Peanut decorticator concave screen and method of making same

Abstract

This invention discloses a concave plate sieve for peanut shelling and its manufacturing method. The concave plate sieve includes two arc-shaped plates placed at both ends and multiple rods erected between the two arc-shaped plates. All rods are equidistantly arranged along a distributed arc and are parallel to the axial direction of the arc-shaped plates. It also includes a stiffening mechanism located between the two arc-shaped plates and acting on all rods. The stiffening mechanism includes an arc-shaped component and short rods connecting the arc-shaped component to each rod. The arc-shaped component is coaxial with the distributed arc containing all rods, and the radius of the arc-shaped component is larger than the radius of the distributed arc. The short rods extend radially along the arc-shaped component. In this invention, by adding a reasonably designed stiffening mechanism, on the one hand, the stiffness of the middle section of the rods can be effectively improved, avoiding the problem of missed pods and increased incomplete shelling caused by inconsistent gap sizes between the rods; on the other hand, it does not affect the position of the peanut pods passing through the stiffening mechanism.

Description

Technical Field

[0001] This invention relates to the field of peanut shelling technology, and in particular to a concave plate sieve for peanut shelling and its manufacturing method. Background Technology

[0002] The concave sieve is one of the core working components of a peanut shelling machine. During the peanut shelling process, the shelling drum works in conjunction with the concave sieve. The drum's striking plates or threshing rods repeatedly strike and rub the peanut pods inside the concave sieve, causing the peeled peanut kernels to fall through the gaps in the sieve's rods, thus achieving shelling and sieving. Therefore, the overall structural strength of the concave sieve and the uniformity of the sieve hole gaps directly determine the peanut shelling rate, breakage rate, and overall operating efficiency.

[0003] Traditional concave sieves, as shown in the applicant's prior application CN 113039893 A, employ a circular grid structure. When the diameter of the circular grid bars is small (or long), the strength of the middle section is insufficient, making it prone to deformation during operation. This results in uneven gaps between the grid bars, thus reducing the threshing rate. To address the insufficient rigidity caused by excessively long bars, existing solutions typically add a transverse intermediate support structure between the first and second arc-shaped plates. For example, patent CN 223094280 U discloses a concave sieve and threshing drum, which uses at least one reinforcing support plate between the first and second arc-shaped plates, allowing all the threshing bars to pass through the rotating holes on the arc-shaped plates and the reinforcing support plate for joint installation. While this existing solution provides some support and reinforcement to the middle section of the threshing bars, it has a significant drawback: because the reinforcing support plate is equivalent to a reinforcing rib structure, it directly cuts off the upper working surface of the bars in the middle area, physically obstructing the peanut pods moving along the bar's axial direction. This severely affects the smoothness of material movement along the axial direction of the concave screen, easily causing material blockage and reducing production throughput efficiency. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a concave screen for peanut shelling that can effectively improve the rigidity of the middle section of the concave screen bar without obstructing the smooth movement of peanut pods along the axial direction of the concave screen, and its manufacturing method.

[0005] Technical solution: To achieve the above objective, the concave plate sieve for peanut shelling of the present invention includes two arc-shaped plates placed on the first and last sides and a plurality of rods erected between the two arc-shaped plates. All the rods are equidistantly arranged along a distributed arc and the rods are parallel to the axial direction of the arc-shaped plates. It also includes a stiffness-reinforcing mechanism located between the two arc-shaped plates and acting on all the rods.

[0006] The stiffness-enhancing mechanism includes an arc-shaped component and a short rod connecting the arc-shaped component to each of the bars; the arc-shaped component is coaxially arranged with the distributed arcs containing all the bars, and the radius of the arc-shaped component is larger than the radius of the distributed arcs, that is, the arc-shaped component is located on the outside of all the bars, and there is a gap between the inner side of the arc-shaped component and the outermost side of the bar; the short rod extends radially along the arc-shaped component and connects the arc-shaped component to the outer side of the corresponding bar.

[0007] Furthermore, the number of stiffness-reinforcing mechanisms can be one or more. When there are multiple stiffness-reinforcing mechanisms, all of them are equidistantly distributed. In actual operation, the number of stiffness-reinforcing mechanisms can be determined according to the length of the rod, and all stiffness-reinforcing mechanisms divide the rod into multiple segments with equal distances.

