Air tightness detection device for polyester-polyethylene glycol copolymer bottle

Abstract

The utility model discloses a polyester-polyethylene glycol copolymer bottle air tightness detection device which comprises a platform, the platform is slidably connected with conveying belts, the conveying belts are symmetrically arranged and perpendicular to the two sides of the platform, the platform is slidably connected with a supporting assembly capable of moving up and down, and the supporting assembly can alternately support bottle bottoms. The platform is slidably connected with a pressing plate capable of moving up and down, the pressing plate can enable the conveying belts to simultaneously move away from each other or move towards each other, the pressing plate is slidably connected with an air tightness detection assembly through an elastic piece, the pressing plate is fixedly connected with an electromagnet used for marking, and the electromagnet can be matched with the air tightness detection assembly. According to the utility model, in the detection process of the polyester-polyethylene glycol copolymer bottle, the problem that an area which needs to be covered by a support cannot be detected due to detection needs can be avoided, the accuracy of a detection result is improved, water stain residues can be avoided, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bottle testing technology, specifically to a device for testing the airtightness of polyester-polyethylene glycol copolymer bottles. Background Technology

[0002] Polyester-polyethylene glycol copolymers are a class of block or graft copolymers formed by chemically bonding polyester segments (such as polycaprolactone, polycyclohexanediol terephthalate, etc.) with polyethylene glycol (PEG). Their unique amphiphilic structure makes them of great application value in fields such as biomedicine and materials science.

[0003] A search revealed that patent CN 220625648 U discloses a medicine bottle detection device, including a glass box. A detachable sealing cap is mounted on the top of the glass box. A vacuum pump is fixedly mounted on one side of the glass box, communicating with the interior of the glass box. A drive unit is fixedly mounted on the bottom of the glass box, and a mounting plate is located inside the glass box, cooperating with the drive unit. Rotating shafts are fixedly mounted on both sides of the mounting plate, with gears fixedly mounted at the ends of the shafts furthest from the mounting plate. Racks are symmetrically arranged on the side walls of the glass box, meshing with corresponding gears. A fan is fixedly mounted on the side walls of the glass box.

[0004] However, the device still has the following problems in use: the detection of the bottle is not complete, the bottle covered by the clamping part cannot be detected, which affects the accuracy of the detection results; when the bottle is immersed in water, water stains remain on the bottle during the air drying process, which increases the cleaning of the bottle and affects production efficiency. Utility Model Content

[0005] To address the issues of insufficient testing and water residue in polyester-polyethylene glycol copolymer bottles in the prior art, this invention provides a device for testing the airtightness of polyester-polyethylene glycol copolymer bottles, thereby resolving these problems.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] This invention discloses an airtightness testing device for polyester-polyethylene glycol copolymer bottles, comprising a platform slidably connected to a conveyor belt, the conveyor belt being symmetrically arranged perpendicular to both sides of the platform, a support assembly slidably connected to the platform capable of moving up and down, the support assembly being capable of alternately supporting the bottom of the polyester-polyethylene glycol copolymer bottle, a pressure plate slidably connected to the platform capable of moving up and down, the pressure plate being capable of causing the conveyor belt to move simultaneously away from or towards each other, an airtightness testing component slidably connected to the pressure plate via an elastic element, and at least one set of electromagnets for marking being fixedly connected to the pressure plate, the electromagnets being capable of cooperating with the airtightness testing component.

[0008] Preferably, the support assembly includes at least one set of lower support rings, the lower end of which is fixedly connected to a second cylinder, and a center plate is concentrically slidably disposed on the lower support rings, the lower end of which is fixedly connected to a first cylinder.

[0009] Preferably, a rubber layer is provided at the upper end of the center plate, a micro switch is fixed on the center plate, and an inlay plate is fixed on the rubber layer, the inlay plate being able to cooperate with the micro switch.

[0010] Preferably, the airtightness detection component includes at least one set of upper cover plates, the upper cover plates are slidably connected to the pressure plate by a first spring, the upper cover plates are fixedly connected to an air guide tube, and the air guide tube is slidably connected to an air pipe.

[0011] Preferably, the upper end of the air guide tube is slidably connected to the pressure plate, and a valve core is provided at the upper end of the air guide tube. The valve core can cooperate with the pressure plate to control the opening and closing of the air passage.

