JP2009195788A - Washing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide washing equipment in which the washing medium does not fall to a material to be washed without attaching the washing medium to the inner surface of a suction hood for sucking the washing medium reflected by the material to be washed upon the washing by spraying the washing medium to the material to be washed such as a dryer canvas and the like used for paper preparation. <P>SOLUTION: The washing equipment jets high pressurized washing water from a washing nozzle 8 (drawing 4) housed in the suction hood 2 to the dryer canvas C and recovers the reflected washing water by sucking the same from the suction hood 2. The equipment is provided with a chamber part 4 at the lower edge of the outer peripheral surface of the suction hood 2 and a nail part 10b expanded to a position facing the lower edge part while forming the lower edge part of the suction hood 2 and a gap G on the end portion of the outer wall of the chamber part 4. The pressurized air is jetted from the gap G. The jetted pressurized air is allowed to rise along the inner wall surface of the suction hood 2 by means of the Coanda effect by forming the shape of the lower edge fringe of the suction hood 2 into the circular arc. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cleaning device suitable for cleaning a traveling sheet-like material such as a dryer canvas that winds and presses paper around a dryer cylinder at a dry part in a paper machine.

  For example, in a paper machine, water in which papermaking material is dispersed and melted is sprayed onto a wire formed of a wire mesh that moves endlessly in a wire part, and a paper layer is formed while moisture is dehydrated as the wire travels. The Then, it is crushed and squeezed by a press roll in the press part, and dried while being wound around a dryer cylinder in which superheated steam is supplied inside. Thereafter, smoothness and gloss are imparted by the calendar part to produce paper. Next, the manufactured paper is wound on a reel by a reel part to form a winding.

  In the dry part, a dryer canvas is used to wind paper around a dryer cylinder and press it. The dryer canvas is, for example, made of plastic woven with synthetic fibers such as polyester, and is wound around an appropriate number of dryer cylinders mainly constituting one group so as to endlessly circulate. It is. The paper is wound around a dryer cylinder in a state of being superimposed on the dryer canvas.

  Since the surface with which the paper contacts the dryer canvas is constant, the wet paper powder of the paper in the middle of drying may adhere to the surface of the dryer canvas and become contaminated. When the paper is pressed against the dryer cylinder with the wet paper dust attached, the wet paper powder presses the surface of the paper and dents it, causing clogging of the dryer canvas and reducing the drying efficiency. There is a risk of damaging the paper quality.

  For this reason, a cleaning device is provided for cleaning the dryer canvas for removing wet paper dust and the like adhering to the dryer canvas. Since this type of cleaning device has a constant contact surface with the paper of the dryer canvas, by spraying cleaning water onto the surface of the dryer canvas that contacts the paper, wet paper dust and the like adhering to the contact surface is removed. Blow away and remove. For example, this type of cleaning device is disclosed in Patent Document 1, and the cleaning device disclosed in Patent Document 1 includes a container whose one end is opened to an object to be cleaned, and an external device that sucks the internal space of the container. A structure including a suction source and a nozzle for injecting a cleaning medium toward an object to be cleaned under high pressure through the internal space is employed.

JP 2000-070888 A

  In the cleaning device, the inside of the container sucks the cleaning medium that is sprayed toward the object to be cleaned and reflected by the surface of the object to be cleaned, and sucks and discharges the cleaning medium through the container. At this time, the cleaning medium is sucked together with the air around the container sucked from the lower end of the container. In this case, when the cleaning medium passing through the container is not sufficiently sucked, it adheres to the inner wall surface of the container. When the adhered object to be cleaned grows and grows gradually, it may drop from the lower end of the container and drop onto the object to be cleaned. The dropped cleaning medium may adhere to the object to be cleaned and contaminate the cleaned object again. In particular, when the object to be cleaned is a dryer canvas, it moves endlessly, so that the contaminated portion comes into contact with the paper to be dried, thereby hindering the drying of the paper. Moreover, there is a possibility of causing a paper break.

