JPH0252544B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an automatic operation control method for an oscillating coarse splitter.

[Conventional technology] Most of the blast furnace slag, converter slag, electric furnace slag, etc. generated in the iron and steel manufacturing processes were disposed of by dumping. The iron content is recovered and the slag is used as aggregate.

For these reasons, the applicant first proposed that the iron content was as high as 50 to 60%, and that the dimensions were 300%.
We have developed an oscillating type rough-splitting machine that can efficiently rough-split or deform bulk furnace slag of ~500 mm or more. (Japanese Patent Application No. 59-2320 (Japanese Unexamined Patent Publication No. 60-147252))
By equipping such an oscillating rough-splitting machine with a hydraulic mechanism, the operation becomes smooth during rough-splitting or deformation of lumpy slag, and excessive load is not generated on each part of the machine, making it possible to improve its functionality. It became. (For example, Japanese Patent Application No. 108104 (1983)
No. 251941)) In the operating method of the oscillating rough-splitting machine described above, when obtaining the rough-splitting or deformation action of the lumpy slag during normal operation, a compressive force is applied to the oscillating rough-splitting plate, and the hydraulic Hydraulic pressure is generated in the hydraulic system of the mechanism, and when it is below the holding force of the hydraulic system, the rough splitting or deformation operation continues, and when the compression force is above the holding force of the hydraulic system, the block slag is compressed. Under these conditions, the oscillating rough-splitting plate was moved back to enlarge the rough-splitting gap, and under such conditions, the rough-splitting was performed and the material was discharged from the outlet of the rough-splitting chamber.

However, depending on the properties and shape of the lumpy furnace slag, even if a normal rocking motion is given to the rocking rough-splitting plate, the biting inside the rough-splitting chamber may be insufficient.
Appropriate compressive force may not be applied, and when operating under such rough cracking conditions, the contact position of the lump slag in the rough cracking chamber can be changed by expanding or contracting the rough cracking gap in stages. Then, the biting was ensured, the coarse cracking was performed under the action of sufficient compressive force, and the material was discharged from the outlet of the coarse splitting chamber.

The expansion and contraction of the rough cracking gap at this time is 1/10 to 1/5 of the initial setting period, and by changing it in stages, it is possible to eliminate the need to stop the operation of the oscillating rough cracker. The slag was continuously coarsely divided. (Japanese Patent Application No. 59-236470 (Japanese Unexamined Patent Publication No. 61-114750)) [Problems to be Solved by the Invention] However, in the above-mentioned conventional operation control method of the oscillating coarse cracker, the shape of the lumpy slag and It was not possible to reliably grasp the fluctuation tendency of the oil pressure of the hydraulic mechanism, which caused differences in the rough cutting situation depending on the properties and the compression force, so the coarse cutting gap of the oscillating rough splitting machine was expanded in stages, or There was a problem in that it was not easy to reduce the size, perform bursting, and control the operation.

The present invention solves such conventional problems, and enables automatic operation control in the process from the start of supplying the block slag to the end of discharging, and improves the rough splitting operation of the block slag. The object of the present invention is to provide an excellent automatic operation control method for an oscillating rough splitting machine.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides an oscillation system that adjusts the coarse damage gap by expanding or contracting it step by step using a hydraulic mechanism depending on the coarse cracking condition of the lumped furnace slag. In the automatic operation control method for a type rough splitting machine, the oil pressure of the hydraulic mechanism is detected and used as a variable for the rough cutting situation, and the oil pressure is compared with a set value to adjust the rough cutting gap.

[Function] The present invention has the following effects due to the above configuration.

In other words, due to the fluctuation tendency of the oil pressure of the hydraulic mechanism,
In addition to being able to accurately grasp the rough cracking status of block slag, it is also possible to adjust the rough split gap by expanding or contracting it in stages and maintain the oil pressure above the set value, making it possible to control the shape and properties of block slag. Even if there are fluctuations, the function of the coarse cutting operation can be significantly improved.

[Example] Hereinafter, implementation of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of an embodiment of the present invention.

