JPH04260451A - Apparatus for automatically controlling inflow amount into polishing chamber of vertical rice polishing machine - Google Patents

Abstract

PURPOSE:To always hold the amount of rice in a polishing chamber so as to enhance polishing efficiency by arranging a plurality of sensors detecting the amount of rice in the polishing chamber to control the opening and closing of a control valve to the polishing chamber so as to change the up and down positions thereof. CONSTITUTION:As a means obtaining the amount of rice accumulated in a polishing chamber by a sensor indication means after a polishing rotor 7 is rotated at a predetermined rotational speed by starting a vertical rice polishing machine, for example, a third sensor 11b is indicated. When either one of five sensors is indicated, a full-open command is issued to a control valve 3 from a controller and a jack raises a valve main body 13 through a valve lever 14 and rice flows down to the polishing chamber 1 from the gap between the valve main body and the inner periphery of a valve cylinder 12 through an inflow port 9. When the accumulation amount of rice further increases to reach a fourth sensor 11c, the control valve 3 is slightly closed to reach an opening degree slightly larger than a standard opening degree and the amount of rice increases continuously. When rice reaches the indicated third sensor 11b, the control valve is further slightly closed to become the standard opening degree and the inflow amount of rice is slightly reduced to be set to a standard inflow amount.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic rice milling chamber inflow control device for a vertical rice mill that controls the amount of rice grains flowing into the milling chamber in order to maintain an appropriate amount of rice grains in the milling chamber.

0002

[Prior Art] In a conventional vertical rice mill, a rice milling tank, a milling chamber, and a sieve are arranged in order from the top, and the rice grains in the milling tank flow down into the milling chamber. The rice is refined by the rotation of the polishing trochanter made of a whetstone and descends through the milling chamber, falling onto a sieve from the bottom of the milling chamber to separate and remove the rice bran, and then transferred to the milling tank by an elevator incorporating a conveyor installed separately. The rice was returned to the milling room, and then flowed down to the milling room to be milled again, which was a process of circular milling.

[0003] In such circulation rice milling, it is ideal to always maintain the amount of rice grains accumulated in the milling chamber at an amount that allows high milling efficiency to be obtained, but the amount of rice grains in the milling chamber changes depending on the progress of the rice milling ratio. Conventionally, the amount of rice grains leaving the milling room and being returned to the milling tank was measured using a flow meter, and the control valve installed near the top of the milling room was adjusted automatically or manually based on this measured value. It is something that

0004

[Problem to be solved by the invention] In rice milling, the size of the rice grains changes between inflow and discharge due to the rotation of the milling trochanter in the milling room and grinding of the rice grains. Due to the change in the bulk specific gravity of rice due to the temperature increase evaporating the moisture contained in the rice grains, the conventional adjustment valve that is based on the amount of rice coming out of the milling room is not able to control the amount of rice grains in the milling room. Automatic control that maintains a constant level has the problem of not achieving satisfactory results, and manual adjustment has been essential.

[0005] Rice milling for sake brewing with a high milling ratio may require a long time of 40 to 50 hours, and it is not easy to adjust the regulating valve manually over this long period of time, and a large amount of time is required. There was a problem that it required a lot of labor.

An object of the present invention is to provide an automatic control device that constantly maintains the amount of rice grain in a milling chamber at an amount that increases milling efficiency.

[0007]

[Means for Solving the Problems] The present invention provides a vertical rice milling machine equipped with an automatically adjustable regulating valve near the upper end of the milling chamber for adjusting the amount of rice grains flowing into the milling chamber. This is an automatic milling chamber inflow control device for a vertical rice milling machine, in which a plurality of sensors for detecting the amount of rice grain in the milling chamber and controlling the opening and closing of the regulating valve are arranged in the milling chamber at different vertical positions.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments shown in the drawings. FIG. 1 is a partially cut-away side view of the main part of an embodiment of the present invention, in which (1) is a milling room, and above the milling room (1) is a rice milling tank (2). A regulating valve (3) is provided between the upper end of the milling chamber (1) and the lower end of the rice milling tank (2) to adjust the amount of rice grain in the rice milling tank (2) flowing down to the milling chamber (1). ) is provided with an intervening
Further, a sieve (4) is provided below the whitening chamber (1) to sieve the mixture of rice husks and bran discharged from the whitening chamber (1).