  Therefore, the present invention is a cleaning device that can prevent suction of the cleaning medium and adhere to the inner wall of the container as much as possible, and eliminates the cleaning medium from dripping from the container. Particularly, the cleaning water is used as the cleaning medium. It is an object of the present invention to provide a cleaning device suitable for removing wet paper dust and the like adhering to a dryer canvas.

  As a technical means for achieving the above object, a cleaning apparatus according to the present invention includes a cleaning nozzle for injecting a cleaning medium into a cylindrical suction hood arranged with one end facing an object to be cleaned, In the cleaning apparatus that sprays the cleaning medium sprayed from the cleaning nozzle onto the object to be cleaned to remove contaminants attached to the object to be cleaned, and sucks the inside of the suction hood to suppress the scattering of the cleaning medium. A chamber portion is provided on an outer peripheral portion of the lower end portion of the suction hood, and a claw portion extended to a position facing the lower end portion of the suction hood is provided at a lower end portion of the wall body of the chamber portion. A gap is formed between the lower end portion of the hood, an accompanying medium is supplied to the chamber portion, and the accompanying medium is blown out from the gap. The accompanying medium blown out from the gap is sucked along the inner wall surface of the suction hood. A axial hood is characterized in that a shape for guiding to flow in the upward direction is formed a lower end of the suction hood.

  When an accompanying medium such as compressed air is supplied to the chamber portion, the accompanying medium is blown out from the gap. The accompanying medium blown out from the gap is guided to the lower end portion of the suction hood and flows in the upward direction along the inner wall surface of the suction hood. In order to achieve the flow of the accompanying medium, for example, the cross-sectional shape of the edge of the suction hood is formed into a shape that becomes a part of the arc, and the so-called Coanda effect is exhibited in which the accompanying medium is guided to the arc surface. Like that. The accompanying medium sucked is discharged to the outside of the suction hood. In this case, if the suction pipe is connected to the suction hood and the inside of the suction hood is sucked through the suction pipe, the accompanying medium flows through the suction pipe and is discharged.

  On the other hand, a cleaning medium is ejected from the cleaning nozzle to clean the object to be cleaned. A part of the cleaning medium sprayed toward the object to be cleaned reflects off the object to be cleaned. At this time, the cleaning medium reflected near the lower end of the suction hood is sucked along with the flow of the accompanying medium, and the accompanying medium is discharged to the outside of the suction hood.

  According to a second aspect of the present invention, there is provided a cleaning device including a cleaning nozzle device provided with a cleaning nozzle that rotates about an axis of the suction hood in the suction hood, and the cleaning nozzle is provided with the cleaning nozzle. The cleaning medium is ejected from a drive nozzle disposed on the peripheral wall surface of the rotating drum, and the cleaning nozzle is disposed on the bottom surface of the rotating drum.

  In order to efficiently clean the object to be cleaned, the cleaning device is moved relative to the object to be cleaned. In this case, in order to move with a simple structure, it is preferable to move the cleaning device back and forth linearly, and the cleaning nozzle ejects the cleaning medium while moving back and forth linearly as the cleaning device moves. . In addition to this linear movement, it is possible to perform cleaning with higher efficiency by spraying the cleaning water while circularly moving the cleaning nozzle. For this reason, there is a cleaning device having a structure in which the cleaning nozzle is rotated in the suction hood. In this type of cleaning apparatus, a cleaning nozzle is disposed at a position on the bottom surface of the rotating drum that is deviated from the rotation center of the rotating drum, and the cleaning medium is sprayed on the peripheral wall surface of the rotating drum in the tangential direction of the peripheral wall surface. Some drive nozzles have a structure that includes a revolving nozzle that rotates a rotating drum by a reaction force that ejects a cleaning medium from the drive nozzle. Some have a structure in which a plurality of cleaning nozzles are provided. For this reason, the cleaning nozzle reciprocates along with the cleaning device while turning by the rotation of the rotating drum, and the cleaning medium can be sprayed over a wide range, thereby improving the cleaning efficiency. In such a structure, since the cleaning medium sprayed from the drive nozzle is directly sprayed on the inner wall surface of the suction hood, the cleaning medium easily adheres to the inner wall surface of the suction hood. However, the cleaning medium to be attached to the inner wall surface is discharged to the outside of the suction hood as the accompanying medium flows.

