Food packaging bag sealing detection system and method

Abstract

The present invention relates to the technical field of sealing detection, and discloses a food packaging bag sealing detection system and method, wherein the food packaging bag sealing detection system comprises: a conveyor and a detection mechanism, wherein the detection mechanism is used to randomly perform sealing detection on the food packaging bags on the conveyor, and the detection mechanism comprises a grasping component, a detection component and an auxiliary pushing component; wherein the grasping component comprises a transfer component and a suction cup component. The grasping component provided in the present invention has two use states, and when it is in the grasping state, it can realize the automatic clamping function of the food packaging bag, and can complete the transfer of the food packaging bag from the conveyor to the detection component, and when it switches from the grasping state to the pressing state, it can generate downward pressure on the food packaging bag, which can promote the automatic separation of the food packaging bag and the suction cup on the one hand, and can solve the problem that the food packaging bag and the suction cup are difficult to separate due to the air pressure of the suction cup.

Description

Technical Field

[0001] The present invention relates to the technical field of sealing detection, and more specifically, to a food packaging bag sealing detection system and method. Background Art

[0002] In the process of food production and processing, in order to ensure that the packaged food has a long shelf life, it is often necessary to perform a sealing test on the packaged food packaging bags. At present, the common methods for testing the sealing of food packaging bags are mostly the bubbling method and the water decompression method. For example, the announcement number CN221350426U discloses a food packaging bag sealing test device, including a base, a pressing mechanism and a heating mechanism. Through the set pressing mechanism, the food packaging bag that needs to be tested for sealing can be placed in a test barrel filled with test water, and then the motor is started, and the rotating screw is driven by the motor to rotate, thereby controlling the lifting plate threadedly connected to the rotating screw to move, and the lifting plate drives the water pressure plate to move downward.

[0003] In the above-mentioned prior art, although it can realize the sealing detection of food packaging bags, it is necessary to manually put the food packaging bags into the detection container during the detection, and it is necessary to manually take them out after the detection is completed. It is too dependent on manual operation, which is not convenient when used, and the detection speed is relatively slow, which is not suitable for the requirements of large-scale random sampling on the production line. In view of this problem, the prior art also has a solution, such as the announcement number CN221376969U, a food packaging bag sealing detection device, including a bottom plate, a fixedly connected support frame is mounted on the bottom plate, and a detection box is provided on one side of the top of the bottom plate; a driving component, the driving component is arranged on the support frame, and the driving component includes a mounting plate, and the top of the mounting plate is fixedly connected to the inner top of the support frame. Although the device realizes the automatic clamping function of the food packaging bag, it adopts the clamping method of the clamping plate, so that it is easy to cause the position with the sealing problem to be blocked during the clamping process of the outer side of the food packaging bag, which may cause deviation in the detection result. Therefore, it is necessary to provide a food packaging bag sealing detection system that has both automatic clamping function and does not affect the detection result. Summary of the invention

[0004] The purpose of the present invention is to provide a food packaging bag sealing detection system and method to solve the above-mentioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] The present invention provides a food packaging bag sealing detection system, comprising: a conveyor and a detection mechanism, wherein the detection mechanism is used to randomly perform sealing detection on food packaging bags on the conveyor, and the detection mechanism comprises a grabbing component, a detection component and an auxiliary pushing component;

[0007] Wherein, the grabbing component comprises a transfer component and a suction cup component, the transfer component is connected to the outer side of the conveyor, one end of the transfer component is connected to the suction cup component, which is used to drive the suction cup component to perform displacement between the conveyor and the detection component, the suction cup component adopts a negative pressure adsorption grabbing method to transfer the food packaging bag on the conveyor to the detection component, the suction cup component has two use states of grabbing and pressing, the suction cup component comprises a sealing cover plate adapted to the opening of the detection component, when the suction cup component transfers the food packaging bag to the inside of the detection component, the sealing cover plate just seals the opening of the detection component, and the suction cup component switches from the grabbing state to the pressing state, after releasing the adsorption effect on the food packaging bag, the food packaging bag is simultaneously pressed downward into the detection component, so that the food packaging bag is in a preset posture to be detected;

[0008] The detection component is located on one side of the grabbing component and is used to perform a water pressure reduction type sealing test on the food packaging bag;

[0009] The auxiliary pushing component is arranged in the detection component. After the detection is completed, the auxiliary pushing component contacts the lower surface of the food packaging bag to push the detected food packaging bag to the entrance position of the detection component, so that the suction cup assembly after switching to the grasping state can grasp the detected food packaging bag and transfer it to the outside of the detection component.

[0010] As a further optimization scheme of the present invention, the transfer assembly includes a support frame, which is located in the middle position of the conveyor, a drive motor is rotatably installed on the upper end of the support frame, a swing arm is rotatably installed on the top surface of the support frame, the drive end of the drive motor is fixed to the rotating end of the swing arm, and the suction cup assembly is connected to the end of the swing arm away from the drive motor.

[0011] As a further optimization scheme of the present invention, the suction cup assembly includes a lifting member, a suction member and a pressing member, the fixed end of the lifting member is connected to the end of the swing arm, and the telescopic end of the lifting member is connected to the pressing member, the suction member is connected to the pressing member, and the lifting member is used to drive the suction member and the pressing member to move up and down together, and the suction member grabs the food packaging bag through suction, and after the suction member releases the grabbing effect on the food packaging bag, the pressing member generates a downward pressing force on the food packaging bag, so that the food packaging bag is separated from the suction member and moves down to the detection position preset by the detection component.

