A device for grading and preselecting fruits of the wild gourd

Abstract

This utility model discloses a pre-sorting device for wild melon fruit grading. Relating to the field of fruit sorting technology, the device includes a frame with multiple equally spaced sorting pools arranged in the center of its upper surface; a conveying mechanism mounted on a support on the frame; a tensioning mechanism mounted on the frame and connected to the conveying mechanism; and multiple air separation mechanisms, all mounted on the frame. This pre-sorting device for wild melon fruit grading utilizes a composite force field design—using upward airflow from the lower air inlet to lift the fruit and horizontal airflow from the upper air inlet to push the fruit—to ensure that the fruit's trajectory is determined solely by weight, eliminating shape interference and achieving precise grading. This orthogonal airflow design significantly improves sorting accuracy, outperforming the single airflow sorting methods of existing patents.

Description

Technical Field

[0001] This utility model relates to the field of fruit sorting technology, specifically a pre-sorting device for wild melon fruit grading. Background Technology

[0002] Sorting wild melons requires a lot of manpower. Manual fruit sorting is inefficient and greatly reduces the economic benefits for fruit farmers. Using ordinary sorting devices can cause mechanical damage to the fruit.

[0003] Utility model patent CN216368962U discloses a pneumatic fruit sorting device, comprising a conveyor belt for transporting fruits, multiple air boxes, multiple fans, a heightening plate, a guide rail, and multiple collection frames. The multiple air boxes are arranged sequentially at their output ends along the conveyor belt's transport direction, and each air box has an air outlet on its top surface. Multiple fans are arranged one-to-one on one side of each air box, with their air outlets connected to the air inlets of their corresponding air boxes. The heightening plate is parallel to the conveyor belt's transport direction, and one side is vertically fixed to the top surface of the multiple air boxes near the fans. The guide rail is perpendicular to the conveyor belt's transport direction, with one end fixed to the top of the heightening plate and the other end fixed to the side of the air box away from the fans. By blowing airflow generated by the fans out from the air outlets on the top surface of the air boxes, lighter fruits can be suspended, thereby sorting out relatively heavier fruits. This sorting device has a simple structure, is easy to operate, and is applicable to the sorting of fruits of different sizes and varieties.

[0004] However, existing sorting devices rely solely on upward-blowing airflow from the top of the bellows to achieve sorting. When fruits are irregularly shaped, the force distribution and buoyancy distribution of the airflow on the fruit change due to shape differences. This results in chaotic movement trajectories for fruits of similar weight but different shapes, making accurate weight-based grading impossible. For example, oblate fruits may be lifted further by the airflow due to their larger surface area, while round fruits may fall to a closer collection frame due to their concentrated center of gravity, causing sorting errors. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a wild melon fruit grading and pre-selection device, solving the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wild melon fruit grading and pre-selection device, comprising:

[0007] The frame has multiple equally spaced sorting pools on the upper surface of the frame, the sorting pools are filled with cleaning liquid, and the frame is fixed at each of the four corners of the upper surface of the frame for connecting the conveying mechanism.

[0008] A conveying mechanism, mounted on a support on a frame, is used to convey wild melon fruits;

[0009] The tensioning mechanism is mounted on the frame and connected to the conveying mechanism to keep the conveying mechanism in a taut state.

[0010] The gas separation mechanism includes multiple gas separation mechanisms, each mounted on a frame. Each gas separation mechanism corresponds to a sorting pool and is used to sort the fruits on the conveying mechanism into different sorting pools according to their weight.

[0011] Preferably, the conveying mechanism includes a motor fixed on one of the supports, a transmission rod is provided between two adjacent supports, and the output end of the motor is connected to one of the transmission rods.

[0012] Preferably, one end of the transmission rod is provided with two transmission gears arranged side by side, a baffle is fixed on one side of the transmission gears, and a conveyor belt is provided between the two transmission gears that are far apart. The two conveyor belts cooperate to transport the wild melon fruit. The inner side of the conveyor belt is provided with toothed grooves, which mesh with the transmission gears.

[0013] Preferably, the tensioning mechanism includes a fixed plate fixed to the middle of one side of the upper surface of the frame, a dovetail groove is provided in the middle of one side of the fixed plate, a dovetail slider is provided in the upper inner cavity of the dovetail groove, the bottom end of the dovetail slider is connected to the lower inner wall of the dovetail groove by a spring, a movable plate is fixed to the outside of the dovetail slider, and two clamping gears are connected to the middle of the outside of the movable plate by a connecting shaft, and the two clamping gears respectively mesh with the tooth grooves on the two conveyor belts.

[0014] Preferably, the gas separation mechanism includes a mounting plate fixed to one side of the upper surface of the frame, and a lower air port is fixed to one side of the middle part of the mounting plate by an extension plate, and the lower air port is disposed between two conveyor belts.

[0015] Preferably, an installation sleeve is provided on the extension plate on the other side of the top of the installation plate, and an air inlet is installed on the installation sleeve. The air inlet is located on one side of the conveyor belt, and both the air outlet and the air outlet are connected to an external air supply pipeline.