  The cleaning apparatus according to the invention of claim 3 is characterized in that the object to be cleaned is a dryer canvas, and the dryer canvas is cleaned using the cleaning medium as cleaning water.

  That is, this cleaning device is disposed in the dry part of the paper machine and used for cleaning the dryer canvas. Since the dryer canvas is wound around the dryer cylinder and circulates endlessly, the cleaning device is disposed after the final dryer cylinder after a series of processes. Thus, in the state where the first dryer cylinder is returned, the paper is guided by the washed dryer canvas.

  According to the cleaning device of the present invention, it is possible to prevent the cleaning medium from dropping from the suction hood as much as possible. Therefore, it is possible to prevent the cleaned object to be contaminated again and to perform a predetermined process with the object to be cleaned that is as clean as possible. For this reason, the yield of the product processed with this to-be-cleaned object can be improved.

  According to the cleaning device of the second aspect of the present invention, when the cleaning medium is used other than the cleaning of the object to be cleaned in order to improve the cleaning efficiency, that is, the suction hood is used to rotate the rotating drum. Even when it is structured to spray toward the inner wall surface, the cleaning medium sprayed on the inner wall surface is reliably sucked and discharged, so that the improvement of the cleaning efficiency is not hindered and the cleaning efficiency is improved. A good cleaning device can be obtained.

  According to the cleaning device of the third aspect of the present invention, the dryer canvas can be reliably cleaned and the dryer canvas can be kept clean. For this reason, while improving the drying efficiency of the paper in the dry part using this dryer canvas, the quality of the manufactured paper can be maintained.

  The cleaning apparatus according to the present invention will be specifically described below based on the preferred embodiments shown in the drawings. In this embodiment, a cleaning device for a dryer canvas used in a dry part of a paper machine is illustrated.

  As shown in FIGS. 1 and 2, the cleaning device 1 is disposed so as to face the dryer canvas C, and is orthogonal to the traveling direction P of the dryer canvas C, that is, a direction orthogonal to the paper surface of FIG. Are supported so as to enable reciprocal linear movement. The cleaning device 1 includes a cylindrical suction hood 2, a swivel nozzle device 3 accommodated in the suction hood 2, and a chamber disposed in an annular shape on the outer peripheral surface of the lower end portion of the suction hood 2. Part 4.

  An opened lower end portion of the suction hood 2 is arranged in a state of facing the dryer canvas C. A suction pipe 5 is connected to the upper end portion of the suction hood 2 through a suction hole 5a (shown in FIG. 1) so as to communicate with the inside of the suction hood 2. The suction hood 2 is connected to the suction hood 2 through the suction pipe 5. Is communicated with the gas-liquid separator 6. In addition, an ejector 7 is disposed at an intermediate portion of the suction pipe 5, and the inside of the suction hood 2 is sucked by an ejector effect by the operation of the ejector 7.

  Further, in the swivel nozzle device 3, a rotating drum 3a formed in a cylindrical shape with a bottom is rotatable about the axis of the suction hood 2 with respect to the drum support 3b. FIG. 4 shows the bottom surface of the rotating drum 3a, and a pair of cleaning nozzles 8 are provided at positions offset from the rotating shaft O. The spraying direction of the cleaning nozzle 8 is a direction orthogonal to the bottom surface. A pair of drive nozzles 9 is provided on the peripheral wall of the rotating drum 3a. The ejection direction of these drive nozzles 9 is a tangential direction of the peripheral wall of the rotating drum 3a and is a direction of couple. As will be described later, the injection directions of these drive nozzles 9 are directed obliquely upward, that is, in the direction opposite to the opened end of the suction hood 2 as indicated by an arrow Q in FIG. Is preferred.

