A visual detection device based on scented tea packaging production

Abstract

The present application relates to a kind of visual detection device based on scented tea packaging production, it is related to scented tea production visual detection technical field, the present application includes packer, packer top is equipped with feed hopper, inside is equipped with with feed hopper's discharge nozzle, discharge nozzle middle segment is fixedly installed with installation box, installation box is divided into detection cavity and cyclone cavity by a protection window, bridge detection camera is arranged in detection cavity, by setting bridge detection camera and cyclone mechanism, when there is no bridge, plug keeps full open, air bag forms helical flow in cyclone cavity by suction air, and every batch of scented tea is normally separated and sorted, and every batch of scented tea passes through installation box, and first spiral hopper is blocked, so that helical flow strengthens effect is applied to lower discharge nozzle, and when secondary bridge appears, upstream external discharge pump is in closed state, downstream secondary bridge is blocked, air bag suction process causes airflow disturbance and air pressure fluctuation, and it is applied to the material of secondary bridge, and realize softness full tour arch.

Description

Technical Field

[0001] This invention relates to the field of visual inspection technology in flower tea production, and specifically to a visual inspection device based on flower tea packaging production. Background Technology

[0002] The raw materials for scented tea have a naturally irregular shape, making them prone to bridging during the unloading process of bag-type packaging machines. Bridging occurs when materials hook and get stuck in the hopper or discharge channel, forming arched spaces that hinder or completely block the flow of material. To address this bridging issue during the feeding of scented tea into the packaging bags, current technologies typically employ forced bridging devices such as air hammers, vibrators, or agitators installed on the side walls of the hopper. These devices use continuous, periodic vibration or agitation to forcibly break the bridging structure and restore the flow of material.

[0003] However, for flower tea with whole and large blossoms as quality standards, the existing forced arch breaking device will cause the flower tea to break. In addition, dried flower tea usually has a lot of tea hairs. During the packaging process, the tea hairs stick to the sealing opening of the packaging bag, causing the seal to fail. The existing arch breaking device and bridging detection camera are usually located in the middle of the feeding cylinder. Multiple bridging may occur during the material discharge process. Frequent vibration arch breaking will cause the camera to be in a state of vibration for a long time, reducing the detection effect and service life. The arch breaking method of the stirring paddle cannot take into account the rear discharge cylinder.

[0004] To address the aforementioned technical deficiencies, a solution is proposed. Summary of the Invention

[0005] This invention provides a visual inspection device for the production of flower tea packaging, which solves the problem that both the visual inspection camera and the flower tea material are easily damaged during the arch breaking process.

[0006] To ensure the integrity of the finished flower tea packaging and the stability of the inspection process, the present invention is achieved through the following technical solution: a visual inspection device based on flower tea packaging production, including a packaging machine, wherein the packaging machine is provided with a feeding hopper at the top and a discharging nozzle communicating with the feeding hopper inside, and an installation box is fixedly installed in the middle of the discharging nozzle, the installation box is divided into an inspection chamber and a cyclone chamber by a protective window, and a bridging inspection camera is installed in the inspection chamber; The top and bottom walls of the installation box are respectively provided with an upper material inlet and a lower material inlet arranged coaxially. A first conical hopper is fixed inside the upper material inlet and a second conical hopper is fixed inside the lower material inlet. Both the first and second conical hoppers are shaped with their larger openings facing upwards and their smaller openings facing downwards. A mesh cylinder is fixedly installed between the larger openings of the first and second conical hoppers. The cyclone cavity is equipped with a swirling mechanism, which includes a drive unit and a connecting plate. The connecting plate is connected to the drive unit and can move up and down within the cyclone cavity. An airbag is fixedly connected to the bottom of the connecting plate, and the bottom of the airbag is fixedly connected to the mounting box, so that the airbag is squeezed when the connecting plate moves downward and stretched when it moves upward. An air nozzle is fixedly installed and connected to the lower part of the outer wall of the airbag, and its air outlet direction is set along the tangential direction of the cyclone cavity, so as to form a spiral airflow within the cyclone cavity when the airbag is squeezed or stretched. The connecting plate is connected to a fixed column via a spiral connection assembly. Both ends of the fixed column are fixedly connected to plugs, which are respectively positioned opposite to the small openings of the first and second conical hoppers. It also includes a control unit, which is electrically connected to the bridging detection camera and the drive unit respectively; The control unit drives the connecting plate to switch between the intermediate material feeding position, the lower sealing and arch breaking position, and the upper sealing and anti-blocking position based on the detection signal from the bridging detection camera.

