Salt particle screening device

Abstract

The invention discloses a salt particle screening device which is provided with a stock bin, a bin screening plate integrally horizontal and a driving mechanism capable of driving the stock bin to rotate. The bin sieve plate is in an inverted circular truncated cone shape, the center of the bin sieve plate is a horizontally-arranged small circular truncated cone bottom face, and a plurality of circular sieve holes are distributed in the bin sieve plate. And a plurality of three-dimensional arch-shaped sieve holes are distributed on the circular truncated cone conical surface. The arch-shaped sieve holes are provided with arc-shaped opening edges and arch-shaped edges higher than the conical surface of the circular truncated cone, and the opening directions of the arch-shaped edges face the tangential direction of the conical surface. Coarse salt particles are crushed in an impact touch mode, so that the coarse salt particles are finely crushed; the salt particles are not too fine, the crystal form of the salt particles is reserved, and the appearance quality is good; and the crushing force of the salt particles can be scientifically controlled through calculation.

Description

Technical Field

[0001] The present invention introduces a device for eliminating salt caking. Background Art

[0002] What should be done if industrial salt, salt grains, by-product salt, etc. form lumps? Physical methods can be used to restore them to a loose state:

[0003] 1) Vigorously shake: If the salt is pseudo-caked, pick up the salt shaker and shake it vigorously, or gently squeeze it by hand, and the salt will become loose again.

[0004] 2) Sun-dry and heat: For true caking, the salt can be placed in the sun or slightly heated, which can help the salt return to a loose state.

[0005] 3) Add foreign objects: Put some rice or pasta into the salt shaker, cover the lid, wait for a while and the salt will become loose, then take out the rice or pasta.

[0006] However, such methods are slow in processing speed, cumbersome in process, and have poor effects.

[0007] The invention with application number 202110393687.X relates to a crushing device, in particular to a caking screening, rolling and crushing device for flour processing. The present invention provides an automated caking screening, rolling and crushing device for flour processing with screening, crushing and conveying mechanisms. In this invention, the flour is crushed by the rotation of the blade, and the crushed flour falls into the collection bucket through the circular leaky bucket. Since salt crystals are relatively hard, when the blade of this method is used for salt caking treatment, the noise is large and the blade edge is easily damaged. Summary of the Invention

[0008] Object of the Invention: To provide a salt sieve with a simple device structure that can remove and crush coarse salt grains.

[0009] Technical Solution:

[0010] The salt sieve of the present invention has a feed bin (composed of a cylindrical bin wall, a bottom bin material connected to the bottom of the bin wall; or a bin cover connected to the top of the bin wall, and the bin cover has a feeding port), and a bin sieve plate connected to the central part of the bin wall and integrally horizontal (the upper and lower ends are horizontal, and the local part can be non-horizontal), and a driving mechanism (composed of a motor, a transmission device, a central rotating shaft, a connecting bracket, etc.) that can drive the feed bin to rotate (the motor drives the central rotating shaft to rotate through a transmission mechanism such as a belt or a gear, and the central rotating shaft drives the feed bin to rotate through the connecting bracket).

[0011] In the present invention, the salt grains involved include sodium chloride varieties such as salt grains, industrial salt, by-product salt, etc., and also include common salts such as potassium chloride, sodium sulfate, potassium sulfate, etc.

[0012] The bin above the bin sieve plate is for placing unsorted salt grains, and the bin between the bin sieve plate below and the bin bottom plate is for collecting the screened salt grains.

[0013] The said bin sieve plate is in the shape of an inverted frustum of a cone, composed of a central part and a peripheral part connected. The central part is the horizontal bottom surface of the small frustum of a cone, on which there are numerous circular sieve holes for small salt grains to pass through and fall into the lower bin; the peripheral part is the conical surface of the frustum of a cone, on which there are numerous three-dimensional arched sieve holes for large particles to be broken into small particles and then fall into the lower bin.

[0014] The said arched sieve hole has an arc-shaped opening edge and an arched edge higher than the conical surface of the frustum of a cone. The opening direction of the arched edge faces the tangent direction of the rotation circumference at that place (the arched edges on the same circumference have the same orientation), and is opposite to the rotation direction.

