A screw propeller for a vertical rice mill

Abstract

The utility model relates to a kind of grain processing machinery and equipment, provide a helical propeller of vertical rice mill, the helical propeller diameter 600±20 millimeter, pitch 60 millimeter, helical groove depth 45 millimeter, axial total height 360±40 millimeter, the number of heads of helical rib is 4 heads, and the head of 4 helical ribs is evenly distributed in the circumferential direction 90 °.The helical propeller of vertical rice mill of the utility model, using unique design parameter, not only can improve the output of single rice mill, satisfy the market demand of rice processing industry to large-scale, intensive development, and because the axial total height size of helical propeller is large, the number of heads is more, when rice mill works, the axial thrust of helical propeller is larger, brown rice is very good in flowability in rice mill chamber, brown rice can be evenly polished by sand roller, not easy to break, improve the processing precision of rice, improve the yield of finished rice.

Description

Technical Field

[0001] This utility model relates to a grain processing machinery and equipment, and more particularly to a screw propeller for a vertical rice milling machine. Background Technology

[0002] A vertical rice milling machine is a grain processing machine used to remove the bran from the surface of brown rice. For example... Figure 1 As shown, when the rice milling machine mills brown rice, the brown rice first enters the feed hopper 1, and is pushed towards the screw propeller 5 by the feed auger 2. The screw propeller 5 pushes the brown rice from bottom to top into the milling chamber (the annular gap formed by the rice sieve 11 and the sand roller 6 is the milling chamber). The brown rice moves upward along the surface of the sand roller 6 in a spiral motion. During the upward movement, the rice grains are constantly tumbling and being milled under the action of the high-speed rotating sand roller 6. There are constant collisions, friction and compression between rice grains, between rice grains and the sieve plate, and between rice grains and the rice knife, so that the rice bran on the surface of the brown rice is torn off, peeled off and whitened. The whitened rice continues to move upward to the rice spreading roller 7. Under the rotation of the rice spreading roller and the scraping action of the discharge scraper 8, it flows into the discharge trough 10 and is discharged out of the machine through the discharge trough. The bran peeled off from the surface of the brown rice passes through the sieve holes on the sieve plate 11 in the rice milling chamber and flows into the annular space formed by the sieve plate and the bran suction cover 12. Under the action of the external fan, it flows downward along with the rotating downward airflow. After passing through the annular interlayer space of the feed seat cylinder 13, it reaches the feed bearing seat 3 and is discharged from the air duct 14 under the rotating pushing action of the bran discharge blades 4.

[0003] From the above process of brown rice being whitened in the rice milling chamber, it is clear that the screw propeller is the power source for the upward spiral motion of the rice grains within the milling chamber, resulting in whitening. Traditional rice milling machines have small screw propeller diameters (less than 550 mm), small pitches (less than 55 mm), small axial total heights (less than 305 mm), and few screw heads (at most three). Due to these drawbacks, the axial thrust of the screw propeller is small, resulting in poor flowability of brown rice within the milling chamber, increased local resistance, and uneven pressure on the brown rice during whitening. This affects the processing precision of the rice, makes the rice more prone to breakage, and reduces the yield of finished rice. The output of a single single-roller rice milling machine is relatively small, not exceeding 15 tons / hour. Summary of the Invention

[0004] In recent years, with the development of my country's rice processing industry towards large-scale and intensive operations, the market demand for large-scale, high-quality rice milling machines has been increasing year by year. The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a screw propeller for a vertical rice milling machine. This not only meets the urgent market demand for large-scale rice processing equipment and reduces production costs, but also produces high-precision rice with a high yield, thereby improving economic efficiency.

[0005] The objective of this invention is achieved through the following technical solution.

[0006] This utility model provides a screw propeller for a vertical rice milling machine. The screw propeller has a diameter of 600±20 mm, a screw pitch of 60 mm, and a screw groove depth of 45 mm, enabling a single single-roller rice milling machine to produce 18 to 25 tons per hour.

[0007] In the above technical solution, the total axial height of the propeller is 360±40 mm, and the number of heads of the spiral ribs is 4. The heads of the 4 spiral ribs are evenly distributed at 90° in the circumferential direction.

[0008] The screw propeller of this utility model vertical rice milling machine adopts unique design parameters, which not only increases the output of a single rice milling machine and meets the market demand for large-scale and intensive development of the rice processing industry, but also, due to the large axial total height dimension and multiple heads of the screw propeller, the axial thrust of the screw propeller is large during the operation of the rice milling machine. The brown rice has good fluidity in the milling chamber, can be evenly whitened by the sand roller, is not easy to break, improves the processing precision of rice, and increases the yield of finished rice. Attached Figure Description

[0009] Figure 1 This is a diagram showing the operating status of a vertical rice milling machine.

[0010] Figure 2 This is a diagram showing the external structure and dimensions of the propeller in an embodiment of this utility model.

[0011] Figure 3 This is a three-dimensional schematic diagram of the propeller of this utility model embodiment. Detailed Implementation

[0012] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0013] like Figure 2 , Figure 3 As shown, this embodiment provides a screw propeller for a vertical rice milling machine. The screw propeller has a diameter of 600 mm (±20 mm), a pitch of 60 mm, a screw groove depth of 45 mm, and a total axial height of 360 mm (±40 mm). The screw ribs A2 have four heads, and the heads A1 of the four screw ribs are evenly distributed at 90° angles along the circumference. The output of a single single-roller rice milling machine reaches 18–25 tons per hour.

[0014] The screw propeller of this utility model vertical rice milling machine, using the design parameters of the above embodiment, can not only increase the output of a single single-roller rice milling machine, but also improve the processing precision of rice and increase the yield of finished rice.

[0015] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0016] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw propeller for a vertical rice milling machine, characterized in that: The propeller has a diameter of 600±20 mm, a pitch of 60 mm, a groove depth of 45 mm, a total axial height of 360±40 mm, and four spiral ribs.

2. The screw propeller of the vertical rice milling machine according to claim 1, characterized in that: The spiral rib has four heads, and the heads of the four spiral ribs are evenly distributed at 90° in the circumferential direction.

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