JPH0255111B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a control device for a rotary sorter.

Conventionally, rotary sorting machines, especially grain sorting machines, have a rotatable sorting tube with a number of recesses on its inner circumferential surface, and a gutter is installed therein, and the sorting tube is rotated slowly. A mixed rice mixture of paddy and brown rice is supplied from one end of the cylinder and flows in the axial direction inside the sorting cylinder. In the middle of the flow, the mixed rice tries to be scooped up as the sorting tube rotates, but the brown rice sinks and gets stuck in the dent, and after being lifted upwards, it falls in a large parabola. On the other hand, the paddy is also scooped up, but since it does not fit into the dent, it falls in a small parabola. A drain is installed at the point where the brown rice falls, so the paddy and brown rice are separated.

On the other hand, sorting performance depends on various factors,
In particular, it largely depends on the number of rotations of the sorting cylinder. That is, as the rotational speed changes, the effect of scooping up the dents increases, the parabola of brown rice changes greatly, and the sorting performance and processing capacity are affected.

Therefore, an object of the present invention is to improve the sorting performance by controlling the rotation speed of the sorting tube in the rotary sorter.

Embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 shows a cross section of the entire hulling machine. The hulling machine A has a hulling section C placed on one side of the upper surface of the wind sorting section B, which is a rectangular box, and a rotary sorting machine D placed side by side. They are placed to form the whole.

Wind sorting section B has a No. 2 conveyor 1, a mixed rice conveyor 2, a brown rice conveyor 3, etc. installed in parallel. Since a suction dust extractor 4 is provided at one end in the longitudinal direction of the wind selection section B, and an intake port 6 is provided at the other end in the longitudinal direction,
The sorting air is made to flow above each of the conveyors 1, 2, and 3 in the direction shown by the broken line.

The hulling section C has a pair of de-rolls 9 installed therein, a hopper 10 is provided above them, and the mixed rice conveyor 2 is positioned below the de-rolls 9. The unrolling 9 is driven by a motor _M1 built in the wind selection section B via a suitable transmission means.

On the machine side, there are mixed rice conveyor 2 and brown rice conveyor 3.
A mixed rice thrower 12 and a brown rice thrower 13 are provided which communicate with each other.

The rotary sorting machine D has two sorting cylinders arranged horizontally in a box-like case 14, which are arranged in two stages, upper and lower. The axial direction of these sorting tubes is
It is arranged to be perpendicular to the axis of the de-rolling 9 in . The sorting tube has a large number of hemispherical recesses 15 large enough for brown rice to fit into, and is provided over the inner circumferential surface. A letter-shaped receiving trough 17 for receiving brown rice is inserted and suspended horizontally.
A screw conveyor 18 is housed in the receiving gutter 17.

In addition to the receiving gutter 17, an upper body screw conveyor 19 is arranged in parallel to the upper sorting tube. A supply tank 1 in which the upper end of the mixed rice thrower 12 is provided is provided on the hulling section C side of the upper screw conveyor 19.
2'.

The lower sorting tube communicates with the terminal end of the receiving gutter 17 inside the sorting tube, and further sorts the grains sorted by the sorting tube.

Since the structure is as described above, the operation using this rotary sorting and hulling machine will be explained as follows. (lifted by hand and fed), the mixed rice of paddy and brown rice is removed by the huller C, and the mixed rice of paddy and brown rice is wind sorted in the wind sorting part B and sent to the mixed rice conveyor 2.
The mixed rice is thrown up into the supply tank 12' by the mixed rice thrower 12, and is supplied from the tank 12' into the upper screw conveyor 19, which transports the rice upward in FIG. After being transferred to the right end of the sorting tube, it is supplied to the inner surface of the sorting tube. Since the sorting tube rotates under control as described below, the mixed rice is piled up on the inside of the sorting tube and is about to be scooped up, but the brown rice is stuck in the recess 15 and is placed higher than the paddy. It is lifted and falls into the receiving gutter 17 while drawing a parabola. Although the paddy is also scooped up, it falls back onto the inner surface of the sorting tube and is returned to the hopper 10 from the left end of the sorting tube.

On the other hand, the brown rice that has fallen into the receiving gutter 17 of the sorting tube is fed by the screw conveyor 18 in the receiving gutter 17 to the sorting tube located below the end of the conveyor, and the brown rice with some paddy in it is returned to the lower sorting tube. There, they are subjected to the same sorting action as in the upper sorting tube, and then carefully selected.

