JPS6011120Y2 - Mechanical pulping equipment for fibrous materials - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for mechanically processing pulp raw materials made of wood fibers, non-wood fibers, etc. to pulp.

This type of conventional device has a driving side disk rotated by a drive mechanism, and a driven side disk that is eccentrically diametrically disposed opposite to this disk so as to be freely rotatable. A device is known in which the driven disk rotates following the rotation of the driving disk through the high-concentration pulp material supplied therebetween, thereby grinding the pulp material.

Other conventional devices of this type include a rotating disk rotated by a drive mechanism, and a stationary disk coaxially disposed opposite to this disk, and a disk provided between the two disks. There is a known method in which pressurized steam is supplied to the pulp raw material to grind the pulp raw material under pressure.

However, the former has a structure in which the pulp raw material is ground under no pressure, that is, under atmospheric pressure, while the latter has a structure in which both disks are arranged coaxially, so both have advantages and disadvantages. Therefore, the quality of the obtained pulp could not be made sufficiently satisfactory.

The present invention has been developed in view of the above circumstances, in which one disk rotated by a drive mechanism is eccentrically arranged in the diametrical direction and is rotatably opposed to the other disk, and the pulp raw material is transported under pressure. It is an object of the present invention to provide a mechanical pulping device for cellulosic materials, which can make the quality of the obtained pulp even more satisfactory by having a configuration that performs grinding.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a frame, on which one end of a hollow shaft 2 is rotatably supported via a sleeve 3 and a seal member 4.

The other end of the shaft 2 is rotatably supported by a housing 7 via thrust bearings 5 and 6.

Note that one thrust bearing 6 is biased in the direction of arrow A by a spring 9 via a ring 8.

A drive-side disk 10 is provided at a portion of the shaft 2 located within the frame 1.

Further, a pulley 11 is provided on a portion of the shaft 2 located outside the housing 7.

When the pulley 11 is rotated by a motor (not shown), the shaft 2 rotates together with the drive-side disk 10.

A tubular body 12 is provided inside the shaft 2 so as to be relatively rotatable.

That is, the tubular body 12 is fixedly disposed.

A feed screw 13 is rotatably provided inside this tubular body 12.

A sprocket 14 is provided on the feed screw 13.

When the sprocket 14 is rotated by a motor (not shown), the feed screw 13 is rotated.

An inlet chamber 15 is provided above one end of the tubular body 12 .

The inlet chamber 15 is connected to a pressure steam supply source 18 via a pipe 17 with a pulp 16 interposed therebetween.

The feed screw 13 is hollow, and this hollow part is connected to the pressure steam supply source 18 via a pipe 20 with a pulp 19 interposed therebetween, and is connected to the pressure steam supply source 18 via a pipe 22 with a pulp 21 interposed therebetween. and is connected to a chemical solution supply source 23.

Note that an outlet chamber 24 is provided at the bottom of the frame 1.

A cover 25 is attached to the frame 1 with bolts (not shown) so that its position can be adjusted in the vertical direction.

Note that there is an O-ring 26 between the frame 1 and the cover 25.
is provided.

One end of a shaft 27 is rotatably supported by the cover 25 via a sleeve 28 and a seal member 29.

The other end of the shaft 27 is rotatably supported by the housing 32 via thrust bearings 30, 31.

Note that one thrust bearing 30 is biased in the direction of arrow B by a spring 34 via a ring 33.

A driven side disk 35 is provided at a portion of the shaft 27 located within the frame 1.

Further, a pulley 36 is provided at a portion of the shaft 27 located outside the housing 32.

When the starter motor 37 starts, the pulley 3
6 is rotated, the shaft 27 moves to the driven side disk 35.
It is designed to rotate together with the

A frame 38 is provided outside the housing 32 so as to be relatively slidable in the directions of arrows A and B.

That is, the frame 38 is fixedly disposed, and the housing 32 is located within the frame 38 as indicated by the arrows A and B.
It is provided so that it can be slid in any direction.

A cylinder 39 is provided at one end of the frame 38, and a piston/piston rod 40 is provided within the cylinder 39 so as to be slidable in the directions of arrows A and B.

