A vacuum pressure detection device for a sealed container

Abstract

The present application belongs to the technical field of airtightness detection of sealed containers, and particularly relates to a sealed container vacuum pressure detection device, which comprises an operation box and a conveying line arranged on one side of the operation box and used for outputting sealed containers; further comprising: a height adjusting mechanism arranged on one side of the operation box and used for driving the detection mechanism to move up and down; a cross beam frame, one end of which is connected with the height adjusting mechanism and the other end of which is connected with a protective cover located above the conveying line; a detection mechanism arranged in the protective cover and electrically connected with the operation box through a conductive wire; the detection mechanism comprises a scanning probe and a vacuum probe arranged in the protective cover; photoelectric sensors are arranged on both sides of the vacuum probe; the detection device adopts a non-contact online detection mode to realize integrated rapid detection of the shape defects of the iron cover of the sealed container and the vacuum degree in the container, so that the defective sealed containers with air leakage, deformation and sealing failure can be quickly and accurately screened out.

Description

Technical Field

[0001] This invention belongs to the field of airtightness testing technology for sealed containers, and in particular relates to a vacuum pressure testing device for sealed containers. Background Technology

[0002] Food canning is a preservation method that involves sealing food in a container and using a sterilization process to kill most microorganisms, allowing the food to be stored at room temperature for extended periods while maintaining a sealed and vacuum environment. The airtightness of canned food determines its quality and yield rate. Therefore, before packaging canned food, the airtightness of the metal-capped food cans needs to be tested to prevent microbial contamination and spoilage due to leaks, which would reduce the product's yield rate.

[0003] Existing equipment for airtightness testing of sealed containers either uses a vacuum probe to detect the vacuum level inside the container or a scanning device to scan the metal cap of the sealed container for deformation in order to detect whether there is any leakage in the sealed container containing food. Obviously, the above two types of equipment are basically operated and set up independently, and cannot be integrated on the same production line to perform deformation detection and vacuum detection of sealed containers. This not only affects the accuracy and continuity of airtightness testing of sealed containers, but also affects the efficiency of batch testing of sealed containers. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a vacuum pressure testing device for sealed containers, comprising an operating box and a conveyor line arranged on one side of the operating box for outputting sealed containers; it also includes: a height adjustment mechanism installed on one side of the operating box for driving the lifting and lowering movement of the testing mechanism; a crossbeam frame, one end of which is connected to the height adjustment mechanism, and the other end of which is connected to a protective cover located above the conveyor line; a testing mechanism installed inside the protective cover, and which is electrically connected to the operating box via a conductive wire; the testing mechanism includes a scanning probe and a vacuum probe installed inside the protective cover, wherein the scanning probe is used to perform pressure testing on the sealed container; and the vacuum probe is used to perform vacuum testing on the sealed container; photoelectric sensors are provided on both sides of the vacuum probe, and the photoelectric sensors are mounted on the protective cover via a moving adjustment mechanism; and the lid of the sealed container is a metal lid.

[0005] In a preferred embodiment, the height adjustment mechanism includes two upper and lower support blocks fixed to one side of the control box, a first slide rod fixed between the two support blocks, a first lead screw rotatably installed between the two support blocks, and a lifting slider sleeved on the first lead screw and the first slide rod, wherein the lifting slider is connected to the crossbeam frame.

[0006] In a preferred embodiment, an indicator needle is installed on the lifting slider at a position offset from the crossbeam frame, and a scale is installed on the side wall of the control box, with the tip of the indicator needle corresponding to the scale.

[0007] In a preferred embodiment, the scanning probe and the vacuum probe are detachably installed inside the protective cover via two sets of bracket assemblies. The bracket assembly includes a T-shaped block installed on the inner wall of the protective cover and a clamping strip connected to the T-shaped block by screws. The clamping strip has recessed grooves that fit into the housings of the scanning probe and the vacuum probe.

[0008] In a preferred embodiment, the movable adjustment mechanism includes two horizontal bars mounted on the top of the protective cover, with a second guide rod and a second lead screw respectively installed between the two horizontal bars. A movable strip is sleeved on the second guide rod and the second lead screw. The second lead screw and the movable strip are connected by a threaded groove, and the outer end of the second lead screw extends out of one of the horizontal bars and is equipped with a torsion handle. Vertical strips are installed at both ends of the movable strip, and the bottom end of the vertical strip extends downward to the bottom of the protective cover and is equipped with a photoelectric sensor.

