Leak detection device for plastic infusion bottle

Abstract

The invention discloses a plastic infusion bottle leak detection device, which is mainly used for detecting the sealing performance of the opening of a plastic infusion bottle and preventing liquid leakage, and comprises a first conveying mechanism, a second conveying mechanism and a leak detection mechanism, and a transfer part in the leak detection mechanism can transfer the plastic infusion bottle conveyed by the first conveying mechanism to a leak detection platform. The lifting motion module drives the pressure sealing cover to seal a bottle opening, gas can be provided for the pressure sealing cover through the pressure generation component, the pressure sensor detects the gas pressure and judges whether the bottle opening leaks liquid or not, and if the bottle is detected to be unqualified, the defective product falling mechanism falls the bottle from the leakage detection platform. And the qualified bottles are transferred to the second conveying mechanism to be output by the transferring part, automatic operation of the device is achieved through the PLC, and the accuracy and efficiency of detection are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of leak detection devices, in particular to a leak detection device for a plastic infusion bottle. Background Art

[0002] In the medical industry, plastic infusion bottles are the main packaging containers for liquid medicines and are widely used in medical scenarios such as infusion and injection. The sealing performance of the bottle mouth is directly related to the safety, effectiveness and sterility of the medicine. Most existing plastic infusion bottles are made of one-piece injection molding, and the bottle mouth is made of hard plastic (such as polypropylene, polyethylene, etc.). Due to injection molding and bottle body inspection, the possibility of leakage of the entire bottle body is extremely low. However, since the bottle mouth needs to be sealed, the bottle mouth may not be tightly sealed, which is specifically manifested as a gap between the bottle mouth and the bottle cap or a small defect in the bottle mouth itself. If the bottle mouth is not tightly sealed, it will cause the drug liquid to leak during storage or transportation. At the same time, it may become a channel for microorganisms or external contaminants to enter the bottle, causing the drug to be contaminated and affecting the sterility and safety of the drug. At present, the leak detection methods for plastic infusion bottles mainly include manual visual inspection, water immersion leak detection and air pressure leak detection. However, these methods have the following problems: 1. Manual visual inspection: It relies on the operator’s experience, has low inspection efficiency and is prone to missed inspections, and cannot meet the needs of large-scale production; 2. Water immersion leak detection: The infusion bottle needs to be immersed in water to observe bubbles. The operation is cumbersome and may damage the bottle label. At the same time, it is impossible to detect tiny gaps. 3. Air pressure leak detection: Although the detection accuracy is high, the existing equipment is complex in structure, expensive, and has a low degree of automation, making it difficult to achieve efficient and continuous detection. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a plastic infusion bottle leak detection device which can accelerate the leak detection effect and ensure the leak detection accuracy.

[0004] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a plastic infusion bottle leak detection device, including a first conveying mechanism, a second conveying mechanism and a leak detection mechanism, the first conveying mechanism is used to convey the plastic infusion bottle to be inspected, the second conveying mechanism is used to convey the plastic infusion bottle that has been leak-proof, the leak detection mechanism is arranged 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 arranged on one side of the first conveying mechanism and the second conveying mechanism, and the first conveying mechanism and the second conveying mechanism are arranged on one side. The mechanism frame is provided with the transfer component, the mechanism frame is provided with the lifting and lowering movement module, the lifting and lowering movement module includes a lifting platform capable of realizing lifting and lowering movement, the mechanism frame is provided with the pressure leak detection assembly, the pressure leak detection assembly includes a pressure generating component capable of supplying pressure and a pressure sealing cover matched with the pipeline of the pressure generating component, the pressure sealing cover is fixedly connected with a pressure sensor, the pressure sealing cover is fixedly connected to the lifting platform, the pressure sealing cover corresponds to the leak detection platform, and the pressure sealing cover can seal the bottle mouth of the plastic infusion bottle located on the leak detection platform after descending; The leak detection platform is provided with a defective product dropping mechanism. When the plastic infusion bottle on the leak detection platform fails the leak detection, the defective product dropping mechanism controls the plastic infusion bottle to drop from the leak detection platform. The first motor is fixedly connected to the mechanism frame, and the first motor and the lifting motion module are dynamically connected through a first transmission assembly, and the first motor and the pressure generating component are dynamically connected through a second transmission assembly, the first transmission assembly includes a first one-way transmission member, and the second transmission assembly includes a second one-way transmission member. Under the action of the first one-way transmission member and the second one-way transmission member, when the first motor drives the lifting motion module to work, the pressure generating component does not work, and when the first motor drives the pressure generating component to work, the lifting motion module does not work. The lifting platform and the transfer component are dynamically connected through a linkage member, and the linkage member includes a third one-way transmission member. Under the action of the third one-way transmission member, when the lifting platform descends, the transfer component does not work, and when the lifting platform rises, the transfer component works.

