FI130575B - Lifting auxiliary device and method for transferring a pulp dryer's fan by means of a lifting auxiliary device - Google Patents

Abstract

The invention relates to a lifting aid device (10) for a fan (12) of a pulp dryer (100), which lifting aid device (10) comprises - lifting means (14) for attaching the fan (12) to be lifted to the lifting aid device (10), and - first fastening devices (16) for locking the lifting device (14) to the fan (12) during lifting, - a guide (18) including a first end (20) and a second end (22), - a slide (24) arranged on the guide (18) ) for moving the fan (12) on the guide (18) when said lifting device (14) is suspended in said sled (24), - support device (28) connected to said guide (18) for suspending the lifting aid device (10) in a second fan (13) so that said guide (18) is supported substantially horizontally by means of said support device (28). The invention also relates to a method for moving the fan (12) of a pulp dryer (100) using a lifting aid (10).

Description

LIFTING DEVICE AND METHOD FOR TRANSFERRING A PULP DRYER FAN

WHY A PULP DRYER WITH THE HELP OF A LIFTING DEVICE.

The subject of the invention is a lifting aid device for a pulp dryer fan, in which the lifting aid device includes - a lifting device for attaching the lifting aid device to the fan to be lifted, and - the first fastening means for locking the lifting device to the fan during lifting.

The subject of the invention is also a method for moving the fan of a pulp dryer from the pulp dryer using a lifting aid.

When drying pulp with a pulp dryer, a large number of circulation fans are used. The circulating air fan of the pulp dryer consists of a fan part (impeller, frame and motor) and a wiring harness. Circulating air fans are in the fan towers on top of each other in the pulp dryer. If the circulating air fan, referred to from now on as the fan, impeller or motor, needs to be replaced, the fan part must be completely removed from the pulp dryer and the wiring harness. The removal takes place with a specially made lifting aid, which is attached to a bridge crane, an I-beam lift or a mobile lift. The lifting aid must be attached to the circulation fan,

JN so the lifting aid is brought right to the fan with a crane

S 25 closed. The above is a common way of carrying out the lifting of circulating air fans in industry, and the lifting aids are self-made or manufactured.

N z © In practice, this often results in the fact that the structure of the pulp dryer

S 30 roads must be unloaded out of the way of the lifting aid in order to

N auxiliary device can be attached to the fan. In particular, the

With Nella, the lifting aid can be attached to only a few circulating air fans, so that there is no need to dismantle the treatment platform, ducts, steam pipe or pipes of central vacuum cleaners from the front.

For example, if a fan close to the floor of the hall is to be removed, all the treatment levels above, the stairs and the duct section must be dismantled from the front for replacement and later put back together. This is a very big job compared to removing the fan.

On the other hand, the pulp dryer is often placed in such a way that there is no significant free space on its sides, which partly makes it difficult to remove the fan.

The purpose of the invention is to provide a lifting aid for the blower of a pulp dryer and a method for moving the fan with the aid of a lifting aid, which make it possible to remove and move the fan easier than state-of-the-art auxiliary devices and methods. The characteristic features of the invention regarding the auxiliary device can be seen from the attached patent claim 1 and regarding the method from patent claim 13.

The purpose of the lifting aid according to the invention is achieved with a lifting aid for the blower of the pulp dryer, in which the lifting aid includes a lifting device for attaching the lifting aid to the fan to be lifted, the first fastening means for locking the lifting device to the fan during lifting, o a cable including the first end and the second end, and a sled

S 25 fitted to a cable to move the fan with the cable while the so-called lifting member is suspended on the sled. In addition, the lifting or auxiliary device includes a support device connected to a cable for lifting

I to hang the auxiliary device on the second fan so that

The N conductor is supported to be substantially horizontal with the help of support means 3 30.

A

S

N In this context, when we talk about removing the fan, we mean the removal of the fan part of the circulating air fan from the wiring harness, which remains in place in the pulp dryer.

With the aid of a lifting aid according to the invention, removing the fan from the pulp dryer can be performed much faster and easier than lifting aids according to the state of the art, because the use of the lifting aid according to the invention requires considerably less dismantling of maintenance bridges or other structures of the pulp dryer before removing the fan. This is achieved by using a cable for the transfer and a sled that can be moved on their support, on which the removable fan is hung. With the help of the sled, the fan can be moved out of the pulp dryer past the service bridges, so that the final lifting can be done, for example, with a bridge crane or using the own winch of the lifting aid.

