Ruler-changing sorting device

Abstract

The utility model discloses a size-changing sorting device which is characterized in that bundled uncertain-size bars are scattered on the inclined surface of a sorting platform, the inclined surface of the sorting platform is connected with a first side part and a second side part, with a height difference, of the sorting platform, and a size-changing platform is adjacent to the first side part with the lower height and is lower than the first side part; the variable-size bars meeting the size changing requirement fall to the working surface of the size changing platform from the sorting platform by overlaying gravitational potential energy and are supported by a carrier roller on the size changing platform, the carrier roller rotates relative to the size changing platform and pushes the variable-size bars to move, and a size fixing piece which is arranged on the size changing platform and connected to the working surface and spaced from the carrier roller is adjacent to the size changing platform and used for fixing the variable-size bars. The shearing machine and the sizing piece are located on the two radial sides of the at least two carrier rollers respectively, and the sizing piece is matched with the shearing machine to conduct sizing and sizing changing. The overall structure is simple, the ruler-changing sorting efficiency is improved through machinery compared with manual work, and the technical problem that the sorting efficiency is effectively improved while the ruler-changing sorting cost is difficult to control is solved to a certain extent.

Description

Technical Field

[0001] The present application belongs to the technical field of bar processing, and in particular relates to a sizing and sorting device. Background Art

[0002] The bar production line can be used to produce bars. In the process of producing bars, the wall thickness, blanks, and processes of the bars are subject to certain dynamic changes, which will cause differences in the size of the bars processed by the shearing and finishing equipment in the bar production line. The bars processed by the shearing and finishing equipment will pass through the sorting equipment, which will divide the bars into fixed-length bars and irregular-length bars.

[0003] At present, the lengths of irregular bars are manually resized to standardize the length of the irregular bars, so as to facilitate the bundling, processing or delivery of the irregular bars. However, the workload of manual sorting and resizing is large, the operation is inconvenient, and the sorting efficiency is low; the investment of automatic sorting and resizing equipment itself is high, and each time it needs to be sorted according to the size set by the program. The use of automatic sorting equipment to sort irregular bars will result in high costs and low sorting efficiency. For irregular bars, it is difficult to control the cost of resizing and sorting while effectively improving the sorting efficiency. Utility Model Content

[0004] The present application aims to at least to some extent solve the technical problem of being difficult to control the cost of resizing and sorting while effectively improving the sorting efficiency. To this end, the present application provides a resizing and sorting device.

[0005] The embodiment of the present application provides a resizing and sorting device, which is applied to resizing and sorting of bars of varying lengths, comprising:

[0006] The sorting platform is provided with a first side portion, a second side portion higher than the first side portion, and an inclined surface connecting the first side portion and the second side portion;

[0007] a sizing platform, adjacent to and lower than the first side portion, the sizing platform being provided with a working surface;

[0008] At least two rollers are rotatably arranged side by side on the working surface of the size-changing platform, and the axis extension line of one end of the roller extends toward the sorting platform;

[0009] The sizing piece and the shearing machine, the sizing piece is arranged on the working surface, the shearing machine and the sizing platform are arranged adjacent to each other, and the sizing piece and the shearing machine are respectively arranged on both sides of the arrangement direction of at least two of the rollers.

[0010] In some or certain embodiments, the sizing platform includes a sizing body in the shape of a cuboid, one surface of which is configured as the working surface, and at least two of the rollers are distributed side by side along the length direction of the working surface.

[0011] In some or certain embodiments, the surface with the largest area of ​​the sizing body is configured as the working surface, and a partition plate protruding and extending along the axial direction of the roller is provided at one end of the sizing platform close to the shearing machine in the length direction.

[0012] In some or certain embodiments, the sizing member and the partition plate are respectively located at two ends of the sizing platform, and the sizing member is an L-shaped plate with an opening facing the roller.

[0013] In some or certain embodiments, the sizing platform is provided with a mounting groove connected to the working surface, the roller is rotatably disposed in the mounting groove, and the peripheral wall of the roller protrudes from the working surface.

