EP1714936B1 - Lifting device for use in fitting and/or removing heavy flange bolts and method for fitting such a flange bolt - Google Patents
Lifting device for use in fitting and/or removing heavy flange bolts and method for fitting such a flange bolt Download PDFInfo
- Publication number
- EP1714936B1 EP1714936B1 EP20060075870 EP06075870A EP1714936B1 EP 1714936 B1 EP1714936 B1 EP 1714936B1 EP 20060075870 EP20060075870 EP 20060075870 EP 06075870 A EP06075870 A EP 06075870A EP 1714936 B1 EP1714936 B1 EP 1714936B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flange
- jack
- bolt
- lifting device
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
- B25B23/0085—Counterholding devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/16—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same abutted flanges
Definitions
- the invention relates to a lifting device for use in fitting and removing heavy threaded flange bolts in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis.
- Flanged joints are often used in industrial plants, such as oil refineries, power stations, chemical factories and the like in order to connect ends of pipes to each other.
- the flanges and the corresponding flange bolts can be of a very large and heavy design. Fitting and removing the heavy flange bolts, which can weigh up to 70 - 80 kg, is currently still often performed manually, since the use of a crane is expensive and in many cases is even not possible because there is insufficient hoisting space above the bolt hole where the threaded bolt is to be fitted or removed.
- a first fitter inserts the flange bolt from below into the corresponding bolt hole, generally from a crouching position or down on his knees. He moves the flange bolt further upwards into the bolt hole with both hands until the top end of the bolt is projecting with a number of leads above the top flange, so that a second fitter can screw a nut onto the top end of the bolt. Sometimes the nut does not screw smoothly onto the flange bolt, so that the latter tends to turn with the nut. The first fitter then has to apply even more effort to hold the bolt. In the case of very heavy flange bolts a lever beam is also sometimes used to move the flange bolt upwards in the bolt hole.
- the object of the invention is to make it easier to fit and remove heavy threaded flange bolts in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis.
- US 6.560.836B1 discloses a hand tool for the removal of bound bolts out of an engine shaft flange assembly. After the nuts are loosened, the bolts are still bound in the engine shaft flange assembly.
- the hand tool comprises two flanges, wherein a second flange is movable relative to a first flange.
- the first flange is positioned stationary to the engine shaft flange assembly and has extraction bolt housings abutting to the flange assembly.
- the extraction bolt housings cover the bolts with a predefined play between the housings and the bolts, which permits a relative movement of the bolts with respect to the housings.
- the second flange of the hand tool is connected to U-shaped extractor rods, which are placed on the free ends of the bound bolts to be extracted.
- the second flange is engaged with a jack bolt.
- the free end of the jack bolt abuts to the first flange of the hand tool.
- guide rods are provided to guide the movement of the second flange relative to the first flange. Screwing up the jack bolt causes a translation of the second flange of the hand tool together with the extractor rods with respect to the first flange. This results in a pushing force on the bound bolts, which will be pushed out the engine flange assembly and will be pushed into the extraction bolt housings.
- the hand tool of US 6.560.836B1 is designed to remove bolts out of a engine flange assembly by pushing on the free ends of the bolts with extractor rods.
- This purpose differs from the purpose of the lifting device according to the invention.
- This hand tool is in fact unsuitable and not arranged for the stated purpose of the invention to make it easier to fit and remove heavy threaded flange bolts into or from a flange assembly. In the first place, this hand tool misses a supporting part to support heavy bolts and to move them in a vertical direction upwards into the flange assembly.
- the components of the hand tool, in particular the extraction bolt housings make it impossible to reach the bolts for screwing a nut on them to finally fit the bolts in the flange assembly. Consequently, in contrast to the lifting device according to the invention, this hand tool cannot be used for supporting the weight of heavy flange bolts during removal of these bolts from a flange assembly or during insertion and fitting of these bolts into a flange assembly
- the invention relates in particular to fitting and/or removing heavy flange bolts 5, which can have a weight of up to 70 - 80 kg, in the situation in which the axis of the flange assembly is substantially vertical.