Advantageously, the lifting aid also includes a support member fitted to the first end of the cord to preferably support the cord to the upper, second fan. With the help of the support element, the lifting aid can be attached to the second fan in at least two places, which guarantees a sturdy attachment.

According to one application form, the lifting aid includes quick-fastening means, preferably bolt fasteners, for releasably attaching the lifting member, the support means and the conductor to each other. In this way, the lifting aid can be carried by hand in parts of the treatment

S 25 to the bridge, and assemble there before use. In this case, the lifting aid 2 does not need to be lifted with a crane, which would require the dismantling of maintenance bridges and railings. i

Advantageously, the cable includes a removable movement limiter at one end. The motion limiter is removable so that the sled

N can be disconnected from the cable during the transfer of the lifting aid.

N The purpose of the motion limiter is to prevent the sled from falling off the line when lifting the fan and moving it outside the service bridge.

The lifting member preferably includes a vertical arm comprising two ends, one end of which is connected to the carriage, and a lifting support connected to the vertical arm and another lifting support connected to the other end of the vertical arm for attaching the lifting member to the fan. In this way, the fan is connected to the carriage by means of a lifting device. The second lifting support forms a horizontal support for the fan in the lifting situation, which is supported by the lifting support on the side of the fan.

Advantageously, the lifting support is a lifting beam. A suitable perforation can be formed in the lifting beam for the first fastening means.

Preferably, between the carriage and the vertical arm is a joint equipped with a rotation axis perpendicular to the guide, making it possible to turn the vertical arm around its longitudinal axis at least partially. The joint can be used to reduce the required length of the cable to move the fan to the outside of the service bridge. The fan attaches to the lifting aid on one edge, and the fan has a length parallel to the cable. Because of this, if the joint were not used, the cable would have to continue clearly to the edge of the service bridge further to move the fan completely past the service bridge. With the help of a joint, the sled

The S 25 can be moved past the maintenance bridge with a cable, and then the vertical arm 2 and the fan o attached to it by means of a support member can be turned 180 degrees in relation to the vertical axis, so that the

The entire length of the I holder moves outside the service bridge. Maintenance

N outside the bridge, the final lifting can be carried out pre-

S 30 as a mark using a bridge crane.

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N According to one application form, the lifting aid can include a winch that can be detachably attached to the other end of the cable, with which the fan can be lowered to the floor with the lifting support.

In this case, the replacement work can be done completely without a separate bridge crane.

Preferably, the support means is fitted at an angle relative to the longitudinal direction of the conductor 5 and the support means is telescopic, comprising at least two parts that are at least partially nested in relation to each other to support the conductor essentially horizontally. With the help of a telescopic support device, the length of the support device can be adjusted to suit also the disconnection of fans at different distances from each other, so that the line is always essentially horizontal. The position of the cord may differ slightly from being completely horizontal, but the basic principle is that the slide and fan could be moved even by pushing by hand.

Alternatively, the sled can include an electric motor to drive the sled to the wire.

Preferably, the length of the sled is 10 to 50 cm, preferably 15 to 25 cm, so that the wheels preferably belonging to the sled are located at a sufficient distance from the joint connecting the vertical arm to the sled.

The center of gravity of the fan is located at a distance from the attachment of the fan to the lifting member, which tends to turn the fan and the lifting member in relation to the slide. Sufficient length of the sled is important,

S 25 so that the slide does not apply a very point-like load 2 to the wire due to the torque caused by the fan, but the load o is distributed over a wider area of the wire.

E

According to one form of application, at least the support means, and preferably also the second support member, includes shape-locked bi-

N set means of attachment to the support means, and preferably also to another

N for attaching the support member around the edge belonging to the fan. With the help of form-locking second fastening means, the fastening of the support means and preferably also the second support member from the liftable fan to the upper fan takes place quickly and reliably. Form-locked second fastening means can be, for example, hook-shaped members.

Form-locked second fastening means can be claw-like locking elements.

Advantageously, other fastening means also include bolt fastenings for locking. With the help of bolt fastenings, form-locking second fastening devices can be firmly and securely locked to the fan in all directions of movement.

This ensures the safety of the transfer.

