Spiral roller and pepper harvester

Abstract

The utility model discloses a spiral roller and a pepper harvester, the spiral roller comprises a roller body which forms a tube shell structure, one end of the roller body is a feeding end, the other end of the roller body is a discharging end, and a roller wall body at the lower part of the roller body is determined to form a net bottom so as to leak separated line pepper fruits; the spiral rotor is provided with a mandrel and a spiral installed on the mandrel, and the screw pitch of the front portion of the spiral is gradually increased from the feeding end to the discharging end, so that a variable-screw-pitch section is formed; the axis of the spiral rotor and the axis of the cylinder body are collinear, and the two ends of the spiral rotor are mounted on a preset rack through bearing seats; and the spiral roller motor is mounted on the rack and outputs and drives the spiral rotor. According to the spiral roller disclosed by the utility model, the feeding clamping stagnation is not easy to generate.

Description

Technical Field

[0001] This utility model relates to a spiral roller for harvesting chili peppers, and also to a chili pepper harvester equipped with the spiral roller. Background Technology

[0002] According to the industry standard JB / T 12825-2016, the fruit shape index refers to the ratio of fruit length to fruit diameter (diameter at the larger end), while long peppers are peppers with a fruit shape index greater than 8. Tomatoes are predominantly spherical, with a fruit shape index of around 1. In other words, tomato harvesters are suitable for harvesting round peppers but not for long peppers. This is because, during the harvesting of nearly spherical fruits such as tomatoes and round peppers, the separation of the fruit from the vine is achieved by the vibration of a vibrating roller at a given frequency during its rotation. The vibrating roller is covered with vibrating fingers (also known as spring teeth). These vibrating fingers propel the vine backward while simultaneously shaking the relatively heavier spherical fruit off the vine, thus separating the fruit from the vine.

[0003] Correspondingly, a bottom grid is provided below the vibrating roller. Under the support of the bottom grid and the agitation of the vibrating fingers, the vines are pushed onto the vine conveyor belt, while the fruits fall through the bottom grid onto the fruit conveyor belt. The bottom grid consists of several circular grid strips with an arc-shaped comb-like structure, fixed at one end and suspended at the other, serving to support the vines.

[0004] This structure, derived from tomato harvesters, can separate nearly spherical fruits such as tomatoes and round peppers. However, when harvesting linear peppers such as chili peppers, the linear peppers are difficult to separate from the vines because the fruits are similar in shape to the vines and the peppers themselves are relatively light. Increasing the vibration frequency and amplitude of the vibrator may lead to a higher rate of mechanical damage to the fruits. Therefore, the separation structure needs to be improved to adapt to the separation of linear peppers.

[0005] At the same time, relying solely on the combination of the vibrating roller and the bottom grid of the vibrator can only separate the relatively mature pepper fruits from the vines. In other words, a large number of pepper fruits will still remain after the vines pass through the vibrator station. Therefore, the vines need to enter the next station in order to fully separate the stringy peppers from the vines.

[0006] Currently, there exists an independently configured device for separating chili pepper fruits from vines: a spiral roller. This device effectively separates the fruits from the vines. Its principle is similar to a screw conveyor, but screw conveyors are typically used for conveying granular materials. Chili pepper plants are inherently difficult to transport using a screw conveyor. Therefore, the rotor of the spiral roller is usually made of a spiral steel pipe, which is used to feed the material towards the discharge end of the spiral roller. However, even with a screw conveyor, if the granular material is damp, it can easily cause blockages. Chili pepper vines themselves have poor flowability. Even with a relatively large pitch (generally over 4 meters) steel pipe spiral, it is relatively difficult for chili pepper plants to enter from the shaft end of the spiral roller. Furthermore, the feeding force of the chili pepper plants generates significant resistance, easily causing jamming at the front of the roller and leading to blockages. Utility Model Content

[0007] To address the problem of jamming and blockage that easily occurs when axially feeding materials into a chili harvester, this invention provides a spiral roller, and also provides a chili harvester equipped with the spiral roller.

