KR910002617Y1 - Support apparatus for a dewatering unit in the web-forming section of a paper machine - Google Patents

Abstract

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Description

Supporting device for dewatering unit of web mating part of paper machine

1 is a schematic overall elevation view of a wetland portion of a paper machine in which a support device according to the present invention is used.

Figure 2 is a detailed side view of the device according to the present invention, a detailed break enlarged view of FIG.

* Explanation of symbols for main parts of the drawings

30: dewatering unit 32, 33: dewatering member

34,35: cover 36: beam

37: pressure medium filling member

The present invention relates to a dehydration unit for the web forming part of a paper machine, in particular a dehydration unit for use with a double wire former under the lower wire.

There are several known shoe structures for forming parts of double wire forming machines, but most of them are fixed and very robust. However, several vertically adjustable structures have also been disclosed, examples of which include US Pat. No. 3,994,774, Finnish Patent 6886, West German Patent 3406217.

U. S. Patent No. 3,994, 774 mentions the vertical adjustment of the lower dewatering unit by means of a pressure medium filling cylinder arranged in the corner, although it relates to a so-called gap former.

Finnish patent 69865 describes a molding shoe for a double wire forming part of a paper machine, which is made up of rows of several pivoted blades arranged transversely thereto. The blades of each forming shoe can be individually adjusted to have the shape desired by the leading surface. The rows of connected blades form a curved tip surface consisting of several partial planes.

West German Patent No. 3406217 has a lid of a dewatering unit underneath the lower wire with members that can each be adjusted to compress the web against the dewatering unit at the top of the lower wire at a pressure not equal to that of the other heat. In an embodiment, the heat of the member is connected to the flexible thin film, and the required pressure is applied below the thin film. By dividing the pressurized space at the bottom of the thin film into branched yarns, it is possible to change the pressure of the yarns, thereby controlling the compression effect applied to the web. As the number of separated seals in the pressurized space increases, the number of available non-uniform pressures also increases.

The relatively improved devices described above also have inherent drawbacks in structure. That is, neither of the above devices is applicable to the state of the art, for example the installation of a dewatering unit arranged on the other side of the web so that it can be adjusted relative to each other in the longitudinal direction of the web.

The apparatus described in US Pat. No. 3,994,774 can adjust the lower dewatering unit vertically, but such an apparatus cannot be applied directly to the unit. Placing the pressure medium filling member in the corner of the lower unit also places high demands on the rigidity of the unit when the width of the unit exceeds 5 m.

In Finnish patent 68875 all blades can be adjusted independently of one another, but during operation they cannot be adjusted, nor can they be adjusted in the direction of the web. In addition, in a wide paper machine, when the shoe of the above type is used as a counterpart of the upper dewatering unit, there is a problem due to the lack of rigidity.

Third, what is described in West German Patent No. 34262127 is a very advanced device, but has some drawbacks. Because of the complexity of the pressure medium chamber, in particular its control and feeding device, it is difficult to think that the device is conveyed in the direction of the web. In addition, when used as a corresponding unit of the inlet of the device, the cover must be in the form of a foil, which is not reliably attached since it is flexibly attached to the thin film of the pressure medium filling chamber cover. In this case the foils are vibrated by the pulsation of the pressure and thus do not have the advantage of the fixing member.

It is an object of the present invention to provide a large dewatering unit and its supporting device that eliminate or reduce the drawbacks of known devices. According to the present invention, the dewatering unit under the lower wire is supported by a non-clinical hose-type pressing member disposed laterally with respect to the paper machine direction, and the pressing member allows the dewatering unit to be adjusted vertically and horizontally. A dehydration unit is provided, which is characterized in that it can be immediately adjusted in various ways and has simple and reliable support means. Other features of the present invention are described in the utility model registration claims.

Hereinafter, the present invention will be described by way of example with reference to the accompanying drawings.

The device of the present invention is mainly for use in the long-term paper machine 1 as shown in FIG. In the simplest form, the wetland portion of the long mesh paper machine 1 is composed of a head box 2 and a long mesh wire portion 3, and the long mesh wire portion is a loop or a wire 4 or a breast. The roll 5, the other roller and the roller 6 and the dewatering member (7). The rear or downstream portion of the long wire section 3, ie the so-called web forming section 8, consists of an upper unit 9 above the web and a dewatering unit 30 below the lower long wire 4.