[0015] The small particles have a smaller mass and are less affected by centrifugal force during rotation, and are basically concentrated in the central part and fall through the circular sieve holes on it. The large particles (salt grains that cannot directly fall through the sieve holes) have a larger mass and a larger centrifugal force during rotation, and are basically dispersed to the peripheral part.

[0016] When the driving mechanism drives the bin to rotate, the salt grains rotate along with it on the sieve plate. The large particles are thrown to the peripheral part to rotate and touch the arched edge of the arched sieve hole. When the bin rotates, the salt grains are basically vertically and frontally collided in the tangential direction of the rotation circumference. The force-bearing area is large and the force is large, making it easier to break. The impact force breaks the large salt grains into small particles, and the broken small salt grains fall into the lower part of the bin through the sieve holes.

[0017] The impact force received by the large salt grains is equivalent to the elastic force of the salt grains on the inclined plane (the conical surface, the included angle A with the horizontal plane). By selecting different rotation speeds (w) of the bin, different strengths of impact forces can be obtained (at different rotation radii R, the centrifugal force F, mass m (actually a range, here assuming the average mass of the large particles), and elastic force N of the salt grains form a force balance. At this time, the rotation speed range is the optimal selectable range), and appropriate rotation speeds and impact breaking forces can be obtained.

[0018] The range of the rotation radius R of the conical surface (between the maximum outer diameter R1 of the bin sieve plate and the outer diameter R2 of the central part).

[0019] It can be known through scientific calculation that when the force is balanced, there is:

[0020] F = mw 2 R = mgtgA, that is, w 2 R = gtgA, where g is the acceleration due to gravity.

[0021] Preferably, the arched edge is serrated, which is convenient for providing a relatively sharp cutting edge to easily cut the large salt grains.

[0022] Working process of the salt granule sieve of the present invention:

[0023] Add salt granule particles with uneven thickness from the open top of the silo or the feeding port on the silo cover to the upper part of the silo, and accumulate them on the silo sieve plate.

[0024] Next, the driving mechanism drives the silo to rotate. During the rotation of the silo, due to the action of centrifugal force, the fine salt granules mainly stay in the central part, and the coarse salt granules are mainly thrown to the surrounding parts.

[0025] Most of the fine salt granules fall onto the silo bottom plate through the circular holes located in the center, and a small part fall through the arched holes.

[0026] It is difficult for the coarse salt granules to fall through the circular holes in the central part. When they are thrown to the surrounding parts and contact the arched holes, they are cut and broken by the sharp edges of the arched sides. The coarse particles are broken into smaller particles and fall, and together they accumulate in the lower space of the silo. Finally, they are discharged from the discharge port at the bottom of the silo to obtain salt granules all of which are fine particles.

[0027] Beneficial effects:

[0028] The silo wall, silo sieve plate, silo bottom, or silo cover of the present invention can all be made of stainless steel plates, and the accumulated salt granules are easy to clean, and it is relatively safe and hygienic.

[0029] The structure of the present invention is relatively simple, the equipment is light in weight, and the energy consumption required for operation is low.

[0030] The salt granules are broken by the way of impact and touch, and are screened through the sieve holes, so that all the coarse salt granules are finely broken; instead of using equipment such as grinding, the salt granules will not be overly broken into powder, ensuring that the particle size of the salt granules is relatively uniform, and the crystal form of the salt granules is retained, and the appearance quality is good.

[0031] In addition, by scientifically calculating process parameters such as the rotation speed, the force required for salt granule crushing can be accurately determined, further ensuring the crushing effect, and at the same time, the power required for the motor in the equipment can be calculated. Description of the drawings

[0032] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0033] Figure 2 is Figure 1 a partial three-dimensional perspective view;

[0034] Figure 3 is another three-dimensional structure schematic diagram of the present invention;

[0035] Figure 4 is a partial schematic diagram of the surrounding part of the frustum of the present invention;

[0036] Figure 5 It is another partial schematic diagram of the peripheral part of the frustum of the present invention;

[0037] Figure 6 It is a schematic diagram of the force analysis of coarse salt particles when using the present invention.

