Blueberry grading and sorting equipment

Abstract

The blueberry grading and sorting equipment comprises a rack, a plurality of screening belts, a plurality of first transmission shafts and at least one second transmission shaft, the first transmission shafts are arranged at one end of the rack at intervals, and the second transmission shafts are arranged at the other end of the rack; the two ends of the multiple screening belts are arranged around the multiple first transmission shafts and the multiple second transmission shafts correspondingly, the bottom faces and the top faces of every two adjacent screening belts are attached to each other, a plurality of screening holes are formed in the multiple screening belts, and the size of the screening holes in the upper screening belt is larger than that of the screening holes in the adjacent lower screening belt. The screening holes in every two adjacent screening belts are formed in a one-to-one correspondence mode. According to the blueberry grading and sorting equipment, blueberries are screened step by step through the screening holes in the multiple screening belts, the adjacent screening belts are arranged in an attached mode, the falling height difference of the blueberries is extremely small, the blueberry fruits and fruit powder on the peels of the blueberry fruits can be effectively protected, and the quality of the screened and graded blueberries is improved.

Description

Technical Field

[0001] This invention relates to the field of blueberry screening technology, and in particular to a blueberry grading and sorting device. Background Technology

[0002] Blueberries are generally classified into three grades based on size and quality: Premium, Grade 1, and Grade 2, also known as Grade A, Grade B, and Grade C. After harvesting, blueberries of different sizes are usually mixed together and need to be sorted and graded accordingly.

[0003] Among existing blueberry screening and grading equipment, such as the high-efficiency blueberry screening machine disclosed in patent CN218691457U, blueberries are screened by three sets of sieve plates distributed longitudinally at intervals. The diameter of the holes on the three sets of sieve plates is arranged in descending order from top to bottom. The vibration of the sieve plates causes the blueberries to fall in sequence according to the diameter of the holes on the sieve plates, thereby achieving the screening of blueberries.

[0004] However, this screening method has a drawback: there is a large height difference between the three sets of sieve plates. Blueberries may be injured or broken as they fall layer by layer. Even if the blueberries are not broken, the bloom on the blueberry skin will be damaged by vibration and friction, which will affect the quality of the blueberry fruit. Blueberry bloom is a substance with high nutritional value and generally needs to be retained during production and processing. Therefore, this traditional blueberry screening method needs to be improved. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention discloses a blueberry grading and sorting device, including a frame, multiple screening belts, multiple first drive shafts, and at least one second drive shaft. The multiple first drive shafts are arranged at intervals at one end of the frame, and the second drive shaft is disposed at the other end of the frame. The two ends of the multiple screening belts are respectively arranged around the multiple first drive shafts and the multiple second drive shafts, and the bottom and top surfaces of two adjacent screening belts are in contact with each other. Each of the multiple screening belts is provided with a plurality of sieve holes. The size of the sieve holes on the upper screening belt is larger than the size of the sieve holes on the adjacent lower screening belt, and the sieve holes on two adjacent screening belts are arranged in a one-to-one correspondence.

[0006] Furthermore, the other end of the frame is provided with a plurality of second drive shafts, the number of which is the same as the number of first drive shafts, and the two ends of each screening belt are respectively arranged around each first drive shaft and each second drive shaft.

[0007] Furthermore, a synchronization mechanism is provided on the frame adjacent to the screening belt. The synchronization mechanism includes a transmission wheel, a transmission unit, and several positioning components disposed on the transmission unit. The transmission unit is arranged around the transmission wheel and operates synchronously with multiple screening belts.

[0008] Furthermore, the positioning component includes a positioning sleeve, a positioning post, a first roller, and a second roller. The positioning sleeve is fixedly mounted on the transmission unit, the positioning post is movably mounted inside the positioning sleeve and movably passes through the transmission unit, the first roller is rotatably mounted at the lower end of the positioning post, and the second roller is mounted on one side of the positioning post and located above the first roller.

[0009] Furthermore, the synchronization mechanism is provided with a first guide plate inside, and the end of the first guide plate is provided with a downwardly inclined first ramp, through which the first roller can roll to the upper side of the first guide plate.

[0010] Furthermore, a second guide plate is provided at the end of the first guide plate, and the end of the second guide plate is provided with an upwardly inclined second slope, and the second roller can roll along the second slope to the lower side of the second guide plate.

