CH712345A2 - Device for positioning a holding device for a screw connection in overhead mounting and dismounting. - Google Patents

Abstract

Device (1) for positioning a holding device (20) for the screw nut (11) of a screw connection in overhead mounting and dismounting, wherein the screw connection connects a first component (16) to a second component (17), wherein the first component (16) and the second component (17) are arranged substantially horizontally and stationary relative to one another, and wherein the first component (16) is arranged in a vertical direction above the second component (17), wherein the screw connection comprises a screw (12) which forms a first portion (14) and a second portion (15) and wherein the first portion (14) of the screw (12) is connected at its vertically upper end to the first component (16) and wherein the second portion (15) of the screw (12 ) passes through a substantially vertically in the second component (17) arranged bore (18) and wherein the from the second component (17) vertically downwardly projecting part of the second portion (15 ) of the screw (12) in this area comprises a thread (13) for fastening the nut (11), wherein the holding device (20) when mounted, the nut (11) from a starting position (21) in a holding position for screwing with the screw (12) brings and / or disassembled from a starting position (21) in a collecting position (22) for unscrewing the nut (11) of the screw (12), characterized in that the screw (12) both part of the screw connection to Connecting the first component (16) with the second component (17), as well as part of the device (1) for positioning the holding device (20), wherein the screw (12) at its lower end a means (19) for releasably connecting comprising a power transmission means (23) and said power transmission means (23) is operatively connected to a drive device (24), said drive means (24) being fixedly mounted in a housing (25) and d this housing (25) at its vertically upper end, the holding means (20) for the nut (11), wherein the operative connection between the power transmission means (22) and the drive device (24) allows a vertical movement of the housing (25) and thereby characterized Retaining means (20) between the starting position (21) which is vertically spaced downwards from the screw (12), and the holding or catching position (22) which is directly opposite the screw (12), reciprocally movable ,

Description

The invention relates to devices for positioning a holding device for a nut on the one hand and on the other hand a fastening nut for a biasing device, which in each case for overhead assembly and disassembly of a screw connection of two substantially horizontally arranged components with the features of the preamble of claim. 1 and claim 2 are applied.

When assembling large horizontally arranged components, such as housings of turbomachines, difficulties occur during assembly and disassembly due to the size of the individual components. To be able to produce a permanent connection between the individual components, in particular the housing halves are separated by a horizontal parting line in the lower and upper part and are then permanently fastened by means of screw connections.

Usually, the screws are screwed from below through a bore of the lower half of the housing in the upper half of the housing, so that the lower free end of the screws for screwing with a nut is available.

By these screw-nut connection, the components are frictionally together firmly by screw and nut are screwed together under elongation of the screw. This elongation causes in accordance with the law of material a bias in the screw, which imposes the force required for frictional component connection normal force on the components.

In particular, for connecting the components of turbomachinery, it is advantageous to use hydraulic tensioning devices. These initially lengthen the screw hydraulically, before tightening the nut of the screw connection. When removing the long hydraulic pressure, the screw is then supported in the mother, which maintains the elongation of the screw and thus the desired bias. To loosen the screw connection can be reversed by renewed hydraulic lengths of the screw, the mother relieved and then released.

As already explained, it is common in large turbomachinery that their housing are divided horizontally and the two halves of the housing with screws of, for example, 65 kg and nuts, for example, 25 kg are connected.

Due to the predetermined arrangement of the screws, the screwing of the nut must often be done by hand over head, because due to the limited space on the base frame of a turbomachine and due to the surrounding supply lines for the turbomachine, the assembly or disassembly of the nuts is using a lift truck or other auxiliary equipment usually not possible.

The above also applies to the assembly and disassembly of the biasing device, which is sometimes still a larger weight 90 kg and more cumbersome than the nut of the screw connection for the housing parts to be joined.

After previous installation methods, the assembly or disassembly was done with two people overhead, which was not optimal in terms of ergonomics and safety at work.

The invention is therefore an object of the invention to provide devices with the one hand, the nut of the screw connection for the components to be joined and on the other hand, the fastening nut of the biasing device in overhead mounting in an optimal position for attachment to the screw of the screw connection for the components to be connected is brought.

The object of the invention is achieved by devices according to claim 1 and claim 2.

The respective subclaims relate to advantageous developments.

In the inventive devices are devices for positioning a holding device on the one hand a nut and on the other hand, a fastening nut for a biasing device, which are respectively used for overhead mounting and dismounting a screw connection of two substantially horizontally arranged components.

With the help of novel devices, the assembly and disassembly of screw over head can be easily performed even in tight spaces, the basic principle of the device on the one hand, the optimal positioning of the nut for the screw connection of the components to be joined and on the other hand, the optimal positioning of the fastening nut ensured for the pretensioner with respect to the screw.

