Lifting fitting and method for transferring pulp dryer by means of a fan of a pulp dryer

Abstract

The invention relates to a lifting assembly for a fan of a pulp dryer, the lifting assembly comprising a lifting element for fastening the lifting assembly to a fan to be lifted, and first fastening means for locking the lifting element to the fan during lifting, a guide rail comprising a first end and a second end, a carriage adapted to the guide rail for transporting the fan on the guide rail while the lifting element is suspended from the carriage, support means connected to the guide rail for suspending the lifting assembly from a second fan, such that the guide rail is supported in a substantially horizontal direction by the support means. The invention also relates to a method for transporting a fan of a pulp dryer from a pulp dryer by means of a lifting assembly.

Description

Technical Field

[0001] This invention relates to a lifting accessory for a blower of a pulp dryer, the lifting accessory comprising:

[0002] - Lifting elements, used to secure lifting accessories to the fan to be lifted, and

[0003] - First fastening device for locking the lifting element to the fan during lifting.

[0004] The present invention also relates to a method for conveying a blower from a pulp dryer to a pulp dryer by means of lifting accessories. Background Technology

[0005] Pulp drying in a pulp dryer utilizes numerous circulating fans. The circulating fans in a pulp dryer consist of a fan section (impeller, body, and motor) and guide vanes. The circulating fans are located in a fan tower stacked within the pulp dryer. If it is necessary to replace the impeller or motor of the circulating fan (hereinafter referred to as the fan), the fan section must be completely removed from the pulp dryer and guide vanes. Disassembly is carried out using lifting fittings specifically manufactured for this purpose, which are secured to an overhead crane, I-beam crane, or mobile crane. The lifting fittings must be secured to the circulating fans, which is why they come into contact with the fans via the crane.

[0006] In practice, this typically results in the slurry dryer structure having to be dismantled to make way for the lifting fittings, allowing them to contact the blowers. Specifically, on the drive side, the lifting fittings can only be secured to a few circulating blowers, thus eliminating the need to dismantle service platforms, piping, steam pipes, or central vacuum cleaning system piping to make way for them. As an example, if a blower near the facility floor needs to be removed, all overhead service platforms, stairs, and piping components must first be removed for replacement before being reinstalled in place. This is a significantly larger undertaking than the removal of the blowers themselves.

[0007] On the other hand, pulp dryers are often placed in locations where there is not much available space on their sides, which makes it more difficult to remove the blower. Summary of the Invention

[0008] The purpose of this invention is to provide a lifting accessory for a blower in a pulp dryer and a method for conveying the blower via this lifting accessory, which, compared to prior art accessories and methods, allows for easier removal and conveying of the blower. The features of the accessory and method of this invention can be more fully understood from this specification.

[0009] The purpose of the lifting accessory according to the invention will be achieved by a lifting accessory for a blower in a slurry dryer, the lifting accessory comprising a lifting element for fastening the lifting accessory to the blower to be lifted, a first fastening device for locking the lifting element to the blower during lifting, a guide rail including a first end and a second end, and a bracket adapted to transport the blower on the guide rail while the lifting element is suspended on the bracket. Furthermore, the lifting accessory includes a support device connected to the guide rail for suspending the lifting accessory on a second blower, such that the guide rail is supported in a substantially horizontal direction by the support device.

[0010] In this context, when referring to the removal of the fan, it means removing the fan section of the circulating fan from the guide vanes that remain in place in the slurry dryer.

[0011] According to the lifting fitting of the invention, the blower can be removed from the pulp dryer more quickly and easily than in the prior art because, using the lifting fitting according to the invention, it is rarely necessary to disassemble the service platform or other structures of the pulp dryer before removing the blower. This can be achieved by using guide rails and movable brackets on the guide rails during transport, with the blower to be removed suspended on the brackets. The blower can be transported from the pulp dryer outwards across the service platform via the brackets, and thus ultimately lifted, for example, by an overhead crane or a winch of the lifting fitting.

[0012] The lifting fitting advantageously also includes a support element that adapts to the first end of the guide rail to advantageously support the guide rail to another fan above. The support element allows the lifting fitting to be secured to the other fan from at least two points, ensuring a secure fastening.

[0013] According to one embodiment, the lifting assembly includes a quick-fastening device, advantageously bolt fasteners, for detachably securing the lifting element, support device, and guide rail to each other. In this way, the lifting assembly can be manually transported to the service platform in multiple parts and assembled there before use. This eliminates the need for a crane to lift the lifting assembly, which would require dismantling the service platform and railings.