[0014] In some or certain embodiments, the sizing platform is further provided with a plurality of first support tubes disposed on the working surface and spaced apart from the rollers, and the axial direction of the first support tubes extends along the axial direction of the rollers.

[0015] In some or certain embodiments, a socket is provided on the first side portion, the opening of the socket faces the size-changing platform, and the sorting platform further comprises a transition rod movably engaged with the socket.

[0016] In some or certain embodiments, the sorting platform is provided with a plurality of second support tubes arranged side by side on the inclined surface, and one end of the second support tube faces the scale-changing platform.

[0017] In some or certain embodiments, the sorting platform includes a prism-shaped sorting body, and a plurality of the second support tubes are arranged at equal distances along the length direction of the sorting body.

[0018] In some or certain embodiments, the sorting platform further comprises an inclined ladder disposed at one end of the sorting body.

[0019] Advantageous effects provided by one or more embodiments of the present application:

[0020] When it is necessary to resize and sort the irregular-length bars, the mixed batch bundled irregular-length bars can be transferred to the sorting platform by means of a lifting device, the bundled irregular-length bars can be broken up on the inclined surface of the sorting platform, and the irregular-length bars that can be resized can be manually selected. Since the inclined surface of the sorting platform connects the first side portion and the second side portion of the sorting platform with a height difference, and the resizing platform is adjacent to and lower than the first side portion with a lower height, the irregular-length bars that meet the resizing requirements can slide down the inclined surface of the sorting platform under manual push by superimposing the gravitational potential energy, and fall to the working surface of the resizing platform due to inertia. In the sorting process of the irregular-length bars, the workload of manually moving the irregular-length bars is reduced, the work required to be done by the irregular-length bars is overcome, and the efficiency of sorting the irregular-length bars is improved. The working surface of the resizing platform is provided with at least two rollers, and the axis extension line of one end of the roller can extend toward the sorting platform. The irregular-size bars can be placed horizontally on the sorting platform, and after rolling down from the sorting platform to the working surface of the resizing platform, they can be supported by at least two rollers. The at least two rollers arranged on the working surface of the resizing platform are rotated relative to the resizing platform, and can push the irregular-size bars to move in the parallel direction of the rollers. The sizing parts connected to the working surface of the resizing platform and spaced from the rollers can play a certain role in positioning and sizing the irregular-size bars on the rollers. In conjunction with the shearing machine adjacent to the resizing platform and located on the radial sides of at least two rollers with the sizing parts respectively, the rollers can rotate to move one axial end of the irregular-size bars to the working port of the shearing machine, so as to complete the sizing and resizing of the irregular-size bars. The sorting and resizing process of irregular-length bars is realized through sorting platforms, resizing platforms and shearing machines, which improves the efficiency of sorting and resizing of irregular-length bars while greatly reducing the workload of workers. In addition, the structures of the sorting platform, resizing platform and shearing machine are relatively simple. The shearing machine is also a common equipment in the bar production line. The investment and preparation cost of the resizing and sorting device is very low. While controlling the sorting and resizing cost of irregular-length bars, the resizing and sorting efficiency of irregular-length bars is effectively improved, which solves the technical problem of being difficult to control the resizing and sorting cost while effectively improving the sorting efficiency to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic structural diagram of a size-changing and sorting device in some embodiments or certain embodiments of the present application is shown.

[0023] Figure 2A side view of a size-changing and sorting device in some embodiments or certain embodiments of the present application is shown.

