JPH0280689A - Device for washing felt used for paper making - Google Patents

Abstract

PURPOSE:To efficiently wash and remove the strains of a felt by radiating ultrasonic waves to a washing solution contacting with the felt in the washing solution pocket of a washing nozzle. CONSTITUTION:When the stains of a felt 2 are detected with a stain-detector, water is supplied to the washing solution pocket 3 of a washing nozzle 31 and the magnetostrictive vibrator 31 of an ultrasonic oscillator is driven to radiate ultrasonic waves to a washing solution contacting with the felt in a washing solution pocket 3. A motor-driving operation is controlled with a detector detecting the stains of the felt 2 and an electric circuit for starting and stopping an ON-OFF switch 34 is disposed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention intensively cleans and eliminates dirt from press felts, wires, dryer canvases, belt conveyors, running rolls, etc. used in paper manufacturing. The present invention relates to a cleaning device for cleaning.

[Conventional technology]

- If S contains foreign substances that adhere to press felts or wires used in paper machines to transport paper sheets, such as fibers, fats and oils containing resin, hard substances such as sand, metal powder, and soil. It is known that cleaning water is jetted to remove these foreign substances because they are transferred to the paper sheet side and cause deterioration in quality.

Conventionally, in this type of shower device, a vibrator having a plurality of water supply nozzles attached in the width direction of the felt close to the traveling felt is slid in the width direction to perform a total of 111 washes. The amount of water used is large, and it is necessary to operate push buttons and valves on and off for each operation, which increases the work time and requires intermittent operation.
In many cases, it is not possible to remove areas with particularly bad stains or sticky stains, and the stains in the width direction of the felt are not constant, and some areas may be contaminated with a lot of dirt, making it impossible to clean them intensively. Place it on the machine and move it continuously in the r1 direction to intensively clean local dirt,
Efforts have also been made to improve the cleaning effect with a smaller amount of water and to save working time.

[Problem to be solved by the invention]

However, even in this conventional example, the water supply nozzle is structured so that it traverses the cleaning surface at a slow speed, so it can only be operated continuously at a set value that has been set in advance according to the machine speed, and it is difficult to detect dirt. The setting value conversion operation must be performed under the supervision of the operator, and it concentrates dirt that is difficult to remove, such as localized dirt, severe dirt, and sticky dirt that cannot be removed with fluids such as high-pressure water, hot water, or steam alone. This was a problem because it hindered the automation of cleaning.

The present invention accurately eliminates these conventional drawbacks, uses ultrasonic energy to properly and efficiently wash and remove hard-to-remove stains, and makes it possible to improve the safety and quality control of paper manufacturing operations. What's more, the ultrasonic energy is applied to the entire cleaning width (by concentrating the energy on one area, a large effect is achieved with a small amount of power, shortening work time and eliminating unnecessary operations, increasing reliability. It is an object of the present invention to provide a cleaning device for paper manufacturing felt, etc., which has greatly improved performance and easy maintenance and safety.

[Means to solve the problem]

The present invention provides a dirt cleaning device disposed close to a felt or the like that runs in contact with a paper sheet, and
A cleaning nozzle having a cleaning liquid pocket that is partially pressed against the felt and can be filled with cleaning liquid, in a felt cleaning apparatus for paper manufacturing, which is provided with a drive device for reciprocating the felt in a transverse direction. , a water supply channel that connects the cleaning liquid pocket to a water supply source, and an ultrasonic oscillator that emits ultrasonic waves to the cleaning liquid that is in contact with the felt within the cleaning liquid pocket 7, and controls the ultrasonic oscillation operation. This is a cleaning device for papermaking felt, etc., which is equipped with an electric circuit.

[For production]

In this cleaning device, in an example equipped with a dirt detection mechanism, the paper sheet 1 is cleaned by i! A dirt detector 4 is reciprocated in the width direction of the felt 2 by a driving chino 7 via a trolley 5 in close proximity to the felt 2 which is being conveyed to the next process. When the detector 4 detects dirt on the felt 2 during this run, water is supplied from the water supply source 10 through the electric valve 11 and pressed against the felt 2, and then fixed data is set as input data in advance. The input data processing unit 12 performs comparison processing and starts the magnetostrictive vibrator 31 of the ultrasonic oscillator with the cleaning liquid pocket 3.
The felt is vibrated at a frequency of ~500 k llz to clean the felt that comes into contact with the cleaning liquid in the cleaning liquid pocket 3, but the cleaning surface can be cleaned for any desired time. 36 to drive the cleaning nozzle 3
．． To clean paper sheets horizontally or at rest, and automatically switch to a continuous normal cleaning movement when the set time of cleaning is completed, enabling efficient operation and significantly facilitating and improving the quality control of paper sheets. Can be done.

