CA1303602C - Method and an apparatus for pushing pipes along a pipe line - Google Patents
Method and an apparatus for pushing pipes along a pipe lineInfo
- Publication number
- CA1303602C CA1303602C CA000610157A CA610157A CA1303602C CA 1303602 C CA1303602 C CA 1303602C CA 000610157 A CA000610157 A CA 000610157A CA 610157 A CA610157 A CA 610157A CA 1303602 C CA1303602 C CA 1303602C
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- piston
- pushing
- duct
- elongated support
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 230000000875 corresponding effect Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 2
- 241001052209 Cylinder Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Cleaning In General (AREA)
Abstract
Abstract An apparatus for pushing forward pipes along a pipe line section is arranged to be brought down into a manhole connected to the pipe line section, and includes a pushing piston (20,26) exerting a pushing force on a pipe (8,12) with support of a holding-up device (2,18). The pushing piston (20) at its leading end carries rods (27) extending essentially to the rear end of the pushing piston and there carry a pressure abutment (28) for bringing the pipe with it during the forward pushing movement of the piston, said rods (27) aiding in supporting the pipe (8).
(Figure 1)
(Figure 1)
Description
``` ~303602 A method and an ~pparatus Por pushing pipes along a p1pe line The present invention relates to an apparatus for pushing pipes along a duct, said apparatus being arranged to be positioned in association with the ductl andincluding a pushing piston which is arranged to exert a forward pushing force ona pipe with support of a holding-up device, and a tube support~ng device for carrying the pipe around the pushing piston during movement of the later.
The invention also relates to a method for pushing forward a pipe along a duct, comprising feeding the pipes to the duct and successively pushing forward them by means of a pushing piston.
Primarily, the invention is intended to be used for jointing and pushing forwardthe jointed pipes for so called "relining". "Relining" is a method by means of which pipes are jointed and pushed, e.g. from a manhole, into an existing pipe line connected to the manhole, for reconditioning the pipe line.
Devices of the kind defined by way of introduction are earlier known. These and other devices intended for relining each have at least some of a number of disadvantages. Of these disadvantages the following may be mentioned:
1. A dimensioning of the apparatus that makes impossible bringing down and usingthe same in a simple way in a manhole. Thus, extra space for the apparatus may be required outside the manhole, in line with the pipe line intended to be reconditioned, e.g. for making space fnr the pushing piston. In some cases it isnot at all possible to perform the operations necessary without introductory excavating works in connection with a manhole or along the pipe line.
The invention also relates to a method for pushing forward a pipe along a duct, comprising feeding the pipes to the duct and successively pushing forward them by means of a pushing piston.
Primarily, the invention is intended to be used for jointing and pushing forwardthe jointed pipes for so called "relining". "Relining" is a method by means of which pipes are jointed and pushed, e.g. from a manhole, into an existing pipe line connected to the manhole, for reconditioning the pipe line.
Devices of the kind defined by way of introduction are earlier known. These and other devices intended for relining each have at least some of a number of disadvantages. Of these disadvantages the following may be mentioned:
1. A dimensioning of the apparatus that makes impossible bringing down and usingthe same in a simple way in a manhole. Thus, extra space for the apparatus may be required outside the manhole, in line with the pipe line intended to be reconditioned, e.g. for making space fnr the pushing piston. In some cases it isnot at all possible to perform the operations necessary without introductory excavating works in connection with a manhole or along the pipe line.
2. A complex and expensive associated equipment.
3. Requirement for a large working staff, i.e. normally more than two persons.
4. The operations and working steps for relining a certain pipe line is time consuming.
:
A general object of the invention is to provide an apparatus and a method greatly simplifying reconditioning of an existing duct by lining the same with pipes.
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i303~
A more specific object of the invention is to provide an apparatus and a method for pushing pipes along a pipe line, for relining the same as discussed above, which, as compared with earlier apparatus and methods is simp1er and cheaper as to its design, a~mits lowering into and use in a simple way in a manhole, with;nthe space admitted by the manhole, and admits relining of a certain pipe line for a considerably cheaper price and in a considerably shorter time than has been possible thus far.