[0012] Preferably, the pressure plate is fixedly connected to a through pipe, and a metal plate is slidably connected inside the pressure plate through an elastic element. The pressure plate is also provided with a conductive post that cooperates with the metal plate. The metal plate can cooperate with the through pipe, and the lower end of the through pipe passes through the upper cover plate.

[0013] Preferably, the pressure plate is provided with inclined grooves at both ends, the upper end of the conveyor belt is fixedly connected with a vertical rod, the vertical rod is fixedly connected with a guide pin, and the guide pin is slidably placed in the inclined groove.

[0014] Preferably, the platform is fixedly connected to an electric actuator, and the movable end of the electric actuator is fixedly connected to the pressure plate.

[0015] Preferably, a one-way valve is provided between the air guide tube and the air passage.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. By setting up the first and second cylinders, the lower support plate and the center plate are driven to alternately support the polyester-polyethylene glycol copolymer bottle, which avoids the inability to detect the supported coverage area due to testing needs, and improves the accuracy of the test results.

[0018] 2. By cooperating with the upper cover plate and the air guide pipe and through pipe, air is supplied through the air pipe to realize the air pressure holding test of the polyester-polyethylene glycol copolymer bottle, which can avoid water stains and improve production efficiency.

[0019] 3. By using metal sheets, conductive pillars, and electromagnets, the electromagnets can mark the bottles when the pressure drops due to defects, facilitating subsequent identification and ensuring the safety of medicines stored thereafter. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a front view structural diagram of the present invention;

[0023] Figure 3 This utility model Figure 2 A schematic diagram of the A-A section structure;

[0024] Figure 4 This utility model Figure 3 Enlarged view of point B;

[0025] Figure 5 This utility model Figure 3 Enlarged diagram of point C.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Platform; 2. Conveyor belt; 3. Vertical rod; 4. Guide pin; 5. Pressure plate; 6. Electric actuator; 7. Air pipe; 8. Electromagnet; 9. First cylinder; 10. Top cover plate; 11. Air guide pipe; 12. Through pipe; 13. Rubber layer; 14. Center plate; 15. Second cylinder; 16. Lower support ring; 17. Valve core; 18. One-way valve; 19. Metal plate; 20. Conductive column; 21. Micro switch; 22. Inlay plate; 23. Inclined groove. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] Example 1:

[0030] like Figure 1 - Figure 5As shown in the figure, this embodiment proposes a device for testing the airtightness of polyester-polyethylene glycol copolymer bottles, including a platform 1. The platform 1 is slidably connected to a conveyor belt 2, which is symmetrically arranged on both sides perpendicular to the platform 1. When the conveyor belt 2 rotates, it can transfer the polyester-polyethylene glycol copolymer bottles to be tested onto the platform 1. A control box is fixed on the platform 1, and the control box contains a microcontroller for controlling the testing device. The control mechanism contained in the conveyor belt 2 is connected to the microcontroller. The area where the polyester-polyethylene glycol copolymer bottles to be tested are stored can achieve uniform spacing of the polyester-polyethylene glycol copolymer bottles by intermittent feeding, which facilitates the conveyor belt 2 to transfer the polyester-polyethylene glycol copolymer bottles to a suitable area.

[0031] Specifically, intermittent feeding technology is a mature non-standard control technology in the market. In actual production, it is used as a supporting technology for production lines. It is well-developed and can be designed with the technical parameters required for production as needed.

[0032] Specifically, conveyor belt 2 is a mature product in the market. It is a mature product consisting of a conveyor belt, drive mechanism, control mechanism, channeling mechanism (optional) and sensors (optional). It is mainly used in production lines for food, beverage, pharmaceutical, daily chemical, electronics and electrical assembly, and can be customized according to customer requirements.

[0033] Specifically, the sliding block at the bottom of the conveyor belt 2, which is used for support, and the auxiliary fixing block on the platform 1 are connected by a T-shaped structure. Alternatively, a linear guide rail can be used to replace the T-shaped structure. Both are mature existing mechanical designs and can enable the conveyor belts 2 to move smoothly away from or towards each other, that is, the symmetrically arranged conveyor belts 2 can move towards or away from the center at the same time.

[0034] Specifically, a single-chip microcomputer is an integrated circuit chip, a mature product on the market. It is a small but complete microcomputer system that integrates a central processing unit (CPU) with data processing capabilities, random access memory (RAM), read-only memory (ROM), various I / O ports and interrupt systems, timers / counters, and other functions (and may also include display driver circuits, pulse width modulation circuits, analog multiplexers, A / D converters, etc.) onto a single silicon chip using very large-scale integrated circuit technology. It features small size, high integration, simple structure, reliable performance, and modular application, and is widely used in the field of industrial control through corresponding control programs.

