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] The present application relates to the technical field of blueberry screening, and particularly relates to a blueberry grading and fruit selecting device. BACKGROUND

[0002] Blueberries can be generally divided into special-grade fruits, first-grade fruits and second-grade fruits according to size and quality, which are also called A-grade fruits, B-grade fruits and C-grade fruits. After picking, the large and small fruits of blueberries are usually mixed together and need to be screened and graded.

[0003] In the existing blueberry screening and grading device, such as the blueberry screening machine for efficient screening disclosed in patent CN218691457U, three groups of screening plates are distributed along the longitudinal direction, the diameters of the holes in the three groups of screening plates are arranged in descending order from top to bottom, and the blueberries are screened by being dropped according to the diameters of the holes in the screening plates through vibration of the screening plates.

[0004] However, this screening method has a disadvantage: there is a large height difference between the three groups of screening plates, and the blueberries may be damaged or broken during the process of dropping layer by layer, even if the blueberries are not broken, the fruit powder on the surface of the blueberries will be damaged due to vibration, friction and other reasons, thereby affecting the quality of the blueberry fruits, and the blueberry fruit powder is a material with high nutritional value and generally needs to be preserved during production and processing. Therefore, the traditional blueberry screening method needs to be improved. SUMMARY

[0005] To solve the above technical problems, the present application discloses a blueberry grading and fruit selecting device, which comprises a rack, a plurality of screening belts, a plurality of first transmission shafts and at least one second transmission shaft, the plurality of first transmission shafts are arranged at one end of the rack, the second transmission shaft is arranged at the other end of the rack, the two ends of the plurality of screening belts are respectively arranged around the plurality of first transmission shafts and the second transmission shaft, and the bottom surface and the top surface of the adjacent two screening belts are attached to each other, a plurality of screen holes are arranged on each of the plurality of screening belts, 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 the adjacent two screening belts are arranged one by one.

[0006] Further, the other end of the rack is provided with a plurality of second transmission shafts, the number of the second transmission shafts is the same as the number of the first transmission shafts, and the two ends of each of the screening belts are respectively arranged around each of the first transmission shafts and each of the second transmission shafts.

[0007] Further, a synchronous mechanism is arranged at the position adjacent to the screening belt on the rack, the synchronous mechanism comprises a transmission wheel, a transmission unit and a plurality of positioning components arranged on the transmission unit, the transmission unit is arranged around the transmission wheel, and the transmission unit is synchronously operated with the plurality of screening belts.

[0008] Further, the positioning assembly comprises a positioning sleeve, a positioning column, a first roller and a second roller, the positioning sleeve is fixedly arranged on the transmission unit, the positioning column is movably arranged in the positioning sleeve and movably penetrates through the transmission unit, the first roller is rotatably arranged at the lower end of the positioning column, and the second roller is arranged at the side of the positioning column and located above the first roller.

[0009] Further, the first guide plate is internally provided with a first slope which is downwardly inclined, and the first roller can roll to the upper side of the first guide plate through the first slope.

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

[0011] Further, the end of the first guide plate is provided with a third slope which is downwardly inclined, the end of the third slope is horizontally provided with a third guide plate, the upper side of the third guide plate is provided with a fourth guide plate which is matched with the rolling of the second roller, and the end of the fourth guide plate is provided with an arc-shaped plate which is matched with the turning radius of the second roller.

[0012] Further, the edge position of each of the screening belts is provided with a plurality of positioning holes which are matched with the positioning column.

[0013] Further, the inner side of the innermost screening belt is further provided with a non-hole belt, and the two ends of the non-hole belt are respectively arranged around the first transmission shaft and the second transmission shaft.

[0014] Further, the starting position of the synchronization mechanism on the rack is further provided with a limiting mechanism, the limiting mechanism comprises a supporting rod, a pressing wheel, a pressing wheel support and a guide rod, the supporting rod is horizontally arranged above the rack, the pressing wheel and the pressing wheel support are arranged at the two ends of the supporting rod through the guide rod and above the screening belt, the circumferential surface of the pressing wheel is provided with an annular groove, and the outer side of the guide rod is provided with a limiting spring.

