FI78940B - Lifting system for a blanket lead roller - Google Patents

Abstract

The invention pertains to a lifting system for a blanket lead roller, especially for lifting the lead rollers below the floor plane (T-T) in the compression area of a paper machine away from the cellar space (K) above the floor plane (T-T) in order to perform a blanket switch. The system includes a cable (24) or similar lifting device functionally connected to the blanket tightening device, and at least one upper steering device, preferably a break wheel (23). The cable (24) or similar lifting device is moved from the blanket stretching device to the aforementioned steering device, preferably a break wheel (23), and then via the break wheel on to the lead roller to be lifted.<IMAGE>

Description

78940 1 Felt guide roll lifting device Lyftanläggning för filtledvals 5 The invention relates to a felt guide roll lifting device.

The invention relates to a device in the press section of a paper machine, in particular the so-called in a closed press section for replacing a felt whose normal flow passes substantially in areas below the floor level of the paper machine room. In particular, press fabrics made of synthetic plastic materials require a felt change arrangement in which the guide rollers below the floor level of the paper machine must be raised above the floor level. Press fabrics made of synthetic plastic materials cannot withstand the folding of the fabric, and thus such felt-change arrangements as were considered, for example, in the case of textile felts, are not possible in the case of press fabrics made of synthetic plastic materials. Thus, felt exchange systems in which the felt loop is laterally encapsulated into a kind of myth which, when spread from the edge, is taken from the spaces at the open snacks 20 of the paper machine body around the rolls which the felt loop will surround and rotate during operation.

In so-called closed press parts, e.g. the applicant's press part Sym-Press II 25 (trademark), the replacement of synthetic fabrics is particularly problematic.

Applicant's FI publication 70 948 discloses a device for changing the press fabric of a press section of a paper machine, which device comprises one or more lifting devices arranged in the space above the floor level 30, by means of which the guide rollers below the floor level can be lifted above the floor level. These lifting devices are arranged in the vicinity of the square-beamed beam of the press section.

35 The use of separate cranes for lifting guide rollers when changing felts is also known.

2 78940 1 Known equipment solutions thus require separate lifting devices and thus constitute a separate cost factor.

The object of the invention is to simplify the felt exchange arrangement. The object of the invention is precisely such a device solution which is reliable and more cost-effective than known solutions.

The object of the invention has been achieved by a device solution in which it has been realized to utilize existing felt tensioning devices in basement spaces below the floor level of a paper machine room.

The device according to the invention is mainly characterized in that the wire or similar lifting member is operatively connected to the felt tensioning device and that the lifting device comprises at least one upper J5 guide member, preferably a folding wheel, and that the wire or similar lifting member is brought up from the felt tensioning device and preferably to the folding member. through it to a further guide roller.

The felt guide roll lifting apparatus according to the invention comprises wire guide members above the floor level 20. The wire or other similar lifting member is led below the floor level through the control elements, preferably the folding wheels, back down to the lifting guide roller located in the basement. In the most preferred embodiment of the invention, a felt tensioning apparatus is used in which the hydraulic motor of the felt tensioning apparatus 25 moves the carriage of the felt guide roller and in which in the apparatus the hydraulic motor moves with the carriage. A folding wheel or the like is arranged on the carriage of said tensioning device, whereby the wire can be passed through said folding wheel to the folding wheel or the like above the floor level and to the shaft of the guide wire to be further lowered. This equipment achieves twice the lifting height of the sled.

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.

3 78940 1 Figure 1 shows a side view of a press part of a paper machine "Sym-Press II", in which the device according to the invention can be advantageously used.

Figure 2 shows a side view of an apparatus solution according to the invention, in which the roll is lifted to the machine level using an existing felt tensioning device.

Figure 3 shows the device seen from the direction A of Figure 2.

Figure 4 shows another preferred embodiment of the device according to the invention, also seen in the direction of the arrows A in Figure 2.

Figure 5 shows an axonometric view of the tensioning device used in lifting the roll.

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Figure 6 shows a section I-I of Figure 5.

Figure 1 shows the structures below the Sym-Press press section. The lifting device arrangement according to the invention can be used in particular in the press structure according to Fig. 1 for lifting the guide rollers below the machine level to the machine level when changing the felt. The press comprises a suction roll 10, in connection with which press nips and N 2 are formed. The first press nip Nj is double-felt formed between the pick-up felt 11 and the lower felt 12. The lower blanket 12 runs under the guidance of its guide rollers 13,14,15, 25 16,17 and 18. The term blanket in the context of the present invention means a generic name and encompasses all the fabrics of the press section.

