JPH0255556B2 - - Google Patents

Description

[Detailed Description of the Invention] The paper stock liquid that is sent via piping to the head box of a paper machine is usually 3 to 9 m in width and 10 to 10 m in thickness.
The 30 mm slicing jet is part of the following dewatering equipment and is either on a single wire running horizontally at approximately the same speed as the slicing jet, or between two running wires, or rotating. It is ejected between the roll and the wire.

Changing the position and angle of this slice jet when it lands on the dehydration equipment will greatly change the unevenness of brightness and darkness (formation) when seen through the paper, which will affect the product value, so great care must be taken in operation. It is being said. Additionally, newsprint machines are often operated at a constant speed, but it is not uncommon for high-quality paper machines to make paper by changing the type and thickness of paper several times a day; are also different.

By the way, since the slice jet is affected by gravity, the position at which it lands on the dehydration equipment changes depending on the speed of the jet unless the direction of travel of the jet is directly above or below. Therefore, it is necessary to adjust the landing point of the slice jet every time the machine speed changes.

Conventionally, the method of adjusting this landing point is to sharply constrict the flow between the slice lip and the partner lip near the spout of the slice lip, and to give direction to the flow by adjusting the relative position in the flow direction with the partner lip. A method of adjusting the landing point by changing the direction of the slice jet. How to change the position of the dehydration equipment and adjust its relative relationship with the jet. There was a method to adjust the landing point by changing the posture of the head box.

However, this method has the drawback that the jet jet angle changes depending on the opening degree of the slice lip, and the angle also changes even if the lip opening degree is changed in the width direction. There were many drawbacks that limited its application. Another method is
The landing point was adjusted by tilting the entire headbox, but this had the disadvantage that the position of the spout of the headbox also moved, which changed the angle at which the slice jet landed on the dewatering equipment.

High-concentration papermaking can save energy and resources, but the thickness of the slice jet becomes thinner as the concentration of the raw material liquid increases. For this reason, it is highly required that the slice jet be ejected without disturbing the flow so as not to disturb the surface of the slice jet, and that it must land on the dewatering equipment quietly and uniformly in the width direction. However, the conventional methods have not been fully satisfactory.

The present invention has been proposed to solve the above-mentioned conventional drawbacks, and includes connecting one end of a plurality of links lined up in the width direction at any location of the head box, and connecting one end of a plurality of links lined up in the width direction at any other location. A line of intersection between a plane including the former plurality of links and a plane including the latter plurality of links connects one end of the plurality of links of the head box to the spout of the slice jet extending in the width direction of the head box. The other end of the former link and the other end of the latter link are rotatably fixed so that they intersect near the plane connecting the points, and one end rotates at the connection point between either the former or the latter link and the head box. By providing length-adjustable links that are connected together and rotatably fixed at the other end, the head box main body can be rotated about the intersection line and fixed at any position. In order to easily adjust the landing point and landing angle of the slice jet ejected from the jet nozzle of the head box, the head box is rotated around the jet nozzle of the head box or its vicinity, and at this time, the head box is made to rotate in the width direction. Instead of supporting the head box with pins from both ends on the extension of the spout of the head box and rotating it, a plurality of links arranged in the width direction are provided at arbitrary points on the head box, and other links are placed at other arbitrary points in the width direction. A plurality of other links are provided in line with the headbox, and the attitude of the headbox is adjusted so that the intersection line of the plane containing the former link and the plane containing the latter link intersect near the spout of the headbox. It is an object of the present invention to provide a posture adjustment device for a paper machine headbox.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a head box attitude adjustment device showing an embodiment of the present invention, in which a plurality of links 2 arranged in the width direction are installed at arbitrary locations on a head box 1. One end is connected with a pin 4, and one end of a plurality of links 3 lined up in the width direction is connected with a pin 5 at another arbitrary location, and a plane including the same plurality of links 2 and a plane including a plurality of links 3. The positions of the pins 7 and 8 at the other ends of the links 2 and 3 are determined and rotatably fixed so that the lines of intersection of the planes intersect at the spout 6 of the head box 1. Note that the position of the spout 6 is arbitrarily determined.