[0014] The guide rail advantageously includes a removable travel stop at one end. The travel stop is removable to allow the bracket to be removed from the guide rail during lifting and conveying of the accessory. The travel stop prevents the bracket from falling off the guide rail as the fan is lifted and conveyed outside the service platform.

[0015] The lifting element advantageously includes a vertical arm with two ends. One end of the vertical arm is connected to a bracket, a lifting support is connected to the vertical arm, and a second lifting support is connected to the other end of the vertical arm for securing the lifting element to the fan. In this way, the fan is connected to the bracket via the lifting element. During lifting, the second lifting support forms a horizontal support for the fan, which is supported to the side of the fan by the lifting support.

[0016] Advantageously, the lifting support is a lifting beam. Suitable perforations can be formed in the lifting beam used for the first fastening device.

[0017] Advantageously, a joint is provided between the bracket and the vertical arm, having a rotation axis perpendicular to the guide rail, allowing the vertical arm to rotate at least partially about its longitudinal axis. This joint reduces the length of the guide rail required to move the fan outside the service platform. The fan is attached to the lifting assembly from one edge and has length in the direction of the guide rail. Therefore, without the joint, the guide rail would have to extend beyond the edge of the service platform to move the fan completely outside. With the joint, the bracket can be moved across the service platform along the guide rail, and thereafter, the vertical arm and the fan, fastened thereto by support elements, can rotate 180 degrees relative to the vertical axis, thereby moving the entire length of the fan outside the service platform. For example, the final lifting can be performed outside the service platform using an overhead crane.

[0018] According to one embodiment, the lifting assembly may include a winch detachably attached to one end of a guide rail, through which the fan can be lowered to the floor along with the lifting support. In this configuration, replacement work can be carried out entirely without the use of a separate overhead crane.

[0019] The support device is advantageously adapted at an angle relative to the longitudinal direction of the guide rail, and is telescopic, comprising at least two components, which are at least partially internal to each other, to support the guide rail in a substantially horizontal direction. With the telescopic support device, the length of the support device can be adapted to accommodate the removal of fans at varying distances from each other, ensuring that the guide rail is always substantially horizontal. The position of the guide rail may differ slightly from the horizontal direction, but the basic principle is that the bracket and fan can be moved even by hand.

[0020] Alternatively, the bracket may include an electric motor for driving the bracket to the guide rail.

[0021] The bracket length is advantageously 10-50 cm, advantageously 15-25 cm, thus advantageously including the wheels in the bracket at a sufficient distance from the joint connecting the vertical arm to the bracket. The fan's center of gravity is located at a certain distance from the fastening of the fan and the lifting element, which causes the fan and lifting element to rotate relative to the bracket. It is important that the bracket has sufficient length so that it does not apply a very point-like load to the guide rail due to the torque generated by the fan, but rather distributes the load over a wider area of ​​the guide rail.

[0022] According to one embodiment, at least the support device, advantageously also includes a second support element, comprising a shape-locking second fastening device for securing the support device around an edge belonging to the fan, and advantageously also includes a first support element. By means of the shape-locking second fastening device, the support device and the advantageous second support element can be quickly and reliably secured to the fan directly above the fan to be lifted. The shape-locking second fastening device can be, for example, a hook-shaped element.

[0023] The second fastening device for shape locking can be a claw-shaped locking element.

[0024] The second fastening device advantageously also includes bolt fasteners for locking. With the bolt fasteners, the shape-locking second fastening device can be securely and reliably locked into contact with the fan in all directions of movement. This ensures the safety of the transmission.

[0025] The lifting elements, support elements, and support devices are advantageously made of steel pipes or steel profiles. In this way, the components of the lifting fitting, as individual parts, have a relatively light weight and can be lifted and transported by the user to the place of use. On the other hand, the profile and pipe structure is also strong and rigid enough to withstand the transmission of a fan weighing less than one ton.

[0026] The length of the guide rail is advantageously 0.5-1.0m greater than the width of the service platform. According to one embodiment, the length of the guide rail can be 1.0–2.0m, advantageously 1.3-1.7m. In this case, the guide rail is long enough that the bracket and the fan suspended from it can be moved to the outside of the service platform.

