JPS6128095A - Refiner control apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention is a refiner that performs disintegration, hydration, and cutting by striking papermaking raw material liquid with opposing blade elements.
The present invention relates to a refiner control device for ``g'', and in particular to an improvement in pressure control means between the blade elements.

[Conventional technology] − Generally, papermaking raw material liquid, so-called paper stock, is beaten and disintegrated.

Refiners that perform hydration and cutting include disc-type refiners, conical-type refiners, drum-type refiners, and the like.

FIG. 3 is a diagram showing the cross-sectional structure and control system of a conventional disk-type finer. In Figure 3, 1 and 2 are the first
．． A rotary disk 3 that is a second rotary blade element and has a hole 3a
It is attached by means such as bolts to both sides of the

The center of the rotating disk 3 is fitted and fixed to one end of the shaft 4. The other end of the shaft 4 is connected to a rotating shaft 6a of a motor 6 via a joint 5. Further, the shaft 4 is rotatably and slidably supported by a bearing 7 near its central portion. Thus, the shaft 4 can be rotated by the drive of the motor 6 and can also be moved in the axial direction.

On the other hand, the first. At a position opposite to the second rotary blade element 1.2, the first rotary blade element 1. A second fixed blade element 8.9 is provided, the first fixed blade element 8.9 being attached to the inner surface of the cylindrical container 10 by means of bolts or the like. The second fixed blade element 9 is also attached to the inner surface of the inner lid 11 by means such as bolts. The cylindrical container 10 is provided with a stock inlet pipe 12 and a paper stock outlet pipe 13,
The paper stock flowing from the stock inlet pipe 12 enters the double-edged elements 1 and 8.
And after being beaten between 2 and 9, it flows out from the stock outlet pipe 13. Further, the cylindrical container 10
A member 14 is filled in the gap between the shaft 4 and the shaft 4, and is used to tighten the shaft 4. Said inner lid 1
1 is slidable in the axial direction on the inner circumferential surface of the outer lid 15, and is moved in the axial direction by the action of the pressurizing device 16.

Next, the constraint system will be explained. In the figure, 17 is a power value setter, and based on the power value set by this setter 17, an output signal S1 is sent from the calculator 18 to the pressure controller 19.
It is to be sent to. The pressure controller 19 operates the pressure device 16 based on the output signal S1 to move the inner lid 11 in the axial direction. When the inner cover 11 moves in the axial direction, the second fixed blade element 9
The pressure applied to the stock flowing between the rotary blade element 2 and the second rotary blade element 2 changes. Then, the first rotary blade element 1 and the first
The pressure applied to the stock flowing between the fixed blade element 8 and the fixed blade element 8;
The shaft 4 moves in the axial direction so that the pressures applied to the stock flowing between the second rotary blade element 2 and the second fixed blade element 9 are the same.

Changes in the gaps 1 and 8 and 2 and 9 between the double-edged elements at this time are detected as changes in the power supplied from the power source 20 to the motor 6. Therefore, the power is detected by the power detector 21 and the detection signal S2 is fed back to the arithmetic unit 18.
The power value is compared with the power value set in , and the operation of the pressurizing device 16 is feedback-controlled according to the deviation.

[Problem that the invention seeks to solve]

By the way, in general, the properties such as the hardness or amount of the stock flowing into the gaps 1 and 8 and 2 and 9 between the double-edged elements are not necessarily uniform. Therefore, in order to equalize the mechanical pressure applied to the paper stock, it is necessary to carefully adjust the gaps between the double-edged elements 1 and 8 and between 2 and 9 depending on the properties of the paper stock. For this purpose, a rotating disk 3 and an inner lid 1 are required.
1 is required to move smoothly in the axial direction. However, in the conventional refiner, the rotating disk 3 could not move smoothly due to the frictional resistance caused by the shaft tightening of the member 14 and the axial sliding frictional resistance of the bearing 7 or the joint 5.

Furthermore, the inner cover 11 could not be moved smoothly due to frictional resistance with the outer cover 15. Therefore, in the conventional refiner control device, the gap between the double-edged elements 1 and 8 is adjusted according to the properties of the stock.
Also, since the gap between 2 and 9 cannot be adjusted with high precision, the mechanical pressure applied to the stock becomes uneven, and there is a risk that consistent beating cannot be performed.