  In addition, a connection portion 3c for connecting a tube body such as a hose is provided on the upper portion of the drum support 3b. The connection 3c communicates with the inside of the rotary drum 3a through the drum support 3b. I'm allowed. For this reason, when a pipe body is connected to the connecting portion 3c and a cleaning medium such as high-pressure water is supplied from the pipe body, it reaches the inside of the rotating drum 3a, and the cleaning medium is jetted from the cleaning nozzle 8 and the drive nozzle 9. Will be.

  A flange portion 2 a is formed at the center of the side surface of the suction hood 2, and an annular chamber lid body 10 is attached to the flange portion 2 a with an attachment screw 11. A receiving seat 2b is provided at the lower portion of the flange 2a. The inner peripheral surface of the chamber lid 10 is pressed against the outer peripheral surface of the receiving seat 2b, and the upper end surface of the chamber lid 10 is pressed against the lower surface of the flange 2a. It is made to do. A recess 2c is formed on the outer peripheral surface of the receiving seat 2b. A seal member 12 such as an O-ring is accommodated in the recess 2c, and the chamber lid 10 is pressed against the seal member 12 in the state where the seal member 12 is pressed. Airtightness is ensured at the seal member 12 portion. The chamber portion 4 is formed by a space portion formed in a portion sandwiched between the chamber lid 10 and the suction hood 2 below the receiving seat portion 2b. A supply port 10 a for supplying an accompanying medium such as compressed air to the chamber portion 4 is provided at an appropriate position on the outer peripheral portion of the chamber lid 10. A claw portion 10b extended to a position facing the lower edge of the suction hood 2 is formed at the lower end portion of the chamber lid body 10, and a gap G is formed between the claw portion 10b and the suction hood 2. Yes. That is, the chamber portion 4 is opened by the gap G. On the other hand, the lower end edge of the suction hood 2 is formed in a substantially arc shape in cross section, and the accompanying medium blown out from the gap G flows along the surface along the inner wall surface of the suction hood 2 by the so-called Coanda effect. And is guided to flow in the upward direction. Note that the accompanying medium may be reliably guided by curving the tip of the claw portion 10b along the shape of the lower end of the suction hood 2. Further, it is preferable that the size of the gap G can be adjusted by adjusting the mounting position of the chamber lid 10 by the mounting screw 11.

  The operation when the dryer canvas is cleaned using the cleaning apparatus 1 according to the present invention configured as described above will be described below.

  When high-pressure cleaning water as a cleaning medium is supplied from a pipe body (not shown) connected to the connection portion 3c, the cleaning medium is supplied to the inside of the rotating drum 3a. When the cleaning medium is ejected from the drive nozzle 9 provided on the peripheral wall of the rotating drum 3a, the rotating drum 3a rotates with respect to the drum support 3b by the reaction force. Further, high-pressure washing water is jetted from the washing nozzle 8 provided on the bottom surface of the rotating drum 3a and sprayed onto the dryer canvas C. At this time, the cleaning nozzle 8 injects high-pressure cleaning water while turning around the rotation axis O of the rotating drum 3a as the rotating drum 3a rotates. Further, high-pressure cleaning water is jetted from the cleaning nozzle 8 while the cleaning device 1 moves in a direction orthogonal to the traveling direction of the dryer canvas C. As a result, the dryer canvas C is efficiently washed and contaminants such as wet paper dust are removed.

  The high-pressure washing water sprayed from the washing nozzle 8 and sprayed on the dryer canvas C passes through the dryer canvas C to eliminate clogging and the like, but a part of the high-pressure washing water is reflected on the surface of the dryer canvas C and heads for the washing apparatus 1. There is something. Since the inside of the suction hood 2 of the cleaning device 1 is sucked by the ejector 7 through the suction pipe 5, the high-pressure cleaning water that is reflected and directed toward the cleaning device 1 is sucked into the suction hood 2.