[0012] As a further optimization solution of the present invention, the lifting member includes a cylinder, the fixed end of the cylinder is fixed to the end of the swing arm, the telescopic end of the cylinder is fixedly connected to a connecting plate, and the connecting plate is fixed to one end of the pressing member;

[0013] The suction member includes an air pump, an air pipe, a suction cup and a connecting spring. The air pump is fixedly installed at the end of the swing arm, and the suction cup is located below the connecting plate. The top of the air pipe is fixed to the connecting end of the air pump, and the bottom end of the air pipe is slidably connected to the suction cup, and the bottom end of the air pipe extends downward from the top of the suction cup to the inside of the suction cup. The connecting spring is sleeved on the outside of the air pipe, and the two ends of the connecting spring are respectively fixed to the bottom surface of the swing arm and the top surface of the connecting plate. The air pipe is a flexible tube.

[0014] As a further optimization scheme of the present invention, the pressing part includes a sliding sleeve and a plurality of rotating rods. The sliding sleeve is arranged on the outside of the trachea, and its outer side is slidably connected to the suction cup. The top end of the sliding sleeve is fixed to the bottom surface of the connecting plate, and its bottom end extends downward into the suction cup. The circumference of the plurality of rotating rods is evenly distributed in the suction cup, and the top ends thereof are hinged to the bottom end of the sliding sleeve, and the bottom ends thereof are fitted with the inner wall of the suction cup. Support springs are fixedly installed between the plurality of rotating rods and the sliding sleeve.

[0015] As a further optimization scheme of the present invention, the auxiliary pushing component includes a pushing component and a pressing component. The pushing component is slidably arranged in the detection component. The pushing component has an elastic telescopic function. When the pushing component is in a naturally extended state, the movable end thereof is located at the entrance position of the detection component. The pressing component is connected to the sliding sleeve. When the sealing cover plate moves downward and the opening of the detection component is closed, the pressing component first squeezes the pushing component. When the grasping component switches from the grasping state to the pressing state, the pressing component is driven to squeeze the pushing component again to separate the bottom surface of the food packaging bag from the pushing component.

[0016] As a further optimization scheme of the present invention, the pushing member includes a filter plate and two sliding rods, the filter plate is located in the detection component, the two sliding rods are symmetrically fixedly installed in the detection component, the two ends of the filter plate are respectively slidably connected to the outer sides of the two sliding rods, the lower ends of the outer sides of the two sliding rods are sleeved with return springs, and the two ends of the return springs are respectively fixed to the filter plate and the sliding rod, and the upper end of the sliding rod is slidably installed with a movable sleeve, and the bottom end of the movable sleeve is fixed to the top surface of the filter plate.

[0017] As a further optimization scheme of the present invention, the pressing member includes two extrusion rods, two inclined plane blocks and two driving rods. The two extrusion rods are symmetrically slidably installed inside the sealing cover plate, one end of which extends downward to the bottom of the sealing cover plate, and the other end extends into the suction cup. The two driving rods are symmetrically hingedly installed at the lower end of the sliding sleeve, and the ends of the two driving rods away from the sliding sleeve are hinged to the ends of the two extrusion rods respectively. A pressure spring is fixedly installed between the extrusion rods and the sealing cover plate, and the ends of the two extrusion rods located at the bottom of the sealing cover plate are provided with inclined surfaces matched with the inclined plane blocks, and the two inclined plane blocks are correspondingly fixedly installed at the top ends of the two movable sleeves, and the two inclined plane blocks are aligned up and down with the two inclined planes.

[0018] As a further optimization scheme of the present invention, the detection component includes a detection cylinder, a vacuum pump and an air pressure detection component. The detection cylinder and the vacuum pump are both fixedly installed on one side of the support frame. The connecting end of the vacuum pump is connected to the detection cylinder through a pipe. The air pressure detection component is installed inside the detection cylinder and is used to detect the air pressure changes inside the detection cylinder.

[0019] A method for detecting the sealing of a food packaging bag comprises the following steps:

[0020] S1. Randomly grab a food packaging bag from the conveyor through the grabbing component and transfer it to the detection component;

[0021] S2. After the food packaging bag enters the detection component, the gripping component drives the sealing cover plate to seal the top opening of the detection component, and then the gripping component switches from the gripping state to the pressing state, and simultaneously pushes the food packaging bag to a preset posture to be detected, and performs vacuum detection through the detection component;

[0022] S3, after the detection is completed, when the grasping component switches from the pressing state to the grasping state, the auxiliary pushing component generates an upward thrust on the bottom surface of the food packaging bag after the detection, and pushes the food packaging bag to the entrance of the detection component, and the grasping component grasps the food packaging bag after the detection and transfers it to the outside of the detection component;

[0023] S4. If the test result of the food packaging bag is qualified, the food packaging bag is transferred to the conveyor through the grabbing component. If the test result is unqualified, the food packaging bag is transferred to the recycling place.