- Figs. 1a and 1b further show a lifting device indicated in general by 8, which lifting device is used for fitting and/or removing such heavy flange bolts 5.
- the embodiment of the lifting device 8 according to the invention shown in Figs. 1a and 1b comprises a jack 9 in the form of a screw jack.
- the jack 9 comprises an elongate housing 10 and a lead screw 11 which is rotatable in said housing, and outside the housing is provided with a drive nut 12.
- the lead screw 11 can be turned with the aid of an auxiliary tool that is applied to the drive nut 12.
- This auxiliary tool can be a key or a crank by means of which the lead screw 11 is turned manually, or it can be an electric or pneumatic rotating tool.
- the jack 9 further comprises a first pressure plate 13 which is connected to the housing 10 and a second pressure plate 14 which is movable relative to said first pressure plate.
- the second pressure plate 14 can be moved relative to the first pressure plate 13 by means of the lead screw 11.
- the jack 9 in the exemplary embodiment shown is a commercially available jack which is used in the automobile industry for fitting McPherson springs. However, the jack can also be another type of jack.
- the lifting device 8 further comprises a first supporting part 16, which is connected to the first pressure plate 13 and extends in the transverse direction relative to the axis of the jack 9, and a second pressure part 17, which is connected to the second pressure plate 14 and extends in the transverse direction relative to the axis of the jack.
- the first supporting part 16 is preferably connected in a detachable manner by way of a first connecting part 18 to the first pressure plate 13, and the second supporting part 17 is preferably connected in a detachable manner by means of a second connecting part 19 to the second pressure plate 14.
- the connecting parts 18 and 19 are fixed on the pressure plates 13 and 14 by means of bolts 20.
- the first supporting part 16 and the first connecting part 18 together form a substantially L-shaped part.
- the second supporting part 17 and the second connecting part 19 likewise together form a substantially L-shaped part.
- the supporting parts 16 and 17 are preferably shaped like a fork.
- the first supporting part 16 is further provided with a plastic disc 21. Said plastic disc is formed so as to be complementary to the fork shape of the supporting part 16 in such a way that it can be pushed to fit in and around the fork-shaped supporting part 16, and is subsequently also removable again, so that it can be fitted as desired on and removed from the desired supporting part 16.
- the second supporting part 17 is designed for placing between the two flanges 1 and 2 during use of the lifting device for fitting and/or removing heavy flange bolts, and the first supporting part 16 with the plastic disc 21 is designed for placing under a flange bolt 5 to be fitted and for supporting the latter.
- the lengths in the vertical direction of the connecting parts 18 and 19 are the same in Fig. 1 .
- the connecting parts 18, 19 of the L-shaped parts 16, 18 and 17, 19 respectively can be longer or shorter, or can be of different lengths from each other.
- a tool kit can be provided, consisting of a jack 9 and several L-shaped parts 16, 18 and 17, 19 respectively with different dimensions.
- a tool kit consisting of a jack 9 and four accompanying L-shaped attachments, two of which have a short connecting part 18, 19 and can be used as the L-shaped parts 16, 18 and 17, 19 respectively with a short connecting part 18, 19, and the other two L-shaped attachments of which have a long connecting part 18, 19 and can be used as the L-shaped parts 16, 18 and 17, 19 respectively with a long connecting part 18.
- two suitable L-shaped attachments can then be selected and fitted by means of bolts 20 on the first pressure plate 13 and on the second pressure plate 14 of the jack 9, in order to form a complete lifting device 8 which is suitable in that situation.
- different lifting devices 8 can be made with this tool kit by combining a jack 8 with two short L-shaped attachments or with one short L-shaped attachment and one long L-shaped attachment, or with two long L-shaped attachments, which lifting devices are suitable for fitting or removing a flange assembly with not so thick, moderately thick or rather thick flanges 1, 2 respectively with the corresponding shorter or longer flange bolts 5.
- the L-shaped attachments forming the L-shaped parts 16, 18 and 17, 19 respectively can be made of steel.