[0008] According to a first aspect of the present invention, a spiral roller is provided, comprising:

[0009] The cylinder body forms a tubular structure, with one end being the feed end and the other end being the discharge end. The lower part of the cylinder wall forms a mesh bottom to allow the separated chili pepper fruits to fall through.

[0010] A helical rotor has a spindle and a helix mounted on the spindle. The pitch of the helix gradually increases from the feed end to the discharge end, forming a variable pitch section. The axis of the helical rotor is collinear with the axis of the cylinder, and both ends are mounted on a predetermined frame via bearing seats.

[0011] A spiral roller motor is mounted on the frame and outputs a drive to the spiral rotor.

[0012] Optionally, the cylinder has two parallel spiral rotors, with each rotor corresponding to one of the cylinders.

[0013] Optionally, it also includes a feed roller disposed on the front side of the feed end.

[0014] Optionally, the variable pitch section constitutes a leading helical blade, and the remaining helices are formed by a helical rod and a support rod for fixing the helical rod to a mandrel.

[0015] Optionally, the length of the leading helical blade is 10.5% to 14.2% of the axial length of the helix.

[0016] Optionally, the screw rod has triangular or U-shaped protrusions distributed on the centrifugal side of the screw.

[0017] Optionally, the height of the protrusion is one-seventh to one-fifth of the major diameter of the screw rod.

[0018] Optionally, the distribution density of the protrusions on the corresponding helical rod is 3 to 5 per meter, and the length of the helical rod in this distribution density is the dimension along the axial direction of the helical roller.

[0019] Optionally, the end of the leading helical blade is rounded, has a cylindrical lip, or is welded with a cylindrical protective rigid strip.

[0020] Optionally, the pitch of the leading helical blade at the front is 550mm~650mm, and the pitch at the rear is 1900mm~2300mm;

[0021] Correspondingly, the helix angle at the front of the leading helical blade is 73°~75°, and the helix angle at the rear is 40°~46°;

[0022] The pitch of the screw rod is 5750mm~6250mm, which is a constant pitch screw, and the helix angle of the screw rod is 12.2°~12.6°.

[0023] Optionally, the major diameter of the leading helical blade is larger than the major diameter of the screw rod, and the difference between the major diameters of the leading helical blade and the screw rod is one-sixth to one-third of the major diameter of the screw rod.

[0024] Optionally, the spiral is a three-ended spiral or a two-ended spiral.

[0025] Optionally, the portion with the mesh bottom and the rest of the cylinder body are separate parts, wherein the portion with the mesh bottom constitutes a fixed mesh bottom assembly, and the rest constitutes a cylinder cover;

[0026] Accordingly, the cylindrical cover has a hinge on one side and a fixing part on the other side, so that when the fixing part is released, the cylindrical cover can be lifted on one side with the hinge as the axis and can be disassembled.

[0027] Optionally, the shroud has multiple segments;

[0028] Accordingly, each segment has an independent fixing part.

[0029] Optionally, the fixing part is a snap-on fixing part.

[0030] According to a second aspect of the present invention, a chili harvester is provided, including the spiral roller described in the first aspect of the present invention.

[0031] According to the present invention, the spiral rotor of the spiral roller is configured such that the front part of the spiral is a variable pitch section, and the pitch of the variable pitch section gradually increases from the feed end to the discharge end, so that the material is not compacted when it is fed into the spiral roller, thereby effectively solving the problem of material getting stuck at the cylinder opening or causing blockage. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a spiral roller structure with a double spiral rotor in one embodiment. A spiral roller cover is omitted in the figure.

[0033] Figure 2 This is a schematic diagram of the three-dimensional structure of a helical rotor in one embodiment.

[0034] Figure 3 This is a schematic diagram of the right view of the helical rotor structure in one embodiment.

[0035] Figure 4 This is a schematic diagram of the mesh bottom unit structure in one embodiment.