[0024] The beneficial effects of the present invention are:

[0025] The grabbing component provided in the present invention has two usage states. When it is in the grabbing state, it can realize the automatic clamping function of the food packaging bag and complete the transfer of the food packaging bag from the conveyor to the detection component. When it switches from the grabbing state to the pressing state, it can generate downward pressure on the food packaging bag. On the one hand, it can promote the automatic separation of the food packaging bag and the suction cup, and solve the problem that the food packaging bag and the suction cup are difficult to separate due to the air pressure of the suction cup. On the other hand, it can be used as a pressing structure to press the food packaging bag and immerse it in water, so that the food packaging bag is in a preset position to be detected. When pressing, the contact area between the grabbing component and the upper surface of the food packaging bag is small, and it is not easy to block the outside of the food packaging bag, so the impact on the detection result is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a food packaging bag sealing detection system provided by the present invention;

[0027] Figure 2 It is a structural schematic diagram of a detection mechanism in a food packaging bag sealing detection system provided by the present invention;

[0028] Figure 3 It is a side view between a grabbing component and a transfer component in a food packaging bag sealing detection system provided by the present invention;

[0029] Figure 4 It is a structural schematic diagram between a grabbing component and a swing arm in a food packaging bag sealing detection system provided by the present invention;

[0030] Figure 5 It is a cross-sectional view of a grabbing component in a food packaging bag sealing detection system provided by the present invention;

[0031] Figure 6 It is a structural schematic diagram between a grabbing component and a pressing component in a food packaging bag sealing detection system provided by the present invention;

[0032] Figure 7 It is a structural schematic diagram of a detection component in a food packaging bag sealing detection system provided by the present invention;

[0033] Figure 8 It is a cross-sectional view of a detection cylinder in a food packaging bag sealing detection system provided by the present invention.

[0034] In the figure: 1. conveyor; 2. detection mechanism; 21. grabbing component; 211. transfer component; 2111. support frame; 2112. drive motor; 2113. swing arm; 212. suction cup component; 2121. sealing cover plate; 2122. cylinder; 2123. connecting plate; 2124. air pump; 2125. air pipe; 2126. suction cup; 2127. connecting spring; 2128. sliding sleeve; 2129. rotating rod; 21210 , support spring; 22, detection component; 221, detection cylinder; 222, vacuum pump; 223, air pressure detection component; 23, auxiliary pushing component; 231, pushing member; 2311, filter plate; 2312, sliding rod; 2313, reset spring; 2314, movable sleeve; 232, pressing member; 2321, extrusion rod; 2322, inclined block; 2323, driving rod; 2324, pressure spring; 3, food packaging bag; 4, recycling box. DETAILED DESCRIPTION

[0035] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples. Embodiment 1

[0036] Please refer to Figure 1 to Figure 2 A food packaging bag sealing detection system includes: a conveyor 1 and a detection mechanism 2, the detection mechanism 2 is used to randomly perform sealing detection on the food packaging bags 3 on the conveyor 1, the detection mechanism 2 includes a grasping component 21, a detection component 22 and an auxiliary pushing component 23, wherein the detection component 22 is located on one side of the grasping component 21, and is used to perform an underwater decompression sealing detection on the food packaging bag 3; the auxiliary pushing component 23 is arranged in the detection component 22, after the detection is completed, the auxiliary pushing component 23 contacts with the lower surface of the food packaging bag 3, and pushes the detected food packaging bag 3 to the entrance position of the detection component 22, so that the suction cup assembly 212 after switching to the grasping state can grasp the detected food packaging bag 3 and transfer it to the outside of the detection component 22.

[0037] For details, please refer to Figure 1 to Figure 2In order to realize the function of automatically grabbing the food packaging bag 3 and avoid excessive obstruction of the outer side of the food packaging bag 3 during the grabbing process, the present invention designs a grabbing component 21. The specific scheme is as follows: the grabbing component 21 includes a transfer component 211 and a suction cup component 212. The transfer component 211 is connected to the outer side of the conveyor 1. One end of the transfer component 211 is connected to the suction cup component 212, which is used to drive the suction cup component 212 to move between the conveyor 1 and the detection component 22. The suction cup component 212 uses a negative pressure adsorption grabbing method to grab the food packaging bag on the conveyor 1. 3 is transferred to the detection component 22. The suction cup assembly 212 has two use states: grabbing and pressing. The suction cup assembly 212 includes a sealing cover plate 2121 adapted to the opening of the detection component 22. When the suction cup assembly 212 transfers the food packaging bag 3 to the inside of the detection component 22, the sealing cover plate 2121 just seals the opening of the detection component 22, and the suction cup assembly 212 switches from the grabbing state to the pressing state. After releasing the adsorption effect on the food packaging bag 3, the food packaging bag 3 is simultaneously pressed downward into the detection component 22, so that the food packaging bag 3 is in a preset posture to be detected.

[0038] For further information, please refer to Figure 3 In order to realize the above-mentioned functions of the grabbing component 21, the present invention designs a specific structure of the grabbing component 21, and the specific scheme is: the transfer component 211 includes a support frame 2111, and the support frame 2111 is located in the middle position of the conveyor 1. The upper end of the support frame 2111 is rotatably installed with a driving motor 2112, and the driving motor 2112 can be a servo motor, and its operation is controlled by an external controller. The top surface of the support frame 2111 is rotatably installed with a swing arm 2113, and the driving end of the driving motor 2112 is fixed to the rotating end of the swing arm 2113, and the suction cup assembly 212 is connected to the end of the swing arm 2113 away from the driving motor 2112.