- the L-shaped attachments form a considerable part of the weight of the lifting device 8 and certainly also form a considerable part of the weight of the tool kit, as described above.
- the L-shaped attachments can advantageously be made of aluminium, so that a relatively light lifting device 8 or tool kit is produced.
- Figs. 2a and 2b show the situation in which a closing flange 2 (top flange) is placed on a flange 1 (bottom flange) connected to a vertically disposed pipe end 3.
- the flange 2 could also be connected to a pipe end (not shown) in the same way as the flange 1.
- the bolt holes 4 in the flanges 1 and 2 lie opposite each other.
- Figs 3a and 3b further show a flange bolt 5 to be fitted, having a first nut 6 screwed onto it.
- the flange bolt 5 could also be provided with a fixed head on the end concerned.
- the flange bolt 5 is inserted manually by a fitter from below into the corresponding bolt hole 4 in the bottom flange 1.
- the lifting device 8 As shown in Figs. 4a and 4b , the lifting device 8 according to the invention is then placed.
- the supporting parts 16 and 17 are moved apart here.
- the second supporting part 17 is placed between the flanges 1 and 2, and the first supporting part 16 with the plastic disc 21 is placed under the flange bolt 5 to be fitted.
- the flange bolt 5 is now supported by the lifting device 8, so that the fitter who initially inserted the flange bolt 5 into the corresponding bolt hole has his hands free.
- the lifting device 8 can be fitted by the fitter who initially inserted the flange bolt 5 into the corresponding bolt hole 4, or by a second fitter.
- Figs. 5a and 5b the flange bolt 5 is moved further into the corresponding bolt hole and the second nut 7 to be screwed onto the flange bolt 5 on the top side of the top flange 2 is also shown.
- the flange bolt 5 is moved further upwards by turning the lead screw 11 of the jack 9 (arrow 23 in Fig. 5b ). In the course of this the flange bolt 5 moves through between the legs of the fork-shaped second supporting part 17.
- Figs. 6a and 6b show the situation in which the flange bolt 5 has moved so far up that one or two leads of the flange bolt 5 extend above the top flange 2, as indicated at 24.
- the two supporting parts 16 and 17 have now moved so far towards each other that the two pressure plates 13 and 14 of the jack 9 are lying close to each other or resting against each other.
- the second nut 7 can now be screwed onto the flange bolt 5.
- the flange bolt 5 is supported on the plastic disc 21 provided in the fork-shaped supporting part 16 and consequently undergoes a friction force which offers resistance to slipping and turning, so that the flange bolt 5 is prevented from turning along with the nut 7 when the latter is being screwed onto it.
- the situation shown in Figs. 6a and 6b corresponds substantially to the situation shown in Figs. 1a and 1b .
- the second nut 7 is screwed further onto the flange bolt 5, so that the flange bolt moves further upwards and comes away from the first supporting part 16 with plastic disc 21.
- the lifting device 8 can now be removed, as shown in Figs. 7a and 7b .
- Figs. 8a and 8b show the situation in which the flange bolt 5 with nuts 6 and 7 is fitted in the flange assembly.
- the operations described above must be carried out for each of the flange bolts 5 to be fitted in the bolt holes 4 of the flange assembly.
- the number of bolt holes 4 can be relatively large and can be up to 24 or more.
- the lifting device can be of a different design and, for example, comprise a different type of jack.
- the supporting parts 16, 17 could also be designed in such a way that they can be connected directly (i.e. without the connecting parts 18, 19) to the pressure plates 13, 14.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Forklifts And Lifting Vehicles (AREA)
Description
- The invention relates to a lifting device for use in fitting and removing heavy threaded flange bolts in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis.
- Flanged joints are often used in industrial plants, such as oil refineries, power stations, chemical factories and the like in order to connect ends of pipes to each other. In certain cases the flanges and the corresponding flange bolts can be of a very large and heavy design. Fitting and removing the heavy flange bolts, which can weigh up to 70 - 80 kg, is currently still often performed manually, since the use of a crane is expensive and in many cases is even not possible because there is insufficient hoisting space above the bolt hole where the threaded bolt is to be fitted or removed.
