JPS62171857A - Frame change detector for paper machine - Google Patents

Abstract

PURPOSE:To make detection accuracy so as to be improved with an inexpensive structure, by calculating a swelling form of paper as a slack quantity after integrating a difference between peripheral speed of a reel roll and decelerating speed of a paper roll, and judging on whether it is reached to an optimum apex position or not. CONSTITUTION:The value of a diametral detector 32 for a paper roll 15 is inputted into a computing element 42 with a decompression signal 33 out of a pressure device 13 via a memory circuit 41, and a GD<2> value inclusive of a spool 12 is calculated. On the other hand, the value of a speed detector 31 for a reel roll 10 is calculated together with a revolving speed of the paper roll 15 just before decompression by a computing element 48, and further a factor (k) is calculated by a computing element 50, thus a slack quantity DELTAl of paper is found by a computing element 51. This value comes to height H' at a computing element 54, and is compared with the setting value H by a comparator 55, and when it comes to H'>H, a contact 35 of a relay 56 is closed and outputted to the outside as output of a frame change detector 30. Thus, swelling height of the paper is calculable speedily and accurately without installing a photoelectric detector and an industrial television, so that wrong operations are reducible.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is capable of determining the bulge height of paper without directly detecting the bulge shape of the paper when changing the frame in the winding section of a paper machine. difference,
The present invention relates to a frame change detection device for a paper machine that detects a value as a value.

(Prior Art) The conventional technology will be explained using FIGS. 4 to 7. In FIG. 4, the winding section (hereinafter referred to as the reel section) of the paper machine includes a reel roll 10 and an electric motor 11 that drives the reel roll 10. It is composed of a spool 12 and a pressurizing device 13 that pressurizes the spool 12. A reel roll 10 is driven by an electric motor 11, and the paper 14, which is a strip material, is wound around a spool 12 by the surface drive of the reel roll 10, and becomes thicker. The paper roll 15 wound around the spool 12 is constantly pressed against the reel roll 10 by a pressure device 13.

Next, an operation called a frame change operation will be explained.

The frame change operation is when the paper roll 15 becomes thicker and is switched to a new spool to continue winding.

As shown in Figure 5, the new spool 20 is attached to the reel roll 10.
The reel roll 10 and the new spool 20 are rotated at approximately the same speed. At this time, the pressurizing device 13
is in a pressurizing operation, and the paper roll 15 continues to be wound up.

Next, as shown in FIG. 6, the pressure in the pressurizing device 3 is reduced and at the same time the high-pressure blowing device 21 is operated, and the blown air blows the paper upward through the gap between the reel roll 10 and the paper roll 15. It blows up.

Then, as shown in FIG. 6, the paper roll 15 is separated from the reel roll IO, which is the driving source, so the rotation speed gradually decreases, but the paper 14 sandwiched between the reel roll 10 and the new spool 20 is The paper is fed out at the same speed, and the difference between the feeding speed and the circumferential speed of the paper roll 15 gradually increases, and the paper between the new spool 20 and the paper roll 15 is
The blowing device 21 gradually inflates upward.

At this time, the operator monitors the shape of the swollen paper, and when the optimal shape is achieved, the swollen paper is transferred to a new spool 20 by adjusting the amount of blowing from the blowing device 21, as shown in FIG. Tilt it upward so that it gets caught between the new spool 20 and reel roll 1.0.

At this moment, the paper that was about to be rolled up on paper roll 15 was
A pulling force is applied, the spool 20 breaks, and a new spool 20 is created.
paper is wrapped around.

In order to successfully change the frame as described above, it is necessary to optimize the shape of the blown up paper (inflated paper). This required a technique for winding the wire onto a new spool, and the operation relied on the operator's five senses.

If this frame change fails, the paper on the reel will be sent out in vain because the paper machine is in continuous operation, resulting in a huge amount of paper waste, which will affect operational efficiency.

(Problems to be Solved by the Invention) In view of the above, the present invention aims to prevent paper from swollen to a predetermined size when changing the frame, in order to prevent failures in changing the frame due to individual differences among operators. The purpose is to detect the calculation and use it as an instruction to an operator or a timing signal for automatic frame change.

It is physically difficult to directly detect the bulging state of paper using a photoelectric detector, etc., and it is particularly desirable to provide a detection device that is inexpensive compared to expensive equipment such as ITV and image pattern recognition. ing.

[Structure of the invention]

(Means for solving problems) In the present invention, the bulge shape of the paper is determined by the circumferential speed V of the reel roll.

