FI125072B - Lifting arrangement with quick locking - Google Patents

Description

LOCKING LIFTING SYSTEM

BACKGROUND OF THE INVENTION The invention relates to a quick-lockable lifting device arrangement for supporting and mounting a bearing housing of a roll of paper or board machine at a selected angle, which roll is a belted roll, e.g. a shoe roll comprising one support arm adapted to bind the lifting arm support point and the bearing housing lifting point, deflection means for displacing the bearing housing lifting point laterally.

The process of manufacturing a fibrous web is generally found in at least one roller having a webbing belt, for example a shoe roll, in the course of which the webbing is detached from the ends of the shoe roll and threaded longitudinally out of the shoe roll. During maintenance, the shoe roll should be lifted off the counter roll forming the press nip with it. Each time the shoe roll belt shoe roll is removed from the fiber web machine, the shoe roll is lowered back into place against the counter roll by means of a quick-locking lifting arrangement.

When the shoe roll is re-mounted on the counter roll, the bearing surfaces of the shoe roll and counter roll bearing housings must be aligned with each other. Often in press nipples, the shoe roller and counter rolls are aligned with each other such that the line is not directly vertical but oblique to the vertical. In this case, the bearing surfaces of the bearing housings are also inclined relative to the horizontal. Further, the locking means between the shoe roller and the counter roller bearing housings should also be aligned with each other.

One such prior art lifting arrangement is known from US 5,404,811 A, wherein the shoe roll bearing housing has a laterally adjustable support arm, which in turn is secured by a separate adjustable support arm to the lifting device by means of a separate spacer. There is also a separate lateral adjustment for the spacer to push the spacer laterally. By means of adjustments, the bearing housings of the shoe roll and the counter roll are aligned with each other in respect of the stop surfaces and the locking means. As a whole, the arrangement is remarkably complex, and making one adjustment affects the other two, forming a complex control arrangement. Further, the attachment between the shoe roller and the support arm is structured to increase the complexity of the adjustment, which makes it difficult to align the shoe roller and counter roller bearing housings.

It is an object of the invention to provide a simpler quick-locking lifting arrangement than prior art solutions, which is also more advantageous than prior art lifting arrangements for the removal of the belt diaper. This object may be achieved by a quick-locking arrangement of lifting means for supporting and mounting the bearing housing of the roll of a paper or board machine at a selected angle, which roll is a rolled belted roll, for example a shoe roll. The lifting arrangement includes a lifting point in the bearing housing, a lifting arm to be used by the lifting means and a slot formed therein, at least one support arm adapted to tie the lifting arm and bearing housing lifting point to one another and deflection means for displacing the bearing In addition, the lifting arrangement includes pin engaging means at the bearing housing lifting point, comprising at least a slot in the bearing housing and an opening in the support arm, and a pin connecting the slot and the opening. The deflection means is arranged in connection with the pin connection means for displacing the lifting point laterally. The solution according to the invention can provide a remarkably simple lifting arrangement in which the alignment of the bearing surfaces of the bearing housings is easier than prior art solutions. Furthermore, the solution according to the invention achieves a structure much simpler than prior art lifting arrangements.

Preferably, the lifting point is the same molded or integral part of the same as the bearing housing. In this way, the mounting of the bearing housing to the support arm can be arranged without separate spacers.

Preferably, the lifting arrangement further comprises upper pin engaging means at the support point comprising a slot on the lifting arm and an opposite upper slot on the support arm, and an upper pin connecting these slots. By means of the upper pivoting means, the linkage of the support arm to the lifting arm can also be formed in a convenient and adjustable manner.

Preferably, the lower deflection means is integrated into the bearing housing. This way, they do not need to be removed from the bearing housing at any time, reducing the need for adjustment.

Preferably, the pin connection means are eccentrically disposed within the bearing housing. The eccentric positioning provides that the bearing housing can be pivoted at right angles by the weight of the bearing housing itself when the pivoting means is deflected laterally from the center of mass of the bearing housing.

The shape of the bearing housing may be adapted to follow substantially the shape of the cross-sectional surface of the shoe roll by at least one third, preferably at least the upper half of the shoe roll strap circumference. In this case, any points in the bearing housing that may be in contact with the belt diaper during its replacement are following the shape of the shoe roll surface and do not damage the belt mantle material.