[0007] Furthermore, a shock-absorbing bracket is fixedly installed on the inner wall of the mounting box within the detection cavity, and the bridging detection camera is fixedly installed on the shock-absorbing bracket.

[0008] Furthermore, the volume of the airbag is configured such that the amount of gas discharged by a single complete compression is not less than one-half of the free space volume inside the mounting box; The shape of the outer wall of the airbag near the mesh cylinder is adapted to the outer surface of the mesh cylinder, and the shape of the protective window near the mesh cylinder is adapted to the outer surface of the mesh cylinder, forming an annular gap to make the spiral airflow more stable.

[0009] Furthermore, the drive unit includes a motor, which is fixedly mounted on the top of the mounting box. A lead screw is fixedly mounted on the output end of the motor. The lead screw is vertically rotatably connected to the inner wall of the mounting box. A slide rod is vertically fixedly connected to the inner wall of the mounting box. A slider is provided on both the slide rod and the lead screw. One slider is threadedly connected to the lead screw, and the other slider is sleeved and slidably connected to the slide rod. The outer walls of the connecting plate are fixedly connected between the two sliders.

[0010] Furthermore, the spiral connection assembly includes a spiral plate and a mounting block. Both ends of the mounting block are fixedly connected to two sliders through the spiral plate, and the fixing post is vertically inserted and fixedly connected to the mounting block.

[0011] Furthermore, the mesh tube has two long grooves for threading a spiral plate, which slides up and down within the grooves.

[0012] Furthermore, spiral grooves are provided on the outer wall of the first conical bucket and the inner wall of the second conical bucket, and a spiral guide plate is fixedly connected to the outer wall of the mesh cylinder. The spiral direction of the spiral grooves, spiral guide plates and spiral plates is consistent with the spiral rise angle, so as to form a continuous spiral airflow path in the cyclone cavity.

[0013] Furthermore, the bottom of the mounting box is detachably connected to and connected to a collection trough. There are two collection troughs, which are symmetrically distributed along the feeding path. The two collection troughs are detachably connected to the outer wall of the discharge nozzle. The bottom periphery of the mesh cylinder of the collection trough is surrounded by a one-way plate fixedly connected to the inner wall of the collection trough. The one-way plate is inclined toward the bottom wall of the collection trough, and a gap is opened between the end of the one-way plate near the bottom wall of the collection trough and the collection trough. The gap is used to allow debris and tea hairs to pass through. A sealing layer is fixedly connected between the two collection tanks, and mounting plates are fixedly connected to both sides of the collection tanks.

[0014] The present invention has the following beneficial effects: (1) The visual inspection device based on the production of flower tea packaging works continuously during the feeding process through the bridging detection camera and the cyclone mechanism: when there is no bridging, the plug is kept fully open, and the airbag forms a spiral airflow in the cyclone chamber during the suction process and the air is sprayed to perform normal cyclone sorting and decrushing of each batch of flower tea. When each batch of flower tea passes through the installation box, the first spiral bucket is blocked, so that the cyclone strengthens the effect on the lower discharge nozzle. When secondary bridging occurs, the upstream external discharge pump is closed, the downstream secondary bridging is blocked, and the airbag suction process causes airflow disturbance and air pressure fluctuation, which acts on the material of secondary bridging to achieve gentle full-flow arch breaking. When bridging is detected, the second spiral bucket is blocked. At this time, the airbag switches to the squeezing and spraying mode, which concentrates the effect on the upper discharge nozzle to break the arch, which not only ensures the cleanliness of the daily fragments, but also deals with the bridging situation.

