JPH1058340A - Device for facilitating screw fastening and loosening - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate removal during non-use by suspending an expander unit on an annular carrier table in such a manner as to rise and lower on the respective related spring traction, and connecting the same to a coupling conduit of a conduit device in a movable connecting configuration. SOLUTION: The above device includes an annular carrier table 5 corresponding to the circular outer line of a cylinder cover 1 which can be suspended on a hoist separately provided in the vicinity, for example, a crane hook if there is no available work station hoist in a machine room, by use of an annular belt ring having one ring 7. The annular carrier table 5 is provided with an expander unit related to a tap bolt 3. The expander unit 9 is suspended on a traction roller 11 of a spring traction 12 related to the respective parts built in the annular carrier table 5. By the assistance of the expander unit 9, the tap bolt 3 related to the respective parts can be extended, thereby facilitating fastening and loosening of a nut 4. Shifting from the cylinder cover of the up and down cylinder machine to another cylinder can be made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a longitudinally threaded bolt which can be acted upon by a pressure medium via a conduit arrangement which can be connected to a pressure medium source, which can be preferably taken on an annular carrier. Screw connection comprising a screw bolt and a nut which can be screwed into the screw bolt, provided with an extender unit which is placed and supported at the same time, in particular in connection with a cylinder lid of a large engine The present invention relates to a device for facilitating fastening or loosening.

[0002]

2. Description of the Related Art In a large engine such as a large two-stroke diesel engine, a device having a rigidly built transfer table incorporating the above-described method and a stretching unit fixedly disposed thereon is used. Was associated with each cylinder head.

[0003]

SUMMARY OF THE INVENTION
Since a device for introducing the above-described method is required for each head, a high expense is required. The adaptation of the well-known building concept of the known device also results in a very unwieldy arrangement with poor proximity to the cylinder lid, which is the area of the cylinder lid, for example the exhaust discharge passage. It is difficult to maintain and repair the extension device unit and the device provided therein. On the basis of the fixed arrangement of the stretcher unit, it is necessary to form the supply conduit associated with the stretcher unit as a hole on the carriage side,
This hole makes fabrication difficult. Known arrangements, therefore,
Obviously, it is not cost-effective and easy to maintain.

[0004] From this, a simple and cost-effective means which not only keeps the construction costs relatively low, but also guarantees the ease of operation and maintenance and leaves the structure around the screw connection possible. There is a problem of using the above method to improve an apparatus incorporating the above-described method.

[0005]

SUMMARY OF THE INVENTION In accordance with the present invention, an annular carrier is formed of a crane-operable loose structure element which can be positioned away from a threaded connection, and which comprises an extender unit. Is solved by being suspended on an annular carrier so as to be able to ascend and descend on the respective associated spring traction, to allow a connection in a movable connection arrangement to the coupling conduit of the conduit arrangement.

[0006] This arrangement creates a movable device which can be moved in an effective manner, for example in the case of a lifting cylinder machine, from cylinder lid to cylinder lid or even out. This requires only one device according to the invention for all cylinder lids. Since the device can be completely displaced, proximity to devices in the area of the cylinder lid, for example exhaust exhaust passages in the area of the cylinder lid in a two-stroke diesel engine, is also not impaired. The stretcher unit can be easily lowered or raised since it is incorporated in a spring traction which acts as a mass balance device. This also ensures a high and good serviceability if the carriage has to be held at a distance from the cylinder lid because of the superstructure in the area of the cylinder lid. A self-moving coupling conduit associated with the stretcher unit allows for easy up and down movement of the stretcher unit. The connection holes on the side of the carriage for feeding to the stretcher unit are made unnecessary in an effective manner here. A more particular advantage of the arrangement according to the invention lies in that the freely suspended stretcher unit can be easily replaced, which makes its maintenance and service easier. Thus, the disadvantages of the technical concept application of the generic concept described at the outset are completely eliminated with the arrangement according to the invention, and the overall efficiency of the display is guaranteed.

[0007] Advantageous developments and suitable refinements of the arrangement here are set out in the claims. The carriage may thus suitably be provided with a downwardly extending stand. This stance allows a simple installation on a lid or the like to which the device according to the invention is intended.

[0008] One further suitable arrangement is that the annular carriage has one
It can be in providing a carrier band ring with a ring. This allows for a simple mounting on the crane's hook as is actually available in an engine room such as a ship or power plant.

In a further refinement to a superior arrangement, the annular carriage can comprise two parts which are connected to each other via a spring traction housing, in which case the upper part is fitted with a conveyor belt ring and the lower part is mounted. The side part is penetrated by a spring pulling roller and is provided with a standing leg. This arrangement advantageously incorporates the spring-loaded housing into the annular carrier structure in one piece and derives a correspondingly simple and compact structure. The shape of the upper and lower parts of the annular carrier creates in an advantageous manner simultaneously two floors which provide a number of places for a view over all of the necessary equipment.