[0035] A vertical rod 3 is fixedly connected to the upper end of the conveyor belt 2, and a guide pin 4 is fixedly connected to the vertical rod 3. An electric push rod 6 is fixedly connected to the platform 1 through an auxiliary support frame. The electric push rod 6 is connected to a microcontroller through a wire. A pressure plate 5 is fixedly connected to the movable end of the electric push rod 6. The pressure plate 5 is located above the platform 1. Inclined grooves 23 are provided at both ends of the pressure plate 5. The guide pin 4 is slidably placed in the inclined grooves 23. When the pressure plate 5 moves up and down, the conveyor belt 2 can move simultaneously away from each other or towards each other through the inclined grooves 23 and with the cooperation of the guide pin 4.

[0036] Specifically, when the pressure plate 5 moves downward, the symmetrical conveyor belt 2 moves outward synchronously through the inclined chute 23; when the pressure plate 5 moves upward, the symmetrical conveyor belt 2 moves inward synchronously.

[0037] Specifically, the electric linear actuator 6 is a mature product on the market, and can be purchased from the market according to design requirements. The electric linear actuator, also known as a linear actuator, is an electric drive device that converts the rotary motion of an electric motor into the linear reciprocating motion of a linear actuator. It can be used as an actuator in various simple or complex processes to achieve remote control, centralized control or automatic control.

[0038] At least one set of upper cover plates 10 are slidably connected to the pressure plate 5 via a first spring. The upper end of the first spring is connected to the pressure plate 5, and the lower end of the first spring is connected to the upper cover plate 10. An air guide pipe 11 is fixedly connected to the upper cover plate 10. The upper end of the air guide pipe 11 extends to the pressure plate 5 and can slide relative to the pressure plate 5. A valve core 17 is slidably connected to the upper end of the air guide pipe 11 via a second spring. The lower end of the second spring is connected to the air guide pipe 11, and the upper end of the second spring is connected to the valve core 17. The air guide pipe 11 and the valve core 17 are provided with staggered air holes. The valve core 17 and the air guide pipe 11 can slide relative to the pressure plate 5. In conjunction with the control of the gas path, the upper end of the pressure plate 5 is connected to the gas pipe 7. The gas pipe 7 is connected to the gas supply station for testing through an auxiliary pipe. The gas pipe 7 is provided with several branch gas channels in the pressure plate 5. The branch gas channels can be connected to the gas guide pipe 11. A one-way valve 18 is also provided between the gas guide pipe 11 and the branch gas channels of the gas path 7. The one-way valve 18 can ensure that the pressure is maintained during the testing of the polyester-polyethylene glycol copolymer bottle. If the adjacent polyester-polyethylene glycol copolymer bottle is defective, the gas in the bottle will not flow into the adjacent bottle, thus avoiding the synchronous drop in the gas pressure in the bottle and thus avoiding testing errors.

[0039] Specifically, the top cover 10 is covered with a rubber plate for auxiliary sealing during the inspection of the polyester-polyethylene glycol copolymer bottle.

[0040] Specifically, the gas supply station and the one-way valve 18 are both mature products on the market and can be purchased according to needs. The gas supply station is equipped with a pressure gauge, which is connected to the microcontroller via a wire. When the set pressure is reached, the microcontroller will stop the gas supply station and maintain the pressure.

[0041] Specifically, when the pressure plate 5 moves downward, the upper cover plate 10 contacts the bottle opening of the polyester-polyethylene glycol copolymer bottle, and under the resistance of the polyester-polyethylene glycol copolymer bottle, the upper cover plate 10 compresses the first spring and moves upward, causing the valve core 17 to slide inside the air guide tube 11 under the action of the pressure plate 5, so that the air guide tube 11 is connected to the air passage 7 through the valve core 17. The gas in the gas supply station enters the polyester-polyethylene glycol copolymer bottle through the air passage 7. When the set pressure is reached, the microcontroller controls the gas supply station to stop supplying gas and maintain the pressure, and completes the detection of the polyester-polyethylene glycol copolymer bottle. After the detection is completed, the pressure plate 5 moves upward, and the valve core 17 closes the air passage 7 and the air guide tube 11 under the action of the second spring.