[0027] The support device can be fastened to the guide rail at a point 0-30% of the guide rail length, advantageously 5-15%, from the other end of the guide rail. In this case, the support device provides reliable support for the guide rail, and the fan cannot move significantly on the guide rail beyond the support point created by the support device for the guide rail.

[0028] The guide rail is advantageously composed of two adjacent and separate tracks that are fastened together. This makes the guide rail structure lighter.

[0029] The object of the method according to the invention is achieved by a method of conveying a blower of a pulp dryer from a pulp dryer via a lifting accessory. This method includes the steps of removing a railing or part of the service platform of the pulp dryer, lifting the lifting accessory to the blower, advantageously suspending the lifting accessory above a second blower, and supporting a guide rail belonging to the lifting accessory substantially horizontally to the second blower. Furthermore, in this method, the lifting accessory is secured to the blower, the blower is removed from the pulp dryer, and the blower is horizontally conveyed outside the pulp dryer outside the service platform via a bracket on the guide rail, while the blower is suspended from the bracket.

[0030] In the method according to the invention, when the blower can be conveyed to the outside of the service platform via the brackets and guide rails of the lifting fitting for lowering or raising, only one upper part of the service platform needs to be removed, rather than all of the top-mounted structure. In this way, conveying can be done quickly and easily. This is particularly important because the number of blowers in a pulp dryer can be between 100 and 300.

[0031] Advantageously, the lifting components are lifted to the wind turbine as separate parts, and are assembled from these parts before suspension. In this way, for example, there is no need for an overhead crane to lift the lifting components themselves to the point of use; instead, the lifting components can be manually transported to the point of use and assembled for use.

[0032] According to one embodiment, the fan is lifted by the lifting accessory after it has been secured to the fan and removed from the slurry dryer, but before it is conveyed to the guide rail of the lifting accessory.

[0033] According to one embodiment, when the bracket reaches one end of the guide rail, the fan rotates 90°–270°, advantageously 160°–200°, relative to the bracket around the joint via a lifting element. In this way, the guide rail can be slightly shorter so that the entire fan is located outside the service platform when the structure of the fan can be turned to the other side around the joint.

[0034] Using the lifting fittings and method according to the invention, the blower can be removed and replaced at any location on the slurry dryer without the use of a crane. Furthermore, the blower can be removed and replaced without dismantling service platforms, pipes, steam pipes, vacuum cleaner hoses, blower cables, or stairs. Blower replacement is much faster, especially in applications where there are many structures that hinder such replacement work. Due to these advantages, occupational safety and user-friendliness are improved, and the blower can be maintained or replaced more easily. Attached Figure Description

[0035] The present invention is not limited to the embodiments given below. The present invention will be described in more detail with reference to the accompanying drawings, in which:

[0036] Figure 1 The image shows an axonometric view of the pulp dryer, depicted from the side.

[0037] Figure 2a A separate isometric view depicting the lifting fitting according to the invention is shown.

[0038] Figure 2b The lifting accessory according to the invention is shown as depicted from the side.

[0039] Figure 2c The lifting accessory according to the invention is shown as depicted from the front.

[0040] Figure 3a The image shows the fastening of the lifting fitting to the fan according to the invention, as depicted from the side.

[0041] Figure 3b The image shows the fastening of the lifting fitting to the fan according to the invention, depicted in an isometric view.

[0042] Figures 4a to 4c The steps of the conveyor fan are shown as depicted from the side.

[0043] Figure 5 Cross-sectional views of the guide rail and bracket are shown.

[0044] Figure 6 The steps of the method according to the present invention are shown in block diagram form.

[0045] The accompanying drawings use the following reference numerals to refer to different parts of the invention:

[0046] 10 Upgraded Accessories

[0047] 12 fans

[0048] 13 Second Fan

[0049] 14 Lifting Components

[0050] 16 First fastening device

[0051] 18 guide rails

[0052] 20 First end

[0053] 22 Second end

[0054] 24 brackets

[0055] 26 Supporting elements

[0056] 28 Support device

[0057] 30 Quick-fastening device

[0058] 32 Bolt Fasteners

[0059] 34. Travel stop

[0060] 36 vertical arms

[0061] 38 The first end of the vertical arm

[0062] The second end of the 40 vertical arm

[0063] 42 connector

[0064] 44 Telescopic components

[0065] 46 Second fastening device

[0066] 47 Top edge (upper edge)