[0038] In the figure, 1 - silo; 2 - silo wall; 3 - driving mechanism (4 - motor; 5 - transmission device; 6 - central rotating shaft; 7 - connecting bracket); 8 - bottom material of the silo; 9 - silo sieve plate (19 - central part; 29 - peripheral part); 10 - arched sieve holes; 11 - circular sieve holes; 11 - arched edge; 12 - opening edge; 13 - saw teeth; 20 - coarse salt particles. Detailed implementation manners

[0039] Example 1:

[0040] As Figure 1 , 2 The described salt particle sieve has a silo 1, a silo sieve plate 9 that is integrally horizontal and connected to the central part 19 of the silo wall 2, and a driving mechanism 3 that can drive the silo 1 to rotate. The silo 1 is composed of the silo wall 2 and the bottom material 8 of the silo connected to the bottom of the silo wall 2.

[0041] The described silo sieve plate 9 is in the shape of an inverted frustum of a cone, and is composed of the connection of the central part 19 and the peripheral part 29; the central part 19 is the bottom surface of the small frustum of a cone arranged horizontally, and a large number of circular sieve holes 11 are distributed thereon; the peripheral part 29 is the conical surface of the frustum of a cone, and a large number of three-dimensional arched sieve holes 10 are distributed thereon. The arched sieve holes 10 have an arc-shaped opening edge 12 and an arched edge 11 that is higher than the conical surface of the frustum of a cone, as Figure 3 shown.

[0042] Example 2:

[0043] As Figure 3 shown, the salt particle sieve has a silo 1 and a driving mechanism 3; the driving mechanism 3 is composed of a motor 4, a transmission device 5, a central rotating shaft 6, and a connecting bracket 7. The driving mechanism drives the silo 1 to rotate. The motor 4 drives the central rotating shaft 6 to rotate through a belt transmission mechanism, and the central rotating shaft 6 drives the silo 1 to rotate accordingly through the connecting bracket 7.

[0044] The central part 19 of the silo wall 2 has a frustum-shaped silo sieve plate 9, and the arched edge 11 of the arched sieve holes 10 of the silo sieve plate 9 is in the shape of saw teeth 13, as Figure 4 shown. It has a sawing effect while colliding with the coarse salt particles 20. It not only has a hard collision, but also the cutting edge can cut the hardened coarse salt particles 20 more quickly, and the efficiency of crushing them into fine salt particles is higher and the effect is better.

Claims

1. A salt particle screener, comprising a silo (1), a silo screen plate (9) connected to the central part (19) of a silo wall (2) and being horizontal as a whole, and a driving mechanism (3) capable of driving the silo (1) to rotate, wherein the silo (1) is composed of a silo wall (2), a silo bottom material (8) connected to the bottom of the silo wall (2), or a silo cover connected to the top of the silo wall (2), and characterized in that: The bin screen plate (9) is in the shape of an inverted truncated cone, and is composed of a central portion (19) and a peripheral portion (29) connected together; the central portion (19) is a small truncated cone bottom surface arranged horizontally, on which a plurality of circular sieve holes (11) are distributed; the peripheral portion (29) is a truncated cone surface, on which a plurality of three-dimensional arched sieve holes (10) are distributed, and the arched sieve holes (10) have an arc-shaped opening edge (12) and an arched edge (11) higher than the truncated cone surface.

2. The salt particle screener according to claim 1, characterized in that: The opening direction of the arched edge (11) is toward the tangent direction of its rotating circle, and the arched edges (11) on the same circle have the same direction, which is opposite to the rotating direction.

3. The salt particle screener according to claim 1 or 2, characterized in that: The arched edge (11) is in the shape of a sawtooth (13).

4. The salt particle screener according to any one of claims 1 to 3, characterized in that: The process parameters of the equipment meet the following conditions: 2 R=gtgA, where A is the angle between the cone and the horizontal plane, w is the angular velocity of rotation of the silo (1), m is the average mass of the coarse salt particles (20), g is the gravitational acceleration, and R is between R1 and R2.

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