FI57988C - FOERFARANDE FOER UTBYTE AV ETT EN SLUTEN SLINGA BILDANDE VAEV I VIRA- OCH / ELLER PRESSPARTI I EN PAPPERSMASKIN - Google Patents

Description

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Patent Meddelat ^ * * (51) K * .ik.3 / int.a.3 D 21 F 1/26 FINLAND —FINLAND (21) (Wttih.k.fnu.-IWt.mefaUni 7715 ^ 0 (22) H «k * mtspi) YFT-AnaMminpd ·! 13-05 * 77 (23) AlkupUvt — Glltlghatadag 13.05-77 (11) Tullut Julklnksl - Bltvk offuneltg lU.ll.78 HMmtl- J. rekiftertliaintw e, **. „« „+,» * «,„ __

Patent- och regilterstyrelsen '' Anrtks »utta * d © eh utl.ikr1ft« n publkund 31.07.80 (32) (33) (31) utuelkeu »—Buglrd prlorituc (71) Valmet Oy, Punanotkonkatu 2, 00130 Helsinki 13, Finland -Finland (FI) (72) Pertti Soikkanen, Jyväskylä, Suomi-Finland (Fl) (7U) Forssen & Salomaa Oy (5U) Method for changing the tissue forming a closed loop in the wire and / or press section of a paper machine - Förfarande för utbyte av ett en sluten slinga bildande väv i vira- och / eller pressparti i en pappers-maskin

The invention relates to a method for changing the fabric forming a closed loop in the wire and / or press section of a paper machine, which method uses transverse edge splitting beams and detachable snacks arranged in the frame structure of the paper machine.

It is known that the wires of paper machines have a limited service life due to wear, so that they have to be replaced every few days or weeks.

As is already known in flat wire paper machines, the wire is changed e.g. by removing the wire surrounding different parts of the wire part, such as its chest roll, register rollers, guide rollers, scrapers, etc., and replacing the new wire as soon as possible to keep machine downtime short. In flat wire paper machines, the parts surrounded by the wire are mounted on support beams arranged on both sides of the paper machine, which are arranged on the control and drive side of the machine on cannon posts 2,57988. When changing the wire, the new wire is tensioned on the machine side on the wire bars and the components of the wire section inside the loop are moved on special side bars inside the wire loop tensioned on the machine side, then using the same beams and rollers deleted.

In paper-based paper machines, the replacement of the wires is carried out using edge-spreading beams as is already known, e.g. as follows. The applicant's "Sym-Former" (trademark) forming part (U.S. Pat. No. 3,846,235) has detachable snacks arranged in the vertical beams of its body, which are removed from the treatment side of the machine during wire change and the vertical loads transmitted by said snacks are supported on the machine operating side. lever transmission.

The applicant's "Speed-Former" (trademark) in a two-wire forming part (U.S. Pat. No. 5 * 346,232) also has removable snacks. In this forming part, the covering wire is in a moving carriage which, in connection with the wire change, is driven to a special wire change station with fixed lifting devices which provide the necessary vertical support forces on the drive side of the wire part by levers to remove the edge spreading beams. The Speed-Former support wire is replaced in the same manner as described above for the Sym-Former.

Referring to the prior art related to the present invention, reference is further made to U.S. Patent 2,473,100 (particularly Figure 9) and U.S. Patent 3,129,135, which discloses wire changing methods and apparatus using horizontal transverse edge spreading beams of a paper machine supported vertically on a substrate and its support. on the side there is a horizontal extension in the edge-spreading beams which extends outside the machine and has a vertical drawbar. Such support solutions in connection with the exchange of the wire have inherited the two-wire form in essentially unchanged form, but in this case several various drawbacks have emerged, which the present invention is intended to eliminate.

Of the above-mentioned drawbacks, it can be mentioned, first of all, that a very strong beam is required as a horizontal extension of the cantilever beam extending outside the paper machine, since this beam will be bent during support in connection with the exchange. The disadvantages of these cantilevered cantilever beams have also been that they take up a lot of space in the paper machine room and the transfer of relatively long cantilevered parts is cumbersome and requires special space.

In order to overcome the above-mentioned drawbacks, the invention is mainly characterized in that said support of the edge spreading beams is performed by a horizontal force component of traction members, such as drawbars, beams, cables or the like, arranged between the paper machine body and the paper machine building body.

As can be seen, according to the invention, the previously required strong beam can be replaced by a thin drawbar. The loads on the building frame through the vertical frame beams also reduce the load on the building frame, so that these vertical frames can be made even lighter.

The present invention can also be characterized in that the torque point previously located at the cantilever beam and its projection and the associated vertical body is caused to move to the lower end of said vertical body.

In the following, the invention will be described in detail with reference to an embodiment of the invention shown in the figures of the accompanying drawing, to the details of which the invention is in no way narrowly limited.