(m/win) and paper roll deceleration speed V1 (m/m1
n) and calculates the amount of slack between the new spool and paper roll ΔL (m), calculates the apex of the paper that swells from the 0 dimension of the machine layout shape, that is, the top of the paper that is slack upward, and The principle structure is such that it is determined whether the optimal apex position has been reached.

In Figure 2, the horizontal axis is time (t), and the support axis is speed (m/m).
resistance n). Vo (m/m1n) in FIG. 2 is the surface speed of the reel roll 10 and the speed of the jammed paper 14,
Time t. is the point at which the pressure device 13 is depressurized and the paper roll 15 becomes a free roll, and also the time. Garano■□(m/
m1n) is the speed at which the paper roll 15 is wound.

In FIG. 2, the shaded area is the difference between the speed at which the paper is sent out by the reel roll 10 and the speed at which the paper is wound up by the paper roll 15, that is, the amount of slack, and the amount of slack ΔL(m) is expressed by the following formula.

ΔL= f V, dt − f Vldt
- (Formula 1) However, t is t. Also, the spool 12's spool GO'' is changed to GDS2 (kg-
stomach).

The paper portion GD2 of the paper roll 15 is GDp'' (kg-po) 1 hour later. The diameter of the paper roll 15 is φ (round) 2 The load torque of the paper roll 15 is Tm (kg-m) at time t. If the rotational speed of the paper roll 15 is N. (rpm) and the speed of the paper roll 15 after p time is Vl (m/m1n), then ■, = vO-a t (m/m1n) ( 0≦t
≦k) From α=Hasagi, V1=V, (1--!-t) E...(2 formula) % formula % Speed V of reel roll 10. Assuming that (m/m1n) does not change, ΔL(m) is I from (Equation 1) and (Equation 2).
V.

ΔL=gX, Xt (0≦t≦k) (Equation 3).

Next, in Fig. 3, the radius of the reel roll 10 is r (m)
Then, the paper bulge height H' (m) can be approximated as follows.

u'=-! i measurement (m) In other words, the height of the paper's bulge by calculation is l(' (m).

It is sufficient to compare whether it matches the paper bulge height setting value H (m).

(effect) FIG. 1 shows the configuration of the present invention.

In FIG. 1, the frame change detection device 30 has a reel roll 1.
Speed detector 31 attached to electric motor j1 that drives
signal V. (m/m1n), a signal φ(m) from the diameter detector 32 that detects the diameter of the paper roll 15 in conjunction with the movement of the spool 12, and pressurizes the paper roll 15 to the reel roll 10 via the spool I2. The depressurization signal 33 from the pressurizing device 13 and the signal H(m) from the height setting device 34 for setting the swelling height of the paper are input, and calculations are performed inside the frame change detection device 3°. '=1 (When reaching 1, a signal to the outside is outputted via the relay output contact 35.

(Example) Next, the configuration of a frame change detection device 30 which is an example of the present invention will be described.

41 and 47 are memory circuits, and when the pressure reduction signal 33 is issued by the pressure reduction signal 33 from the pressure application device 13, the input to each memory circuit 41 and 47 is cut off, and the pressure reduction device 13 is operated to reduce the pressure. The values input into the memory circuits 4], 47 until just before are stored.

The arithmetic unit 42 constantly uses the values in the memory circuit 41, the spool shift setter 432, the paper density setter 442, the paper width setter 45. and each value of the setting device 46 is input, calculations are performed, and outputs are performed.

The computing unit 48 constantly computes the values in the memory circuits 47 and 41,
It is outputting.

The arithmetic unit 50 constantly calculates and outputs the output value of the arithmetic unit 50 and the value of the memory circuit 47.

The arithmetic unit 51 inputs the value of the memory circuit 47, the output value of the arithmetic unit 5o, and the value of the time generator 52, and continuously performs calculations.
However, the signal of the time generator 52 is output from the pressurizing device 1.
When the pressure reduction signal 33 of No. 3 is issued, it becomes conductive and is connected to the arithmetic unit 51.

In other words, although the calculator 51 is constantly performing calculations, the signal from the time generator 52 is not inputted before the pressure reduction signal 33 is issued, and the calculations are performed on the assumption that 1=0.

The arithmetic unit 54 constantly inputs the output value of the arithmetic unit 51 and the value of the constant setter 53, performs calculations, and outputs the values.

The comparator 55 constantly compares the output value of the calculator 54 and the setting value of the paper bulge height setting device 34.
When the output value 2 reaches the setting value of the paper bulge height setting device 34, the relay 56 is activated.