- Manually fitting a heavy threaded flange bolt in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis, is performed as follows. A first fitter inserts the flange bolt from below into the corresponding bolt hole, generally from a crouching position or down on his knees. He moves the flange bolt further upwards into the bolt hole with both hands until the top end of the bolt is projecting with a number of leads above the top flange, so that a second fitter can screw a nut onto the top end of the bolt. Sometimes the nut does not screw smoothly onto the flange bolt, so that the latter tends to turn with the nut. The first fitter then has to apply even more effort to hold the bolt. In the case of very heavy flange bolts a lever beam is also sometimes used to move the flange bolt upwards in the bolt hole.
- Manually fitting and removing heavy flange bolts, which can be present in a relatively large number (up to 24 or more) in one flanged joint, means a heavy load being placed upon the fitters, and can also lead to unsafe situations.
- The object of the invention is to make it easier to fit and remove heavy threaded flange bolts in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis.
- This object is achieved by a lifting device according to
claim 1 and a method according toclaim 14. - The effort that has to be expended by the fitters is considerably reduced by making use of the lifting device according to the invention and using the method according to the invention. In certain cases only one fitter is now needed to fit or remove a flange bolt. Furthermore, a flange bolt can be fitted or removed more quickly, and the chance of dangerous situations arising is considerably reduced.
- Preferred embodiments of the lifting device and method according to the invention are described in the dependent claims.
- It is remarked that
US 6.560.836B1 discloses a hand tool for the removal of bound bolts out of an engine shaft flange assembly. After the nuts are loosened, the bolts are still bound in the engine shaft flange assembly. The hand tool comprises two flanges, wherein a second flange is movable relative to a first flange. In use the first flange is positioned stationary to the engine shaft flange assembly and has extraction bolt housings abutting to the flange assembly. The extraction bolt housings cover the bolts with a predefined play between the housings and the bolts, which permits a relative movement of the bolts with respect to the housings. The second flange of the hand tool is connected to U-shaped extractor rods, which are placed on the free ends of the bound bolts to be extracted. The second flange is engaged with a jack bolt. The free end of the jack bolt abuts to the first flange of the hand tool. Furthermore, guide rods are provided to guide the movement of the second flange relative to the first flange. Screwing up the jack bolt causes a translation of the second flange of the hand tool together with the extractor rods with respect to the first flange. This results in a pushing force on the bound bolts, which will be pushed out the engine flange assembly and will be pushed into the extraction bolt housings. - Thus, the hand tool of
US 6.560.836B1 is designed to remove bolts out of a engine flange assembly by pushing on the free ends of the bolts with extractor rods. This purpose differs from the purpose of the lifting device according to the invention. This hand tool is in fact unsuitable and not arranged for the stated purpose of the invention to make it easier to fit and remove heavy threaded flange bolts into or from a flange assembly. In the first place, this hand tool misses a supporting part to support heavy bolts and to move them in a vertical direction upwards into the flange assembly. Additionally, the components of the hand tool, in particular the extraction bolt housings make it impossible to reach the bolts for screwing a nut on them to finally fit the bolts in the flange assembly. Consequently, in contrast to the lifting device according to the invention, this hand tool cannot be used for supporting the weight of heavy flange bolts during removal of these bolts from a flange assembly or during insertion and fitting of these bolts into a flange assembly. - The invention will be explained in the description of an exemplary embodiment that follows with reference to the drawing, in which:
-
Fig. 1 shows a view in cross-section (Fig. 1a ) and a view in perspective and in cross-section (Fig. 1b ) of a flange assembly with a flange bolt and lifting device according to the invention. -
Figs. 2 to 8 show the successive steps of fitting a heavy flange bolt with the aid of the lifting device according to the invention. -