Further, since the headbox 1 cannot be fixed with just the links 2 and 3, a link 9 whose length can be adjusted is provided at an arbitrary position of the headbox. That is, to explain how the headbox can be fixed using three links, in FIG. can take any position on the arc whose radius is the length of each link, and the position of the headbox is not fixed. However, if the length of the link 9 is determined by providing the link 9 and aligning its one end with the fulcrum on the head box of one of the two links (in the case of Fig. 1, the fulcrum 5), then the fulcrum 5 is fixed at one point. On the other hand, the fulcrum of the other link 4
is the intersection of a circular arc whose radius is the length of the link 2 centered on the other end 7 and an arc whose radius is the distance between the fulcrums 5 and 4 centered on the fulcrum 5 whose position has already been determined. determined. In FIG. 1, one end of the link 9 is connected to the head box body using the pin 5, and the other end is rotatably fixed with the pin 10. Reference numeral 15 denotes a slice jet, and the point at which the jet 15 lands on the roll 11 is designated as 12, and the point at which the traveling wire 13 begins to contact the roll 11 is designated as 14.

Next, the operation of the embodiment shown in FIG. 1 will be explained.
Now, when the machine speed changes, the point 12 at which the slice jet 15 lands on the circumference of the roll 11 changes, so it is necessary to keep the landing point 12 constant. Therefore, the length of the link 9 is adjusted and the head box 1 is rotated about the spout 6, so that the landing point 12 of the slice jet becomes constant.

At this time, the position of the spout 6 of the slice jet remains unchanged, and the position of the landing point 12 can also be fixed, so
The landing angle when the slice jet 15 lands on the circumference of the roll 11 remains constant. Note that this embodiment is particularly suitable for use in headboxes of fine medium-quality paper machines where the machine speed is often changed, and by adjusting the length of the link 9, even if the machine speed changes To easily adjust the landing point of a sliced jet while keeping the landing angle of the jet constant.

FIG. 2 shows a second embodiment of the present invention, showing a plane including a plurality of links 2 and a plane including a plurality of links 3.
This differs from FIG. 1 in that the lines of intersection of the planes including the planes intersect at the landing point 12 on the circumference of the roll 11.

Now, in FIG. 2, when the length of the link 9 is adjusted, the headbox 1 rotates around the landing point 12 that intersects the intersection line of the links, and the landing point of the slice jet remains constant, but the landing angle changes. This embodiment is particularly suitable for the headbox of a newsprint machine that is operated at a constant speed, and by adjusting the length of the link 9, the landing point of the slice jet can be kept constant. The landing angle of the slice jet can be easily adjusted.

Next, FIG. 3 shows a third embodiment of the present invention. In the figure, slide devices 17 and 18 that can continuously slide and adjust the position of the pin 7 of the link 2 and the position of the pin 8 of the link 3 are provided, and a plane including a plurality of links 2 and a plane including a plurality of links 3 are provided. A head box spout 6 whose intersection line extends in the width direction,
It should be placed on the plane connecting the slice jet landing points 12.

Now, in FIG. 3, the intersection line 16 of links 2 and 3 connects the spout 6 extending in the width direction and the landing point 12.
It can be easily set anywhere on the plane connecting the
When the length of link 9 is adjusted, the headbox rotates about intersection line 16.

Here, when the intersection line 16 is located at the jet outlet 6, the landing angle is constant and the landing point can be easily adjusted. Further, when the intersection line 16 is on the line connecting the ejection point and the landing point 12 and is closer to the ejection point, the landing point can be easily adjusted without changing the landing angle much.

Furthermore, if the intersection line 16 is on the line connecting the ejection point and the landing point 12 and is closer to the landing point 12, then the landing point 12
The landing angle can be easily adjusted without changing much, and when the intersection line 16 is at the landing point 12, the landing point is constant and the landing angle can be easily adjusted.