These and other objects are attained in that, in the apparatus according to the invention, the holding-up device comprises an elongated support, means are arranged for supporting the pushing piston on said elongated support so as to bemovable between an operative position in which the piston is ready for pushing apipe in the direction of the duct, and a pipe receiving position deviating from said operative position, and means are arranged for carrying at the leading end of said elongated support a pipe retaining device for holding the trailing end portion of a previously pushed forward pipe, while performing a connecting stroke with the piston for connecting a pipe, carried around the piston, with said previously pushed forward pipe.
The method according to the invention is characterized by exerting the action ofthe piston on each pipe after it having been positioned around the pressure piston when the later takes a position deviating from the pushing direction thereof, and performing, before the pushing forward operation proper, a connect-ing stroke by the piston for connecting the pipe carried around the piston with the trailing end portion of a previously pushed forward pipe.
Different advantageous embodiments of the invention have obtained the features defined in the respective sub-claims.
As an example of the importance of the invention in practice may be mentioned that, in one embodiment of the apparatus according to the invention, intended for relining pipe lines as discussed above, relining of a pipe section of 50 -100 meters could be carried through in appr. one hour by a staff of two persons.
The invention will now be described more closely with reference to an embodimentof the apparatus of the invention shown on the attached drawingsl wherein ~ Figure 1 shows a perspective view of the apparatus, ;:
Figure 2 is a perspectiv~ view of a 50 called short pipe with a collar attached to the end thereof.
Figure 3 illustrates a further perspective view of the apparatus, one portion thereof, however, taking another position than in Figure 1, Figures 4-8 in section through the bottom portion of a manhole and a short section of a connected o1der pipe line illustrate a number of consecutive steps at use of the apparatus according to the invention. Figures 6 and 8 showing the apparatus partly sectioned.
With reference particularly to Figures 1 and 3 the apparatus as main portions includes an elongated trough-shaped bottom portion or cradle 2, open at both ends, a piston-cylinder device generally designated 4, and a collar-retaining device generally designated 6, whereof the two last-mentioned devices will be described more c10sely below. Since the present description will be carried through partly with reference to pipes of the short pipe type, with which the apparatus will be working, such a pipe will be briefly described with reference to Figure 2.
The pipe, conventionally manufactured of hard plastic, and being designated 8, at each end has a number of outer grooves 10 intended to cooperate, in a manner not shown and described, with an end collar 12. Briefly, one or more of the grooves 10 can contain sealing rings for sealing between the tube 8 and the collar 12, and otherwise define protrusions for cooperation with corresponding formations in the inside of the collar 12, for snap connection between the pipe 10 and the collar 12. The collar 12 has a symmetrical shape for receiving one pipe 8 in each end. Short pipes and collars of the kind described here can be ofconventional type, available on the market.
The cylinder, designated 14, of the piston-cylinder device 4 is pivotally mounted at 16 on a cross piece 18 between the sides of the cradle 2, at one end thereof. The piston rod included in the piston-cylinder device is designated 20, and is shown with dashed and dotted lines in Figure 1. As will appear from the fol10wing description, the cradle 2 and the cross piece 18 may be said to form part of a ~holding-up device" supportingly cooperating with the piston 20 during operation thereof. The piston rod 20 at its leading end carries a plate 22 with a partly essentially circular contour 24 with a radius somewhat less than the inner diameter of the tube 8 with the attached collar 12. The plate 22 also has a straight bevel 26 with a function to be descibed more closely below.
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q The ratio between the r~dii o~ curv~ture cf ~he plate 22 and the trough 2 is such that the p;pe 8 can be supported with clearance between the contour 24 and the inner wal1 of the trough 2, said inner wal1 in the position shown in Figure 1 extending essentially coaxial with the contour 24.
By means of three struts, or bars, 27 the plate 22 is connected to a pressure abutment plate 28, which is located essentially in plane with the rear end of the piston rod. The plate 28 has a radius, which is greater than the inner radius of the collar 12 but less than the inner radius of the trough 2. The plate 28 has a recess 30 for the cylinder 14 and the appurtenant structure extending along the same~ so that the plate 28 can move freely along the cylin-der 14 between the entirely rear position shown in Figure 1 and a forward position in the vicinity of the leading end of the cylinder, corresponding to the position of the plate 22 shown with dashed and dotted lines in Figure 1.