[0015] (2) The visual inspection device based on the production of flower tea packaging separates the installation box into an independent inspection chamber and a cyclone chamber through a protective window. The protective window also works with the shape of the airbag to form an annular gap, which is conducive to the formation of a stable cyclone. It protects the bridging inspection camera and adapts to the airflow direction, so that the airflow acts on the cleaning protective window at the same time, ensuring the stability of visual inspection.

[0016] 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

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the packaging machine of the present invention, which is equipped with a feeding hopper; Figure 3This is a schematic diagram of the structure of the present invention, in which the collection trough surrounds and is detachably connected to the outer wall of the discharge nozzle; Figure 4 This is a schematic diagram of the structure in which a motor is fixedly mounted on the top of the mounting box of the present invention. Figure 5 A schematic diagram of the structure of the mounting box of the present invention having a bridging detection camera installed on the inner wall of the box. Figure 6 This is a schematic diagram of the structure of the conical bucket in contact with the plug of the present invention; Figure 7 This is a schematic diagram of the structure of the mounting box of the present invention, which has a detachable connection and a collection trough at the bottom; Figure 8 for Figure 6 Enlarged structural diagram at point A; Figure 9 This is a schematic diagram of the structure of the present invention, in which both ends of the mounting block are fixedly connected to the two sliders by spiral plates. Figure 10 This is a schematic diagram of the structure of the mesh cylinder of the present invention with an elongated groove; Figure 11 This is a schematic diagram of the structure of the conical bucket of the present invention, in which spiral grooves are formed on both the inner and outer walls.

[0018] In the diagram: 1. Packaging machine; 2. Feed hopper; 3. Mounting box; 4. Discharge nozzle; 5. Collection trough; 6. Mounting plate; 7. Shock absorber bracket; 8. Bridging detection camera; 9. Protective window; 10. Mesh cylinder; 11. Long trough; 12. Spiral plate; 13. Slider; 14. Sliding rod; 15. Mounting block; 16. Fixed column; 17. Plug; 18. Motor; 19. Lead screw; 20. Connecting plate; 21. Airbag; 22. Air nozzle; 23. Sealing layer; 24. One-way plate; 25. Spiral guide plate; 26a. First conical hopper; 26b. Second conical hopper; 27. Spiral trough. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] 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.

[0021] Please see Figures 1-11The present invention provides a technical solution: a visual inspection device based on the production of flower tea packaging, including a packaging machine 1, a feeding hopper 2 on the top of the packaging machine 1 for feeding the flower tea material to be packaged, a vertical discharge nozzle 4 inside the packaging machine 1, the discharge nozzle 4 being connected to the feeding hopper 2, and an installation box 3 being fixedly installed in the middle section of the discharge nozzle 4.

[0022] Packaging machine 1 is a bag-type packaging machine. Its specific structure and working principle are existing technologies. Above the feed hopper 2, there is an external discharge structure such as a metering pump in the discharge device of the flower tea production line, which is closed and connected to the feed hopper 2. When the external discharge device is not discharging, the upstream of the mounting box 3 is closed.

[0023] The interior of the mounting box 3 is divided into two independent spaces by a protective window 9: one side is the detection chamber and the other side is the cyclone chamber. The protective window 9 is made of transparent material, which achieves both physical isolation and ensures that light can pass through.

[0024] A shock-absorbing bracket 7 is fixedly installed on the inner wall of the detection chamber. A bridging detection camera 8 is fixedly installed on the shock-absorbing bracket 7. The bridging detection camera 8 is an intelligent camera with integrated image processing algorithms. Its lens is aimed at the material channel through the protective window 9 to monitor the material accumulation status in real time. When it is detected that no material appears within the discharge time, it is determined that bridging has occurred and outputs a trigger signal to the control unit.

[0025] The visual inspection device also includes a control unit, which is electrically connected to the bridging inspection camera 8 and the drive unit respectively. The control unit drives the connecting plate 20 to switch between the intermediate material feeding position, the lower sealing and arch breaking position and the upper sealing and anti-blocking position according to the detection signal of the bridging inspection camera 8.