The piston/piston rod 40 is biased in the direction of arrow A by hydraulic pressure or air pressure.

Note that the piston/piston rod 40 is connected to the housing 32.
is attached by bolts (not shown).

Further, a threaded portion 41 is formed in a portion of the piston/piston rod 40 located outside the cylinder 39, and a lock nut 42, 43 is screwed into this threaded portion 41.

By adjusting the screwing positions of these lock nuts 42 and 43 with respect to the threaded portion 41, the positions of the piston/piston rod 40, housing 32, and shaft 27 relative to the cylinder 39 and frame 38 in the directions of arrows A and B are adjusted. In turn, the gap between the driven disk 35 and the driving disk 10 is adjusted.

Next, the operation of the above-mentioned constituent device will be explained.

First, the cover 25 is attached to the frame 1 by appropriately shifting it downward, thereby causing the driven side disk 35 and shaft 27 to be appropriately eccentric with respect to the driving side disk 10 and the shaft 2, as shown in the figure.

It is also assumed that the inlet chamber 15 contains a highly concentrated pulp raw material made of wood fibers, non-wood fibers, and the like.

The pulp raw material accommodated in this manner is transferred within the tubular body 12 in the direction of arrow B by the rotation of the feed screw 13, and is supplied between the two disks 10.35.

Then, the rotational force of the drive-side disc 10 rotating together with the shaft 2 is transmitted to the driven-side disc 35 via the high-concentration pulp raw material supplied between the two discs 10.35. The pulp raw material supplied during this time is twisted and twisted, and the intertwining between the fibers becomes active, resulting in high-strength fibers.

Also, at this time, pressure steam from the pressure steam supply source 18 is supplied between both disks 10.35, so that the pulp raw material is ground under pressure, which further increases the flexibility of the fibers and prevents cutting and deterioration of freeness. It becomes a fiber with high strength without any oxidation.

The ground fibers are then introduced into the outlet chamber 24.

Note that the inside of the frame 1 in which both the disks 10.35 exist is made airtight by the seal members 4, 29 and the O-ring 26, so that the pressurized steam supplied therein does not leak to the outside.

Further, when the shafts 2, 27 thermally expand due to the heat of the pressure steam, the thrust bearings 6.30 are moved in the direction of arrow A and the direction of arrow B by the force of the springs 9, 34 accordingly. There is no gap between the shafts 2, 27 and the thrust bearing 5.6.30.31.
The shaft 2°27 rotates smoothly without rattling.

Furthermore, when a large amount of pulp raw material is supplied between both disks 10.35, the driven side disk 35 moves in the direction of arrow B together with the shaft 27 and the piston/piston rod 40 against the hydraulic or pneumatic force. This provides a cushioning effect when a large amount of pulp raw material is supplied.

In the above embodiment, the driven side disk 35 is rotated together with the shaft 27 by the starter motor 37 only at the time of startup, and during operation, the driven side disk 35 is rotated by transmitting the rotational force of the driving side disk 10, but the invention is not limited to this. Instead, a motor having sufficient capacity may be used to rotate the motor not only during startup but also during operation.

As described above, according to the mechanical pulping apparatus for cellulosic substances according to the present invention, the other disk is eccentrically diametrically opposed to one disk rotated by the drive mechanism and is rotatably opposed to the other disk. Since the raw material is ground under pressure, the quality of the obtained pulp can be made even more satisfactory.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. 1...Frame, 2...Shaft, 7
...Housing, 10 ... Drive side disk, 11 ... Pulley, 13 ... Feed screw, 15 ... Inlet chamber,
18... Pressure steam supply source 24... Outlet chamber, 25... Cover 27.
...Shaft, 32 ...Housing, 3
5... Driven side disk.

Claims (1)

[Scope of utility model registration request] a first disk that is rotatably provided; a drive mechanism that rotates the first disk; and a second disk that is eccentric in the diametrical direction and is rotatably disposed opposite to the first disk. A fiber comprising: a pulp raw material supply mechanism that supplies pulp raw material between the two discs; and a pressure steam supply mechanism that supplies pressurized steam to the pulp raw material supplied between the two discs. Mechanical pulping equipment for elementary materials.