The whitening chamber (1) has a whitening trochanter (7) made of a grinding wheel, which is rotatably supported on a vertical main shaft (6), inside a whitening chamber shell (5) having a substantially inverted conical shape. is built-in, and the main shaft (6)
A V-pulley (8) attached to the lower end of the milling chamber is driven by an electric motor (not shown) to rotate the milling trochanter (7), which is located inside the milling chamber shell (5). The upper roll (7a), middle roll (7b),
Three tiered rolls with smaller diameters are formed in order from above the lower tiered roll (7c).

The whitening chamber shell body (5) has an inlet (9) at the center of the upper end and an outlet (10) at one side of the lower end, and the whitening chamber (1) has an inlet. Five first sensors (11
), a second sensor (11a), and a third sensor (11b)
, a fourth sensor (11c), and a fifth sensor (11d).

The regulating valve (3) is located inside the inverted conical cylinder part of the valve cylinder (12), which has a cylindrical part that continues to the lower end of the inverted conical cylinder that is an extension of the inverted conical cylinder at the bottom of the rice polishing tank (2). A valve body (13) formed in a substantially conical shape is provided so as to be movable up and down, and a valve lever (14) is in charge of raising and lowering the valve body (13).
The middle part thereof is rotatably supported by the valve cylinder (12) (15), and its tip engages with the shaft part (13a) extending below the valve body (13). Attach the rear end of the valve lever (14) that protrudes outward from the valve barrel (12) to the outside of the valve barrel (12).
) is rotatably engaged with the lower end of an electric jack (17) supported by a support arm (16) projecting outward from the jack.

This jack (17) has the first to fifth sensors (11), (11a), (11b), (11c), (1
1d), the valve main body (13) is raised and lowered to open and close via the valve lever (14). In the illustrated state, the jacker (17) pulls up the rear end of the valve lever (14). The valve body (13) is lowered, and its lower end is in contact with the inner circumference of the lower end of the inverted conical part of the valve barrel (12) to prevent the rice grains from flowing down in the rice milling tank (2). During rice milling, the valve body (
13) moves up and down to adjust the gap with the inner periphery of the valve cylinder (12), allowing the rice grains in the rice milling tank (2) to flow down in appropriate amounts one by one from the inlet (9) into the milling room (1) at all times. It is supplied to maintain the quantity.

(18) is a resistance lid, which is provided outside the discharge port (10) to regulate the amount of rice grains discharged from the discharge port (10), and is equipped with a weight (19);
By moving the position of this weight (19), the pressure by which the rice grains in the milling chamber (1) push open the resistance lid (18) changes, and the amount of discharge is adjusted.

Push open this resistance lid (18) to access the whitening chamber (
The mixture of rice grains and bran discharged from the outlet (1) is discharged from the outlet (1).
0) to the upper end of the sieve (4) which is installed at an angle through a discharge tube (20) that reaches the upper end of the sieve (4);
The rice grains and bran are separated as they flow down a vibrating sieve (4) by a vibrating electric motor (21), and only the rice grains are lifted from the bottom end of the sieve (4) by an elevator (not shown) incorporating a conveyor and polished. The rice is returned to the tank (2), flows into the polishing room (1) again, and is repeatedly polished until a predetermined rice polishing ratio is reached.