Furthermore, the properties of the paper stock may differ partially between the respective blade elements 1 and 8 or 2 and 9 as well. However,
In the conventional refiner control device, there is a
Since the gap between and 8 or 2 and 9 is controlled to be constant, for example, if unbeaten hard paper stock or a large amount of paper stock flows into the outer circumferential side between double-edged elements 1 and 8, Excessive pressure is applied to the paper stock, resulting in severe damage to the paper stock. On the other hand, if the paper stock is sufficiently beaten and soft or a small amount of paper stock flows in, the paper stock is not subjected to the beating process because not much pressure is applied to the paper stock.

As a result, the degree of beating of the paper stock is not constant, and there is a risk that the quality of the paper will deteriorate when paper is made.

Therefore, the present invention makes it possible to uniformly control the mechanical pressure applied to the paper stock even if the properties of the paper stock flowing between each blade element are different, thereby achieving constant beating and improving the quality of the paper produced. The purpose is to provide a refiner system (II).

[Means for solving problems]

The present invention is characterized by taking the following measures in order to solve the above problems and achieve the object. That is,
Based on the power value set by the power value setter, a computing unit calculates the inter-blade element pressure value, and a plurality of pressure devices divide the blade element into multiple pieces according to the above-mentioned inter-blade element pressure value. The blade elements are moved to adjust the distance between opposing blade elements. Then, the pressure between the blade elements is detected by a pressure detector, the detected pressure value is compared with the pressure value between the blade elements calculated by the calculator, and the pressurizing devices are respectively controlled according to the deviation. It is characterized by the fact that

[Effect]

By taking the above measures, the pressure between the blade elements can be made uniform because the distance between the blade elements can be changed depending on the properties of the paper stock.

(Embodiment) Fig. 1 is a diagram showing the configuration of an embodiment of the present invention, showing a cross-sectional structure and a control system.The same parts as in Fig. 3 are given the same reference numerals, and detailed explanations are omitted. The fixed blade element No. 71M2 in this embodiment is divided into two parts in the radial direction as shown in FIG.
, 9b shall be used. As shown in FIG. 1, the first fixed blade elements 8a and 8b each have a pressure detector 31a.
, 31b are attached to the inner surface of the cylindrical container 1o via pressurizing devices 32a, 32b, and the second fixed blade elements 9a, 9b are equipped with pressure detectors 3B a , 31b, respectively.
Pressure device 34a with 33b.

It shall be attached to the inner surface of the lid 35 via 34b.

Thus, both fixed blade elements 8a, 8b and 9a, 9b
are movable in the axial direction by the action of the respective pressurizing devices 32a, 32b and 34a, 34b. Note that in this embodiment, the pressure devices 32a, 32b, and 34a are
, 34b uses a pressure back type device that expands and contracts by applying fluid pressure.

On the other hand, the first. The second rotary blade elements 1 and 2 are attached to both sides of the rotary disk 3 and are rotatable as in the conventional case, but are prevented from moving in the axial direction.

Further, the paper stock is supplied to the paper stock inlet pipe 1 provided in the cylindrical container 10.
2 into the container 11, and the double-edged elements 1 and 88,1
After being subjected to beating treatment in the gaps between and 8b, 2 and 9a, and 2 and 9b, it flows out from the stock outlet pipe 13. Note that the paper stock inlet pipe 12 is shown in Figure 1, Application No. 12a.
It may be provided on the lid 35 side as shown in FIG.

As a control system, an output signal S corresponding to a power value V set by a power value setting device 17 and a pressure value between blade elements calculated and set by a calculation unit 18 based on this power value V is outputted. It is supplied to pressurization controllers 19a, 19b, 19C, and 19d. Each of the pressurization controllers 19a to 19d controls the respective pressurization devices 32a and 32 in accordance with the output signal S.
b, 34a, and 34b to operate the fixed blade element 8.
a, 8b, 9a, and 9b are moved in the axial direction to change the gaps between the double-edged elements 1 and 8a, 1 and 8b, U2, 98.2, and 9b. The change in the gap at this time is detected by the pressure sensor 31a.