Fig. 1a shows in a view in cross-section, andFig. 1b shows in a view in perspective and in cross-section, a flange assembly with a flange bolt and a lifting device according to the invention, in which the axis of the flange assembly is substantially vertical. The flange assembly consists of twoflanges bottom flange 1 is connected to apipe end 3 by means of a welded seam (not shown). Said welded seam is made in a V-shaped recess formed bybevelled edges pipe end 3 and on a connectingpart 1b of thebottom flange 1. Thetop flange 2 is designed as a closing flange. Thetop flange 2 could, however, also be designed in the same way as thebottom flange 1 and connected to a pipe end, in which case the flange assembly connects two pipe ends to each other. Theflanges bolt holes 4 lying opposite each other. The flanges are connected to each other by means offlange bolts 5 projecting through thebolt holes 4, only one of which flange bolts is shown inFigs. 1a and1b . The number of bolts connecting the twoflanges flange bolts 5 is provided with afirst nut 6 and asecond nut 7. However, it is also possible for aflange bolt 5 to be provided with a fixed head instead of afirst nut 6 on the end concerned. - The invention relates in particular to fitting and/or removing
heavy flange bolts 5, which can have a weight of up to 70 - 80 kg, in the situation in which the axis of the flange assembly is substantially vertical. -
Figs. 1a and1b further show a lifting device indicated in general by 8, which lifting device is used for fitting and/or removing suchheavy flange bolts 5. - The embodiment of the
lifting device 8 according to the invention shown inFigs. 1a and1b comprises ajack 9 in the form of a screw jack. Thejack 9 comprises anelongate housing 10 and alead screw 11 which is rotatable in said housing, and outside the housing is provided with adrive nut 12. Thelead screw 11 can be turned with the aid of an auxiliary tool that is applied to thedrive nut 12. This auxiliary tool can be a key or a crank by means of which thelead screw 11 is turned manually, or it can be an electric or pneumatic rotating tool. Thejack 9 further comprises afirst pressure plate 13 which is connected to thehousing 10 and asecond pressure plate 14 which is movable relative to said first pressure plate. Thesecond pressure plate 14 can be moved relative to thefirst pressure plate 13 by means of thelead screw 11. Thejack 9 in the exemplary embodiment shown is a commercially available jack which is used in the automobile industry for fitting McPherson springs. However, the jack can also be another type of jack. - The
lifting device 8 further comprises a first supportingpart 16, which is connected to thefirst pressure plate 13 and extends in the transverse direction relative to the axis of thejack 9, and asecond pressure part 17, which is connected to thesecond pressure plate 14 and extends in the transverse direction relative to the axis of the jack. The first supportingpart 16 is preferably connected in a detachable manner by way of a first connectingpart 18 to thefirst pressure plate 13, and the second supportingpart 17 is preferably connected in a detachable manner by means of a second connectingpart 19 to thesecond pressure plate 14. The connectingparts pressure plates bolts 20. The first supportingpart 16 and the first connectingpart 18 together form a substantially L-shaped part. The second supportingpart 17 and the second connectingpart 19 likewise together form a substantially L-shaped part. The supportingparts part 16 is further provided with aplastic disc 21. Said plastic disc is formed so as to be complementary to the fork shape of the supportingpart 16 in such a way that it can be pushed to fit in and around the fork-shaped supportingpart 16, and is subsequently also removable again, so that it can be fitted as desired on and removed from the desired supportingpart 16. - The second supporting
part 17 is designed for placing between the twoflanges part 16 with theplastic disc 21 is designed for placing under aflange bolt 5 to be fitted and for supporting the latter. - The lengths in the vertical direction of the connecting
parts Fig. 1 . Depending on the dimensions of theflange bolt 5 and theflanges parts parts - In order to provide a
lifting device 8 which is flexible in use in different situations for different dimensions of theflange bolt 5 and of theflanges 1 and 2 (in particular different flange thicknesses), a tool kit can be provided, consisting of ajack 9 and several L-shapedparts jack 9 and four accompanying L-shaped attachments, two of which have a short connectingpart parts part part parts part 18. - In a certain situation two suitable L-shaped attachments can then be selected and fitted by means of
bolts 20 on thefirst pressure plate 13 and on thesecond pressure plate 14 of thejack 9, in order to form acomplete lifting device 8 which is suitable in that situation. In this waydifferent lifting devices 8 can be made with this tool kit by combining ajack 8 with two short L-shaped attachments or with one short L-shaped attachment and one long L-shaped attachment, or with two long L-shaped attachments, which lifting devices are suitable for fitting or removing a flange assembly with not so thick, moderately thick or ratherthick flanges longer flange bolts 5. - The L-shaped attachments forming the L-shaped