[0005] In the above technical solution, the transfer component adopts the following structure: The transfer component includes a transfer turntable and a driving shaft. The transfer turntable is rotatably connected between the first conveying mechanism and the second conveying mechanism. The driving shaft is fixedly connected to the transfer turntable. The transfer turntable is provided with a plurality of groups of clamping grooves in a circular array. One group of the clamping grooves corresponds to the first conveying mechanism, one group of the clamping grooves corresponds to the second conveying mechanism, and one group of the clamping grooves corresponds to the leak detection platform. The driving shaft and the lifting platform are dynamically connected through the linkage component. When the lifting platform rises, the transfer turntable rotates by a predetermined angle, and the plastic infusion bottle on the first conveying mechanism is transferred to the leak detection platform. The plastic infusion bottle that has passed the leak detection on the leak detection platform is transferred to the second conveying mechanism.

[0006] In the above technical solution, the specific structure of the lifting motion module is: The lifting motion module also includes a sliding column and a reciprocating screw. The sliding column is fixedly connected to the mechanism frame, the lifting platform is slidably connected to the sliding column, the reciprocating screw is threadedly connected to the lifting platform, and the reciprocating screw is dynamically connected to the first motor through the first transmission assembly.

[0007] In the above technical solution, the pressure generating component adopts the following structure: 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 by a pipeline, and the piston column is dynamically connected to the first motor via a second transmission assembly.

[0008] In the above technical solution, the structure of the defective product falling mechanism is: The defective product falling mechanism includes a second motor and a turning table. A falling port is provided on the leak detection platform. One side of the falling port is rotatably connected to the turning table. The top surface of the turning table is flush with the top surface of the leak detection platform. The leak detection platform is fixedly connected to the second motor. The second motor is power-connected to the turning table. The transfer component transfers the plastic infusion bottle on the first conveying mechanism to the turning table.

[0009] In the above technical solution, the specific structure of the first transmission assembly is as follows: The first transmission assembly further includes a first power input shaft A, a first worm, and a first worm wheel. The reciprocating screw is fixedly connected to the first power input shaft A, the first power input shaft A is fixedly connected to the first worm wheel, the mechanism frame is rotatably connected to the first worm, and the first worm is meshingly connected to the first worm wheel; The first worm is fixedly connected with a first power input shaft B, the first power input shaft B is provided with the first one-way transmission component, the first one-way transmission component is a ratchet component, and the motor is connected with the first power input shaft B in power.

[0010] In the above technical solution, the specific structure of the second transmission assembly is as follows: The second transmission assembly also includes a driving arm, a traction arm, a second worm, and a second worm wheel. The mechanism frame is rotatably connected to a second power input shaft A, the second power input shaft A is fixedly connected to the driving arm, 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 column, the second power input shaft A is fixedly connected to the second worm wheel, the mechanism frame is rotatably connected to the second worm, the second worm is meshingly connected to the second worm wheel, the mechanism frame is rotatably connected to a second power input shaft B, the second worm is fixedly connected to a first bevel gear, the second power input shaft B is fixedly connected to a second bevel gear, the first bevel gear is meshingly connected to the second bevel gear, the second power input shaft B is provided with the second one-way transmission component, the second one-way transmission component adopts a ratchet component, and the motor is power-connected to the second power input shaft B.

[0011] In the above technical solution, the specific structure of the linkage component is as follows: The linkage component also includes a third worm wheel, a third worm, a gear and a rack. The second worm wheel is fixedly connected to the driving shaft, the third worm is rotatably connected to the mechanism frame, the third worm is meshingly connected to the third worm wheel, the third worm is fixedly connected to the third power input shaft, the third power input shaft is provided with the third one-way transmission component, the third one-way transmission component adopts a ratchet component, the third power input shaft is fixedly connected with the gear, the gear is located on the power input end side of the third one-way transmission component, the rack is fixedly connected to the lifting platform, and the rack can drive the gear when the lifting platform is lifted or lowered.

