JPH0456669B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the hydraulic mechanism of an oscillating coarse splitter.

[Conventional technology]

In order to recover the iron content in blast furnace slag, converter slag, electric furnace slag, etc. generated in the iron and steel manufacturing process, and to utilize slag, we use an oscillating rough splitter to reduce the iron content to 50%.
It is high at ~60% or more, and its dimensions are 300 to 500 mm.
The above-mentioned lumped furnace slag is roughly divided or deformed (for example, Japanese Patent Application Laid-Open No. 147252/1983). By equipping such an oscillating rough splitting machine with a hydraulic mechanism,
In the operation of coarsely splitting or deforming the lumpy furnace slag, the operation becomes smooth and the mechanism can be improved (for example, Japanese Patent Application Laid-Open No. 60-251941).

In addition, for example, the Jyo crusher described in Japanese Patent Publication No. 18631/1983 is capable of roughly crushing or deforming the lumpy furnace slag in which hard foreign matter is mixed into the material to be crushed. The fixed jaw) and the swinging tooth (moveable jaw) form a rough splitting chamber with a rough splitting space (between tooth plates), and a hydraulic cylinder is attached to a slidable toggle block that supports the swinging tooth via a toggle plate. It is provided. The pipeline (oil pipe) between the hydraulic cylinder and the hydraulic pump (electric oil transfer pump) is equipped with a hydraulic mechanism including a pilot check valve, solenoid valve, check valve, pressure switch, and an accumulator. There is.

In addition, in the above-mentioned conventional geoyoke crusher, the slide block is positioned at the maximum extrusion position of the piston in the hydraulic cylinder, and the position of the slide block is maintained constant even during operation, and the eccentric shaft of the geoyoke crusher is maintained at a constant position. The amount of oscillation of the oscillating movement of the oscillating tooth based on rotation is always constant,
Therefore, the rough cutting interval (indicating the open side) is always maintained at a constant value, and the rough cutting or deformation operation of the lumpy furnace slag is performed.

Hydraulic pressure equivalent to the pressure of the accumulator is constantly applied to the hydraulic cylinder under high pressure in order to generate a pressing force that can correspond to the compressive force accompanying the rough cracking or deformation of this block-shaped furnace slag. .

If the lump furnace slag has a significantly high iron content and contains foreign matter such as iron ingots that are difficult to break apart, the pressure inside the hydraulic cylinder will rise above the pressure of the accumulator, and the pressure switch will reduce the applied pressure. It is detected and the solenoid valve is switched, and the pilot valve is operated by the hydraulic pressure of the accumulator.
By discharging the hydraulic oil in the hydraulic cylinder to the outside and retracting the piston, the rough splitting space is expanded, and foreign objects are dropped and discharged from the rough splitting chamber.

[Problem to be solved by the invention]

However, in the hydraulic mechanism of the conventional oscillating rough splitting machine, the hydraulic pressure in the hydraulic cylinder is pressurized until it becomes equal to the pressure in the accumulator.
In other words, high-pressure oil acts so that the piston in the hydraulic cylinder reaches its maximum extrusion position from the time of startup, and high-pressure oil also acts during operation.
When rough cracking or deformation of lumpy slag is performed, even if the load condition fluctuates widely, the position of the slide block is maintained at a constant position, so the rocking movement of the rocking teeth is not affected. Since the amount of oscillation is always constant, the required amount of oscillation can be obtained under a pressing force that can handle the compressive force associated with the coarse cracking load during rough splitting or deformation of bulk furnace slag with a high iron content. Even though the coarse cracking load is small during rough cracking or deformation of soft lumpy slag with low iron content, There was a problem that the amount of rocking could not be large, and therefore sufficient rough splitting or deformation could not be performed. In addition, under such conditions, the surface portion of the lumpy slag is only partially peeled off, and the cracks do not propagate and expand over the entire surface to reduce its size. This has been accompanied by problems such as the lumped furnace slag being retained in the rough-splitting chamber, making it impossible to perform sufficient rough-splitting or deformation treatment.