parts lifting device 8 and certainly also form a considerable part of the weight of the tool kit, as described above. The L-shaped attachments can advantageously be made of aluminium, so that a relativelylight lifting device 8 or tool kit is produced. - The various steps in the process for fitting a heavy threaded flange bolt in the case of a flange assembly consisting of two flanges lying opposite each other and provided with bolt holes, and having a substantially vertical axis, with the aid of the lifting device according to the invention are shown in
Figures 2 to 8 , in the "a" figures a part of the flange assembly with flange bolt and lifting device being shown in side view, while in the "b" figures a part of a flange assembly with flange bolt and lifting device is shown in a perspective view from the top side and in cross-section. -
Figs. 2a and 2b show the situation in which a closing flange 2 (top flange) is placed on a flange 1 (bottom flange) connected to a vertically disposedpipe end 3. As mentioned earlier, theflange 2 could also be connected to a pipe end (not shown) in the same way as theflange 1. The bolt holes 4 in theflanges -
Figs 3a and 3b further show aflange bolt 5 to be fitted, having afirst nut 6 screwed onto it. Instead of thenut 6, theflange bolt 5 could also be provided with a fixed head on the end concerned. Theflange bolt 5 is inserted manually by a fitter from below into thecorresponding bolt hole 4 in thebottom flange 1. - As shown in
Figs. 4a and 4b , thelifting device 8 according to the invention is then placed. The supportingparts part 17 is placed between theflanges part 16 with theplastic disc 21 is placed under theflange bolt 5 to be fitted. Theflange bolt 5 is now supported by thelifting device 8, so that the fitter who initially inserted theflange bolt 5 into the corresponding bolt hole has his hands free. Thelifting device 8 can be fitted by the fitter who initially inserted theflange bolt 5 into thecorresponding bolt hole 4, or by a second fitter. Turning thelead screw 11 of thejack 9 by means of an auxiliary tool (not shown) placed on thedrive nut 12 of the lead screw causes the two supportingparts flange bolt 5 is moved upwards into the corresponding bolt hole (arrow 22 inFigs. 4a, 4b andFigs. 5a, 5b ). - In
Figs. 5a and 5b theflange bolt 5 is moved further into the corresponding bolt hole and thesecond nut 7 to be screwed onto theflange bolt 5 on the top side of thetop flange 2 is also shown. Theflange bolt 5 is moved further upwards by turning thelead screw 11 of the jack 9 (arrow 23 inFig. 5b ). In the course of this theflange bolt 5 moves through between the legs of the fork-shaped second supportingpart 17. -
Figs. 6a and 6b show the situation in which theflange bolt 5 has moved so far up that one or two leads of theflange bolt 5 extend above thetop flange 2, as indicated at 24. The two supportingparts pressure plates jack 9 are lying close to each other or resting against each other. Thesecond nut 7 can now be screwed onto theflange bolt 5. Theflange bolt 5 is supported on theplastic disc 21 provided in the fork-shaped supportingpart 16 and consequently undergoes a friction force which offers resistance to slipping and turning, so that theflange bolt 5 is prevented from turning along with thenut 7 when the latter is being screwed onto it. The situation shown inFigs. 6a and 6b corresponds substantially to the situation shown inFigs. 1a and1b . - The
second nut 7 is screwed further onto theflange bolt 5, so that the flange bolt moves further upwards and comes away from the first supportingpart 16 withplastic disc 21. Thelifting device 8 can now be removed, as shown inFigs. 7a and 7b . -
Figs. 8a and 8b show the situation in which theflange bolt 5 withnuts - The operations described above must be carried out for each of the
flange bolts 5 to be fitted in the bolt holes 4 of the flange assembly. The number ofbolt holes 4 can be relatively large and can be up to 24 or more. - For the removal of a
flange bolt 5 the operations described above are in principle performed in reverse order. - The lifting device can be of a different design and, for example, comprise a different type of jack. The supporting
parts parts 18, 19) to thepressure plates
Claims (15)
- Lifting device (8) for use in fitting and removing heavy threaded flange bolts (5) in a flange assembly consisting of two flanges (1, 2) lying opposite each other and provided with bolt holes (4), and having a substantially vertical axis, characterized in that, it comprises a jack (9) with a first part (13) and a second part (14) which is movable relative to the first part (13), and means for moving the first part (13) and the second part (14) relative to each other, a first supporting part (16) which is designed for placing under a flange bolt (5) to be fitted or removed and for supporting the latter, connected to the first part (13) and extending in the transverse direction relative to the axis of the jack (9), and a second supporting part (17), connected to the second part (14) and extending in the transverse direction relative to the axis of the jack (9).
