A plastic infusion bottle leak detection device

Abstract

The present invention discloses a leak detection device for plastic infusion bottles, which is mainly used to detect the sealing performance of the bottle mouths of plastic infusion bottles and prevent liquid leakage. The device includes a first conveying mechanism, a second conveying mechanism and a leak detection mechanism. The transfer component in the leak detection mechanism can transfer the plastic infusion bottles conveyed by the first conveying mechanism to the leak detection platform, drive a pressure sealing cover to seal the bottle mouth through a lifting motion module, provide gas into the pressure sealing cover through a pressure generating component, and detect the air pressure through a pressure sensor to judge whether the bottle mouth leaks. If the detection is unqualified, the defective product falling mechanism will drop the bottle from the leak detection platform, and the qualified bottles will be transferred by the transfer component to the second conveying mechanism for output. The device realizes automatic operation through a PLC controller to ensure the accuracy and efficiency of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of leak detection devices, and more particularly to a leak detection device for plastic infusion bottles. Background Art

[0002] In the medical industry, plastic infusion bottles, as the main packaging containers for liquid medicines, are widely used in medical scenarios such as infusion and injection. The sealing performance of their bottle mouths is directly related to the safety, effectiveness, and sterility of the medicines. Most existing plastic infusion bottles are made by integral injection molding, and the bottle mouths are made of hard plastics (such as polypropylene, polyethylene, etc.). Due to injection molding and bottle body detection, the possibility of liquid leakage in the whole bottle body is extremely low. However, because the bottle mouth needs to be sealed, the bottle mouth may have problems with insufficient sealing. Specifically, it may be the gap between the bottle mouth and the bottle cap or the minute defects of the bottle mouth itself. If the bottle mouth is not sealed tightly, it will cause the liquid medicine to leak during storage or transportation. At the same time, it may become a channel for microorganisms or external pollutants to enter the bottle, resulting in the contamination of the medicine and affecting the sterility and safety of the medicine.

[0003] Currently, the leak detection methods for plastic infusion bottles mainly include manual visual inspection, water immersion leak detection, and air pressure leak detection, etc. However, these methods have the following problems:

[0004] 1. Manual visual inspection: It depends on the experience of the operator, with low detection efficiency and easy to miss detection, and cannot meet the requirements of large-scale production.

[0005] 2. Water immersion leak detection: It is necessary to immerse the infusion bottle in water to observe bubbles. The operation is cumbersome and may damage the bottle body label. At the same time, it cannot detect minute gaps.

[0006] 3. Air pressure leak detection: Although the detection accuracy is relatively high, the existing equipment has a complex structure, high cost, and low automation level, making it difficult to achieve efficient and continuous detection. Summary of the Invention

[0007] Aiming at the above deficiencies existing in the prior art, the purpose of the present invention is to provide a leak detection device for plastic infusion bottles that can accelerate the leak detection effect and ensure the leak detection accuracy.

[0008] The technical solution adopted by the present invention to achieve the above object is as follows: A leak detection device for plastic infusion bottles includes a first conveying mechanism, a second conveying mechanism, and a leak detection mechanism. The first conveying mechanism is used to convey the plastic infusion bottles to be inspected, and the second conveying mechanism is used to convey the plastic infusion bottles that have passed the leak detection without error. The leak detection mechanism is provided between the first conveying mechanism and the second conveying mechanism. The leak detection mechanism includes a mechanism frame, a leak detection platform, a transfer component, a lifting motion module, a pressure leak detection component, and a first motor. The leak detection platform is provided on one side of the first conveying mechanism and the second conveying mechanism, and the mechanism frame is provided on one side of the first conveying mechanism and the second conveying mechanism. The transfer component is provided on the mechanism frame, and the lifting motion module is provided on the mechanism frame. The lifting motion module includes a lifting table capable of realizing lifting motion. The pressure leak detection component is provided on the mechanism frame. The pressure leak detection component includes a pressure generating component capable of supplying pressure and a pressure sealing cover that is pipe-connected with the pressure generating component. A pressure sensor is fixedly connected to the pressure sealing cover, and the pressure sealing cover is fixedly connected to the lifting table. The pressure sealing cover corresponds to the leak detection platform, and after the pressure sealing cover descends, it can seal the bottle mouth part of the plastic infusion bottle located on the leak detection platform;

[0009] A defective product dropping mechanism is provided on the leak detection platform. When the plastic infusion bottle on the leak detection platform fails to pass the leak detection, the defective product dropping mechanism controls the plastic infusion bottle to drop from the leak detection platform;

[0010] The first motor is fixedly connected to the mechanism frame. The first motor is power-connected to the lifting motion module through a first transmission component, and the first motor is power-connected to the pressure generating component through a second transmission component. The first transmission component includes a first one-way transmission part, and the second transmission component includes a second one-way transmission part. Under the action of the first one-way transmission part and the second one-way transmission part, when the first motor drives the lifting motion module to work, the pressure generating component does not work. When the first motor drives the pressure generating component to work, the lifting motion module does not work. The lifting table and the transfer component are power-connected through a linkage component. The linkage component includes a third one-way transmission part. Under the action of the third one-way transmission part, when the lifting table descends, the transfer component does not work. When the lifting table ascends, the transfer component works.