According to one embodiment, the upper slot of the support arm is at least three times as long as the diameter of the upper pin. In this case, lifting the roller can avoid breaking the lifting arrangement if the roller is accidentally lifted too high. With a larger Hahlo, the link arm can move much higher without breaking, allowing for incorrect lifting of the roller to be noticed before the lifting mechanism is damaged.

Preferably, the control arm is connected directly to the bearing housing. This results in a simple structure that is easy to manufacture and adjust.

According to one embodiment, the upper deflection means comprises at least one actuator for moving the pin in the slot. The carriage allows the pin engaging means to be moved accurately within the slot to find a suitable adjustment for aligning the bearing housings.

According to one embodiment, the lower deflection means comprises at least one adjusting member for moving the pin in the slot. The carriage allows the pin engaging means to be moved accurately within the slot to find a suitable adjustment for aligning the bearing housings.

Preferably, the bearing housing includes lugs spaced apart, between which lugs are fitted by means of pin-coupling means. The brackets allow the support arm to be attached directly to the bearing housing. There may also be only one fixed bearing housing bracket.

The lifting arrangement according to the invention can replace the expensive and impractical adjustment structure known from the prior art, which includes a spacer and an adjusting part which is fastened with loop screws. Now, the extra-heavy-duty loop screws and spacer made of special materials can be completely eliminated, reducing the investment cost of the lifting arrangement. The lifting arrangement according to the invention can be made of general iron alloys without particularly strong structures, since the lifting arrangement is formed directly into the bearing housing casting or otherwise as an integral part of the bearing housing.

Further, the lifting arrangement according to the invention is suitable for use on all common press nip angles. With the lifting arrangement according to the invention, it is much easier to replace the press roll with prior art solutions, since the angle and lateral adjustments are almost completely independent, so that no complicated, interdependent event occurs in alignment of the bearing housing. Further, in the lifting arrangement according to the invention, the support arm can be easily detached from the shoe roll bearing housing without making lateral adjustment of the support point or lifting point or removing or loosening the parts. This also makes it easier to position the bearing housing when reinstalling the shoe roll, as previous adjustments have remained virtually unchanged, making it easier to find the correct bearing position.

The invention will now be described in detail with reference to the accompanying drawings, in which:

Figure 1 is a side view of the joint between the shoe roll and its counter roll;

Fig. 2 is an enlarged view of the support arm of the lifting arrangement of the invention and related parts taken along the shoe roll,

Fig. 3 is a sectional enlarged view of the support arm of the lifting arrangement according to the invention and related parts taken in transverse direction of the shoe roll.

Figure 1 illustrates in general the joint between shoe roll 12 and counter roll 14 when locking means 110 is locked. In the locked position, the bearing housing 20 of the shoe roll 12 and the bearing housing 20 'of the counter roll 14 are aligned with portions of their abutment faces 100 so that the lugs 104 of the bearing housings 20 and 20' included in the locking means 110 are aligned with the connecting arms 102. In order for the belt sheath 12 of the shoe roll 12 to be removable around the shoe roll 12 during belt changing, the locking means 110 must be opened and the shoe roll 12 lifted to the air. The belt diaper 16 is shown in Figure 2. Folding of the shoe roll 12 over the counter roll 14 must be accomplished by a lifting arrangement according to the invention since, with a conventional crane, it is practically impossible or at least very difficult and time consuming to align the counter surfaces 100.

Figure 1 shows a lifting arrangement 10 according to the invention. Only one end of the shoe roll 12 is illustrated, but it should be understood that the shoe roll 12 naturally has two ends. The lifting arrangement is mainly intended for lowering the shoe roll over the counter roll, but the lifting arrangement is also used to lift the shoe roll off the counter roll.