The present invention solves such conventional problems, and in the rough cracking or deformation operation of the block slag, the rough cracking load state varies widely despite the variation in the properties of the block slag. Even in such a case, the compressibility of the hydraulic oil in the hydraulic cylinder causes a volume change corresponding to the pressure change, and the displacement of the slide block is made movable, and the amount of rocking of the rocking teeth is adjusted to vary, resulting in rough splitting or deformation operation. An excellent oscillating coarse cracker that can automatically continue the process, reliably reduce the size of lumpy slag, and significantly improve the throughput of the oscillating coarse cracker. The purpose of this invention is to provide a hydraulic mechanism.

[Means for solving problems]

In order to achieve the above object, the present invention includes a fixed tooth and a swinging tooth that performs a swinging motion to form a rough splitting chamber having a rough splitting distance, and a slideable space that supports the swinging tooth via a toggle plate. The hydraulic mechanism consists of a hydraulic cylinder installed close to the slide block, and a relief valve in the pipeline between the hydraulic cylinder and the hydraulic pump. The slide block is positioned, and the displacement of the slide block is made movable by a change in volume corresponding to the pressure change of the hydraulic oil caused by the coarse cracking load of the rough splitting machine. When the pressure increases to a high pressure, the slide block is moved back, and the amount of swing of the swing teeth when the coarse splitting load changes is variably adjusted.

[Effect]

The present invention has the following effects due to the above configuration. In other words, in the oscillating rough splitter, the required amount of hydraulic oil is filled in the hydraulic cylinder to position the slide block at the required position, and the oscillating teeth are adjusted based on the eccentric rotation of the oscillating coarse splitter. Rough splitting or deformation of the lumpy slag is performed under a rough splitting interval according to the amount of oscillation of the oscillating motion, and at this time, a pressing force capable of responding to the compressive force accompanying the rough splitting load is generated. is being used.

When rough-splitting or deforming soft lumpy slag with low iron content, the rough-splitting load is small, so
The hydraulic pressure in the hydraulic cylinder is low, so almost no compression of the hydraulic oil occurs, and the amount of oscillation is equal to the standard amount of oscillation of the oscillating tooth caused by the rotation of the eccentric shaft of the oscillating rough splitter. Sufficient rough splitting or deformation is performed with the following steps. On the other hand, when rough-splitting or deforming hard lumpy furnace slag with a high iron content, the rough-splitting load increases. At this time, the partial cracks in the lumpy slag rapidly develop over the entire surface, and the pressing force that can correspond to the compressive force also increases, causing the pressure of the hydraulic fluid in the hydraulic cylinder to rise and become high pressure. On the other hand, since the flow of hydraulic oil is blocked under conditions below the operating pressure of the relief valve of the hydraulic mechanism, the hydraulic oil changes volume in response to pressure changes according to its compressibility under the above-mentioned high hydraulic pressure. This causes the movement of the piston, and the position of the slide block is retracted to a position retracted from the above-mentioned position, and in this retracted position, the oscillating tooth oscillates under the hydraulic pressure of the hydraulic oil corresponding to the high coarse load. A dynamic movement is performed to roughly split or deform the slag. In addition, the amount of oscillation of the oscillating teeth will be reduced, but the rough cracking interval will be expanded, so the rough cracking operation can be continued without generating a significantly excessive coarse cracking load, and the block furnace slag can be processed. can be reduced in size. In this way, even though the properties of the lump furnace slag change due to changes in the volume of the hydraulic oil in the hydraulic cylinder, it is difficult to perform coarse cracking of soft lump furnace slag under large vibration amounts, and even for hard lump furnace slags. In the rough cracking operation of slag, if the swing amount of the swing teeth is variably adjusted when the rough splitting load changes under a small swing amount, it is possible to automatically continue the rough splitting or deformation operation. It is possible to significantly improve the throughput of the oscillating rough cutter.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show one embodiment of the present invention.