Next, a control method for constantly maintaining the amount of rice grains accumulated in the milling room (1) at an amount that allows high rice milling efficiency will be explained. FIG. 2 is a block diagram showing a control system that maintains the amount of rice grains accumulated in the milling room (1) at an amount that allows high milling efficiency at all times, and includes the first to fifth sensors (11), (
When 11a), (11b), (11c), and (11d) detect the amount of rice in the milling room (1), the opening degree of the regulating valve (3) can be set using the specified sensor. ) is the standard opening, and the sensor one step below the specified sensor opens slightly larger than the standard opening, and conversely, the sensor one step above the specified sensor opens slightly smaller than the standard opening. It is set to be irrelevant. and,
The sensor specified as standard is usually the third sensor (1
1b), the second sensor (11a) is designated if a larger grain amount is better depending on the rice milling conditions, and the fourth sensor (11c) is designated if a smaller grain amount is better.

After starting the vertical rice milling machine and rotating the milling trochanter (7) to a predetermined rotation speed, the sensor designating means (A) built into the control panel (not shown) controls the milling room ( 1
), for example, the third sensor (11b) is designated as the position for obtaining the amount of rice grains accumulated in the area.

When one of the five sensors is designated in this way, the controller (B) commands the regulating valve (3) to fully open, and the jack (17) opens the valve body via the valve lever (14). (13), lift the valve body (13) and the valve barrel (
There is a large gap between the inner periphery of rice polishing tank (2) and rice polishing tank (2).
The rice inside flows into the milling room (1) through this gap (9)
A large amount flows down from the

[0018] The discharge port (10) of the whitening chamber (1) has a resistance lid (
18), rice grains begin to accumulate in the milling room (1) and reach the lowest sensor (11d).
), this fifth sensor (11d) detects rice, but the regulating valve (3) remains inactive and remains as it is, and when the amount of rice increases further and reaches the fourth sensor (11c), the regulating valve (3) detects the rice.
3) is slightly closed and the opening is slightly larger than the standard opening, and the rice grain amount continues to increase, and the designated third sensor (11
When b) is reached, the regulating valve (3) is further closed to the standard opening degree, and the inflow amount of rice is slightly reduced to the standard inflow amount.

[0019] Although the operation continues at this standard inflow rate, if the amount of rice grains in the milling room (1) increases or decreases little by little, the on-off valve (3) closes slightly when it increases and reaches the second sensor (11a). When the flow rate of rice grains decreases slightly, on the contrary, when it decreases and reaches the fourth sensor (11c), the on-off valve (3) opens slightly and the flow rate of rice increases slightly. 3 sensor (11b).

[0020] Therefore, the amount of rice grain in the milling room (1) is
Based on the position of the sensor (11b), the third sensor (1
1b) and the second sensor (11a), or between the third sensor (11b) and the fourth sensor (11c), and is automatically controlled to an approximately ideal state.

[0021]

[Effects of the Invention] According to the automatic milling chamber inflow control device of the vertical rice milling machine according to the present invention as described above, a plurality of sensors for detecting the amount of rice grains are provided in the milling chamber at different positions vertically. By adjusting the amount of rice grains flowing into the milling room from the rice milling tank using a sensor, it is possible to automatically maintain an almost ideal amount of rice grains in the milling room that provides high milling efficiency at all times.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional, partially cutaway side view of a main part showing an embodiment of the present invention.

FIG. 2 is a block diagram showing the automatic control method of the present invention.

[Explanation of symbols]

1. Whitening room 2　Rice milling tank 3 Adjustment valve 4 Sieve 5　Sperm chamber shell body 9 Inlet 10　Discharge port 11 First sensor 11a Second sensor 11b Third sensor 11c 4th sensor 11d 5th sensor 12 Valve tube 13 Valve body 17 Jack

Claims (1)

[Claims] Claim 1: A vertical rice milling machine equipped with an automatically adjustable regulating valve near the upper end of the milling chamber for adjusting the amount of rice grains flowing into the milling chamber, wherein the amount of rice grains in the milling chamber is detected. An automatic milling chamber inflow control device for a vertical rice milling machine, characterized in that a plurality of sensors for controlling the opening and closing of the regulating valve are arranged in the milling chamber at different vertical positions.