[0067] 49 Bottom edge

[0068] 50 Bolt Fasteners

[0069] 52 Service Platform

[0070] 54 Service Platform Railing

[0071] 56 Wind turbine towers

[0072] 60 Lifting Support Components

[0073] 62 Second lifting support component

[0074] 64 Support components

[0075] 66 arms

[0076] 68 bolts

[0077] 70 axis

[0078] 72 connector sleeve

[0079] 73 Claw Arm

[0080] 74 Support tripod

[0081] 76 Locking Bolts

[0082] 78 orbits

[0083] 80 intermediate support component

[0084] 81 Adjusting Bolt

[0085] 82 rounds

[0086] 83 Supporting iron parts

[0087] 84 Bracket Body Detailed Implementation

[0088] Figure 1 The pulp dryer 100 is shown as depicted from the side. The pulp dryer 100 comprises a large number, typically 100 to 300, blowers 12, which are secured to side-by-side blower towers 56. Each blower tower 56 contains several stacked blowers 12, which are structurally similar. To facilitate initial maintenance of the blowers 12 and the pulp dryer 100, a service platform 52 is provided on the side of the pulp dryer 100. This service platform 52 prevents the blowers 12 from being directly lifted out of the pulp dryer 100 by an overhead crane.

[0089] Figures 2a to 2c An advantageous embodiment of the lifting accessory 10 according to the invention is shown. The lifting accessory 10 includes the following basic components that are detachably fastened to each other: a lifting element 14, and a means for fastening the lifting element 14 to the fan 12 (according to...). Figure 3a and Figure 3b The first fastening device 16, the guide rail 18 and the bracket 24 adapted to the guide rail 18, and the support element 26 and support device 28 for supporting the guide rail 18 to the second fan 13, the second fan 13 being located above the fan 12 to be conveyed (according to...) Figure 3a and Figure 3b ).exist Figures 2a to 5 In this embodiment, the guide rail 18 consists of two separate rails 78. Figure 5 However, it should be understood that the guide rail can also be a single elongated structure with a downward opening in the shape of the letter C. The support device 28 is advantageously the support arm shown in the figure, but alternatively, cables, chains, ropes, or the like can also be used as the support device.

[0090] The aforementioned components are fastened together by quick-fastening devices 30, which advantageously consist of bolt fasteners 32. In practice, the components of the lifting accessory are brought to the fan to be transported by using a service platform or by pulling, for example, a small trolley. The components of the lifting accessory can be lifted to the service platform at the edge of the pulp dryer area by an overhead crane. The lifting accessory is assembled for connection with the fan. To make handling ergonomic, the components are preferably made of steel pipes or steel profiles, in which case the maximum weight of a single component is 20 kg. The pipe or profile structure is rigid relative to its weight and is therefore suitable for its intended use.

[0091] The lifting element 14 advantageously includes a vertical arm 36 (e.g., fastened to the bracket 24 via its first end 38) Figures 2a to 2c(as shown); and a lifting support 60 adapted to connect with the first end 38 of the vertical arm 36 and a second lifting support 62 adapted to connect with the second end 40 of the vertical arm 36, so as to secure the fan 12 to the lifting element 14. The lifting support 60 is advantageously a lifting beam, the width of which is advantageously 50-80% of the width of the fan 12, and is a hollow or lightweight steel pipe or profile. According to... Figure 3b The lifting beam is secured to the fan 12 using a first fastening device 16, advantageously a bolt fastener, through an opening formed in the fan 12. To enable the structure of the fan 12 with the opening to bear the load caused by its mass during lifting, it is advantageous to use flat iron bars or the like for rear-side fastening, through which the first fastening device extends. The flat iron bars or the like distribute the load over a larger area at the edge of the fan.

[0092] according to Figure 3b For example, the second lifting support 62 can be a steel profile that supports the vertical support 36 against the fan and bears loads eccentrically relative to the suspension point of the lifting support 14. The second lifting support advantageously includes a support member 64 in the lateral direction of the fan and a threaded arm 66 attached transversely to the support member 64. The reverse thread can be fitted inside the arm 66, and the support member 64 is connected to the arm 66 by bolts 68. Thus, the distance of the support member 64 relative to the vertical arm 36 can be adjusted by rotating the bolts 68. This adjustment allows the position of the fan fastened to the lifting support 14 to be changed.

