Blow molding barrel body detection device capable of being rapidly in place

Abstract

The invention discloses a quick-in-place blow molding barrel body detection device, and relates to the technical field of plastic barrel detection devices.The quick-in-place blow molding barrel body detection device comprises a conveying frame, a plurality of conveying assemblies are arranged in the conveying frame, and each conveying assembly comprises a mounting frame and a conveying belt arranged in the mounting frame; the weighing mechanism comprises a weighing frame arranged in the conveying frame weighing station and a lifting driving piece connected to the bottom of the corresponding conveying assembly mounting frame; the barrel cover unscrewing station comprises a limiting frame arranged in the conveying frame, the top of the limiting frame is provided with a horizontally-moving frame body capable of horizontally moving, the horizontally-moving frame body is connected with a lifting linear module, and a claw clamp used for clamping a barrel cover is fixed to the bottom of the lifting linear module; and the water tightness testing station comprises a gantry frame arranged at the output end of the conveying frame, and a liftable inner frame is arranged in the gantry frame. The device and the method have the effects of quick in-place and high-efficiency testing.

Description

Technical Field

[0001] This invention relates to the technical field of plastic bucket inspection devices, and in particular to a quick-positioning blow-molded bucket body inspection device. Background Technology

[0002] Blow-molded drums, as a common type of plastic packaging container, are widely used in food, chemical, and daily necessities industries. With increasingly stringent requirements for product packaging quality, quality control of blow-molded drums has become increasingly important, and drum inspection is a key step in ensuring product quality. After the blow-molded drum is manufactured, its airtightness and quality need to be tested. This process aims to improve testing efficiency and product quality.

[0003] With the widespread adoption of automated production lines and technological advancements, introducing semi-automatic or fully automatic testing devices to improve testing efficiency and accuracy has become a new trend. In the production of blow-molded barrels, ensuring the quality of the barrel body is crucial, especially its airtightness and overall quality, which directly affect product usability and safety. Traditional testing methods often require manual intervention, which is not only inefficient but also susceptible to human error, leading to reduced accuracy of the test results.

[0004] To address this need, various blow-molded barrel testing devices have been developed, typically including conveying systems and watertightness testing systems. However, existing testing devices require manual support and positioning of the barrel during watertightness testing, making it difficult to achieve rapid positioning and efficient testing. Summary of the Invention

[0005] This application provides a blow-molded barrel body testing device for rapid positioning, which has the functions of rapid positioning and efficient testing.

[0006] This application provides a rapid positioning blow-molded barrel body detection device, which adopts the following technical solution: A quick-positioning blow-molded barrel body inspection device includes a conveyor frame, the conveyor frame having multiple conveying components inside, the conveying components including a mounting frame and a conveyor belt disposed within the mounting frame; The weighing mechanism includes a weighing frame disposed in the weighing station of the conveyor frame, and a lifting drive component connected to the bottom of the mounting frame of the corresponding conveyor component. The bucket lid unscrewing station includes a limiting frame set in the conveyor frame. The top of the limiting frame is provided with a horizontally movable translation frame. The translation frame is connected to a lifting linear module. The bottom of the lifting linear module is fixed with a claw clamp for holding the bucket lid. The water tightness testing station includes a gantry frame located at the output end of the conveyor frame. A liftable inner frame is installed inside the gantry frame. The inner frame is connected to a positioning component with rubber blocks at the bottom. A water tank is located below the gantry frame. A submersible cage is installed inside the inner frame and outside the positioning component. Two submersible conveyor belts are symmetrically arranged inside the submersible cage. The cross-sectional dimensions of both the submersible cage and the submersible conveyor belts are smaller than the internal cross-sectional dimensions of the water tank. Doors that can slide up and down and limit the displacement of the test tank are installed on the two open sides of the inner frame.

[0007] Preferably, the upper surface of the conveyor belt is higher than the upper surface of the corresponding mounting frame, and the conveying components are symmetrically arranged on both sides of the central axis of the conveyor frame along the conveying path.

