JPH0718128B2 - Material crushing equipment control device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a raw material crushing equipment control device in a raw material transportation equipment such as earth and sand.

[Conventional technology]

FIG. 2 is a block diagram showing the configuration of a conventional material crushing equipment control device of this type, for example, in which 1 is a loading hopper, 2 is a loading truck for loading a material into the loading hopper 1, and 3 is a Input material 4, a crusher for crushing the input material 3 to a predetermined size, 5 a crusher motor,
6 is a hopper for temporarily storing the input raw material 3 after being crushed,
7 is a raw material, 8 is a feeder that cuts from the hopper 6 at a predetermined speed, 9 is the feeder motor, 10 is a downstream conveyor, 11 is an input switch for the feeder motor 9, 12 is also a cut switch, and 13 is a low switch of the hopper 6. Level sensor, 14 is the same contact, 15 is an electromagnetic contactor coil, 16 is an electromagnetic contactor main contact, 17
Is an electromagnetic contactor auxiliary contact, 18A is a speed setter for setting a speed in advance, 19A is a speed detector axially mounted on the feeder motor 9, and 20A is a speed comparator to generate a speed command. 21A is a speed command control circuit, 22 is a speed control main circuit, 23
Is an ON switch, 24 is an OFF switch, 25 is a high level sensor provided in the hopper 6, 26 is an output contact of the high level sensor,
27 is an electromagnetic contactor coil, 28 is an electromagnetic contactor main contact, and 29 is an electromagnetic contactor auxiliary contact.

Next, the operation will be described. First, the landfill earth and sand collected in the mountain area is transported to a predetermined collection place by the input truck 2 or the like. Transfer from the collection area to a large long-distance conveyor,
It will be transported to the loading dock on the coast and then transferred to a landfill by a barge. Equipment for that purpose is installed in various places in the loading dock. Further, a crusher 4 (crushing equipment) for arranging the earth and sand into particles having a size smaller than a predetermined size, a feeder equipment for cutting out a certain amount to the downstream conveyor 10 and the like are provided at the loading point on the loading truck 2.

In this case, as shown in FIG. 2, the crusher 4 temporarily receives the input raw material 3 input from the input truck 2 in the input hopper 1, drives the crusher motor 5 to crush it, and then moves it to the next hopper 6. List. The feeder 8 is provided below the hopper 6 and its rotational speed is controlled by a variable speed feeder motor 9. The speed of the feeder motor 9 is set in advance by the operator using the speed setter 18A.

Hereinafter, based on the set value of the speed setter 18A, the actual rotation speed, that is, the speed detector 19A and the comparator 20A constitute a control system of the feeder motor, and so-called feedback control is performed.

The crusher motor 5 described above is continuously operated unless the output contact 26 of the high level sensor 25 of the lower hopper 6 operates. The operation of the feeder motor 9 is continued unless the contact 14 of the low level sensor 13 of the hopper 6 is inoperative. In this way, the contact of each level sensor is used as an interlock of the control circuit so that the operation can be continued individually.

[Problems to be Solved by the Invention]

Since the conventional material crushing equipment control device is configured as described above, the crusher operation and the feeder operation are operated at constant speed by using the signals from the material level sensor in the hopper as the minimum interlock. Therefore, the control device is continuously operated regardless of the storage amount of the hopper, and there is a problem that it is not always an economical operating method.

The present invention has been made in order to solve the above problems, and obtains a raw material crushing equipment control device that enables variable speed operation of a crusher motor and performs speed control in consideration of the respective raw material levels of a charging hopper and a feeder hopper. The purpose is to

[Means for Solving the Problems]

The raw material crushing equipment control device according to the present invention has an upstream hopper and a downstream hopper, and feeds raw material in the upstream hopper into the downstream hopper by driving dedicated upstream and downstream motors, respectively, to comprehensively and efficiently transfer the raw material. In this case, the raw material storage amount in the upstream and downstream hoppers is detected by the upstream and downstream hopper storage amount detection means, and the optimum relationship between the detected raw material storage amount and the rotation speeds of the upstream and downstream motors. (Characteristics) are stored in the upstream and downstream signal correctors, the output signals from both of the signal correctors and the speed of the upstream motor are compared with the output signal from the preset speed setter in a comparison circuit, and the upstream motor Is controlled at a variable speed.

[Action]

The upstream and downstream signal compensators according to the present invention detect the raw materials stored in the upstream and downstream hoppers by the upstream and downstream hopper storage amount detecting means, respectively, and output signals from both the storage amount detecting means and the upstream and downstream hoppers. By storing in advance a comprehensive high-efficiency material transfer relationship (characteristic) with the respective rotation speeds of the motors, the output signals of the both signal compensators and the output of the speed setting device for predetermining the speed of the upstream motor are stored. The upstream motor is subjected to variable speed control by adding with an adder in order to derive a comprehensive optimum condition with the signal.