Advantageously, the lifting member, support member and support means are a steel pipe or profile. In this way, the parts of the lifting aid as individual parts are reasonably light and can be lifted and transported by the user to the place of use. On the other hand, the profile and pipe structures are also strong and rigid enough to withstand the transfer of a fan weighing less than a ton.

Preferably, the length of the cable is 0.5 to 1.0 m greater than the width of the service bridges. According to one form of application, the cable can be 1.0 to 2.0 m in length, preferably 1.3 to 1.7 m. In this case, the cable o is long enough so that the sled and the

The S 25 fan can be moved outside the service bridges. 3 o The support device can be attached to the conductor at a point whose remote

I fall from one end of the conductor is 0 to 30%, preferably 5 to 15% * of the length of the conductor. In this case, the support means provides reliable 3 30 support for the line, and the fan cannot move with the line

N significant fulcrum created by the fulcrum for the conductor

N over.

Preferably, the conductor consists of two side-by-side and separate rails that are attached to each other. This lightens the structure of the conductor.

The purpose of the method according to the invention is achieved by a method for moving the pulp dryer fan from the pulp dryer as a lifting aid, which method includes the following steps, in which the railing of the pulp dryer service bridge or a part of the service bridge is removed, the lifting aid is brought into connection with the fan, the lifting aid preferably is hung from the second fan above and the cable belonging to the lifting aid is supported to the second fan to be essentially horizontal.

Further in the method, the lifting aid is attached to the fan, the fan is detached from the pulp dryer and the fan is moved horizontally with the help of a sled with a cable out of the pulp dryer outside the service bridge with the fan suspended on the sled.

In the method according to the invention, instead of all the structures above, only one upper part of the service bridge is removed, when the fan can be moved outside the service bridge with the help of the sled and cable of the lifting aid to lower it or lift it up. In this way, the transfer can be done quickly and effortlessly. This is particularly important, because in the pulp dryer, the number of fans

The quantity of S 25 can be between 100 and 300 pieces. 3 o Advantageously, the lifting aid is brought as separate parts of the fan

I, and before hanging, the lifting aid is assembled from parts. * In this way, to lift the lifting aid itself to the place of use 3 30, for example, a bridge crane is not needed, but the lifting aid can be transported

N back to the destination by hand and assemble ready for use.

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According to one application form, the fan is lifted with the aid of a lifting aid after the lifting aid has been attached to the fan and disconnected from the pulp dryer, but before the fan is moved with the aid of the lifting aid.

According to one form of application, the fan is turned by means of a lifting member in relation to the slide by 90° to 270°, preferably 160°. - 200° ni- Swing around when the slide reaches the other end of the wire. In this way, the cable can be slightly shorter when the structure of the fan can be turned around the joint to the other side, in which case the entire fan is outside the service bridges.

With the lifting aid device and method according to the invention, the fan can be removed and replaced without a crane, wherever it meets the pulp dryer. In addition, the fan can be removed and replaced so that there is no need to dismantle treatment levels, ducts, steam pipes, suction pipes, electric cables of the fan and stairs. Changing the fan speeds up significantly, especially in those applications where there are a lot of the above-mentioned structures that prevent it from being changed. As a result of the above-mentioned advantages, occupational safety and user-friendliness improve and the fan is easier to maintain or replace.

The invention, which is not limited to the application forms presented below, is explained in more detail by referring to the accompanying figures, in which

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2 25 2 Figure 1 shows axonometric view of the pulp dryer from the side,

I Figure 2a shows the lifting aid according to the invention, depicted axonometrically separately,

O

N Figure 2b shows a lifting aid according to the invention

Viewed from the side,

Figure 2c shows the lifting aid according to the invention, viewed from the front,

Figure 3a shows the attachment of the lifting aid according to the invention to the fan, viewed from the side,

Figure 3b shows the attachment of the lifting aid device according to the invention to the fan, depicted axonometrically,

Figure 4a - 4c shows, viewed from the side, the phases of moving the fan,

Figure 5 shows the cross-section of the conductor and the carriage,

Figure 6 shows the steps of the method according to the invention as a block diagram.