[0093] A joint 42, having an axis perpendicular to the guide rail, is advantageously formed between the first end 38 of the vertical arm 36 and the bracket 24, which allows the lifting support 14 to rotate relative to the bracket 24. Figure 5 The joint 42 is advantageously formed by a shaft 70 and a joint sleeve 72, with a vertical arm 36 attached to the shaft 70. The joint sleeve contains a bearing for locking the shaft 70 to the joint sleeve 72 and allowing them to rotate relative to each other. The joint sleeve 72 is advantageously welded to the bracket 24 by a support tripod 74, thereby distributing the load applied to the joint 42 evenly across the structure of the bracket 24.

[0094] The support device 28 is advantageously telescopic, consisting of two telescopic components 44 that are partially internally fitted together. Through this support device 28, the guide rail 18 and the bracket 24 adapted thereon are advantageously suspended directly above the fan 12 to be conveyed, which is a second fan 13. To lock the components together in the operating position, the components 44 may include a series of holes through which locking pins are fitted after the correct dimensions of the support device have been determined. The correct dimensions are determined by the position of the guide rail, which must be substantially horizontal. Figure 3a and Figure 3b The support device 28 is advantageously secured to the upper edge 47 of the second fan 13 located directly above the fan 12 to be lifted.

[0095] The support element 26 is fastened to the first end 20 of the guide rail 18. This support element 26 may be a support beam. It is supported against the fan and advantageously fastened to the bottom edge 49 of the second fan 13 above the fan 12 to be lifted, as shown below. Figure 3b As shown. If necessary, the support element can alternatively be fastened from the side of the fan, for example, or also by a rod suspended from the upper edge of the fan. Both the support device 28 and the support element 26 advantageously include a shape-locking second fastening device 46, wherein the shape locking can be achieved by a claw arm 73 extending around the edge of the fan, advantageously around the upper edge 47 or the lower edge 49. Advantageously, the shape-locking second fastening device 46 also includes a locking bolt 76 that tightly abuts the edges 47, 49 of the second fan 13 against the second fastening device 46.

[0096] Figure 2a The travel stop 34 shown is detachably fastened to the second end 22 of the guide rail 18. One purpose of the travel stop 34 is to prevent the bracket 24 placed on the guide rail 18 from detaching from it; however, it also allows the bracket to be mounted on the guide rail from its end during the assembly of the lifting fitting. Another purpose of the travel stop is to... Figure 5 The two tracks 78 shown combine at one end 22 to form a guide rail 18. These two tracks 78 advantageously belong to the guide rail 18 and are spaced apart from each other. At the first end of the guide rail 18, a support element 26 performs the same function. In this embodiment, in addition to including the ends 20 and 22 of the guide rail 18, the guide rail 18 advantageously includes at least one intermediate support 80, which binds the parallel tracks 78 together at a constant distance. Figure 2a Advantageously, there are at least two intermediate support members 80. The intermediate support members can be so-called C-shaped clamp fixing plates.

[0097] Orbit 78 has the advantage of having, for example Figure 5The so-called C-shaped track cross-sectional shape shown has a wheel 82 advantageously included in the bracket 24, located inside the C-shape of the track 78, within which it can only move in the longitudinal direction of the guide rail 18, and the C-shape prevents lateral movement. In this way, the bracket 24 effectively transmits the force exerted on it by the mass of the fan to the guide rail 18 via the wheel 82, and further via the guide rail 18 to the support device 28 and support element 26, and further to the second fan 13 above.

[0098] The bracket 24 includes a body 84, wheels 82 advantageously secured to its corners, and a joint 42 attached between these corners. The shaft 70 of the joint 42 advantageously includes an adjustment option by which the vertical arm 36 can be adjusted vertically by 5-100 mm, advantageously 20-40 mm, by rotating the shaft 70. For rotation, the shaft may include an adjusting bolt 81 passing through the body 84 of the bracket 24. The body 84 of the bracket 24 may also include a support member 83 adapted to the top of the body 84 to reinforce it.