[0011] In the above technical solution, the transfer component adopts the following structure:

[0012] The transfer component includes a transfer turntable and a drive shaft. The transfer turntable is rotatably connected between the first conveying mechanism and the second conveying mechanism. The drive shaft is fixedly connected to the transfer turntable. A plurality of groups of clamping grooves are arranged in a circular array on the transfer turntable. One group of clamping grooves corresponds to the first conveying mechanism, one group of clamping grooves corresponds to the second conveying mechanism, and one group of clamping grooves corresponds to the leak detection platform. The drive shaft is power-connected to the lifting platform through the linkage component. When the lifting platform rises, the transfer turntable rotates a predetermined angle. The plastic infusion bottles on the first conveying mechanism are transferred to the leak detection platform, and the plastic infusion bottles that pass the leak detection on the leak detection platform are transferred to the second conveying mechanism.

[0013] In the above technical solution, the specific structure of the lifting motion module is as follows:

[0014] The lifting motion module further includes a sliding column and a reciprocating lead screw. The sliding column is fixedly connected to the mechanism frame. The lifting platform is slidably connected to the sliding column. The reciprocating lead screw is threadedly connected to the lifting platform. The reciprocating lead screw is power-connected to the first motor through the first transmission component.

[0015] In the above technical solution, the pressure generating component is selected with the following structure:

[0016] The pressure generating component includes a piston cylinder, a piston body, and a piston column. The piston cylinder is fixedly connected to the mechanism frame. The piston body is slidably connected in the piston cylinder. The piston column is fixedly connected to the piston body. An air inlet pipe and an air outlet pipe are fixedly connected to the piston cylinder. A first one-way valve is fixedly connected to the air inlet pipe. A second one-way valve is fixedly connected to the air outlet pipe. The air outlet pipe is connected to the pressure sealing cover through a pipeline. The piston column is power-connected to the first motor through a second transmission component.

[0017] In the above technical solution, the structure of the defective product dropping mechanism is as follows:

[0018] The defective product dropping mechanism includes a second motor and a flipping table. A dropping opening is provided on the leak detection platform. The flipping table is rotatably connected to one side of the dropping opening. The top surface of the flipping table is flush with the top surface of the leak detection platform. The second motor is fixedly connected to the leak detection platform. The second motor is power-connected to the flipping table. The transfer component transfers the plastic infusion bottles on the first conveying mechanism to the flipping table.

[0019] In the above technical solution, the specific structure of the first transmission component is as follows:

[0020] The first transmission assembly further includes a first power input shaft A, a first worm, and a first worm gear. The first power input shaft A is fixedly connected to the reciprocating lead screw. The first worm gear is fixedly connected to the first power input shaft A. The first worm is rotatably connected to the mechanism frame, and the first worm is meshed with the first worm gear;

[0021] A first power input shaft B is fixedly connected to the first worm. A first one-way transmission member is provided on the first power input shaft B. The first one-way transmission member adopts a ratchet component. The first motor is power-connected to the first power input shaft B.

[0022] In the above technical solution, the specific structure of the second transmission assembly is as follows:

[0023] The second transmission assembly further includes a driving arm, a traction arm, a second worm, and a second worm gear. A second power input shaft A is rotatably connected to the mechanism frame. The driving arm is fixedly connected to the second power input shaft A. One end of the driving arm is rotatably connected to the traction arm. One end of the traction arm is rotatably connected to the piston rod. The second worm gear is fixedly connected to the second power input shaft A. The second worm is rotatably connected to the mechanism frame. The second worm is meshed with the second worm gear. A second power input shaft B is rotatably connected to the mechanism frame. A first bevel gear is fixedly connected to the second worm. A second bevel gear is fixedly connected to the second power input shaft B. The first bevel gear is meshed with the second bevel gear. A second one-way transmission member is provided on the second power input shaft B. The second one-way transmission member adopts a ratchet component. The first motor is power-connected to the second power input shaft B.

[0024] In the above technical solution, the specific structure of the linkage component is as follows:

[0025] The linkage component further includes a third worm gear, a third worm, a gear, and a rack. The second worm gear is fixedly connected to the drive shaft. The third worm is rotatably connected to the mechanism frame. The third worm is meshed with the third worm gear. A third power input shaft is fixedly connected to the third worm. A third one-way transmission member is provided on the third power input shaft. The third one-way transmission member adopts a ratchet component. The gear is fixedly connected to the third power input shaft. The gear is located on one side of the power input end of the third one-way transmission member. The rack is fixedly connected to the lifting platform. When the lifting platform moves up and down, the rack can drive the gear.