By this novel device prevents the nut or the fastening nut for the biasing device fall during assembly or disassembly and result in dangers for fitters.

In addition, the device ensures that the nut on the one hand and the fastening nut for the biasing device on the other hand always find an optimal point of engagement with respect to the thread of the screw and thus tilting one hand, the nut or on the other hand, the fastening nut of the biasing device is prevented.

Embodiments of the invention are illustrated in the drawings and are explained in more detail below. Show it

Fig. 1 shows a device according to a first embodiment (positioning of the nut) of the present invention

Fig. 2 shows a device according to a second embodiment (positioning the fastening nut of the pretensioner) of the present invention. Fig. 1 shows a device 1 according to the invention in a first embodiment, focused on it, a holding device 20 for the screw nut 11 of a screw connection for overhead assembly and disassembly.

The device 1 according to FIG. 1 is initially in a starting position 21, i. the holding device 20 transfers the nut 11 during assembly from this starting position 21 into a holding position 22 for screwing with the thread 13 of the screw 12 and thus for fastening the first component 1 to the second component 2.

In this holding position 22, the device 1 may be located on the one hand in the mounting position for the nut or the holder 20 may alternatively be in a collecting position 22 (disassembly) for unscrewing the nut 11 of the screw 12.

The device 1 according to FIG. 1 thus serves for positioning a holding device 20 for a screw connection in overhead mounting and dismounting, wherein the screw connection connects a first component 16 with a second component 17 and wherein the first component 16 and the second component 17 are arranged substantially horizontally and mutually stationary and wherein the first component 16 is arranged in the vertical direction above the second component 17.

The screw connection comprises a screw 12 which comprises a first portion 14 and a second portion 15 and wherein the first portion 14 of the screw 12 is connected at its vertically upper end to the first component 16 (not shown) and wherein the second Section 15 of the screw 12 passes through a substantially vertically disposed in the second member 17 bore 18 and wherein the vertically projecting downward from the second member 17 portion of the second portion 15 of the screw 12 in its upper region a thread 13 for securing the nut 11th includes.

When mounting the nut 11, the holding device 20 brings the nut 11 from a starting position 21 in a holding position 22 for screwing with the screw 12 and / or disassembly of the nut 11, the holding device 20 from a starting position 21 in a collecting position 22 for Unscrew the nut 11 from the screw 12 are brought.

In the inventive device 1, the screw 12 is both part of the screw connection for connecting the first component 16 to the second component 17, as well as part of the device 1 for positioning the holding device 20th

At the lower end, the screw 12 comprises means 19 for releasable connection with a power transmission means 23, wherein this is movable with a drive device 24 in operative connection. The drive device 24 is fixedly mounted in a housing 25, wherein the housing 25 at its vertically upper end, the holding device 20 for the nut 11 comprises.

By the operative connection between the fixed to the screw 12 power transmission means 23 and the drive device 24, a vertical movement of the housing 25 is made possible, thereby the holding device 20 between the initial position 21, which is spaced vertically downward from the screw 12, and the holding or the catching position 22, which is the screw 12 directly opposite, is movable back and forth.

The drive device 24 may include a pinion 26 to which the vertical movement of the power transmission means 23 is transmitted in a rotational movement. In this case, the pinion 26 may be arranged on a shaft 27 which is driven by hand 28 and / or by an electric motor 29.

It is also advantageous if the shaft 2f of the drive device 24 (not shown) is in operative connection with a self-locking worm gear.

It is also possible that the holding device 20 is movably mounted on the housing 25 of the drive device 24, also the holding device 20 may comprise complementary elements for engagement with the nut 11.

The power transmission means 23 may be arranged on the one hand substantially coaxial with the holding device 20 and on the other hand may also be arranged substantially coaxially with the screw 12 of the screw connection.

Also, the power transmission means 23 may be rigid or movable or advantageously designed as a roller chain.

It is particularly advantageous if the power transmission means 23 is screwed 19 connected to the screw 12 of the screw connection is particularly advantageous.

A sleeve (not shown) and / or a disc (not shown) can advantageously be arranged between the nut 11 and the second component 17, wherein these can also be brought from the holding device 20 into the holding or catching position 22.

Fig. 2 shows a device 2 as a second embodiment according to a second embodiment, which is focused on providing a holding means 20 for the fastening nut 30 of a biasing means 35 of a screw connection in overhead mounting and dismounting.

The device 2 according to the illustrations of Fig. 2 is in a starting position 21, i. the holding device 20 transfers the pretensioning device 35 and its fastening nut 30 during assembly from this starting position 21 into a holding position 22 for screwing to the thread 31 of the screw 12.