  On the other hand, high-pressure air is supplied as an accompanying medium to the chamber portion 4 from the supply port 10a. The high-pressure air supplied to the chamber part 4 is discharged from the gap G. At this time, the discharged high-pressure air flows along the arc surface of the lower end edge of the suction hood 2 and flows along the inner wall surface of the suction hood 2 due to the Coanda effect. Therefore, the high-pressure washing water sucked into the suction hood 2 is surely sucked into the suction hood 2 along with the flow of the high-pressure air. The high-pressure washing water sprayed from the drive nozzle 9 is sprayed on the inner wall surface of the suction hood 2. The sprayed high-pressure washing water flows along with the high-pressure air flowing along the inner wall surface. The suction pipe 5 is sucked. That is, the high-pressure washing water reflected by the dryer canvas C and the high-pressure washing water jetted from the drive nozzle 9 are both guided by the flow of high-pressure air discharged from the chamber portion 4 through the gap G. As a result, the suction pipe 5 is efficiently sucked. Therefore, it does not adhere to the inner wall surface of the suction hood 2 and is prevented from falling on the dryer canvas C as much as possible.

  As described above, if the jet direction of the drive nozzle 9 is obliquely upward, the high-pressure air flowing along the inner wall surface of the suction hood 2 is well captured and the flow of the high-pressure air is reduced. It is more preferable because it is accompanied.

  According to the cleaning device of the present invention, when the scattering medium is prevented from scattering by sucking the cleaning medium reflected by the object to be cleaned from the suction hood, the cleaning medium does not adhere to the inner wall of the suction hood. The cleaning medium does not fall on the object to be cleaned. For this reason, the cleaned object is not contaminated, and the object to be cleaned can be used in a clean state. In particular, when used for cleaning a dry canvas in which a dry part in a paper machine is circulated endlessly, the dry canvas can be reliably cleaned, contributing to the stabilization of the quality of the paper to be produced.

It is sectional drawing for demonstrating the schematic structure of the washing | cleaning apparatus which concerns on this invention. It is a figure explaining the system which attracts | sucks the high-pressure washing water reflected with the dryer canvas by the washing | cleaning apparatus which concerns on this invention. It is a perspective view explaining a turning nozzle device. FIG. 4 is a bottom view of the rotating drum shown in FIG. 3.

Explanation of symbols

C Dryer canvas (object to be cleaned)
G Gap 1 Cleaning device 2 Suction hood
2a Flange 3 Rotating nozzle device
3a Rotating drum
3b drum support
3c Connection part 4 Chamber part 5 Suction tube 6 Gas-liquid separator 7 Ejector 8 Cleaning nozzle 9 Drive nozzle
10 Chamber lid
10a Supply port
10b Claw

Claims (3)

A cleaning nozzle that injects a cleaning medium into a cylindrical suction hood that is arranged with one end facing the object to be cleaned is provided, and the cleaning medium sprayed from the cleaning nozzle is sprayed onto the object to be cleaned. In the cleaning apparatus that removes adhering contaminants and suppresses scattering of the cleaning medium by sucking the inside of the suction hood,
A chamber is provided on the outer periphery of the lower end of the suction hood,
At the lower end of the wall of the chamber portion, a claw portion extended to a position facing the lower end of the suction hood is provided,
Forming a gap between the claw and the lower end of the suction hood;
Supplying an accompanying medium to the chamber part, and blowing out from the gap;
The lower end of the suction hood is formed in a shape that guides the accompanying medium that has blown out from the gap to flow in the axial direction of the suction hood along the inner wall surface of the suction hood. A cleaning device characterized by.   In the suction hood, there is provided a swiveling nozzle device having a cleaning nozzle that revolves around the axis of the suction hood, and the cleaning nozzle is swung from a drive nozzle disposed on a peripheral wall surface of a rotating drum having the cleaning nozzle. The cleaning apparatus according to claim 1, wherein the cleaning nozzle is disposed on a bottom surface of the rotating drum.   The cleaning apparatus according to claim 1, wherein the object to be cleaned is a dryer canvas, and the dryer canvas is cleaned using the cleaning medium as cleaning water.

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