[0026] In the above technical solution, the power connection modes of the first motor with the second power input shaft B and the first power input shaft B are:

[0027] The power input end of the first motor is power-connected to the second power input shaft B. A driving pulley is fixedly connected to the second power input shaft B, and the driving pulley is located on one side of the power input end of the second one-way transmission member. A driven pulley is fixedly connected to the first power input shaft B, and the driven pulley is located on one side of the power input end of the first one-way transmission member. The driving pulley and the driven pulley are connected by a transmission belt.

[0028] In the above technical solution, to achieve automatic leak detection work, it further includes a PLC controller and a motor driver. The motor driver is signal-connected to the first motor and the second motor, and the PLC controller is signal-connected to the pressure sensor.

[0029] Advantages of the present invention:

[0030] 1. Through the coordinated work of the first conveying mechanism, the second conveying mechanism, and the leak detection mechanism, continuous and efficient detection of plastic infusion bottles is achieved. Through the transfer component (transfer turntable), the infusion bottles can be automatically transferred from the first conveying mechanism to the leak detection platform, and the qualified products can be transferred to the second conveying mechanism after the detection is completed. When it is detected that the bottle mouth seal is unqualified, the second motor drives the turning table to rotate, so that the unqualified infusion bottles are automatically removed from the falling port. In this way, the entire leak detection process does not require manual intervention, significantly improving the production efficiency and being suitable for large-scale industrial production;

[0031] 2. By adopting the combination of the pressure generating component, the pressure sealing cover, and the pressure sensor, the sealing performance of the bottle mouth of the infusion bottle can be accurately detected. After the bottle mouth is sealed by the pressure sealing cover, a predetermined air pressure is applied into the pressure sealing cover, and the air pressure change is monitored by the air pressure sensor, so as to accurately judge whether there are gaps or leaks in the bottle mouth. The accuracy of this detection method is much higher than that of traditional manual leak detection, which can effectively avoid missed detection and false detection and ensure product quality;

[0032] 3. The device as a whole uses the first motor to provide the power required for the lifting motion module, the pressure generating component, and the transfer component, enabling the device to achieve the required functions through a large number of mechanical structures, and reducing the overall power source of the device, resulting in a low failure rate of the device as a whole and being convenient for programming control. Description of the drawings

[0033] Figure 1 It is a schematic structural diagram of the present invention;

[0034] Figure 2 It is a schematic structural diagram of the present invention from another angle;

[0035] Figure 3 It is a front view structural diagram of the present invention;

[0036] Figure 4 Schematic structural diagram of the present invention in the leak detection working state;

[0037] Figure 5 Schematic structural diagram of the present invention in the non - leak detection working state;

[0038] Figure 6 Schematic structural diagram of the pressure sealing cover in the present invention;

[0039] Figure 7 Schematic structural diagram of the pressure generating component in the present invention;

[0040] Figure 8 Schematic structural diagram of the first motor power connection in the present invention;

[0041] Figure 9 Schematic structural diagram of the first motor power connection from another angle in the present invention;

[0042] Figure 10 is Figure 8 Schematic diagram of the detailed structure of part a in;

[0043] Figure 11 is Figure 9 Schematic diagram of the detailed structure of part b in;

[0044] Figure 12 is Figure 9 Schematic diagram of the detailed structure of part c in.

[0045] In the figure: 100 first conveying mechanism;

[0046] 200 second conveying mechanism;

[0047] 300 leak detection mechanism, 301 mechanism frame, 302 leak detection platform, 303 transfer component, 3031 transfer turntable, 3032 drive shaft, 3033 clamping groove, 304 lifting motion module, 3041 sliding column, 3042 lifting table, 3043 reciprocating lead screw, 305 pressure leak detection component, 3051 pressure generating component, 3052 pressure sealing cover, 3053 pressure sensor, 3054 piston cylinder, 3055 piston body, 3056 piston column, 3057 intake pipe, 3058 exhaust pipe, 3059 first one - way valve, 30510 second one - way valve, 306 first motor, 307 defective product falling mechanism, 3071 second motor, 3072 turning table, 3073 falling opening;

[0048] 400 first transmission component, 401 first one - way transmission part, 402 first power input shaft A, 403 first worm, 404 first worm gear, 405 first power input shaft B;

[0049] 500 Second transmission assembly, 501 Second one-way transmission component, 502 Driving arm, 503 Towing arm, 504 Second worm, 505 Second worm gear, 506 Second power input shaft A, 507 Second power input shaft B, 508 First bevel gear, 509 Second bevel gear;

[0050] 600 Linkage assembly, 601 Third one-way transmission component, 602 Third worm gear, 603 Third worm, 604 Third power input shaft, 605 Gear, 606 Rack;

[0051] 701 Driving pulley, 702 Driven pulley, 703 Transmission belt. Detailed implementation mode

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] Please refer to Figures 1-3 , a leak detection device for plastic infusion bottles, including a first conveying mechanism 100, a second conveying mechanism 200 and a leak detection mechanism 300. Among them, the first conveying mechanism 100 is used to convey the plastic infusion bottles to be inspected, and the second conveying mechanism 200 is used to convey the plastic infusion bottles that have passed the leak detection without error;