[0009] In a preferred embodiment, a lifting adjustment assembly is installed on the movable strip. The lifting adjustment assembly includes a lifting rod movably inserted into the vertical strip, a lifting bar movably installed on the top of the lifting rod, and a third lead screw connected to the lifting bar via a ball nut. The bottom end of the third lead screw is rotatably connected to the movable strip via a rotating sleeve, and a torsion handle is installed on its top. The bottom of the vertical strip has a square hole facing upwards, and a square bar is movably installed inside the square hole. The top of the square bar is connected to the lifting rod, and a photoelectric sensor is installed at its bottom.

[0010] In a preferred embodiment, a square hole is provided through the vertical strip, a docking block is inserted into the square hole, and a lifting rod is movably inserted into the docking block. A countersunk hole is provided on the docking block, and the countersunk hole is arranged perpendicularly to the lifting rod. A movable groove is provided on the protective cover for the docking block to move, so that the docking block is connected to the T-block through a screw installed in the countersunk hole.

[0011] In a preferred embodiment, a square frame block is fixed to the bottom of the square strip, and a sliding block for fixing the photoelectric sensor is slidably disposed on the square frame block. One side of the sliding block is connected to the side wall of the square frame block through a spring, and the other side is rotatably connected to an adjusting screw threaded to the side wall of the square frame block.

[0012] In a preferred embodiment, a pad is installed on the top surface of the protective cover, and a clamping plate is installed on the top surface of the crossbeam frame. The pad, clamping plate, and protective cover are detachably connected by multiple sets of screws.

[0013] The present invention has the following beneficial effects: First, the testing equipment of the present invention is a fully automated multi-functional testing system with a testing speed of up to 1500 cans / minute. It adopts a non-contact online testing method to achieve integrated and rapid testing of the shape defects of the iron cap of the sealed container and the vacuum degree inside the container, thereby facilitating the rapid and accurate screening out of defective sealed containers with air leakage, deformation and sealing failure. Secondly, through the cooperation of the scanning probes and vacuum probes installed on the left and right sides inside the protective cover, the scanning probes use scanning technology to detect the deformation of the lid of the container with the iron lid, and judge whether there is a quality defect in the sealed container (whether the metal lid has a shape defect). The vacuum probes use electromagnetic acoustic technology to detect quality defects in the container with the iron lid due to low pressure or insufficient vacuum (whether the internal vacuum is stable). Thus, it is possible to perform a combined inspection of internal indicators and external performance of sealed containers filled with food, so as to quickly and accurately screen out defective sealed containers with air leakage, deformation and sealing failure. Third, through the cooperation of symmetrical photoelectric sensors on both sides of the vacuum probe, the photoelectric sensors can adjust the opening and closing of the vacuum probe according to the position of the shadow of the iron lid of the sealed container. This can prevent the vacuum probe from failing to work quickly and accurately due to malfunction or inability to work in a timely manner, thus affecting the accuracy and continuity of the sealed container detection.

[0014] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a first-view diagram showing the cooperation between the detection equipment and the conveyor line according to an embodiment of the present invention; Figure 2 This is a second-view diagram showing the cooperation between the detection equipment and the conveyor line in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of the detection device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the height adjustment mechanism according to an embodiment of the present invention; Figure 5This is a schematic diagram illustrating the cooperation between the crossbeam frame and the protective cover according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the protective cover according to an embodiment of the present invention; Figure 7 This is a diagram showing the cooperative state of the movable adjustment mechanism and the lifting adjustment assembly according to an embodiment of the present invention. Figure 8 This is a cross-sectional view of a vertical strip according to an embodiment of the present invention.

[0017] In the diagram: 1. Control box; 2. Conveyor line; 3. Height adjustment mechanism; 31. Support block; 32. First slide rod; 33. First lead screw; 34. Lifting slider; 35. Indicator needle; 36. Scale; 4. Crossbeam frame; 5. Protective cover; 51. Moving slot; 52. Pad; 53. Clamping plate; 6. Testing mechanism; 61. Scanning probe; 62. Vacuum probe; 63. Photoelectric sensor; 64. T-block; 65. Clamping strip; 7. Moving adjustment mechanism; 71. Horizontal bar; 72. Second guide rod; 73. Second lead screw; 74. Moving strip; 75. Torque handle; 76. Vertical strip; 761. Square hole; 762. Connecting square hole; 8. Lifting and adjusting assembly; 81. Lifting rod; 82. Lifting bar; 83. Third lead screw; 84. Rotating sleeve; 85. Square bar; 86. Connecting block; 861. Countersunk hole; 87. Square block; 88. Sliding block; 89. Adjusting screw. Detailed Implementation

[0018] 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.