[0026] The material is fed through the middle section where both plugs 17 are disengaged from the corresponding conical hopper openings, allowing the material to fall normally. The lower sealing and arch-breaking position is where the lower plug 17 blocks the opening of the second conical hopper 26b, and the airbag 21 compresses to form an upward backflow vortex. The upper sealing and anti-blocking position is where the upper plug 17 blocks the opening of the first conical hopper 26a, and the airflow is concentrated on the lower discharge nozzle.

[0027] The top and bottom walls of the mounting box 3 are respectively provided with an upper material inlet and a lower material inlet arranged coaxially. A first conical hopper 26a is fixed inside the upper material inlet, with its larger opening facing upward and its smaller opening facing downward. It receives the material from the upper discharge nozzle and guides it into the mounting box 3. A second conical hopper 26b is fixed inside the lower material inlet, with its larger opening facing upward and its smaller opening facing downward. It is used to guide the material from the mounting box 3 to the lower discharge nozzle 4. A mesh cylinder 10 is fixedly installed between the larger openings of the first conical hopper 26a and the second conical hopper 26b. The mesh size of the mesh cylinder 10 is smaller than that of whole flower tea but larger than that of broken flower tea and tea hairs, allowing broken tea to pass through while retaining whole flower tea inside the cylinder.

[0028] The cyclone chamber is equipped with a swirling mechanism. The drive unit includes a motor 18, which is fixedly installed on the top of the mounting box 3. A lead screw 19 is fixedly installed at the output end of the motor 18. The lead screw 19 is vertically rotatably connected to the inner wall of the mounting box 3. A slide rod 14 is also vertically fixedly connected to the inner wall of the mounting box 3. A slider 13 is threadedly connected to the lead screw 19. Another slider 13 is slidably sleeved on the slide rod 14. The outer walls of the connecting plate 20 are fixedly connected to the two sliders 13 on both sides. When the motor 18 drives the lead screw 19 to rotate, the connecting plate 20 moves up and down vertically.

[0029] A sealed bearing is fixed at the position where the output end of motor 18 passes through the top of mounting box 3, ensuring that air can flow through only the upper and lower material inlets of mounting box 3.

[0030] An airbag 21 is fixedly connected to the bottom of the connecting plate 20. The airbag 21 is a corrugated tube-shaped elastic airbag with an accordion-style folding structure. Its bottom is fixedly connected to the mounting box 3. When the connecting plate 20 moves downward, the airbag 21 is axially compressed and the internal gas is squeezed out. When the connecting plate 20 moves upward, the airbag 21 is axially stretched and gas is drawn in from the outside. The volume of the airbag 21 is configured such that the amount of gas discharged by a single complete compression is not less than half of the free space volume inside the mounting box 3 to ensure sufficient swirling intensity.

[0031] An air nozzle 22 is fixedly installed and connected to the lower part of the outer wall of the airbag 21. The air outlet direction of the air nozzle 22 is set along the tangential direction of the cyclone cavity, so that when the airbag 21 is squeezed, the airflow enters the cyclone cavity tangentially, forming a spiral airflow that rotates around the inner wall of the mounting box. When the airbag 21 is stretched, the air nozzle 22 draws in air, causing airflow disturbance and air pressure wave action to bridge the material.

[0032] A bidirectional air passage is provided between the air nozzle 22 and the air bag 21. The bidirectional air passage is an inlet air passage and an outlet air passage. Both the inlet air passage and the outlet air passage are equipped with one-way valves. When the air bag 21 is compressed, the outlet air passage sprays air through the cyclone chamber to form a spiral airflow. When the air bag 21 is stretched, air is replenished through the inlet air passage.

[0033] The shape of the outer wall of the airbag 21 near the mesh cylinder 10 is adapted to the outer surface of the mesh cylinder 10, and the shape of the protective window 9 near the mesh cylinder 10 is also adapted to the outer surface of the mesh cylinder 10. In this way, a uniform annular gap is formed between the outer wall of the airbag, the inner wall of the protective window and the outer wall of the mesh cylinder, making the spiral airflow more stable and making full use of the internal space of the installation box.