[0054] Furthermore, a leak detection mechanism 300 is provided between the first conveying mechanism 100 and the second conveying mechanism 200. The leak detection mechanism 300 is used to perform leak detection on the bottle mouths of plastic infusion bottles. Specifically, the leak detection mechanism 300 includes a mechanism frame 301, a leak detection platform 302, a transfer component 303, a lifting motion module 304, a pressure leak detection component 305 and a first motor 306. First of all, a leak detection platform 302 is provided on one side of the first conveying mechanism 100 and the second conveying mechanism 200, and a mechanism frame 301 is provided on one side of the first conveying mechanism 100 and the second conveying mechanism 200. A transfer component 303 is provided on the mechanism frame 301. The transfer component 303 is used to transfer the plastic infusion bottles conveyed by the first conveying mechanism 100 to the leak detection platform 302. In this embodiment, please refer to Figure 4 , Figure 5, the transfer component 303 includes a transfer turntable 3031 and a drive shaft 3032. That is, a transfer turntable 3031 is rotatably connected between the first conveying mechanism 100 and the second conveying mechanism 200. A drive shaft 3032 is fixedly connected to the transfer turntable 3031. Four groups of clamping grooves 3033 are arranged in a circular array on the transfer turntable 3031. One group of clamping grooves 3033 corresponds to the first conveying mechanism 100, one group of clamping grooves 3033 corresponds to the second conveying mechanism 200, and one group of clamping grooves 3033 corresponds to the leak detection platform 302. In this way, the plastic infusion bottles conveyed by the first conveying mechanism 100 can enter the clamping grooves 3033. When the drive shaft 3032 rotates a predetermined angle, it can drive the transfer turntable 3031 to rotate. In this way, the transfer turntable 3031 can transfer the plastic infusion bottles on the first conveying mechanism 100 to the leak detection platform 302. At this time, the plastic infusion bottles that do not leak liquid on the leak detection platform can be synchronously transferred to the second conveying mechanism 200. At the same time, one group of clamping grooves 3033 corresponds to the first conveying mechanism 100. Under the conveying effect of the first conveying mechanism 100, the plastic bottles enter the clamping grooves 3033 again. By circulating in this way, the transfer work between the first conveying mechanism 100, the leak detection platform 302, and the second conveying mechanism 200 can be realized;

[0055] Furthermore, a defective product dropping mechanism 307 is also provided on the leak detection platform 302. When the plastic infusion bottles on the leak detection platform 302 do not pass the leak detection, the defective product dropping mechanism 307 controls the plastic infusion bottles to drop from the leak detection platform 302. Specifically, the defective product dropping mechanism 307 includes a second motor 3071 and a turning platform 3072. A dropping port 3073 is provided on the leak detection platform 302. One side of the dropping port 3073 is rotatably connected to a turning platform 3072. The top surface of the turning platform 3072 is flush with the top surface of the leak detection platform 302. A second motor 3071 is fixedly connected to the leak detection platform 302. The second motor 3071 is power-connected to the turning platform 3072. The transfer component 303 transfers the plastic infusion bottles on the first conveying mechanism 100 to the turning platform 3072. After the second motor 3071 drives the turning platform 3072 to rotate, the plastic infusion bottles can fall out from the dropping port 3073 due to gravity;

[0056] Secondly, please refer to Figures 4-6 , to realize the leak detection of the bottle mouth of the plastic infusion bottle. In this embodiment, a lifting motion module 304 is provided on the mechanism frame 301. The lifting motion module 304 includes a sliding column 3041, a lifting platform 3042, and a reciprocating lead screw 3043. That is, a sliding column 3041 is fixedly connected to the mechanism frame 301. A lifting platform 3042 is slidably connected to the sliding column 3041. A reciprocating lead screw 3043 is threadedly connected to the lifting platform 3042. When the reciprocating lead screw 3043 rotates, the lifting platform 3042 can perform lifting and sliding on the sliding column 3041;

[0057] Furthermore, a pressure leak detection assembly 305 is also provided on the mechanism frame 301. The pressure leak detection assembly includes a pressure generating component 3051 capable of supplying pressure and a pressure sealing cover 3052 that is pipe-connected to the pressure generating component 3051. A pressure sensor 3053 is fixedly connected to the pressure sealing cover 3052, and the pressure sealing cover 3052 is fixedly connected to the lifting table 3042, so that the lifting table 3042 can drive the pressure sealing cover 3052 to move up and down. The pressure sealing cover 3052 corresponds to the leak detection platform 302. When the pressure sealing cover 3052 descends, it can seal the bottle mouth part of the plastic infusion bottle located on the leak detection platform 302. Then, a predetermined gas is provided to the inside of the pressure sealing cover 3052 through the pressure generating component 3051. At this time, the pressure sensor 3053 can detect the air pressure at the bottle mouth position. If the bottle mouth is completely sealed without gaps (no liquid leakage), the air pressure detected by the pressure sensor 3053 is within a reasonable range. If the bottle mouth is not fully sealed with gaps (liquid leakage will occur), the input gas will enter the inside of the plastic infusion bottle through the gaps. In addition, the air pressure will be lower than that of the sealed state, so the air pressure detected by the air pressure sensor is not within a reasonable range;

