JPH01260087A - Washing apparatus for paper-making canvas or such - Google Patents

Abstract

PURPOSE:To improve the washing efficiency of canvas, by attaching a water- feeding nozzle and a canvas stain detector to a trolley traversing in the direction of the width of a paper-making canvas and controlling the traverse of the trolley and the supply of water according to the signal transmitted from the detector. CONSTITUTION:A trolley 5 traversing along the direction of width of a paper- making canvas 22 is placed above the canvas to wash the paper-making canvas (including drier canvas, press felt, paper-making wire and various other belt conveyors). The trolley 5 is provided with a water-feeding nozzle 3 and a stain detector 4 for the canvas. The signal transmitted from the detector 4 controls the traverse and halt of the trolley 5 and the supply and stop of the water to the water-feeding nozzle 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a method for intensively cleaning and removing dirt from dryer canvas, press felt running mats, wires, belt conveyors, running rolls, etc. used in paper manufacturing. The present invention relates to a cleaning device for cleaning.

[Conventional technology]

In general, foreign substances such as fibers, fats and oils including resin, hard substances such as sand, metal powder, and soil that adhere to the canvas and press felt wire used to transport paper sheets in paper machines, etc. , stains transferred to the paper sheet side.

It is known that these foreign substances can be removed by spraying cleaning water because they cause quality deterioration.

Conventionally, in this type of shower device, a plurality of water supply nozzles are installed in the width direction of the canvas in close proximity to the moving canvas, and the pipe is slid in the width direction to perform effective washing. A large amount of water is used, and it is necessary to operate push buttons and turn the pulp on and off each time the machine is operated, which takes a lot of time.In addition, because the machine operates intermittently, it is often impossible to eliminate areas that are particularly contaminated. The dirt in the width direction of the canvas is not constant, and there is a lot of dirt in only one part. Attempts are also being made to improve the cleaning effect by intensively cleaning, using less water, and saving work 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 preset value that matches the machine speed. Setting value conversion operations had to be performed under the supervision of personnel, which was a problem because it hindered the automation of intensive cleaning of localized dirt.

The present invention accurately eliminates these conventional drawbacks, makes it possible to improve the safety and quality control of paper manufacturing operations, shorten working time and eliminate unnecessary operations, and greatly improve reliability and maintainability. The object of the present invention is to provide a cleaning device for papermaking canvas, etc., which is easy to maintain.

[Means to solve the problem]

The present invention provides a water supply nozzle disposed close to a canvas or the like that runs in contact with a paper sheet, a trolley to which the water supply nozzle is attached and moves on a rail in a direction across the canvas, and a trolley that moves on a rail in a direction across the canvas. In the canvas cleaning device for paper manufacturing, the water supply nozzle has a connecting hose and is connected to a water supply source for cleaning water containing pulp, and also detects dirt on the canvas. A cleaning device for papermaking canvas, etc., characterized in that a detector is provided on the trolley, and an electric circuit is provided for controlling the pump or pulp opening/closing operation of the water supply source and the motor drive operation using signals from the detector. be.

[For production]

In this cleaning device, a water supply nozzle 3 is installed close to a canvas 2 on which a paper sheet 1 is placed and transported to the next process.
and the dirt detector 4 are reciprocated in the width direction of the canvas 2 by a drive device 7 via a trolley 5. When the detector 4 detects dirt on the canvas 2 during this running, the data processing section 12 to which fixed data has been inputted as set values compares and processes the water supply pulp 9 and the water supply nozzle 3. By controlling the drive motor 6, the water supply and the water supply nozzle position can be determined, and only the arbitrary position and width of the cleaning surface can be washed for an arbitrary time, and when the set time of washing is completed, the continuous washing movement is automatically started. Efficient operation is possible without switching, and quality control of paper sheets can be made much easier and better.

(Example) Regarding an example in which the present invention is applied to a dryer canvas,
To explain with reference to FIGS. 1 to 4, there is a water supply nozzle 3 placed close to the canvas 2 on which the paper sheet 1 is placed and transported to the next process, and a detector 4 capable of detecting dirt on the canvas 2. is mounted on a trolley 5 that moves on a rail in a direction transverse to the canvas 2, and the trolley 5 is connected to a drive device, such as a chain, mounted on a drive motor 6, for example a variable speed motor or a motor with an added speed reduction mechanism. The water supply nozzle 3 is connected to a water supply source 10 for washing water with a pulp 9 through a connecting hose 8, and also connects to a water supply source 10 for cleaning water with a pulp 9, An electric circuit 1) that controls pump or pulp operation and motor drive operation of the water supply source 10 based on a signal from a detector 4 that detects dirt; , and a cleaning device connected to each drive operation section.