[0012] In the above technical solution, the power connection mode between the first motor and the second power input shaft B and the first power input shaft B is: 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, the driving pulley is located on the power input end side of the second unidirectional transmission member, a driven pulley is fixedly connected to the first power input shaft B, the driven pulley is located on the power input end side of the first unidirectional transmission member, and the driving pulley and the driven pulley are connected by a transmission belt.

[0013] In the above technical solution, in order to realize the automatic leak detection, a PLC controller and a motor driver are also included. The motor driver is connected to the first motor and the second motor signals, and the PLC controller is connected to the pressure sensor signal.

[0014] Beneficial effects of the present invention: 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. The transfer component (transfer turntable) can automatically transfer the infusion bottles from the first conveying mechanism to the leak detection platform, and transfer qualified products 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 drop port. In this way, the entire leak detection process does not require manual intervention, which significantly improves production efficiency and is suitable for large-scale industrial production; 2. The combination of pressure generating components, pressure sealing cover and pressure sensor can accurately detect the sealing of the mouth of the infusion bottle. After the mouth of the bottle is sealed by the pressure sealing cover, a predetermined air pressure is applied to the pressure sealing cover. The air pressure change is monitored by the air pressure sensor to accurately determine whether there is a gap or leakage at the mouth of the bottle. 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; 3. The device as a whole adopts the first motor to provide the required power for the lifting motion module, the pressure generating component and the transfer component, so that the device can realize the required functions through a large number of mechanical structures and reduce the power source of the device as a whole, so that the overall failure rate of the device is low and easy to program and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of another angle of the present invention; Figure 3 It is a front view structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention in the leak detection working state; Figure 5 It is a structural schematic diagram of the present invention in a non-leakage detection working state; Figure 6 It is a schematic diagram of the structure of the pressure sealing cover in the present invention; Figure 7 It is a structural schematic diagram of the pressure generating component in the present invention; Figure 8 This is a schematic diagram of the power connection structure of the first motor in the present invention; Fig. 9 It is a schematic diagram of the structure of the first motor power connection in another angle in the present invention; Fig.10 for Figure 8 Schematic diagram of the detailed structure of part a in the middle; Fig.11 for Fig. 9 Schematic diagram of the detailed structure of part b in the middle; Fig.12 for Fig. 9 Schematic diagram of the detailed structure of part c in the middle.