[0008] Preferably, the lifting drive component is a first lifting hydraulic rod. The lifting drive component lowers the corresponding conveying component to be flush with the weighing frame by retracting the first lifting hydraulic rod, or raises the conveying component to detach from the weighing frame by extending it.

[0009] Preferably, the gripper includes a gripper assembly connected by a crank-connecting rod mechanism, and a first drive motor for driving the gripper to rotate is provided between the lifting linear module and the gripper.

[0010] Preferably, the submersion cage adjusts the immersion height of the submersion conveyor belt through lifting and lowering movements. In the raised state, the submersion conveyor belt is used to carry the barrel to the detection starting position, and in the lowered state, it is used to submerge the barrel along with itself into the water tank.

[0011] Preferably, the submersible conveyor belt forms a vertical positioning engagement with the rubber block of the positioning component when it is in the descending state, and the active transmission stops when the conveying surface of the submersible conveyor belt is lower than the water surface of the tank.

[0012] Preferably, a sealing ring is provided on the outer periphery of the rubber block, the sealing ring and the rubber block are integrally formed, and the cross-sectional width of the sealing ring varies uniformly along the axial direction of the rubber block.

[0013] Preferably, the positioning component includes a second electric telescopic rod hinged to the top of the inner frame. The second electric telescopic rod drives the rubber block to move along a preset trajectory through a first connecting rod and a second connecting rod in a linkage. The first connecting rod and the second connecting rod are hinged together.

[0014] Preferably, the rubber block is frustum-shaped, with the larger diameter end of the frustum facing the positioning component, and the outer diameter of the rubber block is larger than the inner diameter of the opening of the barrel to be tested.

[0015] Preferably, the water tightness test station further includes an inflation head connected to the rubber block, the inflation head being connected to an external inflation device, and the side wall of the water tank being provided with a transparent observation area for observing bubbles on the surface of the tank.

[0016] In summary, this application has the following beneficial effects: 1. A highly integrated automated process, from conveying and positioning to weighing, capping, sealing testing, and subsequent processing, with each station seamlessly connected through precision mechanics and electronic control. The entire system utilizes a liftable submersible cage within a water tank, with a submersible conveyor belt inside the cage for efficient transmission. Rubber blocks at the bottom of the positioning components ensure rapid positioning of the barrel, guaranteeing an efficient, accurate, and reliable testing process.

[0017] 2. The rubber block features a frustum-shaped structure, unique in that its outer diameter varies continuously along its axis. This means that when the rubber block is inserted into bucket openings of different diameters, it naturally forms contact at a specific height that matches the inner diameter of the bucket opening. Furthermore, the outer surface of the rubber block is equipped with a sealing ring with a uniformly varied cross-section. This sealing ring conforms to the shape of the frustum, ensuring an effective and consistent sealing contact surface at every point of contact.

[0018] 3. Power is provided by a second electric telescopic rod. When the second electric telescopic rod extends or retracts, it generates a linear displacement. This extension or retraction pulls or pushes the first connecting rod, causing it to rotate around its hinge point with the crossbeam. The second connecting rod is connected to the middle of the first connecting rod. As the first connecting rod rotates, it causes the second connecting rod to rotate accordingly. A linkage system is formed between the first and second connecting rods, consisting of three sets. The rotation of this linkage system causes the plug and rubber block to move along a predetermined trajectory, thus achieving their positioning, support, or sealing functions. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the blow-molded barrel detection device in this embodiment; Figure 2 This is a schematic diagram of the overall connection structure between the lifting linear module and the gripper in this embodiment; Figure 3 This is a schematic diagram of the overall connection structure between the slide rail and the slider in this embodiment; Figure 4 This is a schematic diagram of the overall connection structure between the positioning component and the rubber block in this embodiment; Figure 5 This is a schematic diagram of the internal structure of the positioning component in this embodiment; Explanation of reference numerals in the attached drawings: 1. Conveyor frame; 2. Guide plate; 3. Conveyor assembly; 301. Mounting frame; 302. Conveyor belt; 4. Weighing frame; 5. Limiting frame; 6. Translation frame; 7. Lifting linear module; 8. Claw gripper; 9. First drive motor; 10. Bucket lid conveyor line; 11. Gantry frame; 12. Inner frame; 13. Water tank; 14. Slide rail; 15. Slider; 16. Cylinder; 17. Crossbeam; 18. Positioning assembly; 1801. Second electric telescopic rod; 1802. First connecting rod; 1803. Second connecting rod; 1804. Plug; 19. Rubber block; 20. Inflation head; 21. Inflation equipment; 22. Submersible cage; 23. Submersible conveyor belt; 24. Sealing collar. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0021] This invention discloses a rapid positioning device for testing blow-molded barrel bodies, such as... Figure 1 As shown, the system includes a conveyor frame 1. The inlet of the conveyor frame 1 is inclined downwards and equipped with a guide plate 2. Inside the conveyor frame 1 are six sets of conveying components 3, which are connected in series to form a continuous conveying path, ensuring that the barrel can be continuously transported from the inlet to the entire inspection area. Specifically, the barrel enters from the inlet of the conveyor frame 1, is smoothly guided by the downwardly inclined guide plate 2, and is initially positioned on the conveying components 3. This process utilizes gravity or inertia to achieve rapid positioning of the barrel. Specifically, the conveying components 3 include a mounting frame 301, which is symmetrically arranged about the central axis of the conveyor frame 1, ensuring that the relative positions of the two conveyor belts 302 are fixed and balanced, thus keeping the barrel centered and stable when being pulled forward, preventing it from swaying or deviating. The mounting frame 301 contains conveyor belts 302, the upper surface of which is higher than the upper surface of the mounting frame 301. The two sides of the barrel rest on the surfaces of the two parallel conveyor belts 302. Because the upper surface of the conveyor belt 302 is higher than the upper surface of the mounting bracket 301, this means that most of the bottom and sides of the drum are suspended or exposed. When the conveyor belt 302 starts, it pulls the drum forward through friction with the drum surface.

[0022] like Figure 1As shown, the bottom of the second set of conveying components 3 located at the inlet of the conveyor frame 1 is provided with a first lifting hydraulic rod. The top output end of the first lifting hydraulic rod is connected to the bottom of the mounting frame 301 to realize the lifting of the conveying component 3. A weighing station is formed on the conveyor frame 1 between two adjacent mounting frames 301. A weighing frame 4 for weighing the barrel is provided in the weighing station of the conveyor frame 1.

[0023] like Figure 1 As shown, when it is necessary to transport the barrel without weighing it, the first lifting hydraulic rod extends to raise the conveyor assembly 3 connected to the mounting frame 301. At this time, the conveyor belt 302 of the conveyor assembly 3 is in a higher position, and the barrel is smoothly transported on the conveyor assembly 3, passing directly over the weighing frame 4 below without contacting or pressing on the weighing frame 4.

[0024] like Figure 1 As shown, when the barrel needs to be weighed, the conveyor assembly 3 transports the barrel above the weighing area. Then, the first lifting hydraulic rod retracts, causing the conveyor assembly 3, connected to the mounting frame 301, to descend. As the conveyor assembly 3 descends, it temporarily falls below or is level with the weighing frame 4, smoothly placing the barrel onto the pre-set weighing frame 4 below. At this time, the entire weight of the barrel is borne by the weighing sensor within the weighing frame 4, allowing for accurate weight measurement without interference from the movement of the conveyor assembly 3 or the supporting force.

[0025] like Figure 1 As shown, after weighing is completed, the first lifting hydraulic rod extends again, raising the conveyor assembly 3 to support the barrel again and lifting the barrel off the weighing frame 4, so that the barrel re-contacts the conveyor belt 302 on the conveyor assembly 3 and continues to be conveyed along the conveyor line.

[0026] like Figure 1 and Figure 2As shown, the fifth set of conveying components 3 in the conveyor frame 1 is equipped with an automatic lid unscrewing station. The automatic lid unscrewing station of the conveyor frame 1 is equipped with a limit frame 5. The top of the limit frame 5 is equipped with a horizontally movable translation frame 6, a lifting linear module 7 and a photoelectric sensor mounted on the translation frame 6. When the photoelectric sensor detects the position of the bucket, the photoelectric sensor transmits the sensed signal to the microcontroller, and the microcontroller controls the lifting linear module 7 to move downwards towards the bucket lid. A claw 8 is fixedly installed at the bottom of the lifting linear module 7. The lifting linear module 7 controls the claw to descend. After the claw presses down on the bucket lid, it is acted upon by the crank connecting rod on the claw, and the surrounding claws close to hold the bucket lid. After the claw 8 holds the bucket lid, the first drive motor 9 between the lifting linear module 7 and the claw drives the entire claw to rotate and unscrew the bucket lid. The lifting linear module 7 lifts the bucket lid and moves it to the bucket lid conveyor line 10 located on one side of the conveyor frame 1 via the translation frame 6. Then, the bucket lid is placed on the bucket lid conveyor line 10.

[0027] like Figure 1 and Figure 3 As shown, the output end of the conveyor frame 1 is provided with a gantry frame 11. The inner side of the gantry frame 11 is provided with an inner frame 12 and a water tank 13 from top to bottom. Two slide rails 14 are symmetrically arranged on the inner wall of the gantry frame 11. The slide rails 14 are provided with sliders 15 inside. The sliders 15 are fixed on the inner frame 12. A cylinder 16 is fixedly installed on the top of the gantry frame 11. The bottom output end of the cylinder 16 is connected to the top of the inner frame 12 to drive the inner frame 12, so that the inner frame 12 slides up and down along the slide rails 14 under the action of the sliders 15. A crossbeam 17 is fixedly installed inside the inner frame 12. The bottom of the crossbeam 17 is provided with a positioning component 18 that can be raised and lowered. The bottom of the positioning component 18 is provided with a rubber block 19 that matches the opening of the barrel. An inflation head 20 is provided at the center of the rubber block 19. The inflation head 20 is connected to an external inflation device 21. The barrel is transported to the test position. The positioning component 18 descends, and the rubber block 19 at the bottom precisely blocks the opening of the barrel, forming a relatively sealed space on the barrel.

[0028] like Figure 1 and Figure 3 As shown, while the rubber block 19 seals the opening of the barrel, the inner frame 12 continues to descend, immersing the entire barrel into the interior of the water tank 13 below.

[0029] like Figure 1 and Figure 3 As shown, the external inflation device 21 injects air into the sealed and submerged barrel through the inflation head 20, thereby increasing the internal pressure.

[0030] like Figure 1 and Figure 3 As shown, if the tank's airtightness is compromised, pressurized air inside will escape through these leak points, forming visible bubbles in the water in tank 13. If the tank is well-sealed, no bubbles will form. The airtightness of the tank can be determined by observing whether bubbles are formed inside the tank 13 or on the outside of the tank.

[0031] like Figure 1 and Figure 3 As shown, the bubble detection method is a very intuitive and reliable leak detection method. The formation of bubbles can be directly observed with the naked eye, reducing the likelihood of misjudgment. This testing method does not cause any physical damage to the container and can be used for quality control of batch products. Furthermore, it incorporates automated structures such as cylinder 16 drive, slide rail 14 sliding, and conveyor belt, enabling automated or semi-automated processes for container positioning, sealing, immersion, and detection, significantly improving detection efficiency.

[0032] like Figure 1 and Figure 3 As shown, if bubbles appear, the operator can use the subsequent image recognition component on the gantry frame 11 to observe the location of the bubbles and make a preliminary judgment on the leak point, which helps in subsequent repairs or production process improvements.

[0033] like Figure 3 and Figure 4 As shown, a submersible cage 22 is fixedly installed at the bottom of the crossbeam 17 and outside the positioning component 18. Two submersible conveyor belts 23 are symmetrically arranged inside the submersible cage 22. Driven by the cylinder 16, the inner frame 12, along with the submersible cage 22, moves up and down. This changes the relative height of the submersible conveyor belts 23 within the water tank 13. When the submersible cage 22 rises, causing the submersible conveyor belts 23 to be above the water surface of the water tank 13, the conveyor belts, acting as a normal transport mechanism, smoothly transport the barrel to be tested from the previous station to the starting position of the testing area. At this time, the barrel is in a dry state.

[0034] like Figure 3 and Figure 4 As shown, once the barrel is in place, the inner frame 12 lowers the submersible cage 22, causing the submersible conveyor belt 23 to sink into the water along with the barrel, or lower it to a specific underwater height. In this state, the submersible conveyor belt 23 no longer actively transports the barrel, but instead provides stable bottom support and positioning for the barrel. This ensures that the barrel maintains the correct posture and position during the subsequent descent of the inner frame 12 driven by the cylinder 16, the sealing of the barrel opening by the rubber block 19, and further immersion in the water. In addition, the inner frame has sliding doors on both open sides, preventing the barrel from floating or moving in the water.

[0035] like Figure 4As shown, when the submersible conveyor belt 23 is in the positioning state, it provides stable support for the barrel, ensuring that the rubber block 19 and the barrel opening can be accurately and tightly matched, which is a prerequisite for underwater inflation testing.

[0036] like Figure 4 As shown, the dry transport and wet testing of the barrel are integrated into the same device, eliminating the need for additional handling procedures and equipment to switch between dry and wet environments, which greatly improves the efficiency of the overall testing process.

[0037] like Figure 4 As shown, the positioning function of the submersible conveyor belt 23 after descent ensures that the barrel remains stationary and in the correct posture when it is being tested for inflation underwater. This is crucial for the precise sealing of the rubber block 19 and the accuracy of the test results, and avoids the barrel from shaking or floating in the water.

[0038] like Figure 5 As shown, the positioning assembly 18 includes a second electric telescopic rod 1801 and a first connecting rod 1802 hinged to the bottom of the crossbeam 17. The top of the first connecting rod is hinged to the bottom of the crossbeam 17, and the other end of the first connecting rod is hinged to the output end of the second electric telescopic rod 1801. A second connecting rod 1803 is connected to the middle of the first connecting rod, and a plug 1804 is connected to the bottom of the second connecting rod 1803. A rubber block 19 is located at the bottom of the plug 1804. The second electric telescopic rod 1801 is the power source for the entire system. When the second electric telescopic rod 1801 extends or retracts, it produces a linear displacement. When the second electric telescopic rod 1801 extends or retracts, it pulls or pushes the first connecting rod, causing it to rotate around the hinge point with the crossbeam 17. The second connecting rod 1803 is connected to the middle of the first connecting rod. As the first connecting rod rotates, it causes the second connecting rod 1803 to rotate accordingly. A linkage system is formed between the first connecting rod and the second connecting rod 1803, consisting of three sets. The rotation of the linkage system causes the plug 1804 and the rubber block 19 to move along a predetermined trajectory, thereby achieving functions such as positioning, support, or sealing. The linkage mechanism can effectively convert the linear motion of the electric telescopic rod into rotational motion with a specific angle and path, allowing the component to adapt to more complex spatial layouts and functional requirements.

[0039] like Figure 5As shown, the rubber block 19 has a frustum-shaped structure, unique in that its outer diameter varies continuously along its axis. This means that when this rubber block 19 is inserted into the openings of barrels of different diameters, it will naturally form contact at a specific height that matches the inner diameter of the opening. Furthermore, the outer surface of the rubber block 19 is provided with a sealing ring 24 with a uniformly varied cross-section. This sealing ring 24 varies with the shape of the frustum, ensuring that it provides an effective and consistent sealing contact surface at every contact point. This design allows a component to cover a range of sizes, rather than just a single size.

[0040] like Figure 5 As shown, when the rubber block 19 is pressed into the barrel opening, the rubber material undergoes elastic compression deformation because the outer diameter of the rubber block 19 is designed to be slightly larger than the inner diameter of the barrel opening. This deformation generates outward radial pressure, causing the sealing ring 24 to fit tightly against the inner wall of the barrel opening. The rubber material has inherent high elasticity, which can fill the small irregularities or surface roughness present on the inner wall of the barrel opening, thereby forming an effective airtight or liquid-tight seal.

[0041] like Figure 5 As shown, the sealing collar 24 and the rubber block 19 are integrally formed, eliminating the connection gap between the two, avoiding leakage paths or structural weaknesses that may occur in traditional multi-part combinations, and ensuring the integrity and reliability of the seal.

[0042] like Figure 1 As shown, qualified barrels continue to be transported to the next process, while unqualified barrels are pushed off the conveyor belt after leaving the inspection station. For qualified barrels, the lid is screwed back onto the barrel under the action of the aforementioned claw clamp 8 components.

[0043] Finally, the barrels are transported to the next packaging station.

[0044] Working principle: The barrel enters through the inlet of the conveyor frame 1 and is initially positioned and guided by the downward-sloping guide plate 2. The barrel is then pulled and moved on the conveyor assembly 3, passing through the weighing, capping, and sealing test stations.

[0045] Specifically, when the conveyor belt 302 starts, it pulls the barrel forward by the friction with the surface of the barrel.

[0046] When the barrel first passes the weighing station, the conveyor assembly 3 transports the barrel above the weighing area. Then, the first lifting hydraulic rod retracts, causing the conveyor assembly 3, connected to the mounting frame 301, to descend. As the conveyor assembly 3 descends, it temporarily falls below or is level with the weighing frame 4, smoothly placing the barrel onto the pre-set weighing frame 4 below. At this point, the entire weight of the barrel is borne by the weighing sensor within the weighing frame 4, allowing for accurate weight measurement without interference from the movement of the conveyor assembly 3 or the supporting force.

[0047] After weighing is completed, the first lifting hydraulic rod extends again, raising the conveyor assembly 3 to support the barrel again and lifting the barrel off the weighing frame 4, so that the barrel is in contact with the conveyor belt 302 on the conveyor assembly 3 again and continues to be transported along the conveyor line.

[0048] When the bucket moves to the automatic lid-unscrewing station of the fifth conveyor assembly 3, the photoelectric sensor located there detects the bucket's position. The photoelectric sensor transmits the sensed signal to the microcontroller. Based on the received signal, the microcontroller controls the lifting linear module 7. Under the control of the microcontroller, the lifting linear module 7 moves downward, causing its bottom gripper 8 to descend towards the bucket lid. When the gripper 8 presses down on the bucket lid, the surrounding claws retract and firmly clamp the lid due to the action of the crank-connecting rod mechanism inside the gripper 8. After the gripper 8 successfully clamps the lid, the first drive motor 9 between the lifting linear module 7 and the gripper rotates the entire gripper 8. Because the gripper 8 firmly clamps the lid, the lid is unscrewed. After the lid is unscrewed, the lifting linear module 7 lifts the lid upward, detaching it from the bucket.

[0049] Subsequently, the translation frame 6 moves the lifting linear module 7 and the clamped bucket lid horizontally to the bucket lid conveyor line 10 set on one side of the conveyor frame 1, and places the bucket lid on the conveyor line for subsequent processing.

[0050] Subsequently, the barrel is transported to the test position. The positioning component 18 descends, and the rubber block 19 at the bottom precisely blocks the opening of the barrel, forming a relatively sealed space on the barrel.

[0051] While the rubber block 19 seals the barrel opening, the door is closed to further lock the barrel and prevent it from shifting horizontally. Then, the inner frame 12 continues to descend, immersing the submersible cage 22, the submersible conveyor belt 23, and the entire barrel inside the inner frame 12 into the interior of the water tank 13 below.

[0052] The external inflation device 21 injects air into the sealed and submerged barrel through the inflation head 20, thereby increasing the internal pressure.

[0053] If the container's seal is compromised, pressurized air inside will escape through these leaks, forming visible bubbles in the water in tank 13. If the container is well-sealed, no bubbles will form. The seal of the container can be determined by observing whether bubbles are formed inside the tank 13 or on the outside of the container.

[0054] When the inner frame 12 drives the submersible cage 22 to rise, causing the submersible conveyor belt 23 inside to be higher than the water surface of the water tank 13, the conveyor belt, as a normal conveying mechanism, smoothly transports the barrel to be tested from the previous station to the starting position of the testing area.

[0055] Qualified barrels continue to the next process, while unqualified barrels are pushed off the conveyor belt after leaving the inspection station. Qualified barrels are then screwed back onto the lid by the aforementioned claw clamp assembly 8.

[0056] Finally, the barrels are transported to the next packaging station.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rapid-positioning blow-molded barrel inspection device, characterized in that, It includes a conveyor frame (1), which is provided with multiple conveyor components (3). The conveyor components (3) include a mounting frame (301) and a conveyor belt (302) disposed in the mounting frame (301). The weighing mechanism includes a weighing frame (4) disposed in the weighing station of the conveyor frame (1), and a lifting drive connected to the bottom of the mounting frame (301) of the corresponding conveyor component (3); The bucket lid unscrewing station includes a limiting frame (5) set in the conveyor frame (1). The top of the limiting frame (5) is provided with a horizontally movable translation frame (6). The translation frame (6) is connected to a lifting linear module (7). The bottom of the lifting linear module (7) is fixed with a claw clamp (8) for clamping the bucket lid. The water tightness test station includes a gantry frame (11) set at the output end of the conveyor (1). The gantry frame (11) is equipped with a liftable inner frame (12). The inner frame (12) is connected to a positioning component (18) with a rubber block (19) at the bottom. A water tank (13) is set below the gantry frame (11). A submersible cage (22) is set inside the inner frame (12) and outside the positioning component (18). Two submersible conveyor belts (23) are symmetrically arranged inside the submersible cage (22). The cross-sectional dimensions of the submersible cage (22) and the submersible conveyor belts (23) are smaller than the internal cross-sectional dimensions of the water tank (13). A door that can slide up and down and is used to limit the displacement of the barrel is set on one side of the inner frame (12).

2. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The upper surface of the conveyor belt (302) is higher than the upper surface of the corresponding mounting frame (301), and the conveying assembly (3) is symmetrically arranged on both sides of the central axis of the conveyor frame (1) along the conveying path.

3. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The lifting drive component is a first lifting hydraulic rod. The lifting drive component lowers the corresponding transmission component (3) to be flush with the weighing frame (4) by retracting the first lifting hydraulic rod, or raises the transmission component (3) to detach it from the weighing frame (4) by extending it.

4. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The claw (8) includes a claw assembly connected by a crank-connecting rod mechanism, and a first drive motor (9) for driving the claw (8) to rotate is provided between the lifting linear module (7) and the claw (8).

5. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The submersible cage (22) adjusts the immersion height of the submersible conveyor belt (23) by lifting and lowering. The submersible conveyor belt (23) is used to carry the barrel to the detection start position when it is raised, and to sink the barrel along with itself into the water tank (13) when it is lowered.

6. The rapid positioning blow molding barrel detection device according to claim 5, characterized in that, The submersible conveyor belt (23) forms a vertical positioning engagement with the rubber block (19) of the positioning component (18) in the descending state. The active transmission stops when the conveying surface of the submersible conveyor belt (23) is lower than the water surface of the water tank (13).

7. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, A sealing ring (24) is provided on the outer periphery of the rubber block (19). The sealing ring (24) and the rubber block (19) are integrally formed. The cross-sectional width of the sealing ring (24) varies uniformly along the axial direction of the rubber block (19).

8. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The positioning component (18) includes a second electric telescopic rod (1801) hinged to the top of the inner frame (12). The second electric telescopic rod (1801) drives the rubber block (19) to move along a preset trajectory through a first connecting rod (1802) and a second connecting rod. The first connecting rod (1802) and the second connecting rod are hinged together.

9. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The rubber block (19) is frustum-shaped, with the larger diameter end of the frustum facing the positioning component (18), and the outer diameter of the rubber block (19) is larger than the inner diameter of the barrel opening to be tested.

10. The rapid positioning blow molding barrel detection device according to claim 1, characterized in that, The water tightness test station also includes an inflation head (20) connected to the rubber block (19), the inflation head (20) is connected to an external inflation device (21), and the side wall of the water tank (13) is provided with a transparent observation area for observing bubbles on the surface of the tank.

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