In Fig. 1, 10 indicates the main parts of the oscillating coarse splitting machine, 1 indicates the fixed coarse splitting plate, 2 indicates the oscillating coarse splitting plate, and S indicates the fixed coarse splitting plate 1 and the oscillating rough splitting plate. This is the rough split gap formed by 2. Reference numeral 3 indicates a slide block, and reference numeral 5 indicates a hydraulic cylinder, which are connected to a hydraulic mechanism 4 through a hydraulic system 4a, and 4b and 4c are pressure gauges for measuring the oil pressure of the hydraulic system 4a, respectively. 6 is an example of a detection device for detecting the amount of movement of the slide block 3, and its detailed structure is shown in FIG.
Reference numeral 7 indicates a control circuit, into which signals including hydraulic signals 4d, 4e and position signal 6b are input, and an output signal 8 of the control circuit 7 controls the operation of the hydraulic mechanism 4. Further, the control circuit 7 is provided with a clock circuit.

The rough splitting gap S of the oscillating rough splitting machine 10 can be changed from a MIN value to a MAX value by operating the hydraulic mechanism 4. At this time, the rough dividing gap S is shown on the open side, and the value on the closed side is decreased by the value of the swing stroke. When the rough cutting gap S changes from the MIN value to the MAX value due to the movement of the slide block 3, the amount of movement does not change with a continuous value, but with step values.

When the oscillating coarse cracker 10 is operated, compressive force is applied to the oscillating coarse splitter 2, and the hydraulic mechanism 4 is Hydraulic pressure is generated in the hydraulic system 4a,
When the holding force of the hydraulic system 4a is lower than the holding force of the hydraulic system 4a, the rough splitting or deformation operation continues, and the compressive force is
If the holding force is greater than or equal to the holding force of
is enlarged, coarse cracking is performed under such conditions, and the raw material is discharged from the outlet of the coarse splitting chamber.

However, depending on the properties and shape of the lumpy furnace slag, even if normal oscillating movement is given to the rocking rough dividing plate 2, the biting in the rough dividing chamber may not be sufficient, and appropriate compressive force will not be applied. When operating under such rough cutting conditions, the rough cutting gap S
By expanding or contracting in stages, the contact position of the lumpy furnace slag in the roughing chamber is changed to ensure its engagement, and rough cracking is performed under the action of sufficient compressive force. and is discharged from the outlet of the coarse cutting chamber.

At this time, the rough cracking of the lumpy slag progresses from the boundary area where the iron content is low, the slag content is high, and the strength is low, depending on the differences in the shape and properties of the individual lumpy slag. do.

FIG. 2 shows the relationship between the rough splitting gap S and the step value of the oscillating rough splitting machine 10 according to the present invention.
In Figure 2, the step values are 0, 1, 2, 3,
4, 5,...n, the rough cutting gap S changes stepwise from the MIN value to the MAX value, and the oscillating rough cutting gap S changes stepwise from the MIN value to the MAX value. The machine 10 can be operated. At this time, the step value is the MAX of the rough cutting gap S.
The ratio is 1/10 to 1/5 of the difference between the value and the MIN value.

As described above, as the oscillating rough splitter 10 operates, hydraulic pressure is generated in the hydraulic system 4a of the hydraulic mechanism 4, but detecting this hydraulic pressure is difficult due to differences in the shape and properties of the lumpy furnace slag, as well as rough splitting or deformation. It can be used as a rough estimate of the progress and difficulty of the process.

Then, a hydraulic pressure setting value is determined for automatic operation control, and this is determined as a first setting value P1 and a second setting value P2. The first set value P1 is a hydraulic pressure that indicates whether the lump-like slag is not sufficiently chewed due to getting caught at the inlet of the rocking coarse-splitting machine 10, or whether it has been completely discharged from the coarse-splitting chamber. , and the second set value P2 is below the limit holding pressure of the hydraulic mechanism 4.
Corresponds to the hydraulic pressure that indicates the appropriate compression action for rough splitting or deformation.

FIG. 3 shows a control circuit of the present invention, and its operation will be explained with reference to FIG.

