Citrus fruit continuous packaging machine with damage-preventing positioning structure

Abstract

The invention relates to the technical field of fruit packaging equipment, in particular to a citrus fruit continuous packaging machine with an anti-damage positioning structure, which comprises an anti-damage positioning frame arranged close to fruit conveying equipment, a plurality of groups of positioning detection pipes are fixedly mounted on the anti-damage positioning frame through a supporting plate, and an anti-damage positioning detection system is integrated on the positioning detection pipes. The anti-damage positioning frame is further provided with a packaging conveying assembly matched with the positioning detection pipe outlet; the anti-damage positioning detection system comprises a pneumatic unit, a fruit detection part, a dust collection cavity, an annular airflow cavity I and a matched anti-damage buffer air bag; the positioning detection pipe is also provided with an annular airflow cavity II with a grouping positioning air bag; according to the invention, the integrated integration of detection, positioning, dust removal and grouping processes of citrus fruits is realized, the continuous packaging efficiency is improved through multi-channel parallel operation, the fruit damage rate is greatly reduced through a full-link flexible damage-proof structure, meanwhile, the equipment structure is simplified, and the packaging and grouping precision and the equipment operation stability are improved.

Description

Technical Field

[0001] This invention relates to the field of fruit packaging equipment technology, specifically a continuous packaging machine for citrus fruits with a damage-prevention positioning structure. Background Technology

[0002] Citrus fruits are widely cultivated and in high demand in my country. Packaging is a core process in the post-harvest commercial processing of citrus fruits, ensuring their quality during storage and transportation and enhancing their commercial value. With the large-scale and standardized development of the fresh produce distribution industry, citrus fruit packaging has gradually shifted from traditional manual packaging to automated continuous packaging. Continuous packaging machines with anti-damage positioning structures have become key equipment for the post-harvest commercial processing of citrus fruits. This type of equipment needs to be adapted to the thin peel and susceptibility to damage of citrus fruits, while also meeting the needs of batch continuous packaging of fruits of different sizes. It typically integrates multiple functions such as fruit conveying, posture positioning, quality and specification detection, sorting and grouping, and packaging transfer. Its anti-damage effect, positioning accuracy, and continuous operation efficiency directly determine the commercial processing effect and production efficiency of citrus packaging, making it a key research focus in the field of fresh fruit packaging equipment.

[0003] Existing continuous packaging machines for citrus fruits generally separate the processes of fruit specification inspection, positioning and protection, and quantitative grouping. These processes require multiple transfer and conveying mechanisms for connection, resulting in a complex overall structure, large footprint, and a high risk of skin collision and friction damage during multi-stage fruit transfer. Furthermore, the serial processing mode cannot achieve synchronous and continuous operation of fruits in multiple channels, making it difficult to ensure both the effectiveness of fruit damage protection and the efficiency of continuous packaging. This makes it unsuitable for the large-scale, standardized commercial packaging needs of citrus fruits. Therefore, there is an urgent need to develop a continuous packaging machine for citrus fruits with a damage-prevention positioning structure to overcome the shortcomings in current practical applications. Summary of the Invention

[0004] The purpose of this invention is to provide a continuous packaging machine for citrus fruits with an anti-damage positioning structure, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A continuous packaging machine for citrus fruits with an anti-damage positioning structure includes an anti-damage positioning frame, which is positioned close to the fruit conveying equipment, and further includes:

[0007] A support plate is fixedly installed on the anti-damage positioning frame, and the anti-damage positioning frame is provided with multiple positioning detection tubes;

[0008] The fruit conveying equipment is used to convey citrus fruits into multiple positioning detection tubes, where the citrus fruits are detected and positioned to prevent damage.

[0009] And a damage prevention positioning and detection system, which is located on the positioning and detection tube and is used to prevent damage to citrus fruits falling through the positioning and detection tube;

[0010] The anti-damage positioning frame is also equipped with a packaging conveying assembly, which is used to transport the citrus fruits positioned and detected by the anti-damage positioning detection system to the packaging machine.

[0011] As a further aspect of the present invention: the damage-proof positioning frame is provided with a fruit transfer port, which is located close to the packaging conveying assembly and is used for conveying citrus fruits.

