JPS6138959Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a double cylinder press for extracting fiberboard from a fiber mixture such as pulp.

The double cylinder press developed by the present inventor and already published as Patent No. 885078 (Special Publication No. 52-0741) has the following configuration. That is, a cage cylinder is mounted on an axis, and a fixed butt with one side open and the cage cylinder are mounted on an axis,
A swinging butt with one side open is screwed together at the lower part of the open side, and the space between the two butts is elastically closed with a flexible material made of rubber cloth or synthetic resin cloth,
The swinging vat was supported by a pressure cylinder or a threaded jack with a cushion, and seal bands were used to seal between both ends of the cage cylinders and the vat, and a drain port provided on the side of the vat was connected to a water level regulator. It was hot. Although this double cylinder press exhibited various effects not seen before, various points that needed improvement were found when it was put into practical use.

First, the previously developed double cylinder press had the disadvantage that it was difficult to control the flow of the fiber mixture in both vats, which had a large disadvantage in terms of processing capacity and dewatering concentration.

In addition, in the double cylinder press that was developed earlier, the seal band was used to seal between both ends of the cage cylinder and the butt, so during the rotation of both cage cylinders, the raw material separated from the cage cylinder became particles with a diameter of about 1 cm. If the lumps accumulate in the compression parts of both cage cylinders, the presence of the lumps may damage the wire mesh surface of the cage cylinder, and it will require a great deal of effort to remove the lumps. There was a negative effect.

Furthermore, in the previously developed double cylinder press, when the fiber mixture is highly compressed and dehydrated in the compression sections of both cage cylinders, the more robust the structure of the cage cylinders, the narrower the width of the compression section. A phenomenon was observed in which water dehydrated by high compression was rapidly decompressed by high speed rotation and reabsorbed by the fiberboard, which expanded like a sponge. Such an adverse phenomenon was a big negative in terms of dehydration treatment capacity and dehydrated concentration.

As described above, the present invention is an improvement on the double cylinder press of Patent No. 885078 in particular in order to eliminate the disadvantages when put into practical use.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 designates a fixed butt, and a cage cylinder A to which a wire mesh A' is attached is mounted on a shaft 2, and one side of the cage cylinder A is open. Also, 3
1 is a swinging butt 3, and a cage cylinder B having a wire mesh B' attached thereto, which is opposite to the cage cylinder A, is mounted on a shaft 2', and one side of the cage cylinder B is open. The lower surfaces of both butts 1 and 3 are curved so as to follow the circumferences of the cage cylinders A and B, which are axially mounted. The gap between the follower cage cylinder and the butt is curved so that it gradually narrows until it reaches the installation side. The lower parts of the fixed butt 1 and the swinging butt 3 are pivotally connected 4, and the pivoting part 4 is used as a fulcrum by the raising and lowering function of a lifting device 5 such as a pressure cylinder that supports the swinging butt 3. The butt 3 is pivoted so that the width of the gap between the cage cylinders A and B can be adjusted.

Further, both open end portions of the fixed butt 1 and the swinging butt 3 are connected in a closed state via a flexible material 6 made of rubber cloth or synthetic resin cloth. Said flexible material 6
is given a predetermined play width 7, and of this play width 7, a play width 7' arranged at the lower part of the open side end of each butt 1, 3 is a width 7' when the cage cylinders A and B are close to each other. It is formed so as to be regulated (deformed) into an inverted U-shape according to the direction.

Further, an annular protrusion 8 is formed at both ends of the cage cylinders A and B, and is concentric with the cage cylinder and has an outer diameter smaller than the outer diameter of the cage cylinder, and a seal 9 is formed between the protrusion 8 and the butt. The spaces between both ends of both cage cylinders A and B and butts 1 and 3 are sealed. A gap between the protrusions 8 formed at both ends of the opposing cage cylinders A and B is configured as an open part 10.

Further, 11... is a plurality of drainage plates attached at regular intervals to the inner peripheral surfaces of both cage cylinders A and B, and the drainage plates 11 are attached with an inclination that conforms to the rotational direction of the cage cylinders. ing. The drainage plate 11 also functions as a horizontal rib constituting a cage cylinder. Reference numeral 12 designates supply pipes for raw material liquid that are opened at the bottoms of the vats 1 and 3, respectively, and 13 and 13 are respectively opened at the side walls of the vats 1 and 3 corresponding to both ends of the cage cylinders A and B. It is a drain hole.

Since the present invention is constructed as described above, the swinging vat 3 is raised and lowered in advance by the lifting device 5 such as a pressure cylinder to set the gap width between the cage cylinders A and B, and the raw material is fed from the raw material supply pipe 12 by the arrow shown in the arrow. When the shafts 2 and 2' of the cage cylinders A and B are rotated in the direction of the arrow C via an appropriate drive mechanism, the raw material flows into the outer peripheral surfaces of the cage cylinders 1 and 3 and the butts A and B. Guided by the inner circumferential surface and a passage formed by the flexible material 6 which is regulated (deformed) into an inverted U shape, the fibers flow in the direction of arrow D, and the fibers flow into the wire mesh surfaces A' and B of the cage cylinders A and B. ′ is adsorbed. In addition, if the fibers adsorbed on the wire mesh surface of cage cylinder A peel off from the cage cylinder during rotation of cage cylinders A and B, become granular lumps with a diameter of about 1 cm, and accumulate in the compressed area between the cage cylinders. The mass is moved in the direction of arrow E through the opening 10 formed between the opposite ends of both cage cylinders A and B.
The fibers fall like this, are guided into the passage again and flowed in the direction of arrow D, and are again adsorbed on the wire mesh surface of the cage cylinder. The waste liquid discharged into the cage cylinder is effectively guided toward the center of the cage cylinder by the water sprinkling plate 11, and the waste liquid is discharged through drain ports 13 opened on the sides of both vats. The fibers are then extracted in the form of plates.