[0019] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0020] Please see Figures 1-8As shown, this invention is a vacuum pressure testing device for a sealed container, including an operating box 1 and a conveyor line 2 arranged on one side of the operating box 1 for outputting sealed containers; it also includes: a height adjustment mechanism 3, installed on one side of the operating box 1, for driving the lifting and lowering movement of a testing mechanism 6; a crossbeam frame 4, one end connected to the height adjustment mechanism 3, and the other end connected to a protective cover 5 located above the conveyor line 2; the testing mechanism 6, installed inside the protective cover 5, and electrically connected to the operating box 1 via a conductive wire; the testing mechanism 6 includes a scanning probe 61 and a vacuum probe 62 installed inside the protective cover 5, wherein the scanning probe 61 is used for pressure testing of the sealed container; and the vacuum probe 62 is used for vacuum testing of the sealed container; photoelectric sensors 63 are provided on both sides of the vacuum probe 62, and the photoelectric sensors 63 are mounted on the protective cover 5 via a moving adjustment mechanism 7; and the sealed container is a sealed container with a metal cap. It should be noted that the vacuum probe 62 uses electromagnetic acoustic technology to detect quality defects in sealed containers with iron lids caused by low pressure or insufficient vacuum. When the sealed container passes through the vacuum detection probe, the probe emits high-energy electromagnetic waves to non-contactly impact the metal lid of the container. The lid emits a sound upon impact, and the sound has a certain proportional relationship with the vacuum level inside the container. The presence of quality defects in the container is determined based on the sound using acoustic technology. The unique sound analysis method can achieve high accuracy and continuity. The scanning probe 61 uses scanning technology to detect the deformation of the lid of the iron-capped sealing container. The deformation of the lid is used to determine whether there are quality defects in the sealing container. When the sealing container passes the curved scanning probe 61, the probe continuously detects the distance between the lid and the container and outputs a proportional analog voltage. The analog voltage is processed by the data processing system to generate a numerical value of the lid's shape quality. The unique data analysis method can achieve high accuracy and continuity. The vacuum pressure testing device of the present invention requires the sealed container lid to be tested to be a metal lid such as an iron lid or an iron anti-theft lid, so that the vacuum probe 62 can accurately determine whether the container has quality defects based on the sound emitted by the metal lid when it is impacted. The bottle body of the sealed container is preferably a metal iron can or a glass jar. The operation box 1 is installed in front of the conveyor line 2, and the operation box 1 is equipped with a display panel. The scanning probe 61 is located near the inlet of the conveyor line 2, and the vacuum probe 62 is located to the left of the scanning probe 61. The vacuum pressure testing device of this invention is used in the following specific way, taking a glass bottle with an iron cap as an example of a sealed container. First, equipment adjustment: (1) First, place the sealed container to be tested directly under the two probes. Then, adjust the height of the crossbeam frame 4 through the height adjustment mechanism 3, and then adjust the height of the scanning probe 61 and vacuum probe 62 installed in the protective cover 5 so that the distance between the two probes (note, the two probes are the abbreviations of scanning probe 61 and vacuum probe 62) and the bottle cap of the sealed container is maintained at 3-5mm. Then, adjust the position of the two symmetrical photoelectric sensors 63 through the moving adjustment mechanism 7, and adjust the photoelectric sensor 63 to the lower edge of the top of the sealed container (note, the lower edge of the iron cover). The function of the symmetrical photoelectric sensor 63 is that when the sealed container moves between the symmetrical photoelectric sensors 63, the photoelectric emitted by one of the photoelectric sensors 63 will be blocked by the iron cover (note, the photoelectric sensor 63 is equivalent to a photoelectric generator), and the shadow part of the iron cover will block the other photoelectric sensor 63 (note, equivalent to a receiver), so that the photoelectric sensor 63 cannot receive the signal of the corresponding other photoelectric sensor 63. Then the vacuum probe 62 will start working according to the signal. (2) After adjusting the positions of the two photoelectric sensors 63, take a sealed container containing a normal product and a defective product, place the normal product directly below the vacuum probe 62 while the conveyor line 2 is stationary, and then click the test and debugging page on the main interface on the display panel and click test to open. After the test is turned on, there will be an electromagnetic wave knocking on the bottle cap below the vacuum probe 62. The operator returns to the main interface and observes the display panel to detect the vacuum degree and amplitude value of the normal product. Then place the defective product under the vacuum probe 62, observe the display panel for the vacuum level and amplitude value of the defective product, and set the low threshold and high threshold in the configuration. (3) Turn on the pressure detection switch in the lower right corner of the main interface of the display panel. With the conveyor line 2 disabled, place normal products and defective products in sequence directly below the scanning probe 61. Click the scanning waveform in the lower right corner of the main interface to change the configuration. Observe the real-time value at the bottom of the scan waveform graph for normal products, and observe the real-time value for defective products. Compare the differences in real-time values ​​between the two bottle types, and adjust the low and high thresholds related to pressure in the configuration settings. Then open conveyor line 2 so that the sealing container passes directly under the scanning probe 61. Click on the scanning waveform in the configuration change and adjust the offset distance parameter to find the lowest point in the waveform (Note: When finding the waveform, you can increase the scanning distance in the configuration change and then decrease it after finding the waveform). After setting it up, reseal the container and then observe the surface values ​​of normal and defective products on the operation panel to see if defective products can be removed by the set low threshold parameters. Second, batch testing: The sealed containers to be tested are placed sequentially on the starting conveyor line 2, which continuously moves the sealed containers to below the protective cover 5. The scanning probe 61 first performs pressure testing on the sealed containers, and then observes the main interface of the display panel. If the surface curvature value of the sealed container being tested is within the low threshold and high threshold range, it is a qualified product; if it is not within the range, it is an unqualified product. When the conveyor line 2 continues to transport the sealed container after pressure detection to below the vacuum probe 62, the symmetrical photoelectric sensor 63 will work to detect whether the iron cap of the sealed container to be tested has moved directly below the vacuum probe 62. Then the vacuum probe 62 will work, and there will be an electromagnetic wave knocking sound under the bottle cap. Then observe the main interface of the display panel to see if the vacuum value of the sealed container being tested is within the low threshold and high threshold range. If it is within the range, it is a qualified product; if it is not within the range, it is a non-qualified product. Defective products are rejected: When scanning probe 61 and vacuum probe 62 detect unqualified sealed containers, the conveyor line 2 will transport the unqualified products to the tail end of the conveyor line 2, and the rejection equipment installed on the conveyor line 2 will reject the unqualified sealed containers (the rejection equipment can be mechanical equipment such as a robotic arm). The qualified sealed containers will be transported by the conveyor line 2 to the next processing step for further processing.