The illustrations refer to the different parts of the invention using the following reference numbers 10 lifting aid 35 40 one end of the vertical arm 12 fan 42 joint 13 second fan 44 telescope part 14 lifting tool 46 second fastening means 16 first fastening means 40 47 upper edge 18 guide 49 lower edge o 20 first end 50 bolt fastenings

S 25 22 other end 52 — maintenance bridge 2 24 sled 54 maintenance bridge railing o 26 support member 45 56 fan tower

I 28 support device 60 lifting support * 30 quick fastening devices 62 second lifting support 3 30 32 bolt fasteners 64 support part

N 34 movement limiter 66 stem

N 36 vertical arm 50 68 bolt 38 vertical arm first 70 shaft end 72 joint sleeve

73 claw-like arms 81 adjustment bolt 74 support triangle 82 wheels 76 locking bolts 83 support iron 78 rail 84 sled frame. 80 intermediate support

Figure 1 shows the pulp dryer 100 viewed from the side.

Pulp dryer 100 includes a large number, usually 100 to 300 pieces of fans 12, which are attached to fan towers 56, which are parallel. The individual fan tower 56 has several fans 12 stacked on top of each other, the fans being substantially similar in structure. In order to maintain the fans 12 and the pulp dryer 100 in general, there are maintenance bridges 52 on the sides of the pulp dryer 100, which prevent the fan 12 from being lifted directly from the pulp dryer 100 with a bridge crane.

Figures 2a to 2c show a preferred embodiment of the lifting aid 10 according to the invention. The lifting aid device 10 basically comprises a lifting member 14 that can be releasably attached to each other, the first fastening means 16 for attaching the support member 14 to the fan 12 according to figures 3a and 3b, a line 18 and a slide 24 that can be adapted to these, and a support member 26 and a support means 28 for supporting the line 18 of the movable fan 12 - o to the second fan 13 on the top of the picture 3a and 3b mu-

In a way. In the application forms of Figures 2a - 5, the conductor 18 consists of 2 30 two separate rails 78 (Figure 5), but it should be understood that the conductor can also be a single downwardly opening

I C-shaped, elongated structure. The support means 28 is advantageous

Usually the support arm shown in the pictures, but alternatively the support arm

Wire, chain, rope or something similar can also be used as S line. &

The above-mentioned parts are attached to each other by means of quick fastening means 30, which are preferably bolt fasteners 32.

In practice, the parts of the lifting aid are carried in connection with the mobile fan using service bridges or pulled, for example, by a small cart that can be lifted with a bridge crane onto the service bridge in the end area of the pulp dryer. The lifting aid is assembled ready for use in connection with the fan. In order to make it possible to carry it ergonomically, the parts in question are advantageously made of steel pipes or profiles, in which case the weight of an individual part is a maximum of 20 kg. Pipe or profile structures are rigid in relation to their weight and are therefore suitable for their purpose.

The lifting member 14 preferably includes, according to Figures 2a - 2c, a vertical arm 36, which is attached from its first end 38 to the carriage 24, and a lifting support 60 adapted to the connection of the first end 38 of the vertical arm 36 and a second lifting support 62 adapted to the connection of the second end 40 of the vertical arm 36 for attaching the fan 12 to the lifting member 14. The lifting support 60 is preferably a lifting beam, which is preferably a hollow or lightened steel tube or profile with a width of 50-80% of the width of the fan 12. The fastening of the lifting beam to the fan 12 takes place according to figure 3b through the openings formed in the fan 12 using the first fastening means 16, which are preferably bolt fasteners. In order for the structure of the fan 12 with respect to the openings o to withstand the load caused by the mass of the fan

S 25 during its lifting, it is preferable to use pallet trucks or the like on the rear side for fastening, through which the first o fastening means extend. Flat irons or similar will divide

I load to a larger area on the edge of the fan. a 00

S 30 According to Figure 3b, the second lifting support 62 can be, for example

N steel profile that supports the vertical support 36 against the fan and

N accepts the load acting eccentrically with respect to the suspension point of the lifting support 14. Preferably, the second lifting support comprises a support part 64 in the width direction of the fan and a stem 66 equipped with threads that is attached transversely to this.

Counter-threads can be fitted inside the stem 66 and the support part 64 is connected to the stem 66 by means of a bolt 68. In this way, the distance of the support part 64 in relation to the vertical arm 36 can be adjusted by turning the bolt 68. With this adjustment, the position of the fan attached to the lifting support 14 can be changed.

