CN114308192A

CN114308192A - Rice milling device for rice mill

Info

Publication number: CN114308192A
Application number: CN202111383382.7A
Authority: CN
Inventors: 陈昌军; 陈世粤; 陈世周
Original assignee: Hunan Shunlan Agricultural Technology Development Co ltd
Current assignee: Hunan Shunlan Agricultural Technology Development Co ltd
Priority date: 2021-11-22
Filing date: 2021-11-22
Publication date: 2022-04-12
Anticipated expiration: 2041-11-22
Also published as: CN114308192B

Abstract

A rice milling device for a rice mill comprises a whitening chamber, wherein a rotatable iron roller is arranged in the whitening chamber, and the outer surface of the iron roller is provided with a spiral bulge made of a sand roller material; a rice milling channel for rice grains to flow is arranged between the whitening chamber and the iron roller. On one hand, the rice milling device can greatly improve the rice milling effect, reduce the number of broken rice and reduce the scratches on the surfaces of rice grains, so that the rice milling is uniform, and the rice milling precision is greatly improved; on the other hand, the occupied area of the whole equipment can be reduced, the working efficiency can be improved, the structure is simplified, and the cost is reduced.

Description

Rice milling device for rice mill

Technical Field

The invention relates to a rice mill, in particular to a rice milling device for the rice mill.

Background

The existing rice processing mainly comprises the following steps: husking the rice to obtain brown rice; separating the husked brown rice from the paddy, namely separating the paddy and the brown rice mixture by a paddy separator to achieve the aim of separating the paddy from the brown rice. Then the unpolished rice which is not completely separated is sent back to the unpolished rice separator for continuous separation, and the separated pure unpolished rice is sent to a rice milling working section; the purpose of rice milling is to grind off the husks of the brown rice to obtain the white rice. After the brown rice is milled, a lot of broken rice can be generated due to the friction effect, then screening and grading are carried out, the whole screened rice is weighed and cooled, the final white rice is obtained, and the screened broken rice is recycled for other uses.

The current brown rice whitening equipment mainly adopts the rice mill to realize, and the rice mill is equipped with rotatory roll body including whitening room and fan in the whitening room, be equipped with the sieve between roll body and the whitening room. Under the rotation of the roller body and the effect that the fan blows air to the whitening chamber, full friction or grinding is carried out between the rice grains and the rice grains, between the rice grains and the roller body and between the rice grains and the sieve plate, the purpose of removing the brown rice cortex is achieved, and smooth and bright white rice is obtained. The existing roller body usually adopts an iron roller or a sand roller, and the iron roller type rice mill mainly performs friction separation on rice grains by pressure to achieve the aim of whitening, so that the rice grains have large bearing pressure and are easy to crush. The sand roller type rice mill mainly grinds rice grains at a speed to achieve the aim of whitening, so that the average pressure on the rice grains is small, the produced broken rice is few, and when the sand roller grinds the surfaces of the rice grains, certain scratches can be generated.

In addition, current rice mill is usually with screening plant separation setting, and the two is independent structure, so not only can occupy the area of site, and screening plant structure is complicated moreover, and the cost improves greatly.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the rice milling device for the rice mill, which has the advantages of simple structure, less broken rice, smooth rice grain surface and small occupied area.

The technical scheme of the invention is as follows: a rice milling device for a rice mill comprises a whitening chamber, wherein a rotatable iron roller is arranged in the whitening chamber, and the outer surface of the iron roller is provided with a spiral bulge made of a sand roller material; a rice milling channel for rice grains to flow is arranged between the whitening chamber and the iron roller.

Further, the thickness of the spiral protrusion is 5-15 mm.

Further, the width of the spiral protrusion is 10-20 mm.

Further, the pitch of the upper half part of the spiral protrusion gradually decreases from the initial end to the middle part of the spiral, and the pitch of the lower half part gradually increases from the middle part of the spiral to the final end.

Furthermore, the screw pitches of the upper half part and the lower half part are of a symmetrical structure.

Furthermore, the upper part of the whitening chamber is provided with a feed inlet, the lower part of the whitening chamber is provided with a discharge outlet, the feed inlet and the discharge outlet are both communicated with the rice milling channel, and the iron roller is arranged in the middle of the rice milling chamber and is driven to rotate by a motor; the discharge port is provided with a discharge valve.

Furthermore, the lower part of the whitening chamber is provided with a filter plate, the upper part of the filter plate is a rice milling channel, and the lower part of the filter plate is used for storing broken rice screened by the filter plate.

Further, the below of discharge gate is located to the filter, and the sieve mesh external diameter of filter is greater than broken rice and is less than the size of whole meter.