In this holding position 22, the device 2 may be located on the one hand in the mounting position for the fastening nut 30 of the biasing means 35 or the holding device 20 may alternatively in a collecting position 22 (disassembly) for unscrewing the fastening nut 30 of the biasing means 35 of the screw 12th are located.

The device 2 according to FIG. 2 thus serves to position a holding device 20 for a biasing device 35 and its fastening nut 30 for a screw connection in overhead mounting and dismounting, wherein the screw connection connects a first component 16 with a second component 17 and wherein the first component 16 and the second component 17 are arranged substantially horizontally and with respect to one another in a stationary manner, and wherein the first component 16 is arranged outside the second component 17 in the vertical direction.

The screw connection comprises a screw 12 which comprises a first portion 14 and a second portion 15 and wherein the first portion 14 of the screw 12 is connected at its vertically upper end to the first component 16 (not shown) and wherein the second Section 15 of the screw 12 passes through a substantially vertically disposed in the second component 17 bore 18 and wherein the vertically projecting downward from the second member 17 portion of the second portion 15 of the screw 12 in its lower region a thread 31 for fixing the biasing means 35th covered by its fastening nut 30.

When mounting the biasing means 35 and its fastening nut 30, the holding device 20 brings the fastening nut 30 from a starting position 21 in a holding position 22 for screwing with the screw 12 and / or disassembly of the fastening nut 30, the holding device 20 from a starting position 21 in a catching position 22 for unscrewing the fastening nut 30 of the pretensioner 35 are brought from the screw 12.

In the inventive device 2, the screw 12 is both part of the screw connection for connecting the first component 16 to the second component 17, as well as part of the device 2 for positioning the holding device 20th

At the lower end, the screw 12 comprises a device 19 for releasable connection with a power transmission means 23, wherein this is movably connected to a drive device 24 in operative connection. The drive device 24 is fixedly mounted in a housing 25, wherein the housing 25 at its vertically upper end, the holding device 20 for the nut 11 comprises.

By the operative connection between the attached to the screw power transmission means 23 and the drive device 24, a vertical movement of the housing 25 is made possible, thereby the holding device 20 between the starting position 21, which is spaced vertically downward from the screw 12, and the Holding or the collection position 22, which is the screw 12 directly opposite, is movable back and forth.

The drive device 24 may include a pinion 26 to which the vertical movement of the power transmission means 23 is transmitted in a rotational movement.

In this case, the pinion 26 may be arranged on a shaft 27 which is driven by hand 28 and / or by an electric motor 29.

It is also advantageous if the shaft 27 of the drive device 24 with a self-locking worm gear (not shown) is in operative connection.

It is also possible that the holding device 20 is movably mounted on the housing 25 of the drive device 24, also the holding device 20 may comprise complementary elements for engagement with the nut 11.

The power transmission means 23 may be arranged on the one hand substantially coaxial with the holding device 20 and on the other hand may also be arranged substantially coaxially with the screw 12 of the screw connection.

Also, the power transmission means 23 may be rigid or movable or advantageously designed as a roller chain.

It is particularly advantageous if the power transmission means 23 is screwed 19 connected to the screw 12 of the screw connection is particularly advantageous.

Claims (13)