[0016] In the figure: 100 first conveying mechanism; 200 second conveying mechanism; 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 platform, 3043 reciprocating screw, 305 pressure leak detection assembly, 3051 pressure generating component, 3052 pressure sealing cover, 3053 pressure sensor, 3054 piston cylinder, 3055 piston body, 3056 piston column, 3057 air inlet pipe, 3058 air outlet 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 port; 400 first transmission assembly, 401 first one-way transmission member, 402 first power input shaft A, 403 first worm, 404 first worm wheel, 405 first power input shaft B; 500 second transmission assembly, 501 second one-way transmission member, 502 driving arm, 503 traction arm, 504 second worm, 505 second worm wheel, 506 second power input shaft A, 507 second power input shaft B, 508 first bevel gear, 509 second bevel gear; 600 linkage assembly, 601 third one-way transmission member, 602 third worm gear, 603 third worm, 604 third power input shaft, 605 gear, 606 rack; 701 driving pulley, 702 driven pulley, 703 transmission belt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 3 A plastic infusion bottle leak detection device comprises a first conveying mechanism 100, a second conveying mechanism 200 and a leak detection mechanism 300, wherein the first conveying mechanism 100 is used to convey the plastic infusion bottle to be inspected, and the second conveying mechanism 200 is used to convey the plastic infusion bottle that has passed the leak detection; 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 mouth of the plastic infusion bottle. 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 bottle conveyed by the first conveying mechanism 100 to the leak detection platform 302. In this embodiment, please refer to Figure 4 , Figure 5The transfer component 303 includes a transfer turntable 3031 and a drive shaft 3032, that is, the transfer turntable 3031 is rotatably connected between the first conveying mechanism 100 and the second conveying mechanism 200, and the drive shaft 3032 is fixedly connected to the transfer turntable 3031. The transfer turntable 3031 is provided with four groups of clamping grooves 3033 in a circular array, 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, so that the plastic infusion bottle conveyed by the first conveying mechanism 100 can enter the clamping grooves 3033. 33, when the driving shaft 3032 rotates a predetermined angle, the transfer turntable 3031 can be driven to rotate, so that the transfer turntable 3031 can transfer the plastic infusion bottle on the first conveying mechanism 100 to the leak detection platform 302, and the plastic infusion bottle on the leak detection platform without leakage can be synchronously transferred to the second conveying mechanism 200. At the same time, a group of clamping grooves 3033 corresponds to the first conveying mechanism 100. Under the conveying effect on the first conveying mechanism 100, the plastic bottle enters the clamping groove 3033 again, and the cycle is carried out in sequence, so that the transfer work between the first conveying mechanism 100, the leak detection platform 302 and the second conveying mechanism 200 can be realized; Furthermore, a defective product dropping mechanism 307 is further provided on the leak detection platform 302. When the plastic infusion bottle on the leak detection platform 302 fails the leak detection test, the defective product dropping mechanism 307 controls the plastic infusion bottle to fall from the leak detection platform 302. Specifically, the defective product dropping mechanism 307 includes a second motor 3071 and a turning table 3072. A falling opening 3073 is provided on the leak detection platform 302. One side of the falling opening 3073 is rotatably connected to the turning table 3072. The top surface of the turning table 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 table 3072. The transfer component 303 transfers the plastic infusion bottle on the first conveying mechanism 100 to the turning table 3072. After the turning table 3072 is driven to rotate by the second motor 3071, the plastic infusion bottle can fall out of the falling opening 3073 due to gravity. Secondly, see Figure 4-Figure 6 In order to detect the leak of the bottle mouth of the plastic infusion bottle, in this embodiment, a lifting motion module 304 is provided on the mechanism frame 301, and the lifting motion module 304 includes a sliding column 3041, a lifting platform 3042 and a reciprocating screw 3043, that is, the sliding column 3041 is fixedly connected to the mechanism frame 301, the lifting platform 3042 is slidably connected to the sliding column 3041, and the reciprocating screw 3043 is threadedly connected to the lifting platform 3042. When the reciprocating screw 3043 rotates, the lifting platform 3042 can be lifted and slid on the sliding column 3041; Furthermore, a pressure leak detection assembly 305 is also provided on the mechanism frame 301, and the pressure leak detection assembly includes a pressure generating component 3051 capable of supplying pressure and a pressure sealing cover 3052 that cooperates with the pipeline of the pressure generating component 3051, and 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 platform 3042, so that the lifting platform 3042 can drive the pressure sealing cover 3052 to move up and down, and the pressure sealing cover 3052 corresponds to the leak detection platform 302, and when the pressure sealing cover 3052 is lowered, it can be aligned with the leak detection platform The mouth of the plastic infusion bottle on 302 is sealed, and 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 mouth of the bottle. If the mouth of the bottle is completely sealed and there is no gap (no leakage), the air pressure detected by the pressure sensor 3053 is within a reasonable range. If the mouth of the bottle is not completely sealed and there is a gap (leakage may occur), the input gas will enter the inside of the plastic infusion bottle through the gap. In addition, the air pressure will be lower than that of the sealed one, so the air pressure detected by the air pressure sensor is not within a reasonable range. For further information, see Figure 7-Figure 12 In this embodiment, the mechanism frame 301 is also fixedly connected with a first motor 306, and the first motor 306 provides the required power for the leak detection work, wherein the first motor 306 and the reciprocating screw 3043 are connected in power through the first transmission assembly 400, and the first transmission assembly 400 includes a first unidirectional transmission member 401, a first power input shaft A402, a first worm 403, and a first worm wheel 404, that is, the reciprocating screw 3043 is fixedly connected with the first power input shaft A402, the first power input shaft A402 is fixedly connected with the first worm wheel 404, and the mechanism frame 301 is rotatably connected with the first worm 403, and the first worm 403 is meshingly connected with the first worm wheel 404; The first worm 403 is fixedly connected with a first power input shaft B405, and the first power input shaft B405 is provided with a first one-way transmission member 401. The first one-way transmission member 401 adopts a ratchet component, and the motor is connected to the first power input shaft B405 by power. In this way, when the motor rotates forward, under the action of the first one-way transmission member 401, the power can be transmitted to the first worm 403, and then the first worm 403 drives the first worm wheel 404 to rotate, which also makes the first power input shaft A402 drive the reciprocating screw 3043 to rotate. At this time, the lifting platform 3042 generates a lifting motion, and the self-locking effect of the worm and the worm wheel can be used to ensure that the lifting platform 3042 is in a stable state after the movement. Furthermore, in this embodiment, the pressure generating component 3051 adopts the following structure: 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 in the piston cylinder 3054, the piston body 3055 is fixedly connected to the piston rod 3056, the piston cylinder 3054 is fixedly connected to an air inlet pipe 3057 and an air outlet pipe 3058, the air inlet pipe 3057 is fixedly connected to a first non-return valve 3059, and the air outlet pipe 3058 is fixedly connected to the first non-return valve 3059. A second one-way valve 30510 is fixedly connected, and the gas outlet pipe 3058 is connected to the pressure sealing cover 3052 by a pipeline. When the piston column 3056 performs a linear motion, the piston body 3055 can be raised or lowered. When the piston body 3055 is lowered, the gas inside the piston cylinder 3054 can be pushed into the pressure sealing cover 3052, thereby providing the required detection gas. When the piston body 3055 is raised, the external gas can be sucked into the piston cylinder 3054 for next use. Furthermore, the piston rod 3056 is connected to the first motor 306 through the second transmission assembly 500, and 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, the driving arm 502 is fixedly connected to the second power input shaft A506, and 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 rod 3056, the second power input shaft A506 is fixedly connected to the second worm gear 505, the mechanism frame 301 is rotatably connected to the second worm 504, the second worm 504 is meshed with the second worm gear 505, the mechanism frame 301 is rotatably connected to the second power input shaft B507, the second worm 504 is fixedly connected to the first bevel gear 508, the second power input shaft B507 is fixedly connected to the second bevel gear 509, The first bevel gear 509 is meshed with the second bevel gear 509, and the 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 motor is connected to the second power input shaft B507. When the second motor 3071 rotates in the opposite direction, the power can be transmitted to the second worm 504 under the action of the second one-way transmission member 501, and then the second worm 504 drives the second worm gear 505 to rotate, and then the power is transmitted to the second power input shaft A506. At this time, the driving arm 502 can rotate, and 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, the driving arm 502 drives the piston column 3056 to descend by the same distance each time, which makes the piston body 3055 push the gas in the piston cylinder 3054 into the same gas capacity in the pressure sealing cover 3052 each time, thereby ensuring the accuracy of each detection; 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 member 3051 does not work, and when the first motor 306 drives the pressure generating member 3051 to work, the lifting motion module 304 does not work; Further disclosed, the above-mentioned lifting platform 3042 and the transfer component 303 are also connected to each other through a linkage component. In the embodiment, the linkage component includes a third one-way transmission component 601, a third worm wheel 602, a third worm 603, a gear 605, and a rack 606, that is, the second worm wheel 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 with the third worm wheel 602, the third worm 603 is fixedly connected to the third power input shaft 604, the third one-way transmission component 601 is provided on the third power input shaft 604, the third one-way transmission component 601 adopts a ratchet component, the third power input shaft 604 is fixedly connected to the gear 605, and the gear 605 is located on the power input end side of the third one-way transmission component 601, and the lifting platform 3042 is fixedly connected to the rack 606. When the lifting platform 3042 performs a lifting movement, the rack 606 06 can drive the gear 605, so that 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, and when the lifting platform 3042 drives the rack 606 to rise, 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 wheel 602 to rotate, so that the transfer turntable 3031 rotates to achieve the working effect of the transfer component 303, that is, when the lifting platform 3042 rises, the transfer turntable 3031 rotates a predetermined angle to transfer the plastic infusion bottle on the first conveying mechanism 100 to the leak detection platform 302, and the plastic infusion bottle that has been leak-proof on the leak detection platform 302 is transferred to the second conveying mechanism 200; Furthermore, 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 at 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 at 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 via a transmission belt 703; Finally, in order to realize automated leak detection, a PLC controller and a motor driver are also included. The motor driver is connected to the first motor 306 and the second motor 3071 by signals, and the PLC controller is connected to the pressure sensor 3053 by signals. 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 reverse. When the pressure data is not within the set range, the PLC controller controls the second motor 3071 to work, so as to realize the unloading of defective products.

