JPH02282106A - Control device for cutting out and conveyance of raw material - Google Patents

Abstract

PURPOSE:To improve the conveyance efficiency in the above device for earth and sand and the like by detecting a conveying quantity on the position coming near to the cutting out side keeping a prescribed distance apart from the sending out end of a cutting out conveyor, and averaging a sending out quantity through controlling the conveyance speed at a transfer point to a sending out conveyor so as to be realized as follows; conveying quantity X speed = constant. CONSTITUTION:A conveying quantity Qn is detected with a conveying quantity measuring instrument 12 on the position coming near to the inlet side by L from the outlet of a cutting out conveyor 5, and input to a computing device 15. The speed Vn of a conveyor driving motor 7 is detected with a speed detector 10, and input to the computing device 15. The conveying quantity Qn and the speed Vn are sampled at a prescribed sampling period, the time required raw material 5 for running the distance L is computed, after computing of the time the transfer speed of the conveying quantity at the transfer point to a sending out conveyor 6 is searched, and output as a speed indicated value Vs to a control device 9. By this constitution, the sending out quantity can be averaged.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a cut-out transport control device for earth and sand, raw materials, etc. FIG. Receiving tank (hopper), IA is the raw material, 2 is the raw material transport truck 1, 2A is the raw material being put into the receiving tank, 3 is the receiving tank 1
4 is a storage tank for storing the crushed raw material 4A, 5 is a cutting conveyor,
5A is the raw material on the cutting conveyor 5, 6 is the delivery conveyor, 6A is the raw material on the delivery conveyor 6, 7 is the drive motor of the cutting conveyor 5, 8 is the control device for this drive motor 7,
9 is a power source, 10 is a speed detector that detects the speed of the drive motor 7 and feeds it back to the control device 8, and 11 is a speed indicator operated by an operator.

In this configuration, since the truck 2 is used to transport the raw material to the receiving tank 1, the raw material is brought into the receiving tank 1 intermittently, but the raw material is continuously cut out from the storage tank 4.
In order to improve the transport efficiency of the delivery conveyor 6, the speed of the cutting conveyor 5 is instructed in advance by the operator's operation of the speed indicator 11, and the drive motor is controlled so that the speed of the cutting conveyor 5 reaches this instructed speed. 7 is feedback controlled.

[Problem to be solved by the invention]

In this way, conventionally, the amount of material to be cut out is calculated based only on the speed of the drive electric motor 7, and when the material is transferred from the cutting conveyor 5 to the delivery conveyor 6, the transfer amount is measured. Therefore, there was a problem that the transport amount by the delivery conveyor 6 was not averaged, and the transport efficiency was not good.

This invention was made to solve the above problem.
It is an object of the present invention to provide a raw material cutting and transport control device that can improve transport efficiency by averaging the amount of raw materials sent out compared to conventional methods.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a transport amount detector at a predetermined distance from the raw material sending end of the cutting conveyor to the cutting side, and a speed detector that detects the speed of the transport amount detector and the cutting conveyor drive motor. A computing device is provided which introduces the output of the transportation amount detector, and this computing device simultaneously samples the transportation amount, which is the output of the transportation amount detector, and the actual speed, which is the output of the speed detector, and detects the transportation amount from both sampling values. It has a step of calculating the time required for the raw material at the point to travel the predetermined distance, and a step of calculating the speed at which the product of the transportation amount and the speed is constant, and when the calculated time has elapsed. The calculated speed is given to the control device for the drive motor as a speed command.

[Effect]

In this invention, the transport amount of the raw material that has passed a predetermined position on the cut-out conveyor is detected, and the cutting speed at which the raw material reaches the transfer point where it transfers to the delivery conveyor is determined as follows: transport amount x speed = constant. Since this is calculated in advance and this calculated speed becomes the speed command, the raw material per unit time sent to the delivery conveyor is averaged compared to the conventional method.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 12 denotes a transportation amount measuring device, and the L
(m) closer to the entrance side, and its output is converted by the signal converter 13 into a signal with a higher signal level. 14 is a signal converter that converts the output of the speed detector IO into a signal level. Reference numeral 15 denotes an arithmetic unit which takes in the outputs of the signal converters 13 and 14 and performs the arithmetic operations described below in accordance with the flow shown in FIG.

Output of transportation amount measuring device 12 (transportation amount Q) and speed detector 10
The output (speed ■) is sampled at a predetermined sampling period Ts, and the transport amount Q+, Qt, Q3...Ql
1 is sequentially stored in the shift register M1 while being postponed. At the same time, the raw material 5A measured at the measuring point is L (m)
The time T required to travel is as follows (calculated using formula 11, L/V, = T, 1...
・(1) Calculated time T, , TZ, TZ...
- T7 is stored in shift register M2. And time T, T! , T 3 ... After T7, each transport amount Q,, Qx, Q! reaches the transfer point. ...Qn transfer speed V, VS2, VSS...■3. ．． According to the following formula (2),
) is calculated, and this speed V sn is given to the control device 9 as a speed instruction value.

In this embodiment, from the cut-out conveyor 5 to the delivery conveyor 6
When the amount Q7 of raw material transferred to the feed conveyor 6 is large, the speed of the cutting conveyor 5 is reduced, and when it is small, this speed is increased. The amount is averaged compared to before.

In the above embodiment, the cutting conveyor 5 is used to cut out the raw material, but the present invention can also be applied to other cutting devices such as a rotary cutting feeder to obtain the same effect.

〔Effect of the invention〕

As explained above, this invention is configured to control the raw material speed at the material transfer point from the cutting conveyor to the delivery conveyor according to the amount of raw material, so that the amount per unit time delivered onto the delivery conveyor can be controlled. This can be averaged compared to the conventional method, and transportation efficiency can be improved.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing the operation flow of the arithmetic unit in the above embodiment, and Fig. 3 is a diagram showing the configuration of a conventional raw material cutting and transport control device. be. In the figure, 4 - storage tank, 5 - cutting conveyor, 6 -
Delivery conveyor, 7-drive motor, 9-control device, IO
--Speed detector, 11-Speed indicator, 12-Transport amount detector, 13.14--Signal converter, 15--Arithmetic device. Note that in FIG. 7, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] Raw material cutting transport control includes a raw material storage tank, a cutting conveyor that cuts the raw material from the raw material storage tank, and a delivery conveyor to which the raw material on the cutting conveyor is transferred, and performs feedback control on the speed of the drive motor that drives the cutting conveyor. In the apparatus, a transportation amount detector is provided at a position a predetermined distance from the raw material delivery end of the cutting conveyor to the cutting side, and an arithmetic device that introduces the outputs of this transportation amount detector and a speed detector that detects the speed of the drive motor. This arithmetic device simultaneously samples the transportation amount, which is the output of the transportation amount detector, and the actual speed, which is the output of the speed detector, and determines whether the raw material at the transportation amount detection point is at the predetermined value based on both sampling values. The method includes a step of calculating the time required to travel a distance, and a step of calculating a speed at which the product of the transportation amount and the speed is constant, and when the calculated time elapses, the calculated speed is adjusted to the speed of the drive motor. A raw material cutting and transport control device characterized in that a speed command is given to a control device as a speed command.