[0034] The connecting plate 20 is connected to the fixed column 16 via a spiral connecting assembly. The spiral connecting assembly includes a spiral plate 12 and a mounting block 15. Both ends of the mounting block 15 are fixedly connected to two sliders 13 via the spiral plate 12. The fixed column 16 is vertically inserted and fixedly connected to the mounting block 15. It moves up and down synchronously with the connecting plate 20. Two vertically extending long grooves 11 are opened on the side wall of the mesh cylinder 10. The spiral plate 12 is inserted into the long grooves 11 and can slide up and down in the long grooves 11. While the spiral plate 12 moves up and down with the slider, it spirally guides the airflow in the cyclone cavity to help form a vortex.

[0035] Both ends of the fixing column 16 are fixedly connected with plugs 17. The upper plug is positioned opposite to the small opening of the first conical bucket 26a, and the lower plug is positioned opposite to the small opening of the second conical bucket 26b. Both the fixing column 16 and the plugs 17 are made of deformable elastic material, preferably food-grade silicone. The diameter of the plug 17 is slightly larger than the inner diameter of the small opening of its corresponding conical bucket.

[0036] Driven by the connecting plate 20, the plug 17 can switch between the first position of blocking the small opening of the second conical hopper 26b, the second position of blocking the small opening of the first conical hopper 26a, and the middle position of not blocking any conical hopper opening.

[0037] Because the fixed column 16 and the plug 17 have elastic deformation capabilities, after the plug 17 abuts against and seals the conical bucket opening, the motor 18 can still drive the connecting plate 20 to continue moving a short preset stroke. During this process, the plug 17 is further deformed by compression, making it fit more tightly against the inner wall of the conical bucket opening, and the sealing effect is more reliable. At the same time, this deformable design also provides a safety margin for the control of the motor 18. When the plug 17 has been sealed in place, the motor 18 does not need to stop precisely immediately, and can continue to move within a certain stroke range without damaging the transmission components or being jammed by the plug, reducing the control precision requirements and improving the stability and service life of the system.

[0038] Spiral grooves 27 are provided on the outer wall of the first conical bucket 26a and the inner wall of the second conical bucket 26b. A spiral guide plate 25 is fixedly connected to the outer wall of the mesh cylinder 10. The spiral direction of the spiral grooves 27, the spiral guide plate 25 and the spiral plate 12 are consistent with the spiral angle. This design makes a continuous spiral airflow path formed in the cyclone cavity. The airflow ejected from the nozzle 22 begins to rotate under the guidance of the spiral grooves 27. It is continuously strengthened by the spiral guide plate 25 and the spiral plate 12 to form a stable swirling field covering the entire cyclone cavity.

[0039] The bottom of the mounting box 3 is detachably connected to and connected to a collection trough 5. There are two collection troughs 5, which are symmetrically distributed along the feeding path and located on the outer periphery of the bottom of the mesh cylinder 10. A one-way plate 24 is fixedly connected to the inner wall of the collection trough 5. The one-way plate 24 is inclined towards the bottom wall of the collection trough 5. A gap is left between the end of the one-way plate 24 near the bottom wall of the collection trough 5 and the bottom wall of the collection trough 5. During the cyclone separation process, the dust and tea hairs carried by the spiral airflow through the mesh cylinder 10 slide down along the one-way plate 24 and are deposited at the bottom of the collection trough 5 through the gap. Due to the inclined guiding effect of the one-way plate 24, the dust and tea hairs cannot escape in the opposite direction, ensuring the collection effect.

[0040] A sealing layer 23 is fixedly connected between the two collection tanks 5 to prevent debris from leaking from the gap between the collection tanks. Mounting plates 6 are fixedly connected to both sides of the collection tanks 5 to detachably fix the collection tanks 5 to the outer wall of the discharge nozzle 4 for easy regular cleaning.

[0041] Working principle: During the discharge process of a single batch of flower tea material, the cyclone mechanism automatically switches between normal de-crushing mode, bridging and arch breaking mode and downstream anti-blocking mode based on the real-time monitoring results of the bridging detection camera 8.

[0042] When a batch of flower tea material begins to enter the installation box 3 from the feed hopper 2 through the discharge nozzle 4, and the bridging detection camera 8 detects that flower tea material is passing through the installation box 3, the control unit starts the normal de-crushing mode.

