JPH10237786A - Press device in paper machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve dehydrating ability of the first press to reduce the drying load of a drier in a drier part. SOLUTION: This press device in a paper machine has plural pairs of combination presses consisting of upper press rolls and lower press rolls arranged in a line so that a wet paper 3 may travel through the plural pairs of the rolls one by one. The upper press roll or the lower press roll of the first press 1P is formed into a suction roll 12 and the lower press roll or the upper press roll is formed into a shoe roll 13. The concentration of the wet paper is increased by carrying out the dehydration by the suction roll while applying a larger nip pressure to the wet paper 3 traveling through the first press by the shoe roll 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine used for dewatering wet paper in a press part of a paper machine.

[0002]

2. Description of the Related Art Wet paper removes most of the water in the wire part, but still contains a considerable amount of water. Entanglement is not sufficient, causing a problem in strength. Therefore, in the press part, the wet paper is mechanically pressed and dewatered, and then sent to the dryer part.

[0003] There are various types of press devices used in the press part of a paper machine in relation to the thickness and speed of paper. As shown in FIG. 3, an example of a straight-through type is a combination of three sets of an upper press roll 1 and a lower press roll 2, and a first press 1P, a second press 2P, and a third press, respectively. After forming the 3P, the wet paper web 3 sent from the upstream together with the felt 11 is passed in the same direction in the first press 1P and the second press 2P, and the direction is changed by the third press 3P and passed therethrough. Only the paper 3 is sent downstream through the smoother 4.

[0004] Also, a combined type as another type is
As shown in FIG. 4, a first press 1P is formed by an upper press roll 5 and a lower press roll 6, and a press roll 7 used as a center roll at a position obliquely above the upper press roll 5 of the first press 1P, as shown in FIG. Is formed, a second press 2P is formed by the press rolls 5 and 7, a press roll 8 is disposed above the press roll 7 of the second press 2P, and a third press is formed by the press rolls 7 and 8.
A press 3P is formed, and further downstream of the third press 3P,
A fourth press 4P is formed by the upper press roll 9 and the lower press roll 10, and the wet paper 3 sent from the upstream is formed.
Is sequentially passed through the presses 1P, 2P, 3P, and 4P together with the endless felt 11 which is appropriately wound, and then sent downstream through the smoother 4.

[0005]

However, in any of the press machines of the above types, in order to increase the density of the wet paper web after pressing, it is necessary to increase the density from the first press 1P. Although it is necessary to improve the dewatering ability from one press 1P, there is a limit to the ability improvement in the first press 1P using a combination of ordinary press rolls.

[0006] Therefore, the present invention is intended to improve the dewatering ability of the first press.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a press machine for a paper machine in which a plurality of presses each comprising an upper press roll and a lower press roll are arranged and arranged. On forming the press,
One of the lower press rolls is a suction roll, and the first press is formed, and the other of the lower press rolls is a shoe roll.

When wet paper is passed through the first press, moisture is removed by suction rolls. At this time, since a large nip is applied by the action of shoe rolls, effective dewatering is performed. become.

A first press is formed by an upper press roll and a lower press roll, and a second press is formed by an upper press roll of the first press and a center roll disposed on a side portion of the upper press roll. In the press machine for a paper machine, the upper press roll forming the first press is a suction roll, the lower press roll is a shoe roll, and a bearing housing for the suction roll and a bearing housing for the shoe roll are provided. And an integral structure, the above-mentioned suction roll is suspended and supported in a swinging manner in a direction in which the suction roll approaches and separates from the center roll, and a suction roll is mounted on a bearing housing of the suction roll. Combined with a pressing device for pressing against the center roll In this case, the operation of the pressing device allows the suction roll to be pressed against the center roll from the side while maintaining the relationship with the shoe roll, so that even if the rubber cover on the suction roll surface is reduced, the predetermined nip pressure is maintained. , And at the same time, bending deformation of the suction roll can be effectively prevented.

[0010]

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

FIG. 1 shows an embodiment of the present invention. In a press machine of a paper machine having a configuration similar to that shown in FIG. 3, an upper press roll for forming a first press 1P and a suction roll 12 are formed. At the same time, the lower press roll is used as a shoe roll 13, and while applying a large nip pressure to the shoe roll 13, the moisture of the passing wet paper web 3 can be removed by the suction roll 12. Note that the relationship between the suction roll 12 and the shoe roll 13 may be upside down.

With the above configuration, when the wet paper web 3 passes through the first press 1P, moisture is sucked and removed by the suction roll 12;
As a result, a large nip pressure is applied, so that effective dehydration is performed. As a result, the dewatering capacity of the first press 1P can be significantly improved as compared with the conventional case of simply using the upper and lower press rolls 1 and 2. Accordingly, when the wet paper web 3 passes through the first press 1P, the second press 2P, and the third press 3P, the density increases, so that it is possible to contribute to the reduction of the drying load in the downstream dryer part.