In Fig. 1, numeral 10 indicates a swing-type rough splitter, 11 is a fixed tooth, 12 is a swing tooth, and W is a rough splitting space, and a coarse splitting chamber 14 is formed by these. ing. The swinging tooth 12 is supported by a slide block 18 via a toggle plate 16, and is driven by a drive device (not shown), and the swinging tooth 12 is rotated with the slide block 18 as a node by rotation of the eccentric shaft 20. Twelve rocking movements are performed. 24 is a hydraulic cylinder;
26 is a piston, and the slide block 18
The slide block 18 is mounted so as to be slidable by the action of hydraulic pressure.

In FIG. 2, reference numeral 30 indicates a hydraulic mechanism, which is comprised of a hydraulic pump 36, relief valves 40, 46, a switching valve 42, pipes 48, 52, and the like. Note that 38 is a check valve, 34 is a filter, and 32 is an oil tank. The hydraulic oil discharged from the hydraulic pump 36 flows in only one direction through a check valve 38 provided in a pipe line 50, and is connected to the hydraulic cylinder 24 through a pipe line 52, so that a certain amount of operation is carried out at low pressure. The piston 26 encloses the first
The slide block 18 shown in the figure is moved to a predetermined position and positioned, and the swing teeth 12 are set at the predetermined position to form a rough gap W.

At this time, by regulating the amount of hydraulic oil sealed, the piston 26 is located at an intermediate position within the oil cylinder 24, so the piston 26 is actuated by the hydraulic cylinder so that it can freely move within the oil cylinder 24. be able to.

Then, by positioning the slide block 18 so as to move forward toward the swing tooth 12 side, the amount of swing increases according to the swing movement mechanism of the swing tooth 12, and conversely, the slide block 18
When the position is set back from the rocking tooth 12 side, the amount of rocking decreases.

Next, the operation of the above embodiment will be explained. In the above embodiment, after the piston 26 in the hydraulic cylinder 24 is moved and the slide block 18 is positioned at a predetermined position, the eccentric shaft 20 is rotated by the drive of the drive device, and the slide block 18 is rotated by the driving device.
The swinging movement of the swinging tooth 12 is performed with the swinging tooth 12 as one node, and the coarse splitting interval W of the coarse splitting chamber 14 according to a predetermined swinging amount is changed by a dimension equivalent to the swinging amount. When the lump-like slag is supplied to the rough-splitting chamber 14, the lump-like slag is rough-split or deformed and then discharged. At this time, the pressing force necessary to correspond to the compressive force accompanying the rough splitting load is generated by the hydraulic mechanism 30 while applying hydraulic pressure proportional to the pressing force to the piston 26 using hydraulic oil sealed in the hydraulic cylinder 24. It is attached to the swing tooth 12 via the slide block 18.

When rough-splitting or deforming soft lumpy furnace slag with a low iron content, the rough-splitting load presents a small load, and on the other hand, the oil pressure of the hydraulic oil sealed in it also exhibits a low pressure, so the volume of the hydraulic oil decreases. The change is slight, and the hydraulic pressure and the amount of swing in the hydraulic mechanism 30 are operated under substantially the same conditions as the setting location and with a large amount of swing, and sufficient rough splitting or deformation is performed. In this way, only the surface portion of the lumpy furnace slag is not partially peeled off, and the cracks develop and expand over the entire surface, thereby making it possible to reliably reduce the size.

On the other hand, when rough-splitting or deforming hard lumpy slag with a high iron content, as the rough-splitting load increases, the rough-splitting load becomes high. At this time, as the compression force increases, the pressing force that can correspond to the compression force also increases, and the pressure of the hydraulic fluid in the hydraulic cylinder 24 rises to a high pressure. On the other hand, since the flow of hydraulic oil is cut off when the operating pressure is lower than the operating pressure of the relief valve 40 of the hydraulic mechanism 30, the hydraulic oil changes in volume under the above-mentioned increased oil pressure, and the pipe line 52 and The volume of hydraulic oil in the hydraulic cylinder 24 is reduced, the piston 26 moves, and the slide block 18 is displaced and retreated to a position that is more retreated than the forward position. and,
The movement of the slide block 18 described above is based on the eccentric shaft 2.
The hydraulic oil pressure in the hydraulic cylinder 24 repeatedly increases and decreases with each rotation of 0, and the volume of the hydraulic oil corresponding to this oil pressure also changes in the same way, making it possible to displace the position of the slide block 18. is,
As the slide block 18 moves backward and forward repeatedly, the swinging motion of the swinging teeth 12 continues.