[0021] See Figure 3 and Figure 4 As shown, the height adjustment mechanism 3 includes two upper and lower support blocks 31 fixed on one side of the operation box 1, a first slide rod 32 fixed between the two support blocks 31, a first lead screw 33 rotatably installed between the two support blocks 31, and a lifting slider 34 sleeved on the first lead screw 33 and the first slide rod 32, and the lifting slider 34 is connected to the crossbeam frame 4. Furthermore, an indicator needle 35 is installed on the lifting slider 34 at a position offset from the crossbeam frame 4, and a scale 36 is installed on the side wall of the operation box 1, with the tip of the indicator needle 35 corresponding to the scale 36. In a preferred embodiment of the present invention, a servo motor that is self-locking and used to drive the first lead screw 33 to rotate is fixed on one of the support blocks 31. The first slide bar 32 is disposed on both sides of the first lead screw 33 and is slidably connected to the lifting slider 34. The first lead screw 33 is connected to the lifting slider 34 through a lead screw nut pair. The indicator needle 35 is located above the crossbeam frame 4. Therefore, when the height of the protective cover 5 needs to be adjusted, the servo motor can be activated by clicking the operation switch on the display panel. This will drive the first lead screw 33 to move the lifting slider 34 up and down between the two support blocks 31. Consequently, the crossbeam frame 4 will move the two probes inside the protective cover 5 up and down, and the indicator needle 35 can move along the scale 36, making it easy for the operator to observe the adjusted height of the protective cover 5 and thus make it easy to adjust the distance between the two probes and the bottle cap of the sealing container.