In the arrangement of FIG. 2, the dewatering unit 30 of the web forming part of the paper machine consists of two covers 34, 35 formed by a row of rod-shaped members 32, 33 extending laterally with respect to the wire. It is coupled to the joint (31). The lids 34 and 35 are supported by the beams 36 and extend laterally with respect to the machine extending direction of the beam sound machine, and are retractable and filled with a pressure medium (compressed air, hydraulic oil) 37. It is attached to the paper machine by a flexible container means so that the angular position of the covers 34 and 35 with respect to the paper machine can be adjusted in the longitudinal direction. In other words, the pressure exerted on the lower wire 4 by the covers 34 and 35 can be converted. This adjustment is made possible because the pressure of each hose type pressure member 37 can be adjusted independently of the other members 37. In addition, the cover (? 4, 35) is supported to be displaced by the member 38 which can be adjusted in the longitudinal direction with respect to the paper machine so that the dewatering unit 30 can be adjusted better, one end of the support member In the frame of the paper machine, the other end is connected to the cover 34. Since the hose-type pressure member 37 can be sufficiently adjusted, other longitudinal adjustment members are unnecessary. If necessary, the distance between the various covers can be adjusted.

The advantage of the hose element 37 is that the hose-like member 37 can be adjusted so that the lids 34 and 35 remain flat even if the beam 36 mounted transversely to the paper machine is bent under load. will be. The hose 37 also allows the lids 34 and 35 to descend to an extent such that, for example, the rod-shaped members 32 and 33 can be easily replaced. In addition, it is possible to form the hose-like member 37 in several parts along the longitudinal direction of the beam. That is, the hose can be divided into several short sections, each of which can be independently adjusted in pressure. In this way, it is easier to adjust the shape and the lower dewatering unit than the upper unit.

If necessary, the movement of the lids 34 and 35 can be restricted by a special restricting plate 39 which prevents the movement of the hose-like pressing member 37 from the top of the beam 36 during adjustment. The lids 34 and 35 are limited in various ways in the transverse direction. For example, a sliding surface on the side of the cover may be arranged so that the paper machine can move only in the longitudinal direction.

Although only the case where the cover of the dehydration unit 30 has two parts has been described above, the cover may be configured as one part or by connecting several parts together. Incidentally, only the case where the lid is made of the rod-shaped dewatering member is described, but they may be made in any suitable form. In addition, it is possible to make the support form of the side adjacent to the cover (34, 35) to facilitate the connection or to make the connection between the cover.

The adjusting means 38 is shown in FIG. 2 as a pressure medium filling cylinder but may be replaced by a manual screwdriver or any other suitable adjusting device instead.

As described above, the device according to the present invention achieves all the aforementioned objects with a simple structure and reliable operation. The above description is for one preferred embodiment of the present invention, which does not impose any limitation on the present invention, and the scope of the present invention is limited only by the following utility model registration claims.

Claims (3)

For dewatering unit 30 having a dewatering member 32,33 which forms part of a solid support cover 34,35 of a paper machine and arranged under a lower endless mesh web or lower wire In the supporting device, the lids 34 and 35 and the corresponding dewatering members 32 and 33 are firmly coupled to each other in one unit, and these units are stretched in the transverse direction of the choke between their edges. Possible flexible pressure medium filling vessel 37 and frame 36 are independently supported on the paper machine frame, the pressure of these vessels being individually adjustable, the vessel being a plurality of individually pressurized portions along its length. Support device, characterized in that it is connected to an adjustment member (38) and to each other at the position of the sign (31) so that the unit can be deflected to a horizontal position. 2. Device according to claim 1, characterized in that the hose-type pressure medium filling member (37) is located on the beam (36) so as to convey the cover in the longitudinal direction with respect to the direction of the paper machine. Apparatus according to claim 1 or 2, characterized in that the cover (34) is attached to the frame of the paper machine by one or more adjustment members (38) arranged in the machine length direction of the paper machine.