The detector 4 is arranged in parallel at a position upstream of the water supply nozzle 3 in the moving direction of the canvas 2 and is moved together with the water supply nozzle, and is capable of stopping and restarting the operation of the drive chain by detecting dirt. An area or line sensor consisting of a light emitting element and a light receiving element constituting an image sensor is used, and is connected to a computer unit of a data processing section 12 that can input and set fixed data.

The trolley 5 is slidably fitted onto the rail 13 and connected to a drive chain 7 mounted on a variable speed motor capable of fast forwarding and fast reversing, and is close to both ends of the canvas 2 in the width direction. The front variable speed motor is configured to be reversed by a detection switch 14 such as a switch or a limit switch, and when the water supply nozzle 3 reaches the edge of the canvas 2, it is reversed and returned to the starting point position (at this time, it is not possible to return quickly). (possible) can now operate at synchronous speed again.

In the figure, 15 is a water pan, 16 is a roller, 17 is a dryer drum, 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 hose carrier, and 27 is a frame.

The water supply nozzle 3 and dirt detector 4 are detachably installed on the trolley 5 so that they can be easily replaced. Although the water supply nozzle 3 and the detector 4 can be set on separate trolleys, the water supply nozzle 3 and the detector 4 may be moved under control.

Further, the connection hose 8 is held with a constant force by an appropriate tension mechanism, for example, a hose carrier 26, and is connected via a joint if necessary, so that there are no moving parts outside, and the trolley 5 The moving speed of can also be set in advance depending on the length (circumference) of the cleaning surface and the intended use.

〔Effect of the invention〕

In the present invention, the water supply nozzle provided on the trolley is connected to a water supply source for washing water with pulp through a connecting hose, and the trolley is provided with a detector for detecting dirt on the canvas, and furthermore, the water supply nozzle of the water supply source is connected to a water supply source for washing water with pulp. Alternatively, by installing an electric circuit that controls the pulp opening/closing operation and the motor drive operation using the signals from the detector, it is possible to clean only an arbitrary position and width of the cleaning surface for an arbitrary time, that is, to automatically remove local dirt. Water supply equipment that can detect and perform intensive cleaning, improves the cleaning effect, eliminates the need for operators or monitors to be stationed, enables accurate cleaning operation, and eliminates wasted cleaning water. It greatly reduces operating costs and improves the safety and quality control of paper manufacturing operations, reduces work time and eliminates unnecessary operations, greatly increases reliability, and facilitates maintenance and security. In addition, it is possible to transport the canvas without having to change the canvas or deteriorating the quality of the paper.
It is also possible to reduce 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 device in use, FIG. 2 is an explanatory diagram of the system, FIG. 3 is a partial perspective view, and FIG. 4 is a block diagram. . 1...paper sheet, 2...canvas, 3...
・Water supply nozzle, 4... Dirt detector, 5... Trolley, 6... Drive motor, 7... Drive chain, 8...
Connection hose, 9...Pulp, 10...Water supply source, 1
)... Electric circuit, 12... Data processing section, 13...
-Rail, 14...detection switch, 15...water pan, 16...roller, 17...dryer drum.

Claims (4)

[Claims] (1) A water supply nozzle placed close to the canvas, etc. that runs in contact with a paper sheet, a trolley to which the water supply nozzle is attached and moves on a rail in a direction across the canvas, and a trolley that moves back and forth across the canvas. In the canvas cleaning device for paper manufacturing, the water supply nozzle is connected to a water supply source for washing water with pulp through a connecting hose, and a detector for detecting dirt on the canvas is provided. A cleaning device for papermaking canvas, etc., characterized in that the trolley is equipped with an electric circuit that controls the pump or pulp opening/closing operation of the water supply source and the motor drive operation using signals from the detector. (2) Claim 1, wherein the detector is arranged in parallel in the moving direction of the canvas and is moved together with the water supply nozzle, and is configured to stop and restart operation of the drive device upon detecting dirt. The cleaning device described. (3) Claim 1, 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. Or the cleaning device according to 2. (4) The trolley is slidably inserted onto the rail and connected to a drive chain mounted on a variable speed motor, and a detector such as a proximity switch is installed near both ends of the canvas in the front variable speed. 4. The cleaning device according to claim 1, 2 or 3, wherein the motor is configured to operate in reverse.