[0022] See Figure 5 and Figure 6 As shown, the scanning probe 61 and the vacuum probe 62 are detachably installed inside the protective cover 5 by two sets of bracket assemblies. The bracket assembly includes a T-shaped block 64 installed on the inner wall of the protective cover 5 and a clamping strip 65 connected to the T-shaped block 64 by screws. The clamping strip 65 has a recessed groove that fits into the housing of the scanning probe 61 and the housing of the vacuum probe 62. In a preferred embodiment of the present invention, two clamping strips 65 are provided. The clamping strip 65 located inside the probe can be connected to the T-block 64 by welding, while the clamping strip 65 located outside the probe can be detachably connected to the T-block 64 by screws. Therefore, when it is necessary to disassemble, replace or repair the probe that has been used for a long time, it is only necessary to remove the screws on the outer clamping strip 65 to release the clamping strip 65 from the contact with the probe housing, thereby facilitating the removal of the probe from the protective cover 5. The recessed groove on the clamping strip 65 can be matched with the cylindrical probe housing, and a rubber layer can also be installed in the recessed groove to protect the probe housing.

[0023] See Figure 6 and Figure 7 As shown, the movable adjustment mechanism 7 includes two horizontal bars 71 mounted on the top of the protective cover 5, and a second guide rod 72 and a second lead screw 73 are respectively installed between the two horizontal bars 71. A movable strip 74 is sleeved on the second guide rod 72 and the second lead screw 73. The second lead screw 73 and the movable strip 74 are connected by a threaded groove. The outer end of the second lead screw 73 extends out of one of the horizontal bars 71 and is equipped with a torsion handle 75. Vertical strips 76 are installed at both ends of the movable strip 74, and the bottom end of the vertical strip 76 extends downward to the bottom of the protective cover 5 and is equipped with a photoelectric sensor 63. As a preferred embodiment of the present invention, when it is necessary to adjust the position of the two symmetrical photoelectric sensors 63 in the left and right directions below the protective cover 5, so that they can accurately cooperate with the vacuum probe 62 to detect the vacuum degree of the sealed container. This solution uses welding or other methods to fix and install horizontal bars 71 that are symmetrical on the left and right sides on the top of the protective cover 5, while two second guide rods 72 that are symmetrical in front and behind are located on both sides of the second lead screw 73, and the movable strip 74 is slidably connected to the two second guide rods 72. Furthermore, by twisting the torsion handle 75 near the end of the protective cover 5, the second lead screw 73 can be rotated between the horizontal bars 71. This causes the moving bar 74 to drive the two vertical bars 76 to move horizontally along the left and right sides of the protective cover 5. This facilitates the adjustment of the positions of the two symmetrical photoelectric sensors 63 below the protective cover 5, enabling them to accurately cooperate with the vacuum probe 62 to detect the vacuum level of the sealed container.

[0024] See Figures 6-8 As shown, a lifting adjustment assembly 8 is installed on the movable strip 74. The lifting adjustment assembly 8 includes a lifting rod 81 that is movably inserted into the vertical strip 76, a lifting bar 82 that is movably installed on the top of the lifting rod 81, and a third lead screw 83 that is connected to the lifting bar 82 through a ball nut. The bottom end of the third lead screw 83 is rotatably connected to the movable strip 74 through a rotating sleeve 84, and a torsion handle 75 is installed on its top. The bottom of the vertical strip 76 has a square hole 761 facing upwards, and a square strip 85 is movably installed in the square hole 761. The top of the square strip 85 is connected to the lifting rod 81, and a photoelectric sensor 63 is installed at its bottom. In a preferred embodiment of the present invention, the height adjustment mechanism 3 can only adjust the overall height of the vacuum probe 62, the scanning probe 61 and the photoelectric sensor 63 simultaneously, so that the distance between the two probes and the bottle cap of the sealed container is the same. Since the symmetrical photoelectric sensor 63 needs to be aligned with the edge of the bottle cap, and since the size of the sealed container to be detected and the thickness of the bottle cap are not the same, the height position of the photoelectric sensor 63 needs to be adjusted separately so that the symmetrical photoelectric sensor 63 can accurately send an electrical signal, so that the vacuum probe 62 can start quickly and accurately. This design involves vertically sliding the lifting rod 81 into the vertical strip 76. The top of the lifting rod 81 is detachably connected to the lifting bar 82 via a threaded rod and nut. Therefore, when it is necessary to adjust the height of the symmetrical photoelectric sensor 63 to match the caps of sealing containers of different thicknesses, the vertical third lead screw 83 is rotated by turning the torsion handle 75. This causes the lifting bar 82 to move up and down above the moving strip 74, allowing the two symmetrical vertical lifting rods 81 to move up and down within the vertical strip 76. This facilitates the movement of the square bar 85, which is slidably installed within the square hole 761. Consequently, the symmetrical photoelectric sensor 63 can move up and down synchronously, ensuring that the shadow cast by the cap of the sealing container below the vacuum probe 62 is accurately aligned with the adjusted photoelectric sensor 63. This allows the photoelectric sensor 63 to transmit electrical signals to the vacuum probe 62 via the control system, enabling the vacuum probe 62 to accurately and quickly detect the vacuum level of the conveyed sealing container.