The hydraulic fluid supply to the cylinder 14 takes place through hoses 32 and 34, respectively, and a hydraulic fluid branch pipe 36 extends to the leading end of the cylinder 14. The details of the design of the piston-cylinder device 4 can, as mentioned above, be of a conventional kind and need therefore not be described more closely here. The hoses 32 and 34 are connected to a valve box 38which can be attached to the trough 2 or, alternatively, to the collar retainingdevice 6 described more closely below. Hydraulic hoses 40 lead to the valve box 38 from a pump assembly, not shown, the hoses 40 being so long that the pump assembly can stand on the ground adjacent to a manhole in the bottom of which the apparatus is arranged in a way appearing more closely from Figures 4-8 and the corresponding description below. With a control rod 42 connected to the valve box 38 the valve is controlled to direct hydraulic fluid as desired in therespective hoses 32 and 34. The pump assembly can be of a kind known per se and available on the market, e.g. a portable 220 v so called hydraulic packet. The apparatus~according to the invention and such a pump assembly do not occupy greater space than being able to be carried together in a small delivery van or a great passenger car.
The collar retaining device 6 includes a plate 44 which, by means of an arm 46 on each side of the trough 2, is pivotally supported in the end faces of the cross piece 18 through the corresponding wall portions of the trough 2. A handle45 is attached to the plate 44 to allow lifting of the later as will be descri-bed more closely below. In the position shown in Figure 1, in which the plate 22 . .
, ~ 3601Z
is completely inserted, -the plat~ 44 is 10catecl on a distancc from the plate 28 whichl for reasons appearing from the description below with reference to Figures 4-8, essentially corresponds to the added lengths of a pipe 8 with attached collar 12 according to Figure 2, and a further collar 12 located at some distance from that end of the pipe 8 not provided with a collar. The plate 44 furthermore has an inner arcuate recess 48 with a radius essentially cor-responding to the outer radius of the pipe 8, and thus is smaller than the outerradius of the collar 12.
The way of operation of the described apparatus in connection with relining shall now be described closer with reference to Figures 3-8.
The apparatus is placed in the way shown in Figures 4-8 in the bottom of a manhole 50, from which the pipe line to be reconditioned by relining starts. Thebeginning of this pipe line is shown at 52.
More particularly, the apparatus is placed in line with the pipe line 52 and so that the rear end of the trough 2 is supported against a step 54 in the bottom of the manhole. This step 54 can be formed in a conventional way as the end of an elongated recess in the bottom of the manhole, 1eading to an opening to whichthe pipe line 52 is connected. Lacking such a premanufactured recess some form of stop piece, forming a step, can be placed between the wall of the manhole andthe rear end of the trough 2. Suitably, the step shall not be higher than allowing the swinging movement of the piston-cylinder device 4 to the position shown in Figure 3, i.e. so that the rear end of the cylinder structure escapes the step without necessitating lifting of the trough to allow it. However, the apparatus according to the invention is not heavier than well admitting such lifting of the rear end of the trough 2, e.g. up onto the step, where appropria-te.
With the apparatus arranged in the way described, the piston-cylinder device is swung to the position shown in Figure 3 so that it points upwardly and admits receipt of a pipe, e.g. of the kind shown in Figure 2 with a collar 12 attached thereto. More particularly, the pipe is moved, with the collar 12 first, over the support structure formed by the plate 26 and the rods 27, so that the collarwill abut against the plate 28. The piston-cylinder device with the pipe sittingthereon is thereafter lowered to the position shown in Figures 4 and 6-8 and a pushing forward stroke of the pushing piston 20 is started by operating the i3036~Z
stick 42. Th;s stroke ;s ended by the l~acling ~dge o~ the collar 12 being stopped by the stop abutment 44, as shown in F~gure q.
