FI86086C - REGISTERANLAEGGNING FOER INLOPPSLAODAN AV EN PAPPERSMASKIN OCH FOERFARANDE VID REGLERING AV INLOPPSLAODAN AV EN PAPPERSMASKIN. - Google Patents

Description

86086

Paper machine headbox adjustment devices and method for adjusting the head of a paper machine Regleranläggning för inloppslädan av en pappersmaskin och förfarande vid regiering av inloppslädan av en pappersmaskin 5

The invention relates to a method and a device for adjusting the headbox of a paper machine.

10 Device solutions are known from the prior art in which the lip opening of the lip cone can be adjusted by turning the lip plate with a cylinder device. Such adjustment by means of a cylinder device is implemented, for example, in the solution according to FI patent application 833645. U.S. Pat. No. 4,137,124 discloses a device solution in which the upper lip and lower lip beams are formed to be adjustable by screw devices.

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However, prior art adjustment systems have not been able to maintain the lip opening in a standard adjustment width in the best possible way, or in a web - width adjustable dimension that would be most advantageous:. in terms of web running. State-of-the-art solutions are also not best suited for high web speeds where the pulp pressures against the lip beams are very high.

The object of the invention is thus a device solution in which it is possible to ensure sufficient support for the lip beams of the lip cone, even for high web speeds, whereby the lip opening 25 also remains in its adjusted position at all web speeds. It is also an object of the invention to provide a device solution which is able to adjust the lip opening to the desired width of the web.

The invention provides a method and apparatus for headbox lower and upper lip plates; · 30 supported by support shoes. The width of the support shoes can vary with a pitch of 75-120 mm.

The support shoes bend the desired shape into the lip plate. Each shoe has its own actuator, which may be a mechanical worm gear or a hydraulic cylinder or some other suitable actuator. No separate lip opening equipment is required. The solution according to the invention is very suitable for high lip cone pressures. When the adjusting devices are placed on both lips, the lip shower can be directed more precisely than with any headbox in use.

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The method according to the invention for adjusting the lip opening of the lip cone of a paper machine headbox is mainly characterized in that the method uses side-by-side support shoes, each support shoe being acted upon by an actuator and the method each length and that in the method each support plate is articulated to pivot at the pivot point and wherein in the method the lip opening can be opened by the same actuators which act on each support shoe separately, in which case a separate lip cone opening actuator is not required.

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The paper machine headbox lip cone lip opening adjustment device according to the invention is mainly characterized in that the apparatus comprises adjacent support shoes 20 which are connected to the upper lip plate and / or the lower lip plate. each support plate rests on its plate surface over a wide area.

The invention will now be described with reference to some preferred embodiments of the invention shown in the figures of the accompanying drawings, to which, however, the invention is not intended to be exclusively limited.

Figure 1 shows a basic axonometric view of an apparatus according to the invention in which the upper lip plate is adjustable.

Figure 2 shows an adjustment apparatus in which both the upper lip plate and the lower lip plate are adjustable by a support shoe structure according to the invention.

3,86086

Figure 3 is a view from the direction of the arrow N in Figure 2.

Figure 1 illustrates the lip opening adjustment of the lip box of the headbox of a paper machine according to the invention. The solution is especially suitable for high paper machine speeds where there is high pressure in the lip cone. The lip cone K is delimited by the upper lip plate 10 and the lower lip plate 11. The lip opening A is adjusted in the embodiment of the figure by bending the upper lip plate 10 by applying force to separate support shoes 12a, 12b, 12c ... a pressure P which presses the upper lip plate 10 and the lower lip plate 11 in the directions indicated by the arrows L 1 in the figure. According to the invention, a counter-support and a counter-pressure are formed by the actuator 13a, 13b, 13c ... The actuators 13a, 13b, 13c ... each engage in their own support shoe 12a, 12b, 12c. The actuators 13 are preferably hydraulic cylinders. By means of the actuators, the support shoes 15 12a, 12b, 12c are moved by force around the joint point 14, preferably the rod (arrow L3). In the embodiment of the figure, the upper lip plate 10 is also articulated to the rod 14 by a joint 15.

By means of the actuators 13a, 13b, 13c, a counter-support is thus formed on the length of the lip cone K by the support shoes 12. The support shoes 12 rest freely on their lower side D on the upper surface 10 'of the upper lip plate 10 20. Thus, when the actuators 13a, 13b, 13c are placed in the desired relative positions, the desired lip opening A profile is also formed.

