JPH10219582A - Remodeling of single-canvas dryer and boring device for remodeling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for remodeling a single-canvas dryer, which greatly reduces cost of the remodeling for improving drying capacity. SOLUTION: In this method, boring devices 7 are mounted on a top dryer drum 1, after a canvas 3 is removed. Drills 22, mounted on the boring device in the axial and vertical directions, are moved downward while being rotated, to bore a number of holes 25 on the periphery of a bottom dryer drum 2. A stabilizer 26 is mounted on the bottom dryer drum 2 provided with the holes 25. The bottom dryer drum 2 is then used as the suction roll, without removing it or using a new suction roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for remodeling a single canvas dryer used in a paper machine and a perforation apparatus used for implementing the method.

[0002]

2. Description of the Related Art In a paper machine, the moisture content of a wet paper after passing through a press part is 60 to 70%. However, it is difficult to mechanically remove more water by pressing. Next, a dryer part is arranged, and dehydration is performed by heating and drying.

As a dryer used in a conventional dryer part in a paper machine, a single canvas dryer as schematically shown in FIG. 3 is known. That is, a plurality of top dryer drums 1 and a plurality of bottom dryer drums 2 are arranged in upper and lower two stages, and endless canvases 3 are alternately arranged on the upper plurality of top dryer drums 1 and the lower plurality of bottom dryer drums 2. When the paper (wet paper) 4 that has passed through the press part and is passed between the top dryer drum 1 and the bottom dryer drum 2 and the canvas 3 is sequentially wound around and guided in the paper transport direction. At the same time, they are pressed against each of the dryer drums 1 and 2 to be dried.
Reference numeral 5 denotes a guide roller, and reference numeral 6 denotes a stretch roller.

In the single canvas dryer, a small-diameter suction roll may be used instead of the bottom dryer drum 2 in order to improve the drying ability.

[0005]

However, when a new suction roll is to be mounted, the installation must be performed after the existing bottom dryer drum 2 has been removed, so that there is a problem that the local construction cost becomes enormous.

Accordingly, the present invention is to improve the drying capacity of a single canvas dryer by modifying the bottom dryer drum so that the bottom dryer drum has a suction roll function, without incurring huge local construction costs. Is to be able to do.

[0007]

According to the present invention, in order to solve the above-mentioned problems, a plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower two stages, and the top dryer drum and the bottom dryer drum are endless. The canvas is removed from a single canvas dryer in which the canvas is arranged so as to alternately wrap around the canvas, and the wet paper web is wrapped around the top dryer drum and the bottom dryer drum while sequentially passing through the canvas and transported. After that, a number of holes are formed in the peripheral wall portion of the bottom dryer drum to provide a method for remodeling a single canvas dryer using the bottom dryer drum as a suction roll.

Since the bottom dryer is made into a suction roll by making a hole in the bottom dryer drum, it is not necessary to remove the bottom dryer drum and install a new suction roll, so that the construction cost on site can be greatly reduced.

In addition, by providing a stabilizer at the upper position of the bottom dryer drum after a large number of holes are formed in the peripheral wall, high-speed stability can be obtained, so that fluttering of paper is prevented. .

[0010] Further, a plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower two stages, and the top dryer drum and the bottom dryer drum are arranged in contact with each other so that endless canvases are alternately wrapped around. ,
A base frame extending in the drum axis direction held by the top dryer drum in a single canvas dryer configured to be wound around and transported while sequentially passing between the top dryer drum, the bottom dryer drum, and the canvas; By using a drilling device having a plurality of drills arranged in the drum axis direction and assembled downward so as to be able to move in the drum axis direction and the vertical direction on the frame, drilling work can be performed efficiently. .

[0011]

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

FIGS. 1 (a), 1 (b) and 1 (c) show an outline of a method for modifying a single canvas dryer according to the present invention.
The remodeling work is performed using the drilling device 7.

As shown in an enlarged view in FIG. 2, the perforating device 7 is held by the mounting band 8 and the holding bolt 9 on the side surface of the top dryer drum 1 after the canvas 3 is removed. A base frame 10 extending in the drum axis direction;
A sliding guide 11 and a rack 12 attached in parallel to the surface of the drum along the axial direction of the drum, a gantry frame 13 engaged with and supported by the sliding guide 11, and the gantry frame 13 is attached to the sliding guide 11. A geared motor 15 for driving a pinion 14 meshed with the rack 12 so as to slide along the same; and an elevating guide 1 mounted in parallel on the surface of the gantry frame 13 along the vertical direction.
6 and a rack 17 and a support base 18 for lowering the lower end of the elevating guide 16 projecting downward from the gantry frame 13 by a required length on the bottom dryer drum 2.
And a gear table for driving a pinion 20 meshed with the rack 17 so as to move up and down the drill table 19 along the guide 16 for raising and lowering. A motor 21, a plurality of drills (gun drills) 22 assembled downward to the drill table 19 in an array arranged in the drum axis direction, a motor 23 for driving these drills 22, and drilling powder generated during drilling work by the drills 22. The suction pipe 24 is configured to be sucked.