[0036] Figure 5 This is a schematic diagram of the three-dimensional structure of the shroud unit in one embodiment.

[0037] Figure 6 This is a schematic diagram of the main structure of the cylindrical cover unit in one embodiment.

[0038] In the diagram: 1. Feed roller, 2. Inlet bearing housing, 3. End cover, 4. Spiral roller cover, 5. Buckle, 6. Outlet bearing housing, 7. Motor housing, 8. Double sprocket, 9. Spiral roller motor, 10. Spindle, 11. Spiral rod, 12. Protrusion, 13. Net bottom, 14. Fastening assembly, 15. Support rod, 16. Leading spiral blade, 17. Feed motor, 18. Inlet journal, 19. Protective round steel bar, 20. Reinforcing round steel bar, 21. Outlet journal, 22. Shaft head, 23. Keyway, 24. End plate, 25. Straight grid bar, 26. Arc grid bar, 27. Fixing plate, 28. Fixing hole, 29. Cover end plate, 30. Ear plate, 31. Rotating shaft, 32. Cover body, 33. Support plate. Detailed Implementation

[0039] As described in the background section, the spiral roller is derived from the spiral conveyor, but the material conveyed by the spiral roller on the chili harvester is the chili vine with chili peppers growing on it. It can be set up independently on the chili harvester or configured in the lower stage of the primary separation equipment to form a secondary separation equipment for separating the fruit and the vine.

[0040] It should be understood that screw conveying equipment, including screw conveyors, usually uses the feed end as the front end and the discharge end as the rear end to determine the front-to-back direction, which is also called the longitudinal or length direction.

[0041] Given a fixed length, the width is usually also determined; the width is also known as the left-right or transverse direction.

[0042] The spiral roller includes a cylinder body and a spiral rotor. The cylinder body is constructed as a shell structure. In the embodiment illustrated in this utility model, the cylinder body of the shell structure adopts an upper and lower split structure, but its inner contour is still preferably cylindrical.

[0043] exist Figure 1 In the illustrated structure, to clearly show the arrangement of the helical rotor within the cylinder, a helical roller cover 4 is omitted. Figure 1 The spiral roller shown is a dual-rotor spiral roller, but a single-rotor spiral roller can also be used.

[0044] The cylinder has a defined feed end, which corresponds to a feed inlet (referred to as the inlet), and a discharge end, which corresponds to a discharge outlet (referred to as the outlet). As mentioned earlier, the feed end is the front end, and the discharge end is the rear end.

[0045] It should also be understood that, for the spiral roller, the fruit and vine are separated during the spiral conveying process. The separated fruit falls through the grid holes of the lower net bottom 13. Below the net bottom 13, there is generally a fruit conveying device. Since this is not part of the improvements made in this utility model, other components of the chili harvester besides the spiral roller will not be described in detail here. The description provided here is mainly for distinguishing the axial orientation of the spiral roller. Regarding the chili fruit, it exits from the net bottom 13, but this does not affect the definition of the feed end and discharge end of the roller body.

[0046] Furthermore, the lower part of the cylinder wall is defined as the net bottom 13, so that the separated chili pepper fruits fall through while the fruit vines remain on the net bottom 13.

[0047] Figure 4 This is a structural schematic diagram of a mesh bottom unit. Since the axial length of the mesh bottom 13 is relatively large, it can be modularized to reduce the overall storage, transportation and assembly difficulty. Figure 4 In the middle, the bottom unit has an overall arc-shaped structure, more accurately called a cylindrical fan-shaped surface structure. The axis of this arc-shaped structure is collinear with the axis of the spiral rotor of the spiral roller when installed on the chili harvester.

[0048] Figure 4 In the middle, the main structure of the mesh bottom 13 is a grid structure, which is assembled by the straight grid bars 25 parallel to the axis of the spiral rotor and the arc grid bars 26 with the axis of the spiral rotor as the axis in the figure, arranged in a longitudinal and transverse manner.