[0024] Explanation of the reference numerals: 1. Sorting platform; 11. First side; 12. Inclined surface; 13. Insertion hole; 14. Second support tube; 15. Sorting body; 16. Second support leg; 17. Inclined ladder; 18. Second side; 2. Sizing platform; 21. Working surface; 22. Sizing body; 23. Length-fixing member; 24. First support leg; 25. Inclined support; 26. First support tube; 27. Mounting groove; 28. Partition plate; A. Length direction of working surface 21; 3. Support roller; 4. Shearing machine. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0029] The present application will be described below with reference to the accompanying drawings:

[0030] Figure 1 A schematic diagram of the structure of a size-changing and sorting device in some embodiments or certain embodiments of the present application is shown, Figure 2 A side view of a size-changing and sorting device in some embodiments or certain embodiments of the present application is shown, with reference to Figure 1 and Figure 2 The present application provides a resizing and sorting device, which is used for resizing and sorting of indefinite-length bars, comprising:

[0031] The sorting platform 1 is provided with a first side portion 11 , a second side portion 18 higher than the first side portion 11 , and an inclined surface 12 connecting the first side portion 11 and the second side portion 18 .

[0032] The sizing platform 2 is adjacent to and lower than the first side portion 11 . The sizing platform 2 is provided with a working surface 21 and a sizing member 23 provided on the working surface 21 .

[0033] At least two rollers 3 are rotatably arranged side by side on the working surface 21 of the size-changing platform 2 , and the axis extension line of one end of the roller 3 extends toward the sorting platform 1 .

[0034] The shearing machine 4 and the length-changing platform 2 are arranged adjacent to each other, and the shearing machine 4 and the length-changing member 23 are arranged on both sides of at least two rollers 3 in the arrangement direction, respectively.

[0035] When it is necessary to resize and sort the irregular-length bars, the mixed batch bundled irregular-length bars can be transferred to the sorting platform 1 by a lifting device, and the bundled irregular-length bars can be broken up on the inclined surface 12 of the sorting platform 1, and the irregular-length bars that can be resized are manually selected. Since the inclined surface 12 of the sorting platform 1 connects the first side portion 11 and the second side portion 18 of the sorting platform 1 with a height difference, and the resizing platform 2 is adjacent to the first side portion 11 with a lower height and is lower than the first side portion 11, the irregular-length bars that meet the resizing requirements can slide down from the inclined surface 12 of the sorting platform 1 under manual push by superimposing the gravitational potential energy, and fall to the working surface 21 of the resizing platform 2 due to inertia. In the sorting process of the irregular-length bars, the workload of manually moving the irregular-length bars is reduced, and the work required to be done by the irregular-length bars is overcome, which is conducive to improving the efficiency of sorting the irregular-length bars. The working surface 21 of the resizing platform 2 is provided with at least two rollers 3, and the axial extension line of one end of the roller 3 can extend toward the sorting platform 1. The irregular-sized bars can be placed horizontally on the sorting platform 1, and after rolling down from the sorting platform 1 to the working surface 21 of the resizing platform 2, they can be supported by at least two rollers 3. The at least two rollers 3 rotatably arranged on the working surface 21 of the resizing platform 2 rotate relative to the resizing platform 2, and can push the irregular-sized bars to move in the parallel direction of the rollers 3. The sizing pieces 23 on the resizing platform 2 connected to the working surface 21 and spaced from the rollers 3 can play a certain role in positioning and sizing the irregular-sized bars on the rollers 3. In cooperation with the shearing machine 4 adjacent to the resizing platform 2 and located on the radial sides of at least two rollers 3 with the sizing piece 23, the roller 3 can rotate to move one axial end of the irregular-sized bars to the working opening of the shearing machine 4, so as to complete the sizing and resizing of the irregular-sized bars. The process of sorting and resizing of irregular-length bars is realized through the sorting platform 1, the resizing platform 2 and the shearing machine 4, etc., which improves the efficiency of sorting and resizing of irregular-length bars while greatly reducing the workload of workers. In addition, the structures of the sorting platform 1, the resizing platform 2 and the shearing machine 4 are relatively simple. The shearing machine 4 is also a common equipment in the bar production line. The investment and preparation cost of the resizing and sorting device is very low. While controlling the cost of sorting and resizing of irregular-length bars, the resizing and sorting efficiency of irregular-length bars is effectively improved, which solves the technical problem of being difficult to control the resizing and sorting cost while effectively improving the sorting efficiency to a certain extent.