As shown in Figure 1, shoe roller 12 is supported on shaft member 62 in bearing bracket 20. Lifting arrangement 10 includes a lifting point 18 in bearing housing 20 and a lifting arm 24 provided by a lifting means 22 and a support 28 formed by a slot 26. 200. Between the lifting arm 24 and the lifting point 18 of the bearing housing 20 there is at least one support arm 30 for connecting the supporting point 28 of the lifting arm 24 and the lifting point 18 of the bearing housing 20. In other words, the shoe roll 12 is suspended from the lifting point 18 of the bearing housing 20 by means of the supporting arm 30 to the lifting arm 24. To align the bearing tail 20 with the bearing housing of the counter roll, deflection means 38 are provided for displacing the bearing bearing housing 20 at lifting point 18, comprising at least slot 42 in bearing housing 20 and opening 44 on support arm 30 and pin 46 connecting slot 42 to opening 44. Lateral or cross-sectional lateral direction herein refers to the pivotable arrowheads in Figs.

The opening 44 is shown in Fig. 2. The deflection means 38 is arranged in connection with the pin connection means 40 to move the lifting point 18 aside. Preferably, a single link arm is used in the lift arrangement according to the invention, but if necessary, several link arms centrally articulated between the link arm and the bearing housing may also be used.

As shown in Figure 1, the lifting arm 24 may be a composite arm of two parallel metal plates 92 articulated at one end 70 by a joint 72 to a fiber web frame 200 and another end 74 by a hinge 76 to a lifting means 22. Preferably the support arm 30 is articulated 28. The lifting means 22 may be, for example, a hydraulic cylinder or the like, which at its other end is articulated with the fiber web machine body 200. By changing the length of the lifting means 22, the lifting arm 24 can be tilted, i.e. the support point 28 can be moved farther or closer. The structure of the lifting arm lifting means shown in the figures is only one exemplary embodiment and it should be understood that the lifting arm can also be operated by various structural solutions, for example by means of two hydraulic cylinders. The structure of the lifting arm may also differ from that shown in the figures, provided that the structure is suitable for lifting the shoe roll.

Preferably, the lift arm 24 also includes upper deflection means 48 for moving the support point 28 between the support arm 30 and the lift arm 24 laterally. In other words, this means that the support point 28 can be moved substantially back and forth in the longitudinal direction of the lifting arm 24. By means of the upper deflection means 48, the bearing housing 20 of the shoe roll 12 can be displaced laterally relative to the bearing groove of the counter roll. Advantageously, the deflection means may have the same structure for both the upper deflection means 48 and the lower deflection means 38. Preferably, upper pin engaging means 32 is also used between the support arm 30 and the lift arm 24. The upper pin engagement means 32 may include at least slot 26 on the lift arm 24 and slot 34 in the support arm 30 and upper pin 36 connecting the slots 26 and 34.

The lifting arrangement according to the invention is generally used in such a way that the lifting arrangement 10 is permanently attached to the bearing housing 20 of the shoe roll 12. This lifting arrangement enables the shoe roll to be lifted remarkably quickly, the locking means between the bearing housings being opened. The lifting arrangement is used whenever the shoe roll removing / lifting, even though the belt mantle to finish the first-side end of the lifting arrangement is moved from the lifting device on the exchange. (usually with a roof crane). The lower pivot joint of the linkage is then removed and the linkage is lifted out of the belt shroud along the linkage. At shoe roll removal, the lifting arrangements at both ends are removed after lifting and the roll is removed from the machine by other lifting equipment. The lifting step is not so critical with respect to the direction as the shoe roll is allowed to position freely. When the shoe roll is lowered back to the bearing housings of the counter roll, a lifting arrangement 10 is required. The lifting arrangement enables the landing to be carried out in a very controlled manner and with much greater accuracy than with a roof crane. With respect to the landing, it is essential that the bearing housing 20 of the shoe roll 12 be oriented with respect to the bearing housing of the counter roll by means of deflection means. For the alignment, the lateral alignment of the bearing housing 20 and the alignment of the bearing surfaces of the bearing housings 100 can be adjusted in the desired order.

2, the bearing arrangement 20 can be lifted by at least 10%, preferably by more than 15%. The lifting allowance may be, for example, 100 to 300 mm. Figure 1 shows a dashed line of possible bearing housing 20 raised. Preferably, the upper deflection means 48 adjust the lateral displacement of the bearing housing 20 of the shoe roll 12 relative to the longitudinal direction of the lifting arm 24, and the deflection means 38 in turn adjust the inclination of the bearing housing 20 relative to the pin engaging means 40. The lifting arrangement 10 is at both ends of the shoe roll 12 in connection with the body 200 of the fibrous web machine. The lifting arrangement according to the invention is suitable for use with rolls of different widths and the roll length may vary from 4 to 12 m, the length of which refers to the transverse direction of travel of the fibrous web.