[0012] As a further aspect of the present invention: each of the multiple positioning detection tubes is provided with an anti-collision guide bucket at its top end, and the anti-collision guide bucket is positioned close to the fruit conveying equipment for guiding the flow of citrus fruits.

[0013] As a further aspect of the present invention: the packaging conveying assembly includes:

[0014] A positioning and transfer support is fixedly installed on the damage-resistant positioning frame and located directly below the outlet of the positioning detection tube;

[0015] And a packaging transfer belt, which is located on the positioning and transfer support, for transferring the positioned and inspected citrus fruits to the packaging machine.

[0016] As a further aspect of the present invention: the damage prevention positioning and detection system includes:

[0017] An annular airflow chamber one is fixedly installed on the positioning detection tube, and the annular airflow chamber one is provided with two air holes;

[0018] The anti-damage buffer airbags are multiple in number, and the multiple anti-damage buffer airbags are evenly distributed in the positioning detection tube, and the multiple anti-damage buffer airbags are connected to the annular airflow cavity through holes.

[0019] The system also includes a pneumatic unit connected to the support plate and connected to the annular airflow cavity via an air hole. The pneumatic unit is used to control the expansion and contraction of the damage-prevention cushioning airbag.

[0020] As a further aspect of the present invention: the damage prevention positioning and detection system further includes:

[0021] A fruit detection unit, which is fixedly installed on the positioning detection tube, is used to detect the diameter of citrus fruits;

[0022] The vacuum chamber is fixedly installed on the positioning detection tube and located between the annular airflow chamber and the fruit detection part. The vacuum chamber is also connected to the pneumatic unit.

[0023] As a further aspect of the present invention: the pneumatic unit includes:

[0024] A side support plate is fixedly mounted on the support plate and positioned close to the positioning detection tube.

[0025] And a pneumatic charging and suction control manifold, which is fixedly installed on the side support plate;

[0026] Each of the positioning detection tubes is equipped with two pneumatic charging and suction control main pipes, one end of each of the two pneumatic charging and suction control main pipes being connected to an external air source and a suction device, respectively.

[0027] Furthermore, the pneumatic charging and suction control main pipe is connected to the dust suction chamber and air vents through multiple branch pipes.

[0028] As a further aspect of the present invention, it also includes: a second annular airflow cavity, which is fixedly installed on the positioning detection tube and connected to the anti-damage positioning detection system;

[0029] The system includes multiple sets of fruit packaging positioning parts, which are located inside the positioning detection tube and connected to the annular airflow cavity. The connecting holes are used to position two or more citrus fruits as a group to prevent damage, and the group of citrus fruits is transported to the packaging machine through the packaging conveying assembly.

[0030] As a further aspect of the present invention: the multiple sets of fruit packaging positioning parts include at least one set of positioning airbag one and positioning airbag two, and the positioning airbag one and positioning airbag two are both fixedly installed on the inner wall of the positioning detection tube.

[0031] The multiple positioning airbags are combined to form a buffer ring, and the multiple positioning airbags are combined to form another buffer ring. The height of the interval between the two buffer rings is greater than the height of the citrus fruit.

[0032] As a further aspect of the present invention: the annular airflow cavity II is provided with a first air chamber, a second air chamber, and a placement chamber;

[0033] Both the first positioning airbag and the second positioning airbag are connected to the first air chamber and the second air chamber respectively through connecting holes;

[0034] Multiple control air pipes are fixedly installed inside the placement chamber. The control air pipes are connected to the damage prevention positioning and detection system and are respectively connected to the first air chamber and the second air chamber.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] 1. By using a multi-channel parallel positioning and detection tube structure, the specification detection, surface dust removal, flexible positioning and quantitative grouping processes of citrus fruits are integrated into the same conveying channel. The entire process can be completed in a single drop of the fruit, without the need for multiple transfer connections. This enables the synchronous and continuous operation of multiple groups of fruits, significantly improving the continuity and efficiency of citrus fruit packaging.

[0037] 2. A flexible anti-damage system was constructed, covering the entire process from feeding guidance, falling buffer, positioning and grouping to discharge receiving. Through the flexible guiding and buffering of the anti-collision guide bucket, the flexible deceleration and support of the anti-damage buffer airbag, the flexible limiting and grouping of the positioning airbag, and the flexible receiving and protection of the packaging transfer belt, hard contact between the fruit and the equipment is avoided throughout the process. This fundamentally solves the problem of skin bumps and crushing during the packaging of citrus fruits, ensuring the commercial quality and yield of the fruit.

[0038] 3. The fruit inspection department collects the outer diameter specification data of the fruit in real time, and simultaneously links multiple fruit packaging positioning departments to complete the quantitative grouping and positioning of the corresponding specifications of the fruit. The quantity of fruit in a single package can be flexibly adjusted according to packaging needs, without the need to set up an additional independent sorting and grouping mechanism, which improves the accuracy of packaging grouping and the adaptability of the equipment to different specifications and packaging needs.

[0039] 4. Using the same set of pneumatic units, the negative pressure dust removal of fruits, the inflation and deflation control of the anti-damage buffer airbags, and the timing control of the group positioning airbags are realized simultaneously. There is no need to configure separate dust removal equipment and multiple sets of drive mechanisms, which greatly simplifies the overall structure of the equipment, reduces the manufacturing cost and operating energy consumption of the equipment, and at the same time ensures the precise matching of the action rhythm of each process and improves the stability of equipment operation. Attached Figure Description

[0040] Figure 1 This is a three-dimensional structural diagram of the anti-damage positioning frame in an embodiment of the present invention.

[0041] Figure 2 This is a three-dimensional structural diagram of the anti-collision guide bucket in an embodiment of the present invention.

[0042] Figure 3 This is a schematic diagram of the distribution of positioning detection tubes in an embodiment of the present invention.

[0043] Figure 4 This is a three-dimensional structural diagram of the positioning and transfer support in an embodiment of the present invention.

[0044] Figure 5 This is a cross-sectional view of the support plate in an embodiment of the present invention.

[0045] Figure 6 This is an enlarged structural schematic diagram of the annular airflow cavity in an embodiment of the present invention.

[0046] Figure 7 This is a top view schematic diagram of the distribution of anti-damage buffer airbags in an embodiment of the present invention.

[0047] Figure 8 This is an enlarged structural schematic diagram of the annular airflow cavity two in an embodiment of the present invention.

[0048] Figure 9 This is a three-dimensional structural diagram showing the distribution of positioning airbag one and positioning airbag two in an embodiment of the present invention.

[0049] Figure 10 This is a cross-sectional view of the second annular airflow cavity in an embodiment of the present invention.

[0050] Figure 11 This is a front view schematic diagram of the cross-sectional structure of the first and second air chambers in an embodiment of the present invention.

[0051] In the diagram: 1-Damage-proof positioning frame, 2-Positioning and transfer support, 3-Packaging transfer belt, 4-Support plate, 5-Fruit conveying equipment, 6-Anti-collision guide bucket, 7-Positioning detection tube, 8-Side support plate, 9-Pneumatic filling and suction control main pipe, 10-Branch pipe, 11-Fruit transfer port, 12-Annular airflow chamber one, 13-Annular airflow chamber two, 14-Dust suction chamber, 15-Fruit detection section, 16-Air hole, 17-Damage-proof buffer airbag, 18-Positioning airbag one, 19-Positioning airbag two, 20-Connecting hole, 21-Control air pipe, 22-First air chamber, 23-Second air chamber, 24-Placement chamber, 25-Multiple sets of fruit packaging positioning sections. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0054] Please see Figures 1-11The present invention provides a continuous packaging machine for citrus fruits with an anti-damage positioning structure, including an anti-damage positioning frame 1, which is disposed near the fruit conveying device 5, and further comprising:

[0055] Support plate 4, which is fixedly installed on the anti-damage positioning frame 1, and the anti-damage positioning frame 1 is provided with multiple positioning detection tubes 7;

[0056] The fruit conveying device 5 is used to convey citrus fruits into the multiple positioning detection tubes 7 respectively, and the citrus fruits are detected and positioned to prevent damage within the multiple positioning detection tubes 7.

[0057] And a damage prevention positioning and detection system, which is located on the positioning and detection tube 7 and is used to prevent damage to citrus fruits falling through the positioning and detection tube 7;

[0058] The anti-damage positioning frame 1 is also equipped with a packaging conveying assembly, which is used to transport the citrus fruits positioned and detected by the anti-damage positioning detection system to the packaging machine.

[0059] This invention uses an anti-damage positioning frame 1 as the mounting base for the entire machine. The support plate 4 is fixedly installed on the anti-damage positioning frame 1, providing stable mounting support for multiple sets of positioning detection tubes 7. During operation, the front-end fruit conveying device 5 evenly distributes the citrus fruits to be packaged into each positioning detection tube 7. The multi-channel parallel positioning detection tubes 7 enable simultaneous processing of multiple sets of fruits, significantly improving the processing efficiency of continuous packaging. Furthermore, the distance between adjacent positioning detection tubes 7 ensures that the citrus fruits reach the packaging conveying assembly at fixed intervals, and then reach the packaging machine for continuous packaging. After entering the positioning detection tube 7, the citrus fruits, relying on the anti-damage positioning detection system integrated on the positioning detection tube 7, are guided as they fall along the tube. During the process, non-destructive positioning and quality and specification testing are completed simultaneously, realizing the integration of testing and positioning processes. This avoids secondary collision damage to the fruit during multi-process transfer. After positioning and testing, the fruit falls through the outlet of the positioning and testing tube 7 onto the packaging conveyor assembly. The packaging conveyor assembly transports the fruit evenly and orderly to the rear packaging machine to complete continuous packaging operations. Through the coordination of the above-mentioned overall structure, continuous operation of citrus fruits from transportation, positioning, testing to packaging and transfer is realized. At the same time, the integrated anti-damage structure prevents the fruit peel from being bruised or crushed throughout the process, solving the core problems of high damage rate, poor positioning accuracy, and low continuous packaging efficiency in the existing technology of citrus fruit packaging.

[0060] In one embodiment of the present invention, please refer to Figures 1-11The anti-damage positioning frame 1 is provided with a fruit transfer port 11, which is located near the packaging conveying assembly and is used for conveying citrus fruits.

[0061] Each of the multiple positioning detection tubes 7 is provided with an anti-collision guide bucket 6 at its top end. The anti-collision guide bucket 6 is located close to the fruit conveying device 5 and is used to guide the flow of citrus fruits.

[0062] Please see Figures 1-4 The packaging conveying assembly includes:

[0063] Positioning and transfer support 2, which is fixedly installed on the damage-proof positioning frame 1 and located directly below the outlet of the positioning detection tube 7;

[0064] And a packaging transfer belt 3, which is located on the positioning and transfer support 2, and is used to transfer the positioned and inspected citrus fruits to the packaging machine.

[0065] In this embodiment, by setting an anti-collision guide hopper 6 at the top of the positioning detection tube 7, and the anti-collision guide hopper 6 adopts a funnel-shaped structure that is wider at the top and narrower at the bottom, and the inner wall is fitted with a food-grade flexible sponge anti-collision pad layer commonly used in the fruit and vegetable packaging field, the fruit can be accurately guided by the gradual inner diameter structure of the anti-collision guide hopper 6 during the process of the fruit conveying equipment 5 conveying citrus fruits to the positioning detection tube 7, so as to avoid the fruit getting stuck or deviating. At the same time, the flexible pad layer on the inner wall buffers the impact force of the falling fruit, avoiding the fruit peel from directly colliding with the metal structure and causing mechanical damage, thus ensuring the stability of the fruit's posture when entering the positioning detection tube 7.

[0066] After the citrus fruits have completed detection and positioning, as they fall from the outlet of the positioning detection tube 7, the positioning transfer support 2, which is fixedly installed on the anti-damage positioning frame 1 and located directly below the outlet of the positioning detection tube 7, provides stable installation and tension support for the packaging transfer belt 3. The surface of the packaging transfer belt 3 is also fitted with a food-grade flexible sponge anti-collision pad, which can catch the falling fruit and buffer the impact, further reducing the risk of fruit damage. Simultaneously, the packaging transfer belt 3 adopts a step-by-step conveying mode that precisely matches the falling rhythm of the fruit inside the positioning detection tube 7, ensuring the water content is controlled. The fruits are arranged in an orderly manner and then stably transported to the back-end packaging machine through the fruit transfer port 11 on the anti-damage positioning frame 1, which corresponds to the packaging conveyor component. This prevents the fruits from shifting or rolling during the transfer process and ensures the positioning accuracy of subsequent packaging processes. Through the cooperation of the anti-collision guide bucket 6, the positioning and transfer support 2, the packaging transfer belt 3, and the fruit transfer port 11, the entire process of guiding the citrus fruits in, receiving and transferring them is protected against damage and accurately positioned, ensuring the stability and yield of the fruit transport during continuous packaging.

[0067] In one embodiment of the present invention, please refer to Figures 1-11 The damage prevention positioning and detection system includes:

[0068] An annular airflow cavity 12 is fixedly installed on the positioning detection tube 7, and two air holes 16 are provided on the annular airflow cavity 12.

[0069] Damage-preventing buffer airbags 17, the number of which is multiple, the multiple damage-preventing buffer airbags 17 are evenly distributed in the positioning detection tube 7, and the multiple damage-preventing buffer airbags 17 are connected to the annular airflow cavity 12 through holes;

[0070] And a pneumatic unit, which is connected to the support plate 4 and communicates with the annular airflow cavity 12 through the air hole 16. The pneumatic unit is used to control the expansion and contraction of the damage-prevention buffer airbag 17.

[0071] The damage prevention positioning and detection system also includes:

[0072] Fruit detection unit 15, which is fixedly installed on the positioning detection tube 7, is used to detect the diameter of citrus fruits;

[0073] The vacuum chamber 14 is fixedly installed on the positioning detection tube 7 and located between the annular airflow chamber 12 and the fruit detection part 15. The vacuum chamber 14 is also connected to the pneumatic unit.

[0074] The pneumatic unit includes:

[0075] Side support plate 8, which is fixedly installed on the support plate 4 and is located close to the positioning detection tube 7;

[0076] And a pneumatic charging and suction control manifold 9, which is fixedly installed on the side support plate 8;

[0077] Each of the positioning detection tubes 7 is provided with two pneumatic charging and suction control main pipes 9, one end of each of the two pneumatic charging and suction control main pipes 9 being connected to an external air source and a suction device, respectively.

[0078] Furthermore, the pneumatic charging and suction control main pipe 9 is connected to the dust suction chamber 14 and the air hole 16 through multiple branch pipes 10 respectively.

[0079] In this embodiment, the side support plate 8 fixed on the support plate 4 provides stable installation support for the pneumatic charging and suction control main pipe 9. The two pneumatic charging and suction control main pipes 9 configured for each positioning detection pipe 7 are respectively connected to the external air source and the suction equipment to form an independent charging and suction control circuit. The two pneumatic charging and suction control main pipes 9 are connected to the air hole 16 and the dust suction chamber 14 of the annular airflow chamber 12 through multiple branch pipes 10, so as to realize the independent control of the charging and suction air path.

[0080] After citrus fruits enter the positioning detection tube 7 through the anti-collision guide bucket 6, they first pass through the fruit detection section 15. The fruit detection section 15 uses multiple sets of infrared beam diameter detection sensors commonly used in the field of fruit and vegetable grading. It can collect the outer diameter data of the fruit in real time during the falling process, complete the grading detection of fruit specifications, and provide data support for subsequent packaging and grouping.

[0081] After passing through the fruit inspection section 15, the fruit continues to fall into the pipe section corresponding to the dust suction chamber 14. The pneumatic charging and suction control main pipe 9, which is connected to the dust suction chamber 14, generates negative pressure through the suction device. Multiple sets of dust suction holes opened on the inner wall of the dust suction chamber 14 are used to perform negative pressure adsorption and cleaning of dust and residual fruit pieces attached to the surface of the fruit, so as to avoid impurities affecting the accuracy of subsequent testing and ensure the cleanliness of the fruit before packaging. This negative pressure dust removal structure is a general supporting technology in the field of fruit and vegetable packaging pretreatment. It can be integrated and adapted with the pneumatic system of this invention without the need for additional independent dust removal equipment, simplifying the overall structure.

[0082] After dust removal, the fruit continues to fall into the pipe section corresponding to the annular airflow chamber 12. The pneumatic inflation control main pipe 9, connected to the annular airflow chamber 12, injects compressed gas into the annular airflow chamber 12 via an external air source through branch pipes 10 and air holes 16. After entering the annular airflow chamber 12, the compressed gas enters through the connecting holes into multiple sets of anti-damage buffer airbags 17 evenly distributed on the inner wall of the positioning detection pipe 7. This causes the multiple sets of anti-damage buffer airbags 17 to expand synchronously towards the center of the pipe, forming a ring-shaped flexible buffer limiting structure (the degree of expansion can be controlled based on data detected by the diameter detection sensor). By controlling the inflation pressure to adjust the expansion of the anti-damage buffer airbags 17, the falling citrus fruit is gently supported and slowed down, preventing the fruit from colliding with the support below due to excessive free fall speed. To prevent collision damage, multiple evenly distributed airbags can center and position the fruit, ensuring the stability of the fruit's falling posture. After the fruit completes positioning and deceleration, the pneumatic system switches to suction mode, using a suction device to extract the gas from the anti-damage buffer airbag 17, causing the airbag to shrink and reset. The fruit can then continue to fall at a constant speed onto the packaging conveyor assembly. Through the coordinated operation of the annular airflow chamber 12, the anti-damage buffer airbag 17, the fruit detection unit 15, the dust suction chamber 14, and the pneumatic unit, specification detection, surface dust removal, flexible deceleration, and centering positioning are completed simultaneously during a single fruit fall. This achieves integrated detection and anti-damage positioning, significantly improving the processing efficiency of continuous packaging. At the same time, pneumatic flexible control avoids hard contact between the fruit and the equipment, minimizing the rate of fruit skin damage.

[0083] In one embodiment of the present invention, please refer to Figures 1-11 It also includes: an annular airflow cavity 2 13, which is fixedly installed on the positioning detection tube 7 and connected to the damage prevention positioning detection system;

[0084] The system includes multiple sets of fruit packaging positioning parts 25, which are located inside the positioning detection tube 7 and connected to the annular airflow cavity 13. The connecting hole 20 is used to position two or more citrus fruits as a group to prevent damage, and the group of citrus fruits is transported to the packaging machine through the packaging conveying assembly.

[0085] The multiple sets of fruit packaging positioning parts 25 include at least one set of positioning airbag 18 and positioning airbag 29, and the positioning airbag 18 and positioning airbag 29 are both fixedly installed on the inner wall of the positioning detection tube 7.

[0086] The multiple positioning airbags 18 are combined to form a buffer ring, and the multiple positioning airbags 19 are combined to form another buffer ring. The height of the interval between the two buffer rings is greater than the height of the citrus fruit.

[0087] After two or more citrus fruits arrive at the multi-group fruit packaging positioning section 25, they fall sequentially onto the packaging conveyor assembly. This allows two or more citrus fruits to be packaged together as a single fruit package, preventing poor fruit quality caused by collisions between fruits in a group.

[0088] The annular airflow cavity 13 is provided with a first air chamber 22, a second air chamber 23 and a placement chamber 24.

[0089] The positioning airbag 18 and the positioning airbag 29 are respectively connected to the first air chamber 22 and the second air chamber 23 through the connecting hole 20.

[0090] Multiple control air pipes 21 are fixedly installed inside the placement chamber 24. The control air pipes 21 are connected to the damage prevention positioning and detection system and are respectively connected to the first air chamber 22 and the second air chamber 23.

[0091] In this embodiment, an annular airflow chamber 2 13 is fixedly installed on the positioning detection tube 7. The annular airflow chamber 2 13 is divided into a first air chamber 22, a second air chamber 23 and a placement chamber 24. Multiple control air pipes 21 in the placement chamber 24 are connected to the pneumatic charging and suction control main pipe 9 of the front-end anti-damage positioning detection system, so that the pneumatic control of group positioning and the front-end detection and buffering pneumatic system form an integrated control loop, ensuring the precise matching of the action rhythm of each process.

[0092] The positioning airbags 18 and 19 of the multiple fruit packaging positioning section 25 are connected to the first air chamber 22 and the second air chamber 23 respectively through the connecting hole 20. The multiple positioning airbags 18 are evenly distributed along the inner wall of the positioning detection tube 7 to form an upper buffer ring, and the multiple positioning airbags 19 are evenly distributed along the inner wall of the positioning detection tube 7 to form a lower buffer ring. The height of the gap between the upper and lower buffer rings is greater than the maximum outer diameter of a single citrus fruit, ensuring that a single fruit can be stably contained in the positioning area between the two buffer rings, while another fruit falls into the upper buffer ring formed by the multiple positioning airbags 18. This allows two fruits to arrive at the outlet end of the positioning detection tube 7 at the same time without collision. As the packaging conveyor belt 3 moves slowly, the two fruits can arrive at the packaging conveyor belt 3 side by side to achieve the purpose of packaging two fruits together. For more than two fruits, more buffer rings can be set up to achieve this, which will not be elaborated on here.

[0093] Specifically, during equipment operation, after the front-end fruit inspection unit 15 completes the fruit specification inspection, it transmits the inspection data to the overall control system. The control system, based on the preset packaging grouping specifications, independently controls the inflation and deflation of the first air chamber 22 and the second air chamber 23 via the control air pipe 21. When the first qualified citrus fruit falls into the area between positioning airbag 18 and positioning airbag 29, the control system first inflates the second air chamber 23 with compressed gas via the control air pipe 21, causing positioning airbag 29 to expand towards the center of the tube, forming a lower limit buffer ring to flexibly support the falling fruit and prevent it from falling further. Then, compressed gas is inflated into the first air chamber 22, causing positioning airbag 18 to expand towards the center of the tube, forming an upper limit buffer ring. This stably positions the first fruit within the closed area between the two buffer rings, achieving damage-free positioning of a single fruit. Subsequent fruits to be grouped are positioned sequentially according to the above process. In the storage process, when the number of fruits stored in the positioning system reaches the preset number of packaging groups, the control system first controls the positioning airbag 18 to remain inflated to prevent subsequent fruits from falling and interfering with the grouping. Then, it controls the positioning airbag 2 to deflate, so that the grouped fruits fall sequentially and at a uniform speed onto the packaging conveyor belt 3 below, forming a fruit group that matches the preset packaging specifications. During the falling process, the timing control of the upper and lower airbags prevents collisions between fruits within the group, ensuring the quality of the fruits. After the falling and discharge of a group of fruits, the positioning airbag 219 is inflated again, and the positioning airbag 18 is deflated, so that the positioning and grouping operation of the next group of fruits can be carried out. Through the coordinated cooperation of the annular airflow chamber 23, the multiple fruit packaging positioning parts 25, the positioning airbag 18, the positioning airbag 219, the matching air chamber, and the control air pipe 21, the automated quantitative grouping of citrus fruits linked with the front-end detection process is realized, replacing the manual or mechanical feeding and grouping mode in the existing technology.

[0094] The entire process of fruit detection, positioning, and grouping can be completed within the positioning detection tube 7, greatly simplifying the overall structure of the machine. At the same time, through the flexible limiting and timing control of the pneumatic airbag, collision damage to the fruit during the grouping process is completely avoided, ensuring grouping accuracy and packaging yield. This enables continuous and damage-free packaging of citrus fruits throughout the entire process. In addition, each of the above air tubes is equipped with a corresponding solenoid valve to achieve intelligent control of on / off states, which will not be elaborated on here.

[0095] It should be noted that, in this invention, unless otherwise explicitly specified and limited, the terms "sliding," "rotating," "fixed," and "equipped" should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0096] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuous packaging machine for citrus fruits with an anti-damage positioning structure, comprising an anti-damage positioning frame, wherein the anti-damage positioning frame is disposed near the fruit conveying equipment, characterized in that, Also includes: A support plate is fixedly installed on the anti-damage positioning frame, and the anti-damage positioning frame is provided with multiple positioning detection tubes; The fruit conveying equipment is used to convey citrus fruits into multiple positioning detection tubes, where the citrus fruits are detected and positioned to prevent damage. And a damage prevention positioning and detection system, which is located on the positioning and detection tube and is used to prevent damage to citrus fruits falling through the positioning and detection tube; The anti-damage positioning frame is also equipped with a packaging conveying assembly, which is used to transport the citrus fruits positioned and detected by the anti-damage positioning detection system to the packaging machine.

2. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 1, characterized in that, The damage-proof positioning frame is equipped with a fruit transfer port, which is located near the packaging conveying assembly and is used for conveying citrus fruits.

3. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 2, characterized in that, Each of the positioning detection tubes is equipped with an anti-collision guide bucket at its top end. The anti-collision guide bucket is positioned close to the fruit conveying equipment and is used to guide the flow of citrus fruits.

4. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to any one of claims 1-3, characterized in that, The packaging conveying assembly includes: A positioning and transfer support is fixedly installed on the damage-resistant positioning frame and located directly below the outlet of the positioning detection tube; And a packaging transfer belt, which is located on the positioning and transfer support, for transferring the positioned and inspected citrus fruits to the packaging machine.

5. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 1, characterized in that, The damage prevention positioning and detection system includes: An annular airflow chamber one is fixedly installed on the positioning detection tube, and the annular airflow chamber one is provided with two air holes; The anti-damage buffer airbags are multiple in number, and the multiple anti-damage buffer airbags are evenly distributed in the positioning detection tube, and the multiple anti-damage buffer airbags are connected to the annular airflow cavity through holes. The system also includes a pneumatic unit connected to the support plate and connected to the annular airflow cavity via an air hole. The pneumatic unit is used to control the expansion and contraction of the damage-prevention cushioning airbag.

6. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 5, characterized in that, The damage prevention positioning and detection system also includes: A fruit detection unit, which is fixedly installed on the positioning detection tube, is used to detect the diameter of citrus fruits; The vacuum chamber is fixedly installed on the positioning detection tube and located between the annular airflow chamber and the fruit detection part. The vacuum chamber is also connected to the pneumatic unit.

7. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 6, characterized in that, The pneumatic unit includes: A side support plate is fixedly mounted on the support plate and positioned close to the positioning detection tube. And a pneumatic charging and suction control manifold, which is fixedly installed on the side support plate; Each of the positioning detection tubes is equipped with two pneumatic charging and suction control main pipes, one end of each of the two pneumatic charging and suction control main pipes being connected to an external air source and a suction device, respectively. Furthermore, the pneumatic charging and suction control main pipe is connected to the dust suction chamber and air vents through multiple branch pipes.

8. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 1, characterized in that, Also includes: A second annular airflow cavity is fixedly installed on the positioning detection tube and connected to the damage prevention positioning detection system. The system includes multiple sets of fruit packaging positioning parts, which are located inside the positioning detection tube and connected to the annular airflow cavity. The connecting holes are used to position two or more citrus fruits as a group to prevent damage, and the group of citrus fruits is transported to the packaging machine through the packaging conveying assembly.

9. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 8, characterized in that, The multiple sets of fruit packaging positioning parts include at least one set of positioning airbag one and positioning airbag two, and both positioning airbag one and positioning airbag two are fixedly installed on the inner wall of the positioning detection tube. The multiple positioning airbags are combined to form a buffer ring, and the multiple positioning airbags are combined to form another buffer ring. The height of the interval between the two buffer rings is greater than the height of the citrus fruit.

10. The continuous packaging machine for citrus fruits with an anti-damage positioning structure according to claim 9, characterized in that, The annular airflow cavity II is provided with a first air chamber, a second air chamber, and a placement chamber. Both the first positioning airbag and the second positioning airbag are connected to the first air chamber and the second air chamber respectively through connecting holes; Multiple control air pipes are fixedly installed inside the placement chamber. The control air pipes are connected to the damage prevention positioning and detection system and are respectively connected to the first air chamber and the second air chamber.

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