[0036] Moreover, in the bar production line, the number of irregular length bars is much less than that of fixed length bars. The irregular length bars need to be accumulated to a certain number before they can be resized, which is more cost-effective. The resizing and sorting device with simple structure, small footprint and low maintenance cost in this application is used for processing, which is more cost-effective than the additional use of automatic sorting equipment for processing.

[0037] It should be noted that the roller 3 can be driven by a motor or the like. Figure 2 The structure of the shearing machine 4 is omitted.

[0038] In some embodiments or certain embodiments, the sizing platform 2 includes a sizing body 22 in the shape of a cuboid, one surface of which is configured as a working surface 21 , and at least two rollers 3 are distributed side by side along the length direction A of the working surface 21 .

[0039] The rectangular resizing body 22 is easy to prepare, and one surface of the resizing body 22 is configured as a working surface 21. At least two rollers 3 are distributed side by side along the length direction A of the working surface 21, and the required installation space is small. At least two rollers 3 can improve the support and transfer effect of the irregular-length bars, and are also beneficial to improving the sorting and resizing efficiency of the irregular-length bars.

[0040] It should be noted that when the irregular-size bar needs to be processed, the axial direction of the irregular-size bar may also extend along the length direction A of the working surface 21 .

[0041] In some embodiments or certain embodiments, the largest surface of the sizing body 22 is configured as the working surface 21 , and a partition plate 28 extending and protruding along the axial direction of the roller 3 is further provided at one end of the sizing platform 2 in the length direction close to the shearing machine 4 .

[0042] The largest surface of the resizing body 22 is configured as the working surface 21, and a partition plate 28 extending and protruding along the axial direction of the roller 3 is also provided at one end of the resizing platform 2 in the length direction. The partition plate 28 can be located between the shearing machine 4 and the roller 3, and the partition plate 28 extends and protrudes along the axis of the roller 3. After the shearing machine 4 shears the roller 3 on the resizing platform 2, the irregular-length bars after resizing and the waste materials after shearing by the shearing machine 4 can be separated by the partition plate 28. It is also convenient to separate the irregular-length bars and the waste materials after resizing.

[0043] In some embodiments or certain embodiments, the sizing member 23 and the partition plate 28 are respectively located at two ends of the sizing platform 2 , and the sizing member 23 is an L-shaped plate with an opening facing the roller 3 .

[0044] The cut-to-length piece 23 and the partition plate 28 are respectively located at the two ends of the length-changing platform 2, and the space utilization rate of the length-changing and sorting platform 1 is relatively high. The cut-to-length piece 23 is an L-shaped plate with an opening facing the roller 3. The cut-to-length piece 23 is easy to prepare and can realize the rapid positioning of the irregular length bars. The positioning piece can also be fixed on the length-changing body 22 after one measurement, reducing the number of drawing and marking processes and errors for each piece to be cut, and the work efficiency can be improved.

[0045] In some or certain embodiments, the distance between the sizing member 23 and the partition plate 28 and the specific position on the sizing body 22 may also be set according to the specifications of the produced rods.

[0046] In some or certain embodiments, the sizing member 23 may also be configured as a block or rectangular plate, etc., and may also play a positioning role.

[0047] In some or certain embodiments, the sizing platform 2 may further include a plurality of first support legs 24 connected to the sizing body 22 at intervals, wherein the plurality of first support legs 24 are connected in parallel to a surface of the sizing body 22, and the surface to which the first support legs 24 are connected is opposite to the working surface 21, so as to facilitate the movement and transportation of the sizing platform 2.

[0048] In some or certain embodiments, the sizing platform 2 may further include an inclined support 25 connected to the same surface as the first support leg 24, so as to increase the strength of the sizing platform 2.

[0049] In some or certain embodiments, the sizing platform 2 is provided with a mounting groove 27 connected to the working surface 21 , the roller 3 is rotatably disposed in the mounting groove 27 , and the peripheral wall of the roller 3 protrudes from the working surface 21 .