As described above, in the present invention, the raw material supplied into the vat from the raw material supply pipe is connected to the outer peripheral surface of the cage cylinder, the curved inner peripheral surface of the vat, and the flexible vat that is regulated (deformed) in an inverted U shape. Because it is effectively adsorbed to the wire mesh surface of the cage cylinder while being effectively guided through the passage formed by the material, it has significantly improved processing capacity and dewatering concentration compared to the previously developed double cylinder press. I can figure it out.

In addition, in the present invention, if the fibers adsorbed on the wire mesh surface of the cage cylinder peel off from the cage cylinder during rotation of the cage cylinder and become a lump with a diameter of about 1 cm and accumulate in the compression parts of both cage cylinders, The mass falls from the opening formed between both ends of the cage cylinder in the direction of arrow E, is guided into the passage again and flows in the direction of arrow D, and the fibers are again adsorbed to the wire mesh surface of the cage cylinder. Unlike the previously developed double cylinder press, there is no risk of damaging the wire mesh surface of the cage cylinder due to the presence of fiber lumps separated from the cage cylinder, and the labor required to remove the lumps can be saved. We can expect a significant increase in processing capacity compared to the newly developed double cylinder press, and
The problem of damaging the wire mesh surface of the cage cylinder can also be eliminated.

Furthermore, in the present invention, the waste liquid discharged into the cage cylinder is effectively guided toward the center of the cage cylinder by the drainage plate and discharged through the drain port, so that the waste liquid discharged into the cage cylinder is effectively guided toward the center of the cage cylinder by the drainage plate and discharged through the drain port. The double cylinder press, which was developed earlier, eliminates the bad phenomenon in which waste liquid dehydrated through high compression is suddenly decompressed due to high speed rotation and reabsorbed by the expanded fiberboard like a sponge. This allows for a significant increase in processing capacity and dehydrated concentration.

As described above, the present invention has the effect of significantly increasing processing capacity and dewatering concentration compared to the previously developed and proposed double cylinder press of Patent No. 885078.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing the double cylinder press of the present invention, and FIG. 2 is a sectional plan view thereof. A, B... Cage cylinder, 1... Fixed butt, 3... Swinging butt, 5... Lifting device, 6...
Flexible material, 7... Play width of flexible material, 9... Seal,
10... Opening part, 11... Drainage board.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed butt 1 on which a cage cylinder A is mounted 2' and a swinging butt 3 on which a cage cylinder B opposite the cage cylinder A is mounted 2' are attached to each other's lower surfaces. Due to the raising and lowering function of the lowering-saving device 5 which is pivotally attached to the swing butt 3 and supports the swing butt 3, the cage cylinder B which is pivoted on the pivot shaft 2' inside the swing butt 3 and the inside of the fixed butt 1 are moved around the pivot part 4 as a fulcrum. In a double cylinder press in which the width of the gap between the cage cylinder A and the cage cylinder A mounted on the shaft can be adjusted, the lower surfaces of both butts 1 and 3 are curved, and the opposing sides of both butts 1 and 3 are opened. The open side ends of both butts are connected in a closed state through a flexible material 6 made of rubber cloth or synthetic resin cloth with a predetermined play width 7, and the lower open side ends of each butt 1 and 2 are connected in a closed state. The free width 7' of the flexible material 6 arranged in the cage cylinders A and B is formed so as to be regulated in an inverted U-shape as the cage cylinders A and B approach each other.
An annular protrusion 8 that is concentric with the cage cylinder and has an outer diameter smaller than the outer diameter of the cage cylinder is formed at both ends of the cage cylinder, and a seal 9 is formed between the protrusion 8 and the butt to connect both ends of both cage cylinders and the butt. A double cylinder press characterized in that an open part 10 is formed between both ends of both opposing cage cylinders by sealing the space between them. (2) Practical use characterized in that the lower surfaces of the butts 1 and 3 are curved so that the distance between the cage cylinders and the butts gradually narrows to the opposite sides of the cage cylinders A and B. A double cylinder press according to claim 1 of the patent registration claim. (3) A request for utility model registration characterized in that a plurality of drainage plates 11 are installed at regular intervals on the inner peripheral surfaces of both cage cylinders A and B with an inclination that conforms to the direction of rotation of the cage cylinders. A double cylinder press as described in Scope 1. (4) The drainage plate 11 is a cage cylinder A,
The double cylinder press according to claim 3 of the utility model registration, characterized in that the double cylinder press is formed of horizontal ribs constituting B.