[0099] The length of the guide rail of the lifting accessory according to the invention can be 1.0-2.0m, advantageously 1.3-1.8m, and the height of the entire lifting accessory from the second fastening device of the support device 28 to the bottom end of the vertical arm of the lifting element is 2-4m, advantageously 2.5-3.5m. The width of the lifting support can be 1-2m, advantageously 1.4-1.7m. The length of the bracket in the longitudinal direction of the guide rail can be 10-50cm, advantageously 20-30cm. The material used in the lifting accessory can be, for example, a material conforming to standards EN 10025-2 or EN 10149-2, with a yield strength R e / R p0.2 The tensile strength is 300–800 MPa. m The pressure is 400–1000 MPa, and the elongation at break (A) is 10–25%. Lifting components can be advantageously made lighter through lightweight openings, for example, Figure 3b The vertical support component 36 has been made lighter. Corresponding weight reduction can also be achieved in the second support element and the lifting support component. The weight of the fan to be lifted is generally less than 1000 kg, and the weight of the lifting accessories can be less than 200 kg.

[0100] Figure 6In one embodiment, the various steps of the method according to the invention are illustrated in block diagram. The lifting fitting is advantageously mounted on the fan located above the fan to be replaced, or, in the case where the fan to be replaced is the uppermost fan, mounted on the wall. To remove the fan, it is advantageous to remove the covering strip and insulation between the fans, so that the top and bottom edges of the fans can be exposed and used by the second fastening device. In step 200, the guide rail and support device are fastened to the lugs of the upper fan by ball-locking pins, which advantageously form the second fastening device, and are secured against the wall above the fan with bolt fasteners, such as... Figure 3a As shown. In step 202, the support device is locked to the guide rail, and advantageously, its long fastening hole allows the guide rail to be adjusted to a horizontal position before fastening. When fastened to the wall, the support device can be adjusted to the longer position of its telescopic component and can be locked using the two pins provided by the lifting fitting.

[0101] In step 204, the travel stop is rotated to make way for the bracket, allowing the bracket to fit onto the guide rail, so that the bracket and intermediate support can fit onto the guide rail. In step 206, during replacement, the travel stop is tightened back into its original position, for example, using bolts.

[0102] In step 206, the lifting element is secured to the holes on the side of the fan to be replaced using bolts and fastening plates, for example, those provided with the support element which is part of the lifting element. When replacing the uppermost fan, the fan can be secured through the upper hole in the end plate which is part of the support element, but in other cases it can be secured through the lower hole in the end plate. In step 208, the support element can be secured to the vertical arm of the lifting element using ball-locking pins.

[0103] In step 210, the vertical position of the lifting element can be adjusted using bolts on the bracket. Bolts in the second support element of the vertical arm can be used to adjust the position of the fan.

[0104] When the lifting fitting is securely fastened to the blower to be removed and supported on the overhead blower, the blower to be removed can be lifted from the blower components remaining in the pulp dryer.

[0105] When fastening the lifting accessories and lifting elements to the fan to be conveyed according to steps 200-210, steps 212-218 and reference can be made. Figures 4a to 4cThe blower 12 to be replaced is removed from the pulp dryer and placed on the suspension of the replacement device. In step 212, the screws above the bracket 24 are used to adjust the height of the lifting element, in other words, to a vertical position, and the blower 12 is suspended from the lifting accessory 10. If necessary, the position of the blower 12 is adjusted in step 214 by adjusting the second lifting support 62 with screws. In step 216, the blower 12 suspended on the lifting accessory 10 is adjusted according to the bracket 24. Figure 4a The position shown is conveyed from the first end 20 of guide rail 18 to Figure 4a and 4b The second end 22 is shown. In step 220, according to Figure 4c The fan 12 rotates 180° around the joint 42 of the lifting element 14 to reach the overhead crane. In step 222, the center of gravity of the fan is attached to the overhead crane, and then in step 224, the lifting accessory can be removed from the fan. The bracket may include a separate lifting lug through which the fan to be removed can be attached to the overhead crane. A new fan can be installed by repeating steps 200-224 in reverse order.

[0106] If the wind turbine to be removed is the topmost turbine in the wind turbine tower, separate counter plates can be formed in the wind turbine tower for use by the lifting accessories, where the counter plates are used to support the lifting accessories.

[0107] Alternatively, instead of a second fan directly above the fan to be removed, it is conceivable that there are two support devices that would support the lifting fitting to a fan located to the side of the fan or a fan positioned diagonally opposite to the fan.