[0050] The size-changing platform 2 is provided with a mounting groove 27 to cooperate with the roller 3, which can realize the rotational installation of the roller 3 while reducing the space required for the entire size-changing platform 2. It can facilitate the support of the indefinite-size bars from the sorting platform 1.

[0051] In some embodiments or certain embodiments, the resizing platform 2 is further provided with a plurality of first support tubes 26 disposed on the working surface 21 and spaced apart from the rollers 3, and the axial direction of the first support tubes 26 extends along the axial direction of the rollers 3. The first support tubes 26 can provide support for the irregular-sized bars outside the rollers 3, and can facilitate the movement of the irregular-sized bars in cooperation with the rollers 3, which is beneficial to improving the resizing of the irregular-sized bars. Moreover, the addition of the first support tubes 26 can create a gap between the irregular-sized bars and the working surface 21 of the resizing platform 2, and the gap can be used to insert a bundle of ropes, etc., and is also convenient for bundling the irregular-sized bars after resizing.

[0052] In some or certain embodiments, the mounting groove 27 can be set as a rectangular parallelepiped-shaped resizing body 22. The sizing member 23 and the first support tube 26 can be set on the working surface 21 of the resizing platform 2. The height of the resizing platform 2 can be 450 mm, and the length of the resizing body 22 can be 9000 mm and the width can be 1500 mm. It is easy to prepare and suitable for more bar production lines.

[0053] In some embodiments or certain embodiments, the first side portion 11 is provided with a socket 13, the opening of the socket 13 faces the size-changing platform 2, and the sorting platform 1 also includes a transition rod (not shown in the figure) movably engaged with the socket 13.

[0054] The first side portion 11 is provided with a socket 13, the opening of the socket 13 faces the size-changing platform 2, and the sorting platform 1 may also include a transition rod movably cooperated with the socket 13. The transition rod can be inserted into the socket 13 as needed, and the other end of the transition rod away from the sorting platform 1 can be supported on the sorting platform 1, so that the irregular-size bars can be stably transitioned to the size-changing platform 2.

[0055] It should be noted that the transition rod may not be inserted into the insertion hole 13 , and by adjusting the spacing and angle between the sorting platform 1 and the resizing platform 2 , the indefinite-length bars on the sorting platform 1 may be stably transitioned to the resizing platform 2 .

[0056] In some embodiments or certain embodiments, the sorting platform 1 is provided with a plurality of second support tubes 14 arranged side by side on the inclined surface 12 , and one end of the second support tube 14 faces the scale-changing platform 2 .

[0057] The second support tubes 14 arranged side by side on the inclined surface 12 on the sorting platform 1 can also allow a gap to exist between the irregular-size bars and the inclined surface 12, so as to facilitate the breaking up of the irregular-size bars and improve the sorting efficiency.

[0058] In some embodiments or certain embodiments, the sorting platform 1 includes a prism-shaped sorting body 15 , and a plurality of second support tubes 14 are arranged at equal intervals along the length direction of the sorting body 15 .

[0059] The prism-shaped sorting body 15 is easy to prepare and can enable the indefinite-length bars to slide down to the size-changing platform 2. The plurality of second support tubes 14 are arranged at equal distances along the length direction of the sorting body 15 and are evenly distributed, which is convenient for manual sorting operations.

[0060] In some embodiments or certain embodiments, the sorting platform 1 further comprises an inclined ladder 17 disposed at one end of the sorting body 15. The inclined ladder 17 can facilitate workers to operate the irregular-length bars on the sorting platform 1.

[0061] In some or certain embodiments, the sorting platform 1 may further include a second support leg 16 connected to the sorting body 15 to facilitate the transport and movement of the sorting platform 1. The sorting body 15 of the sorting platform 1 and the resizing body 22 of the resizing platform 2 may be arranged side by side, and the length directions of the resizing body 22 and the sorting body 15 may extend in the same direction, and the axes of the first support tube 26, the second support tube 14 and the roller 3 may extend in the width direction of the resizing platform 2. It occupies a small space and is also easy to operate.