Inter-element pressure P detected by 31b, 33a, 33b
1 and the electric power W of the motor 6 detected by the electric power detector 21. Each of the above detectors 21.31a, 31b
, 33a, 33b are fed to the arithmetic unit 18, and in the arithmetic unit 18,
The pressurizing devices 32a, 32b, 3 are adjusted so that the power W becomes the power set value V and the pressure Pi becomes the pressure set value.
4a and 34b. That is,
The pressure between each blade element is controlled to be uniform under constant electric power. At this time, between W and Pt, W=ko +ΣII P+ (11Pi = mIP
O''・(2) Therefore, based on the above equation (1+,
), in equation (2), Pi, kn, ki.

ml is a constant and ranges from 1-1 to n (n is the number of pressurizing devices).

In this apparatus configured in this way, the operation of each pressurizing device 32a, 32b, 34a, and 34b is controlled according to the properties of the paper stock, and the operation between each blade element 1 and 88, 1 and 8b, or 2 is controlled. Since the gaps between 9a, 2 and 9b are arbitrarily changed, the mechanical pressure applied to the stock flowing between the blade elements is all uniform. Therefore, the degree of beating of the paper stock is constant, and the quality of the paper is improved when paper is made.

Furthermore, since the pressure distribution between each blade element can be arbitrarily changed, it is also possible to cut the paper stock on the inner circumferential side between the blade elements to make the length uniform, and then beat it on the outer circumferential side. Therefore, a single refiner can process stocks that meet a wide range of requirements.

Furthermore, the gaps between each blade element are fixed blade elements 8a and 8b.

9a, 9b are pressure devices 32a, 32b, 34a.

34b, the pressure between the blade elements can be finely adjusted with high precision, without the negative effects of frictional resistance of the rotary disk 3 or the inner cover 11 as in the conventional case. Furthermore, less energy is required to obtain the same paper quality as in the past, resulting in lower costs.

Note that the present invention is not limited to the above embodiments. For example, in the above embodiment, the fixed blade element is divided into a plurality of pieces, each of which is provided with a pressurizing device, and the fixed blade element is moved in the axial direction. The pressure device may also be moved in the axial direction. Further, in the above embodiment, the pressurizing devices 32a, 32b, 3
4a.

Although a pressure bank type device that expands and contracts by applying fluid pressure is used as 3.46, other devices such as a hydraulic cylinder, jack, etc. may be used. Further, in the above embodiment, an example was shown in which the present invention was applied to a disc-type refiner, but it is of course applicable to other refiners such as a conical-type refiner and a drum-type refiner. In addition, various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the present invention, the pressure value between the blade elements is calculated by the calculator based on the power value set by the power value setting device, and the pressure value between the blade elements is calculated by the plurality of pressure devices according to the pressure value between the blade elements. The divided blade elements are moved to adjust the distance between the opposing blade elements, the pressure between the blade elements is detected by a pressure detector, and the detected pressure value is combined with the pressure value between the blade elements calculated by the calculator. Compare that. Since the pressure devices are controlled according to the deviation of It is possible to provide a refiner machine that can perform beating and improve the quality of paper produced.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing the configuration of an embodiment of the present invention. Figure 1 is a diagram showing a cross-sectional structure and a control system, and Figure 2 is a diagram showing an example of division of a blade element and a control system. be. FIG. 3 is a diagram showing the cross-sectional structure and control system of a conventional disc-type finer. 1.2... 1st. 2nd rotary blade element, 3... rotating disk, 4... shaft, 6... motor, 8a, 8b... first fixed blade element, 9a, 9b... second fixing blade element,
10... Cylindrical container, 17... Power value setting device, 18
... Arithmetic unit, 19a to 19d... Pressure controller, 21
...power detector, 31 a, 31 b, 33 a, 33
b...Pressure detector, 32a, 32b, 34a, 34'
o-...pressure device, 35...lid.

Claims (1)

[Claims] The papermaking raw material liquid is struck by opposing blade elements to disintegrate, hydrate,
In a refiner control device for controlling a refiner that performs cutting processing, there is a power value setter that sets a power value, and a calculation that calculates a pressure value between blade elements based on the power value set by the power value setter. a pressurizing device that moves the blade element according to the pressure value between the blade elements calculated by the calculator and adjusts the pressure between the opposing blade elements, and a pressure between the blade elements adjusted by the pressurizing device. a pressure detector that detects the pressure, and a control means that compares the pressure value detected by the pressure detector with the inter-blade element pressure value computed by the computing unit, and performs feedback control of the pressurizing device according to the deviation thereof. A refiner control device comprising: at least one of the opposing blade elements is divided into a plurality of parts, each of which is provided with the pressure device.