[0043] Motor 18 drives lead screw 19 to rotate, causing connecting plate 20 to reciprocate up and down within a preset stroke. The upper and lower limit positions of this stroke are set: the upper limit of the stroke of plug 17 does not contact the small opening of the first conical hopper 26a, and the lower limit of the stroke does not contact the small opening of the second conical hopper 26b. At this time, the upper and lower material channels remain completely open, and the material can fall freely from the first conical hopper 26a into the second conical hopper 26b through the mesh cylinder 10.

[0044] During the reciprocating motion of the connecting plate 20, the airbag 21 is repeatedly squeezed and stretched. When the airbag 21 is squeezed, the internal gas is injected into the cyclone chamber at high speed through the air nozzle 22 along the tangential direction. Under the joint guidance of the spiral groove 27, the spiral guide plate 25 and the spiral plate 12, a spiral airflow that rotates stably around the inner wall of the mounting box 3 is formed. When the airbag 21 is stretched, it naturally draws in air from the outside to prepare for the next compression.

[0045] The spiral airflow passes through the mesh cylinder 10, performing swirling separation on the passing flower tea material. Larger materials such as intact rosebuds and tea leaves slide smoothly down the wall and enter the lower discharge nozzle 4 through the second conical hopper 26b. Lighter impurities such as dust and tea hairs are carried by the spiral airflow, pass through the mesh of the mesh cylinder 10, and enter the outer collection tank 5. Dust slides down along the one-way plate 24 and is deposited in the collection tank 5 through the bottom gap, unable to escape in the opposite direction. In this way, each batch of flower tea undergoes routine dust removal and cleaning treatment during the process of passing through the installation box 3, reducing the amount of dust falling into the packaging bag from the source.

[0046] When the bridging detection camera 8 detects that the expected flower tea material does not appear in the mesh cylinder 10 during the process of a batch of material passing through the cyclone cavity, it indicates that material bridging has occurred in the upstream discharge channel and the material cannot reach the installation box 3 normally. The control unit immediately switches the operating mode to the bridging and arch breaking mode.

[0047] Motor 18 drives lead screw 19 to rotate, causing connecting plate 20 to move downward to its maximum stroke position. Fixed column 16 moves downward synchronously with connecting plate 20, causing plug 17 below to contact and gradually seal the small opening of second conical bucket 26b. Since both fixed column 16 and plug 17 are made of deformable elastic material, plug 17 undergoes elastic deformation after contacting the inner wall of the small opening, forming a reliable seal by tightly fitting with the inner wall of the small opening. Motor 18 continues to drive connecting plate 20 downward for a short preset stroke, further increasing the deformation of plug 17 and making the seal even tighter. At this time, the small opening of second conical bucket 26b is completely closed, while the small opening of first conical bucket 26a is in an open state.

[0048] The connecting plate 20 squeezes the airbag 21 downwards. The gas in the airbag 21 is injected into the cyclone chamber at high speed along the tangential direction through the air nozzle 22. Because the plug 17 is closer to and blocks the small opening of the second conical bucket 26b, the airflow rushes upwards along the cyclone chamber and through the small opening of the first conical bucket 26a into the upper section of the discharge nozzle 4. Under the joint guidance of the spiral groove 27, the spiral guide plate 25 and the spiral plate 12, this upward counterflowing airflow enters the upper section of the discharge nozzle 4 in a spiral shape and directly acts on the bridging position.

[0049] It should be noted that the volume of the airbag 21 is configured such that the amount of gas discharged by a single complete compression is not less than half of the free space volume inside the installation box 3, and the air nozzle 22 is set along the tangential direction of the cyclone cavity. In conjunction with the spiral guide structures, the airflow generated by the airbag compression is ejected upward in the form of a highly concentrated rotating jet, with little energy loss and concentrated impact force.