The piston-cylinder device 4 is now raised again for rece;ving a new pipe 8 witha collar 12 attached thereto, as is indicated by the arrow designated 58 in Figure 5. The piston-cylinder dev;ce 4 with the pipe sitt;ng thereon is there-after lowered aga;n, as indicated by the arrow 60 in Figure 5. Due to the above described dimensioning of the d;stance between the plates 28 and 44, the leadingedge of the pipe 8 is then placed with some clearance with respect to the collar12 of the pipe already pushed forward. A joining stroke of the pushing piston 20 is now started in order to snap the leading edge of the new pipe into the collar. Figure 6 illustrates the end of this step.
The collar stop abutment 44 is now swung upwardly by means of the handle 45 as indicated by the arrow 62 in Figure 7, so that it will not form an obstacle to the collar 12 sitting on the first pipe 8 during the continuing pushing forward of the pipes now joined. However, as soon as this collar has passed the raised stop abutment 44, the later is lowered again for forming a stop to the collar ofa following pipe. Figure 8 illustrates this pushing forward step, indicated by arrow 64, during the ending phase thereof, immediately before the collar of the pipe sitting on the support device 22, 27 is going to be stopped by the collar stop abutment 44.
The cycle illustrated by Figures 4-8 is thereafter repeated a required number oftimes until a new pipe line, consisting of the pipes 8 joined together by means of the collars 12, has been pushed forward along the whole length of the old pipe line, e.g. to the next manhole.
For performing the described work two persons are enough. One person is down at the bottom of the manhole standing astraddle over the apparatus, this person receiving pipes handed down from the other person who is on the ground level.
The person in the manhole thereafter carries through the steps illustrated in Figures 4-8 for each pipe. Switching on and off the pump assembly located on ground level and connected via the lines 40 is dealt with by the person located there, of course.
Of course~ the invention is not limited to the embodiment described above and shown on the~drawings, but can be modified within the scope of the claims.
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Thus, it would be well possible to remotelY control the apparatus according tu the invention entirely from ground level by carrying through the swinging movements of the piston~cylinder device 4 and the stop abutment 44 by means of small hydralic cylinders controlled from ground level. Of course, the control device 38-42 will then likewise be located on ground level. A suitable guide means for bringing down each pipe onto the uppwardly pointing piston-cylinder device will then also be arranged.
Furthermore a retaining device 44 is described above and shown, which is par-ticularly suited for outer collars. At pipe lines with inner collars a clamping device for the tube including the collar can instead be used. This clamping device can e.g. be designed with jaws or similar which are abutted against the outside of the trailing end portion of the pipe. The jaws can be hydraulically operated.
It will be appreciated from the description above and the embodiment shown on the drawings that the invention makes possible use of an apparatus for relining without requiring any extra operations, such as excavating works in connection with the manhole or along the pipe line. Above all this is obtained by the illustrated design where a pipe pushed forward by the apparatus during the pushing forward movement surrounds the pushing piston, which minimizes the length of the apparatus.
:`` ` ' .
:
A general object of the invention is to provide an apparatus and a method greatly simplifying reconditioning of an existing duct by lining the same with pipes.
`:`
i303~
A more specific object of the invention is to provide an apparatus and a method for pushing pipes along a pipe line, for relining the same as discussed above, which, as compared with earlier apparatus and methods is simp1er and cheaper as to its design, a~mits lowering into and use in a simple way in a manhole, with;nthe space admitted by the manhole, and admits relining of a certain pipe line for a considerably cheaper price and in a considerably shorter time than has been possible thus far.
These and other objects are attained in that, in the apparatus according to the invention, the holding-up device comprises an elongated support, means are arranged for supporting the pushing piston on said elongated support so as to bemovable between an operative position in which the piston is ready for pushing apipe in the direction of the duct, and a pipe receiving position deviating from said operative position, and means are arranged for carrying at the leading end of said elongated support a pipe retaining device for holding the trailing end portion of a previously pushed forward pipe, while performing a connecting stroke with the piston for connecting a pipe, carried around the piston, with said previously pushed forward pipe.
The method according to the invention is characterized by exerting the action ofthe piston on each pipe after it having been positioned around the pressure piston when the later takes a position deviating from the pushing direction thereof, and performing, before the pushing forward operation proper, a connect-ing stroke by the piston for connecting the pipe carried around the piston with the trailing end portion of a previously pushed forward pipe.