[0008] Furthermore, the rod has a mating part connecting to the short rod, and both ends of the rod have a first positioning groove. The arc-shaped plate has a second positioning groove aligned with the first positioning groove. The arc-shaped plate and the rod are positioned relative to each other by positioning pieces that simultaneously embed into the first and second positioning grooves. The first positioning groove extends radially along the arc-shaped plate. The relative position between the first positioning groove and the mating part on the rod is fixed.

[0009] Furthermore, the mating part is a blind hole or a milled connecting surface.

[0010] The manufacturing method of the concave sieve for peanut shelling described above includes the following steps:

[0011] Step S1: Manufacture the stiffness strengthening mechanism; In this invention, the stiffness strengthening mechanism can be obtained by fixing the originally separate arc-shaped parts and short rods together, which can be fixed by welding or other methods; or it can be integrally formed, for example, by directly laser cutting to obtain an arc-shaped comb-like stiffness strengthening mechanism.

[0012] Step S2: First, the two ends of each rod are positioned with the corresponding arc plate using positioning plates, and the mating parts of all rods are made to be away from the central axis of the arc plate; then, all rods are fixed relative to the arc plate to form the main screen body; this solution can fix the ends of the rods relative to the arc plate by welding.

[0013] Step S3: Position the stiffness strengthening mechanism relative to the main screen body so that the ends of each short rod are matched with the mating parts on the rod bar one by one, and finally fix the ends of the short rods to the rod bar.

[0014] Beneficial effects: The concave plate sieve for peanut shelling and its manufacturing method of the present invention have the following beneficial effects:

[0015] (1) In this invention, by adding a reasonably designed stiffness strengthening mechanism, on the one hand, the stiffness of the middle section of the rod can be effectively improved, which solves the problem that the middle section of the rod is easily deformed due to its own excessive length, and avoids the problem of leakage and increased incomplete shelling rate caused by inconsistent gap size between the rods; on the other hand, the way in which the arc-shaped part and the radially extended short rod connect all the rods in this invention will not affect the position of the peanut pods passing through the stiffness strengthening mechanism, and while strengthening the stiffness, it ensures the smoothness of the material moving along the axial direction of the concave plate screen.

[0016] (2) By setting the first positioning groove, the second positioning groove and the positioning plate, the relative positions of the rods and the arc plate can be determined during the manufacturing process of the concave plate screen, so that all the short rods in the stiffness strengthening mechanism can be smoothly positioned with all the corresponding rods, ensuring that the rods and the corresponding short rods are fully connected and fixed, improving the structural reliability of the concave plate screen and reducing the manufacturing difficulty.

[0017] (3) The manufacturing method of the present invention, on the one hand, firstly, the rigidity strengthening mechanism is prefabricated separately, then the positioning structure is used to complete the precise assembly of the main screen body, and finally the two are connected as a whole. This step-by-step assembly and fixing process reduces the manufacturing difficulty of the concave screen of the present invention. On the other hand, when assembling the main screen body in step S2, the orientation and relative position of the mating parts on each bar are unified in advance, ensuring that all the short bars on the rigidity strengthening mechanism in step S3 can be precisely aligned with the bars at one time, improving the positioning and fixing efficiency, and ensuring the reliability and stability of the overall structure of the finished concave screen. Attached Figure Description

[0018] Figure 1 A three-dimensional structural diagram of a concave sieve used for shelling peanuts;

[0019] Figure 2 Axial structural diagram of a concave sieve used for shelling peanuts;

[0020] Figure 3 for Figure 1 Enlarged structural diagram of section A;

[0021] Figure 4 for Figure 1 Enlarged structural diagram of part B;

[0022] Figure 5 This is a structural diagram of the rod.

[0023] In the figure: 1-arc plate; 1a-second positioning groove; 2-rod; 2a-fitting part; 2b-first positioning groove; 3-rigidity strengthening mechanism; 31-arc component; 32-short rod; 4-positioning piece; 5-hanging plate. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2 The peanut shelling concave sieve shown includes two arc-shaped plates 1 placed on both ends and multiple rods 2 erected between the two arc-shaped plates 1. All the rods 2 are equidistantly arranged along a distributed arc and are parallel to the axial direction of the arc-shaped plates 1. It also includes a stiffening mechanism 3 located between the two arc-shaped plates 1 and acting on all the rods 2. A hanging plate 5 connects the ends of the two arc-shaped plates 1. The hanging plate 5 facilitates the hanging and fixing of the concave sieve during installation and also provides structural reinforcement, preventing the two arc-shaped plates 1 from being completely connected by the rods.