[0039] It should be noted that when the food packaging bag 3 is grabbed and transferred, the grabbing assembly is located directly above the conveyor 1, and suction is generated by the grabbing assembly to suck the upper surface of the food packaging bag 3 to complete the grabbing action. Afterwards, the driving motor 2112 is rotated to drive the swing arm 2113 and the grabbing assembly to swing horizontally on the top surface of the support frame 2111. When the swing arm 2113 rotates ninety degrees, the food packaging bag 3 is just above the detection component 22. At this time, the driving motor 2112 stops rotating, and the grabbing assembly moves downward to transfer the food packaging bag 3 to the detection component 22.

[0040] For details, please refer to Figures 3 to 6In order to realize the suction grabbing method for the food packaging bag 3, the present invention designs a specific structure of the suction cup assembly 212, and the specific scheme is: the suction cup assembly 212 includes a lifting member, a suction member and a pressing member, the fixed end of the lifting member is connected to the end of the swing arm 2113, and the telescopic end of the lifting member is connected to the pressing member, the suction member is connected to the pressing member, the lifting member is used to drive the suction member and the pressing member to move up and down together, and the suction member grabs the food packaging bag 3 through suction. After the suction member releases the grabbing effect on the food packaging bag 3, the pressing member generates a downward pressing force on the food packaging bag 3, so that the food packaging bag 3 is separated from the suction member and moves down to the detection position preset by the detection component 22.

[0041] The lifting member includes a cylinder 2122, a fixed end of the cylinder 2122 is fixed to the end of the swing arm 2113, a telescopic end of the cylinder 2122 is fixedly connected to a connecting plate 2123, and the connecting plate 2123 is fixed to one end of the pressing member. The suction member includes an air pump 2124, an air pipe 2125, a suction cup 2126 and a connecting spring 2127. The air pump 2124 is fixedly installed at the end of the swing arm 2113, the suction cup 2126 is located below the connecting plate 2123, the top of the air pipe 2125 is fixed to the connecting end of the air pump 2124, the bottom end of the air pipe 2125 is slidably connected to the suction cup 2126, and the bottom end of the air pipe 2125 extends downward from the top of the suction cup 2126 to the inside of the suction cup 2126, the connecting spring 2127 is sleeved on the outside of the air pipe 2125, and the two ends of the connecting spring 2127 are respectively fixed to the bottom surface of the swing arm 2113 and the top surface of the connecting plate 2123, and the air pipe 2125 is a flexible tube. The pressing part includes a sliding sleeve 2128 and six rotating rods 2129, and the number of the rotating rods 2129 is not limited to six and can be adjusted according to actual usage requirements; the sliding sleeve 2128 is slidingly sleeved on the outer side of the air pipe 2125, and its outer side is slidably connected to the suction cup 2126, the top of the sliding sleeve 2128 is fixed to the bottom surface of the connecting plate 2123, and its bottom end extends downward into the suction cup 2126, and the six rotating rods 2129 are evenly distributed around the circumference of the suction cup 2126, and their top ends are hinged to the bottom end of the sliding sleeve 2128, and their bottom ends are fitted with the inner wall of the suction cup 2126, and support springs 21210 are fixedly installed between the six rotating rods 2129 and the sliding sleeve 2128.

[0042] It should be noted that the use process of the suction cup assembly 212 is as follows: when the food packaging bag 3 is grabbed from the conveyor 1, the suction cup assembly 212 is located above the conveyor 1, and the cylinder 2122 extends downward, which can drive the connecting plate 2123 to move downward, and the sliding sleeve 2128, the suction cup 2126 and the sealing cover plate 2121 move downward together, and the air pipe 2125 and the connecting spring 2127 are stretched at the same time. After the bottom of the suction cup 2126 contacts the upper surface of the food packaging bag 3 below, the cylinder 2122 stops extending, and the air pump 2124 is started to make the suction cup 2126 generate suction, thereby sucking the food packaging bag 3. Afterwards, the cylinder 2122 contracts, which can drive the suction cup 2126 and the food packaging bag 3 to move upward together, so that the food packaging The bag 3 is separated from the conveyor 1, and then the transfer component 211 is moved to move the suction cup component 212 and the food packaging bag 3 together to the top of the detection component 22, and then the cylinder 2122 is extended downward again to drive the food packaging bag 3 to move down and enter the entrance of the detection component 22. At the same time, the sealing cover plate 2121 moves downward with the suction cup 2126 and gradually approaches the opening of the detection component 22. When the sealing cover plate 2121 and the top opening of the detection component 22 are closed, the inside of the detection component 22 is in a sealed state, the vacuum pump 2124 stops running, and the suction cup 2126 loses its suction effect, releasing the gripping effect on the food packaging bag 3. At this time, since the detection component 22 is filled with pure water, the food packaging bag 3 floats on the water surface and has not yet been When the cylinder 2122 is in the preset position to be detected, the sleeve 2128 can be driven to move downward by controlling the air cylinder 2122 to continue to extend downward. However, since the suction cup 2126 is restricted by the sealing cover plate 2121, it cannot continue to move downward with the connecting plate 2123 and the sleeve 2128. The air pipe 2125 and the connecting spring 2127 are no longer stretched. The sleeve 2128 continues to move downward, which can drive the rotating rod 2129 connected thereto to move downward. When the rotating rod 2129 shrinks inside the suction cup 2126, the supporting spring 21210 is in a compressed state. As the rotating rod 2129 moves downward and gradually moves away from the suction cup 2126, the rotating rod 2129 is driven to expand outward at the same time under the elastic force of the supporting spring 21210. After the rotating rod 2129 moves downward, the bottom end begins to move downward. The six rotating rods 2129 are in a fully expanded state. The expanded six rotating rods 2129 form a pressing structure, which always generates pressing force on the food packaging bag 3, completing the switching action of the suction cup assembly 212 from the grasping state to the pressing state. After that, the detection component 22 can be started to detect the sealing of the food packaging bag 3. After the detection is completed, the cylinder 2122 is contracted to first move the rotating rod 2129 upward and shrink it into the suction cup 2126.The suction cup assembly 212 is switched to the grasping state, and the food packaging bag 3, under the buoyancy of the pure water, synchronously follows the rotating rod 2129 to move upward, and finally the upper surface of the food packaging bag 3 contacts the bottom of the suction cup 2126, and then the air pump 2124 is started to grasp the food packaging bag 3 by suction again, and it is taken out of the detection component 22, and the detection operation is completed.