Different advantageous embodiments of the invention have obtained the features defined in the respective sub-claims.
As an example of the importance of the invention in practice may be mentioned that, in one embodiment of the apparatus according to the invention, intended for relining pipe lines as discussed above, relining of a pipe section of 50 -100 meters could be carried through in appr. one hour by a staff of two persons.
The invention will now be described more closely with reference to an embodimentof the apparatus of the invention shown on the attached drawingsl wherein ~ Figure 1 shows a perspective view of the apparatus, ;:
Figure 2 is a perspectiv~ view of a 50 called short pipe with a collar attached to the end thereof.
Figure 3 illustrates a further perspective view of the apparatus, one portion thereof, however, taking another position than in Figure 1, Figures 4-8 in section through the bottom portion of a manhole and a short section of a connected o1der pipe line illustrate a number of consecutive steps at use of the apparatus according to the invention. Figures 6 and 8 showing the apparatus partly sectioned.
With reference particularly to Figures 1 and 3 the apparatus as main portions includes an elongated trough-shaped bottom portion or cradle 2, open at both ends, a piston-cylinder device generally designated 4, and a collar-retaining device generally designated 6, whereof the two last-mentioned devices will be described more c10sely below. Since the present description will be carried through partly with reference to pipes of the short pipe type, with which the apparatus will be working, such a pipe will be briefly described with reference to Figure 2.
The pipe, conventionally manufactured of hard plastic, and being designated 8, at each end has a number of outer grooves 10 intended to cooperate, in a manner not shown and described, with an end collar 12. Briefly, one or more of the grooves 10 can contain sealing rings for sealing between the tube 8 and the collar 12, and otherwise define protrusions for cooperation with corresponding formations in the inside of the collar 12, for snap connection between the pipe 10 and the collar 12. The collar 12 has a symmetrical shape for receiving one pipe 8 in each end. Short pipes and collars of the kind described here can be ofconventional type, available on the market.
The cylinder, designated 14, of the piston-cylinder device 4 is pivotally mounted at 16 on a cross piece 18 between the sides of the cradle 2, at one end thereof. The piston rod included in the piston-cylinder device is designated 20, and is shown with dashed and dotted lines in Figure 1. As will appear from the fol10wing description, the cradle 2 and the cross piece 18 may be said to form part of a ~holding-up device" supportingly cooperating with the piston 20 during operation thereof. The piston rod 20 at its leading end carries a plate 22 with a partly essentially circular contour 24 with a radius somewhat less than the inner diameter of the tube 8 with the attached collar 12. The plate 22 also has a straight bevel 26 with a function to be descibed more closely below.
~' 1303~iOlZ
q The ratio between the r~dii o~ curv~ture cf ~he plate 22 and the trough 2 is such that the p;pe 8 can be supported with clearance between the contour 24 and the inner wal1 of the trough 2, said inner wal1 in the position shown in Figure 1 extending essentially coaxial with the contour 24.
By means of three struts, or bars, 27 the plate 22 is connected to a pressure abutment plate 28, which is located essentially in plane with the rear end of the piston rod. The plate 28 has a radius, which is greater than the inner radius of the collar 12 but less than the inner radius of the trough 2. The plate 28 has a recess 30 for the cylinder 14 and the appurtenant structure extending along the same~ so that the plate 28 can move freely along the cylin-der 14 between the entirely rear position shown in Figure 1 and a forward position in the vicinity of the leading end of the cylinder, corresponding to the position of the plate 22 shown with dashed and dotted lines in Figure 1.
The hydraulic fluid supply to the cylinder 14 takes place through hoses 32 and 34, respectively, and a hydraulic fluid branch pipe 36 extends to the leading end of the cylinder 14. The details of the design of the piston-cylinder device 4 can, as mentioned above, be of a conventional kind and need therefore not be described more closely here. The hoses 32 and 34 are connected to a valve box 38which can be attached to the trough 2 or, alternatively, to the collar retainingdevice 6 described more closely below. Hydraulic hoses 40 lead to the valve box 38 from a pump assembly, not shown, the hoses 40 being so long that the pump assembly can stand on the ground adjacent to a manhole in the bottom of which the apparatus is arranged in a way appearing more closely from Figures 4-8 and the corresponding description below. With a control rod 42 connected to the valve box 38 the valve is controlled to direct hydraulic fluid as desired in therespective hoses 32 and 34. The pump assembly can be of a kind known per se and available on the market, e.g. a portable 220 v so called hydraulic packet. The apparatus~according to the invention and such a pump assembly do not occupy greater space than being able to be carried together in a small delivery van or a great passenger car.
