JPH0634934B2 - Supply amount control device for paddy sorting machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a hulling and sorting machine that guides mixed rice detreated by derolling to a rotary sorting cylinder and sorts it into paddy and brown rice.

(Prior Art) As a device of this type, a layer thickness sensor for detecting the layer thickness of the mixed rice staying in the rotary sorting cylinder is provided, and a main hopper for supplying paddy to the derolling roll in accordance with the output of this sensor. It is known that the supply amount control valve is opened and closed to adjust the paddy supply amount so that the layer thickness of the mixed rice in the rotary sorting cylinder becomes constant.

(Problems to be solved by the invention) By the way, when the finishing rice control valve provided in the rotary sorting cylinder is raised to lower the work efficiency, the amount of the finished rice discharged is reduced and the mixed rice in the rotary sorting cylinder is reduced. Since the layer thickness becomes large, the supply amount control valve is closed by the function of the layer thickness sensor to reduce the supply amount of new paddy.

However, in such a state where the work efficiency is lowered, the amount of the finished rice collected in the rotary sorting cylinder decreases more and more, so that the layer thickness of the mixed rice tends to increase. As a result, the amount of reduced paddy that is reduced from the rotary sorting cylinder to derolling tends to increase, and in this reduced paddy there is a considerable amount of brown rice in addition to the paddy, and this brown rice is rubbed twice, There has been a problem that a problem such as skin misalignment is caused and that the control of the amount of paddy supplied to the rotary selection cylinder is not appropriate.

Therefore, it is an object of the present invention to optimize the supply amount control, to improve the efficiency of the supply amount control, and to prevent double sliding and skin shift.

(Means for Solving Problems) In order to achieve this object, the present invention has the following configuration.

That is, the present invention, de-rolling the paddy from the main hopper provided with a supply amount control valve for opening and closing the discharge port by de-rolling, the mixed rice after the de-treatment is sorted by a rotary sorting tube, the selected. In a paddy sorting machine that discharges the finished rice outside the machine and deprocesses the reduced paddy again by the derolling, a finished rice amount sensor that detects the amount of the finished rice discharged, and a reduction amount of the reduced paddy is detected. A reduced paddy amount sensor, and a feed amount control valve control means for opening and closing the feed amount control valve so that the ratio of the detected value of the finished rice amount sensor and the detected value of the reduced paddy amount sensor becomes a predetermined value. It will be provided.

(Operation) The present invention is based on the finding that, as described later, if the ratio between the amount of reduced paddy and the amount of finished rice is controlled, it can be suppressed twice within the allowable range of sliding.

Therefore, the amount of finished rice is detected by the amount of finished rice 9 and the amount of reduced paddy is detected by the amount of reduced paddy sensor 10, and rotation is performed so that the ratio of these detected values becomes a predetermined value at which sliding is allowed twice. The supply amount of the mixed rice to the sorting cylinder 5 is controlled.

Therefore, when the ratio of the amount of reduced paddy to the finished rice is larger than the appropriate value, the supply amount control valve 5 is closed to reduce the supply amount, and thereby the amount of reduced paddy Q ₂ is decreased to reduce the ground rice twice. .

On the other hand, when the ratio of the amount of reduced paddy is smaller than the appropriate value,
The supply amount control valve 5 is opened to increase the supply amount, whereby the amount of finished rice is increased to the extent that double sliding is allowed.

(Embodiment) Prior to the description of the configuration of an embodiment of the present invention, the reason for configuring as described below will be described with reference to FIG.

In the paddy sorting machine according to the present invention, as shown in FIG. 1, most of the brown rice is supplied from the main hopper 1 for housing the paddy and out of the mixed rice of the paddy and the brown rice detreated by the derolling 2. Is collected as finished rice in the rotary sorting cylinder 3 and discharged to the outside of the machine. On the other hand, a part of the brown rice in the rotary sorting cylinder 3 is reduced to the auxiliary hopper 4 as reduced brown rice and is de-treated by the derolling roll 2 again, so that the reduced brown rice is rubbed twice.

Therefore, if the ratio of the reduced brown rice to the whole brown rice immediately after processing in the derolling 2 is defined as the degree of double sliding E, this is calculated by the following procedure.

Assuming now that the ratio of brown rice in the mixed rice, that is, the mixed rice loss rate is A ₀ , and the ratio of brown rice in the reduced rice, that is, the reduced rice loss rate is B ₀ , these are the following equations (1) and (2). Each is represented by a formula.