[0058] Furthermore, please refer to Figures 7-12 , in this embodiment, a first motor 306 is also fixedly connected to the mechanism frame 301. The first motor 306 provides the power required for the leak detection work. Among them, the first motor 306 and the reciprocating lead screw 3043 are power-connected through a first transmission assembly 400. The first transmission assembly 400 includes a first one-way transmission part 401, a first power input shaft A 402, a first worm 403, and a first worm gear 404. That is, a first power input shaft A 402 is fixedly connected to the reciprocating lead screw 3043, a first worm gear 404 is fixedly connected to the first power input shaft A 402, a first worm 403 is rotatably connected to the mechanism frame 301, and the first worm 403 is meshed with the first worm gear 404;

[0059] A first power input shaft B 405 is fixedly connected to the first worm 403, and a first one-way transmission part 401 is provided on the first power input shaft B 405. The first one-way transmission part 401 adopts a ratchet component. The first motor 306 is power-connected to the first power input shaft B 405. In this way, when the first motor 306 rotates forward, under the action of the first one-way transmission part 401, the power can be transmitted to the first worm 403. Then, the first worm 403 drives the first worm gear 404 to rotate, which also makes the first power input shaft A 402 drive the reciprocating lead screw 3043 to rotate. At this time, the lifting table 3042 generates a lifting movement, and by using the self-locking effect of the worm and the worm gear, it can be ensured that after the lifting table 3042 moves, it is in a stable state;

[0060] Furthermore, in this embodiment, the pressure generating component 3051 adopts the following structure:

[0061] The pressure generating component 3051 includes a piston cylinder 3054, a piston body 3055, and a piston column 3056. The piston cylinder 3054 is fixedly connected to the mechanism frame 301. The piston body 3055 is slidably connected inside the piston cylinder 3054. The piston column 3056 is fixedly connected to the piston body 3055. An intake pipe 3057 and an exhaust pipe 3058 are fixedly connected to the piston cylinder 3054. A first one-way valve 3059 is fixedly connected to the intake pipe 3057. A second one-way valve 30510 is fixedly connected to the exhaust pipe 3058. The exhaust pipe 3058 is connected by a pipeline to the pressure sealing cover 3052. When the piston column 3056 moves linearly, the piston body 3055 can be raised or lowered. When the piston body 3055 descends, the gas inside the piston cylinder 3054 can be pushed into the pressure sealing cover 3052 to provide the required detection gas. When the piston body 3055 ascends, the external gas can be drawn into the piston cylinder 3054 for the next use.

[0062] Further, the piston column 3056 and the first motor 306 are power-connected through a second transmission assembly 500. The second transmission assembly 500 includes a second one-way transmission member 501, a driving arm 502, a traction arm 503, a second worm 504, and a second worm gear 505. That is, a second power input shaft A506 is rotatably connected to the mechanism frame 301. A driving arm 502 is fixedly connected to the second power input shaft A506. One end of the driving arm 502 is rotatably connected to a traction arm 503. One end of the traction arm 503 is rotatably connected to the piston column 3056. A second worm gear 505 is fixedly connected to the second power input shaft A506. A second worm 504 is rotatably connected to the mechanism frame 301. The second worm 504 is meshed and connected with the second worm gear 505. A second power input shaft B507 is rotatably connected to the mechanism frame 301. A first bevel gear 508 is fixedly connected to the second worm 504. A second bevel gear 509 is fixedly connected to the second power input shaft B507. The first bevel gear 508 is meshed and connected with the second bevel gear 509. A second one-way transmission member 501 is provided on the second power input shaft B507. The second one-way transmission member 501 adopts a ratchet component. The first motor 306 is power-connected to the second power input shaft B507. In this way, when the first motor 306 rotates in the reverse direction, under the action of the second one-way transmission member 501, the power can be transmitted to the second worm 504. Then, the second worm 504 drives the second worm gear 505 to rotate. Then, the power is transmitted to the second power input shaft A506. At this time, the driving arm 502 can generate rotation. Under the action of the traction arm 503, the piston column 3056 can be driven to move up and down. Because the length of the driving arm 502 is determined, therefore, the distance that the driving arm 502 drives the piston column 3056 to descend each time is the same. That is, the gas volume that the piston body 3055 pushes the gas in the piston cylinder 3054 into the pressure sealing cover 3052 each time is the same. Thus, the accuracy of each detection is ensured;