[0019] In summary, the present embodiment discloses a plastic infusion bottle leak detection device, which is mainly used to detect the sealing of the bottle mouth of the plastic infusion bottle to prevent the plastic infusion bottle from leaking and affecting the use. Specifically, the plastic infusion bottle can be transported by the first conveying mechanism 100, so that a group of plastic infusion bottles are located in the clamping groove 3033 of the transfer turntable 3031, and then the first motor 306 rotates in the forward direction to drive the reciprocating screw 3043 to rotate. At this time, the lifting platform 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 makes the transfer turntable 3031 rotate, so that the transfer turntable 3031 can transfer the plastic infusion bottle to the predetermined position of the leak detection platform 302; When the first motor 306 continues to rotate in the forward direction to drive the reciprocating screw 3043 to rotate, the lifting platform 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; The first motor 306 rotates in the opposite direction. At this time, the power is transmitted to the driving arm 502, so that the driving arm 502 drives the piston column 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, so that 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. When the air pressure detected by the pressure sensor 3053 does not meet the set range, it proves that the bottle mouth of the plastic infusion bottle has a gap and leakage will occur. In this way, the second motor 3071 drives the turning table 3072 to rotate, so that the plastic infusion bottle falls out from the drop opening 3073. When 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 be removed from the bottle mouth of the plastic infusion bottle. Similarly, the transfer turntable 3031 can be rotated again, so that the next group of plastic infusion bottles to be detected arrives on 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 by the second conveying mechanism 200; The process is circulated in sequence to continuously check for leaks on the plastic infusion bottles transported by the first transport mechanism 100.