[0016] Beneficial effects

[0017] This invention provides a pre-sorting device for grading wild melon fruits. Compared with the prior art, it has the following advantages:

[0018] 1. The wild melon fruit grading and pre-sorting device uses a composite force field design that lifts the fruit by air jetting upward from the lower air inlet and pushes the fruit by air jetting horizontally from the upper air inlet. This design ensures that the fruit's trajectory is determined solely by its weight, eliminating shape interference and achieving precise grading. This orthogonal airflow design can significantly improve the sorting accuracy, which is significantly better than the single airflow sorting of existing patents.

[0019] 2. This wild melon fruit grading and pre-sorting device uses a tensioning mechanism that uses a spring to drive a dovetail slider and a clamping gear to automatically compensate for the slack in the conveyor belt caused by long-term operation. This eliminates the need for frequent manual adjustments. When the conveyor belt expands due to heat or wears and stretches, the spring compression automatically increases, and the clamping gear continuously applies constant pressure to ensure that the conveyor belt and the transmission gear are always tightly meshed, preventing slippage or deviation, reducing downtime for maintenance, and ensuring uniform fruit conveying speed, thus improving sorting efficiency. In addition, the cleaning liquid in the sorting tank not only buffers the impact of falling fruits but also simultaneously performs preliminary cleaning of the fruit surface, simplifying subsequent processing procedures. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model from the back.

[0022] Figure 3 This is a schematic diagram of the conveying mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram of the tensioning mechanism of this utility model.

[0024] Figure 5 This is a schematic diagram of the gas separation mechanism of this utility model.

[0025] In the diagram: Frame 1, Separation tank 11, Support 12, Conveying mechanism 2, Motor 21, Transmission gear 22, Baffle 23, Conveyor belt 24, Tooth groove 25, Tensioning mechanism 3, Fixed plate 31, Dovetail slide 32, Dovetail slider 33, Spring 34, Movable plate 35, Pressing gear 36, Air separation mechanism 4, Mounting plate 41, Lower air port 42, Mounting sleeve 43, Upper air port 44. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides two technical solutions:

[0028] First embodiment: A wild melon fruit grading and pre-selection device includes a frame 1, a conveying mechanism 2, a tensioning mechanism 3 and an air separation mechanism 4. Multiple sorting pools 11 are evenly distributed in the middle of the upper surface of the frame 1. The sorting pools 11 are filled with a cleaning liquid, which can pre-clean the fruit on the one hand, and buffer the fruit on the other hand to prevent the fruit from falling and being damaged. Supports 12 are fixed at the four corners of the upper surface of the frame 1 for connecting the conveying mechanism 2.

[0029] Specifically, the conveying mechanism 2 is mounted on the bracket 12 on the frame 1. The conveying mechanism 2 is used to convey the wild melon fruit. The conveying mechanism 2 includes a motor 21 fixed on one of the brackets 12. A transmission rod is set between two adjacent brackets 12. The output end of the motor 21 is connected to one of the transmission rods. Two transmission gears 22 are set at one end of the transmission rod. A baffle 23 is fixed on one side of the transmission gear 22. The baffle 23 is used to limit the conveyor belt 24 so that the conveyor belt 24 will not loosen when rotating. The conveyor belt 24 is set between the two transmission gears 22 that are far apart. The two conveyor belts 24 work together to convey the wild melon fruit. The inner side of the conveyor belt 24 is provided with a toothed groove 25. The toothed groove 25 meshes with the transmission gear 22. The distance between the two conveyor belts 24 can be adjusted appropriately according to the width of the fruit. The adjustment is made by changing the distance between the two parallel gears.

[0030] More specifically, the tensioning mechanism 3 is installed on the frame 1 and is connected to the conveying mechanism 2 to keep the conveying mechanism 2 in a taut state. The tensioning mechanism 3 includes a fixed plate 31 fixed to the middle of one side of the upper surface of the frame 1. A dovetail groove 32 is provided in the middle of one side of the fixed plate 31. A dovetail slider 33 is provided in the upper inner cavity of the dovetail groove 32. The bottom end of the dovetail slider 33 is connected to the lower inner wall of the dovetail groove 32 through a spring 34. A movable plate 35 is fixed to the outside of the dovetail slider 33. Two clamping gears 36 are connected to the middle of the outside of the movable plate 35 through a connecting shaft. The two clamping gears 36 respectively mesh with the toothed grooves 25 on the two conveyor belts 24. The spring 34 enables the clamping gears 36 to drive the lower part of the conveyor belt 24 to move downward, so that the conveyor belt 24 is kept taut on the transmission gear 22.

[0031] The second embodiment differs from the first embodiment in that: multiple air separation mechanisms 4 are provided, all of which are mounted on the frame 1. Each air separation mechanism 4 corresponds to a sorting tank 11 and is used to sort the fruits on the conveyor mechanism 2 into different sorting tanks 11 according to their weight. Each air separation mechanism 4 includes a mounting plate 41 fixed to one side of the upper surface of the frame 1. A lower air inlet 42 is fixed to one side of the middle portion of the mounting plate 41 via an extension plate. The lower air inlet 42 is located between two conveyor belts 24. The other side of the top of the mounting plate 41 has an extension plate... An installation sleeve 43 is provided on the extension plate, and an upper air inlet 44 is installed on the installation sleeve 43. The upper air inlet 44 is located on one side of the conveyor belt 24. Both the lower air inlet 42 and the upper air inlet 44 are connected to the external air supply pipe. The lower air inlet 42 is used to blow the fruit between the two conveyor belts 24 upward, and the upper air inlet 44 is used to blow the fruit out of the conveyor belt 24, so that the fruit falls into the corresponding sorting pool 11. The airflow directions of the lower air inlet 42 and the upper air inlet 44 are perpendicular to each other, forming a composite force field, so that the trajectory of the fruit is only related to its weight, eliminating the interference of the fruit shape.

[0032] When the device is in operation, the motor 21 drives the transmission rod to rotate, which in turn drives the transmission gears 22 at both ends to rotate. The transmission gears 22 mesh with the teeth on the inner side of the conveyor belts 24 through the tooth grooves 25, so that the two conveyor belts 24 run synchronously. The fruit is placed between the two conveyor belts 24 and is conveyed forward with the conveyor belts 24. The dovetail slider 33 of the tensioning mechanism 3 moves downward in the dovetail groove 32 under the elastic force of the spring 34, which drives the pressing gear 36 on the outer side of the movable plate 35 to press against the inner tooth groove 25 of the conveyor belt 24. When the conveyor belt 24 loosens due to long-term operation, the compression of the spring 34 increases, and the pressing gear 36 applies greater pressure to automatically compensate for the looseness of the conveyor belt 24, keeping the conveyor belt 24 in a taut state at all times and preventing slippage or deviation. The lower air port 42 of the air separation mechanism 4 is located between the two conveyor belts 24 and sprays air upward to slightly lift the fruit; the upper air port 44 on the same side sprays high-speed air in the horizontal direction, generating a lateral thrust on the fruit. The different air flow rates from the upper air inlet 44 and the lower air inlet 42 cause fruits of different weights to be affected by the different upper air inlets 44 and the lower air inlets 42, and fall into different sorting pools 11. The sorting pools 11 are filled with washing liquid, and the fruits are buffered by the liquid when they fall in, reducing mechanical damage.

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

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

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

Claims

1. A device for pre-sorting and grading fruits of Opuntia vulgaris Mill. characterized in that, include: The frame has multiple equally spaced sorting pools on the upper surface of the frame, the sorting pools are filled with cleaning liquid, and the frame is fixed at each of the four corners of the upper surface of the frame for connecting the conveying mechanism. A conveying mechanism, mounted on a support on a frame, is used to convey wild melon fruits; The tensioning mechanism is mounted on the frame and connected to the conveying mechanism to keep the conveying mechanism in a taut state. The gas separation mechanism includes multiple gas separation mechanisms, each mounted on a frame. Each gas separation mechanism corresponds to a sorting pool and is used to sort the fruits on the conveying mechanism into different sorting pools according to their weight.

2. The fruit grading and preselecting device according to claim 1, characterized in that: The conveying mechanism includes a motor fixed on one of the supports, a transmission rod is provided between two adjacent supports, and the output end of the motor is connected to one of the transmission rods.

3. The fruit grading and preselecting device according to claim 2, characterized in that: Two drive gears are arranged side by side at one end of the drive rod. A baffle is fixed on one side of each drive gear. A conveyor belt is arranged between the two drive gears that are far apart. The two conveyor belts work together to transport the wild melon fruit. The inner side of the conveyor belt is provided with toothed grooves that mesh with the drive gears.

4. The fruit grading and preselecting device according to claim 1, characterized in that: The tensioning mechanism includes a fixed plate fixed to the middle of one side of the upper surface of the frame. A dovetail groove is provided in the middle of one side of the fixed plate. A dovetail slider is provided in the upper inner cavity of the dovetail groove. The bottom end of the dovetail slider is connected to the lower inner wall of the dovetail groove by a spring. A movable plate is fixed to the outside of the dovetail slider. Two clamping gears are connected to the middle of the outside of the movable plate by a connecting shaft. The two clamping gears respectively mesh with the tooth grooves on the two conveyor belts.

5. The fruit grading and preselecting device according to claim 1, characterized in that: The gas separation mechanism includes a mounting plate fixed to one side of the upper surface of the frame, and a lower air port is fixed to one side of the middle part of the mounting plate through an extension plate. The lower air port is located between two conveyor belts.

6. The fruit grading and preselecting device according to claim 5, characterized in that: An installation sleeve is provided on the extension plate on the other side of the top of the mounting plate. An air inlet is installed on the installation sleeve. The air inlet is located on one side of the conveyor belt. Both the air outlet and the air outlet are connected to an external air supply pipeline.

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