JPH06166983A - Roll washing machine - Google Patents

Abstract

PURPOSE:To conduct automatic washing of a suction roll of a papermaking machine in a short time. CONSTITUTION:This roll washing machine is equipped with a means 2 to revolvably support a suction roll 1, a washing head 3 supported movably toward the shaft outside the roll 1 supported and to spray a washing liquid toward the roll surface, and a discharge tray 13 to receive the washing liquid passed through a suction hole 8 of the roll inside the roll and guide the liquid outside the roll. It is effective that the washing head be fitted with plural jet nozzles to spray washing liquid on the roll surface at angles of incidence differing from one another. The washing liquid passed through the suction hole is advanced straight and blown onto a second suction hole facing thereto, thus effectively discharging foreign substances removed out of the suction roll without debonding the rubber lining on the outer surface of the suction roll.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll washer mainly for a suction roll attached to a paper machine and using a jet of high pressure wash water.

[0002]

2. Description of the Related Art A suction roll for dehydration mounted on a paper machine usually has a length of 1900 to 3500 mm and an outer diameter of 500 to 1200 mm, but a large roll has a length of 9 m. . Most have a wall thickness of 40-50 mm
The outer surface of the steel pipe is rubber-lined to a thickness of about 25 mm, and the rubber lining side has a diameter of 2.8 to 3.2 mm and the steel pipe side has a through-hole with a diameter of about 4.5 mm, that is, suction. Many holes are provided. While rotating this suction roll, the inside of the roll is depressurized, water is sucked inward from the fiber layer covering the outside through the suction hole, and the water is dehydrated. Since the suction holes of the suction roll gradually become clogged during long-term use, and the dewatering ability decreases,
It is necessary to clean this blockage at the appropriate time. In the past, the suction holes were cleaned one by one with an electric drill to remove the clogged foreign matter.

[0003]

However, since the number of suction holes is very large, the work for removing the clogging of the holes is a heavy labor requiring a lot of labor and a long time. In order to solve this problem, it has been attempted to remove high-pressure water from the outside of the roll to remove clogging of the holes, but it is not possible to sufficiently enhance the effect of removing foreign matter that adheres to the inner wall of the holes. Japanese Examined Patent Publication No. 63-14120 proposes a roll cleaning device in which a guide rail is inserted inside a roll and a rotatable injection nozzle is moved along the guide rail. But,
A complicated mechanism is required to rotatably configure the injection nozzle, and the rubber layer overhanging the opening of the steel pipe body may be impacted and the rubber lining may peel off. The inventor of the present invention has reached the present invention as a result of researching a simple device that can reliably remove clogging of the suction roll in a short time without requiring a great labor.

[0004]

According to the present invention, there is provided roll supporting means for rotatably supporting a suction roll to be cleaned having a plurality of suction holes, and rotatably supported outside the supported roll in the axial direction of the roll. And a cleaning head for ejecting the cleaning liquid toward the roll surface, and a drain tray for receiving the cleaning liquid ejected from the cleaning head passing through the suction holes of the roll inside the roll and guiding the cleaning liquid to the outside of the roll. A roll washer characterized by the above. Further, there is provided a roll cleaning machine in which the cleaning head is provided with a plurality of spray nozzles for spraying the cleaning liquid onto the roll surface at different incident angles.

[0005]

Embodiments and Functions First, the main features of the roll cleaning machine of the present invention will be described. Note that this order of description has nothing to do with importance. First of all, a discharge tray is provided for collecting and discharging the foreign matter in the suction hole discharged inside the roll by the cleaning liquid jetted from the outside of the suction roll toward the suction hole of the roll together with the cleaning liquid. . Secondly, in order to prevent peeling of the rubber lining and simplify the structure, the cleaning liquid is basically sprayed from the roll surface side. Thirdly, the suction roll is rotatably supported so that the cleaning position on the roll surface can be easily and automatically moved, while the cleaning head is supported in the axial direction of the roll on the outside of the supported roll. It is movably installed. Further, the cleaning head of the roll cleaning machine of the present invention may be provided with a single injection nozzle, but by providing a plurality of injection nozzles, it is possible to efficiently perform cleaning in a wide range at the same time. This is very preferable because the angle can be changed. In addition, in order to effectively remove the foreign matter clogged in the suction hole,
It is preferable that the cleaning liquid be linearly sprayed from a plurality of spray nozzles to the suction hole that opens toward the central axis, at different incident angles. In addition, in order to improve the cleaning efficiency, a similar cleaning head may be provided inside the roller.