The pin engaging means 40 shown in Fig. 2 may be designed to include a pin 46 disposed in the slot 42 formed in the bearing housing 20 as shown in the figure. The pin 46 is movable in the longitudinal direction of the slot 42. Preferably, the upper edge of the bearing housing 20 includes two planar parallel lugs 94, i.e., a plate surface, spaced from each other, between which lugs 94 of the lifting arm 30 of the lifting arrangement are locked. By means of the lugs 94, a space is provided inside the circumference of the bearing housing 20 for the support arm 30, allowing the use of the pin connection means 40. The two lugs 94 comprise identical slot holes which together form a slot 42 for the pin 46. Preferably, the longitudinal dimension of the pin 46 is such that the pin 46 extends between the two hollow holes of the slot 42 while passing through an opening 44 in the support arm 30. Preferably, the pin is slightly wider than the opening.

Preferably, the portion 46 of the pin engaging means 40 is retractable, wherein the support arm 30 may be detached from the bearing housing 20 of the shoe roll 12 to replace the belt sheath when the shoe roll 12 is supported on the belt changing means. For the pin 46, the bearing housing 20 may include a housing 82 (Figure 3) to which the pin 46 may be partially supported. The housing 82 prevents the pin 46 from falling, since a steel pin having a diameter of 100 mm, for example, can pose a great danger when falling. The link arm 30 may include manual actuators, for example, crank 80 of Figure 1, by which the link arm 30 can be pivoted substantially parallel to the lift arm 24, leaving more space for changing the belt diaper.

The deflection means 38 may be, for example, the hinge screws on either side of the pin 46 or only one adjusting member 96, as shown in Figure 2, for moving the pin 46. According to one embodiment, the pin may be disposed inside a separate carriage, whereby only the carriage is pushed by means of a wheel screw as the pin moves with the carriage. Preferably, the hinge screw 96 of the lower deflection means 38 is articulated or fixed at one end to the bearing housing 20 and at the other end around the pin 46 in connection with the lower slot 42. The adjusting member of the upper deflection means 48, i.e. the wheel screw 90, in turn, is preferably pivotally connected at one end to the lift arm 24 and at the other end to the support arm 30 by means of the upper pin 36. Both the upper pivot means 32 and the lower pivot means 40 may be of the same construction. Similarly, the upper deflection means 48 and the lower deflection means 38 may have the same structure.

Referring to Figure 2, the deflection means can move the lifting arm 18 of the support arm 30 and the support arm 28 in the lateral direction about 30 mm in each direction relative to the center of the slot. The lower deflection means 38 can move the lifting point 18 aside from the vertical line of the center of gravity of the bearing housing 20, whereby the bearing housing 20 rotates as the center of gravity is in relation to the suspension in a vertical line. If it is desired to suspend the bearing housing 20 such that the stop surface 100 is completely horizontal, the lifting point 18 must be moved along a vertical line with the center of mass of the bearing housing 20. On the other hand, if the bearing housing 20 is to be tilted, the lifting point 18 is deflected from the vertical center of the center of mass by deflection means 38. Preferably, the inclination of the bearing housing may be in the range of 0 to 30 °, which means the angle of the bearing surface of the bearing housing relative to the horizontal. The angle can be counterclockwise or clockwise.

Figure 3 is a cross-sectional view of the support arm 30 shown in longitudinal direction of the lift arm. In this cross-section, the lifting arm 24 is comprised of two spaced-apart metal plates 92, each having slot holes forming a slot 26 (Fig. 2) for the upper pin 36 of the upper pin engaging means 32. As shown in Figure 2, the upper pin 36 extends between the metal plates 92. On the inside of the metal plates 92 of the lifting arm 24, the plates 91 of the upper screw 36 are attached around the upper pin 36 by means of the plates 91 to move the upper pin 36 freely in the longitudinal direction of the slot 24 of the lifting arm. Correspondingly, the plates 93 of the lower rim screw 96 (Fig. 2) disposed between the lugs 94 of the bearing housing 20 are also provided. The plates 93 allow the pin 46 to be moved freely in the longitudinal direction of the slot 42 of the bearing housing 20. Figure 3 also shows how the upper slot 34 is preferably substantially higher than the diameter of the upper pin 36, allowing a small vertical movement of the support arm 30 without breaking parts of the lifting arrangement.