When remodeling work is performed using the drilling device 7 having such a configuration, first, in a single canvas dryer having a configuration similar to that shown in FIG.
As shown in (a), the perforating device 7 is set with the canvas 3 removed. In this case, the base frame 10 is mounted on the side of the top dryer drum 1 located immediately above the bottom dryer drum 2 to be remodeled by using the mounting band 8 and the holding bolt 9 so as to be hugged, and The top dryer drum 1 or the bottom dryer drum 2 is moved and adjusted in the vertical direction so that 18 is placed in contact with the upper surface of the bottom dryer drum 2. At this time, as shown in FIG. 2, the gantry frame 13 is previously positioned at one end of the base frame 10 in the longitudinal direction.

In the above state, the pinion 2 meshed with the rack 17 by driving the geared motor 21 while rotating the drills 22 arranged in parallel by the motor 23.
By rotating 0, the drill table 19 is lowered and the drill 22 is lowered. Thereby, a plurality of holes 25 are bored side by side at one location on the peripheral wall of the bottom dryer drum 2.

The above-described drilling operation is performed while rotating the bottom dryer drum 2 in the circumferential direction at a required angle and indexing the rotation. Further, the pinion 14 meshing with the rack 12 is rotated by the drive of the geared motor 15 to rotate the drum. The gantry frame 13 is moved in the direction of the drum axis to perform the same operation. As a result, as shown in FIG. 1B, a large number of holes 25 are formed over the entire circumference and the entire length of the peripheral wall of the bottom dryer drum 2. Set up.

Next, after assembling the functional parts necessary for use as a suction roll, the stabilizer 26 is attached to the bottom dryer drum 2 after the punching operation as shown in FIG. 1 (c). When using,
What is necessary is just to hang the canvas 3 like the case of the single canvas dryer shown in FIG.

As described above, in the present invention, since the bottom dryer drum 2 is remodeled into a suction roll by making many holes 25 in the bottom dryer drum 2,
Removal of the bottom dryer drum 2 and installation of a new suction roll can be eliminated. In addition, since the stabilizer 26 is attached to the bottom dryer drum 2 after the perforation, it is possible to stabilize the high-speed operation. Further, in the above-mentioned drilling, a punching device 7 which can be attached to the top dryer drum 1 is provided.
Since it is used, the remodeling work can be performed efficiently.

The present invention is not limited to the above embodiment. For example, as the punching device 7, the entirety of the top dryer drum 1 can be held, and the drill 22 can be moved in the axial direction of the drum. Of course, other structures may be used as long as they can be moved in the vertical direction, and various changes can be made without departing from the spirit of the present invention.

[0020]

As described above, according to the present invention, the following excellent effects are exhibited. (1) A plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower tiers, and an endless canvas is alternately wound around the top dryer drum and the bottom dryer drum. After removing the canvas in the single canvas dryer which is wound around and conveyed while sequentially passing between the dryer drum and the bottom dryer drum and the canvas, a number of holes are formed in the peripheral wall of the bottom dryer drum. In addition, since the bottom dryer drum is used as a suction roll, the drying capacity can be improved without removing the bottom dryer drum and installing a new suction roll, and the local construction cost can be significantly reduced. (2) By installing a stabilizer at the upper position of the bottom dryer drum after drilling a number of holes in the peripheral wall, stability at high speed operation can be obtained,
Paper fluttering can be prevented. (3) A plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower tiers, and an endless canvas is alternately wrapped around the top dryer drum and bottom dryer drum. A base frame extending in the drum axis direction, the base frame being held by the top dryer drum in a single canvas dryer which is wound around and conveyed while sequentially passing between a dryer drum, a bottom dryer drum, and a canvas; Bottom dryer drum without removing the bottom dryer drum by using a drilling device having a configuration including a plurality of drills arranged downward in the drum axis direction so as to be able to move in the drum axis direction and up and down direction Can make multiple holes simultaneously Therefore, work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 shows a method for modifying a single canvas dryer of the present invention, and (a), (b), and (c) are schematic diagrams showing work procedures, respectively.

FIG. 2 is a schematic view showing an example of a perforation apparatus used for implementing a method for modifying a single canvas dryer according to the present invention.

FIG. 3 is a schematic view of a single canvas dryer showing an example of a dryer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top dryer drum 2 Bottom dryer drum 3 Canvas 4 Paper (wet paper) 7 Perforator 22 Drill 25 Hole 26 Stabilizer

Claims (3)

[Claims] 1. A plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower two stages, and an endless canvas is alternately wound around the top dryer drum and the bottom dryer drum so as to alternately wrap them. After removing the canvas in the single canvas dryer which is wound around and transported while sequentially passing between the top dryer drum and the bottom dryer drum and the canvas, a number of holes are formed in the peripheral wall of the bottom dryer drum. A single canvas dryer, wherein the bottom dryer drum is used as a suction roll. 2. The method for remodeling a single canvas dryer according to claim 1, wherein a stabilizer is attached to an upper position of the bottom dryer drum after a large number of holes are formed in the peripheral wall portion. 3. A plurality of top dryer drums and a plurality of bottom dryer drums are arranged in upper and lower two stages, and the top dryer drum and the bottom dryer drum are arranged in contact with each other so that endless canvases are alternately wound around the top dryer drum and the bottom dryer drum. A base frame extending in the drum axis direction adapted to be held by the top dryer drum in a single canvas dryer adapted to be wound around and transported while sequentially passing between the top dryer drum and the bottom dryer drum and the canvas; A drilling device comprising: a plurality of drills arranged in a drum axis direction and assembled downward so as to be movable in a drum axis direction and a vertical direction on a base frame.