〔Example〕

An example in which the present invention is applied to dryer felt will be described with reference to FIGS. 1 to 5. A paper sheet 1 is
A cleaning nozzle 3 which is placed close to the felt 2 which is placed on the felt 2 and is transported to the next process to clean dirt from the felt 2. and a drive motor 36 of a drive device to which the cleaning nozzle 3 is attached and for reciprocating the felt 2 on a bar 35 in a transverse direction, the drive motor 36 having a variable speed, for example. A drive device attached to a motor or a motor with a speed reduction mechanism, for example, instead of the bar 35, it may be connected to a drive chino or a belt or other transmission member to enable reciprocating movement, and may be partially pressed against the felt 2. a cleaning nozzle 3I with a cleaning liquid pocket 3 that can be filled with cleaning liquid; and a water supply channel 10 that connects the cleaning liquid pocket to a water supply source 10. Then, using an ultrasonic oscillator, for example, a magnetostrictive vibrator 31 or a piezoelectric vibrator, which emits ultrasonic pulses to the cleaning liquid that is in contact with the felt 2 in the cleaning liquid pocket 3, the frequency is from several tens of kllz to several hundreds of kfiz. , preferably ultrasonic cleaning that emits a frequency of around 20K112.

In this case, a detector 4 is placed close to the traveling felt 2 and is capable of detecting lI'3 displacement of the felt 2, and the detector 4 is attached and moves on a rail in a direction transverse to the felt 2. It is preferable to use a dirt detection mechanism including a trolley 5 for reciprocating the trolley 5 and a drive motor 6 of a drive device for reciprocating the trolley 5. 31 is connected to the power supply 33 of the coil 32, and activated with the ON-OFF switch 34.
An electric circuit for controlling the motor drive operation based on a signal from a detector 4 that detects dirt on the felt 2 includes, for example, a data processing section 12 that performs arithmetic processing on data detected by the detector 4, and controls each drive operation. This is the cleaning equipment installed in the department.

The detector 4 is moved in a direction perpendicular to the direction of movement of the felt 2, and is used to stop or restart the operation of the driving chino or to start, move, or stop the ultrasonic oscillator by detecting dirt. It is also configured to control the operation of an electric valve 11 that cuts off and on the water supply from the water supply source IO, and uses an area or line sensor consisting of a light emitting element and a light receiving element that constitute an image sensor to input fixed data and set technical data. It is connected to the computer unit of the processing section 12 .

In addition, in the ultrasonic oscillator equipped with a vibrator that generates ultrasonic waves, as shown in the example in FIG. The electric valve 1 of the water supply line connected to the water supply f110 is equipped with a flexible pressure receiving member 38 that faces the cleaning nozzle 31 and elastically supports the other surface of the felt 2.
It is convenient to automatically fill the cleaning liquid pocket 3 with the cleaning liquid by opening and closing the cleaning liquid pocket 3. This cleaning nozzle 3. As shown in FIG. 4, the vibrator 31 is mounted on the felt 2-hi by a motor 36 so as to be able to reciprocate horizontally on a bar 35 supported by a support 37 so as to be able to move slightly up and down. Make it possible to move.

Further, in FIG. 3, the flexible pressure receiving member 3□ elastically receives the periphery of the cleaning liquid pocket when the felt is pressed by the cleaning nozzle, and an elastic shoe that substantially seals the inside of the cleaning liquid pocket 3; For example, a member made of ultra-high molecular weight polyethylene resin is used to properly retain the cleaning liquid, but as shown in the example in Fig. It is also good to deploy. Further, as the vibrator 31, a halium titanate ceramic vibrator, a crystal vibrator, a ferrite vibrator, a nickel vibrator, or an Alfero vibrator is selected and used, and is configured in a form that makes it easy to emit ultrasonic waves into the cleaning water. .

In the figure, 9 is a dehydrator, 15 and 16 are rollers, 17 is a press roll, and 18 is a data setting section, which is provided in the data processing section 12. 19 is a display section, 20 is an amplifier, 21 is a memory, 22 is a human output port, 23 is a synchronization circuit, 24 is an image circuit, 25 is an operation panel, 26 is a code carrier, and 27 is a frame.

As shown in FIGS. 6 and 7, the dirt detection mechanism includes a drive chino 7 in which the trolley 5 is slidably fitted onto the rail 13 and mounted on a variable speed motor capable of fast forwarding and fast reversing. , the front variable speed motor is configured to be reversely operated by a detection switch 14 such as a proximity switch or a rimming switch near both ends of the felt 2 in the middle direction,
It can be operated in combination with fast feed, running or synchronous speed running. The dirt detector 4 is detachably attached to the trolley 5 so that it can be easily replaced, and it can be set in any direction to match the cleaning surface moving in any direction. The dirt detectors 4 may be installed on separate trolleys and moved under control, or the cleaning nozzles 3. The roller 15 that presses the felt 2 may be moved by an elevating mechanism, and the elevating drive section may be controlled to start and stop so that the roller 15 runs past the felt 2 while in contact only during cleaning. , a vibrator 31 including a cleaning nozzle 3 can be attached to the trolley 5 together with the detector 4.

