronous wheel. At the position of the synchronous wheel, a protective shell 216 is also provided to surround the synchronous wheel inside the protective shell 216 to prevent debris from falling and damaging the transmission, thereby ensuring the operation reliability of the conveyor belt module.

[0064] For easy material management, please refer to Figure 7 and Figure 8In the present embodiment, the lower material bin and the corresponding conveyor belt module are respectively arranged on both sides of the test module 31, and the lower material bin includes a good material bin 301 and a defective material bin 302 arranged along the feeding direction of the second material picking jaw module. The bottom surface of the good material bin 301 is inclined, and a discharge window 3011 is provided on the low side of the good material bin 301, so that the good material is conveniently transferred from the discharge window 3011 of the good material bin 301 to the material collection basket, and then enters the subsequent factory delivery process. The number of defective products is generally very small, and the defective material bin 302 does not need to be provided with a discharge window. The specific discharge design can be adjusted according to the actual situation, and the direction of the discharge window can be flexibly selected according to the specific setting position of the detection module.

[0065] In order to realize the fully automatic requirements of testing, fixing and material picking during detection, in the present embodiment, the driving assembly includes a first mounting plate 321, a second mounting plate 322 and a third mounting plate 323 which are arranged in sequence from bottom to top. The second mounting plate 322 and the third mounting plate 323 are respectively located below and above the fixed carrier 311, and are fixedly connected through side plates. The first mounting plate 321 and the second mounting plate 322 are movably connected through linear bearings, and the second mounting plate 322 is controlled to move up and down relative to the first mounting plate 321 through a clamping drive cylinder 324. The first mounting plate 321 is also movably arranged with a horizontal guide rail 326. The horizontal guide rail 326 and the test module 31 are fixed to the cabinet 4 through a bottom plate, and the movement of the first mounting plate 321 on the horizontal guide rail 326 is controlled by a horizontal drive cylinder 325, thereby controlling the movement of the clamping assembly installed on the third mounting plate 323 to the fixed carrier 311.

[0066] Buffers 327 are also provided at both ends of the horizontal guide rail 326, which are used to reduce the impact force when the first mounting plate 321 moves to the limit position along the horizontal guide rail 326, reduce the damage caused by the impact force to the vertical layout of the clamping assembly and the driving assembly, ensure the alignment accuracy of the clamping position of the pressure drop assembly and the position of the fixed carrier 311, and further ensure the reliability of the clamping and fixing of the material on the fixed carrier 311, and can increase the translation speed of the clamping assembly and reduce the material picking waiting time of the second material picking jaw module.

[0067] To ensure the fixation of materials, please refer to Fig. 9 The pressing assembly includes a guide rod 332 fixedly arranged on the third mounting plate 323 through an oil-free bushing 331. The guide rod 332 extends vertically downward, and a contact pad 333 is arranged at the end. When the pressing driving cylinder 324 drives the second mounting plate 322 to move downward, the guide rod 332 can be driven to move downward to the contact pad 333 to press the material 101, thereby fixing the material 101. The contact pad 333 can be made of flexible materials such as rubber and silicone to avoid damage to the material 101 caused by rigid contact.

[0068] Further references Fig.10 The tester includes a pressure regulating valve 341, a stop valve 342, a one-way valve 343 and a pressure sensor 344 which are sequentially arranged along the air inlet end to the air outlet end of the air transmission pipeline, and the output air pressure is controlled at a set value through the pressure regulating valve 341.

[0069] A sealing head is provided at the end of the telescopic part of the sealing cylinder, which is used to drive the sealing head through the sealing cylinder to seal the two ends of the material fixed in the fixed carrier 311, wherein the first sealing head 314 corresponding to the first sealing cylinder 312 is used to completely seal one end of the material, and the second sealing head 315 corresponding to the second sealing cylinder 313 is provided with an air supply channel 3150, one end of the air supply channel 3150 is used to connect the material, and the other end is used to connect the air outlet end of the tester.

[0070] During the test, the two sealing cylinders are actuated to seal both ends of the material, and the stop valve 342 is opened for a certain period of time, for example, 1 to 2 seconds, and the input gas is delivered to the material through the one-way valve 343 to deliver a set gas supply value. After the stop valve 342 is closed, the air tightness of the material is judged based on the change in the pressure detection value of the pressure sensor 344 after the gas is delivered. For materials with qualified air tightness, after the stop valve 342 is closed, the sensing value of the pressure sensor 344 is stabilized at the set value; for materials with unqualified air tightness, after the stop valve 342 is closed, the sensing value of the pressure sensor 344 will fluctuate due to leakage, and the sensing value is difficult to stabilize at the set value.