A more detailed description will be given below with reference to the drawings showing a preferred embodiment of the roll washer of the present invention. FIG. 1 is a schematic cross-sectional view of a roll washer of the present invention, and FIG. 2 is a schematic side view showing a partial cross section of the roll washer of the present invention. 3A and 3B are explanatory views of the cleaning of the present invention, in which FIG. 3A is an explanatory view of an injection portion, FIG. 3B is an enlarged view of a part thereof, and FIG. It is a figure which shows the projection of a nozzle. The cleaning liquid used in the roll cleaning machine of the present invention usually uses appropriate pressurized water, but depending on the deposit, a suitable chemical agent is added,
Alternatively, a drug solution can be used. In the following embodiments, the case of using high-pressure washing water will be described.

In the roll cleaning machine of the present invention, the suction roll 1 to be cleaned is rotatably supported so as to move the cleaning position during cleaning. The supporting means is preferably supported by four supporting rolls 2 including a driving roll. Although other known supporting means may be used, there is an advantage that suction rolls having different outer diameters can be easily set and the peripheral speed can be kept constant. A suitable rotation speed is usually about 0.5 to 5 rpm. A cleaning head 3 is provided outside the supported roll 1 so as to be relatively movable in the axial direction of the roll 1.
Cleaning water is jetted from the cleaning head 3 toward the surface of the suction roll 1. At that time, the cleaning head 3 is usually moved. By rotating the suction roll 1 and moving the cleaning head 3 during cleaning, the suction roll 1 can be uniformly cleaned. The moving means 4 of the cleaning head 3 is
A known means such as a rail or a feed bolt may be adopted.

By providing the cleaning head 3 with a plurality of jet nozzles 5, it is of course possible to widen the range of simultaneous cleaning, but in the roll cleaning machine of the present invention, preferably, for example, as shown in FIG. In addition, the washing water from the plurality of injection holes 6 is incident on the roll surface 7 at different incident angles θ.
By spraying with 1, θ2, θ3, suction holes 8,
The inside of 8'can be spray cleaned from different angles. Therefore, it is preferable that the cleaning water is sprayed in a rod shape instead of being sprayed in a fan shape as conventionally used, because the cleaning power is large and the insides of the absorption holes 8 and 8'can be effectively cleaned. The incident angle θ is an angle at which the jet center line a of the wash water intersects a line b perpendicular to the tangent surface of the roll 1 surface, that is, a normal line. The range of the appropriate incident angle θ varies depending on the thickness of the suction roll and the condition of clogging, but is generally 0 to 30.
It is preferable to set the temperature to 0 to 20 degrees. The incident angle θ can be taken not only in the XY directions on the drawing but also in the Z direction perpendicular to the drawing in addition to this. Incident angle θ
Does not have to be all different for each spray nozzle, but may be partly the same for sufficient cleaning. The pressure of the wash water to be used varies depending on the subject, but generally, it is preferably about 30 to 80 kg / cm ² .