The denser the distribution of the support shoes 12, the more accurately the desired profile of the lip cone can be adjusted in the width direction of the track. The embodiment of Figure 1 has an L-shaped abutment portion 16 connected to the upper lip plate 10, the plate portion 16 'of which is located above the ends of the support shoes 12. Thus, by using the actuators 13a, 13b ... simultaneously, the upper lip plate 10 can be raised to a position where the lip cone K can be cleaned. Thus, no separate actuator is required to open the lip opening A.

Fig. 2 shows an embodiment of the invention, in which the upper lip plate 10 is supported by support shoes 12 supported by an actuator 13, which in the embodiment of the figure is a 4,86086 screw device. In the embodiment of Figure 2, the lower lower lip plate 11 is supported by a support shoe 12. The actuator 13 associated with the lower support shoe 12 is, in the embodiment of the figure, a hydraulic cylinder. Also in the embodiment of Fig. 2, a plurality of support shoes are located side by side in the width direction of the lip cone K in both the support of the upper lip plate 10 and the support of the lower lip plate 11 5.

Figure 3 shows the equipment of Figure 2 the direction of arrow C of Figure 2 seen from the direction. As shown in the embodiment of Figures 2 and 3, the support shoes 12a, 12b, 12c ... are located in both the upper lip plate 10 and the lower lip plate and so that each support shoe 10 can be adjusted by its own actuator 13a, 13b ... The support shoes 12 abut the lower end and the adjacent support shoes 12a, 12b ; 12b, 12c; ... and respectively in the bottom row 12a \ 12b '; 12b', 12c '... there is a free space V, thus allowing frictionless and independent adjustment of the support shoes 12.

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Claims (8)

5,86086 A method of adjusting the lip opening (A) of a paper machine headbox lip cone (K), the method comprising adjusting the paper machine headbox lip cone lip opening (A) to the desired width in the paper machine width by acting on at least one lip (13), characterized in that the method uses side-by-side support shoes (12a, 12b, 12c ...; 12a ', 12b', 12c '...), each support shoe being acted upon by an actuator (13a, 13b, 13c ... ) and that in the method each support shoe (12a, 12b ...) is adapted to rest freely and rest on the length of the lip cone (K) from its lower surface (D) against the lip plate (10 and / or 11), whereby the support shoe (12a, 12b ...) forms a straw base against the lip plate (10 and / or 11) along the entire length of the lip cone (K) and that in the method each support plate (12a, 12b) is articulated to pivot at the pivot point (14) and In the system, the lip opening (A) can be opened by the same actuators which act separately on each support shoe (12a, 12b ...), in which case a separate actuator for opening the lip cone (K) is not required. Method according to Claim 1, characterized in that a separate abutment part (16) is used in the method, on which the support shoes (12a, 12b, 12c ...) rest 20 when opening the lip cone (K). Method according to one of the preceding claims, characterized in that the lip opening (A) is adjusted to the desired position in the driving situation by adjusting the support shoe (12a, 12b ...) associated with each actuator to the desired position by means of an actuator (13a, 13b ...). ::: 4. Apparatus for adjusting the lip opening (A) of the lip cone (K) of a paper machine headbox, characterized in that the apparatus comprises adjacent support shoes 30 (12a, 12b) engaging the upper lip plate (10) and / or the lower lip plate (11) with plates adjoining the lip cone (K). 12c ...; 12a ', 12b', 12c '...), each support shoe (12a, 12b ...) comprising an elongate rim (D) along the longitudinal axis (X) of the lip cone (K), which is fitted freely abut against the associated plate surface (10 'and / or 1Γ), each support plate (12a, 12b ...) resting on its plate surface (10' and / or 1Γ) over a wide area. Apparatus according to the preceding claim, characterized in that there is a joint 5 (14) to which each support shoe (12a, 12b ...) is connected, whereby each support shoe (12a) can be actuated by means of actuators (13a, 13b ...). 12b ...) and each support shoe (12a, 12b ...) can be brought into the desired mutual position with respect to each other, whereby during adjustment of said mutual position during the operation of the paper machine the lip plate (10 and / or 11) associated with the support shoe is bent so as to obtain 10 desired shape of the lip opening (A) of the lip cone (K) across the width of the headbox. Apparatus according to one of the preceding claims 4 or 5, characterized in that the support shoes (12a, 12b) are mounted on a rod (14) extending in the width direction of the lip cone, on which rod also a lip plate (10 and / or 11) is mounted. 15 Apparatus according to one of the preceding claims 4 to 6, characterized in that the apparatus comprises a abutment part (16) against which the support shoe (12a, 12b ...) rests when opening the lip opening (A) of the lip cone (K) for cleaning the lip cone (K). . Apparatus according to one of the preceding claims 4 to 7, characterized in that the rod (14) comprises a joint (15) for the lip plate (10 and / or 11). 7 86086