A ₀ = R ₀ / Q ₀ = R ₀ / (R ₀ + P ₀ ) (1) B ₀ = R ₂ / Q ₂ = R ₂ / (R ₂ + P ₂ ) ≈R ₂ / (R ₂ + P ₀ ) ( 2) Here, Q ₀ , R ₀ , P ₀ , Q ₂ , R ₂ and P ₂ in the above formula are as follows.

Q ₀ : amount of mixed rice R ₀ : amount of brown rice in mixed rice P ₀ : amount of paddy in mixed rice Q ₂ : amount of reduced paddy R ₂ : amount of brown rice in reduced paddy P ₂ : amount of paddy in reduced paddy Also, From the expressions (1) and (2), the following expressions (3) and (4) are obtained.

Q ₀ (1-A ₀ ) = P ₀ (3) Q ₂ (1-B ₀ ) = P ₂ = P ₀ (4) Therefore, the double sliding ratio E is calculated by the formulas (1) to (4). It is calculated by the following equation (5).

_{E = R 2 / R 0 =} Q 2 / Q 0 × B 0 / A 0 = 1-A 0/1-B 0 × B 0 / A 0 (5) (5) According to the equation, 2 Dosuriritsu E is represented by the mixed rice loss rate A ₀ and the reduced paddy loss rate B ₀ .

Generally, it is considered that the 2nd degree of sliding ratio E is 10% or less.
This is because the proportion of brown rice that is re-reconstituted becomes 1% or less.

Therefore, the mixed rice removal rate A ₀ is 85%, and the 2 degree sliding rate E is 10%.
In order to make the ratio equal to or less than%, the reduced paddy loss rate B ₀ needs to satisfy the following expression (6) from the expression (5).

B ₀ <0.36 (6) Therefore, it can be said that the reduced paddy removal rate B ₀ is preferably 36% or less.

Next, when the ratio of the amount of reduced paddy Q ₂ to the amount of finished brown rice R ₁ is S, this ratio S is obtained by the following calculation formula.

First, the amount R ₂ of brown rice in the reduced paddy is as follows.

_{R 2 = R 0 -R 1 =} R 2 / E-R 1 (7) Further, the equation (7) can be modified as equation (8).

_{R 1 = R 2 / E-} R 2 = R 2 (1 / E-1) = R 2 × (1-E) / E (8) and (8) becomes as expression (9).

R ₂ = R ₁ × E / (1-E) (9) On the other hand, the amount of paddy P ₀ in the mixed rice is given by the following formula.

_{P 0 = (1-A 0} ) / A 0 × R 0 = (1-A 0) / A 0 × R 1 / (1-E) = R 1 × (1-A 0) / A 0 × 1 / (1-E) (10) Furthermore, the amount P ₂ of paddy in the reduced paddy is given by the following equation.

P ₂ = P ₀ = R ₁ (1-A ₀ ) / A ₀ × 1 fall (1-E) (11) Therefore, the ratio S between the amount of reduced paddy Q ₂ and the amount of finished brown rice R ₁ is
From the expressions (9) and (11), the following expression is obtained.

_{S = Q 2 / R 1 =} (P 2 + R 2) / R 1 = 1 / R 1 {R 1 (1-A 0) / A 0 (1-E) + R 1 E / (1-E)} = (1-A ₀ ) / A ₀ (1-E) + E / (1-E) (12) Therefore, according to the equation (12), the ratio S is the mixed rice loss ratio A.
₀ and the sliding rate E. For example, if the mixed rice loss rate A ₀ is 85%, and the sliding rate E is 10%, the ratio S is S = 0.3, and the amount of reduced paddy Q ₂ is Finished brown rice amount R
_It is considered that the limit is about 30% of ₁ and the double sliding is allowable.

Further, according to the equation (12), the double-grinding E can be estimated from the mixed rice desorption rate A ₀ and the ratio S between the reduced paddy amount Q ₂ and the finished brown rice amount R ₁ .

Therefore, in the present invention, if it is assumed that only the discharge efficiency of the finished rice discharged from the rotary sorting cylinder is changed without changing the mixed rice removal rate A ₀ during the work, this ratio S can be determined by detecting only the ratio S. This is based on the finding that the two-fold sliding ratio E can be controlled within the allowable range if controlled.

Next, an embodiment of the present invention constructed based on the knowledge will be described with reference to FIGS. 1 and 2.

The main hopper 1 is provided with a supply control valve 5 for adjusting the amount of paddy supplied at its outlet, and the supply control valve actuator 6 opens and closes the control valve 5. Left and right pair of derolling 2,
2, the derolling actuator 7 adjusts the gap.