A preferred specific embodiment of the cleaning head 3 will be described. First, cleaning water is sprayed in parallel from the plurality of spray nozzles 5 toward the roll surface 7. Thus, the cleaning head 3 which sprays the cleaning water in the same direction can be manufactured at low cost. In this case, in order to make the incident angle θ of the wash water different, the array of the jet nozzles 5 is made to intersect the projection line d of the generatrix of the roller on the projection plane c orthogonal to the jetting direction (FIG. 3). (C), e is the position of the ejection nozzle 5 on the projection surface). In the figure, f indicates an example of the intersecting arrangement direction. That is, when all the spray nozzles are arranged on a line parallel to the generatrix and the cleaning water is sprayed, the suction holes 8
This is because the cleaning water will be sprayed at the same incident angle. Also, when the diameter of the suction roll 1 to be washed is different,
The layout of the suction holes 8 and the state of clogging may be different. In such a case, so that effective cleaning is possible,
Prior to the cleaning work, it is preferable to mount the cleaning head 3 so that the intersecting angle between the arrangement direction of the jet nozzles 5 and the projection line d of the roller shaft can be selectively set. Suction roll 1
The position of the cleaning head 3 with respect to is above the suction roll 1,
It may be laterally or in between, but the lower part is not desirable because it is necessary to provide the drain tray 13 described below.

On the other hand, inside the suction roll 1, it is necessary to provide a drainage tray 13 for receiving the cleaning water a'from the cleaning head 3 which has passed through the roll suction hole 8 and guiding the water to the outside of the roll in the axial direction. There is. This drain tray 13
It is more effective to mount it so as to incline downward toward the outside. Similarly, the second cleaning head may be provided inside the suction roll, and the cleaning water may be sprayed to the inner wall side of the roll at a relatively low pressure to clean the suction hole from the inside. It is effective for cleaning parts near the inside where cleaning water does not reach directly from the surface and parts that become blind spots when cleaning from the outside. The pressure of washing water sprayed from the inside is usually 20 to 60 kg.
/ Cm ² In this case, a drain tray that receives the wash water passing through the roll suction hole may be provided outside the suction roll. Further, if casters are attached to the second cleaning head, it is convenient because the casters are easily moved.

The roll washer of the present invention can be operated unattended and automatically. However, if the rotation of the suction roll 1 or the movement of the washing head 3 is stopped, washing water is sprayed at the same position for a long time. Since the rubber lining 10 may be damaged, in such a case, it is safe to provide a means for automatically stopping the injection of washing water.

[0012]

The roll washer of the present invention has a structure in which the cleaning liquid is sprayed from the surface side of the suction roll and the cleaning liquid passing through the suction hole is received by the drain tray and guided to the outside of the roll. The passed cleaning liquid goes straight ahead and is blown to the opposing suction holes, so that the rubber lining is not separated from the steel pipe side, and the removed foreign matter can be efficiently discharged to the outside of the suction roll.

In the roll cleaning machine of the present invention, when a rod-shaped cleaning liquid is jetted from the surface side of the suction roll toward the suction holes at different incident angles, the clogging of the suction holes is impacted from different angles. It can be removed effectively and without leaving foreign matter attached. Also, there is no risk of the rubber lining peeling off. The roll washer of the present invention has a low apparatus cost and has few problems in maintenance and inspection. It is also possible to add jet cleaning from the inner surface side.
It is a simple device that is easy to automate and that can safely and safely remove blockages in the suction roll within a short time with a small amount of labor.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a roll washer of the present invention.

FIG. 2 is a schematic side view showing a partial cross section of the roll washer of the present invention.

3A and 3B are explanatory views of cleaning, in which FIG. 3A is an explanatory view of an injection portion, FIG. 3B is an enlarged view of a part thereof, and FIG. FIG.

[Explanation of symbols]

1: Suction roll 2: Support roll 3: Cleaning head 4: Moving means 5: Injection nozzle 6: Injection hole
7: Roll surface 8, 8 ': Suction hole 9: Drain tray 10: Rubber lining 11: Steel pipe

Claims (2)

[Claims] 1. A roll supporting means for rotatably supporting a cleaning suction roll having a plurality of suction holes, and a movably supported axially outside the supported roll.
A cleaning head for injecting a cleaning liquid toward the surface of the roll; and a drain tray for receiving the cleaning water ejected from the cleaning head passing through the suction hole of the roll inside the roll and guiding the water to the outside of the roll. Roll cleaning machine. 2. The roll cleaning machine according to claim 1, wherein the cleaning head is provided with a plurality of spray nozzles for spraying the cleaning liquid onto the surface of the roll at different incident angles.