The collar retaining device 6 includes a plate 44 which, by means of an arm 46 on each side of the trough 2, is pivotally supported in the end faces of the cross piece 18 through the corresponding wall portions of the trough 2. A handle45 is attached to the plate 44 to allow lifting of the later as will be descri-bed more closely below. In the position shown in Figure 1, in which the plate 22 . .
, ~ 3601Z
is completely inserted, -the plat~ 44 is 10catecl on a distancc from the plate 28 whichl for reasons appearing from the description below with reference to Figures 4-8, essentially corresponds to the added lengths of a pipe 8 with attached collar 12 according to Figure 2, and a further collar 12 located at some distance from that end of the pipe 8 not provided with a collar. The plate 44 furthermore has an inner arcuate recess 48 with a radius essentially cor-responding to the outer radius of the pipe 8, and thus is smaller than the outerradius of the collar 12.
The way of operation of the described apparatus in connection with relining shall now be described closer with reference to Figures 3-8.
The apparatus is placed in the way shown in Figures 4-8 in the bottom of a manhole 50, from which the pipe line to be reconditioned by relining starts. Thebeginning of this pipe line is shown at 52.
More particularly, the apparatus is placed in line with the pipe line 52 and so that the rear end of the trough 2 is supported against a step 54 in the bottom of the manhole. This step 54 can be formed in a conventional way as the end of an elongated recess in the bottom of the manhole, 1eading to an opening to whichthe pipe line 52 is connected. Lacking such a premanufactured recess some form of stop piece, forming a step, can be placed between the wall of the manhole andthe rear end of the trough 2. Suitably, the step shall not be higher than allowing the swinging movement of the piston-cylinder device 4 to the position shown in Figure 3, i.e. so that the rear end of the cylinder structure escapes the step without necessitating lifting of the trough to allow it. However, the apparatus according to the invention is not heavier than well admitting such lifting of the rear end of the trough 2, e.g. up onto the step, where appropria-te.
With the apparatus arranged in the way described, the piston-cylinder device is swung to the position shown in Figure 3 so that it points upwardly and admits receipt of a pipe, e.g. of the kind shown in Figure 2 with a collar 12 attached thereto. More particularly, the pipe is moved, with the collar 12 first, over the support structure formed by the plate 26 and the rods 27, so that the collarwill abut against the plate 28. The piston-cylinder device with the pipe sittingthereon is thereafter lowered to the position shown in Figures 4 and 6-8 and a pushing forward stroke of the pushing piston 20 is started by operating the i3036~Z
stick 42. Th;s stroke ;s ended by the l~acling ~dge o~ the collar 12 being stopped by the stop abutment 44, as shown in F~gure q.
The piston-cylinder device 4 is now raised again for rece;ving a new pipe 8 witha collar 12 attached thereto, as is indicated by the arrow designated 58 in Figure 5. The piston-cylinder dev;ce 4 with the pipe sitt;ng thereon is there-after lowered aga;n, as indicated by the arrow 60 in Figure 5. Due to the above described dimensioning of the d;stance between the plates 28 and 44, the leadingedge of the pipe 8 is then placed with some clearance with respect to the collar12 of the pipe already pushed forward. A joining stroke of the pushing piston 20 is now started in order to snap the leading edge of the new pipe into the collar. Figure 6 illustrates the end of this step.