FIG. 4 shows a fourth embodiment of the present invention, which differs from link 2 in FIG. 1 in that the length of link 32 can be adjusted. When the length of the link 9 is adjusted here, the head box 1 rotates around the spout 6, and the landing point of the slice jet 15 changes.

Further, by adjusting the length of the link 32, the position of the jet outlet 6 of the head box can be changed, and the landing angle when the slice jet 15 lands on the roll 11 can be changed. Therefore, the landing point of the slice jet can be easily adjusted, and the landing angle can also be easily adjusted.

FIG. 5 shows a fifth embodiment of the invention. In the figure, one end of a plurality of links 20 arranged in the width direction is connected to an arbitrary part of the head box 19 with a pin 22, and one end of a plurality of links 21 arranged in the width direction is connected to another arbitrary part with a pin 23. , the pins 25 and 26 at the other ends of the links 20 and 21 are positioned so that the intersection line of the plane containing the plurality of links 20 and the plane containing the plurality of links 21 intersects at the spout 24 of the head box. Determine and fix each.

Since the headbox cannot be fixed only with links 20 and 21 which arbitrarily determine the position of the spout 24, a link 27 whose length can be adjusted is provided at an arbitrary position of the headbox.
In FIG. 5, one end of the link 27 is connected to the head box using the pin 23, and the other end is rotatably fixed by the pin 33.

Now, when the length of the link 27 is adjusted in FIG. 5, the head box 19 rotates around the spout 24. The landing point of the slice jet 28 changes depending on the machine speed, and the attitude of the head box is adjusted so that it lands near the tip 30 of the forming board 29, which is usually fixed. At this time, since the position of the jet nozzle 24 is constant and the landing point is also the same, the landing angle of the slice jet is kept constant.

In addition, by adjusting the length of the link 20, the height of the jet nozzle 24 can be changed, and the drop from the running wire 31 can be adjusted, making it easy to adjust the landing angle when landing on the tip 30 of the slice jet forming board. It can be adjusted to As described above, in this fifth embodiment, the landing point of the slice jet can be easily adjusted, and the landing angle can also be easily adjusted.

The present invention is constructed as described in detail above, and is supported by a plurality of links lined up in the width direction, so that even if the width of the headbox becomes wide, the bending of the headbox does not become a problem, and both ends of the headbox are supported. Since it is not supported on the side, the link does not get in the way when cleaning the inside of the head box.

In addition, the landing point and landing angle of the slice jet can be easily adjusted, and the optimum values of the landing point and landing angle of the slice jet can be easily found depending on the type of paper being made, raw material concentration, papermaking speed, etc. So,
Paper with good texture can be made.

On the other hand, by slightly changing the speed difference between the slicing jet and the running wire or rotating roll, the orientation of the fibers can be changed and the aspect ratio of paper strength can be increased or decreased. Since the landing conditions of the slice jet are accurate, it is possible to produce paper with a constant aspect ratio of strength.

[Brief explanation of the drawing]

1, 2, 3, 4, and 5 are side views of a paper machine headbox attitude adjustment device showing an embodiment of the present invention. Explanation of the main parts of the diagram, 1...head box,
2, 3... Link, 4, 5... Pin (one end of link),
6... Spout, 7, 8... Pin (other end of link), 9
...Link, 11...Roll, 12...Landing point, 16...
Intersection line.

Claims (1)

[Claims] 1 Connect one end of a plurality of links arranged in the width direction to an arbitrary part of the head box, and connect one end of a plurality of other links arranged in the width direction to another arbitrary part, and connect the former plurality of links to an arbitrary part of the head box. and the other end of the former link so that the intersection line of the plane containing the latter plurality of links intersects near the plane connecting the spout and landing point of the slice jet extending in the width direction of the head box. Length adjustment in which the other end of the latter link is rotatably fixed, one end is rotatably connected to the connection point between either the former or the latter link and the head box, and the other end is rotatably fixed. 1. An attitude adjustment device for a headbox of a paper machine machine, characterized in that the main body of the headbox can be rotated about the line of intersection by providing a link that can be fixed at any position.