[0042] A pressure plate 5 is fixedly connected to a through pipe 12. The lower end of the through pipe 12 passes through the upper cover plate 10 and can communicate with the internal space of the polyester-polyethylene glycol copolymer bottle. A metal plate 19 is slidably connected to the pressure plate 5 via a third spring. The metal plate 19 slides horizontally. One end of the third spring is connected to the pressure plate 5, and the other end of the third spring is connected to the metal plate 19. The pressure plate 5 is also provided with conductive posts 20 that cooperate with the metal plate 19. The conductive posts 20 are located on the side away from the through pipe 12. There are two sets of conductive posts 20, and each set of conductive posts 20 is connected to a conductive... The wires connected to the conductive post 20 are connected to the microcontroller. With the cooperation of the metal plate 19, the wires separated by the conductive post 20 can form a circuit and send a signal to the microcontroller. The metal plate 19 can cooperate with the through pipe 12. The pressure plate 5 is fixedly connected to at least one set of electromagnets 8 for marking. The electromagnets 8 are connected to the microcontroller through wires. An object such as a marker pen is fixed at one end of the working shaft of the electromagnet 8 near the end of the polyester-polyethylene glycol copolymer bottle. The object can mark the defective polyester-polyethylene glycol copolymer bottle.

[0043] Specifically, when the pressure plate 5 drives the upper cover plate 10 to contact the polyester-polyethylene glycol copolymer bottle and gas is supplied, the gas inside the polyester-polyethylene glycol copolymer bottle pushes the metal plate 19 to compress the third spring through the pipe 12 and contacts the conductor post 20. When the pressure is maintained for testing, if the polyester-polyethylene glycol copolymer bottle is defective and leaking, the gas pressure inside the bottle will drop, and the metal plate 19 will separate from the conductor post 20 under the action of the third spring, and transmit the signal to the microcontroller. At this time, the microcontroller controls the electromagnet 8 to work and marks the defective polyester-polyethylene glycol copolymer bottle. If the bottle is intact, the pressure is maintained for the entire testing time. When the pressure plate 5 rises, the metal plate 19 separates from the conductor post 20. At this time, the microcontroller will not send a signal to the electromagnet 8.

[0044] Specifically, electromagnet 8 is a mature product on the market, and can be purchased according to needs. Electromagnet 8 is connected to a power source, which is not shown in the diagram.

[0045] Platform 1 is slidably connected with at least one set of lower support rings 16. The lower end of the lower support ring 16 is fixedly connected to a second cylinder 15. The lower support ring 16 is concentrically slidably provided with a center plate 14. The lower end of the center plate 14 is fixedly connected to a first cylinder 9. The first cylinder 9 and the second cylinder 15 can realize that the corresponding center plate 14 and lower support ring 16 alternately support the bottom of the bottle. The upper end of the center plate 14 is provided with a rubber layer 13. The center plate 14 is fixed with a micro switch 21. The rubber layer 13 is fixed with an inlay plate 22. The inlay plate 22 can cooperate with the micro switch 21. The micro switch 21 is connected to the microcontroller through a wire.

[0046] Specifically, when inspecting the polyester-polyethylene glycol copolymer bottle, the total inspection time is set to T. The electric push rod 6 lowers the pressure plate 5, and simultaneously, the conveyor belt 2 moves away from the polyester-polyethylene glycol copolymer bottle via the inclined chute 23. The second cylinder 15 provides support for the polyester-polyethylene glycol copolymer bottle through the lower support ring 16. The lower support ring 16 and the pressure plate 5 fix and inspect the polyester-polyethylene glycol copolymer bottle. When the microcontroller times out to T / 2, the microcontroller controls the first cylinder 9 to push the center plate 14 upward. The rubber layer 13 contacts and deforms with the bottom of the polyester-polyethylene glycol copolymer bottle, causing the inlay plate 22 to... When microswitch 21 is activated, it sends a signal to the microcontroller to control the second cylinder 15 to retract, causing the lower support ring 16 to disengage from the bottom of the polyester-polyethylene glycol copolymer bottle. The remaining time T / 2 is used to continue detecting the polyester-polyethylene glycol copolymer bottle. When the total detection time T is reached, the second cylinder 15 resets. After the second cylinder 15 resets, the first cylinder 9 begins to reset. After the first cylinder 9 resets, the lower support ring 16 and the rubber layer 13 can remain flush with the upper surface of the platform 1. The microcontroller then executes subsequent actions, and finally the polyester-polyethylene glycol copolymer bottle is moved out of the platform 1 by the conveyor belt 2.