The collar stop abutment 44 is now swung upwardly by means of the handle 45 as indicated by the arrow 62 in Figure 7, so that it will not form an obstacle to the collar 12 sitting on the first pipe 8 during the continuing pushing forward of the pipes now joined. However, as soon as this collar has passed the raised stop abutment 44, the later is lowered again for forming a stop to the collar ofa following pipe. Figure 8 illustrates this pushing forward step, indicated by arrow 64, during the ending phase thereof, immediately before the collar of the pipe sitting on the support device 22, 27 is going to be stopped by the collar stop abutment 44.
The cycle illustrated by Figures 4-8 is thereafter repeated a required number oftimes until a new pipe line, consisting of the pipes 8 joined together by means of the collars 12, has been pushed forward along the whole length of the old pipe line, e.g. to the next manhole.
For performing the described work two persons are enough. One person is down at the bottom of the manhole standing astraddle over the apparatus, this person receiving pipes handed down from the other person who is on the ground level.
The person in the manhole thereafter carries through the steps illustrated in Figures 4-8 for each pipe. Switching on and off the pump assembly located on ground level and connected via the lines 40 is dealt with by the person located there, of course.
Of course~ the invention is not limited to the embodiment described above and shown on the~drawings, but can be modified within the scope of the claims.
`` ~13~360Z
Thus, it would be well possible to remotelY control the apparatus according tu the invention entirely from ground level by carrying through the swinging movements of the piston~cylinder device 4 and the stop abutment 44 by means of small hydralic cylinders controlled from ground level. Of course, the control device 38-42 will then likewise be located on ground level. A suitable guide means for bringing down each pipe onto the uppwardly pointing piston-cylinder device will then also be arranged.
Furthermore a retaining device 44 is described above and shown, which is par-ticularly suited for outer collars. At pipe lines with inner collars a clamping device for the tube including the collar can instead be used. This clamping device can e.g. be designed with jaws or similar which are abutted against the outside of the trailing end portion of the pipe. The jaws can be hydraulically operated.
It will be appreciated from the description above and the embodiment shown on the drawings that the invention makes possible use of an apparatus for relining without requiring any extra operations, such as excavating works in connection with the manhole or along the pipe line. Above all this is obtained by the illustrated design where a pipe pushed forward by the apparatus during the pushing forward movement surrounds the pushing piston, which minimizes the length of the apparatus.
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Claims (6)
1. Apparatus for pushing pipes along a duct, said apparatus being arranged to be positioned in association with the duct, and including a pushing piston which is arranged to exert a forward pushing force on a pipe with support of a holding-up device, and a tube supporting device for carrying the pipe around the pushing piston during movement of the later, characterized in that the holding-up device comprises an elongated support, means are arranged for supporting the pushing piston on said elongated support so as to be movable between an operative position in which the piston is ready for pushing a pipe in the direction of the duct, and a pipe receiving position deviating from said operative position, and means are arranged for carrying at the leading end of said elongated support a pipe retaining device for holding the trailing end portion of a previously pushed forward pipe, while performing a connecting stroke with the piston for connecting a pipe, carried around the piston, with said previously pushed forward pipe.
2. Apparatus according to claim 1, characterized in that the pipe retaining device includes an arcuate abutment for retain-ing a collar attached to said trailing end portion of said pre-viously pushed forward pipe, said arcuate abutment being swingably supported at said one end of said elongated support.
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- 8a - 69520-19
3. Apparatus according to claim 1, characterised in that the pushing piston at its leading end carries struts extending essentially to the trailing end of the pushing piston, where said struts carry a pressure abutment for bringing the pipe with it during forward stroke of the piston.
4. Apparatus according to any one of claim 1, 2 or 3, characterized in that the pushing piston is swingably supported at said one end of said elongated support for movement between said operative position and an essentially upwardly directed pipe receiving position.
5. Apparatus according to any one of claims 1, 2 or 3, in which the pushing piston forms part of a pressure fluid operated device, comprising a fluid pump assembly, characterized in that a control device for the operating movements of the piston is connected to the cylinder and the pump assembly and located for use near the apparatus, preferably attached thereto.