[0063] Furthermore, because of the first one-way transmission member 401 and the second one-way transmission member 501, when the first motor 306 drives the lifting motion module 304 to work, the pressure generating component 3051 does not work. When the first motor 306 drives the pressure generating component 3051 to work, the lifting motion module 304 does not work;

[0064] Further disclosed, the lifting platform 3042 and the transfer component 303 are also power-connected through a linkage component. In the embodiment, the linkage component includes a third one-way transmission member 601, a third worm gear 602, a third worm 603, a gear 605, and a rack 606. That is, a second worm gear 505 is fixedly connected to the drive shaft 3032, the third worm 603 is rotatably connected to the mechanism frame 301, the third worm 603 is meshed with the third worm gear 602, a third power input shaft 604 is fixedly connected to the third worm 603, the third one-way transmission member 601 is provided on the third power input shaft 604, the third one-way transmission member 601 adopts a ratchet component, the gear 605 is fixedly connected to the third power input shaft 604, the gear 605 is located on one side of the power input end of the third one-way transmission member 601, the rack 606 is fixedly connected to the lifting platform 3042. When the lifting platform 3042 moves up and down, the rack 606 can drive the gear 605. In this way, when the lifting platform 3042 drives the rack 606 to descend, the rack 606 drives the gear 605 to rotate, and under the action of the third one-way transmission member 601, the power cannot be transmitted to the third worm 603, so that the transfer turntable 3031 does not rotate. When the lifting platform 3042 drives the rack 606 to ascend, the rack 606 drives the gear 605 to rotate. At this time, under the action of the third one-way transmission member 601, the power can be transmitted to the third worm 603, so that the third worm 603 drives the third worm gear 602 to rotate, and in this way, the transfer turntable 3031 rotates to achieve the working effect of the transfer component 303. That is, when the lifting platform 3042 ascends, the transfer turntable 3031 rotates a predetermined angle to transfer the plastic infusion bottles on the first conveying mechanism 100 to the leak detection platform 302, and the plastic infusion bottles that are correctly leak-detected on the leak detection platform 302 are transferred to the second conveying mechanism 200;

[0065] Still further, the power connection mode between the first motor 306 and the second power input shaft B507 and the first power input shaft B405 is that the power input end of the first motor 306 is power-connected to the second power input shaft B507. A driving pulley 701 is fixedly connected to the second power input shaft B507, the driving pulley 701 is located on one side of the power input end of the second one-way transmission member 501, a driven pulley 702 is fixedly connected to the first power input shaft B405, the driven pulley 702 is located on one side of the power input end of the first one-way transmission member 401, and the driving pulley 701 and the driven pulley 702 are connected by a transmission belt 703;

[0066] Finally, to achieve automated leak detection, it also includes a PLC controller and a motor driver. The motor driver is signal-connected to the first motor 306 and the second motor 3071, and the PLC controller is signal-connected to the pressure sensor 3053. In this way, the signal detected by the pressure sensor 3053 can be transmitted to the PLC controller. When the pressure data is within the set range, the PLC controller controls the first motor 306 to rotate forward or backward. When the pressure data is not within the set range, the PLC controller controls the second motor 3071 to work to achieve the discharging of defective products.

[0067] To sum up, this embodiment discloses a leak detection device for plastic infusion bottles, which is mainly used to detect the sealing performance of the bottle mouths of plastic infusion bottles to avoid liquid leakage of plastic infusion bottles and affect the use. Specifically, the first conveying mechanism 100 can convey plastic infusion bottles so that a group of plastic infusion bottles are located in the clamping grooves 3033 of the transfer turntable 3031. Then the first motor 306 rotates forward, causing the driving reciprocating screw 3043 to rotate. At this time, the lifting table 3042 drives the rack 606 to rise, and the rack 606 drives the gear 605 to rotate. Under the action of the third one-way transmission member 601, the power is transmitted to the third worm 603, which causes the transfer turntable 3031 to rotate. In this way, the transfer turntable 3031 can transfer the plastic infusion bottles to the predetermined position on the leak detection platform 302.

[0068] When the first motor 306 continues to rotate forward and drives the reciprocating screw 3043 to rotate, the lifting table 3042 can drive the pressure sealing cover 3052 to descend again until the pressure sealing cover 3052 seals the bottle mouth of the plastic infusion bottle.

[0069] The first motor 306 rotates in the reverse direction. At this time, the power is transmitted to the driving arm 502, causing the driving arm 502 to drive the piston rod 3056 to descend. At this time, the piston body 3055 can push the gas in the piston cylinder 3054 into the pressure sealing cover 3052. In this way, the air pressure in the pressure sealing cover 3052 can rise. When the air pressure detected by the pressure sensor 3053 meets the set range, it proves that the bottle mouth of the plastic infusion bottle does not leak liquid. When the air pressure detected by the pressure sensor 3053 does not meet the set range, it proves that there is a gap in the bottle mouth of the plastic infusion bottle and liquid leakage will occur. In this way, the second motor 3071 drives the flipping table 3072 to rotate, causing the plastic infusion bottle to fall out from the falling port 3073.