Next, FIG. 2 shows another embodiment of the present invention. In a press machine of a paper machine having a structure similar to that shown in FIG. 4, an upper press roll of a first press 1P is replaced with a suction roll. 12, the lower press roll of the first press 1P is a shoe roll 13, and the bearing housing 14 of the suction roll 12 and the bearing housing 15 of the shoe roll 13 are connected by an anchor 16 to form an integral structure. Support pins 17 arranged
Then, the suction roll 12 is suspended and supported so as to be swingable in a direction of approaching and separating from the press roll 7 as a center roll.
A cylinder 18 as a pressing device for adjusting the pressing force of the suction roll 12 against the press roll 7 is connected to the vicinity of the bearing housing 14.

With the configuration shown in FIG. 2, the dewatering of the wet paper web 3 can be performed efficiently by the suction roll 12 and the shoe roll 13 as in the embodiment of FIG. The two presses 2P can be stabilized. That is, the suction roll 12 is usually
Since the rubber cover is provided on the surface, the thickness is reduced by use. For this reason, it is necessary to displace so as to press against the press roll 7 as a center roll. At this time, if the relationship with the shoe roll 13 is shifted, a predetermined nip pressure in the first press 1P is obtained. Will be gone. However, in the case of the configuration shown in FIG. 2, the bearing housing 14 of the suction roll 12 and the bearing housing 1 of the shoe roll 13
5 has an integral structure, so that even if the suction roll 12 is oscillated about the support pin 17 by the operation of the pressing cylinder 18, the relationship between the suction roll 12 and the shoe roll 13 is shifted. However, the nip pressure of the second press 2P can be maintained at a predetermined pressure.

In the above, the suction roll 12
Receives a pressing force from the shoe roll 13, a deformation force acts on the roll shell, or, as described above, the suction roll 12 can be positively pressed against the side press roll 7. Can be prevented, and the roundness can be easily maintained.

The present invention is not limited to the above-described embodiment. For example, the structure adopted in the straight-through type shown in FIG. 1 may be adopted in the combined type shown in FIG. The first press 1P shown in FIG. 4 shows a combination of the roll 12 and the shoe roll 13.
May be used in place of the upper press roll 5 and the lower press roll 6, and the suction roll 12 as the upper roll may be disposed away from the press roll 7 as the center roll. Of course, various changes can be made within a range not to be performed.

[0017]

As described above, according to the press for a paper machine of the present invention, the following excellent effects are exhibited. (1) In a press machine of a paper machine in which a plurality of sets of presses consisting of an upper press roll and a lower press roll are arranged and installed, one of the upper and lower press rolls forming a first press is suctioned. The first press is formed, and the other press roll of the lower press roll is formed as a shoe roll. Therefore, in the first press, a state in which a large nip pressure is applied to the shoe roll. Thus, the dewatering of the wet paper can be efficiently performed by the suction roll, whereby the dewatering ability of the first press can be greatly improved, which can contribute to the reduction of the drying load in the dryer part. (2) A first press is formed by an upper press roll and a lower press roll, and a second press is formed by an upper press roll of the first press and a center roll arranged on a side portion of the upper press roll. In the press machine of the paper machine, the upper press roll forming the first press is a suction roll, the lower press roll is a shoe roll, and a bearing housing of the suction roll and a bearing housing of the shoe roll are formed. As an integral structure, the suction roll is suspended and supported by a support pin arranged above in such a manner that the suction roll is swingable in a direction approaching and separating from the center roll, and the suction roll is mounted on a bearing housing of the suction roll. By connecting the pressing device for pressing against Since the suction roll can be pressed against the center roll from the side while maintaining a constant relationship with the shoe roll, even if the thickness of the rubber cover on the surface of the suction roll is reduced, a predetermined nip pressure is favorably maintained. At the same time, the bending deformation of the suction roll can be effectively suppressed, and the second press can be stabilized.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an embodiment of a press machine of a paper machine according to the present invention.

FIG. 2 is a schematic diagram showing another embodiment of the present invention.

FIG. 3 is a schematic diagram of a straight-through type showing an example of a press machine of a paper machine.

FIG. 4 is a schematic diagram of a combined type showing another example of a press machine of a paper machine.

[Explanation of symbols]

 1P 1st press 2P 2nd press 1 Upper press roll 2 Lower press roll 7 Press roll (center roll) 12 Suction roll 13 Shoe roll 14, 15 Bearing housing 17 Support pin 18 Cylinder (Pressing device)

Claims (2)

[Claims] In a press machine of a paper machine in which a plurality of presses each including an upper press roll and a lower press roll are arranged and installed, a first press is formed.
A papermaking machine characterized in that one of the lower press rolls is a suction roll, and the first press is formed, and the other of the lower press rolls is a shoe roll. Press equipment. 2. A first press is formed by an upper press roll and a lower press roll, and a second press is formed by an upper press roll of the first press and a center roll disposed on a side portion of the upper press roll. In the press machine for a paper machine, the upper press roll forming the first press is a suction roll, the lower press roll is a shoe roll, and a bearing housing for the suction roll and a bearing housing for the shoe roll are provided. And an integral structure, the above-mentioned suction roll is suspended and supported in a swinging manner in a direction in which the suction roll approaches and separates from the center roll, and a suction roll is mounted on a bearing housing of the suction roll. Has a configuration in which a pressing device for pressing against the center roll is connected A press machine for a paper machine.