[0011] Furthermore, the first guide plate has a downward-sloping third ramp at its end, and a third guide plate is horizontally positioned at the end of the third ramp. A fourth guide plate is positioned on the upper side of the third guide plate to cooperate with the second roller in rolling motion, and an arc-shaped plate matching the turning radius of the second roller is positioned at the end of the fourth guide plate.

[0012] Furthermore, each of the screening strips has several positioning holes spaced apart at its edge to mate with the positioning posts.

[0013] Furthermore, the innermost screening belt is provided with a non-perforated belt on its inner side, and the two ends of the non-perforated belt are respectively arranged around the first drive shaft and the second drive shaft.

[0014] Furthermore, a limiting mechanism is also provided on the frame at the starting position of the synchronization mechanism. The limiting mechanism includes a support rod, a pressure roller, a pressure roller bracket, and a guide rod. The support rod spans across the top of the frame. The pressure roller and the pressure roller bracket are set at both ends of the support rod and above the screening belt through the guide rod. An annular groove is provided on the circumferential surface of the pressure roller. A limiting spring is sleeved on the outer side of the guide rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The blueberry grading and sorting equipment of the present invention sorts blueberries step by step through the sieve holes on multiple screening belts. The adjacent screening belts are set in close contact, and the height difference of the blueberries falling is minimal, which can effectively protect the blueberry fruit and the bloom on its skin, thereby improving the quality of the blueberries after screening and grading. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a side view of Embodiment 1 of the present invention; Figure 2 This is a top view of the structure of Embodiment 1 of the present invention; Figure 3 for Figure 1 A partial structural cross-sectional view at point A in the middle; Figure 4 This is a side view of Embodiment 2 of the present invention; Figure 5 This is a top view of the structure of Embodiment 2 of the present invention; Figure 6 This is a partial structural side view of the synchronization mechanism in Embodiment 2 of the present invention; Figure 7 This is a partial structural cross-sectional view of the positioning component in Embodiment 2 of the present invention; Figure 8 for Figure 6 Enlarged view of the local structure at point B; Figure 9 for Figure 6 Enlarged view of the local structure at point C; Figure 10 This is a partial structural diagram of the limiting mechanism in Embodiment 2 of the present invention; Figure 11 This is a partial structural side view of the synchronization mechanism in Embodiment 3 of the present invention; Figure 12 This is a side view of Embodiment 4 of the present invention.

[0018] Figure label: 1-Frame, 2-Screening belt, 21-Screen holes, 22-Positioning holes, 3-First drive shaft, 4-Second drive shaft, 5-Receiving conveyor belt, 6-Tensioning roller, 7-Penetrating belt, 8-Synchronization mechanism, 81-Drive wheel, 82-Drive unit, 83-Positioning assembly, 831-Positioning sleeve, 832-Positioning column, 833-First roller, 834-Second roller, 84-First guide plate, 841-First ramp, 842-Third ramp, 85-Second guide plate, 851-Second ramp, 86-Third guide plate, 87-Fourth guide plate, 871-Arc plate, 9-Limiting mechanism, 91-Support rod, 92-Pressure roller, 93-Pressure roller bracket, 94-Guide rod, 95-Annular groove, 96-Limiting spring. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] In the description of the embodiments, unless otherwise explicitly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0023] like Figure 1-2 As shown, the blueberry grading and sorting device in this embodiment includes a frame 1, multiple screening belts 2, multiple first drive shafts 3, and a second drive shaft 4. The multiple first drive shafts 3 are arranged at intervals at one end of the frame 1, and the second drive shaft 4 is located at the other end of the frame 1. The two ends of the multiple screening belts 2 are respectively arranged around the multiple first drive shafts 3 and the second drive shaft 4, and the bottom and top surfaces of two adjacent screening belts 2 are in contact with each other, that is, there is almost no gap between two adjacent screening belts 2 (or the gap is extremely small and negligible). This helps to reduce the height difference of the blueberries falling, reduce the damage to the blueberry fruit and the bloom on its skin, and thus improve the quality of the blueberries after screening and grading.

[0024] Multiple first drive shafts 3 or second drive shafts 4 can be selected as drive shafts and driven by motors. The screening belt 2 can be connected to both sides of the first drive shaft 3 and the second drive shaft 4 by synchronous belts and synchronous pulleys. The above driving and transmission methods all adopt conventional technical means in this field, and will not be described in detail here.

[0025] Each screening belt 2 has a receiving conveyor belt 5 at its unloading end. Part of the receiving conveyor belt 5 is located at the bottom of the screening belt 2, and the other part extends to the outside of the frame 1, thereby conveying the screened blueberries out. The receiving conveyor belt 5 can be set on the same side of the frame 1, or they can be set at intervals on opposite sides of the frame 1.

[0026] Multiple sets of tension rollers 6 can be installed at the bottom of the frame 1 as needed, and multiple screening belts 2 are respectively arranged around the multiple sets of tension rollers 6, so as to tighten the screening belts 2.

[0027] In addition, the innermost screening belt 2 is provided with a non-perforated belt 7, and the two ends of the non-perforated belt 7 are respectively arranged around one of the first drive shafts 3 and the second drive shaft 4.

[0028] Both ends of the first drive shaft 3 and the second drive shaft 4 are provided with stepped shafts, and the diameter of the stepped shafts is larger than the diameter of the drive shafts. These are used to limit the screening belt 2 and the non-perforated belt 7 to prevent them from deviating.

[0029] like Figure 3 As shown, each of the multiple screening belts 2 has a number of sieve holes 21. The size of the sieve holes 21 on the upper screening belt 2 is larger than the size of the sieve holes 21 on the adjacent lower screening belt 2, and the sieve holes 21 on the adjacent screening belts 2 are all set in a one-to-one correspondence.

[0030] Large blueberries will not fall through any of the sieve holes 21 and will eventually fall onto the receiving conveyor belt 5 from its lower end along with the upper screening belt 2; medium blueberries will fall through the uppermost sieve hole 21 onto the second screening belt 2 and will fall onto the receiving conveyor belt 5 from its lower end along with the second screening belt 2; small blueberries will fall through the second sieve hole 21 onto the third screening belt 2 and will fall onto the receiving conveyor belt 5 from its lower end along with the third screening belt 2; and so on, achieving multiple grades of blueberry screening. The receiving conveyor belt 5 can be a conventional belt conveyor in this field.

[0031] The shape of the sieve hole 21 can be set as a round hole or a regular polygonal hole, such as a square, a regular pentagon, a regular hexagon, a regular octagon, etc.

[0032] The number of screening bands 2 can be set reasonably according to the required screening level. If blueberries need to be screened into three levels, two screening bands 2 and one non-perforated band 7 can be set; if blueberries need to be screened into four levels, three screening bands 2 and one non-perforated band 7 can be set; and so on, the number of screening bands 2 can be determined. Example 2

[0033] like Figure 4-5As shown, in this embodiment, the other end of the frame 1 is provided with a plurality of second drive shafts 4. The number of second drive shafts 4 is the same as the number of first drive shafts 3. The two ends of each screening belt 2 are respectively arranged around each first drive shaft 3 and each second drive shaft 4, and the shaft diameters of the first drive shaft 3 and the second drive shaft 4 decrease from the outside to the inside to ensure that the two adjacent screening belts 2 fit together.

[0034] A synchronization mechanism 8 is provided on the frame 1 adjacent to the screening belt 2, and a limiting mechanism 9 is also provided on the frame 1 at the starting position of the synchronization mechanism 8.

[0035] like Figure 6 As shown, the synchronization mechanism 8 includes a transmission wheel 81, a transmission unit 82, and several positioning components 83 disposed on the transmission unit 82. The transmission unit 82 is arranged around the transmission wheel, and the sides of the multiple screening belts 2 are connected to the transmission unit 82 for transmission.

[0036] The drive wheel 81 can be a sprocket or a pulley, and the drive unit 82 can be a chain or a belt. The drive wheel 81 is coaxially equipped with a roller shaft, and the screening belt 2 is connected to the roller shaft. The drive wheel 81 can be connected to one of the first drive shafts 3 through a sprocket assembly or a pulley assembly.

[0037] like Figure 7 As shown, the positioning component 83 includes a positioning sleeve 831, a positioning post 832, a first roller 833, and a second roller 834. The positioning sleeve 831 is fixedly mounted on the transmission unit 82. The positioning post 832 is movably mounted inside the positioning sleeve 831 and movably passes through the transmission unit 82. The first roller 833 is rotatably mounted at the lower end of the positioning post 832. The second roller 834 is mounted on one side of the positioning post 832 and located above the first roller 833. The edges of the screening belt 2 and the non-perforated belt 7 are provided with a plurality of positioning holes 22 that cooperate with the positioning post 832.

[0038] like Figure 8-9 As shown, the synchronization mechanism 8 has a first guide plate 84 inside, and the end of the first guide plate 84 has a downwardly inclined first ramp 841. The first roller 833 can roll to the upper side of the first guide plate 84 via the first ramp 841.

[0039] The first guide plate 84 has a second guide plate 85 at its end, and the second guide plate 85 has an upwardly inclined second ramp 851 at its end. The second roller 834 can roll along the second ramp 851 to the lower side of the second guide plate 85.

[0040] Other structures in this embodiment can be referred to in Embodiment 1, and will not be repeated here.

[0041] When the synchronizing mechanism 8 operates synchronously with the screening belt 2 and the non-perforated belt 7, the first roller 833 gradually rolls upward along the first slope 84, and the first roller 833 and the positioning post 832 are gradually raised until they roll to the upper side of the first slope 841, after which the first roller 833 begins to roll along the first guide plate 84.

[0042] As the positioning column 832 is raised, it is gradually inserted into the positioning holes 22 of each layer of screening belt 2 and non-perforated belt 7, so that multiple positioning holes 22 are aligned, thereby achieving the limiting of multiple layers of screening belt 2 and non-perforated belt 7. This prevents the screening belt 2 and non-perforated belt 7 from misaligning due to different stretching amplitudes or slippage during operation. Once the screening holes 21 are misaligned, blueberries cannot fall from the screening belt 2, and thus the grading and screening function cannot be achieved.

[0043] When the first roller 833 rolls to the end of the first guide plate 84, the upper side of the second roller 834 comes into contact with the lower side of the second ramp 851. Then, as the second roller 834 rolls, it is gradually pressed down by the second ramp 851, causing the positioning post 832 to disengage from the positioning hole 22.

[0044] like Figure 10 As shown, the limiting mechanism 9 includes a support rod 91, a pressure roller 92, a pressure roller bracket 93, and a guide rod 94. The support rod 91 spans across the frame 1. The pressure roller 92 and the pressure roller bracket 93 are set at both ends of the support rod 91 and above the screening belt 2 via the guide rod 94. The circumferential surface of the pressure roller 92 is provided with an annular groove 95 to accommodate the passage of the positioning post 832. A limiting spring 96 is sleeved on the outside of the guide rod 94. The upper and lower ends of the limiting spring 96 abut against the bottom of the support rod 91 and the top of the pressure roller bracket 93, respectively, thereby pressing the pressure roller 92 onto the surface of the screening belt 2.

[0045] During the process of the positioning post 832 being inserted into the positioning hole 22, the pressure roller 92 rolls on the surface of the screening belt 2, pressing the screening belt 2 to prevent the positioning post 832 from pushing the screening belt 2 upward and affecting the positioning post 832 from entering the positioning hole 22. Example 3

[0046] like Figure 11 As shown, in this embodiment, the end of the first guide plate 84 is provided with a downwardly inclined third slope 842, the end of the third slope 842 is provided with a horizontal third guide plate 86, the upper side of the third guide plate 86 is provided with a fourth guide plate 87 that rolls with the second roller 834, and the end of the fourth guide plate 87 is provided with an arc plate 871 that matches the turning radius of the second roller 834.

[0047] When the positioning component 83 moves to the end of the first guide plate 84, the first roller 833 rolls along the third slope 842 onto the third guide plate 86 under its own weight, and at the same time the positioning post 832 disengages from the positioning hole 22. Then the second roller 834 rolls along the lower side of the fourth guide plate 87. When the positioning component 83 moves to the turning point, the second roller 834 rolls along the arc plate 871 to the lower side. Example 4

[0048] like Figure 12 As shown, in this embodiment, the synchronization mechanism 8 is disposed above the non-perforated belt 7 and the screening belt 2, and synchronously positions the non-perforated belt 7 and the screening belt 2 from the top of the screening belt 2. The synchronization mechanism 8 is synchronously connected to the first drive shaft 3 therein through a synchronization belt assembly or a sprocket assembly.

[0049] Other structures in this embodiment can be referred to in Embodiment 2, and will not be repeated here.

[0050] In summary, the core of this invention is to fit adjacent screening belts 2 together, with the size of the sieve holes 21 decreasing sequentially from top to bottom, thereby achieving step-by-step screening of blueberries. Since the height difference of the falling blueberries is extremely small, the drop difference of each layer is equivalent to the thickness of the screening belt 2, which effectively protects the blueberries and the bloom on their skin, thus improving the quality of the blueberries after screening and grading.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by the present invention.

Claims

1. A blueberry grading and sorting device, characterized in that: The device includes a frame, multiple screening belts, multiple first drive shafts, and at least one second drive shaft. The multiple first drive shafts are spaced apart at one end of the frame, and the second drive shaft is located at the other end of the frame. The two ends of the multiple screening belts are respectively arranged around the multiple first drive shafts and the second drive shaft, and the bottom and top surfaces of two adjacent screening belts are in contact with each other. Each screening belt is provided with a number of screen holes. The size of the screen holes on the upper screening belt is larger than the size of the screen holes on the adjacent lower screening belt, and the screen holes on two adjacent screening belts are arranged in a one-to-one correspondence.

2. The blueberry grading and sorting equipment according to claim 1, characterized in that: The other end of the frame is provided with a plurality of second drive shafts, the number of which is the same as the number of first drive shafts, and the two ends of each screening belt are respectively arranged around each first drive shaft and each second drive shaft.

3. The blueberry grading and sorting equipment according to claim 1 or 2, characterized in that: A synchronization mechanism is provided on the frame adjacent to the screening belt. The synchronization mechanism includes a transmission wheel, a transmission unit, and several positioning components disposed on the transmission unit. The transmission unit is arranged around the transmission wheel and operates synchronously with multiple screening belts.

4. The blueberry grading and sorting equipment according to claim 3, characterized in that: The positioning component includes a positioning sleeve, a positioning post, a first roller, and a second roller. The positioning sleeve is fixedly mounted on the transmission unit. The positioning post is movably mounted inside the positioning sleeve and movably passes through the transmission unit. The first roller is rotatably mounted at the lower end of the positioning post, and the second roller is mounted on one side of the positioning post and located above the first roller.

5. The blueberry grading and sorting equipment according to claim 4, characterized in that: The synchronization mechanism has a first guide plate inside, and the end of the first guide plate has a downward inclined first ramp, through which the first roller can roll to the upper side of the first guide plate.

6. The blueberry grading and sorting equipment according to claim 5, characterized in that: The first guide plate has a second guide plate at its end, and the end of the second guide plate has an upwardly inclined second ramp, and the second roller can roll along the second ramp to the underside of the second guide plate.

7. The blueberry grading and sorting equipment according to claim 5, characterized in that: The first guide plate has a downward-sloping third ramp at its end, and a third guide plate is horizontally positioned at the end of the third ramp. A fourth guide plate is positioned on the upper side of the third guide plate to cooperate with the rolling of the second roller. The end of the fourth guide plate is provided with an arc-shaped plate that matches the turning radius of the second roller.

8. The blueberry grading and sorting equipment according to claim 4, characterized in that: Each of the screening strips has several positioning holes spaced apart at its edge to mate with the positioning posts.

9. The blueberry grading and sorting equipment according to claim 3, characterized in that: The innermost screening belt is also provided with a non-perforated belt, and the two ends of the non-perforated belt are respectively arranged around the first drive shaft and the second drive shaft.

10. The blueberry grading and sorting equipment according to claim 4, characterized in that: A limiting mechanism is also provided on the frame at the starting position of the synchronization mechanism. The limiting mechanism includes a support rod, a pressure roller, a pressure roller bracket, and a guide rod. The support rod spans across the top of the frame. The pressure roller and pressure roller bracket are set at both ends of the support rod and above the screening belt through the guide rod. An annular groove is provided on the circumferential surface of the pressure roller. A limiting spring is sleeved on the outer side of the guide rod.

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