Further, the connecting cord 8 is held with a constant force by an appropriate tension mechanism, for example, the cord carrier 26, and is connected via a joint if necessary, so that there are no moving parts outside. The moving speed of the vibrator 31 including the cleaning nozzle 31 can also be set in advance depending on the length (circumference) of the cleaning surface and the intended use.

〔Effect of the invention〕

The present invention provides a cleaning nozzle having a cleaning liquid pocket that is partially pressed against felt or the like and can be filled with cleaning liquid, a water supply channel that connects the cleaning liquid pocket to a water supply source, and a cleaning liquid pocket that contacts the felt or the like in the cleaning liquid pocket. By controlling the ultrasonic oscillation operation, it is equipped with an ultrasonic oscillator that emits ultrasonic waves to the cleaning liquid being washed, and by controlling the ultrasonic oscillation operation, it can intensively clean and remove localized dirt, severe dirt, and sticky dirt that is difficult to remove. Moreover, instead of applying ultrasonic energy to the entire cleaning width, it uses concentrated energy in one area to effectively remove dirt with a small amount of power.The cleaning surface can be cleaned for any amount of time depending on the degree of dirt. In other words, it is possible to automatically detect localized dirt and perform intensive cleaning, which increases the cleaning effect, and also eliminates the need for an operator or supervisor to be stationed at all times, making it possible to perform accurate cleaning operations. At the same time, there is no wastage of washing water, and water supply equipment and operating costs can be significantly reduced, making it possible to improve the safety and quality control of paper manufacturing operations, shorten work time, eliminate unnecessary operations, and improve reliability. In addition to greatly increasing the quality and ease of maintenance and security, this method also allows for transportation without having to replace felts or the like or deteriorating the quality of the paper, thereby reducing costs.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway side view of the cleaning device in use, FIG. FIG. 5 is a longitudinal sectional view of another embodiment of the cleaning device, FIG. 6 is a partial perspective view of the dirt detection mechanism in use, and FIG. 7 is a block diagram thereof. . l...Paper sheet, 2...Felt, 3...
Cleaning liquid pocket, 31... Cleaning nozzle, 3z... Flexible pressure receiving member, 4... Dirt detector, 5... Trolley, 6... Drive motor, 7... Drive chino, 8...・・・
Connection cord, 9... Dehydrator, 10... Water supply source, 1
1... Electric valve, 12... Data processing section, 13...
Rail, 14...Detection switch, 15.16...Roller, 31...Vibrator, 32...Coil, 33...
・Power supply, 35... Bar, 36... Motor, 37...
・Support part. Patent applicant Aikawa Iron Works Co., Ltd.

Claims (5)

[Claims] (1) A dirt cleaning device disposed close to a felt, etc. that runs in contact with a paper sheet, and a drive device to which the cleaning device is attached and for reciprocating the felt in a transverse direction. A felt cleaning device for papermaking, comprising: a cleaning nozzle having a cleaning liquid pocket that is partially pressed against the felt and capable of being filled with cleaning liquid; a water supply channel connecting the cleaning liquid pocket to a water supply source; A cleaning device for papermaking felt, etc., comprising an ultrasonic oscillator that emits ultrasonic waves to a cleaning liquid that is in contact with the felt, and an electric circuit that controls the ultrasonic oscillation operation. (2) A dirt detector placed close to the running felt, a trolley to which the dirt detector is attached and moves on a rail in a direction across the felt, and a trolley for reciprocating the trolley. 1. A felt cleaning device for papermaking, comprising a dirt detection mechanism including a drive device, and configured to stop and restart operation of an ultrasonic oscillator when dirt is detected by the detector. (3) Claim 2, wherein the detector is an area or line sensor comprising a light emitting element and a light receiving element constituting an image sensor, and is connected to a computer unit of a data processing section capable of inputting and setting fixed data. The cleaning device described. (4) In an ultrasonic oscillator equipped with a vibrator that generates ultrasonic waves, a cleaning liquid pocket is provided on the surface that presses against the felt at the tip of the vibrator to form a cleaning nozzle, and the other surface of the felt is made of elastic material facing the cleaning nozzle. A papermaking felt cleaning device equipped with a flexible pressure-receiving member that provides support. (5) The flexible pressure receiving member is an elastic shoe or a rotating elastic roll that elastically receives the periphery of the cleaning liquid pocket and substantially seals the inside of the pocket when the felt is pressed by a cleaning nozzle. 4. The cleaning device according to 4.