A further improvement to an excellent arrangement is that a stump arranged in the area between the spring pulls is provided in the lower part of the annular carriage, on which a support element for supporting the stretcher unit is required. It is in what is put in the case of not being done. This assures a safe and accident-free storage of the support element on the annular carrier so that a good serviceability can be felt effectively and a hand-held when necessary is realized.

[0011] The lower portion of the annular carriage may also conveniently carry a fake nipple associated with the coupling conduit. The associated coupling conduit end removed from the associated extension unit may be secured to the dummy nipple. This ensures that the coupling conduit detached from the associated stretcher unit does not sag freely, thereby ensuring that the risk of disaster and damage is avoided. At the same time, it is possible for the dummy nipple to be configured to cause a conduit closure, so that a separate confinement element can be omitted.

[0012]

1 shows a cylinder lid 1 of a lifting and lowering cylinder machine which may be associated with a large two-stroke diesel engine. The cylinder lid 1 has a corresponding built-in exhaust discharge passage 2. Cylinder lid 1
Is held by a screw bolt 3 passing through the lid and fixed to the cylinder side, and a nut 4 into which the bolt can be screwed.

The device according to the invention, which is mounted on the cylinder lid 1 in FIG. 1, facilitates the fastening or loosening of the nut 4 and the assembling or dismantling thereby. The device according to the invention uses a transport band ring with one ring 7,
It has an annular carrier 5 corresponding to the circular outline of the cylinder lid 1 which can be hung on a crane hook in the absence of a nearby hoist, for example a workplace hoist available in the machine room. The annular carriage 5 carries an extender unit 9 associated with the screw bolt 3. Stretcher unit 9
With the help of, the respective threaded bolt 3 can be extended, which facilitates the fastening or loosening of the nut 4. Corresponding to the arrangement of the screw bolts on the pitch circle, extender units 9 on the pitch circle having the same diameter and the same pitch are also arranged.

With the help of the cranes described above, the device according to the invention can be lifted, moved and lowered. This allows the device of the present invention to be moved from the cylinder lid of the lifting cylinder machine at hand to another cylinder lid, or moved from warehouse to warehouse so that it can be stored when not needed. . As can be seen from FIG. 1, the annular carriage is positioned at a distance above the cylinder lid during insertion so as not to cause a collision with the exhaust discharge passage 2 or the like. In this regard, the annular carriage has a downwardly extending stand 10 which can be mounted on the cylinder lid 1.

The extender unit 9 is suspended from an annular carrier 5 which can be positioned at a distance above the cylinder lid 1. To facilitate the operation of the stretcher unit 9, the stretcher unit 9 is suspended in the annular carrier 5 by traction rollers 11 of a spring traction 12 associated with each of the built-in. The spring tractions 12 are mass-balanced so that they can be raised or lowered without consuming significant energy, as the stretcher unit 9 associated with them is worth. The structure and mode of operation of spring traction are well known.
The spring tractions 12 used here each comprise a drum housing 13, which has two support latches 14 arranged in opposition to one another in diameter. Attached to this support latch are spaced apart rings 15 or 16 which constitute the upper or lower portion of the annular carriage 5, these rings being provided with connecting forks 17 associated with the support latch 14. I have. Thus, the drum housing 13 of the spring traction 12 functions as an isolator between the rings 15, 16 forming two assembly decks parallel to and spaced apart from the cylinder lid.

The rings 15, 16 are annular in the embodiment shown. However, polygonal arrangements could also be considered.

Related drum housing against spring force
The traction rollers 11 of the spring traction 12, which can extend from or be retracted into the drum housing by spring force,
The lower ring 16 associated therewith passes through the inner guide hole and at its free end a conveying element, here a spring safety hook 18
This spring safety hook can be brought into contact with a transport element, here a transport hanger 19, which is fixed to the relevant extension unit 9. The standing leg 10 is fixed to the lower ring 16. The conveyor belt ring 6 is fixed to the upper ring 15.

The extender unit 9 is a hydraulic cylinder-piston unit capable of acting on a pressurized fluid. For the supply of pressurized fluid to the stretcher unit 9, the upper ring
Above 15 there is arranged an annular conduit 20 which can be connected here to a pressure medium source, not shown here, for example a hydraulic pump, from which the coupling conduit 21 associated with the individual stretcher unit 9 emerges. I have. The coupling conduit 21 is formed of a flexible pipe, which causes the associated extension unit 9 to perform a raising / lowering operation. Annular conduit 20 has a connection end head 22 associated with each coupling conduit. These connection end heads are connected to each other by a short connection pipe unit 23. This joint tube unit may also be formed as a plexible pipe section.