Figure 1 shows a schematic side view of a two-wire "Speed-Former" forming part applying the wire change method according to the invention.

Figure 2 shows the same as Figure 1 seen from above.

Figure 3 shows a section A-A in Figure 1.

According to the figures, the two-wire forming part comprises a supporting wire 1 and a forming roll 2 and a suction roll 3 inside its closed loop. The guide rollers 4 control the passage of the supporting wire loop. The supporting wire 1 and the covering wire 3 have a common run from the forming plate 2 to the suction roll 3. The passage of the covering wire 5 is controlled by its chest roll 6 and guide rollers 7.

, 57988 4

The forming element comprises a frame-side bearing columns 8a and 9a, and the drive-side bearing columns correspond 8b and 9b. The pillars 8a and 9a are connected by a frame beam 10a and a beam 10b on the drive side, respectively.

5 in connection with the covering of the wire frame structure is the front side vertical frame 11a and a corresponding side of the vertical frame 11b. This body part is placed on the exercise bikes 12 to be displaced.

Removable snacks 13 in the vertical pillars 8a and 9a of the wires 1 and 2 and snacks 14 in the vertical body 11a · For replacing the wires 1 and 5, the body of the load-bearing wire 1 has edge-spreading beams 15 and cover-body beams 17 connecting the longitudinal frame beams 17, respectively. According to the invention (Figures 1 and 5) has the ends of cantilever beams 15 and 16 of the paper machine drive side connected to the drive rods 22 of the paper machine frame of the building, so that according to the invention cantilever beams 15 and 16 support snacks 13.14 detaching and being disconnected is performed vetosau-membranes of said 22 horizontal force component.

According to the figures, the drawbars 22 are arranged horizontally and parallel to the edge spreading beams 15 and 16. In connection with the drawbars 22, power devices 23 are arranged, by means of which the snacks 13,14 can be released from vertical loads for their removal. The drawbars 22 are attached at one end 25 to the frame of a paper machine, preferably at the top of this frame, and at the other end 24 to a horizontal mounting beam 21 located behind the vertical support columns 18 of the building, as shown.

Figure 3 shows the floor level 19 and the intermediate level 20 of the operating platform of the paper machine room, and according to the invention it is advantageous in some cases to connect the traction members 22 to the intermediate level 20. It is also advantageous, for example, for such structures in which the traction members 22, e.g. wires, are connected to the concrete reinforcement of the structures of the paper machine building.

Instead of drawbars 22, corresponding drawbeams or wires can be used, the direction and position of which are determined mainly by the location of suitable support points.

Claims (7)

5,57988 The method of the invention is particularly well suited for use in two-wire forming members for the replacement of both a covering wire and a carrier wire. However, the invention is also suitable for use in connection with the replacement of conventional flat wires. In this case, vertical beams can be arranged in suitable places in connection with the body of the paper machine, by means of which, in connection with the wire change, the horizontal supporting forces according to the invention are obtained for the edge spreading beams. When applying the invention in the former part according to Fig. 1, in which the covering wire 1 is placed on a carriage movable by wheels 12, the traction members 22 can be placed at the wire changing station either permanently or with different connectors. Various quick connectors or even screw connections can be used in the paper machine body mounting end 25 of the pull members 22. In addition, the traction members 22 can be made telescopic and placed in the space between the side frames of the paper machine when not in use. The invention is in no way narrowly limited to the details described above by way of example only, which may vary within the scope of the inventive idea defined by the following claims. A method for replacing a closed loop forming fabric in a wire and / or press section of a paper machine, the method using transverse edging beams (15,16) and removable snacks (13,14) fitted to the frame structure (8,9,11) of the paper machine, the method comprising edging (15,17) for removing the snacks (13, 14) is supported on the frame of the paper machine building at its opposite end from said snacks (13, 14), characterized in that said support of the edge spreading beams (15 * 16) is performed by traction elements arranged between the paper machine frame and the paper machine building frame. , such as a horizontal force component of drawbars (22), - beams, cables or the like. 6 5 7 9 8 8 Method according to Claim 1, characterized in that the drawbars (22), beams or cables are arranged to be substantially horizontal. Method according to Claim 1 or 2, characterized in that in connection with the traction elements (22) there is a power device (23) »by means of which the snacks (13» 14) can be released from the loads. Method according to Claim 1, 2 or 3, characterized in that the traction members (22) are connected to the upper part of the body of the paper machine. Method according to Claim 1, 2, 3 or 4, characterized in that the traction elements (22) are connected to the intermediate level (20) of the paper machine room license. Method according to Claim 1, 2, 3, 4 or 3, characterized in that the tension members (22) are connected to the concrete reinforcement of the structures of the paper machine building. Method according to claim 1, 2, 3, 4, 3 or 6, characterized in that the traction members (22) are connected to a beam (21) fixed to the vertical pillars (18) of the paper machine building.