[0062] In some or certain embodiments, the sorting platform 1 and the resizing platform 2 can be integrated and prepared by steel plates, angle steels, channel steels, I-beams, and steel pipes. This can ensure the stability of use and the preparation cost is low. The height of the second side portion 18 of the sorting platform 1 can be 900 mm, the first side portion 11 can be 740 mm high, and the length of the sorting body 15 can be 9000 mm and the width can be 2000 mm.

[0063] In some or certain embodiments, the above-mentioned resizing and sorting device is used to process irregular-sized bars, which can generate an additional operating income of 163,200 yuan / year. The unit price of irregular-sized bar resizing and cutting business currently communicated with the owner is 54.39 yuan / ton (excluding tax), and the cutting volume is estimated to be 3,000 tons / year. After adopting the resizing and sorting device, the processing of irregular-sized bars can be adjusted from 6 people per shift to 4 people per shift, reducing 2 people. Labor costs are saved. Labor costs can be saved by 4,867 yuan / month / person×12 months×2 people=116,800 yuan per year.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0065] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0066] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A size-changing and sorting device, characterized in that: Applied to the resizing and sorting of irregular length bars, including: The sorting platform is provided with a first side portion, a second side portion higher than the first side portion, and an inclined surface connecting the first side portion and the second side portion; a sizing platform, adjacent to and lower than the first side portion, the sizing platform being provided with a working surface; At least two rollers are arranged side by side and rotatably on the working surface of the size-changing platform, and the axis extension line of one end of the roller extends toward the sorting platform; The sizing piece and the shearing machine, the sizing piece is arranged on the working surface, the shearing machine and the sizing platform are arranged adjacent to each other, and the sizing piece and the shearing machine are respectively arranged on both sides of the arrangement direction of at least two of the rollers.

2. The size-changing and sorting device according to claim 1, characterized in that: The sizing platform comprises a sizing body in the shape of a cuboid, one surface of which is configured as the working surface, and at least two rollers are distributed side by side along the length direction of the working surface.

3. The size-changing and sorting device according to claim 2, characterized in that: The surface with the largest area of ​​the sizing body is configured as the working surface, and a partition plate extending and protruding along the axial direction of the roller is provided at one end of the sizing platform close to the shearing machine in the length direction.

4. The size-changing and sorting device according to claim 3, characterized in that: The sizing piece and the partition plate are respectively located at two ends of the sizing platform, and the sizing piece is an L-shaped plate with an opening facing the roller.

5. The size-changing and sorting device according to any one of claims 1 to 4, characterized in that: The sizing platform is provided with a mounting groove connected to the working surface, the roller is rotatably arranged in the mounting groove, and the peripheral wall of the roller protrudes from the working surface.

6. The size-changing and sorting device according to any one of claims 1 to 4, characterized in that: The sizing platform is further provided with a plurality of first support tubes which are placed on the working surface and spaced apart from the rollers, and the axial direction of the first support tubes extends along the axial direction of the rollers.

7. The size-changing and sorting device according to any one of claims 1 to 4, characterized in that: The first side portion is provided with a socket, the opening of which faces the size-changing platform, and the sorting platform further comprises a transition rod movably matched with the socket.

8. The size-changing and sorting device according to any one of claims 1 to 4, characterized in that: The sorting platform is provided with a plurality of second support tubes arranged side by side on the inclined surface, and one end of the second support tube faces the size-changing platform.

9. The size-changing and sorting device according to claim 8, characterized in that: The sorting platform comprises a prism-shaped sorting body, and a plurality of the second support tubes are arranged at equal intervals along the length direction of the sorting body.

10. The size-changing and sorting device according to claim 9, characterized in that: The sorting platform also includes an inclined ladder arranged at one end of the sorting body.

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