[0025] See Figure 7 and Figure 8 As shown, a square hole 762 is provided through the vertical strip 76, and a docking block 86 is inserted into the square hole 762. A lifting rod 81 is movably inserted into the docking block 86. A countersunk hole 861 is provided on the docking block 86, and the countersunk hole 861 is arranged perpendicular to the lifting rod 81. A movable groove 51 is provided on the protective cover 5 for the docking block 86 to move, so that the docking block 86 is connected to the T-block 64 through the screw installed in the countersunk hole 861. As a preferred embodiment of the present invention, in order to facilitate the testing equipment of this application to be matched with sealing containers of different sizes for testing and to improve the testing efficiency, for example, when it is necessary to test a large-diameter sealing container, it is necessary to adjust the distance between the vacuum probe 62 and the scanning probe 61 to prevent the small distance between the two probes from causing the sealing containers placed on the conveyor line 2 to become crowded, which would affect the accuracy of the sealing container testing. Therefore, when it is necessary to adjust the distance between the vacuum probe 62 and the scanning probe 61, the torsion handle 75 at the end of the second lead screw 73 can be turned so that the second lead screw 73 drives the moving strip 74 to slide on the upper surface of the protective cover 5. Since the T-shaped block 64 connected to the vacuum probe 62 is connected to the docking block 86 by screws, and the docking block 86 is inserted into the docking square hole 762 and is limited in front and back by the vertically inserted lifting rod 81, the symmetrical vertical strip 76 sliding left and right on both sides of the protective cover 5 will simultaneously drive the T-shaped block 64 to slide back and forth through the docking block 86, which facilitates the horizontal back and forth sliding of the clamped vacuum probe 62 in the protective cover 5, and thus facilitates the adjustment of the distance between the two probes. For example, when inspecting large-diameter sealed containers, the distance between the two probes can be increased to prevent the sealed containers from crowding when placed sequentially on conveyor line 2, thus enabling accurate and rapid inspection of large-sized sealed containers. When inspecting small-diameter sealed containers, the distance between the two probes can be reduced to allow the sealed containers on conveyor line 2 to be placed in a compact manner, thereby accelerating the efficiency of batch inspection of small-diameter sealed containers. When the horizontal position of the vacuum probe 62 is adjusted, the vertical strip 76 will drive the symmetrical photoelectric sensor 63 to move horizontally in sync through the square strip 85, so that the symmetrical photoelectric sensor 63 can always cooperate with the vacuum probe 62 to achieve rapid and accurate detection of the conveyed sealing container. Since the hexagonal screw installed in the countersunk hole 861 is located inside the lifting rod 81, it means that when the lifting rod 81 is inserted into the mating block 86, it will not interfere with the screw. Furthermore, the mating block 86 and the mating square hole 762 are matched in size, so that when the lifting rod 81 moves up and down in the vertical strip 76, the mating block 86 will not move in the mating square hole 762. This improves the stability and firmness of the adjusted vacuum probe 62 installed in the protective cover 5. Since the top of the lifting rod 81 is detachably connected to the lifting strip 82 through nuts and washers, when the lifting rod 81 is removed from the lifting strip 82 and pulled out from the vertical strip 76, the screw in the countersunk hole 861 can be removed, and the T-block 64, the clamping strip 65, and the vacuum probe 62 can be disassembled or assembled simultaneously. Meanwhile, when the lifting rod 81 moves up and down within the vertical strip 76, the docking block 86 and the internal screws will not interfere with its movement, thus facilitating fine-tuning of the height of the symmetrical photoelectric sensor 63. Since the thickness of the docking block 86 is the same as the width of the upper and lower openings of the moving groove 51, the docking block 86 can slide within the moving groove 51 and also provide gravity support for the T-block 64, thereby enabling the vacuum probe 62 to be stably installed and used within the protective cover 5.