The operation contact 35 of the relay 56 is outputted to the outside as an operation output signal of the frame change detection device 30.

In FIG. 1, the value of the paper roll diameter detector 32 is:

The pressure reduction signal 33 from the pressurizing device 13 is stored in the memory circuit 41 .

The value φ(m) of the memory circuit 41 is input to the arithmetic unit 42, and the set value φs(m) of the spool diameter setting device 43, which is another calculation constant setting device, and the GD2 value for the spool 44 GDS20cg
-m')2 Set value p of paper density setting device 44 (kg/
rri') r Calculate the GD2 value of the paper roll 15 including the spool 12 together with the setting value of the paper width setter 45.

GD” = spool GD “10 paper roll GD2”
GDs”+ GDp2 = GD, +, xπ×ρxBφ4−φg4) Noodles−
B] On the other hand, the value of the speed detector 31 of the reel roll 10 is stored in the memory circuit 47 based on the depressurization signal 33 of the pressurizing device 13.

The value V of the memory circuit 47. (m/m1n) is input to the calculator 48 together with the value φ(m) in the memory circuit 41, and is the rotational speed N of the paper roll 15 immediately before the pressurizing device 13 is depressurized. (r
pm) is calculated.

No ” ”-(rpm) π×φ Output GD2 (kg-bo) of the arithmetic unit 42 and output N of the arithmetic unit 48. (rpm) is the load torque TM (k
g m) along with the value of the mechanical loss setting device 49, the calculation unit 5
o and calculate the coefficient k.

Reel roll speed V which is the output of the memory circuit 47. (m/
m1n) and the constant that is the output of the calculator 50.
1 is input.

The value t (+++in) of the time generator 52 is also input to the calculator 51 based on the depressurization signal 33 of the pressurizing device 13.
Calculate the amount of paper slack ΔL (m).

ΔL=1×辅xt(m) 2 The output ΔL(m) of this calculator 51 is the reel roll 15
This signal is input to a calculator 54 along with a signal from a constant setter 53 for setting the radius of the paper, and the bulge height H' (m) of the paper is calculated.

The output H' (m) of the calculator 54 is inputted to the set value H (m) of the paper bulge height setting device 34 and the comparator 55, and H'
Compare =H, H' =H or H')I (when you yell,
Activate relay 56. The operating contact 35 of the relay 56 is output to the outside as an output of the frame change detection device 30.

As external input elements, the winding speed can be adjusted by inputting the speed of the reel roll, the diameter of the paper roll, the depressurization signal of the pressurizing device, and the paper swelling height setting value for comparing the calculation results. Even if the diameters of the nine paper rolls differ, calculations can be detected without any problems.

〔Effect of the invention〕

It is possible to add additional equipment without making major changes to existing equipment, and the calculation accuracy can be dramatically improved by using particularly inexpensive microcomputers, and direct detection equipment such as photoelectric detectors can be installed. This means that the photoelectric detector may be damaged in physically difficult locations, such as when paper breaks, depending on the mounting position of the photoelectric detector, and in image processing technology such as ITV, the processing speed may be affected. Even if it is too slow to withstand use, it is the cheapest and can improve accuracy.
This has the effect of reducing operational errors due to individual differences among operators.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a frame change detection device showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the bulge of paper when changing the reel frame,
Figure 3 is an explanatory diagram of the height of paper expansion when changing the reel frame.
4 to 7 are explanatory diagrams of a series of operations during conventional reel frame changing. 30... Frame change detection device, 31... Speed detector 3
2...Diameter detector, 33...Reduced pressure signal contact 3
4...Height setting device, 43...Post-spool setting device 44-90 Paper density setting device, 45...Paper width setting device 52...Time generator Representative Patent attorney Nori Chika Yudo Hirofumi Mitsumata ``'6-''-J3 -J'lbi4 Figure 2 Figure 3 Figure 5 Figure 6 n

Claims (1)

[Claims] In a paper machine, the setting values from the speed detector that detects the speed of the reel roll, the diameter detector that detects the diameter of the paper roll, and the height setting device that sets the height of the paper bulge when changing the frame. and the depressurization signal of the paper roll pressure device when changing the frame, and also input the spool diameter, paper density, paper width, paper roll load torque,
It is equipped with a calculator that calculates the value of the reel roll diameter, and a comparator that detects whether the bulge height of the paper matches the calculated value output from the height setting device and the calculator. A paper machine frame change detection device.