[0043] It can be seen that the suction cup assembly 212 provided in the present invention is different from the traditional clamping structure. It adopts suction to grab the food packaging bag 3, wherein the provided pressing member has two functions. First, when the suction cup 2126 is separated from the food packaging bag 3, the pressing member generates downward pressure on the food packaging bag 3, which can promote the automatic separation of the food packaging bag 3 and the suction cup 2126, and avoid the problem that the food packaging bag 3 and the suction cup 2126 are difficult to separate due to the air pressure of the suction cup 2126; second, the pressing assembly can continue to generate downward pressure on the food packaging bag 3 during the downward movement, pressing the food packaging bag 3 to immerse it in water; in addition, as far as the pressing member itself is concerned, only the bottom end of the rotating rod 2129 is in contact with the upper surface of the food packaging bag 3, and the contact area between the two is small, which is not easy to block the outer side of the food packaging bag 3, so the impact on the detection result is small, and the six rotating rods 2129 are synchronously unfolded, which can be in uniform contact with the upper surface of the food packaging bag 3, ensuring that a uniform pressing force is generated on the food packaging bag 3, so that it can be smoothly immersed in water.

[0044] Please refer to Figures 7 and 8 In the above scheme, if the food packaging bag 3 to be detected has a large opening, or is broken during the detection process, at this time, the water inside the detection component 22 will enter the food packaging bag 3, causing the food packaging bag 3 to sink to the bottom of the detection component 22, and the above-mentioned grabbing component 21 will not be able to take out the food packaging bag 3. Therefore, in order to solve the above problem, the present invention continues to optimize the above scheme, specifically: the auxiliary pushing component 23 includes a pushing member 231 and a pressing member 232, and the pushing member 231 is slidably arranged on the detection component 22, the pushing member 231 has an elastic telescopic function. When the pushing member 231 is in a naturally extended state, its movable end is located at the entrance of the detection component 22, and the pressing member 232 is connected to the sliding sleeve 2128. When the sealing cover plate 2121 moves down and the opening of the detection component 22 is closed, the pressing member 232 first squeezes the pushing member 231. When the grasping component 21 switches from the grasping state to the pressing state, the pressing member 232 is driven to squeeze the pushing member 231 again, so that the bottom surface of the food packaging bag 3 is separated from the pushing member 231.

[0045] The pushing member 231 includes a filter plate 2311 and two sliding rods 2312. The filter plate 2311 is located in the detection component 22. The outer side of the filter plate 2311 does not contact the inner side of the detection component 22. The filter plate 2311 is provided with filter holes. The two sliding rods 2312 are symmetrically fixedly installed in the detection component 22. The two ends of the filter plate 2311 are respectively slidably connected to the outer sides of the two sliding rods 2312. The lower ends of the outer sides of the two sliding rods 2312 are both sleeved with return springs 2313, and the two ends of the return springs 2313 are respectively fixed to the filter plate 2311 and the sliding rod 2312. A movable sleeve 2314 is slidably installed on the upper end of the sliding rod 2312, and the bottom end of the movable sleeve 2314 is fixed to the top surface of the filter plate 2311. The pressing member 232 includes two extrusion rods 2321, two inclined blocks 2322 and two driving rods 2323. The two extrusion rods 2321 are symmetrically slidably installed inside the sealing cover plate 2121, one end of which extends downward to the bottom of the sealing cover plate 2121, and the other end extends into the suction cup 2126. The two driving rods 2323 are symmetrically hingedly installed at the lower end of the sliding sleeve 2128, and the ends of the two driving rods 2323 away from the sliding sleeve 2128 are hinged to the ends of the two extrusion rods 2321 accordingly. A pressure spring 2324 is fixedly installed between the extrusion rods 2321 and the sealing cover plate 2121. The ends of the two extrusion rods 2321 located at the bottom of the sealing cover plate 2121 are both provided with inclined surfaces with the inclined surface blocks 2322, and the two inclined surface blocks 2322 are correspondingly fixedly installed at the top ends of the two movable sleeves 2314, and the two inclined surface blocks 2322 are aligned up and down with the two inclined surfaces.