[0071] Since the second plugging head 315 provided with the air supply channel 3150 needs air supply, in this embodiment, a plugging nut 3151 is also provided at the end of the second plugging head 315, and a polyurethane plug 3152 is provided inside the plugging nut 3151, so that the sealing performance is not easily affected by the air supply, thereby ensuring the reliability of the test. A silicone plugging head 3141 is provided at the end of the first plugging head 314, and the first plugging cylinder 312 drives the port of the material to be pressed to ensure the sealing performance, and the silicone plugging head 3141 and the port of the material are nested and matched to wrap the corresponding port of the material 101.

[0072] When the air tightness detection device based on the liquid medicine filter provided by the present invention is in operation, the loading module automatically sorts the material into the discharging grid, the first material picking claw module can automatically grab the material in the discharging grid and send it to the material carrier of the conveyor belt module, and then the conveyor belt module automatically transports the material on the material carrier to the detection module. The detection process includes: placing the sealing cylinder in a retracted state, the fixed module biases the clamping component to the space on one side of the fixed carrier in the test module, the second material picking claw module clamps the material on the material carrier to the fixed module, the fixed module actuates, moves the clamping component to the fixed carrier, compresses the material, and then drives the sealing cylinder to act to seal both ends of the material, the tester supplies air and outputs, and whether the air tightness of the material is qualified can be judged according to the reading of the air pressure sensor; after obtaining the test result, the output of the tester is stopped, the sealing cylinder is placed in a retracted state, the fixed module actuates, the clamping fixation of the material is released, and the clamping component is moved away from the top of the fixed carrier, the second material picking claw module clamps the material on the fixed carrier and sends it to the lower bin. When there are unqualified materials in the current batch of materials, the unqualified materials are preferentially placed in the unqualified bin, and then the module moves to the position of the good product bin to place other qualified materials into the good product bin. Overall, fully automatic operation can be achieved.

[0073] Among them, the number of fixed carriers, the number of testers and the number of finger clamps in the second material picking clamp module correspond one to one, and each finger clamp can move independently so as to accurately control the delivery of good materials and unqualified materials according to the test results obtained by the corresponding tester.

[0074] The unqualified material bin is closer to the test module than the qualified material bin, so that the unqualified materials can be put into the unqualified material bin first, avoiding the unqualified materials from falling into the qualified material bin by mistake when the finger gripper has an abnormality, thereby ensuring the quality reliability of the qualified materials.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above-described embodiments only express several specific implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of protection of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. An air tightness detection device based on a liquid medicine filter, characterized in that: include: Feeding module, conveying module and detection module, among which, The feeding module includes a vibration feeding module and a material separation module, which is used to sort the materials to be tested into the discharge grid of the material separation module; The conveying module includes a conveyor belt module and a first material picking claw module, wherein a material carrier is provided on the conveyor belt of the conveyor belt module, and the first material picking claw module is used to pick up the material in the discharge grid and send it to the material carrier, so as to send the material to the detection module through the conveyor belt module; The detection module includes a test module, a fixing module and a second material taking clamping claw module; The test module includes a fixed carrier for fixing the material, a tester and a plugging cylinder. The plugging cylinder is arranged on both sides of the fixed carrier and is used for plugging and sealing at both ends of the material. The tester is used to perform an airtightness test on the material after the material is plugged. The second material picking claw module is used to pick up the material in the material carrier and send it to the fixed carrier; The fixed module includes a clamping assembly and a driving assembly, wherein the clamping assembly is arranged in the space above the fixed carrier, and the driving assembly is used to control the clamping action of the clamping assembly to the fixed carrier position, and control the displacing action of the clamping assembly to the fixed carrier position; The material distribution module is provided with a plurality of sorting lanes, the number of the sorting lanes is the same as the number of the feeding channels of the vibration feeding module, and they are arranged one by one, the number of the material grids of the material discharging grid is greater than the number of the sorting lanes, and the material distribution module further includes a first base, a second base and a material blocking sheet metal; The discharging grid is arranged on the second base for transverse sliding along the feeding direction, so as to adjust the alignment area between each grid of the discharging grid and the sorting channel, and perform staggered loading; The second base is slidably disposed on the first base along the feeding direction, and is used to control the distance between the discharge grid and the sorting path, so that when the material is conveyed to the discharge grid, the discharge grid is controlled to be close to the sorting path, and when the discharge grid is staggered for loading, the discharge grid is controlled to be spaced apart from the sorting path; The material blocking sheet metal is movably connected to the first base up and down, and the material blocking sheet metal includes a material blocking claw extending downward, which is used to control the downward movement of the material blocking sheet metal before the offset loading, until the material blocking claw extends into each of the sorting lanes to block the material from being transported to the offset moving material grids.