In one embodiment shown, each extension unit 9
Is associated with a respective associated coupling conduit 21. As will be appreciated, each stretcher unit can be a multi-unit configuration in which a plurality of coupling conduits 21 belonging to its own stretcher unit can be adapted to be withdrawn from the collective connection end head.
Similarly, instead of the illustrated annular conduit 20 with individual extension units 9 or connecting end heads 22 associated with connecting conduits 21, one large connecting end head 22 associated with all connecting conduits 21, or at least It would be conceivable to provide a plurality of, preferably adjacent, extension units 9 or connecting end heads associated with their coupling conduits 21.

The connection end head 22 is preferably formed as a box or a cubic block, in which the side connection nipples for the circumferentially extending connection tube unit 23 and the upward connection to the respectively associated connection conduit 21. A nipple 24 is provided. As long as there are a large number of coupling conduits 21 per connection end head, a correspondingly large number of associated connection nipples are provided. This is also effective when the annular conduit 20 is omitted. In such a configuration, the connecting nipple corresponding to the annular conduit 20 is omitted.

The stretcher unit 9 is also provided with a corresponding connection nipple 24. Connecting conduit 21 and connecting pipe unit
23 is a connection socket that can be mounted on the connection nipple 24
It has 26. One of the connection end heads also has a suitable connection socket and a supply conduit leading to a pressure medium source
It has a forward protruding nipple for 25. Mounting compatibility for the coupling conduit 25 associated nipple may be provided for all connection end heads 22. In the supply line 25 a control valve, not shown here for adjusting or switching the pressure on and off, may be provided.

As long as the device of the present invention is not in application, the coupling conduits 21 can be uncoupled from their respective extender units. In order to prevent the free end of the uncoupled coupling conduit 21 from hanging freely, the lower ring 16 is provided with a dummy conduit nipple 27 associated with the coupling conduit, the coupling conduit 21 having its free connection over this dummy nipple. The socket 26 can be fixed. The coupling conduit secured at its front connection socket 26 on the masquerade nipple 27 is shown in FIG. 1 at 21 '. The shape of the imitation nipple 27 matches the shape of the connection nipple 24. Moreover, the masquerade nipple 27 can be closed such that the sealing of the inserted coupling conduit 21 occurs automatically. It would also be conceivable to provide a blocking element associated with the coupling conduit 21, for example, in the region of the connection end head 22.

The extender unit 9, which is constructed as a hydraulic cylinder-piston unit, is best seen in FIG. 2, as shown in FIG. Rotatable parts 9a, 9 that can move relatively
b. The so-called surge chamber 28 can exert a pressurized fluid on a hole 29 leading to an associated connection nipple provided in the upper rotating part 9b. The axial movement of the two rotating parts 9a, 9b on the opposite surface side is provided with a head that ensures that the lower rotating part 9a does not slip down by the action of gravity from the rotating part 9b suspended from above using the transport hanger 19. It is limited by a stopper 30 formed as a bolt. In operation, the extender units 9 are lowered onto the corresponding screw bolts 3 and are brought into screw contact at the part of the screw bolts 3 traveling from the nut 4. In this connection, the upper rotating part 9 b has a central threaded hole 31, which corresponds to the threaded hole of the nut 4, by means of which the extender unit 9 can be screwed onto the associated threaded bolt 3. . To make this possible, the transport hanger 19 is provided with a swivel joint 32.

The extender unit 9 brought into contact with the screw bolt 3 has a bushing-shaped support element, ie a distance piece 33, surrounding the nut 4 whose lower rotating part 9a has been brought into place in advance. Screw into the back until it is arranged. Distance pieces of this kind 33
The stretcher unit supported on is shown at 9 'in FIG. The lower rotating part 9a is provided with a downwardly projecting shoulder seat 34, which can be engaged in a bushing-shaped distance piece 33, as best seen in FIG. This centers the distance piece. The stretcher unit 9 screwed in this way is supported on the distance piece of the cylinder lid 1.

When not in use, the distance piece 33 is loaded on the annular carrier 5 as shown at 33 'in FIG. In order to make it possible for the bushing-shaped distance piece 33 to be reliably slid onto the annular carriage 5, the lower ring 16 is provided with a stump 35 projecting upwards, on each of which there is an associated stump. The distance piece can be fixed. When necessary, the distance piece 33 is simply removed by hand, see FIG.
It is mounted on the cylinder lid in such a way as to be solved.
However, it would also be possible for the distance pieces to be firmly fixed to the respective extension unit, ie to its lower rotating part 9a.

The distance piece 33 has a circumferential cut 36. The nut 4 has a circumferential hole 37. As can be seen from FIG. 2, in these holes insertable pins 38 can be inserted through the cuts 36 so that the associated nut 4 can be turned. To facilitate this, the screw bolt 3 is biased by the pressure fluid impact of the extender unit 9 as described above.