[0046] It should be noted that the use process of the auxiliary pushing component 23 is as follows: when the grabbing component 21 places the food packaging bag 3 at the entrance position of the detecting component 22, the sealing cover plate 2121 gradually moves down close to the top opening of the detecting component 22, and the squeezing rod 2321 moves down synchronously with the sealing cover plate 2121 and gradually approaches the inclined surface block 2322 below. After the inclined surface at the end of the squeezing rod 2321 contacts the inclined surface block 2322, as the sealing cover plate 2121 continues to move down, the squeezing rod 2321 generates downward pressure on the inclined surface block 2322, so that the movable sleeve 2314 and the filter plate 2311 move slowly downward along the sliding rod 2312. , and the return spring 2313 is squeezed by the filter plate 2311 and shrinks synchronously. After the sealing cover plate 2121 and the top opening of the detection component 22 are closed, the lower surface of the food packaging bag 3 contacts the upper surface of the filter plate 2311. Then, the sliding sleeve 2128 moves downward to drive the rotating rod 2129 to move and expand, generating downward pressure on the food packaging bag 3, and the driving rod 2323 moves with the sliding sleeve 2128, and drives the squeezing rod 2321 to translate and shrink toward the inside of the sealing cover plate 2121, and the pressure spring 2324 is squeezed and shrunk by the squeezing rod 2321. Through the translational movement of the squeezing rod 2321, the inclined surface of the inclined surface block 2322 generates a downward movement. The squeezing force drives the movable sleeve 2314 and the filter plate 2311 to move further downward. Since the squeezing rod 2321 generates squeezing force on the inclined block 2322 before the bottom end of the rotating rod 2129 contacts the food packaging bag 3, the filter plate 2311 is separated from the bottom of the food packaging bag 3 first. Then, when the rotating rod 2129 presses the food packaging bag 3, there is always a gap between the lower surface of the food packaging bag 3 and the filter plate 2311. This can prevent the filter plate 2311 from blocking the lower surface of the food packaging bag 3. After the food packaging bag 3 is completely immersed in water, the filter plate 2311 no longer moves downward and is located below the food packaging bag 3. During the end of the detection, If the food packaging bag 3 is damaged, water will enter the inner part and start to sink, and will directly fall on the top surface of the filter plate 2311. Then, when the rotating rod 2129 contracts, under the elastic force of the reset spring 2313, the filter plate 2311 will first drive the food packaging bag 3 to move upward, so that it will float out of the water. After the rotating rod 2129 is completely contracted, the upper surface of the food packaging bag 3 can just contact the bottom of the suction cup 2126 again. At this time, the suction pump 2124 is operated to make the suction cup 2126 suck the upper surface of the food packaging bag 3. After that, the inspected food packaging bag 3 can be taken out from the detection component 22, and then the next food packaging bag 3 can be inspected.

[0047] It can be seen that the present invention further provides an auxiliary pushing component 23, which can be used in conjunction with the grasping component 21. Under the premise of not blocking the food packaging bag 3, the sinking food packaging bag 3 can be intercepted, and the intercepted food packaging bag 3 can be floated to the surface of the water and contacted with the grasping component 21, so as to solve the problem that the damaged food packaging bag 3 sinks and is difficult to take out; wherein, by providing a filter plate 2311, on the one hand, in the process of the pressing member pressing the food packaging bag 3 into the water, the top surface of the filter plate 2311 contacts the food packaging bag 3, which can provide support for the bottom surface of the food packaging bag 3, so as to reduce the interference of the buoyancy in the water on the food packaging bag 3, so that the food packaging bag 3 can be steadily immersed in the water without position displacement; on the other hand, as an intercepting structure, the sinking food packaging bag 3 is intercepted, and at the same time, the filter plate 2311 moves upward, which can drive the food packaging bag 3 to float to the surface of the water and contact with the grasping component 21, so that the grasping component 21 can grasp the food packaging bag 3 again.

[0048] Please refer to Figure 7 In order to realize the differential pressure detection of food packaging bag 3 in water, the present invention designs a specific structure of the detection component 22, and the specific scheme is as follows: the detection component 22 includes a detection cylinder 221, a vacuum pump 222 and an air pressure detection component 223. The detection cylinder 221 and the vacuum pump 222 are fixedly installed on one side of the support frame 2111. The connecting end of the vacuum pump 222 is connected to the detection cylinder 221 through a pipeline. The air pressure detection component 223 is installed inside the detection cylinder 221, which is used to detect the air pressure change inside the detection cylinder 221. In addition, a recycling box 4 can be installed on one side of the conveyor 1 to recycle unqualified food packaging bags 3, and qualified food packaging bags 3 can be directly put back on the conveyor 1.

[0049] It should be noted that when the above-mentioned detection component 22 is in use, the sealing cover 2121 has been closed with the top of the detection cylinder 221, so that the interior of the detection cylinder 221 is in a sealed state, and then the vacuum pump 222 is started to extract the air inside the detection cylinder 221, so that the internal air pressure of the detection cylinder 221 changes. If the sealing of the food packaging bag 3 is good, the internal air pressure of the detection cylinder 221 will not change for a period of time after it stabilizes. If the sealing is not good, the air pressure will change further. At the same time, it is also possible to observe whether bubbles are generated in the water to determine whether the sealing of the food packaging bag 3 is good. Embodiment 2

[0050] A method for detecting the sealing of a food packaging bag 3 is applicable to the above-mentioned food packaging bag 3 sealing detection system, and comprises the following operating steps:

[0051] S1, randomly grab a food packaging bag 3 from the conveyor 1 through the grabbing component 21, and transfer it to the detection component 22;

[0052] S2. After the food packaging bag 3 enters the detection component 22, the gripping component 21 drives the sealing cover plate 2121 to seal the top opening of the detection component 22. Then, the gripping component 21 switches from the gripping state to the pressing state, and simultaneously pushes the food packaging bag 3 to a preset posture to be detected, and performs vacuum detection through the detection component 22.