It is also possible that the biasing means 35 is formed in several parts in the vertical direction and the fastening nut 30 of the biasing means 35 is located at the vertical upper end and wherein the vertically lower portion is provided for engagement with the holding device 20. [0051] 1 device for screw connection of screw connection 2 device for pretensioning device and its fastening nut 11 screw nut of screw connection 12 screw of screw connection 13 thread of screw for screw nut 14 first section of screw 15 second section of screw 16 first component 17 second component 18 bore 19 releasable connection device 20 holding device 21 starting position 22 holding or catching position 23 power transmission means 24 drive device 25 housing 26 pinion 27 shaft 28 manual drive 29 motor drive 30 fixing nut of the pretensioner 31 thread of the screw for pretensioner 32 mounting for holding device 33 washer of the pretensioner 34 guide sleeve of the pretensioner 35 biasing device claims 1. Device (1) for positioning a holding device (20) for the screw nut (11) of a screw connection in overhead assembly and disassembly, wherein the screw connection connects a first component (16) with a second component (17), wherein the first component ( 16) and the second component (17) are arranged substantially horizontally and mutually stationary, and wherein the first component (16) in the vertical direction above the second component (17) is arranged, wherein the screw connection comprises a screw (12) having a first portion (14) and a second portion (15), and wherein the first portion (14) of the screw (12) is connected at its vertically upper end to the first component (16) and wherein the second portion (15) of the screw (12) passes through a substantially vertically in the second component (17) arranged bore (18) and wherein the from the second component (17) vertically downwardly projecting part of the second portion (15) the screw (12) in this area a thread (13) for securing the nut (11), wherein the holding device (20) when mounted the nut (11) from a starting position (21) in a holding position (22). for screwing with the screw (12) brings and / or disassembled from a starting position (21) in a collecting position (22) for unscrewing the nut (11) of the screw (12) brings, characterized in that the screw (12) is both part of the screw connection for connecting the first component (16) to the second component (17), as well as part of the device (1) for positioning the holding device (20), wherein the screw (12) at its lower end a device ( 19) for detachable connection with a power transmission means (23) and this power transmission means (23) with a drive device (24) movable in operative connection, wherein the drive device (24) in a housing (25) fixedly mounted i St and this housing (25) at its vertically upper end of the holding means (20) for the nut (11), wherein the operative connection between the power transmission means (23) and the drive device (24) allows a vertical movement of the housing (25) and wherein thereby, the restraining means (20) between the home position (21) spaced vertically downwardly from the screw (12) and the catching position (22) immediately opposite the screw (12) is movable. 2. Device (2) for positioning a holding device (20) for a pretensioning device (35) and its fastening nut (30) for a screw connection in overhead assembly and disassembly, wherein the screw connection a first component (16) with a second component (17) connects, wherein the first component (16) and the second component (17) are arranged substantially horizontally and mutually stationary and wherein the first component (16) in the vertical direction above the second component (17) is arranged, wherein the screw connection is a screw (12) comprising a first portion (14) and a second portion (15) and wherein the first portion (14) of the screw (12) is connected at its vertically upper end to the first component (16) and wherein second portion (15) of the screw (12) passes through a substantially vertical in the second component (17) arranged bore (18) and wherein the from the second component (17) vertically downwards protruding part of the second portion (15) of the screw (12) in this area a thread (32) for fixing the biasing means (35) by a fastening nut (30) thereof, wherein the holding means (20) when mounted the biasing means (35) and brings its fastening nut (30) from a starting position (21) into a holding position (22) for screwing with the screw (12) and / or when disassembling from a starting position (21) into a catching position (22) for unscrewing the fastening nut (30 ) of the biasing means (35) from the screw (12), characterized in that the screw (12) forms part of the screw connection for connecting the first component (16) to the second component (17) as well as part of the positioning device the holding device (20), wherein the screw (12) at its lower end comprises means (19,) for releasable connection to a power transmission means (23) and this power transmission means (23) with a drive device (24) is movably in operative connection, wherein the drive device (24) in a housing (25) is fixedly mounted and this housing (25) at its vertically upper end of the holding means (20) for the biasing device ( 35) and its fastening nut (30), wherein the operative connection between the power transmission means (23) and the drive device (24) allows vertical movement of the housing (25) and thereby the holding means (20) between the starting position (21), the screw (12) is vertically spaced downwards, and the holding or catching position (22) which is directly opposite the screw (12), reciprocally movable. 3. Device (1, 2) according to claim 1 or 2, characterized in that the drive device (24) comprises a pinion (26) to which the vertical movement of the power transmission means (23) is transmitted in a rotational movement, wherein the pinion ( 26) is arranged on a shaft (27) which is driven by hand (28) and / or by an electric motor (29). 4. Device (1, 2) according to claim 3, characterized in that the shaft (27) of the drive device (24) is in operative connection with a self-locking worm gear. 5. Device (1,2) according to one of the preceding claims, characterized in that the holding device (20) on the housing (25) of the drive device (24) is movably mounted. 6. Device (1, 2) according to one of the preceding claims, characterized in that the holding device (20) comprises complementary elements for engagement with the nut (11) or the fastening nut (30) of the biasing means (35). 7. Device (1,2) according to one of the preceding claims, characterized in that the force transmission means (23) is arranged substantially coaxially with the holding device (20). 8. Device (1,2) according to one of the preceding claims, characterized in that the force transmission means (23) is arranged substantially coaxially to the screw (12) of the screw connection. 9. Device (1,2) according to one of the preceding claims, characterized in that the force transmission means (23) is rigid or movable. 10. Device according to one of the preceding claims, characterized in that the force transmission means (23) is designed as a roller chain. 11. Device (1,2) according to one of the preceding claims, characterized in that the force transmission means (23) is screwed (19) connected to the screw (12) of the screw connection. 12. Device (1) according to claim 1, characterized in that between the nut (11) and the second component (17) a guide sleeve (34) and / or a disc (33) is arranged, which also from the holding device ( 20) in the holding or catching position (22) can be brought. 13. Device (2) according to claim 2, characterized in that the biasing means (35) is formed in several parts in the vertical direction and the fastening nut (30) of the biasing means (35) is located at the vertically lower end and wherein the vertically lower portion for the Engagement with the holding device (20) is provided.