[0026] like Figure 2 and Figure 3 As shown, the stiffness strengthening mechanism 3 includes an arc-shaped component 31 and short rods 32 connecting the arc-shaped component 31 to each of the rods 2. The arc-shaped component 31 is coaxially arranged with the distributed arcs containing all the rods 2, and the radius of the arc-shaped component 31 is larger than the radius of the distributed arcs, that is, the arc-shaped component 31 is located on the outside of all the rods 2, and there is a gap between the inner side of the arc-shaped component 31 and the outermost side of the rod 2. The short rods 32 extend radially along the arc-shaped component 31 and connect the arc-shaped component 31 to the outer side of the corresponding rod 2. In this embodiment, the arc-shaped plate 1 is an arc-shaped plate material cut by laser cutting or other processing techniques; the rod 2 is a long strip structure with a circular cross-section; and the arc-shaped component 31 is a bent arc-shaped rod. In other embodiments, the arc-shaped component 31 can also be an arc-shaped plate material cut by laser cutting or other processing techniques.

[0027] In this invention, by adding a reasonably designed stiffness-enhancing mechanism 3, on the one hand, the stiffness of the middle section of the rod 2 can be effectively improved, solving the problem that the middle section of the rod 2 is prone to deformation due to its excessive length, and avoiding the problem of increased pod leakage and incomplete pod removal caused by inconsistent gap sizes between the rods 2; on the other hand, the way in which the arc-shaped part 31 and the radially extending short rod 32 connect all the rods 2 will not affect the position of the peanut pods passing through the stiffness-enhancing mechanism 3, and while enhancing the stiffness, it ensures the smoothness of the material moving along the axial direction of the concave plate screen.

[0028] Preferably, the number of stiffness-reinforcing mechanisms 3 is one or more. When the number of stiffness-reinforcing mechanisms 3 is multiple, all stiffness-reinforcing mechanisms 3 are distributed at equal intervals. In actual operation, the number of stiffness-reinforcing mechanisms 3 can be determined according to the length of the rod 2, and all stiffness-reinforcing mechanisms 3 divide the rod 2 into multiple segments with equal distances.

[0029] Preferably, such as Figure 5As shown, the rod 2 has a mating part 2a that connects to the short rod 32, such as... Figure 4 As shown, both ends of the rod 2 have first positioning grooves 2b, and the arc-shaped plate 1 has a second positioning groove 1a aligned with the first positioning grooves 2b. The arc-shaped plate 1 and the rod 2 are positioned relative to each other by positioning pieces 4 that simultaneously embed into the first positioning groove 2b and the second positioning groove 1a. The first positioning groove 2b extends radially along the arc-shaped plate 1. The relative position between the first positioning groove 2b on the rod 2 and the mating part 2a is fixed.

[0030] By setting the first positioning groove 2b, the second positioning groove 1a, and the positioning piece 4, the relative positions of the rod 2 and the arc plate 1 can be determined during the manufacturing process of the concave plate screen, so that all the short rods 32 in the rigidity strengthening mechanism 3 can be smoothly positioned with all the corresponding rods 2, ensuring that the rods 2 and the corresponding short rods 32 are fully connected and fixed, improving the structural reliability of the concave plate screen and reducing the manufacturing difficulty.

[0031] Preferably, the mating part 2a is a blind hole or a milled connecting surface. Since the short rod 32 is located on the back side of the working surface of the rod 2 after connection and extends outward in a direction parallel to the radial direction of the arc plate 1, it will not affect the working surface of the rod 2, and will not cause the working surface of the supported position of the rod 2 to have outward convex features, and its working surface remains smooth, ensuring that peanuts or peanut kernels can move smoothly along the rod.

[0032] The concave sieve of the present invention works in conjunction with a shelling roller. As shown in prior application CN113039893, the shelling roller is located inside the concave sieve and is coaxially arranged with it. The shelling roller has multiple striking plate structures arranged in a circumferential array, which can beat and knead the peanut pods inside the concave sieve. The shelled peanut kernels fall out from the gaps between the rods 2, thus achieving peanut shelling.