Preferably, between the first end 38 of the vertical arm 36 and the carriage 24, a joint 42 with an axis perpendicular to the conductor is formed, which enables the lifting support 14 to be turned relative to the carriage 24. Preferably, the joint 42 is formed, as shown in Figure 5, by a shaft 70, to which the vertical arm 36 is attached, and a joint sleeve 72, which inside there are bearings for locking the shaft 70 in the joint sleeve 72 and enabling their mutual rotation. Preferably, the joint sleeve 72 is welded to the carriage 24 with the help of support triangles 74, whereby the loads applied to the joint 42 are evenly distributed among the structures of the carriage 24.

The support means 28, with the help of which the guide 18 and the slide 24 fitted to them are preferably hung from the movable fan 12 to the second fan 13 above, according to figures 3a and 3b, is preferably telescopic, consisting of two partially or nested parts of the telescope 44.

In order to connect S 25 to each other in the operating position, the parts 44 can include 2 sets of holes through which a locking pin is fitted after the right dimension of the support means has been found. Determining the right size

The position of the conductor, which must be substantially horizontal

N nen. The support means 28 is preferably attached to the liftable fan

S 30 lint 12 to the upper edge 47 of the second fan 13 above

N according to figure 3a and 3b.

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A support member 26 is connected to the first end 20 of the conductor 18, which can be a support beam that rests against the fan,

preferably in connection with the lower edge 49 of the second fan 13 above the liftable fan 12, as shown in figure 3b. Alternatively, if necessary, the support element can be attached, for example, from the side of the fan, or it can also be hung from the upper edge of the fan with the help of rods. Preferably, both the support means 28 and the support member 26 include form-locked second fastening means 46, where the form-locking can be implemented by means of claw-like arms 73 extending around the edge of the fan, preferably the upper or lower edge 47, 49. Preferably, the form-locking second fastening means 46 also include locking bolts 76, which press the edge 47,49 of the second fan 13 tightly against the second fastening means 46.

A movement limiter 34, which can be seen in figure 2a, is preferably attached to the other end 22 of the conductor 18. One purpose of the motion limiter 34 is to prevent the sled 24 placed on the conductor 18 from falling off the conductor 18, but on the other hand, it also enables the sled to be installed on the conductor in connection with assembling the lifting aid from the end of the conductor 18. Furthermore, the purpose of the motion limiter is to connect the two rails 78 according to figure 5, which preferably belong to the conductor 18 and are spaced apart from each other, into conductors 18 at their other end 22. At the first end of the conductor 18, the support member 26 performs the same o function. In this embodiment, the ends 20 and 22 of the conductor 18

In addition to S 25, the conductor 18 preferably also includes at least one 2 intermediate support 80, which binds the parallel rails 78 at a constant distance from each other. Preferably, the intermediate supports 80 are shown in Fig. 2a

I think at least two songs. The intermediate support can be so sa-

N kitty c-clamp holder plate. 3 30 ©

N Preferably, the rails 78 have a cross-sectional shape like this

N said C-rails according to figure 5, where the wheels 82 preferably belong to the carriage 24, are placed inside the C-shape of the rail 78, where they can only move in the longitudinal direction of the conductor 18, the C-shape preventing lateral movement. In this way, the carriage 24 efficiently transmits the forces directed at it from the mass of the fan via the wheels 82 to the conductor 18 and through it further to the support means 28 and the support member 26 and further to the upper second fan 13.

The sled 24 includes a frame 84, to which wheels 82 are preferably attached at the corners, and between them a so-called joint 42 is attached. Preferably, the axis 70 of the joint 42 includes an adjustment option, with which by rotating the axis 70, the vertical arm 36 can be adjusted in the vertical direction by 5 to 100 mm, preferably 20 - 40 mm. For rotation, the shaft may include an adjustment bolt 81 piercing the frame 84 of the sled 24. The frame 84 of the sled 24 may also include a support iron 83, which is fitted on top of the frame 84 to strengthen the frame 84.

The length of the cord of the lifting aid according to the invention can be 1.0 - 2.0 m, preferably 1.3 - 1.8 m, and the height of the entire lifting aid from the second fastening means of the support device 28 to the lower end of the vertical arm of the lifting member 2 - 4 m, preferably 2.5 - 3, 5 m.