[0050] The bridging of flower tea materials is essentially a temporary static equilibrium formed between strip-like materials due to friction and mechanical interlocking, and its structural strength is far lower than that of compacted clumps. The aforementioned upward-rushing high-speed spiral airflow, after passing through the small opening of the first conical hopper 26a and entering the upper section of the discharge nozzle 4, applies continuous dynamic pressure impact and dragging disturbance to the lower part of the bridging clumps. The airflow impacts from bottom to top, lifting and loosening the bridging clumps, breaking the static equilibrium between the materials, and causing the bridging structure to collapse and scatter rapidly.

[0051] After the bridging is broken, the bridging detection camera 8 confirms that the material in the mesh cylinder 10 is unobstructed. The motor 18 drives the lead screw 19 to rotate in the opposite direction, and the connecting plate 20 moves upward, causing the lower plug 17 to disengage from the small opening of the second conical hopper 26b. The material channel reopens, and the airbag 21 is stretched and sucked in during the upward movement of the connecting plate 20. The airbag 21 causes airflow disturbance and air pressure fluctuation during the suction process, which helps the scattered material after the bridging is broken to fall smoothly into the second conical hopper 26b and finally reach the lower discharge nozzle 4.

[0052] When a batch of material successfully passes through the cyclone chamber and the bridging detection camera 8 confirms that no bridging has occurred throughout the process, and the main body of the material has passed through the mesh cylinder 10 and is about to completely enter the second conical hopper 26b, the control unit switches to the downstream anti-blocking mode.

[0053] Motor 18 drives connecting plate 20 to move upward to a preset position, so that the upper plug 17 contacts and gradually seals the small opening of the first conical hopper 26a. Similarly, since the fixed column 16 and plug 17 have elastic deformation capabilities, plug 17 undergoes elastic deformation after contacting the inner wall of the small opening, forming a tight fit. Motor 18 can continue to drive connecting plate 20 to move upward a short preset stroke to further enhance the sealing reliability. At this time, the material coming from above is cut off, while the small opening of the lower second conical hopper 26b remains open, and the material can continue to be discharged downward to the discharge nozzle 4.

[0054] With the upper plug 17 remaining blocked, the airbag 21 is stretched during this process. The airbag 21 causes airflow disturbance and air pressure fluctuation during the suction process. At this time, the airflow disturbance and air pressure fluctuation act on the lower section of the discharge nozzle 4 located in the mounting box 3. If secondary bridging or retention occurs at this time, the airflow disturbance and air pressure fluctuation can act on the flower tea material, effectively preventing the flower tea material from secondary bridging or retention in the lower section discharge nozzle due to friction or hooking.

[0055] After the material is completely discharged, the motor 18 drives the connecting plate 20 back to the middle position, the upper plug 17 opens, and the normal crushing mode is restored, ready to receive the next batch of material.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A visual inspection device for flower tea packaging production, comprising a packaging machine (1), wherein the packaging machine (1) is provided with a feeding hopper (2) at the top and a discharging nozzle (4) communicating with the feeding hopper (2) inside, characterized in that: The middle section of the discharge nozzle (4) is fixedly equipped with an installation box (3). The installation box (3) is divided into a detection chamber and a cyclone chamber by a protective window (9). A bridging detection camera (8) is installed in the detection chamber. The top and bottom walls of the mounting box (3) are respectively provided with an upper material inlet and a lower material inlet arranged coaxially. A first conical hopper (26a) is fixed inside the upper material inlet, and a second conical hopper (26b) is fixed inside the lower material inlet. Both the first conical hopper (26a) and the second conical hopper (26b) are arranged with their larger openings facing upwards and their smaller openings facing downwards. A mesh cylinder (10) is fixedly installed between the larger openings of the first conical hopper (26a) and the second conical hopper (26b). The cyclone cavity is provided with a swirling mechanism, which includes a drive unit and a connecting plate (20). The connecting plate (20) is connected to the drive unit and can move up and down in the cyclone cavity. An airbag (21) is fixedly connected to the bottom of the connecting plate (20). The bottom of the airbag (21) is fixedly connected to the mounting box (3), so that when the connecting plate (20) moves downward, it squeezes the airbag (21) and when it moves upward, it stretches the airbag (21). An air nozzle (22) is fixedly installed and connected to the lower part of the outer wall of the airbag (21). Its air outlet direction is set along the tangent direction of the cyclone cavity, which is used to form a spiral airflow in the cyclone cavity when the airbag (21) is squeezed or stretched. The connecting plate (20) is connected to a fixed column (16) via a spiral connection assembly. Both ends of the fixed column (16) are fixedly connected to plugs (17), and the plugs (17) are respectively positioned opposite to the small openings of the first conical bucket (26a) and the second conical bucket (26b). It also includes a control unit, which is electrically connected to the bridging detection camera (8) and the drive unit respectively; The control unit drives the connecting plate (20) to switch between the intermediate material feeding position, the lower sealing and arch breaking position and the upper sealing and anti-blocking position according to the detection signal of the bridging detection camera (8).