- Lifting device according to claim 1, in which the jack (9) is a screw jack with a lead screw (11) extending through the second part, for moving the second part (14) relative to the first part (13).
- Lifting device according to claim 1 or 2, in which the supporting parts (16, 17) are detachably connected to the first and second parts (13, 14) respectively of the jack (9).
- Lifting device according to one or more of the claims 1 - 3, in which each of the two supporting parts (16, 17) is shaped like a fork.
- Lifting device according to one or more of the claims 1 - 4, in which one of the two supporting parts (16, 17) is provided with a plastic disc (21).
- Lifting device according to one or more of the claims 1 - 5, in which each of the two supporting parts (16, 17) is connected, by means of a connecting part (18, 19) extending substantially parallel to the axis of the jack (9), to the first and second parts (13, 14) respectively of the jack (9), in such a way that the supporting parts (16, 17) together with the connecting parts (18, 19) form substantially L-shaped parts.
- Lifting device according to claim 6, in which the L-shaped part is made of aluminium.
- Tool kit for fitting and removing heavy threaded flange bolts (5) in a flange assembly, comprising a jack (9) with a first part (13) and a second part (14) which is movable relative to the first part (13), and means (12) for moving the first part (13) and the second part (14) relative to each other, and at least two substantially L-shaped parts which are connected or are to be connected detachably to the first and the second parts (13, 14) and each consist of a supporting part (16, 17), which is designed for placing under a flange bolt (5) to be fitted or removed and for supporting the latter for fitting or removing the heavy flange bolt (5), and a connecting part (18, 19) extending substantially transversely to the supporting part (16, 17), which connecting part (18, 19) can be connected or is connected to the first or the second part (13, 14) of the jack (9).
- Tool kit according to claim 8, in which the jack (9) is a screw jack with a lead screw (11) extending through the second part (14), for moving the second part (14) relative to the firstpart (13).
- Tool kit according to claim 8 or 9, comprising at least three substantially L-shaped parts, in which the dimensions of the L-shaped parts, in particular the lengths of the connecting parts (18, 19), are different from each other.
- Tool kit according to one or more of the claims 8 - 10, in which each of the supporting parts (16, 17) is shaped like a fork.
- Tool kit according to one or more of the claims 8 - 11, in which at least one of the supporting parts (16, 17) is provided with a plastic disc (21).
- Tool kit according to one or more of the claims 8 - 12, in which the L-shaped parts are made of aluminium.
- Method for fitting a heavy threaded flange bolt (5) in the case of a flange assembly consisting of two flanges (1, 2) lying opposite each other and provided with bolt holes (4), and having a substantially vertical axis, with the aid of a lifting device (8) according to one of claims 1 - 7, comprising the following steps:- manually inserting a flange bolt (5) provided with a first nut (6) or head from below into a bolt hole (4) of the bottom flange (11), the first nut (6) or the head being on the bottom end part of the flange bolt (5);- placing the lifting device (8) on the flange assembly in such a way that one of its supporting parts (17) is placed between the two flanges (1, 2), and the other supporting part (16) is placed under the flange bolt (5) placed in the bolt hole (4) and supports the flange bolt (5);- operating the jack (9) in such a way that the supporting part (16) placed under the flange bolt (5) moves upwards with the flange bolt (5) supported on it until the flange bolt (5) is projecting with at least one lead above the top flange (2);- screwing a second nut (7) onto the part of the flange bolt (5) projecting above the top flange (2);- further tightening the second nut (7); and- removing the lifting device (8) from the flange assembly.