Claims

1. A lifting accessory (10) for a blower (12) of a pulp dryer (100), said lifting accessory (10) comprising: - Lifting element (14), for securing the lifting accessory (10) to the fan (12) to be lifted, and - A first fastening device (16) is used to lock the lifting element (14) to the fan (12) during lifting. The characteristic feature is that the lifting accessory (10) further includes: - The guide rail (18) includes a first end (20) and a second end (22). - A bracket (24), adapted to the guide rail (18), is used for the lifting element (14) to be suspended on the bracket (24) while the fan (12) is conveyed on the guide rail (18). - A support device (28), connected to the guide rail (18), is used to suspend the lifting accessory (10) from the second fan (13) such that the guide rail (18) is supported in a substantially horizontal direction by the support device (28).

2. The lifting accessory according to claim 1, characterized in that, The lifting accessory (10) also includes a support element (26) adapted to the first end (20) of the guide rail (18) to support the guide rail (18) to another fan (13) above.

3. The lifting accessory according to claim 2, characterized in that, The lifting accessory (10) includes a quick-fastening device (30), which is a bolt fastener (32) for removably fastening the lifting element (14), the support device (28) and the guide rail (18) to each other.

4. The lifting accessory according to any one of claims 2-3, characterized in that, The guide rail (18) includes a removable travel stop (34) at one end (22).

5. The lifting accessory according to any one of claims 2-4, characterized in that, The lifting element (14) includes: - A vertical arm (36) includes two ends (38, 40), one end (38) of which is connected to the bracket (24). - Lifting support (60), connected to the vertical arm (36), for securing the lifting element (14) to the fan (12), and - A second lifting support (62) is connected to the second end (40) of the vertical arm (36) for securing the lifting element (14) to the fan (12).

6. The lifting accessory according to claim 5, characterized in that, Between the bracket (24) and the vertical arm (36), there is a joint (42) equipped with a rotation axis perpendicular to the guide rail (18), so that the vertical arm (36) can rotate at least partially about its longitudinal axis.

7. The lifting accessory according to any one of claims 2-6, characterized in that, The support device (28) is adapted to be angled relative to the longitudinal direction of the guide rail (18), and the support device (28) is telescopic, comprising at least two parts (44) which are at least partially internally adapted to each other to support the guide rail (18) in a substantially horizontal direction.

8. The lifting accessory according to any one of claims 2-7, characterized in that, At least the support device (28) and the support element (26) include a shape-locking second fastening device (46) for fastening the support device (28) around the edges (47, 49) belonging to the second fan (13) and also for fastening the support element (26).

9. The lifting accessory according to claim 8, characterized in that, The second fastening device (46) also includes a bolt fastener (50) for locking.

10. The lifting accessory according to any one of claims 2-9, characterized in that, The lifting element (14), the supporting element (26), and the supporting device (28) are steel profiles.

11. The lifting accessory according to any one of claims 1-10, characterized in that, The support device (28) is fastened to the guide rail (18) at a point 0-30% of the length of the guide rail (18) at the other end (22) of the guide rail (18).

12. The lifting accessory according to claim 11, characterized in that, The support device (28) is fastened to the guide rail (18) at a point 5-15% of the length of the guide rail (18) at the other end (22) of the guide rail (18).

13. The lifting accessory according to any one of claims 1-12, characterized in that, The guide rail (18) consists of two adjacent and separate rails (78) that are fastened to each other.

14. A method for conveying a fan (12) of a pulp dryer (100) from a pulp dryer (100) via a lifting accessory (10), the method comprising the steps of: a) Remove the railing (54) or a portion of the service platform (52) of the pulp dryer (100). b) Lift the lifting accessory (10) to the fan (12). c) Secure the lifting accessory (10) to the fan (12). d) Remove the blower (12) from the slurry dryer (100). e) While the blower (12) is suspended from the lifting fitting (10), the blower (12) is conveyed to the outside of the pulp dryer (100) in a substantially horizontal position. Its characteristic is that, before step c), -The second fan (13) is suspended above the fan (12) by the lifting accessory (10). - The guide rail (18) belonging to the lifting accessory (10) is supported substantially horizontally on the second fan (13). In step e), the fan (12) is transported by the bracket (24) on the guide rail (18) so as to transport the fan (12) horizontally to the outside of the service platform (52).

15. The method according to claim 14, characterized in that, In step b), the lifting accessory (10) is lifted to the fan (12) as a plurality of separate components, and the lifting accessory (10) is assembled from the plurality of separate components before suspension.

16. The method according to claim 14 or 15, characterized in that, The fan (12) is lifted by the lifting fitting (10) after step d) and before step e).

Images