The paddy that has not been scooped up in the sorting cylinder (some brown rice is also mixed in) is supplied onto the mixed rice conveyor 2 again. On the other hand, the brown rice scooped up by the sorting cylinder falls onto the brown rice conveyor 3 while being subjected to the wind sorting action, and is carried out of the machine.

Here, as shown in FIG. 2, the present invention provides a receiving gutter 17 that is inserted into the upper sorting tube and suspended horizontally, and a pair of receiving side plates 20 and a receiving collecting plate 21 that extend diagonally upward. Count sensors 22 capable of counting grains are provided on the collecting plate 21 in two stages, upper and lower. As shown in FIG. 3, the signal obtained by the count sensor 22 is sent to the interface 24 by the processing section 23 consisting of a microprocessor when a certain count is performed per unit time. This activates the control section 25 to control the rotational speed of the motor _M2 that rotates the sorting tube shown in FIG.

That is, when the switch is turned on for work, the motors M ₁ and M ₂ are started, and the motor M ₂ rotates the sorting cylinder via the pulley 26 . Motor _M2 is a variable speed control motor for the sorting tube, and is set so that the lower limit of rotation speed that can be sorted is always obtained when the switch to start work is turned on. Due to the release, the mixed rice is supplied to the upper sorting cylinder, the brown rice draws a parabola and begins to hit the receiving collecting plate 21, and when the grains are counted by the lower counting sensor 22, the motor M ₂ Increase the rotation speed to increase the amount of brown rice scooped up. As the rotation speed of the sorting cylinder increases, the parabola of the brown rice becomes larger, and when it hits the upper count sensor 22, the rotation speed of the motor _M2 is maintained as it is.

Therefore, the sorting tube can maximize its throughput while maintaining good sorting performance.

As a second embodiment, a mixed rice sensor 27 is also suspended from the lower surface of the receiving gutter 17 instead of the lower count sensor 22 (see Fig. 2), and the mixed rice is transferred to the upper sorting tube by release. When the mixed rice is fed and deposited, it is detected by the mixed rice sensor 27 and the rotation speed of the motor _M2 is increased.

As a third embodiment, as shown in FIG. 4, a count sensor 22 is provided only in the upper stage, and an alarm lamp or buzzer 28 is provided in the control circuit. At the start of work, the rotation speed of the sorting tube is set to the lower limit and the separation begins. Since the rotation of the sorting tube is low, the sorting accuracy is good, but the throughput is small. At this time, the brown rice parabola is low and does not hit the count sensor 22, so that the alarm lamp 28 is turned on. While the lamp 28 is on, the rotation speed of the motor M ₂ is gradually increased manually. When the alarm lamp 28 goes out, the rotation speed of the motor _M2 is maintained as it is.

In summary, the present invention provides a rotatable sorting tube with a large number of recesses on its inner circumferential surface, and a receiving gutter is provided therein, a mixture is supplied from the end of the sorting tube, and the selected material is received in the receiving gutter. This is a control device for a rotary sorting machine in which a selected material detection sensor is provided on the collecting plate of the receiving gutter, and the rotation speed of the sorting tube is controlled by the sensor. play.

(1) Since the state of the parabola of the selected material is detected by the selected material detection sensor, good sorting performance can be maintained.

(2) Since the rotation of the sorting cylinder is controlled by the selected material detection sensor, processing capacity can be increased.

[Brief explanation of drawings]

Fig. 1 is an overall cross-sectional view of a rice huller that is an embodiment of the present invention, Fig. 2 is a view taken in the direction of the ~ arrow in Fig. 1, Fig. 3 is a circuit diagram, and Fig. 4 is a ~ arrow in Fig. 1. 3 shows a third embodiment in a perspective view. 15...dent, 17...receiving gutter, 21...receiving collection board,
22... Count sensor,... Sorting tube, M ₂
…motor.

Claims (1)

[Claims] 1. A rotary sorting machine in which a receiving gutter is installed inside a rotatable sorting cylinder with a number of recesses on the inner circumferential surface, a mixture is supplied from the cylinder end of the sorting cylinder, and the selected material is received in the receiving gutter. A control device for a rotary sorting machine, wherein a selected object detection sensor is provided on the receiving collecting plate of the receiving gutter, and the rotation speed of the sorting cylinder is controlled by the sensor.