2. The visual inspection device for flower tea packaging production according to claim 1, characterized in that: The inner wall of the mounting box (3) is fixedly installed with a shock-absorbing bracket (7) inside the detection cavity, and the bridging detection camera (8) is fixedly installed on the shock-absorbing bracket (7).

3. The visual inspection device for flower tea packaging production according to claim 1, characterized in that: The volume of the airbag (21) is configured such that the amount of gas discharged by a single complete compression is not less than half of the free space volume inside the mounting box (3); The shape of the outer wall of the airbag (21) near the mesh cylinder (10) is adapted to the outer surface of the mesh cylinder (10), and the shape of the protective window (9) near the mesh cylinder (10) is adapted to the outer surface of the mesh cylinder (10), forming an annular gap to make the spiral airflow more stable.

4. The visual inspection device for flower tea packaging production according to claim 1, characterized in that: The drive unit includes a motor (18), which is fixedly installed on the top of the mounting box (3). A lead screw (19) is fixedly installed at the output end of the motor (18). The lead screw (19) is vertically rotatably connected to the inner wall of the mounting box (3). A slide rod (14) is vertically fixedly connected to the inner wall of the mounting box (3). A slider (13) is provided on both the slide rod (14) and the lead screw (19). One slider (13) is threadedly connected to the lead screw (19), and the other slider (13) is sleeved and slidably connected to the slide rod (14). The outer walls of the connecting plate (20) are fixedly connected between the two sliders (13).

5. A visual inspection device for flower tea packaging production according to claim 4, characterized in that: The spiral connection assembly includes a spiral plate (12) and a mounting block (15). Both ends of the mounting block (15) are fixedly connected to two sliders (13) through the spiral plate (12). The fixing column (16) is vertically inserted and fixedly connected to the mounting block (15).

6. The visual inspection device for flower tea packaging production according to claim 5, characterized in that: The mesh tube (10) has two long grooves (11) for threading a spiral plate (12), which slides up and down within the long grooves (11).

7. A visual inspection device for flower tea packaging production according to claim 6, characterized in that: The outer wall of the first conical bucket (26a) and the inner wall of the second conical bucket (26b) are both provided with spiral grooves (27). The outer wall of the mesh cylinder (10) is fixedly connected with a spiral guide plate (25). The spiral direction of the spiral grooves (27), the spiral guide plate (25) and the spiral plate (12) are consistent with the spiral rise angle, so as to form a continuous spiral airflow path in the cyclone cavity.

8. The visual inspection device for flower tea packaging production according to claim 1, characterized in that: The bottom of the installation box (3) is detachably connected to and connected to a collection trough (5). There are two collection troughs (5) and they are symmetrically distributed along the feeding path. The two collection troughs (5) are detachably connected to the outer wall of the discharge nozzle (4). The collection trough (5) is located on the outer periphery of the bottom of the mesh cylinder (10). A one-way plate (24) is fixedly connected to the inner wall of the collection trough (5). The one-way plate (24) is inclined toward the bottom wall of the collection trough (5), and a gap is opened between the end of the one-way plate (24) near the bottom wall of the collection trough (5) and the collection trough (5). The gap is used to allow debris and tea hairs to pass through. A sealing layer (23) is fixedly connected between the two collection tanks (5), and an installation plate (6) is fixedly connected to both sides of the collection tanks (5).

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