The present invention provides an apparatus with which the lower felt 12 of the press section or other similar press sections, i.e. 30, running in the basement or other similar spaces, as described above, can be replaced. As shown in Fig. 1, the lower felt 12 passes in the basement spaces K below the floor level T-T of the paper machine room, where it is not possible to operate with cranes above the paper machine room. The felt 12, which is e.g. a blanket of synthetic plastic, passes after the press nip to the guide roll 35 14 and downwards to the guide roll 15. After the roll 15, the felt 12 is guided to a roll 16 external to the felt loop 19. The felt 12 running between the rolls 15 and 16 has known felt repair conditions. 4 78940 1 equipment. From the roll 16, the felt 12 is directed to a guide roller 17 in the felt tensioning device, which is attached to the carriage 20 of the felt tensioning device. By moving the carriage 20 in its guides 21, the basic tension of the felt loop 19 can be adjusted. Reference numerals 17a and 17b show the extreme positions of the 5 guide rollers 17.

Fig. 2 shows a side view of a device arrangement of how the folding wheels 22, 23 can be used to raise the guide roller 17 to the machine level above the floor level T-T.

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According to the invention, the carriage 20 can be provided with means according to the invention for raising the guide roller 17 to the machine level and above the floor level T-T. The means for raising the guide roller from the basement space K above the floor level T-T comprise a wire 22 or a corresponding hoisting rope folding wheel 22 attached to the carriage. The folding wheel is preferably fixed to the side surface of the carriage 20. The apparatus further comprises a second deflection wheel arranged at machine level above floor level T-T. In connection with the invention, folding wheels are generally referred to. The folding wheels therefore form the most advantageous embodiment of the invention. Instead of folding wheels, other control elements guiding the wire, e.g. guides or the like, can also be used.

As shown in Fig. 2, the guide roller 17 is mounted on a carriage 20. As shown in Fig. 2, the carriage 20 is movable in the direction shown by the arrow 25. Attached to the carriage 20 is a deflection wheel 22 of a wire 24 or other similar lifting member. The other end of the wire 24 is attached to a fixing means 25 in a fixed beam P. The wire 24 is attached to the guide roller 17 shaft 17aj, 17a2 * 30 via a deflection wheel 23 above floor level T-T.

When the carriage 20 is moved in the direction shown by the arrow, the guide roller 17 is raised to the upper position shown by the broken lines in Fig. 2 (arrow L2) after the bearing means have been removed. That station is also a felt exchange station.

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Figure 3 is a view of Figure 2 taken in the direction of the arrows A. As shown in Figure 3, the apparatus comprises similar means 22,23,24,25 on each side of the central axis X 5 78940 1 for raising the guide roll 17.

Figure 4 shows another embodiment of the invention. The view corresponds to the opposite direction from Fig. 2 to the view from Fig. 3. In this embodiment of the invention comprises an apparatus only kayttöpuolen carriage 20 of the sheave 22. The wire 24a, a second end secured to the beam by fixing means 25. The wire 24 is inserted beam 25 mounting the diverting sheave 22 through the floor level TT overhead diverting pulley 23a and 10 from the guide roll 17 to the shaft I7a1. The second wire 24b is fixed to the kayttöpuolen bar mount 25 and is exported to the drive-side carriage 20 through the fixed sheave 22 of the floor-level T-T overhead diverting pulley 23a and thence to the height corresponding to the service side sheave 23b via a straight guide roll 17 to the second 15 end shafts \ 7a ^.

24 export cable is also possible in such a way that the cable is attached to the guide roll 17 to the second end shafts 17a ^ and passed through an upper sheave 23a of the drive-side carriage 20 to the sheave 22, and 20 on to the diverting pulley 22 through the beam P, or some other fixed structure of the press on the engaging means 25. Through said fastening means 25 the wire is returned to the first deflection wheel 22 on the carriage 20 and through it to the deflection wheel 23a above the floor level TT and further to the second deflection wheel 23b above the floor level 25 TT and through it to the second shaft pin 17a2 of the guide roll 17>

Figure 5 shows a felt tensioning device used in a lifting arrangement according to the invention. The felt H (shown in broken lines) is passed over the wire 17 roll 17. The guide roller 17 is fastened from its shafts 17β1, 17β2 to the bearing hole 27,28. The bearing blades are still located in a fixed position on the carriage 20. The carriage 20 is adapted to move parallel to the river section 21. The guide 21 comprises a central opening G. The lower surface 21a adjoining the opening G acts as a job surface and the upper surface of the opening G comprises a toothing 29.