[0053] S3, after the detection is completed, when the grabbing component 21 switches from the pressing state to the grabbing state, the auxiliary pushing component 23 generates an upward thrust on the bottom surface of the food packaging bag 3 after the detection, and pushes the food packaging bag 3 to the entrance of the detection component 22, and the grabbing component 21 grabs the food packaging bag 3 after the detection and transfers it to the outside of the detection component 22;

[0054] S4. If the detection result of the food packaging bag 3 is qualified, the food packaging bag 3 is transferred to the conveyor 1 through the grabbing component 21; if the detection result is unqualified, the food packaging bag 3 is transferred to a recycling place.

[0055] An example of the present specific implementation mode is described above, but the present embodiment is not limited to the above-mentioned specific implementation mode, which is merely illustrative and not restrictive. A person skilled in the art may make many forms inspired by the present embodiment, all of which are protected by the present embodiment.

Claims

1. A food packaging bag sealing detection system, comprising: A conveyor (1) and a detection mechanism (2), wherein the detection mechanism (2) is used to randomly perform a sealing test on food packaging bags (3) on the conveyor (1), and is characterized in that the detection mechanism (2) comprises a grabbing component (21), a detection component (22) and an auxiliary pushing component (23); The grasping component (21) comprises a transfer component (211) and a suction cup component (212); the transfer component (211) is connected to the outside of the conveyor (1); one end of the transfer component (211) is connected to the suction cup component (212) and is used to drive the suction cup component (212) to perform a displacement action between the conveyor (1) and the detection component (22); the suction cup component (212) adopts a negative pressure adsorption grasping method to transfer the food packaging bag (3) on the conveyor (1) to the detection component (22); the suction cup component (212) has two uses: grasping and pressing. state, the suction cup assembly (212) comprising a sealing cover plate (2121) adapted to the opening of the detection component (22), and when the suction cup assembly (212) transfers the food packaging bag (3) into the interior of the detection component (22), the sealing cover plate (2121) just seals the opening of the detection component (22), and the suction cup assembly (212) switches from a grasping state to a pressing state, and after releasing the adsorption effect on the food packaging bag (3), simultaneously presses the food packaging bag (3) downward into the detection component (22), so that the food packaging bag (3) is in a preset posture to be detected; The detection component (22) is located on one side of the grasping component (21), and is used to perform a water pressure reduction type sealing test on the food packaging bag (3); The auxiliary pushing component (23) is arranged in the detection component (22). After the detection is completed, the auxiliary pushing component (23) contacts the lower surface of the food packaging bag (3) to push the detected food packaging bag (3) to the entrance position of the detection component (22), so that the suction cup assembly (212) switched to the grasping state can grasp the detected food packaging bag (3) and transfer it to the outside of the detection component (22).

2. A food packaging bag sealing detection system according to claim 1, characterized in that: The transfer assembly (211) comprises a support frame (2111), the support frame (2111) is located in the middle of the conveyor (1), a drive motor (2112) is rotatably mounted on the upper end of the support frame (2111), a swing arm (2113) is rotatably mounted on the top surface of the support frame (2111), a drive end of the drive motor (2112) is fixed to a rotation end of the swing arm (2113), and the suction cup assembly (212) is connected to an end of the swing arm (2113) away from the drive motor (2112).

3. A food packaging bag sealing detection system according to claim 2, characterized in that: The suction cup assembly (212) comprises a lifting member, a suction member and a pressing member, the fixed end of the lifting member is connected to the end of the swing arm (2113), and the telescopic end of the lifting member is connected to the pressing member, the suction member is connected to the pressing member, the lifting member is used to drive the suction member and the pressing member to move up and down together, the suction member grabs the food packaging bag (3) through suction, and after the suction member releases the grabbing effect on the food packaging bag (3), the pressing member generates a downward pressing force on the food packaging bag (3), so that the food packaging bag (3) is separated from the suction member and moves downward to a detection position preset by the detection component (22).

4. A food packaging bag sealing detection system according to claim 3, characterized in that: The lifting member comprises a cylinder (2122), the fixed end of the cylinder (2122) is fixed to the end of the swing arm (2113), the telescopic end of the cylinder (2122) is fixedly connected to a connecting plate (2123), and the connecting plate (2123) is fixed to one end of the pressing member; The suction member comprises an air pump (2124), an air pipe (2125), a suction cup (2126) and a connecting spring (2127); the air pump (2124) is fixedly mounted on the end of the swing arm (2113); the suction cup (2126) is located below the connecting plate (2123); the top end of the air pipe (2125) is fixed to the connecting end of the air pump (2124); the bottom end of the air pipe (2125) is slidably connected to the suction cup (2126); and the bottom end of the air pipe (2125) extends downward from the top of the suction cup (2126) to the inside of the suction cup (2126); the connecting spring (2127) is sleeved on the outside of the air pipe (2125); and the two ends of the connecting spring (2127) are respectively fixed to the bottom surface of the swing arm (2113) and the top surface of the connecting plate (2123); and the air pipe (2125) is a flexible tube.