[0070] After the detection is completed, the first motor 306 rotates forward again, so that the lifting platform 3042 rises. If the plastic infusion bottle on the leak detection platform 302 does not leak, the pressure sealing cover 3052 will come off from the mouth of the plastic infusion bottle. Similarly, the transfer turntable 3031 can rotate again to make the next group of plastic infusion bottles to be detected reach the leak detection platform, and the plastic infusion bottles on the leak detection platform are transferred to the second conveying mechanism 200 and conveyed out through the second conveying mechanism 200;

[0071] The cycle continues, and the leak detection of the plastic infusion bottles conveyed by the first conveying mechanism 100 is continuously carried out.

[0072] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0073] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A leak detection device for plastic infusion bottles, comprising a first conveying mechanism (100), a second conveying mechanism (200) and a leak detection mechanism (300). The first conveying mechanism (100) is used to convey the plastic infusion bottles to be inspected, and the second conveying mechanism (200) is used to convey the plastic infusion bottles that have passed the leak detection. It is characterized in that: A leak detection mechanism (300) is provided between the first conveying mechanism (100) and the second conveying mechanism (200). The leak detection mechanism (300) includes a mechanism frame (301), a leak detection platform (302), a transfer component (303), a lifting motion module (304), a pressure leak detection component (305), and a first motor (306). The leak detection platform (302) is provided on one side of the first conveying mechanism (100) and the second conveying mechanism (200). The mechanism frame (301) is provided on one side of the first conveying mechanism (100) and the second conveying mechanism (200). The transfer component (303) is provided on the mechanism frame (301). The lifting motion module (304) is provided on the mechanism frame (301). The lifting motion module (304) includes a lifting platform (3042) capable of realizing lifting motion. The pressure leak detection component (305) is provided on the mechanism frame (301). The pressure leak detection component (305) includes a pressure generating component (3051) capable of supplying pressure and a pressure sealing cover (3052) in pipeline cooperation with the pressure generating component (3051). A pressure sensor (3053) is fixedly connected to the pressure sealing cover (3052). The pressure sealing cover (3052) is fixedly connected to the lifting platform (3042). The pressure sealing cover (3052) corresponds to the leak detection platform (302). After the pressure sealing cover (3052) descends, it can seal the bottle mouth part of the plastic infusion bottle located on the leak detection platform (302). The first motor (306) is fixedly connected to the mechanism frame (301). The first motor (306) and the lifting motion module (304) are connected by a first transmission component (400) to realize power connection. The first motor (306) and the pressure generating component (3051) are connected by a second transmission component (500) to realize power connection. The first transmission component (400) includes a first one-way transmission part (401). The second transmission component (500) includes a second one-way transmission part (501). Under the action of the first one-way transmission part (401) and the second one-way transmission part (501), when the first motor (306) drives the lifting motion module (304) to work, the pressure generating component (3051) does not work. When the first motor (306) drives the pressure generating component (3051) to work, the lifting motion module (304) does not work. The lifting platform (3042) and the transfer component (303) are connected by a linkage component to realize power connection. The linkage component includes a third one-way transmission part (601). Under the action of the third one-way transmission part (601), when the lifting platform (3042) descends, the transfer component (303) does not work. When the lifting platform (3042) ascends, the transfer component (303) works. A defective product dropping mechanism (307) is provided on the leak detection platform (302). When the plastic infusion bottles on the leak detection platform (302) fail to pass the leak detection test, the defective product dropping mechanism (307) controls the plastic infusion bottles to drop from the leak detection platform (302).

2. The leak detection device for a plastic infusion bottle according to claim 1, wherein: The transfer component (303) includes a transfer turntable (3031) and a drive shaft (3032). The transfer turntable (3031) is rotatably connected between the first conveying mechanism (100) and the second conveying mechanism (200). The drive shaft (3032) is fixedly connected to the transfer turntable (3031). A plurality of groups of clamping grooves (3033) are arranged in a circular array on the transfer turntable (3031). One group of the clamping grooves (3033) corresponds to the first conveying mechanism (100), one group of the clamping grooves (3033) corresponds to the second conveying mechanism (200), and one group of the clamping grooves (3033) corresponds to the leak detection platform (302). The drive shaft (3032) is power-connected to the lifting platform (3042) through the linkage component. When the lifting platform (3042) rises, the transfer turntable (3031) rotates a predetermined angle, and the plastic infusion bottles on the first conveying mechanism (100) are transferred to the leak detection platform (302). The plastic infusion bottles that pass the leak detection on the leak detection platform (302) are transferred to the second conveying mechanism (200). The lifting motion module (304) further includes a sliding column (3041) and a reciprocating lead screw (3043). The sliding column (3041) is fixedly connected to the mechanism frame (301). The lifting platform (3042) is slidably connected to the sliding column (3041). The reciprocating lead screw (3043) is threadedly connected to the lifting platform (3042). The reciprocating lead screw (3043) is power-connected to the first motor (306) through the first transmission component (400).