[0047] Specifically, in the initial state, the lower support ring 16 and the rubber layer 13 remain flush with the upper surface of the platform 1.

[0048] Specifically, the micro switch 21 is a mature product on the market, and can be selected according to needs. Micro switches, also known as sensitive switches, have tiny contact gaps and quick-acting mechanisms. They are small in size and are contact mechanisms that use a specified stroke and force to perform switching actions. Specifically, external mechanical force acts on a spring plate through a transmission element, causing the fixed contact and moving contact at its end to quickly connect or disconnect. When the force on the transmission element is removed, the spring plate generates a reverse action force to complete the instantaneous reset. It has the characteristics of small contact gap, short operating stroke, low actuation force, and rapid switching. It is widely used in electronic equipment, instruments, mining, power systems, electrical equipment, aerospace and other fields.

[0049] Specifically, the first cylinder 9 and the second cylinder 15 are both mature products on the market, and are connected to an air source station via auxiliary pipelines. The air source station is also a mature product on the market and is not shown in the diagram. The auxiliary pipelines of the first cylinder 9 and the second cylinder 15 are both connected to solenoid valves. The solenoid valves can control the extension and retraction of the cylinder pistons. The solenoid valves are pneumatic component accessories and are mature accessory products. The solenoid valves are connected to the microcontroller via wires, which is a mature control circuit technology on the market.

[0050] Specifically, the first cylinder 9 and the second cylinder 15 are also equipped with a common cylinder accessory—a cylinder magnetic switch, also known as a magnetic induction switch. This is existing technology and is not shown in the figure. It detects the piston position by changing the magnetic field and outputs an electrical signal. Specifically, it detects the position of the magnetic ring inside the cylinder. When the piston moves to the switch position, the magnetic effect of the magnetic ring will cause the switch to close automatically. When the magnetic ring leaves the magnetic switch, the contact will open automatically. This working principle allows the cylinder magnetic induction switch to accurately detect the piston position, thereby realizing the corresponding control of the solenoid valve.

[0051] Specifically, this utility model is equipped with an auxiliary power supply. The electric actuator 6, electromagnet 8, auxiliary gas supply station, gas source station and microcontroller mentioned in this device are all connected to the auxiliary power supply through wires.

[0052] Working principle and usage process of this utility model:

[0053] S1: The polyester-polyethylene glycol copolymer bottle to be tested is transferred to the platform 1 via the conveyor belt 2 and is located on the corresponding lower support ring 16. The microcontroller controls the conveyor belt 2 to stop rotating and controls the electric push rod 6 to lower the pressure plate 5.

[0054] S2: When the pressure plate 5 descends, the conveyor belt 2 moves outward synchronously, disengaging from contact with the polyester-polyethylene glycol copolymer bottle;

[0055] As the pressure plate 5 continues to descend, the upper cover plate 10 contacts the bottle mouth of the polyester-polyethylene glycol copolymer bottle. Under the action of the lower support ring 16, the upper cover plate 10 moves upward and compresses the first spring. The upper cover plate 10 drives the gas guide tube 11 to move upward synchronously. After the valve core 17 contacts the pressure plate 5, it compresses the second spring, opening the channel between the gas guide tube 11 and the gas pipe 7. The gas from the gas supply station enters the polyester-polyethylene glycol copolymer bottle, causing the gas pressure inside the bottle to gradually increase.

[0056] As the gas enters the bottle, the gas pressure gradually increases, and the metal plate 19 is pushed towards the conductive post 20 through the tube 12, thus compressing the third spring.

[0057] When the internal pressure of the polyester-polyethylene glycol copolymer bottle reaches the set value, the gas supply station stops supplying gas and maintains the pressure, while the metal plate 19 comes into contact with the conductive post 20.

[0058] S3: According to the total detection time T set in the microcontroller, when the microcontroller counts to T / 2, the microcontroller controls the first cylinder 9 to push the center plate 14 upward. When the micro switch 21 works under the resistance of the bottle bottom, the microcontroller causes the second cylinder 15 to drive the lower support ring 16 to disengage from the bottle bottom according to the feedback signal, thus completing the remaining T / 2 detection time for the polyester-polyethylene glycol copolymer bottle.