5. A food packaging bag sealing detection system according to claim 4, characterized in that: The pressing member comprises a sliding sleeve (2128) and a plurality of rotating rods (2129); the sliding sleeve (2128) is slidingly arranged on the outer side of the trachea (2125); the outer side of the sliding sleeve is slidingly connected to the suction cup (2126); the top end of the sliding sleeve (2128) is fixed to the bottom surface of the connecting plate (2123); the bottom end of the sliding sleeve extends downward into the suction cup (2126); a plurality of rotating rods (2129) are evenly distributed around the circumference of the suction cup (2126); the top ends of the rotating rods (2129) are hinged to the bottom end of the sliding sleeve (2128); the bottom ends of the rotating rods (2129) are fitted to the inner wall of the suction cup (2126); and a supporting spring (21210) is fixedly installed between the plurality of rotating rods (2129) and the sliding sleeve (2128).

6. A food packaging bag sealing detection system according to claim 5, characterized in that: The auxiliary pushing component (23) comprises a pushing component (231) and a pressing component (232); the pushing component (231) is slidably arranged in the detection component (22); the pushing component (231) has an elastic telescopic function; when the pushing component (231) is in a naturally extended state, its movable end is located at the entrance position of the detection component (22); the pressing component (232) is connected to the sliding sleeve (2128); when the sealing cover plate (2121) moves downward and closes the opening of the detection component (22), the pressing component (232) first presses the pushing component (231); when the grasping component (21) switches from the grasping state to the pressing state, the pressing component (232) is driven to press the pushing component (231) again, so that the bottom surface of the food packaging bag (3) is separated from the pushing component (231).

7. A food packaging bag sealing detection system according to claim 6, characterized in that: The pushing member (231) comprises a filter plate (2311) and two sliding rods (2312); the filter plate (2311) is located in the detection component (22); the two sliding rods (2312) are symmetrically fixedly installed in the detection component (22); the two ends of the filter plate (2311) are respectively slidably connected to the outer sides of the two sliding rods (2312); the lower ends of the outer sides of the two sliding rods (2312) are sleeved with a return spring (2313); the two ends of the return spring (2313) are respectively fixed to the filter plate (2311) and the sliding rod (2312); the upper end of the sliding rod (2312) is slidably installed with a movable sleeve (2314); the bottom end of the movable sleeve (2314) is fixed to the top surface of the filter plate (2311).

8. A food packaging bag sealing detection system according to claim 7, characterized in that: The pressing member (232) comprises two extrusion rods (2321), two inclined blocks (2322) and two driving rods (2323). The two extrusion rods (2321) are symmetrically slidably mounted inside the sealing cover plate (2121), one end of which extends downward to the bottom of the sealing cover plate (2121), and the other end of which extends into the suction cup (2126). The two driving rods (2323) are symmetrically hingedly mounted on the lower end of the sliding sleeve (2128), and the two driving rods (2323) are away from the sliding sleeve (2128). ) is hinged to the ends of the two extrusion rods (2321), a pressure spring (2324) is fixedly installed between the extrusion rod (2321) and the sealing cover plate (2121), and one end of the two extrusion rods (2321) located at the bottom of the sealing cover plate (2121) is provided with an inclined surface adapted to the inclined surface block (2322), and the two inclined surface blocks (2322) are fixedly installed on the top ends of the two movable sleeves (2314), and the two inclined surface blocks (2322) are aligned with the two inclined surfaces in the upper and lower directions.

9. A food packaging bag sealing detection system according to claim 8, characterized in that: The detection component (22) comprises a detection cylinder (221), a vacuum pump (222) and an air pressure detection component (223); the detection cylinder (221) and the vacuum pump (222) are both fixedly mounted on one side of a support frame (2111); a connection end of the vacuum pump (222) is connected to the detection cylinder (221) via a pipeline; and the air pressure detection component (223) is mounted inside the detection cylinder (221) and is used to detect changes in air pressure inside the detection cylinder (221).

10. A method for detecting the sealing of a food packaging bag, applied to the food packaging bag sealing detection system according to any one of claims 1 to 9, characterized in that: The steps include: S1, randomly grabbing a food packaging bag (3) from the conveyor (1) by a grabbing component (21), and transferring it to a detection component (22); S2, after the food packaging bag (3) enters the detection component (22), the gripping component (21) drives the sealing cover plate (2121) to seal the top opening of the detection component (22), and then the gripping component (21) switches from a gripping state to a pressing state, and simultaneously pushes the food packaging bag (3) to a preset posture to be detected, and performs a vacuum test through the detection component (22); S3, after the detection is completed, when the grasping component (21) switches from the pressing state to the grasping state, the auxiliary pushing component (23) generates an upward thrust on the bottom surface of the food packaging bag (3) after the detection, so as to push the food packaging bag (3) to the entrance of the detection component (22), and the grasping component (21) grasps the food packaging bag (3) after the detection and transfers it to the outside of the detection component (22); S4. If the test result of the food packaging bag (3) is qualified, the food packaging bag (3) is transferred to the conveyor (1) through the grabbing component (21); if the test result is unqualified, the food packaging bag (3) is transferred to a recycling place.

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