3. The leak detection device for a plastic infusion bottle according to claim 1, characterized in that: The defective product dropping mechanism (307) includes a second motor (3071) and a flipping platform (3072). A dropping port (3073) is provided on the leak detection platform (302). The flipping platform (3072) is rotatably connected to one side of the dropping port (3073). The top surface of the flipping platform (3072) is flush with the top surface of the leak detection platform (302). The second motor (3071) is fixedly connected to the leak detection platform (302). The second motor (3071) is power-connected to the flipping platform (3072). The transfer component (303) transfers the plastic infusion bottles on the first conveying mechanism (100) to the flipping platform (3072).

4. The leak detection device for a plastic infusion bottle according to claim 2, wherein: The pressure generating component (3051) includes a piston cylinder (3054), a piston body (3055), and a piston rod (3056). The piston cylinder (3054) is fixedly connected to the mechanism frame (301). The piston body (3055) is slidably connected inside the piston cylinder (3054). The piston rod (3056) is fixedly connected to the piston body (3055). An intake pipe (3057) and an exhaust pipe (3058) are fixedly connected to the piston cylinder (3054). A first one-way valve (3059) is fixedly connected to the intake pipe (3057). A second one-way valve (30510) is fixedly connected to the exhaust pipe (3058). The exhaust pipe (3058) is connected by a pipeline to the pressure sealing cover (3052). The piston rod (3056) and the first motor (306) are power-connected through a second transmission component (500).

5. The leak detection device for a plastic infusion bottle according to claim 4, wherein: The first transmission component (400) further includes a first power input shaft A (402), a first worm (403), and a first worm gear (404). The first power input shaft A (402) is fixedly connected to the reciprocating lead screw (3043). The first worm gear (404) is fixedly connected to the first power input shaft A (402). The first worm (403) is rotatably connected to the mechanism frame (301). The first worm (403) is meshed with the first worm gear (404). A first power input shaft B (405) is fixedly connected to the first worm (403). A first one-way transmission member (401) is provided on the first power input shaft B (405). The first one-way transmission member (401) adopts a ratchet component. The first motor (306) is power-connected to the first power input shaft B (405).

6. The leak detection device for a plastic infusion bottle according to claim 5, characterized in that: The second transmission component (500) further includes a driving arm (502), a traction arm (503), a second worm (504), and a second worm gear (505). A second power input shaft A (506) is rotatably connected to the mechanism frame (301). The driving arm (502) is fixedly connected to the second power input shaft A (506). One end of the driving arm (502) is rotatably connected to the traction arm (503). One end of the traction arm (503) is rotatably connected to the piston column (3056). The second worm gear (505) is fixedly connected to the second power input shaft A (506). The second worm (504) is rotatably connected to the mechanism frame (301). The second worm (504) is meshed and connected with the second worm gear (505). A second power input shaft B (507) is rotatably connected to the mechanism frame (301). A first bevel gear (508) is fixedly connected to the second worm (504). A second bevel gear (509) is fixedly connected to the second power input shaft B (507). The first bevel gear (508) is meshed and connected with the second bevel gear (509). A second one-way transmission member (501) is provided on the second power input shaft B (507). The second one-way transmission member (501) adopts a ratchet component. The first motor (306) is power-connected to the second power input shaft B (507).

7. The leak detection device for a plastic infusion bottle according to claim 6, characterized in that: The linkage component further includes a third worm gear (602), a third worm (603), a gear (605), and a rack (606). The second worm gear (505) is fixedly connected to the driving shaft (3032). The third worm (603) is rotatably connected to the mechanism frame (301). The third worm (603) is meshed and connected with the third worm gear (602). A third power input shaft (604) is fixedly connected to the third worm (603). A third one-way transmission member (601) is provided on the third power input shaft (604). The third one-way transmission member (601) adopts a ratchet component. The gear (605) is fixedly connected to the third power input shaft (604). The gear (605) is located on one side of the power input end of the third one-way transmission member (601). The rack (606) is fixedly connected to the lifting platform (3042). When the lifting platform (3042) moves up and down, the rack (606) can drive the gear (605).

8. An air leakage detection device for a plastic infusion bottle according to claim 7, characterized in that: The power input end of the first motor (306) is power-connected to the second power input shaft B (507). A driving pulley (701) is fixedly connected to the second power input shaft B (507). The driving pulley (701) is located on one side of the power input end of the second one-way transmission member (501). A driven pulley (702) is fixedly connected to the first power input shaft B (405). The driven pulley (702) is located on one side of the power input end of the first one-way transmission member (401). The driving pulley (701) and the driven pulley (702) are connected by a transmission belt (703).

9. The leak detection device for plastic infusion bottles according to claim 3, wherein: It further includes a PLC controller and a motor driver. The motor driver is signal-connected to the first motor (306) and the second motor (3071). The PLC controller is signal-connected to the pressure sensor (3053).

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