The width of the lifting support, on the other hand, can be 1 - 2 m, preferably 1.4 - 1.7 m. The length of the sled in the longitudinal direction of the cable can be 10 - cm, preferably 20 - 30 cm. For example, standards EN 10025-2 or EN can be used as material o for the lifting aid

Materials according to S 25 10149-2, with yield strength Re/Rpo,2 has 2 levels 300 - 800 Mpa, breaking strength Rm 400 - 1000 Mpa and tensile strength A 10 — 25%. Advantageously, the lifting aid can be made lighter

I lightening openings, such as, for example, the vertical support 36 has a light-

N netty in figure 3b. The other one can also have a similar relief

S 30 in the support member and lifting support. The weight of the lifting fan is

N generally less than 1000 kg, while the lifting aid may be less

About 200 kg.

Figure 6 shows the steps of the method according to the invention as a block diagram in one embodiment. The lifting aid is preferably installed on the fan above the replaceable fan or, in the case of the uppermost fan, on the wall element. In order to remove the fan, it is preferable to remove the cover and wool between the fans, so that the top and bottom edges of the fan are exposed for use by other fastening devices. In step 200, the wire and the support means are attached to the upper fan lugs with ball-locking pins, which advantageously form the other fastening means, and are tightened with the bolts of the bolt fasteners against the wall of the upper fan as shown in Figure 3a. In step 202, the support means is locked to the conductor and the long fastening hole that preferably belongs to it allows the conductor to be adjusted horizontally before tightening.

When attached to the wall element, the support device is adjusted to the longer position of its telescopic parts and can be locked with the two cotter pins that come with the lifting aid.

In step 204, the carriage is fitted to the conductor by turning the motion limiter out of the way of the carriage, so that the carriage and intermediate support are fitted to the conductor. In step 206, the motion limiter is tightened back closed during the exchange, for example with bolts.

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S 25 In step 206, the lifting member is attached to the holes on the sides of the replaceable fan 2 with, for example, bolts and the fixing plates that come with the support member belonging to the lifting member o. Supreme

I when changing the fan, the fan can be attached to the support

N from the upper holes of the end plate, but in other

S 30 in paus from the lower holes of the end plate. In step 208, support

N lin can be attached to the vertical arm of the lifting device with a ball lock-

N on the pin.

In step 210, the vertical position of the lifting member can be adjusted from the bolt above the carriage. The position of the fan can be adjusted with the bolt on the second support member of the vertical arm.

When the lifting aid is firmly attached to the removable fan and supported on the upper fan, the removable fan can be detached from the part of the fan that remains in the pulp dryer for lifting.

When the lifting aid and the lifting device are attached to the fan to be moved in accordance with steps 200 - 210, the replaceable fan 12 can be removed from the pulp dryer to support the replacement device in accordance with steps 212 - 218 and with reference to figures 4a - 4c.

In step 212, the height of the lifting member, i.e. the vertical position, is adjusted from the screw above the carriage 24 and the fan 12 is taken to the support of the lifting auxiliary device 10. If necessary, the position of the fan 12 is adjusted in step 214 by adjusting the second lifting support 62 with the screw. In step 216, the fan 12 in the support of the lifting aid 10 is moved using the carriage 24 from the position according to figure 4a from the first end 20 of the conductor 18 to the second end 22 according to figures 4a and 4b. In step 220, the fan 12 is rotated 180° around the joint 42 of the lifting member 14 o within the reach of the roof lifter according to figure 4c. In step 222

With the S 25 ceiling lifter, the center of gravity of the fan is grasped, after which 2 the lifting aid can be detached from the fan in step o 224. The carriage may include a separate lifting eye, from which

The portable fan can be attached to a ceiling crane. The new pu-

N halls can be installed by repeating steps 200 to 224 in reverse

S 30 in another order.

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N If the removable fan is the top fan of the fan tower, for the use of the lifting aid device, separate lifting supports can be formed in the fan tower, which are used to support the lifting aid device.