[0049] The two ends of the arc grid strip 26 are equipped with fixing plates 27, and the two fixing plates 27 form the left and right frames. The two ends of the straight grid strip 25 are fitted with end plates to form the front and rear frames. The end plate 24 is a fan ring plate, and its inner edge is used to connect with the corresponding grid strip. Generally, the connection is made by welding.

[0050] The fixing plate 27 is a straight strip with several fixing holes 28 to facilitate fixing the mesh bottom 13 to the frame.

[0051] The fixing hole 28 can have an adjustment margin in the longitudinal direction, and is accordingly selected as an elongated hole extending in that direction.

[0052] Figure 2 and Figure 3 A spiral rotor is shown. Unlike conventional spiral conveyors, the spiral rotor used on spiral rollers for separating chili pepper fruits from vines has a relatively large helix angle. In the embodiments of this utility model, all or most of the spiral part used to construct the spiral rotor is constructed using a spiral rod 11. Obviously, the axis of the spiral rod 11 is the axis of the spiral rotor.

[0053] The mounting base for the spiral is a mandrel 10, and both ends of the mandrel 10 are mounted on a predetermined frame via bearing seats. Figure 1 The frame is not shown in the illustrated structure. Since feeding and discharging need to be achieved axially on the screw rotor, for example, the inlet bearing housing 2 typically requires connection via two or three radial rods. The material enters the cylinder through the fan-shaped space between the radial rods. The same applies to the outlet bearing housing 6, which will not be elaborated further here.

[0054] In other embodiments, the mandrel 10 can be extended to allow for the opening of the inlet and outlet positions, thus eliminating the need for radial rods to connect and support the corresponding bearing seats, for example... Figure 2 In the middle, the tail end of the screw rod 11 is a distance from the outlet end journal 21 used to install the bearing, which is sufficient to allow the fruit seedlings sent out by the screw to pass through. The corresponding outlet end bearing seat 6 can be, for example, a split bearing seat that is directly mounted on the frame.

[0055] For ease of description, as follows Figure 2 The leading helical blade 16 and the helical rod 11 shown are collectively referred to as a helix. Both the leading helical blade 16 and the helical rod 11 are fixedly mounted on the spindle 10 and are preferably assembled by welding.

[0056] In the embodiments of this utility model, in order to overcome the tendency of seedlings to get stuck or cause blockage when they enter the cylinder, the pitch of the front part of the spiral gradually increases from the feed end to the discharge end, thus forming a variable pitch section. During the process of the seedlings entering the cylinder, they are constrained by the cylinder opening and are initially combed, and the flow rate is controllable. If the variable pitch section exists, it is equivalent to the internal compression of the seedlings gradually decreasing during the process, so that the seedlings have a certain amount of expansion after entering the cylinder, which helps to reduce or eliminate the sticking and thus prevents the seedlings from directly blocking the cylinder opening.

[0057] Regarding the drive of the helical rotor, a helical roller motor 9 is connected to the tail end of the spindle 10, that is, the rear end. In the example of a double helical rotor, the two helical rotors can be configured with helical roller motors 9 independently, or they can share a single helical roller motor 9.

[0058] Furthermore, if a single spiral roller motor 9 is shared, Figure 1 In this design, a double sprocket 8 is provided at the tail end of one spiral rotor, and a driven sprocket can be provided on the other spiral rotor. The two spiral rotors can be driven by a chain drive mechanism.

[0059] Regarding the aforementioned double sprocket 8, if it is only used to drive the rotation of one driven object, it can be configured as a single-drive sprocket.

[0060] Since the transmission chain in the chain drive mechanism is a flexible component with a certain buffering capacity, it is well-suited for materials such as fruit seedlings. Similarly, for example, the spiral roller motor 9 can be connected to the spindle 10 using a flexible coupling.