6. A method for pushing forward a pipe along a duct, comprising feeding the pipes to the duct and successively pushing forward them by means of a pushing piston, characterized by exerting the action of the piston on each pipe after ithaving been positioned around the pressure piston when the later takes a posi-tion deviating from the pushing direction thereof, and performing, before the pushing forward operation proper, a connecting stroke by the piston for connect-ing the pipe carried around the piston with the trailing end portion of a previously pushed forward pipe.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8803096-0 | 1988-09-05 | ||
| SE8803096A SE461748B (en) | 1988-09-05 | 1988-09-05 | Apparatus and method for advancing pipes in relining |
| SE8902783-3 | 1989-08-21 | ||
| SE8902783A SE8902783D0 (en) | 1988-09-05 | 1989-08-21 | DEVICE FOR PRESSURE OF RODS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1303602C true CA1303602C (en) | 1992-06-16 |
Family
ID=26660290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000610157A Expired - Lifetime CA1303602C (en) | 1988-09-05 | 1989-09-01 | Method and an apparatus for pushing pipes along a pipe line |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0434712B1 (en) |
| AU (1) | AU4203589A (en) |
| CA (1) | CA1303602C (en) |
| DE (1) | DE68922111T2 (en) |
| DK (1) | DK36591A (en) |
| FI (1) | FI98243B (en) |
| NO (1) | NO301441B1 (en) |
| SE (1) | SE8902783D0 (en) |
| WO (1) | WO1990002903A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO301435B1 (en) * | 1995-10-20 | 1997-10-27 | Tom Toralv Roeynestad | Device at drilling rig with drill tower |
| GB2484141A (en) * | 2010-10-01 | 2012-04-04 | Dyno Rod Ltd | Renewal of Drainage Infrastructure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830548A (en) * | 1954-03-08 | 1958-04-15 | Mcelvany James Leon | Pipe-laying method |
| DE2241695C3 (en) * | 1972-08-24 | 1978-06-01 | Gewerkschaft Eisenhuette Westfalia, 4670 Luenen | Pre-press device for pipe pre-press operation |
| AR205935A1 (en) * | 1975-02-06 | 1976-06-15 | Gewerk Eisenhuette Westfalia | IMPROVEMENTS IN TUBE PRESSING DEVICES |
| US4299375A (en) * | 1978-10-16 | 1981-11-10 | Schosek William O | Underground pipe installing device |
| DE3121426A1 (en) * | 1981-05-29 | 1982-12-23 | Fritz 8150 Holzkirchen Bichler | Pipe-socket press for laying sewer pipes |
| FR2607531B1 (en) * | 1986-12-02 | 1989-02-24 | Delbaere Gilles | SOIL DRILLING DEVICE ACTING ON A SUBSTANTIALLY HORIZONTAL AXIS |
-
1989
- 1989-08-21 SE SE8902783A patent/SE8902783D0/en unknown
- 1989-08-31 WO PCT/SE1989/000457 patent/WO1990002903A1/en active IP Right Grant
- 1989-08-31 AU AU42035/89A patent/AU4203589A/en not_active Abandoned
- 1989-08-31 DE DE68922111T patent/DE68922111T2/en not_active Expired - Fee Related
- 1989-08-31 EP EP89909890A patent/EP0434712B1/en not_active Expired - Lifetime
- 1989-09-01 CA CA000610157A patent/CA1303602C/en not_active Expired - Lifetime
-
1991
- 1991-02-20 NO NO910674A patent/NO301441B1/en not_active IP Right Cessation
- 1991-02-28 FI FI911024A patent/FI98243B/en active
- 1991-03-01 DK DK036591A patent/DK36591A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| EP0434712B1 (en) | 1995-04-05 |
| DE68922111T2 (en) | 1995-11-30 |
| SE8902783D0 (en) | 1989-08-21 |
| NO301441B1 (en) | 1997-10-27 |
| EP0434712A1 (en) | 1991-07-03 |
| DK36591D0 (en) | 1991-03-01 |
| NO910674D0 (en) | 1991-02-20 |
| NO910674L (en) | 1991-02-20 |
| FI911024A0 (en) | 1991-02-28 |
| WO1990002903A1 (en) | 1990-03-22 |
| DE68922111D1 (en) | 1995-05-11 |
| DK36591A (en) | 1991-03-01 |
| FI98243B (en) | 1997-01-31 |
| AU4203589A (en) | 1990-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |