Equipment and method for rapidly and accurately detecting sealing performance based on chemical plastic barrel

Abstract

The invention discloses a device and method for rapidly and accurately detecting the sealing performance based on a chemical plastic bucket, and relates to the technical field of chemical plastic bucket detection machinery, and the device comprises an inflation mechanism, a bucket body, a bucket opening formed in the top of the bucket body, a clamping mechanism used for clamping the bucket body, a lifting mechanism, a sealing mechanism, a detection mechanism and a controller. The sealing plates on the two sides are driven by the driving assembly to move towards the opposite sides, meanwhile, the multi-point inner supporting assembly conducts multi-point inner supporting on the barrel opening, and the opposite sides of the two second rubber strips on the bottom make contact with each other and wrap the bottom of the outer wall of the barrel opening finally. The opposite sides of the two second rubber strips on the top make contact with each other and wrap the outer wall of the circular plate located above the barrel opening, the opposite sides of the first rubber strips on the left side and the right side make contact with each other, sealing of the barrel opening is completed, and compared with the prior art, the problem of deformation of the barrel opening can be avoided through extrusion sealing of the outer side of the barrel opening and multi-point supporting of the inner side of the barrel opening; therefore, accurate detection of the sealing performance of the chemical plastic barrel is ensured.

Description

Technical Field

[0001] This invention relates to the field of mechanical testing technology for chemical plastic drums, specifically to a rapid and accurate testing device and method for the sealing performance of chemical plastic drums. Background Technology

[0002] Chemical plastic drums can replace stainless steel, titanium and other metal containers in a wide range of applications. They are the most ideal corrosion-resistant storage and transportation equipment for chemical liquids today, and are also inexpensive and of high quality.

[0003] The structure of existing chemical plastic drums is generally as shown in the instruction manual. Figure 10 As shown, the device includes a barrel body 100 and a threaded barrel opening 200. The sealing performance of the plastic barrel after production is the most important test. Existing testing equipment typically involves filling an empty barrel with compressed air, maintaining the pressure for a period, and using a pressure gauge to monitor pressure changes; a pressure drop indicates a leak. In practice, a sealing cap needs to be placed on top of the barrel opening 200. To ensure a tight seal between the cap and the opening 200, significant force is required to press the cap onto the opening. Since the opening 200 is usually located on the side of the barrel body 100, uneven force can easily occur on the barrel body during testing. This uneven force can cause the barrel body 100 to tilt, affecting the sealing effect of the opening 200 and reducing the accuracy of the test results. Authorization announcement number CN118896741B discloses a sealing performance testing device for special barrels used for storing and transporting chemical materials, which includes a conveying device for transporting plastic barrels and a compression device. During the testing process, the two plastic buckets are symmetrically distributed and subjected to force simultaneously. This not only increases the stability of the two plastic buckets but also prevents them from tilting during testing, ensuring the sealing of the plastic bucket outlet and improving the accuracy of the plastic bucket sealing test results.

[0004] While existing technology can clamp the barrel 100 to prevent it from tilting, it requires applying significant force to press the sealing cap onto the barrel opening 200. Under this pressure, the barrel opening 200 is prone to deformation. Since chemical plastic barrels have a certain degree of elasticity, pressing the sealing cap forcefully onto the barrel opening 200 concentrates the pressure on the end face of the barrel opening 200. The barrel opening 200 then transmits this pressure to the top of the barrel 100, causing uneven depression at the top of the barrel 100. This can easily lead to plastic deformation of the barrel opening 200, such as dents, warping, and diameter contraction or expansion. After deformation, gaps can easily appear between the barrel opening 200 and the sealing cap, thus affecting the sealing test results and reducing the accuracy of the test. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a rapid and accurate testing device and method for the sealing performance of chemical plastic drums, thus solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rapid and accurate sealing performance testing device for chemical plastic drums, comprising an inflation mechanism, a drum body, a drum opening located at the top of the drum body, a clamping mechanism for holding the drum body, a lifting mechanism, a sealing mechanism, a testing mechanism, and a controller; the sealing mechanism includes a connecting assembly, the lifting mechanism is used to lift the connecting assembly, the connecting assembly is provided with a driving assembly and a circular plate, the driving assembly is used to drive two sealing plates to move in opposite directions, rubber strips are provided at both the front and rear ends of the opposite sides of the two sealing plates, and rubber strips connected to the front and rear rubber strips are provided at both the upper and lower ends of the opposite sides of the two sealing plates, with two rubber strips at the bottom. The opposite sides of the second rubber strip are in contact with each other and wrap around the bottom of the outer wall of the barrel opening. The opposite sides of the two second rubber strips at the top are in contact with each other and wrap around the outer wall of the circular plate located above the barrel opening. The opposite sides of the first rubber strips on the left and right sides are in contact with each other. The circular plate is rotatably connected to a hollow shaft through a sealed bearing. The connecting assembly is provided with a rotating assembly for driving the hollow shaft to rotate. The hollow shaft is provided with a multi-point inner support assembly, which is used to provide multi-point support for the inner ring of the barrel opening. The detection mechanism includes an air pipe and a flexible hose connected to the air pipe. The flexible hose is connected to a connecting pipe set on the circular plate. A pressure gauge is provided on the air pipe. The inflation mechanism is used to inflate the air pipe with compressed air.

[0007] Preferably, the connecting assembly includes a guide rail, and the bottom of the guide rail is provided with a connecting frame that connects to the circular plate.

[0008] Preferably, the drive assembly includes an electric bidirectional lead screw mounted on a guide rail. Both ends of the electric bidirectional lead screw are threaded with vertical rods that are slidably connected to the guide rail. The two vertical rods are fixedly connected to the two sealing plates on both sides. Horizontal rods are provided at both the front and rear ends of the two vertical rods. Guide rods that are slidably connected to the horizontal rods are provided on both the front and rear sides of the guide rail.

[0009] Preferably, the rotating assembly includes a geared motor mounted on a connecting frame, the output shaft of the geared motor being connected to a rotating frame, the rotating frame being fixedly connected to a hollow shaft, and a universal ball bearing being movably connected to the bottom of the rotating frame to contact the top of the sealing plate.

[0010] Preferably, the multi-point internal support assembly includes a vertically formed through groove on the hollow shaft, a slider slidably connected to the through groove, inclined rods evenly hinged to the outer side of the slider, a fixed frame hinged to the bottom of each inclined rod, the fixed frame slidably connected to a guide plate on the hollow shaft, a rotating cylinder rotatably connected to the fixed frame via a bearing, a protective sleeve fixedly fitted to the outer side of the rotating cylinder and contacting the inner wall of the cylinder opening, the bottom of the slider contacting a movable rod, the movable rod slidably fitted onto a mounting rod, the mounting rod detachably connected to the bottom of the hollow shaft, and a return spring connected to the movable rod at the top of the mounting rod, the inner ring of the hollow shaft integrally formed with a convex ring, the top of the slider being fitted with a pressing block vertically slidably connected to the inner cavity of the hollow shaft, the pressing block being mounted on an electric telescopic rod, and the electric telescopic rod being detachably connected to the hollow shaft, and a sealing ring contacting the convex ring being provided on the pressing block.

[0011] Preferably, the inflation mechanism includes an air compressor, which has an air outlet connected to an air pipe and a shut-off valve on the air outlet. The air pipe is also equipped with a pressure relief valve.

[0012] Preferably, the clamping mechanism includes a frame, on which a placement slot for placing a barrel is provided, and electric push rods are provided around the inside of the placement slot. The output end of the electric push rod is provided with a clamping plate that contacts the barrel.

[0013] Preferably, the lifting mechanism includes a mounting frame disposed on a placement slot, a cylinder disposed on the mounting frame, the piston rod of the cylinder being connected to a guide rail, and a connecting rod disposed on the piston rod of the cylinder, and a slide rail disposed on the mounting frame being slidably connected to the connecting rod.

[0014] The method for using a rapid and accurate airtightness testing device for chemical plastic drums includes the following steps: Step 1: Clamp the barrel body with the clamping mechanism, and then raise and lower the connecting component with the lifting mechanism so that the sealing plate and the hollow shaft move downwards, so that the hollow shaft can enter the barrel opening. At this time, the axis of the hollow shaft coincides with the axis of the barrel opening. Step 2: Drive the sealing plates on both sides to move towards the opposite side through the drive component, and at the same time, make the multi-point internal support component perform multi-point internal support on the barrel opening, so that the opposite sides of the two bottom rubber strips 2 contact each other and wrap around the bottom of the outer wall of the barrel opening, the opposite sides of the two top rubber strips 2 contact each other and wrap around the outer wall of the circular plate located above the barrel opening, and the opposite sides of the left and right rubber strips 1 contact each other, thus completing the sealing of the barrel opening; Step 3: Inflate the air pipe through the inflation mechanism, so that the compressed air enters the connecting pipe through the hose, and then enters the space enclosed by the sealing plate, the circular plate and the barrel opening, and can then enter the barrel body. After reaching the test pressure, maintain the pressure for a period of time and observe the pressure gauge reading. If there is no change, it proves that the sealing is qualified; if there is a change, it proves that the sealing is unqualified.

[0015] In step three, the height of the bottom rubber strip two is readjusted by lifting and lowering the lifting mechanism, that is, the position of its wrapping around the outer wall of the barrel opening is changed. Then, the hollow shaft is rotated by the rotating component, so that the multi-point inner support component changes the support position of the inner wall when supporting the inner wall of the barrel opening at multiple points, so as to conduct a comprehensive test of the sealing performance of the barrel opening.

[0016] This invention provides a rapid and accurate device and method for testing the sealing performance of chemical plastic drums. Compared with existing technologies, it has the following advantages: 1. This rapid and accurate sealing test equipment and method for chemical plastic drums utilizes a lifting mechanism to raise and lower the connecting components, causing both the sealing plate and the hollow shaft to move downwards. This allows the hollow shaft to enter the drum opening, where its axis coincides with the drum opening's axis. A drive assembly then moves the two sealing plates to opposite sides, while a multi-point internal support assembly provides multi-point internal support to the drum opening. Finally, the opposite sides of the two bottom rubber strips contact and wrap around the bottom of the drum opening's outer wall, and the opposite sides of the two top rubber strips contact and wrap around the outer wall of the circular plate located above the drum opening. On the top, the opposite sides of the rubber strips on the left and right sides contact each other to seal the barrel opening. By squeezing and sealing the outside of the barrel opening and providing multi-point support on the inside, this technology avoids the problem of barrel opening deformation, thus ensuring accurate testing of the sealing performance of chemical plastic barrels. Furthermore, by raising and lowering the bottom rubber strip, the height of the bottom rubber strip is readjusted, changing its position to wrap around the outer wall of the barrel opening. Then, by rotating the hollow shaft through the rotating component, the multi-point support component changes its support position on the inner wall of the barrel opening while providing multi-point support, so as to conduct a comprehensive test of the barrel opening's sealing performance.

[0017] 2. This rapid and accurate sealing test equipment and method for chemical plastic drums requires that the electric telescopic rod be isolated from compressed air to avoid damage during pressure holding. If the output end of the electric telescopic rod is connected to the slider through the sealing ring, the sealing ring will be worn with each extension and retraction, which is not suitable for the production line testing of chemical plastic drums. Therefore, the electric telescopic rod can drive the extrusion block to move down, so that the extrusion block contacts the slider and pushes the slider down, which compresses the return spring below. At the same time, it drives the inclined rod to push the outer rotating cylinder closer to the inner wall of the drum opening, and then the protective sleeve tightly abuts against the inner wall of the drum opening for multi-point support. At this time, the sealing ring is squeezed to contact the convex ring to seal the internal space of the hollow shaft, preventing compressed air from entering the hollow shaft through the through groove and overflowing through the space above. It also allows the electric telescopic rod to be placed in the sealed compressed air, protecting the normal use of the electric telescopic rod. Moreover, the sealing ring is a compression seal, which greatly improves the wear resistance compared to the sleeve seal, making it especially suitable for the production line testing of chemical plastic drums. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the lifting mechanism of the present invention; Figure 3 This is a schematic diagram of the barrel body and sealing mechanism of the present invention; Figure 4 This is an enlarged schematic diagram of the sealing mechanism of the present invention; Figure 5 This is a schematic diagram of rubber strip one and rubber strip two of the present invention; Figure 6 This is a cross-sectional schematic diagram of the sealing mechanism of the present invention; Figure 7 This is a schematic diagram of the rotating component and the multi-point internal support component of the present invention; Figure 8 This is a partial structural schematic diagram of the multi-point internal support component of the present invention; Figure 9 For the present invention Figure 8 A schematic diagram at point A in the middle; Figure 10 This is a schematic diagram of the structure of a chemical plastic drum in the prior art.

[0019] In the diagram: 1. Inflation mechanism; 11. Air compressor; 12. Air outlet; 13. Shut-off valve; 2. Clamping mechanism; 21. Frame; 22. Placement slot; 23. Electric push rod; 24. Clamping plate; 3. Barrel body; 4. Barrel opening; 5. Lifting mechanism; 51. Mounting bracket; 52. Cylinder; 53. Connecting rod; 54. Slide rail; 6. Sealing mechanism; 61. Connecting assembly; 611. Guide rail; 612. Connecting frame; 62. Drive assembly; 621. Electric double-acting screw; 622. Vertical rod; 623. Horizontal rod; 624. Guide rod; 63. Sealing plate; 64. Rubber strip one; 65. Rubber strip two; 66. Circular plate; 661. Connecting pipe; 67. Sealing 68. Bearing; 69. Hollow shaft; 60. Rotating assembly; 61. Gear motor; 692. Rotating frame; 693. Universal ball bearing; 610. Multi-point internal support assembly; 6101. Through groove; 6102. Slider; 6103. Diagonal bar; 6104. Fixing frame; 6105. Guide plate; 6106. Rotating drum; 6107. Protective sleeve; 6108. Movable rod; 6109. Mounting rod; 61010. Return spring; 61011. Convex ring; 61012. Extrusion block; 61013. Electric telescopic rod; 61014. Sealing ring; 7. Detection mechanism; 71. Air pipe; 72. Hose; 73. Pressure gauge; 74. Pressure relief valve; 8. Controller. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] See Figures 1-10 The present invention provides the following two technical solutions: The first implementation method is a rapid and accurate sealing test device for chemical plastic drums, which includes an inflation mechanism 1, a drum body 3, a drum opening 4 set on the top of the drum body 3, a clamping mechanism 2 for clamping the drum body 3, a lifting mechanism 5, a sealing mechanism 6, a testing mechanism 7, and a controller 8. The controller 8 is used by workers to control the electrical components in the document. All electrical components in the document are powered by existing technology. The sealing mechanism 6 includes a connecting assembly 61 and a lifting mechanism 5 for lifting the connecting assembly 61. The connecting assembly 61 is equipped with a driving assembly 62 and a circular plate 66. The driving assembly 62 drives two sealing plates 63 to move in opposite directions. The sealing plates 63 have a semi-circular structure. Rubber strips 64 are provided at both the front and rear ends of opposite sides of the two sealing plates 63. Rubber strips 65, connected to the front and rear rubber strips 64, are provided at both the upper and lower ends of opposite sides of the two sealing plates 63. The opposite sides of the two bottom rubber strips 65 contact each other and wrap around the bottom of the outer wall of the barrel opening 4. The opposite sides of the two top rubber strips 65 contact each other and wrap around the bottom of the barrel opening 4. The rubber strips 64 on the left and right sides of the circular plate 66, which are located above the barrel opening 4, are in contact with and wrapped around the outer wall of the circular plate 66. The circular plate 66 is rotatably connected to the hollow shaft 68 through the sealed bearing 67. The reason for using the sealed bearing 67 is to ensure the sealing performance at this point. Moreover, the pressure resistance of the existing sealed bearing 67 is sufficient to ensure that there is no air leakage within the pressure range during the sealing test of the chemical plastic barrel. The connecting component 61 is provided with a rotating component 69 for driving the hollow shaft 68 to rotate. The hollow shaft 68 is provided with a multi-point inner support component 610, which is used to provide multi-point support for the inner ring of the barrel opening 4. The detection mechanism 7 includes an air pipe 71 and a flexible hose 72 connected to the air pipe 71. The flexible hose 72 is connected to a connecting pipe 661 set on the circular plate 66. The reason for setting the flexible hose 72 is to avoid affecting the connecting pipe 661 when the circular plate 66 moves up and down. A pressure gauge 73 is set on the air pipe 71, which is used to detect changes in pressure. The inflation mechanism 1 is used to inflate compressed air into the air pipe 71.

[0022] The connecting component 61 includes a guide rail 611, and a connecting bracket 612 connected to the circular plate 66 is provided at the bottom of the guide rail 611.

[0023] The drive assembly 62 includes an electric bidirectional lead screw 621 mounted on a guide rail 611. Both ends of the electric bidirectional lead screw 621 are threaded with vertical rods 622 that are slidably connected to the guide rail 611, so that the two vertical rods 622 can move along the guide rail 611 in opposite directions. The two vertical rods 622 are fixedly connected to the two sealing plates 63 respectively, which can drive the two sealing plates 63 to move.

[0024] Since the vertical rod 622 is connected to the sealing plate 63 near the lower part, the vertical rod 622 is prone to breakage when the sealing plate 63 is squeezed. Therefore, horizontal rods 623 are provided at both the front and rear ends of the vertical rods 622 on both sides, and guide rods 624 that are slidably connected to the horizontal rods 623 are provided on both the front and rear sides of the guide rail 611. This allows the horizontal rods 623 to slide on the guide rods 624 when the vertical rods 622 move, and also improves the structural strength.

[0025] The rotating assembly 69 includes a geared motor 691 mounted on a connecting frame 612, which drives the geared motor 691 to rise and fall when the connecting frame 612 is raised or lowered. The output shaft of the geared motor 691 is connected to a rotating frame 692, which is fixedly connected to a hollow shaft 68. A universal ball bearing 693 is movably connected to the bottom of the rotating frame 692 and contacts the top of the sealing plate 63. The geared motor 691 drives the rotating frame 692 to rotate, causing the hollow shaft 68 to rotate through the sealed bearing 67. The universal ball bearing 693 does not affect the rotation, and when the hollow shaft 68 is subsequently subjected to downward pressure, the universal ball bearing 693 can bear the pressure, avoiding the need for the sealed bearing 67 to bear the pressure alone.

[0026] The inflation mechanism 1 includes an air compressor 11, an air outlet 12 connected to an air pipe 71, a shut-off valve 13 on the air outlet 12, and a pressure relief valve 74 on the air pipe 71. The shut-off valve 13 is opened when inflation and closed when pressure is maintained. After the test is completed, the pressure relief valve 74 is opened to release pressure.

[0027] The clamping mechanism 2 includes a frame 21, on which a placement slot 22 for placing a barrel 3 is provided. Electric push rods 23 are provided around the inside of the placement slot 22. The output end of the electric push rod 23 is provided with a clamping plate 24 that contacts the barrel 3. The electric push rod 23 pushes the clamping plate 24 to move and fix the barrel 3 around its sides.

[0028] The lifting mechanism 5 includes a mounting frame 51 mounted on the placement slot 22. A cylinder 52 is mounted on the mounting frame 51. The control of the cylinder 52 can be achieved using existing technology. The piston rod of the cylinder 52 is connected to the guide rail 611, which can drive the guide rail 611 to lift. A connecting rod 53 is also mounted on the piston rod of the cylinder 52. A slide rail 54 is mounted on the mounting frame 51 and is slidably connected to the connecting rod 53. The connecting rod 53 slides on the slide rail 54, which improves the stability when the cylinder 52 drives the lifting.

[0029] To avoid damage to the power source for the internal support, i.e., the electric telescopic rod 61013, due to pressure holding within the sealed space, a second implementation method is provided. The main difference from the first implementation method is that the multi-point internal support assembly 610 includes a vertically formed through groove 6101 on the hollow shaft 68. A slider 6102 is slidably connected to the through groove 6101. Diagonal rods 6103 are evenly hinged to the outer side of the slider 6102. A fixing frame 6104 is hinged to the bottom of each diagonal rod 6103. A guide plate 6105 is slidably connected to the hollow shaft 68. A rotating cylinder 6106 is rotatably connected to the fixed frame 6104 via a bearing. To prevent scratches between the metal and the inner wall of the barrel opening 4, a protective sleeve 6107 is fixedly sleeved on the outside of the rotating cylinder 6106, which contacts the inner wall of the barrel opening 4. The sleeve can be an elastic structure, such as a wear-resistant rubber sleeve. The bottom of the slider 6102 contacts the movable rod 6108. The movable rod 6108 is slidably sleeved on the mounting rod 6109, which is detachable. A return spring 61010, connected to the bottom of the hollow shaft 68 and the top of the mounting rod 6109, and connected to the movable rod 6108, is provided. When the slider 6102 is not subjected to downward pressure, the return spring 61010 pushes the movable rod 6108 upward, and the movable rod 6108 pushes the slider 6102 upward. The inner ring of the hollow shaft 68 is integrally formed with a convex ring 61011, and the top of the slider 6102 is fitted with a pressing block 61012 that is vertically slidably connected to the inner cavity of the hollow shaft 68. The reason is that when the electric telescopic rod 61013 rotates, the hollow shaft 68 can drive the extrusion block 61012 to rotate through the sliding guide, instead of relying solely on the electric telescopic rod 61013 to drive its rotation, thereby improving the service life of the electric telescopic rod 61013. The extrusion block 61012 is set on the electric telescopic rod 61013, and the electric telescopic rod 61013 is detachably connected to the hollow shaft 68. The extrusion block 61012 is provided with a sealing ring 61014 that contacts the convex ring 61011.

[0030] The electric telescopic rod 61013 needs to be isolated from compressed air, meaning it cannot be located within a pressure-holding sealed space to avoid damage during pressure holding. However, if the output end of the electric telescopic rod 61013 is connected to the slider 6102 through the sealing ring 61014, although it avoids being located within a sealed space, it will cause wear on the sealing ring 61014 with each extension and retraction, which is unsuitable for the assembly line inspection of chemical plastic drums. Therefore, the electric telescopic rod 61013 can drive the extrusion block 61012 to move downwards, so that the extrusion block 61012 contacts the slider 6102 and pushes the slider down, compressing the return spring 61010 below, and simultaneously driving the inclined rod 6103. The external rotating drum 6106 is pushed closer to the inner wall of the barrel opening 4, and then the protective sleeve 6107 is tightly pressed against the inner wall of the barrel opening 4 for multi-point support. At this time, the sealing ring 61014 is squeezed and contacts the convex ring 61011 to seal the internal space of the hollow shaft 68, preventing compressed air from entering the hollow shaft 68 through the through groove 6101 and overflowing through the upper space. It also prevents the electric telescopic rod 61013 from being placed in the sealed compressed air, protecting the normal use of the electric telescopic rod 61013. Moreover, the sealing ring 61014 is a compression seal, which greatly improves the wear resistance compared to the sleeve seal, and is especially suitable for the production line inspection of chemical plastic barrels.

[0031] The method of using the rapid and accurate sealing test equipment for chemical plastic drums, as described in the second embodiment, includes the following steps: Step 1: Clamp the barrel 3 with the clamping mechanism 2 and place it into the placement slot 22. Then, control the electric push rod 23 with the controller 8 to make the clamping plate 24 clamp the barrel 3. Then, lift the connecting component 61 with the lifting mechanism 5, that is, drive the guide rail 611 to move down with the cylinder 52, so that the sealing plate 63 and the hollow shaft 68 move down, and the hollow shaft 68 can enter the barrel opening 4. At this time, the axis of the hollow shaft 68 coincides with the axis of the barrel opening 4. Step 2: By driving the two sealing plates 63 on both sides to move towards the opposite side through the drive assembly 62, the electric bidirectional screw 621 can be controlled to drive the two sealing plates 63 on both sides to move towards the opposite side. At the same time, the electric telescopic rod 61013 pushes the extrusion block 61012 down, so that the sealing ring 61014 seals the convex ring 61011, and the multi-point internal support assembly 610 provides multi-point internal support for the barrel opening 4, that is, multiple protective sleeves 6107 provide multi-point support for the inner wall of the barrel opening 4. Thus, the opposite sides of the two bottom rubber strips 65 contact each other and wrap around the bottom of the outer wall of the barrel opening 4, the opposite sides of the two top rubber strips 65 contact each other and wrap around the outer wall of the circular plate 66 located above the barrel opening 4, and the opposite sides of the left and right rubber strips 64 contact each other, thus completing the sealing of the barrel opening 4. Step 3: By opening the air supply mechanism 1, i.e., the shut-off valve 13, the air outlet 12 is used to inflate the air pipe 71. The compressed air then enters the connecting pipe 661 through the hose 72, and then enters the space enclosed by the sealing plate 63, the circular plate 66, and the barrel opening 4. This allows the compressed air to enter the barrel 3. After reaching the test pressure, the pressure is maintained for a period of time, and the value of the pressure gauge 73 is observed. If there is no change, it proves that the sealing performance is qualified. If there is a change, it proves that the sealing performance is unqualified.

[0032] In step three, pressure is first released through the pressure relief valve 74, and then the lifting mechanism 5 is used to raise and lower the barrel, that is, to readjust the height of the bottom rubber strip 65, that is, to change the position of the outer wall covering the barrel opening 4. Then, the hollow shaft 68 is rotated by the rotating component 69, that is, the reduction motor 691 rotates the hollow shaft 68, so that the multiple protective sleeves 6107 in the multi-point inner support component 610 change the support position of the inner wall when supporting the inner wall of the barrel opening 4 at multiple points, so as to conduct a comprehensive test of the sealing performance of the barrel opening 4.

[0033] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid and accurate testing device for the sealing performance of chemical plastic drums, characterized in that: It includes an inflation mechanism (1), a barrel body (3), a barrel opening (4) set on the top of the barrel body (3), a clamping mechanism (2) for clamping the barrel body (3), a lifting mechanism (5), a sealing mechanism (6), a detection mechanism (7) and a controller (8); The sealing mechanism (6) includes a connecting assembly (61), and the lifting mechanism (5) is used to lift the connecting assembly (61). The connecting assembly (61) is provided with a driving assembly (62) and a circular plate (66). The driving assembly (62) is used to drive the two sealing plates (63) to move in opposite directions. Rubber strips (64) are provided at the front and rear ends of the opposite sides of the two sealing plates (63). Rubber strips (65) connected to the front and rear rubber strips (64) are provided at the upper and lower ends of the opposite sides of the two sealing plates (63). The opposite sides of the two bottom rubber strips (65) contact each other and wrap around each other. At the bottom of the outer wall of the barrel opening (4), the opposite sides of the two rubber strips (65) at the top contact each other and wrap around the outer wall of the circular plate (66) located above the barrel opening (4). The opposite sides of the rubber strips (64) on the left and right sides contact each other. The circular plate (66) is rotatably connected to a hollow shaft (68) through a sealed bearing (67). The connecting assembly (61) is provided with a rotating assembly (69) for driving the hollow shaft (68) to rotate. The hollow shaft (68) is provided with a multi-point inner support assembly (610). The multi-point inner support assembly (610) is used to provide multi-point support for the inner ring of the barrel opening (4). The detection mechanism (7) includes an air tube (71) and a flexible tube (72) connected to the air tube (71). The flexible tube (72) is connected to a connecting tube (661) set on a circular plate (66). A pressure gauge (73) is set on the air tube (71). The inflation mechanism (1) is used to inflate compressed air into the air tube (71).

2. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 1, characterized in that: The connecting assembly (61) includes a guide rail (611), and the bottom of the guide rail (611) is provided with a connecting bracket (612) that connects to the circular plate (66).

3. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 2, characterized in that: The drive assembly (62) includes an electric bidirectional lead screw (621) mounted on a guide rail (611). Both ends of the electric bidirectional lead screw (621) are threaded with vertical rods (622) that are slidably connected to the guide rail (611). The two vertical rods (622) are fixedly connected to the two sealing plates (63) respectively. Both ends of the two vertical rods (622) are provided with horizontal rods (623). The guide rail (611) is provided with guide rods (624) that are slidably connected to the horizontal rods (623) on both the front and rear sides.

4. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 2, characterized in that: The rotating assembly (69) includes a geared motor (691) mounted on a connecting frame (612). The output shaft of the geared motor (691) is connected to a rotating frame (692). The rotating frame (692) is fixedly connected to a hollow shaft (68), and the bottom of the rotating frame (692) is movably connected to a universal ball bearing (693) that contacts the top of the sealing plate (63).

5. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 1, characterized in that: The multi-point internal support assembly (610) includes a vertical through groove (6101) on a hollow shaft (68), a slider (6102) slidably connected to the through groove (6101), and inclined rods (6103) evenly hinged to the outer side of the slider (6102). A fixing frame (6104) is hinged to the bottom of each inclined rod (6103). The fixing frame (6104) is slidably connected to a guide plate (6105) on the hollow shaft (68). A rotating cylinder (6106) is rotatably connected to the fixing frame (6104) via a bearing. A protective sleeve (6107) is fixedly sleeved on the outer side of the rotating cylinder (6106) to contact the inner wall of the barrel opening (4). The bottom of the slider (6102) contacts a movable rod (6108). 08) The sliding sleeve is attached to the mounting rod (6109), which is detachably connected to the bottom of the hollow shaft (68). The top of the mounting rod (6109) is provided with a return spring (61010) connected to the movable rod (6108). The inner ring of the hollow shaft (68) is integrally formed with a convex ring (61011). The top of the slider (6102) is fitted with a pressing block (61012) that is vertically slidably connected to the inner cavity of the hollow shaft (68). The pressing block (61012) is set on the electric telescopic rod (61013), which is detachably connected to the hollow shaft (68). The pressing block (61012) is provided with a sealing ring (61014) that contacts the convex ring (61011).

6. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 1, characterized in that: The inflation mechanism (1) includes an air compressor (11), which is provided with an air outlet (12) connected to an air pipe (71) and a shut-off valve (13) is provided on the air outlet (12). The air pipe (71) is also provided with a pressure relief valve (74).

7. The rapid and accurate sealing test equipment based on chemical plastic drums according to claim 2, characterized in that: The clamping mechanism (2) includes a frame (21), on which a placement slot (22) for placing a barrel (3) is provided. Electric push rods (23) are provided around the inside of the placement slot (22), and the output end of the electric push rods (23) is provided with a clamping plate (24) that contacts the barrel (3).

8. The rapid and accurate sealing test device for chemical plastic drums according to claim 7, characterized in that: The lifting mechanism (5) includes a mounting bracket (51) set on the placement slot (22), a cylinder (52) is set on the mounting bracket (51), the piston rod of the cylinder (52) is connected to the guide rail (611), and a connecting rod (53) is also set on the piston rod of the cylinder (52). A slide rail (54) is set on the mounting bracket (51) and is slidably connected to the connecting rod (53).

9. A method for rapid and accurate testing of the sealing performance of chemical plastic drums, characterized in that: The rapid and accurate sealing performance testing device for chemical plastic drums according to any one of claims 1-8 includes the following steps: Step 1: Clamp the barrel (3) with the clamping mechanism (2), and then lift the connecting assembly (61) with the lifting mechanism (5) so that the sealing plate (63) and the hollow shaft (68) move downwards, and the hollow shaft (68) can enter the barrel opening (4). At this time, the axis of the hollow shaft (68) coincides with the axis of the barrel opening (4). Step 2: Drive the sealing plates (63) on both sides to move towards the opposite side by the drive assembly (62), and at the same time make the multi-point internal support assembly (610) perform multi-point internal support on the barrel opening (4), so that the opposite sides of the two bottom rubber strips (65) contact each other and wrap around the bottom of the outer wall of the barrel opening (4), the opposite sides of the two top rubber strips (65) contact each other and wrap around the outer wall of the circular plate (66) located above the barrel opening (4), and the opposite sides of the rubber strips (64) on the left and right sides contact each other, thus completing the sealing of the barrel opening (4); Step 3: Inflate the air pipe (71) through the inflation mechanism (1), so that the compressed air enters the connecting pipe (661) through the hose (72), and then enters the space enclosed by the sealing plate (63), the round plate (66) and the barrel opening (4), and can then enter the barrel body (3). After reaching the test pressure, maintain the pressure for a period of time and observe the value of the pressure gauge (73). If there is no change, it proves that the sealing is qualified. If there is a change, it proves that the sealing is unqualified.

10. The method for rapid and accurate testing of the sealing performance of chemical plastic drums according to claim 9, characterized in that: In step three, the height of the bottom rubber strip (65) is readjusted by lifting mechanism (5), that is, the position of wrapping the outer wall of the barrel opening (4) is changed. Then, the hollow shaft (68) is rotated by rotating component (69) so that the multi-point inner support component (610) changes the support position of the inner wall when supporting the inner wall of the barrel opening (4) at multiple points, so as to conduct a comprehensive test of the sealing performance of the barrel opening (4).

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