[0061] exist Figure 1 The illustrated structure also includes a feeding roller 1 located at the front of the feed end to assist in feeding the fruit vines. For granular materials, feeding is generally achieved by relying on the natural flow of the material under gravity. However, for fruit vines, feeding often requires a separate feeding device to control the feeding speed within a suitable range.

[0062] exist Figures 1-3 In the illustrated structure, the variable pitch section forms a leading helical blade 16, which replaces part of the helical rod 11 to facilitate combing the fruit seedlings.

[0063] contrast Figure 2 and Figure 3 The leading helical blade 16 and the helical rod 11 have distinct shapes. The leading helical blade 16 has a complete helical surface, while the helical rod 11 consists only of the large-diameter portion and the part used to connect the helical rod 11 to the spindle 10, as shown in the figure as the support rod 15. The leading helical blade 16 not only winds and conveys the fruit vines but also helps to comb them, allowing them to be guided more smoothly into the cylinder.

[0064] Meanwhile, the leading spiral blade 16, i.e. the aforementioned variable pitch section, has a relatively complete spiral surface that is more conducive to the stretching of the fruit seedlings.

[0065] The screw rod 11 does not have a complete spiral surface, but for fruit seedlings, the materials are entangled inside. The screw rod 11 can still ensure that the fruit seedlings are twisted backward. This is common knowledge in the field and will not be elaborated here.

[0066] During the spiral backward conveying of the seedlings, the pepper fruits fall off due to centrifugal force and the resistance of the net bottom 13, and the seedlings are finally discharged from the tail of the spiral roller.

[0067] Regarding the aforementioned leading helical blade 16, its length should not be too large or too small. If it is too small, the leading function will not be realized or will be weak. If it is too large, it will play the same role as a traditional screw conveyor, with limited conveying capacity for fruit seedlings. Therefore, the length of the leading helical blade 16 is 10.5% to 14.2% of the axial length of the helix.

[0068] To improve the ability to agitate the fruit vines, triangular or U-shaped protrusions 12 are distributed on the radial centrifugal side of the spiral rod 11. Among them, in Figure 2 In the middle, the protrusion 12 is a U-shaped protrusion. For the triangular protrusion 12, its overall structure is actually a V-shaped structure. Based on the bending, an arc-shaped structure will also be formed at the top.

[0069] For V-shaped structural components, the V-angle should not be less than 60°, otherwise the top will be relatively sharp.

[0070] The protrusion 12 is made by bending round steel and then fixing it to the helical rod 11 by welding. Correspondingly, the helical rod 11 is made of steel tubing and wound into a spiral shape.

[0071] When determining the technical parameters of the helix, the size of the protrusion 12, such as the major diameter of the helix, is not considered. The protrusion 12 is used as an accessory attached to the helix rod 11 and is not used as the design basis for the helix rod 11.

[0072] Furthermore, the height of the protrusion 12 is one-seventh to one-fifth of the major diameter of the screw rod 11.

[0073] Furthermore, the distribution density of the protrusions 12 on the corresponding screw rod is 3 to 5 per meter, and the length of the screw rod in this distribution density is the dimension in the axial direction of the screw roller.

[0074] To mitigate damage to chili peppers and reduce mechanical breakage, the ends of the leading spiral blade 16 are rounded, have cylindrical edging, or are welded with cylindrical protective rigid strips. The ends of the leading spiral blade 16 obviously refer to both axial ends. Since the leading spiral blade 16 is made of steel plate, the end edges have sharp edges that can easily damage chili peppers. Therefore, in some embodiments, the front edges of the leading spiral blade 16 can be directly rounded.

[0075] And in Figure 2 In the illustrated structure, a protective round steel strip 19 is welded to the front edge of the leading spiral blade 16. The diameter of the protective round steel strip 19 is different from the aforementioned rounding treatment. The maximum diameter of the arc head formed by the rounding treatment is the thickness of the leading spiral blade 16. However, when the protective round steel strip 19 is used, it is not affected by the thickness of the leading spiral blade 16, so it can have a relatively large diameter and is relatively blunt, making it less likely to damage the pepper fruit.

