JPH0110152Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a roll mill used in pulp mills, cane sugar mills and other factories.

Conventional technology A conventional roll mill has a feed roll and a discharge roll installed in parallel at the bottom of the housing.
A top roll is provided above the housing above the housing in parallel and movable up and down, and two cylinder devices are provided above the housing to urge both shaft ends of the top roll downward. was.

Problems to be Solved by the Invention However, with such a conventional two-cylinder roll mill, there was a problem in that the compression on the supply side of the pressed material and the compression on the discharge side of the pressed material greatly influenced each other. That is, during operation, it is necessary to force the top roll downward with a cylinder device and adjust the squeezing force between the top roll and the feed roll and the squeezing force between the top roll and the discharge roll as appropriate, but since these influence each other. , when an appropriate squeezing force is set for one side, an inappropriate squeezing force may be set for the other. As a result, the squeezing capacity on the material supply side, which is a very important element in a roll mill, fluctuates, and this has a negative impact on the squeezing ability on the material discharge side, leading to a decline in the overall squeezing performance. was.

The object of the present invention is to provide a 4-cylinder, 3-roll mill that can solve these problems.

Means for Solving the Problems In order to solve the above problems, the four-cylinder three-roll mill of the present invention is provided with a lower housing that supports the feed roll and the discharge roll in parallel, and allows the top roll parallel to both rolls to be raised and lowered. An upper housing supported by the top roll is swingably provided between both rolls of the lower housing via a pin, and this upper housing is provided with two first cylinder devices for urging both axial ends of the top roll downward. , two second cylinder devices are provided between both sides of the lower housing and the upper housing to swing the upper housing around the pin.

Operation With this configuration, the squeezing force between the top roll and the feed roll and the squeezing force between the top roll and the discharge roll are applied by forcing the top roll downward by the first cylinder device, and by forcing the entire upper housing to the first cylinder. Adjustment is made by rocking the two-cylinder device. This makes it possible to independently control the squeezing force between both rolls on the pressed material supply side and the squeezing force between both rolls on the pressed material discharge side. Things will disappear.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the drawings.

In FIG. 1, 1 is a lower housing that supports a feed roll 2 and a discharge roll 3 in parallel via bearings 4 and 5, and 6 is an upper housing that supports a top roll 7 parallel to both rolls 2 and 3 so as to be able to rise and fall. , both rolls 2 of the lower housing 1,
Pin the lower ends of both sides between 3 (pin joint)
They are swingably connected via 8. Reference numeral 9 denotes two first hydraulic cylinder devices installed on both sides of the upper housing 6, which hold down both shaft ends of the top roll 7 via bearings 10 that can be raised and lowered, and move the top roll 7 downward as appropriate. It functions to energize. Reference numeral 11 designates two second hydraulic cylinder devices that are provided via pins 14 and 15 between the rising portions 12 on both sides provided near the discharge roll 3 of the lower housing 1 and the projecting portions 13 on both sides of the upper housing 6. , upper housing 6
The function is to swing the pin 8 around the pin 8. In this case, as shown in FIG.
₅ is the distance between the point of action A of the top roll 7 on the discharge roll 3 and the pin 8.
It is set to more than twice L ₁ . In FIG. 1, 16 is a turnbuckle type adjustment mechanism for adjusting the angle of a turner plate (not shown).

With this configuration, the pressed material (for example, sugar cane in the case of a cane sugar factory) is supplied from the feed roll 2 side as shown by the arrow, and the pressed material is discharged from the discharge roll 3 side. By pulling the upper housing 6 toward the discharge roll 3 by the second hydraulic cylinder device 11, the state shown in FIG. 2 is achieved. In the figure, each symbol indicates the following.

F _CO : Tensile force of the upper housing 6 by the second hydraulic cylinder device 11 F _T : Compressive force by the first hydraulic cylinder device 9 F _C : Compressive force of the top roll 7 by F _CO F : Resultant force of F _T and F _C (compression Therefore, F _C =L ₂ /L ₁ ×F _CO , which means that F _C is more than twice F _CO , and a considerably larger squeezing force than the conventional roll mill can be obtained.

Effects of the Invention As described above, according to the present invention, the squeezing force between the top roll and the feed roll and the squeezing force between the top roll and the discharge roll can be individually controlled. Therefore, the squeezing capacity on the pressed material supply side, which is a very important element in a roll mill, is not affected by the pressed material discharge side, and as a result, the overall squeezing capacity can be significantly improved. . Further, since the second cylinder is provided, a larger squeezing force than the conventional one can be applied to the pressed material supply side or the pressed material discharge side.
Furthermore, since the lower housing and the upper housing are connected via a pin, and the conventional housing middle part is omitted, weight can be reduced, and there is no need to worry about large moments acting on the middle part of the housing. housing strength can be increased. Further, the upper housing can be easily maintained by removing the pin.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a 4-cylinder, 3-roll mill according to the present invention;
FIG. 2 is an explanatory diagram of the same effect. 1... Lower housing, 2... Feed roll, 3... Discharge roll, 6... Upper housing, 7... Top roll, 8... Pin, 9
...First hydraulic cylinder device, 11...Second hydraulic cylinder device.

Claims (1)

[Scope of utility model registration request] A lower housing that supports a feed roll and a discharge roll in parallel is provided, and an upper housing that supports a top roll parallel to both rolls so that it can be raised and lowered is provided so as to be swingable between both rolls of the lower housing through a pin. 2. Pressing both shaft ends of the top roll downward against the upper housing.
3 four-cylinder cylinders, characterized in that a first cylinder device is provided, and two second cylinder devices are provided between both sides of the lower housing and the upper housing to swing the upper housing around the pin. roll mill.