Example of Invention

An embodiment of the present invention will be described below with reference to the drawings. In the figure,
The same parts as those in FIG.
In the figure, 30 is a load cell as a storage amount detecting means in the crusher hopper provided in the charging hopper (upstream hopper) 1, 31 is a signal generator for converting the signal of the load cell 30 into an electric signal, and 32 is the same figure. Input hopper 1 as shown in (b)
Signal compensator for compensating the speed command in accordance with the level of 33, 33 is a load cell as the storage amount detecting means in the feeder hopper of the hopper (downstream hopper) 6, 34 is a signal generator, 35
Is a signal compensator shown in FIG. 3C, 36 is a comparison circuit for comparing the output signal of the speed setter 18B with the output signals of the signal compensators 32 and 35, and 37 is the speed control main circuit for the crusher motor 5. .

Next, the operation will be described. First, it is economically and efficient to basically rotate the crusher motor 5 promptly when the input material 3 in the upper input hopper 1 is large, and slowly crush it when the input material 3 is small. Can be said to be a typical driving method. In addition, the crusher motor 5 is controlled to perform a small amount of crushing work when the amount of raw material 7 is large and a large amount of crushing work when the amount of raw material 7 is small with respect to the state of the amount of raw material stored in the hopper 6 below the input hopper 1. Can be said to be a preferable control method from the balance of the entire system. That is, the optimum crushing capacity is determined in advance as shown in FIGS. 1 (b) and (c) according to the raw material storage amounts of the upper and lower two hoppers, and the signal compensator is set.
Stored in 32 and 35 as hopper-dedicated material level and motor speed characteristics. Then, by adding these two dedicated characteristics, the combined correction is added to the preset value of the speed setter 18B, so that proper control as a system becomes possible. Then, the value of the set value SV in the feedback control is output from the comparison circuit 36, and the set value MV to the speed command control circuit 21B is supplied to the comparator 20B by giving this output and the output from the speed detector 19B to the comparator 20B. Output from the crusher motor 5 and input to the speed control circuit 37 to control the crusher motor 5 at a variable speed.

In the above embodiment, each hopper was provided with a load cell as a storage amount detecting means in the hopper to control the weight value of the raw material by replacing it with the storage amount level of the hopper, but other level detecting devices such as a depth measuring device were used. However, the same effect as that of the above-described embodiment may be obtained.

Further, in this embodiment, the case where the crusher motor is controlled at a variable speed in consideration of the storage amount of the upper and lower two hoppers has been described, but the present invention is not limited to this, and the level value of only the upper hopper is controlled. May be used as an interface signal for

Further, the configuration of the signal corrector is not particularly limited as long as it has a memory or a similar function.

Further, although the present invention has been described with respect to the case of being applied to the control of the material crushing equipment, the present invention is not particularly limited to this, and the storages are arranged in series and are applied to a system that determines the processing capacity from the front and rear storage relationships. By doing so, the same effect as that of the above embodiment can be obtained.

〔The invention's effect〕

As described above, according to the present invention, when the raw material stored in the input hopper is crushed by the crusher, and subsequently the crushed raw material is received by the hopper at the subsequent stage, when it is cut again by the feeder, the storage amount level in both hoppers is reduced. The height of the crusher motor is detected by the storage amount detecting means in the hopper, and in addition to the preset speed setting signal of the crusher motor, the rotation speed of the crusher motor is further determined from the optimum relationship between the level height of the storage amount in both hoppers and the rotation speed of the crusher motor. Since it is automatically corrected, the rotation speed of the crusher is comprehensively and automatically controlled according to the storage amount in each hopper of the crusher and the feeder, and the equipment with the most efficient raw material processing efficiency is operated. There is an effect that can be.

[Brief description of drawings]

FIG. 1 (a) is a block diagram of a raw material crushing equipment control device according to an embodiment of the present invention, FIGS. 1 (b) and (c) are characteristic diagrams of a signal compensator, and FIG. 2 is a conventional raw material crushing equipment control. It is a block diagram of an apparatus. In the figure, 1 is a charging hopper (upstream hopper), 3 is a charging material, 5 is a crusher motor (upstream motor), 9 is a feeder motor (downstream motor), 30 is a load cell (upstream hopper storage amount detecting means), and 32 is Reference numeral 33 is a signal corrector (upstream signal corrector), 33 is a load cell (downstream hopper storage amount detecting means), 35 is a signal corrector (downstream signal corrector), and 36 is a comparison circuit. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A raw material crushing facility control device for transferring a raw material input in an upstream hopper into a downstream hopper by driving a dedicated upstream motor and a dedicated downstream motor, and controlling the amount of raw material stored in the upstream hopper and the downstream hopper. The upstream hopper storage amount detecting means and the downstream hopper storage amount detecting means for detecting, and the upstream signal correction in which the relationship between the raw material storage amount output from the upstream hopper storage amount detecting means and the rotation speed of the upstream motor is stored in advance. And a downstream signal corrector that stores in advance the relationship between the rotation speed of the downstream motor and the raw material storage amount output from the storage amount detecting means in the downstream hopper, and a speed setting device that presets the speed of the upstream motor. , The output signals output from the upstream signal corrector, the downstream signal corrector and the speed setter are compared to output the set value in feedback control. And a second comparison circuit that compares the set value with the detected value of the speed detector and outputs the set value to the speed command control circuit, and inputs the set value to enable the crusher motor. A raw material crushing equipment control device, comprising: a speed control circuit for controlling a shift.