[0076] In addition, the diameter of the protective round steel strip 19 should not be too large, and should not be more than three times the thickness of the leading spiral blade 16.

[0077] If a cylindrical lip is used, for example, a steel plate can be rolled into a slotted steel tube, with the slots used for the insertion of the front edge of the leading spiral blade 16, and then welded to form a cylindrical lip.

[0078] Regarding the other end of the leading helical blade 16, namely the rear end, the treatment method can be the same as that of the front end, and for example, Figure 2 The measures shown, such as the reinforced round steel bar 20, are to reduce damage to the pepper fruit.

[0079] Regarding the basic parameters of the helix, in a relatively preferred embodiment, the front pitch of the leading helical blade 16 is 550mm~650mm, and the rear pitch is 1900mm~2300mm; wherein the front pitch is preferably 600mm, and the rear pitch is preferably 2000mm.

[0080] Correspondingly, the helix angle of the front part of the leading helical blade 16 is 73°~75°, and the helix angle of the rear part is 40°~46°; wherein, the helix angle of the front part of the leading helical blade 16 is preferably 74.1°, and the helix angle of the rear part is preferably 43°.

[0081] For the screw rod 11, an equidistant screw is adopted, with a usable screw pitch of 5750mm~6250mm, preferably 6000mm, and a usable screw angle of 12.2°~12.6°, preferably 12.4°.

[0082] Furthermore, the major diameter of the leading spiral blade 16 is larger than that of the spiral rod 11, and the difference between the major diameters of the leading spiral blade 16 and the spiral rod 11 is one-sixth to one-third of the major diameter of the spiral rod 11. There are two main considerations. First, as mentioned above, the major diameter of the spiral rod 11 does not take into account the aforementioned protrusion 12. The length of the protrusion 12 in the spiral radial direction is one-seventh to one-fifth of the major diameter of the spiral rod 11. Under the condition of being twisted by the leading spiral blade 16, the chili seedlings will also tend to move along the inner wall of the cylinder due to centrifugal force.

[0083] Given that chili seedlings have poor spiral transport capacity, in the embodiments of this utility model, a three-headed spiral or a double-headed spiral is used to transport the chili seedlings. The typical characteristic of a multi-headed spiral is high transport efficiency. This characteristic is used to improve the transport capacity of the chili seedlings, so that the chili fruit and the seedling are separated during transport.

[0084] In addition, the multi-head spiral mandrel 10 is subjected to more even force and wear is relatively less. For materials such as chili seedlings that are difficult to transport, the use of a multi-head spiral can reduce the load on the mandrel 10 and have a longer service life.

[0085] Furthermore, the multi-head spiral can effectively reduce the impact of pulsation during material conveying. Several spiral units alternately convey materials, making the overall flow of materials such as chili seedlings more stable.

[0086] exist Figure 1 In the illustrated structure, the portion with the mesh bottom 13 and the remaining portion of the cylinder are separate parts. The portion with the mesh bottom 13 constitutes a fixed mesh bottom assembly, while the remaining portion constitutes the cylinder cover, as shown below. Figure 1 The spiral roller cover 4 shown is configured as a split structure, similar to a split bearing housing, so that, for example, the part that causes local congestion can be cleaned when the spiral roller cover 4 is opened separately.

[0087] Even when performing a complete cleaning, opening the spiral roller cover 4 from the top will make the cleaning process relatively smooth.

[0088] Accordingly, such as Figure 5 and Figure 6 The diagram shows a schematic of the structure of a spiral roller cover 4, where a rotating shaft 31 is provided on one side of the cover unit. This rotating shaft 31 engages with, for example, a shaft hole provided on the frame to form a cylindrical hinge pair. On the other side, a buckle 5 is provided, for example.

[0089] Clearly, the axis of the rotating shaft 31 is parallel to the axis of the helical rotor.