[0020] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A plastic infusion bottle leak detection device, comprising a first conveying mechanism (100), a second conveying mechanism (200) and a leak detection mechanism (300), wherein the first conveying mechanism (100) is used to convey a plastic infusion bottle to be inspected, and the second conveying mechanism (200) is used to convey a plastic infusion bottle that has passed the leak detection, and characterized in that: The leak detection mechanism (300) is provided between the first conveying mechanism (100) and the second conveying mechanism (200), and the leak detection mechanism (300) comprises a mechanism frame (301), a leak detection platform (302), a transfer component (303), a lifting and lowering movement 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 and lowering movement module (304) is provided on the mechanism frame (301); the lifting and lowering movement module (304) is provided on the mechanism frame (301); The movable module (304) includes a lifting platform (3042) capable of achieving lifting movement. The mechanism frame (301) is provided with the pressure leak detection assembly (305). The pressure leak detection assembly (305) includes a pressure generating component (3051) capable of supplying pressure and a pressure sealing cover (3052) matched with a pipeline of the pressure generating component (3051). The pressure sealing cover (3052) is fixedly connected to a pressure sensor (3053). 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) is lowered, it can seal the bottle mouth of the plastic infusion bottle located on the leak detection platform (302); The leak detection platform (302) is provided with a defective product dropping mechanism (307). When a plastic infusion bottle on the leak detection platform (302) fails the leak detection test, the defective product dropping mechanism (307) controls the plastic infusion bottle to fall from the leak detection platform (302).

2. A plastic infusion bottle leak detection device according to claim 1, characterized in that: The first motor (306) is fixedly connected to the mechanism frame (301); the first motor (306) and the lifting motion module (304) are connected in power via a first transmission assembly (400); the first motor (306) and the pressure generating component (3051) are connected in power via a second transmission assembly (500); the first transmission assembly (400) includes a first one-way transmission member (401); the second transmission assembly (500) includes a second one-way transmission member (501); under the action of the first one-way transmission member (401) and the second one-way transmission member (501), the first motor (306) is connected in power to the pressure generating component (3051); 6) When the lifting and lowering motion module (304) is driven 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 and lowering motion module (304) does not work; the lifting platform (3042) and the transfer component (303) are connected to each other by a linkage component, wherein the linkage component includes a third one-way transmission component (601); when the lifting platform (3042) descends, the transfer component (303) does not work under the action of the third one-way transmission component (601); when the lifting platform (3042) rises, the transfer component (303) works.