[0015] Compared with the prior art, the blueberry grading and selecting equipment has the following beneficial effects: The blueberry grading and selecting equipment can screen the blueberries through the screen holes on the multiple screening belts, the adjacent screening belts are arranged in close contact, the height difference of the falling blueberries is extremely small, the quality of the screened and graded blueberries is improved, and the fruit powder on the fruit skin of the blueberries is effectively protected. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative labor.

[0017] Figure 1 The side structure schematic diagram of the embodiment one of the present application is shown in the figure. Figure 2 The top structure schematic diagram of the embodiment one of the present application is shown in the figure. Figure 3 The partial structure sectional view of the A in the figure. Figure 1 Figure 4 The side structure schematic diagram of the embodiment two of the present application is shown in the figure. Figure 5 The top structure schematic diagram of the embodiment two of the present application is shown in the figure. Figure 6 The partial structure side view of the synchronous mechanism in the embodiment two of the present application is shown in the figure. Figure 7 The partial structure sectional view of the positioning assembly in the embodiment two of the present application is shown in the figure. Figure 8 The partial structure enlarged view of the B in the figure. Figure 6 The partial structure enlarged view of the C in the figure. Figure 9 Figure 6 The partial structure schematic diagram of the limiting mechanism in the embodiment two of the present application is shown in the figure. Figure 10 The partial structure side view of the synchronous mechanism in the embodiment three of the present application is shown in the figure. Figure 11 The side structure schematic diagram of the embodiment four of the present application is shown in the figure. Figure 12 The side structure schematic diagram of the embodiment four of the present application is shown in the figure.

[0018] Reference signs: 1-frame, 2-screening belt, 21-screen hole, 22-positioning hole, 3-first transmission shaft, 4-second transmission shaft, 5-material receiving conveying belt, 6-tensioning roller, 7-hole-free belt, 8-synchronous mechanism, 81-transmission wheel, 82-transmission unit, 83-positioning assembly, 831-positioning sleeve, 832-positioning column, 833-first roller, 834-second roller, 84-first guide plate, 841-first slope, 842-third slope, 85-second guide plate, 851-second slope, 86-third guide plate, 87-fourth guide plate, 871-arc-shaped plate, 9-limiting mechanism, 91-supporting rod, 92-pressing wheel, 93-pressing wheel support, 94-guide rod, 95-annular groove, 96-limiting spring. ​​DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the 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 position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of these features.

[0022] In the description of the embodiments, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, connections through an intermediary medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention. Example 1

[0023] like Figures 1-2 As shown, the blueberry grading and sorting equipment in this embodiment includes a frame 1, multiple screening belts 2, multiple first transmission shafts 3 and a second transmission shaft 4. The multiple first transmission shafts 3 are arranged at one end of the frame 1 at intervals, and the second transmission shaft 4 is provided at the other end of the frame 1. The multiple screening belts 2 are respectively arranged at both ends to surround the multiple first transmission shafts 3 and the second transmission shaft 4, and the bottom surfaces and top surfaces of two adjacent screening belts 2 are in contact with each other, that is, there is almost no gap between the two adjacent screening belts 2 (or the gap is extremely small and negligible), which is conducive to reducing the height difference of the blueberries falling, reducing the damage to the blueberry fruits and the fruit powder on the skin, and thus improving the quality of the blueberries after screening and grading.

[0024] One of the multiple first transmission shafts 3 or second transmission shafts 4 can be selected as the drive shaft and driven by a motor. The screening belt 2 can be connected to the first transmission shaft 3 and the second transmission shaft 4 on both sides through a synchronous belt and a synchronous wheel. The above-mentioned driving and transmission methods all adopt conventional technical means in this field and will not be repeated here.