The invention has the beneficial effects that:

(1) by designing the material of the grinding roller into a spiral protrusion structure, a rice milling channel formed between the iron roller and the inner wall of the whitening chamber is larger than the space of the rice milling channel formed between the spiral protrusion and the inner wall of the whitening chamber, so that the whitening pressure generated by the iron roller is reduced, and broken rice is not easy to generate;

(2) the spiral protrusions made of the sand roller materials are arranged on the outer surface of the iron roller, so that the iron roller and the sand roller are combined together to rub and grind rice grains, when the rice grains are ground, one part of the rice grains are rubbed by the iron roller, and the other part of the rice grains are ground by the spiral protrusions, so that the scratch on the surfaces of the rice grains caused by grinding by the sand roller is reduced, and the number of broken rice is also reduced;

(3) compared with the existing single roller body or the existing roller body divided into a plurality of sections, such as one section of iron roller and one section of sand roller, the rice crushing amount can be greatly reduced, and the smoothness of the surfaces of rice grains is improved; compared with the method that the spiral structure is directly arranged on the sand roller or the iron roller, the grinding effect is greatly improved;

(4) through directly sieving in the whitening chamber, broken rice and whole rice separation, rather than sieving outside the whitening chamber, can reduce the area of whole equipment, can improve work efficiency again, and the grain of rice flows from top to bottom under the rotation of iron roll, and the broken rice can directly sieve, so the filter just need not design into vibrating structure like current device of sieving, simplifies the structure greatly, reduce cost.

Drawings

FIG. 1 is a schematic view of a rice grain structure prior to entry in an embodiment of the present invention;

FIG. 2 is a schematic view of the rice grain structure after entering the rice grain processing device.

The attached drawings indicate the following:

1. a whitening chamber; 2. an iron roll; 3. a spiral protrusion; 4. a rice milling channel; 5. a filter plate; 6. a collection chamber; 7. rice grains; 8. breaking rice; 11. a feed inlet; 12. and (4) a discharge port.

Detailed Description

The invention will be described in further detail below with reference to the drawings and specific examples.

As shown in fig. 1 and 2: a rice milling device for a rice mill comprises a whitening chamber 1, wherein a rotatable iron roller 2 is arranged in the whitening chamber 1, a spiral protrusion 3 is arranged on the outer surface of the iron roller 2, and the spiral protrusion 3 is made of a sand roller material; a rice milling channel 4 for rice grains 7 to flow is arranged between the whitening chamber 1 and the iron roller 2.

The scheme has the following advantages: (1) on one hand, the material of the grinding roller is designed into a spiral protrusion structure, so that a rice milling channel formed between the iron roller and the inner wall of the whitening chamber is larger than the space of the rice milling channel formed between the spiral protrusion and the inner wall of the whitening chamber, the whitening pressure generated by the iron roller is reduced, and broken rice is not easy to generate; on the other hand, through the spiral arch that sets up the emery roller material at the surface of iron roll, combine iron roll and emery roller in other words to carry out the friction to grain of rice 7 and grind, when rolling the grain of rice, partly grain of rice can receive the friction of iron roll, and another part grain of rice receives the bellied grinding of spiral to reduce the scratch that causes the grain of rice surface when the emery roller rolls, also can reduce the quantity of broken rice 8. (2) Above-mentioned structure compares in current single roll body or has now divide into the roll body multisection, for one section iron roll one section sand roller, can greatly reduced broken rice volume, improves the smoothness on grain of rice surface. In addition, if the spiral structure is directly provided on the sand roll or the iron roll, the grinding effect is poor.

In the embodiment, the thickness of the spiral protrusion 3 is 5-15 mm, preferably 10 mm. The thickness range can reduce the whitening pressure generated by the iron roller, thereby reducing the number of broken rice. The width of spiral protrusion 3 is 10~20mm, and preferred 15mm can guarantee spiral protrusion's intensity, and guarantees the protruding area of contact of grain of rice and spiral.

In this embodiment, the spiral protrusion is designed to have the following structure: the pitch of spiral protrusion 3's the first half from the initial end to spiral middle part reduces gradually, and the latter half from the spiral middle part to the pitch at terminal increases gradually, and the first half is the symmetry setting with the pitch of the latter half. Therefore, the screw pitches of the upper part and the lower part are larger, so that the upper part and the lower part mainly carry out friction separation on rice grains by the iron roller 2 under pressure, and the spiral protrusions 3 assist in grinding separation, thereby improving the whitening efficiency of the rice grains and ensuring that too much broken rice cannot be generated; middle part pitch is less, mainly leans on spiral arch 3 to grind and cuts the separation, and iron roll 2 leans on the supplementary friction separation of pressure, because spiral arch 3 pitches are little, and frictional force is great, can drive the rotation with the grain of rice at middle part to also the grain of rice of taking upper portion and lower part is rotatory, thereby improves the whitening efficiency of the grain of rice, also is difficult for causing the scratch to the grain of rice surface. In addition, through with first half and the symmetrical setting of latter half, can make the rice grain at the in-process that from the top down and from the bottom up flow whitewash even, improve the rice milling precision greatly.