At this time, due to the retraction of the position of the slide block 18, the amount of rocking caused by the rocking movement of the rocking teeth 12 is reduced. If the amount of rocking is reduced under such conditions, the change in the rough splitting distance W is said to be slight, and the number of rocking teeth is optimal for rough splitting or deformation of hard lumpy furnace slag. The coarse cracking or deformation operation under the oscillation amount of 12 is automatically continued, and the bulk furnace slag is discharged from the coarse cracking chamber 14 whose size has been reduced. The operating pressure of the relief valve 40 is set in accordance with the durability strength of the oscillating coarse splitter 10.

In this way, according to the above-mentioned embodiment, despite fluctuations in the properties of the lumpy slag, the compressive force accompanying the coarse cracking load during the rough cracking or deformation operation can be controlled by changing the volume of the hydraulic oil corresponding to the change. Processing of an oscillating type rough splitting machine by displacing the position of the slide block and variably adjusting the amount of oscillation of the oscillating teeth when the rough splitting load fluctuates, thereby making it possible to reliably reduce the size of the lumpy slag. It has the effect of significantly improving ability.

Note that the embodiments of the present invention are not limited to the above embodiments.

〔Effect of the invention〕

As is clear from the above embodiments, the present invention displaces the position of the slide block by changing the volume of hydraulic oil corresponding to the compressive force accompanying the coarse splitting load, and the swinging movement of the swing teeth when the coarse splitting load fluctuates. The amount of oscillation is adjusted by the method, and even if there are wide fluctuations in the load condition during rough cracking or deformation of block slag, changes in the amount of oscillation will prevent changes in the properties of the slag. Regardless of the situation, it is possible to reliably reduce the size of the lumpy slag, and whenever the rough cracking load becomes excessive, the hydraulic oil in the hydraulic cylinder is discharged to the outside by the action of a pressure switch, and the piston is retracted. Since it is possible to avoid increasing the rough cracking distance or stopping the operation of the oscillating crusher, it is possible to significantly improve the processing capacity as well as the reduction performance of the oscillating crusher. It is.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a hydraulic mechanism of an oscillating rough splitting machine according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of the hydraulic mechanism of the same apparatus. 10...Occillating rough splitter, 11...Fixed teeth, 12
...Rocking tooth, 16...Toggle plate, 18...
Slide block, 24...Hydraulic cylinder, 30
...Hydraulic mechanism, 36...Hydraulic pump, 40...Relief valve, 50, 52...Pipeline, W...Rough split interval.

Claims (1)

[Claims] 1 A rough splitting chamber having a rough splitting space is formed by the fixed tooth and the swinging tooth that performs a swinging motion, and a hydraulic pressure is provided adjacent to the slidable slide block supported via the swinging tooth and the toggle plate. cylinder and
The hydraulic mechanism includes a relief valve in the pipeline between the hydraulic cylinder and the hydraulic pump, and the hydraulic cylinder is filled with a required amount of hydraulic oil at low pressure to position the slide block and move the rough splitter. When the displacement of the slide block is made movable due to the volume change corresponding to the pressure change of the hydraulic oil due to the rough dividing load, and the pressure of the hydraulic oil increases and becomes high pressure due to the high rough dividing load, the slide block moves backward. A hydraulic mechanism for an oscillating coarse splitting machine, wherein the amount of rocking of the oscillating teeth when the rough splitting load changes is variably adjusted.