According to one embodiment, the deflection means may be longitudinal slot screws on each side of the stud carrying carriage for moving the carriage within the slot. According to another embodiment, the upper deflection means may also be completely different from the figures, for example, a rail and a carriage in which the carriage is articulated with a support arm and the carriage moves along the rails in the longitudinal direction of the lifting arm.

According to Figures 1 and 2, the bearing housing 20 is preferably shaped such that the outer circumference of the upper portion of the bearing housing following the belt sheath 12 of the shoe roll 12 is adapted to substantially conform to the shape of the shoe roll belt sheath. Preferably, this circular or elliptical portion is the upper side 99 of the bearing housing 20 in the operating position, so that, for example, when changing the belt shell, the likelihood of damage to the belt housing shapes of the bearing housing is greatly reduced. The bearing housing of the lifting arrangement of the invention can support the belt sheath during its installation. The curved surface of the bearing housing does not include sharp surface shapes, projections or planed angles that could damage the belt sheath when replacing the belt. Thus, when replacing belt liners, the proportion of belt liners damaged against the bearing housing is eliminated compared to prior art sharp-angle bearing housing structures. In the lifting arrangement according to the invention, the upper surface of the bearing housing can be shaped to conform to the shape of the cross-section of the roll by the use of pin connection means. In prior art lifting arrangements, the upper part of the bearing housing must have had a flat connecting surface for the spacer, which has prevented the circular shape of the bearing housing.

Advantageously, the lifting arrangement according to the invention can be used on the press section of the fiber web machine, but also the calender unit connected to or separate from the fiber web machine is an advantageous application for the lifting arrangement according to the invention.

Claims (10)

A quick-locking lifting arrangement for supporting and mounting a bearing housing of a paper or board machine roll at a selected angle, the roll (12) being a belted roll (12), for example a shoe roll (12) comprising a lifting arrangement (10) in a bearing housing (20), - a lifting arm (24) driven by the lifting means (22) and a support point (28) therein formed by a slot (26), - at least one support arm (30) adapted to tie the support arm (28) of the lifting arm (24) and 18) to each other, - deflection means (38) for laterally displacing the lifting point (18) of the bearing housing (20), characterized in that: - the lifting device arrangement (10) includes pin connecting means (40) for lifting the bearing housing (20) (20) and an opening (44) on the support arm (30) and a pin (46) connecting the said slot (42) and the opening (44), - deflecting means (38) arranged in connection with the rails (40) for displacing the lifting point (18) laterally. Arrangement according to Claim 1, characterized in that the lifting arrangement (10) further comprises upper pin engaging means (32) at the support point (28) comprising said slot (26) on the lifting arm (24) and the opposite upper slot (34) on the support arm (30). (36) combining these slots (26,34). Arrangement according to Claim 1 or 2, characterized in that the deflection means (38) is integrated into the bearing housing (20). Arrangement according to one of Claims 1 to 3, characterized in that said pin connection means (32) are eccentrically disposed in the bearing housing (20). Arrangement according to one of Claims 1 to 4, characterized in that the shape of said bearing housing (20) is adapted to follow substantially the shape of the cross-sectional surface of the shoe roll (12) at least one third of the circumference of the shoe roll (12). Arrangement according to one of Claims 1 to 5, characterized in that said upper slot (34) is at least three times as long as the diameter of the upper pin (36). Arrangement according to one of Claims 1 to 6, characterized in that said support arm (30) is connected directly to the bearing housing (20). Arrangement according to one of Claims 1 to 7, characterized in that said upper deflection means (48) comprise at least one adjusting member (90) for moving the pin (36) in said slot (26). An arrangement according to any one of claims 1 to 8, characterized in that said deflection means (38) comprise at least one adjusting member (96) for moving the pin (46) in said slot (42). An arrangement according to any one of claims 1 to 9, characterized in that said bearing housing (20) comprises spacers (94) spaced apart, said support arms (30) being disposed between said studs (94) for attachment to pin engaging means (40). ).