A brown rice collecting trough (not shown) for collecting the finished rice is provided in the rotary sorting cylinder 3, and a finishing rice control valve 8 for adjusting the rate of the finished rice is provided along the edge of the trough.

A finished rice amount sensor 9 for detecting the flow rate of the finished rice per unit time is provided in the discharge passage of the finished rice discharged from the rotary sorting cylinder 3 to the outside of the machine. In addition, from the rotary selection cylinder 3 to the auxiliary hopper 4
A reduction paddy quantity sensor 10 for detecting the flow rate of the reduction paddy per unit time is provided in the reduction paddy of the reduction paddy that returns the paddy.
A supply rate sensor 11 for detecting the removal rate of the mixed rice processed in the derolling roll 2 is provided in the supply path for supplying the mixed rice into the rotary selection cylinder 3.

In FIG. 2, reference numeral 20 denotes an input interface, which receives output signals from the finished rice amount sensor 9, the reduced paddy amount sensor 10, and the loss rate sensor 11 and supplies them to the microcomputer 21. The microcomputer 21
For example, various judgments are performed as shown in FIG. 3, and each component is controlled based on the result.

An output interface 22 connects an actuator drive circuit 23 for driving the supply amount control valve actuator 6 and an actuator drive circuit 24 for driving the derolling actuator 7.

Next, an example of the operation of the embodiment of the present invention thus configured will be described with reference to FIG.

Now, it is assumed that the operator sets the mixed rice removal rate and the sorting efficiency of the rotary sorting tube 3 arbitrarily before the operation. Then, the operation is started, and during the operation, the supply amount control according to the present invention as shown in FIG. 4 is performed.

First, the finished rice amount sensor 9 detects the amount of finished rice R ₁ discharged from the rotary sorting cylinder 3 to the outside of the machine (step S
1), the amount of reduced paddy sensor 11 detects the amount of reduced paddy Q ₂ returned from the rotary sorting cylinder 3 to the auxiliary hopper 4 (step S).
2).

Then, from these detected values, the amount of reduced paddy Q ₂ and the amount of finished rice R ₁
Find the ratio S between a predetermined value the ratio S 2 retouching is allowed, for example, mixed rice supply amount such that the 1/3 Q _{0 (Q
0} = R ₁ + Q ₂ ) is controlled (steps S3 to S7).

That is, the ratio S of the amount of reduced paddy Q _{2 to} the amount of finished rice R ₁
Is larger than the appropriate value, the supply amount control valve 5 is operated in the closing direction to reduce the supply amount Q ₀ of the paddy from the main hopper 1, thereby reducing the amount of reduced paddy Q ₂ and slicing the rice twice. To reduce.

On the other hand, when the ratio S of the reduced paddy amount Q ₂ is smaller than the appropriate value, the feed amount control valve 5 is operated in the opening direction to increase the paddy feed amount Q ₀ from the main hopper 1, thereby sliding twice. The amount of finished rice R ₂ is increased to the extent that is allowed.

Therefore, according to the present embodiment, even when the efficiency of the sorting work is low, the supply control to the rotary sorting cylinder is appropriate, the efficiency is improved, and the double sliding is prevented within the minimum limit. be able to.

(Effects of the Invention) As described above, in the present invention, based on the finding that the degree of reduced paddy and the amount of finished rice can be controlled to make the sliding twice within an allowable range, the reduced paddy amount and the finished rice can be adjusted. The amount of rice is detected, and the supply amount control valve of the main hopper is opened and closed so that the ratio of the detected value becomes a predetermined value, so the supply amount control to the rotary sorting cylinder becomes appropriate, and thus the supply amount It is possible to improve the efficiency of control and prevent double rubbing.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention, FIG. 2 is a block diagram thereof, and FIG. 3 is a flow chart showing its control procedure. 1 is a main hopper, 2 is a derolling roll, 3 is a rotary sorting cylinder, 5 is a supply amount control valve, 9 is a finished rice amount sensor, and 10 is a reduced paddy amount sensor.

Claims (1)

[Claims] Claims: 1. The paddy from the main hopper provided with a supply amount control valve for opening and closing the discharge port is derolled, and
The mixed rice after the detreatment is sorted by a rotary sorting cylinder, and the finished rice thus sorted is discharged to the outside of the machine, and at the same time, in the hulling and sorting machine that de-processes the reduced paddy by the derolling, the discharge of the finished rice. Finished rice amount sensor for detecting the amount, reduced paddy amount sensor for detecting the reduced amount of the reduced paddy, and the ratio of the detected value of the finished rice amount sensor and the detected value of the reduced paddy amount sensor becomes a predetermined value And a supply amount control valve control means for opening and closing the supply amount control valve.