When the nut 4 is retracted, the nut 4 rests on the associated elongated screw bolt 3 on the cylinder lid 1.
Must be screwed in until it is placed in the place. The removal of the bias of the screw bolt 3 produces the desired expansion force acting on the nut 4. When the nut 4 is relaxed, the tensile force acting on the nut by the corresponding bias of the screw bolt 3 is increased so that the nut 4 can be easily unwound. With the help of the pin 38, this does not actually provide any significant power.

The above is a description of one preferred embodiment of the present invention. The present invention is not limited to the above embodiment.

[0029]

The annular carrier is formed of a loose structural element which can be operated by a crane to allow positioning away from the screw connection, and the extender unit is raised and lowered on the respective associated spring traction. The device is inexpensive, by being suspended on an annular carrier to be able to descend and being connected in a movable connection configuration to the coupling conduit of the conduit device.
In addition, removal when not in use is facilitated, which has the effect of facilitating maintenance and inspection of large cylinder machines.

[Brief description of the drawings]

FIG. 1 is a drawing of the device according to the invention in a position installed on a cylinder lid of a lifting cylinder machine.

FIG. 2 is a cross-sectional view of a separate stretcher unit of the device, conforming to FIG. 1, illustrated with an associated screw connection;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder cover 3 Screw bolt 4 Nut 5 Annular carrier 6 Conveyor belt ring 7 1 ring 9 Stretcher unit 10 Stand 11 Pulling roller 12 Spring pulling 13 Drum housing 15 Ring (upper side) 16 Ring (lower side) 21 Connecting conduit 22 Connection End head 23 Connection tube unit 24 Connection nipple exiting upward 25 Supply conduit 27 Dummy nipple 33 Support element 35 Stump

 ──────────────────────────────────────────────────続 き Continuation of front page (71) Applicant 596181855 41 Teglholmsgade, DK-2450 Copenhagen SV, Denmark

Claims (11)

[Claims] 1. A longitudinally threaded bolt, which can be acted upon by a pressure medium via a conduit arrangement which can be connected to a pressure medium source, which can be taken in on a preferably annular carrier. A screw connection comprising a screw bolt and a nut which can be screwed onto the screw bolt, provided with an extender unit which can be supported at the same time, in particular for fastening or loosening a screw connection in connection with a cylinder lid of a large engine. In the simplification device, the annular carriage is formed of a loose structural element operable by a crane to allow positioning away from the screw connection, and the stretcher unit is mounted on each associated spring traction. Fastening or loosening of a screw connection, characterized in that it is suspended on an annular carrier so as to be able to ascend and descend so that it can be connected to the connecting conduit of the conduit device in a movable connection configuration. Equipment. 2. The apparatus according to claim 1, wherein said annular carriage comprises a downwardly projecting stand. 3. Apparatus according to claim 1, wherein the annular carrier comprises a carrier band attached to the carrier. 4. The annular carrier has two parts which are connected to each other via a spring-loaded housing, and a carrier band ring contacts an upper part of the two parts to form the two parts. Apparatus according to any of the preceding claims, characterized in that the lower part of the part has a standing leg in a configuration that allows the traction rollers of the spring traction to penetrate. 5. The coupling conduit is arranged from at least one of the connection end heads integrated into one annular conduit via a coupling tube unit, preferably on the upper part of the annular carriage. 6. A method according to claim 1, characterized in that at least one of said connection end heads comprises a connection to a supply conduit leading to a pressure medium source. Equipment. 6. Apparatus according to claim 1, wherein the connecting conduit and preferably the supply conduit section are also formed of flexible pipes. 7. A connection nipple, wherein the connection end heads are arranged opposite one another for the connection tube unit, and at least one connection nipple for a coupling conduit arranged transversely to the connection tube unit. 7. A box-shaped or cubic block comprising an optional connection nipple for a supply conduit arranged transversely to the connection nipple for the coupling conduit. The device described in 1. 8. The stretcher unit is adapted to be mounted around the associated nut on the penetrating structure portion of the associated screw bolt, and to be carried on the annular carriage when removed. Device according to any of the preceding claims, characterized in that it is associated with a support element comprising: 9. The lower portion of the annular carriage comprises an upwardly projecting stump adapted to mount and secure the support element. 8. The apparatus according to 8. 10. A coupling conduit, wherein said annular carrier is preferably located within a lower portion of said annular carrier, said coupling conduit having an attachable conduit end detachable from an associated stretcher unit. Apparatus according to any of the preceding claims, characterized in that it comprises a simulated nipple. 11. Apparatus according to any of the preceding claims, characterized in that at least one, preferably a number of coupling conduits are associated with each extension unit.