- Method according to claim 14, in which if the jack (9) is in the form of a screw jack with a lead screw (11), in order to move the flange bolt (5) upwards, the lead screw is turned manually with the aid of a key or crank, or with an electric or pneumatic rotating tool.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1028828A NL1028828C2 (en) | 2005-04-20 | 2005-04-20 | Lifting device for use in mounting and / or dismantling heavy flange bolts and method for mounting such a flange bolt. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1714936A1 EP1714936A1 (en) | 2006-10-25 |
EP1714936B1 true EP1714936B1 (en) | 2009-07-15 |
Family
ID=35429316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060075870 Not-in-force EP1714936B1 (en) | 2005-04-20 | 2006-04-12 | Lifting device for use in fitting and/or removing heavy flange bolts and method for fitting such a flange bolt |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1714936B1 (en) |
DE (1) | DE602006007745D1 (en) |
NL (1) | NL1028828C2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105818094A (en) * | 2016-05-05 | 2016-08-03 | 广西桂冠电力股份有限公司大化水力发电总厂 | Special device for dismounting and mounting disc type oil-submerged pump of transformer |
US10906164B2 (en) * | 2018-06-22 | 2021-02-02 | Raytheon Technologies Corporation | Immobilizer tool set for bolt installation and method |
CN110744491B (en) * | 2019-10-31 | 2021-08-20 | 中船黄埔文冲船舶有限公司 | Auxiliary tool for disassembling close-fitting bolt |
WO2021122289A1 (en) * | 2019-12-17 | 2021-06-24 | Vestas Offshore Wind A/S | A kit for positioning bolts in a flange connection |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB582027A (en) * | 1944-06-14 | 1946-11-01 | Vincent Gordon Yeomans | Improvements in the erection of concrete shuttering and a wall bracket for use therein |
DE8617893U1 (en) * | 1986-07-04 | 1986-09-25 | Klann, Horst, 7730 Villingen-Schwenningen | Compression spring tensioner |
FR2619177B1 (en) * | 1987-08-07 | 1991-10-11 | Facom | HELICAL SPRING COMPRESSOR |
FR2653051A1 (en) * | 1989-10-18 | 1991-04-19 | Mecanique Energetique | SPRING COMPRESSION DEVICE. |
FR2692508B1 (en) * | 1992-06-17 | 1994-09-30 | Framatome Sa | Device for handling studs of mass and large dimensions. |
FR2749362B1 (en) * | 1996-06-03 | 1998-08-07 | Mecanique Energetique | IMPROVEMENT TO SPRING COMPRESSORS |
JP3553738B2 (en) * | 1996-08-12 | 2004-08-11 | 株式会社中部プラントサービス | Heavy load balancer and nut lifting support |
DE29804271U1 (en) * | 1998-03-11 | 1998-05-07 | Hazet-Werk Hermann Zerver GmbH & Co. KG, 42857 Remscheid | Flexible protective pad for a spring tensioner consisting of two axially movable, claw-shaped gripping jaws |
US6560836B1 (en) * | 2002-07-11 | 2003-05-13 | Richard Briscoe | Hand tool for extracting bolts |
-
2005
- 2005-04-20 NL NL1028828A patent/NL1028828C2/en not_active IP Right Cessation
-
2006
- 2006-04-12 DE DE200660007745 patent/DE602006007745D1/en active Active
- 2006-04-12 EP EP20060075870 patent/EP1714936B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
EP1714936A1 (en) | 2006-10-25 |
NL1028828C2 (en) | 2006-10-30 |
DE602006007745D1 (en) | 2009-08-27 |
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