35 The hydraulic motor 30 is adapted to rotate the intermediate shaft 31, the intermediate shaft further engages the two carriages as well as treatment-side and drive-side carriage 20, and comprises toothed wheels 32 which engage six 78940 1 of the guide portion 21 of the teeth 29. The tray 20 further includes wheels 33 or the like slides, on which the The sled is soluble along the surface. The hydraulic motor 30 has pressure medium outlets 34.

5 The guide roll 17 is moved in the arrow L? Shown in the driving side engaging with the slide of the hydraulic motor 30.

Fig. 6 is a partially schematic sectional view of a clamping device according to the invention taken mainly along the section line T-I of Fig. 5. The hydraulic motor 30 is adapted to engage the carriage 20 and is not adapted to rotate the gears 32 and the intermediate shaft 36. The gears 32 further engage the toothing 29 at the top of the central intermediate space E of the guide 21. The carriages 20 are adapted to move along the guide surface 21a on the wheels 33.

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The embodiment of Figures 5 and 6 corresponds to the embodiment of Figure 4. Only the second carriage 20 comprises a folding wheel 22 of the wire 24 (shown in broken lines). Only one beam structure P is provided with guide means and / or fastening means 25 for the wire 24.

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With the device arrangement according to the invention, it is possible to achieve a lifting height twice the travel distance of the carriage 20 by using the folding wheels.

An embodiment of the invention is also possible in which the felt crossing device comprises a motor adapted to move the carriage via transmissions. According to the invention, a winch wheel is connected to this motor and a rope, wire or the like is fed to the end shafts of the guide roll to be lifted via corresponding folding wheels 23 above the floor level T-T, as shown in the previous embodiments of the invention.

The cut-off of the lifting movement at the end of the lifting can be performed with the help of limit switches. for a period of Huovanvaihdon roll count on of separate brackets and a front side rope is deleted marsh 35 figures is of Figure 3 according to a service side cord is taken care of diverting pulley 22 and further fastening means 25. When using the solution according to Figure 4 can roll to leave for a period of huovanvaihdon from cables.

Claims (5)

A felt guide roller lifting system, especially for lifting the guide rollers below the floor plane (TT) in the pressing portion of a paper machine 5 from the floor space (K) above the floor plane (TT) to change felt, the roller assembly comprising a cable member (24) or equivalent. characterized in that the cable (24) or corresponding lifting means Mr is functionally connected to the felt tensioning device and that the lifting system comprises at least one upper control means, preferably a breakwheel (23) and that the cable (24) or the corresponding lifting means is brought from the felt tensioning device to the felt tensioning device. , advantageously to the breakwheel (23) and through this to the articulated roller to be lifted. 1 Patent claim 2. A felt guide roller lifting device according to claim 1, characterized in that the system comprises a second guide member in the jaw (20) of the felt tensioning device, preferably a breakwheel (22), and the system comprises a fastening tool (25) for the cable (24) or corresponding lifting means. in the fixed structures of the press section and 20 that the cable (24) or the corresponding lifting member is guided from the attachment tool (25) via the second guide member in the quay (20), which is advantageously a breakwheel (22), up to the guide member for the cable or equivalent above the floor plane (TT) advantageously to the breaking wheel (23) and via this further down to the articulation roller (17), whereby when the sled (20) is moved, the articulation roller (17) is raised above the floor plane (TT). 3. A felt guide roller lifting system according to the above claim, characterized in that the system comprises lifting tools (22,23,24,25) of the same type on both the operating and maintenance side of the machine and that the wires (24) or corresponding lifting means on the operating and maintenance side are connected from the ends to the guide roller (17) to be lifted, advantageously to its shaft pins (Πα ^, ΠΆ ^) · 4. A felt guide roller lifting device according to claim 1, characterized in that the system comprises a control means for the wire (24) or other corresponding lifting means only in one of the sledge (20) of the felt tensioning device, advantageously controlling means which lie