[0059] When the polyester-polyethylene glycol copolymer bottle is defect-free, the microcontroller will complete the entire pressure holding detection time T. When the pressure plate 5 rises, the metal plate 19 will separate from the conductive post 20. At this time, the microcontroller will not send a signal to the electromagnet 8.

[0060] When a polyester-polyethylene glycol copolymer bottle is defective, the air pressure inside the bottle drops, and the metal plate 19 separates from the conductive post 20 under the action of the third spring, transmitting a signal to the microcontroller. At this time, the microcontroller controls the electromagnet 8 to work and mark the defective polyester-polyethylene glycol copolymer bottle.

[0061] S4: After the test is completed, the microcontroller controls the second cylinder 15 to reset first. After the second cylinder 15 is reset, the first cylinder 9 is reset. After the first cylinder 9 is reset, the electric push rod 9 is reset. The electric push rod 9 drives the pressure plate 5 to rise, so that the upper cover plate 10 gradually separates from the contact with the polyester-polyethylene glycol copolymer bottle.

[0062] At the same time, the valve core 17 is reset under the action of the second spring, which can prevent the gas in the air pipe 7 from escaping;

[0063] Simultaneously, conveyor belt 2 moves synchronously towards the polyester-polyethylene glycol copolymer bottle. After the electric push rod 9 is reset, conveyor belt 2, under the control of the microcontroller, transfers the polyester-polyethylene glycol copolymer bottle on platform 1 to the subsequent process.

[0064] S5: Repeat steps S1-S4 to complete the subsequent testing of the polyester-polyethylene glycol copolymer bottle.

[0065] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for detecting the air tightness of a polyester-polyethylene glycol copolymer bottle, comprising a platform (1), wherein the platform (1) is slidably connected to a conveyor belt (2), and the conveyor belt (2) is symmetrically arranged on both sides perpendicular to the platform (1), characterized in that: The platform (1) is slidably connected to a support component that can move up and down. The support component can alternately support the bottom of the polyester-polyethylene glycol copolymer bottle. The platform (1) is slidably connected to a pressure plate (5) that can move up and down. The pressure plate (5) can make the conveyor belt (2) move away from each other or towards each other at the same time. The pressure plate (5) is slidably connected to an airtightness detection component through an elastic element. The pressure plate (5) is fixedly connected to at least one set of electromagnets (8) for marking. The electromagnets (8) can cooperate with the airtightness detection component.

2. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 1, characterized in that: The support assembly includes at least one set of lower support rings (16), the lower end of which is fixedly connected to a second cylinder (15), and a center plate (14) is slidably arranged on the lower support rings (16), the lower end of which is fixedly connected to a first cylinder (9).

3. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 2, characterized in that: The upper end of the center plate (14) is provided with a rubber layer (13), the center plate (14) is fixed with a micro switch (21), the rubber layer (13) is fixed with an inlay plate (22), and the inlay plate (22) can cooperate with the micro switch (21).

4. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 1, characterized in that: The airtightness detection component includes at least one set of upper cover plates (10), the upper cover plates (10) are slidably connected to the pressure plate (5) by a first spring, the upper cover plates (10) are fixedly connected to an air guide pipe (11), and the air guide pipe (11) is slidably connected to an air pipe (7).

5. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 4, characterized in that: The upper end of the air guide pipe (11) is slidably connected to the pressure plate (5), and the upper end of the air guide pipe (11) is provided with a valve core (17). The valve core (17) can cooperate with the pressure plate (5) to control the opening and closing of the air passage.

6. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 4, characterized in that: The pressure plate (5) is fixedly connected to a through pipe (12). A metal plate (19) is slidably connected inside the pressure plate (5) through an elastic element. The pressure plate (5) is also provided with a conductive post (20) that cooperates with the metal plate (19). The metal plate (19) can cooperate with the through pipe (12). The lower end of the through pipe (12) passes through the upper cover plate (10).

7. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 1, characterized in that: The pressure plate (5) has inclined grooves (23) at both ends. The upper end of the conveyor belt (2) is fixedly connected to a vertical rod (3). The vertical rod (3) is fixedly connected to a guide pin (4). The guide pin (4) is slidably placed in the inclined groove (23).

8. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 1, characterized in that: The platform (1) is fixedly connected to an electric push rod (6), and the movable end of the electric push rod (6) is fixedly connected to the pressure plate (5).

9. The device for detecting the air tightness of polyester-polyethylene glycol copolymer bottles according to claim 4, characterized in that: A one-way valve (18) is provided between the air guide tube (11) and the air tube (7).

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