In this embodiment, the upper portion of the whitening chamber 1 is provided with a feed inlet 11, the lower portion is provided with a discharge outlet 12, the feed inlet 11 and the discharge outlet 12 are both communicated with the rice milling channel 4, and the iron roller 2 is arranged in the middle of the rice milling chamber 1 and is driven to rotate by a motor. The discharge port 12 is provided with a discharge valve, and the discharge port 12 is closed in the rice milling process to prevent rice from overflowing.

In this embodiment, the lower part of the whitening chamber 1 is provided with a filter plate 5, which is arranged below the discharge port 12 and enables the whole rice to be output from the discharge port, and the broken rice is screened out from the filter plate 5 and enters the collection chamber 6, i.e. the whitening chamber space below the filter plate 5 is used as the collection chamber 6. The outer diameter of the sieve pores of the filter plate 5 is larger than the broken rice and smaller than the whole rice, so that the whole rice is left in the rice milling channel 4 above the filter plate 5, and the broken rice enters the collecting chamber 6 below the filter plate after being filtered for collection and utilization. This embodiment is through directly sieving in whitening chamber 1, with broken rice and whole rice separation, rather than sieving outside the whitening chamber, can reduce the area of whole equipment, can improve work efficiency again, and the grain of rice flows from top to bottom under the rotation of iron roll 2, and the broken rice can directly sieve, so filter 5 just need not design into vibrating structure like the device that sieves now, simplifies the structure greatly, reduce cost.

The working principle of the embodiment is as follows: the brown rice is conveyed to the whitening chamber 1 by a lifter, enters the rice milling channel 4 through the feed inlet 11, and the top of the spiral protrusion 3 is covered by rice grains. The starter motor, control iron roll 2 is rotatory, and rice grain 7 carries out abundant friction between rice grain and the rice grain, between rice grain and the iron roll 2, between rice grain and the spiral arch 3 and grinds under the protruding 3 combined action of iron roll 2 and spiral for impel rice grain from the bottom up and from the top down to flow under the precession effect of spiral arch 3, improve the whitening degree of consistency. And grinding the rice grains 7 by friction and grinding to remove the husked rice skin layer to obtain smooth and bright white rice. Meanwhile, in the whitening process of the rice grains 7, the produced broken rice 8 can be directly screened out from the filter plate 5 and enter the collection chamber 6, and the whole rice is left; then the discharge port 12 is opened, the rice is screwed out from the discharge port 12 under the action of the spiral protrusion 3, and the next procedure is carried out.

In conclusion, on one hand, the rice milling device can greatly improve the rice milling effect, reduce the number of broken rice and reduce the scratches on the surfaces of rice grains, so that the rice milling is uniform, and the rice milling precision is greatly improved; on the other hand, the occupied area of the whole equipment can be reduced, the working efficiency can be improved, the structure is simplified, and the cost is reduced.

Claims

1. A rice milling device for a rice mill is characterized by comprising a whitening chamber, wherein a rotatable iron roller is arranged in the whitening chamber, and the outer surface of the iron roller is provided with a spiral bulge made of a grinding roller material; a rice milling channel for rice grains to flow is arranged between the whitening chamber and the iron roller.

2. A rice milling device for a rice mill according to claim 1 wherein the thickness of the spiral protrusion is 5 to 15 mm.

3. A rice milling device for a rice mill according to claim 1, wherein the width of the spiral protrusion is 10 to 20 mm.

4. A rice milling apparatus as claimed in claim 1, wherein the spiral protrusion has an upper half portion with a pitch gradually decreasing from a start end to a middle portion of the spiral and a lower half portion with a pitch gradually increasing from the middle portion to a finish end of the spiral.

5. A rice milling unit as claimed in claim 4, wherein the pitches of the upper and lower halves are symmetrical.

6. A rice milling device for rice mill as claimed in claim 1, wherein the upper part of the milling chamber is provided with a feed inlet, the lower part is provided with a discharge outlet, the feed inlet and the discharge outlet are both communicated with the milling channel, the iron roller is arranged in the middle of the milling chamber and is driven to rotate by a motor; the discharge port is provided with a discharge valve.

7. A rice milling unit as claimed in claim 6, wherein the lower part of the milling chamber is provided with a filtering plate, the upper part of the filtering plate is a milling passage, and the lower part is used for storing crushed rice screened by the filtering plate.

8. A rice milling apparatus as claimed in claim 7, wherein said filtering plate is provided below the outlet, and the filtering plate has a mesh outer diameter larger than the size of crushed rice and smaller than the size of whole rice.