[0026] See Figure 6 and Figure 7 As shown, a square block 87 is fixed at the bottom of the square strip 85, and a sliding block 88 for fixing the photoelectric sensor 63 is slidably arranged on the square block 87. One side of the sliding block 88 is connected to the side wall of the square block 87 through a spring, and the other side is rotatably connected to the adjusting screw 89 threadedly connected to the side wall of the square block 87. In a preferred embodiment of the present invention, the photoelectric sensor 63 is detachably mounted on the sliding block 88, allowing the photoelectric sensor 63 to slide within the square block 87 via the sliding block 88. Furthermore, the end of the adjusting screw 89 is rotatably connected to the side of the sliding block 88 via a bushing. Therefore, when it is necessary to finely adjust the photoelectric sensor 63 in the left and right directions, the operator can twist the handle of the adjusting screw 89 on the side of the square block 87 according to the detection needs, causing it to drive the sliding block 88 to slide horizontally left and right within the square block 87. At this time, the spring on the other side will be stretched or compressed, which facilitates the fine-tuning of the photoelectric sensor 63 mounted on the square bar 85. This allows the finely adjusted photoelectric sensor 63 to accurately correspond to the shaded part of the bottle cap of the sealed container, thereby achieving better matching with the vacuum probe 62 and performing vacuum detection on the continuously conveyed sealed containers. See Figure 5 As shown, a pad 52 is installed on the top surface of the protective cover 5, and a clamping plate 53 is installed on the top surface of the crossbeam frame 4. The pad 52, the clamping plate 53 and the protective cover 5 are detachably connected by multiple sets of screws. The crossbeam frame 4 is detachably connected to the protective cover 5 by the pad 52, the clamping plate 53 and multiple screws, which facilitates the quick assembly or disassembly of the protective cover 5 and the detection mechanism 6 with the crossbeam frame 4.

[0027] The vacuum pressure detection equipment installed in this solution has the following effects: First, through the cooperation of the scanning probe 61 and vacuum probe 62 installed on the left and right sides inside the protective cover 5, the scanning probe 61 uses scanning technology to detect the deformation degree of the lid of the container with the iron lid, and judges whether there is a quality defect in the sealed container (whether the metal lid has a shape defect). The vacuum probe 62 uses electromagnetic acoustic technology to detect the quality defects of the container with the iron lid due to low pressure or insufficient vacuum (whether the internal vacuum is stable). Thus, it is possible to perform a joint inspection of the internal indicators and external performance of the sealed container filled with food, so as to quickly and accurately screen out the defective sealed containers that leak, deteriorate, or fail to seal. Secondly, through the cooperation of the symmetrical photoelectric sensors 63 on both sides of the vacuum probe 62, the photoelectric sensors 63 can adjust the opening and closing of the vacuum probe 62 according to the position of the shadow of the iron lid of the sealing container. This can prevent the vacuum probe 62 from failing to work quickly and accurately due to malfunction or failure to work in time, which would affect the accuracy and continuity of the sealing container detection.