[0090] Under normal circumstances, the cylinder cover unit is closed in place, and then the cylinder cover unit is locked to the frame between, for example, two cylinder covers using, for example, clip 5. When maintenance is required, the clip 5 is released, and the cylinder cover unit is lifted upwards to clean the inside of the cylinder.

[0091] Clips (or buckles) are a quick and convenient way to fasten items; common fasteners fall into this category. Screws, such as wing nuts, can also be used for quick and easy installation and removal.

[0092] The cylindrical cover is divided into several segments, which can be opened and handled segment by segment. Accordingly, each segment has an independent fixing part.

Claims

1. A spiral roller characterized in that, include: The cylinder body forms a tubular structure, with one end being the feed end and the other end being the discharge end. The lower part of the cylinder wall forms a mesh bottom to allow the separated chili pepper fruits to fall through. A helical rotor has a spindle and a helix mounted on the spindle. The pitch of the helix gradually increases from the feed end to the discharge end, forming a variable pitch section. The axis of the helical rotor is collinear with the axis of the cylinder, and both ends are mounted on a predetermined frame via bearing seats. A spiral roller motor is mounted on the frame and outputs power to drive the spiral rotor.

2. The spiral roller of claim 1, wherein, The cylinder has two parallel spiral rotors, and each rotor corresponds to one of the cylinders.

3. A spiral roller according to claim 1 or 2, characterised in that It also includes a feed roller located on the front side of the feed end.

4. The spiral roller of claim 1, wherein, The variable pitch section forms the leading helical blade, and the remaining helices are formed by a helical rod and a support rod for fixing the helical rod to the spindle.

5. The spiral roller of claim 4, wherein, The length of the leading helical blade is 10.5% to 14.2% of the axial length of the helix.

6. A spiral roller according to claim 4 or 5, characterised in that, The screw rod has triangular or U-shaped protrusions distributed on the centrifugal side of the screw.

7. The spiral roller of claim 6, wherein, The height of the protrusion is one-seventh to one-fifth of the major diameter of the screw rod.

8. The spiral roller of claim 6, wherein, The distribution density of the protrusions on the corresponding helical rod is 3 to 5 per meter, and the length of the helical rod in this distribution density is the dimension along the axial direction of the helical roller.

9. The spiral roller of claim 4, wherein, The end of the leading spiral blade is rounded, has a cylindrical lip, or is welded with a cylindrical protective rigid strip.

10. The spiral roller of claim 4, wherein, The leading helical blade has a front pitch of 550mm~650mm and a rear pitch of 1900mm~2300mm. Correspondingly, the helix angle at the front of the leading helical blade is 73°~75°, and the helix angle at the rear is 40°~46°; The pitch of the screw rod is 5750mm~6250mm, which is a constant pitch screw, and the helix angle of the screw rod is 12.2°~12.6°.

11. The spiral roller of claim 10, wherein, The major diameter of the leading helical blade is larger than that of the helical rod, and the difference between the major diameters of the leading helical blade and the helical rod is one-sixth to one-third of the major diameter of the helical rod.

12. The spiral roller of claim 1, wherein, The spiral is either a three-ended spiral or a two-ended spiral.

13. The spiral roller of claim 1, wherein, The part with the mesh bottom and the rest of the cylinder body are separate parts from each other. The part with the mesh bottom constitutes a fixed mesh bottom assembly, while the rest of the part constitutes a cylinder cover. Accordingly, the cylindrical cover has a hinge on one side and a fixing part on the other side, so that when the fixing part is released, the cylindrical cover can be lifted on one side with the hinge as the axis.

14. The spiral roller of claim 13, wherein, The cylindrical cover has multiple segments; Accordingly, each segment has an independent fixing part.

15. A spiral roller according to claim 13 or 14, characterised in that The fixing part is a snap-on fixing part.

16. A pepper harvester characterized in that, Includes the spiral roller as described in any one of claims 1 to 15.

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