Alternatively, instead of the upper second fan, it can be thought that there are two support means that support the lifting aid device to the fans on the sides of the fan or to the fans on the top slope. 0

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Claims (15)

PATENT CLAIMS 1. Lifting aid device (10) for the fan (12) of the pulp dryer (100), in which the lifting aid device (10) includes - a lifting device (14) for attaching the lifting aid device (10) to the fan (12) to be lifted, and - first fastening means (16) for locking the lifting device (14) to the fan (12) during lifting, characterized in that the lifting aid (10) also includes - a line (18) comprising a first end (20) and a second end (22), - a slide (24) adapted to the line (18) for moving the fan (12) with the said lifting member (14) being suspended from the said carriage (24) by means of a line (18), - the support means (28) connected to the said line (18) for hanging the lifting auxiliary device (10) to the second fan (13) so that the said line (18) is supported by means of a support means (28) said to be essentially horizontal. 2. The lifting aid according to claim 1, known for the fact that the lifting aid (10) also includes a support Kiel (26) fitted to the first end (20) of the conductor (18) to preferably support the conductor (18) to the upper, second fan (13) . OF = 3. The lifting aid according to claim 1 or 2, characterized in that the lifting aid (10) includes quick-I attachment means (30), preferably bolt fasteners (32), the so-called lifting member (14), a support means (28) and a conductor ( 18) for releasably attaching 3 30 to each other. OF N 4. A lifting aid device according to one of claims 1 to 3, characterized in that said cable (18) includes a removable movement limiter (34) at one end (22). 5. The lifting aid device according to one of claims 1 to 4, characterized in that the lifting member (14) includes - a vertical arm (36) comprising two ends (38,40), one end (38) of which is connected to the carriage (24), - a lifting support (60) connected to the vertical arm (36) for fixing the lifting member (14) to the fan (12), and - another lifting support (62) connected to the other end of the vertical arm (36) (40) for fixing the lifting member (14) to the fan (12). 6. The lifting aid according to claim 5, known for the fact that between the said carriage (24) and the vertical arm (36) there is a joint (42) equipped with a rotation axis perpendicular to the guide (18), enabling the vertical arm (36) to be turned around its longitudinal axis at least partly. 7. A lifting aid device according to one of claims 1 to 6, characterized in that said support means (28) is arranged at an angle relative to the longitudinal direction of the conductor (18) and the support means (28) is telescopic, comprising at least two at least partially nested in relation to each other adapted part (44) to support said conductor (18) substantially horizontally. OF = 8. A lifting aid device according to one of claims 2 to 7, characterized in that at least the support means (28), and I preferably also the support member (26), includes form-locked > second fastening means (46) of the support means (28), and preferably 30 also for attaching the support member (26) around the edge (47,49) belonging to the second fan (13). OF 9. The lifting aid according to claim 8, known for the fact that the other fastening means (46) also include bolt fastenings (50) for locking. 10. A lifting aid device according to one of claims 2 to 9, characterized in that said lifting body (14), support member (26) and support means (28) are a steel pipe or profile. 11. A lifting aid device according to one of claims 1 to 10, characterized in that said support means (28) is attached to the conductor (18) at a point whose distance from the other end (22) of the conductor (18) is 0 to 30%, preferably 5 to 15% of the length of the conductor (18). 12. Lifting aid according to one of claims 1 to 11, characterized in that the guide (18) consists of two adjacent and separate rails (78) which are attached to each other. 13. A method for moving the fan (12) of the pulp dryer (100) from the pulp dryer (100) with the aid of a lifting aid (10), which method includes the following steps: a) removing the railing (54) of the service bridge (52) of the pulp dryer (100) or part of the service bridge ( 52), S 25 b) bring the lifting aid (10) to the fan (12), 2 c) attach the lifting aid (10) to the fan (12), o d) remove the fan (12) from the pulp dryer (100), I e) move the fan (12) ) essentially horizontally away from the pulp dryer (100) with the fan (12) suspended from the lifting aid (10), characterized by the fact that before step c) N - the lifting aid (10) is suspended, preferably from the second fan above ( 13), - the wire (18) belonging to the lifting aid (10) to the second fan (13) is supported so that it is essentially horizontal, and in step e) the fan (12) is moved with the help of the sled (24) with the wire (18) to move the fan (12) horizontally outside the service bridge (52). 14. The method according to claim 13, characterized in that in step b) the lifting aid (10) is brought as separate parts to the fan (12), and before hanging the lifting aid (10) is assembled from the parts. 15. The method according to claim 13 or 14, characterized in that the fan (12) is lifted using the lifting aid (10) after step d) before step e). N N O N N N I Jam a 00 O O O N N O N