2. The air tightness detection device based on the liquid medicine filter according to claim 1 is characterized in that: There are multiple groups of material carriers, and at least one material carrier in each group of material carriers is also provided with a photoelectric sensor sheet. The conveyor belt module also includes a photoelectric switch fixedly arranged in the conveying direction, which is used to suspend conveying when the photoelectric sensor sheet triggers the photoelectric switch to facilitate loading and unloading of materials to the material carrier, and resume conveying after loading and unloading are completed.

3. The air tightness detection device based on the liquid medicine filter according to claim 1 is characterized in that: The first material picking clamp module and the second material picking clamp module both include a horizontal moving mechanism and a clamp mechanism, the clamp mechanism translates between various material picking positions through the horizontal moving mechanism, the clamp mechanism includes a vertical cylinder and a finger clamp, the vertical cylinder is used to control the movement of the finger clamp in the vertical direction; Among them, a plurality of photoelectric switch components are also arranged in the horizontal moving mechanism and the clamping mechanism, and the setting position of each photoelectric switch component corresponds to each material picking position one by one, and is used to position the clamping mechanism above the corresponding material picking position according to the triggering of the photoelectric switch component, and obtain the position of the clamping mechanism according to the triggering condition of each photoelectric switch component.

4. The air tightness detection device based on the liquid medicine filter according to claim 1 or 3, characterized in that: The conveying module is provided with at least one group of the conveying belt modules, and each of the conveying belt modules is arranged in parallel, and at least one detection module is arranged in the conveying direction of one of the conveying belt modules.

5. The air tightness detection device based on the liquid medicine filter according to claim 1 is characterized in that: The detection module also includes a lower material bin, which and the corresponding conveyor belt module are respectively arranged on both sides of the test module, and the lower material bin includes a good material bin and a bad material bin arranged along the feeding direction of the second material picking clamp module, the bottom surface of the good material bin is inclined, and a discharge window is provided on the low side of the good material bin.

6. The air tightness detection device based on the liquid medicine filter according to claim 1 is characterized in that: The driving assembly includes a first mounting plate, a second mounting plate and a third mounting plate which are arranged in sequence from bottom to top, the second mounting plate and the third mounting plate are respectively located below and above the fixed carrier and are fixedly connected through side plates, the first mounting plate and the second mounting plate are movably connected through linear bearings, and the second mounting plate is controlled to move up and down relative to the first mounting plate through a clamping driving cylinder, the first mounting plate is also movably arranged with a horizontal guide rail, and the movement of the first mounting plate on the horizontal guide rail is controlled through a horizontal driving cylinder, thereby controlling the movement of the clamping assembly installed on the third mounting plate to the fixed carrier; The clamping assembly includes a guide rod fixedly arranged on the third mounting plate through an oil-free bushing, the guide rod is vertically extended downward, and a contact pad is arranged at the end.

7. The air tightness detection device based on the liquid medicine filter according to claim 6 is characterized in that: Buffers are also provided at both ends of the horizontal guide rail to reduce the impact force when the first mounting plate moves to the limit position along the horizontal guide rail.

8. The air tightness detection device based on the liquid medicine filter according to claim 1 is characterized in that: The tester comprises a pressure regulating valve, a stop valve, a check valve and a pressure sensor which are sequentially arranged along the air inlet end to the air outlet end of the air transmission pipeline; A plugging head is provided at the end of the telescopic part of the plugging cylinder, which is used to drive the plugging head through the plugging cylinder to seal the two ends of the material fixed in the fixed carrier, and one of the two plugging heads is also provided with an air supply channel, one end of which is used to connect the material, and the other end is used to connect the air outlet end of the tester; The tester is used to supply gas to the material according to a preset gas pressure, and to determine the air tightness of the material according to the change in the pressure detection value of the pressure sensor after the gas supply.

9. The air tightness detection device based on the liquid medicine filter according to claim 8, characterized in that: A sealing nut is also provided at the end of the plugging head provided with the air supply channel, and a polyurethane plug is provided inside the plugging nut, and a silicone plug is provided at the end of the other plugging head.

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