3. A plastic infusion bottle leak detection device according to claim 2, characterized in that: The transfer component (303) comprises 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), and one group of the clamping grooves (3033) corresponds to the first conveying mechanism (100). The second conveying mechanism (200) corresponds to a group of the clamping grooves (3033) corresponding to the leak detection platform (302), the driving shaft (3032) and the lifting platform (3042) are connected in power through the linkage component, when the lifting platform (3042) rises, the transfer turntable (3031) rotates a predetermined angle, the plastic infusion bottles on the first conveying mechanism (100) are transferred to the leak detection platform (302), and the plastic infusion bottles on the leak detection platform (302) that have passed the leak detection are transferred to the second conveying mechanism (200); The lifting motion module (304) further comprises a sliding column (3041) and a reciprocating 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 lifting platform (3042) is threadedly connected to the reciprocating screw (3043); the reciprocating screw (3043) and the first motor (306) are connected in power via the first transmission assembly (400).

4. A plastic infusion bottle leak detection device according to claim 3, characterized in that: The pressure generating component (3051) comprises 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 air inlet pipe (3057) and an air outlet pipe (3058) are fixedly connected to the piston cylinder (3054); a first one-way valve (3059) is fixedly connected to the air inlet pipe (3057); a second one-way valve (30510) is fixedly connected to the air outlet pipe (3058); a pipeline is connected between the air outlet pipe (3058) and the pressure sealing cover (3052); and the piston column (3056) and the first motor (306) are connected in power via a second transmission assembly (500).

5. A plastic infusion bottle leak detection device according to claim 1, characterized in that: The defective product dropping mechanism (307) comprises a second motor (3071) and a turning table (3072); a dropping opening (3073) is provided on the leak detection platform (302); one side of the dropping opening (3073) is rotatably connected to the turning table (3072); the top surface of the turning table (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 turning table (3072); and the transfer component (303) transfers the plastic infusion bottle on the first conveying mechanism (100) to the turning table (3072).

6. A plastic infusion bottle leak detection device according to claim 4, characterized in that: The first transmission assembly (400) further comprises a first power input shaft A (402), a first worm (403), and a first worm wheel (404); the first power input shaft A (402) is fixedly connected to the reciprocating screw (3043); the first power input shaft A (402) is fixedly connected to the first worm wheel (404); the first worm (403) is rotatably connected to the mechanism frame (301); the first worm (403) is meshingly connected to the first worm wheel (404); The first worm gear (403) is fixedly connected to a first power input shaft B (405), the first power input shaft B (405) is provided with the first one-way transmission member (401), the first one-way transmission member (401) is a ratchet member, and the motor is power-connected to the first power input shaft B (405).

7. A plastic infusion bottle leak detection device according to claim 6, characterized in that: The second transmission assembly (500) further comprises a driving arm (502), a traction arm (503), a second worm (504), and a second worm wheel (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 wheel (505) is fixedly connected to the second power input shaft A (506); the second worm (505) is rotatably connected to the mechanism frame (301); 04), the second worm (504) is meshingly connected with the second worm wheel (505), the mechanism frame (301) is rotatably connected with a second power input shaft B (507), the second worm (504) is fixedly connected with a first bevel gear (508), the second power input shaft B (507) is fixedly connected with a second bevel gear (509), the first bevel gear (508) is meshingly connected with the second bevel gear (509), the second power input shaft B (507) is provided with the second one-way transmission member (501), the second one-way transmission member (501) adopts a ratchet member, and the motor is power-connected with the second power input shaft B (507).

8. A plastic infusion bottle leak detection device according to claim 7, characterized in that: The linkage component further comprises a third worm wheel (602), a third worm (603), a gear (605), and a rack (606); the second worm wheel (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 meshingly connected to the third worm wheel (602); the third worm (603) is fixedly connected to a third power input shaft (604); and the third power input shaft (606) is fixedly connected to the third worm wheel (602). 04) is provided with the third one-way transmission member (601), 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 the power input end side of the third one-way transmission member (601), the rack (606) is fixedly connected to the lifting platform (3042), and when the lifting platform (3042) performs a lifting movement, the rack (606) can drive the gear (605).

9. A plastic infusion bottle leak detection device 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 via a transmission belt (703).

10. A plastic infusion bottle leak detection device according to claim 1, characterized in that: It also includes a PLC controller and a motor driver, wherein the motor driver is connected to the first motor (306) and the second motor (3071) by signals, and the PLC controller is connected to the pressure sensor (3053) by signals.

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