[0028] Third, through the cooperation of the movable adjustment mechanism 7 and the lifting adjustment component 8 set on the protective cover 5, the movable adjustment mechanism 7 can drive the vacuum probe 62 and the photoelectric sensor 63 to move synchronously left and right through the lifting adjustment component 8, so as to adjust the left and right distance between the two probes, while ensuring that the symmetrical photoelectric sensor 63 always corresponds to the vacuum probe 62, so as to achieve accurate and rapid airtightness detection of sealed containers of different diameters. The lifting adjustment component 8 can also adjust the synchronous lifting and lowering movement of the symmetrical photoelectric sensor 63 independently, so that the symmetrical photoelectric sensor 63 can contact the lower edge of the iron cover of different thicknesses, so as to accurately provide the start signal to the vacuum probe 62.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vacuum pressure testing device for sealing containers, comprising an operating box and a conveyor line arranged on one side of the operating box for outputting sealed containers; characterized in that, Also includes: The height adjustment mechanism is installed on one side of the control box and is used to drive the detection mechanism to move up and down. The crossbeam is connected at one end to the height adjustment mechanism and at the other end to the protective cover located above the conveyor line; The testing mechanism is housed inside a protective cover and is connected to the control box via conductive wires. The detection mechanism includes a scanning probe and a vacuum probe installed inside a protective cover. The scanning probe is used to detect the deformation of the lid of the sealed container, and the vacuum probe is used to detect the vacuum level of the sealed container. Photoelectric sensors are provided on both sides of the vacuum probe, and the photoelectric sensors are mounted on the protective cover through a moving adjustment mechanism. The lid of the sealing container is a metal lid.

2. The vacuum pressure testing device for a sealing container according to claim 1, characterized in that, The height adjustment mechanism includes two upper and lower support blocks fixed to one side of the control box, a first slide rod fixed between the two support blocks, a first lead screw rotatably installed between the two support blocks, and a lifting slider sleeved on the first lead screw and the first slide rod, wherein the lifting slider is connected to the crossbeam frame.

3. The vacuum pressure testing device for a sealing container according to claim 2, characterized in that, An indicator needle is installed on the lifting slider at a position offset from the crossbeam frame, and a scale is installed on the side wall of the control box, with the tip of the indicator needle corresponding to the scale.

4. The vacuum pressure testing device for a sealing container according to claim 1, characterized in that, The scanning probe and the vacuum probe are detachably installed inside the protective cover via two sets of bracket assemblies. The bracket assembly includes a T-shaped block installed on the inner wall of the protective cover and a clamping strip connected to the T-shaped block by screws. The clamping strip has recessed grooves that fit into the housings of the scanning probe and the vacuum probe.

5. The vacuum pressure testing device for a sealing container according to claim 4, characterized in that, The movable adjustment mechanism includes two horizontal bars installed on the top of the protective cover, and a second guide rod and a second lead rod are respectively installed between the two horizontal bars. A movable strip is sleeved on the second guide rod and the second lead rod. The second lead rod and the movable strip are connected by a threaded groove. The outer end of the second lead rod extends out of one of the horizontal bars and is equipped with a torsion handle. Vertical strips are installed at both ends of the movable strip, and the bottom end of the vertical strip extends downward to the bottom of the protective cover and is equipped with a photoelectric sensor.

6. The vacuum pressure testing device for a sealing container according to claim 5, characterized in that, The movable strip is equipped with a lifting adjustment assembly, which includes a lifting rod that is movably inserted into the vertical strip, a lifting bar that is movably installed on the top of the lifting rod, and a third lead screw that is connected to the lifting bar through a ball nut. The bottom end of the third lead screw is rotatably connected to the movable strip through a rotating sleeve, and a torsion handle is installed on its top. The bottom of the vertical strip has a square hole facing upwards, and a square bar is movably installed inside the square hole. The top of the square bar is connected to the lifting rod, and a photoelectric sensor is installed at its bottom.

7. The vacuum pressure testing device for a sealing container according to claim 6, characterized in that, A square hole is provided through the vertical strip, into which a docking block is inserted. A lifting rod is movably inserted into the docking block. A countersunk hole is provided on the docking block, and the countersunk hole is arranged perpendicular to the lifting rod. A movable groove is provided on the protective cover for the docking block to move, so that the docking block is connected to the T-block through a screw installed in the countersunk hole.

8. The vacuum pressure testing device for a sealing container according to claim 7, characterized in that, A square frame block is fixed at the bottom of the square strip, and a sliding block for fixing the photoelectric sensor is slidably arranged on the square frame block. One side of the sliding block is connected to the side wall of the square frame block through a spring, and the other side is rotatably connected to an adjusting screw threaded to the side wall of the square frame block.

9. The vacuum pressure testing device for a sealing container according to claim 1, characterized in that, A pad is installed on the top surface of the protective cover, and a clamping plate is installed on the top surface of the crossbeam frame. The pad, clamping plate, and protective cover are detachably connected by multiple sets of screws.

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