Before the start of automatic operation, the oscillating rough splitter 10 is already operating in a no-load state. When the lump furnace slag is first supplied and automatic operation is started, the determination means 71 determines whether the oil pressure P is greater than the first set value P1, and if NO, the automatic operation is stopped with an alarm. This state indicates that the lumpy slag was not caught in the rocking type rough splitter 10 and continued to idle.

If YES, the determination means 72 is instructed. The determining means 72 issues a command to the determining means 74 in the case of YES, and determines whether the rough cutting gap S is equal to the MAX value, and in the case of YES, the automatic operation is stopped with a warning. In the case of NO, the determination means 73 is instructed.

The determining means 73 determines whether the oil pressure is greater than the second set value P2, and if YES, the command is given to the determining means 74, and if NO, the rough dividing gap S is set to 1.
A command to enlarge the step is given to the hydraulic mechanism 4.
The determining means 74 determines whether the oil pressure P is larger than the first set value P1 together with the command when the determining means 75 is NO, and if it is YES, a command is sent to the determining means 72 to repeat the control. . In the case of NO, the determination means 75 is instructed.

Next, the determining means 75 determines the rough cutting gap S.
Determine whether it is equal to the MIN value, and if YES, complete the process. In the case of NO, a command is given to the hydraulic mechanism 4 to reduce the rough splitting gap S by one step, and a command is also sent to the determining means 74 to repeat the control.

As described above, according to the above embodiment, in the automatic operation method of the oscillating rough splitting machine, the oil pressure is detected and compared with the set value consisting of the first set value and the second set value, and the rough splitting gap is adjusted in stages according to the step value. It can be adjusted by expanding or contracting it, and even if there are fluctuations in the shape and properties of the lumpy slag, it can be smoothly jammed during rough splitting or deformation operations, and its processing capacity can be improved, significantly improving functionality. be able to.

FIG. 4 shows an example of the structure of a detection device for detecting the amount of movement of the slide block 3.

In FIG. 4, 6 is a detection device, and 6a is a dock, which is attached to the slide block 3 and moves together with the slide block 3. 6b,6
c is a mounting base for the limit switches 6d and 6e, respectively, and is used together with the detection device 6 for the swing type rough splitter 1.
It is installed in a fixed position at 0. Limit switches 6d and 6c have step values of 0 and 1, respectively.
They are installed in pairs at positions corresponding to numbers 2, 3, 4, 5, . When pressed, it indicates a conductive state, and when it is not pressed, it indicates a non-conductive state. Furthermore, by attaching them in pairs at positions corresponding to the step values, unstable operation caused by the use of a single limit switch can be prevented, and the operation of the hydraulic mechanism 4 can be ensured.

It goes without saying that the aspects of the rocking rough splitter and the detection device used in the present invention are not limited to those of the above-mentioned embodiments.

[Effects of the Invention] As is clear from the above embodiments, the present invention uses a relatively simple configuration to improve the rough cutting condition which varies depending on the shape and properties of the lumped furnace slag, and the hydraulic pressure of the hydraulic mechanism which varies depending on the compression force. It is possible to reliably grasp the fluctuation trends over time, expand or reduce the rough cracking gap step by step, and make the operation control easier. The effects are great, such as making it smoother, increasing the throughput of the oscillating coarse splitter, and significantly improving its functionality.

[Brief explanation of the drawing]

Fig. 1 is a lock diagram schematically showing an automatic operation control method for an oscillating rough splitting machine according to an embodiment of the present invention; Fig. 2 is an explanatory diagram showing the relationship between the rough splitting gap and step value in the same method; FIG. 3 is a control circuit diagram of the same method, and FIG. 4 is a detailed diagram of a movement amount detection device of the same method. 10...Occillating rough splitter, S...Rough splitting gap, 4...
...Hydraulic mechanism, 6...Detection device, 7...Control circuit.

Claims (1)

[Claims] 1. In an automatic operation control method for an oscillating rough-splitting machine that adjusts the rough-splitting gap by expanding or contracting it in stages using a hydraulic mechanism depending on the rough-splitting situation of the lump furnace slag, the method comprises: detecting the oil pressure of the hydraulic mechanism; As a variable of rough division situation,
An automatic operation control method for an oscillating rough-splitting machine, which comprises adjusting a rough-splitting gap by comparing oil pressure with a set value.