[0033] The manufacturing method of the concave sieve for peanut shelling described above includes the following steps:

[0034] Step S1: Manufacture the stiffness strengthening mechanism 3. In this invention, the stiffness strengthening mechanism 3 can be obtained by fixing the originally separate arc-shaped part 31 and the short rod 32 together, which can be fixed by welding or other methods; or it can be integrally formed, for example, by directly laser cutting to obtain the arc-shaped comb-shaped stiffness strengthening mechanism 3.

[0035] In step S2, the positioning piece 4 is used to position the two ends of each rod 2 to the corresponding arc plate 1, and the mating part 2a of all rods 2 is made to be away from the central axis of the arc plate 1; then all rods 2 are fixed relative to the arc plate 1 to form the main screen body; in this embodiment, the ends of the rods 2 can be fixed relative to the arc plate 1 by welding.

[0036] Step S3: Position the stiffness-enhancing mechanism 3 relative to the main screen body, so that the ends of each short rod 32 correspond one-to-one with the mating parts 2a on the rod 2, and finally fix the ends of the short rods 32 to the rod 2. In this embodiment, the heads of the short rods 32 can be fixed to the rod 2 by welding.

[0037] The manufacturing method of the present invention, on the one hand, firstly, prefabricates the rigidity strengthening mechanism 3 separately, then uses the positioning structure to complete the precise assembly of the main screen body, and finally connects the two together as a whole. This step-by-step assembly and fixing process reduces the manufacturing difficulty of the concave screen of the present invention. On the other hand, when assembling the main screen body in step S2, the orientation and relative position of the mating parts 2a on each rod 2 are pre-unified, ensuring that all the short rods 32 on the rigidity strengthening mechanism 3 can be precisely aligned with the rods 2 in one go in step S3, which improves the positioning and fixing efficiency and ensures the reliability and stability of the overall structure of the finished concave screen.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A concave plate sieve for shelling peanuts, comprising two arc-shaped plates (1) placed on both ends and a plurality of rods (2) erected between the two arc-shaped plates (1), all the rods (2) being equidistantly arranged along a distributed arc and the rods (2) being parallel to the axial direction of the arc-shaped plates (1); further comprising a stiffening mechanism (3) located between the two arc-shaped plates (1) and acting on all the rods (2); characterized in that: The stiffness strengthening mechanism (3) includes an arc-shaped member (31) and a short rod (32) connecting the arc-shaped member (31) and each of the rods (2); the arc-shaped member (31) is coaxially arranged with the distributed arc where all the rods (2) are located, and the radius of the arc-shaped member (31) is greater than the radius of the distributed arc; the short rod (32) extends radially along the arc-shaped member (31).

2. The concave plate sieve for peanut shelling according to claim 1, characterized in that, The number of stiffness strengthening mechanisms (3) is one or more. When the number of stiffness strengthening mechanisms (3) is multiple, all stiffness strengthening mechanisms (3) are distributed at equal intervals.

3. The concave plate sieve for peanut shelling according to claim 1, characterized in that, The rod (2) has a mating part (2a) that connects to the short rod (32), and both ends of the rod (2) have a first positioning groove (2b). The arc plate (1) has a second positioning groove (1a) that is aligned with the first positioning groove (2b). The arc plate (1) and the rod (2) are positioned to each other by a positioning piece (4) that is simultaneously embedded in the first positioning groove (2b) and the second positioning groove (1a). The first positioning groove (2b) extends radially along the arc plate (1).

4. The concave plate sieve for peanut shelling according to claim 1, characterized in that, The mating part (2a) is a blind hole or a milled connecting surface.

5. The method for manufacturing a concave plate sieve for peanut shelling as described in any one of claims 1-4, characterized in that, The manufacturing method includes the following steps: Step S1, manufacture the stiffness strengthening mechanism (3); Step S2: First, the two ends of each rod (2) are positioned with the corresponding arc plate (1) by the positioning piece (4), and the mating part (2a) of all rods (2) is away from the central axis of the arc plate (1); then all rods (2) are fixed relative to the arc plate (1) to form the main screen body. Step S3: Position the stiffness strengthening mechanism (3) relative to the main screen body so that the ends of each short rod (32) are matched with the mating parts (2a) on the rod (2) one by one. Finally, fix the ends of the short rods (32) to the rod (2).

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