[0025] Each of the lower ends of the screening belts 2 is provided with a receiving conveyor belt 5, one part of which is located at the bottom of the screening belt 2, and the other part extends to the outside of the rack 1, so as to convey the screened blueberries out; the receiving conveyor belts 5 can be arranged on the same side of the rack 1, or on the opposite sides of the rack 1.

[0026] A plurality of sets of tensioning rollers 6 can be arranged at the bottom of the rack 1 according to the situation, and the plurality of screening belts 2 are arranged around the plurality of sets of tensioning rollers 6, so as to tighten the screening belts 2.

[0027] In addition, the inner side of the innermost screening belt 2 is also provided with a non-porous belt 7, and the two ends of the non-porous belt 7 are arranged around one of the first transmission shaft 3 and the second transmission shaft 4.

[0028] As shown in Figure 3 , a plurality of screening belts 2 are provided with a plurality of screen holes 21, the size of the screen holes 21 on the upper screening belt 2 is larger than the size of the screen holes 21 on the adjacent lower screening belt 2, and the screen holes 21 on the adjacent screening belts 2 are arranged one by one.

[0029] Large blueberries will not fall through any screen hole 21 and will eventually fall from the lower end of the upper screening belt 2 onto the receiving conveyor belt 5; medium-sized blueberries will fall through the uppermost screen hole 21 onto the second layer of screening belt 2 and will follow the second layer of screening belt 2 to fall from its lower end onto the receiving conveyor belt 5; small blueberries will fall through the second layer of screen holes 21 onto the third layer of screening belt 2 and will follow the third layer of screening belt 2 to fall from its lower end onto the receiving conveyor belt 5; and so on, to achieve the screening of blueberries of multiple grades. Among them, the receiving conveyor belt 5 can adopt a conventional belt conveyor in the art.

[0030] The shape of the screen hole 21 can be set as a circular hole or a regular polygonal hole, such as a square, a regular pentagon, a regular hexagon, a regular octagon, and the like.

[0031] Among them, the number of screening belts 2 can be reasonably set according to the required screening grade, if the blueberries need to be screened into three grades, two screening belts 2 and one non-porous belt 7 can be arranged; if the blueberries need to be screened into four grades, three screening belts 2 and one non-porous belt 7 can be arranged; and so on, so as to determine the number of screening belts 2. Example Two

[0032] As shown in Figures 4-5 , the other end of the rack 1 in this embodiment is provided with a plurality of second transmission shafts 4, the number of the second transmission shafts 4 is the same as that of the first transmission shafts 3, the two ends of each screening belt 2 are arranged around each first transmission shaft 3 and each second transmission shaft 4, and the diameters of the first transmission shafts 3 and the second transmission shafts 4 decrease from outside to inside, so as to ensure that the adjacent two screening belts 2 are in close contact with each other.

[0033] The rack 1 is provided with a synchronous mechanism 8 adjacent to the screening belt 2, and a limiting mechanism 9 is arranged at the starting position of the synchronous mechanism 8.

[0034] As shown in Figure 6 , the synchronous mechanism 8 comprises a transmission wheel 81, a transmission unit 82, and a plurality of positioning assemblies 83 arranged on the transmission unit 82. The transmission unit 82 is arranged around the transmission wheel, and the side edges of the plurality of screening belts 2 are in transmission connection with the transmission unit 82.

[0035] Among them, the transmission wheel 81 can adopt a chain wheel or a belt wheel, and the transmission unit 82 correspondingly adopts a chain or a belt. The transmission wheel 81 is coaxially provided with a roller shaft, the screening belt 2 is in transmission connection with the roller shaft, and the transmission wheel 81 can be in transmission connection with one of the first transmission shafts 3 through a chain wheel assembly or a belt wheel assembly.

[0036] As shown in Figure 7 , the positioning assembly 83 comprises a positioning sleeve 831, a positioning column 832, a first roller 833, and a second roller 834. The positioning sleeve 831 is fixedly arranged on the transmission unit 82, the positioning column 832 is movably arranged in the positioning sleeve 831 and movably penetrates through the transmission unit 82, the first roller 833 is rotatably arranged at the lower end of the positioning column 832, and the second roller 834 is arranged on one side of the positioning column 832 and located above the first roller 833. The edge positions of the screening belt 2 and the non-hole belt 7 are both provided with a plurality of positioning holes 22 matched with the positioning column 832.

[0037] As shown in Figures 8-9 , the first guiding plate 84 is arranged inside the synchronous mechanism 8, and the end of the first guiding plate 84 is provided with a first slope 841 inclined downward. The first roller 833 can roll to the upper side of the first guiding plate 84 through the first slope 841.

[0038] The end of the first guiding plate 84 is provided with a second guiding plate 85, and the end of the second guiding plate 85 is provided with a second slope 851 inclined upward. The second roller 834 can roll to the lower side of the second guiding plate 85 along the second slope 851.

[0039] The other structures in the embodiment can refer to the first embodiment, which will not be described here.

[0040] When the synchronous mechanism 8 operates synchronously with the screening belt 2 and the non-hole belt 7, the first roller 833 gradually rolls along the first slope 84, the first roller 833 and the positioning column 832 are gradually lifted, and after rolling to the upper side of the first slope 841, the first roller 833 always rolls along the first guiding plate 84.

[0041] In the process of lifting the positioning column 832, the positioning column 832 is gradually inserted into the positioning hole 22 of each layer of the screening belt 2 and the non-porous belt 7, so that the plurality of positioning holes 22 are aligned, thereby limiting the plurality of layers of the screening belt 2 and the non-porous belt 7, preventing the screening holes 21 from being misaligned due to different stretching ranges, slipping and other factors of the screening belt 2 and the non-porous belt 7 during operation. Once the screening holes 21 are misaligned, the blueberries cannot fall from the screening belt 2, and the grading and screening function cannot be realized.

[0042] When the first roller 833 rolls to the end of the first guide plate 84, the upper side of the second roller 834 abuts against the lower side of the second slope 851, and then is gradually pressed down by the second slope 851 as the second roller 834 rolls, so that the positioning column 832 is separated from the positioning hole 22.

[0043] As shown in Figure 10 The limiting mechanism 9 includes a support rod 91, a compression wheel 92, a compression wheel support 93 and a guide rod 94. The support rod 91 spans above the rack 1. The compression wheel 92 and the compression wheel support 93 are arranged at both ends of the support rod 91 and above the screening belt 2 through the guide rod 94. The circumferential surface of the compression wheel 92 is provided with an annular groove 95 for accommodating the positioning column 832. The guide rod 94 is provided with a limiting spring 96 on the outside, and the upper and lower ends of the limiting spring 96 abut against the bottom of the support rod 91 and the top of the compression wheel support 93, respectively, so as to press the compression wheel 92 against the surface of the screening belt 2.

[0044] In the process of inserting the positioning column 832 into the positioning hole 22, the compression wheel 92 rolls on the surface of the screening belt 2, which presses the screening belt 2, preventing the positioning column 832 from lifting the screening belt 2 upward and affecting the positioning column 832 from entering the positioning hole 22. Embodiment Three

[0045] As shown in Figure 11 In this embodiment, the end of the first guide plate 84 is provided with a third slope 842 inclined downward, the end of the third slope 842 is provided with a third guide plate 86 horizontally, the upper side of the third guide plate 86 is provided with a fourth guide plate 87 matched with the rolling of the second roller 834, and the end of the fourth guide plate 87 is provided with an arc-shaped plate 871 matched with the turning radius of the second roller 834.

[0046] When the positioning assembly 83 operates to the end of the first guide plate 84, the first roller 833 rolls along the third slope 842 to the third guide plate 86 under the action of gravity, and the positioning column 832 is separated from the positioning hole 22, and then the second roller 834 rolls along the lower side of the fourth guide plate 87; when the positioning assembly 83 operates to the turning position, the second roller 834 rolls along the arc-shaped plate 871 to the lower side. Embodiment Four

[0047] As shown in Figure 12As shown, the synchronization mechanism 8 in the embodiment is arranged above the non-porous belt 7 and the screening belt 2, synchronously positions the non-porous belt 7 and the screening belt 2 from the top of the screening belt 2, and the synchronization mechanism 8 is synchronously driven with the first transmission shaft 3 through a synchronization belt assembly or a chain wheel assembly.

[0048] Other structures in the embodiment can refer to embodiment two, which will not be repeated here.

[0049] In summary, the core of the present application is to arrange the adjacent screening belts 2 in close contact, and the size of the screen holes 21 decreases from top to bottom, thereby realizing the step-by-step screening of blueberries. Since the height difference of the blueberries falling is very small, the difference of each layer is equivalent to the thickness of the screening belt 2, which can effectively protect the blueberry fruit and the fruit powder on the skin, thereby improving the quality of the screened blueberries.

[0050] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled personnel in the art; when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

Claims

1. A blueberry grading and sorting device, characterized by: It includes a frame, multiple screening belts, multiple first transmission shafts and at least one second transmission shaft, multiple first transmission shafts are arranged at one end of the frame at intervals, and the second transmission shaft is set at the other end of the frame. The two ends of the multiple screening belts are respectively surrounded by the multiple first transmission shafts and the second transmission shafts, and the bottom surface and the top surface of two adjacent screening belts are in contact with each other. Multiple screening belts are provided with a number 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 the two adjacent screening belts are set in one-to-one correspondence.

2. The blueberry grading and sorting equipment according to claim 1, characterized in that: A plurality of second transmission shafts are provided at the other end of the frame, and the number of the second transmission shafts is the same as the number of the first transmission shafts. Both ends of each screening belt are respectively arranged around each first transmission shaft and each second transmission 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 at a position adjacent to the screening belt. The synchronization mechanism includes a transmission wheel, a transmission unit and several positioning components arranged 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 assembly includes a positioning sleeve, a positioning column, a first roller and a second roller. The positioning sleeve is fixedly arranged on the transmission unit. The positioning column is movably arranged in the positioning sleeve and moves through the transmission unit. The first roller is rotatably arranged at the lower end of the positioning column. The second roller is arranged on one side of the positioning column and is located on the upper side of the first roller.

5. The blueberry grading and sorting equipment according to claim 4, characterized in that: A first guide plate is provided inside the synchronization mechanism, and a first slope inclined downward is provided at the end of the first guide plate. The first roller can roll to the upper side of the first guide plate via the first slope.

6. The blueberry grading and sorting equipment according to claim 5, characterized in that: A second guide plate is provided at the end of the first guide plate, and an upwardly inclined second slope is provided at the end of the second guide plate, and the second roller can roll to the lower side of the second guide plate along the second slope.

7. The blueberry grading and sorting equipment according to claim 5, characterized in that: A third slope sloping downward is provided at the end of the first guide plate, a third guide plate is horizontally provided at the end of the third slope, a fourth guide plate is provided on the upper side of the third guide plate for rolling cooperation with the second roller, and an arc plate is provided at the end of the fourth guide plate for matching the turning radius of the second roller.

8. The blueberry grading and sorting equipment according to claim 4, characterized in that: A plurality of positioning holes cooperating with the positioning posts are provided at intervals on the edge of each screening belt.

9. The blueberry grading and sorting equipment according to claim 3, characterized in that: A non-porous belt is further provided on the inner side of the innermost screening belt, and both ends of the non-porous belt are respectively arranged around the first transmission shaft and the second transmission 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, and the limiting mechanism includes a support rod, a pressure wheel, a pressure wheel bracket and a guide rod. The support rod spans above the frame, and the pressure wheel and the pressure wheel bracket are arranged at both ends of the support rod through the guide rod and are located above the screening belt. An annular groove is provided on the circumferential surface of the pressure wheel, and a limiting spring is provided on the outer side of the guide rod.

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