WO2015188218A1

WO2015188218A1 - Flow control assembly

Info

Publication number: WO2015188218A1
Application number: PCT/AU2015/000343
Authority: WO
Inventors: Jeremy Palmer; Dean HARTY
Original assignee: Quattro Project Engineering Pty Ltd
Priority date: 2014-06-09
Filing date: 2015-06-09
Publication date: 2015-12-17

Abstract

The present invention provides a flow control assembly (11) for controlling the flow of a fluid. The flow control assembly comprising an inlet (19), a pipe (15) having a first end (17) secured to the inlet and a second end (21) secured to a body (23). The body is movable such that the second end of the pipe aligns with one of four stations. The four stations comprising a first outlet (30a), a second outlet (30b), a third outlet (30c) and an isolating station. The flow control assembly also comprises an activation means (49) for moving the body relative to the first outlet, the second outlet, the third outlet, or the isolating station, wherein the body is movable between the first outlet, the second outlet, the third outlet, or the isolating station while the fluid is being delivered to the flow control assembly.

Description

Flow Control Assembly

TECHNICAL FIELD

[0001] The present invention generally relates to a flow control assembly. In particular the invention relates to a flow control assembly for controlling the flow of a fluid, such as a slurry or paste, relative to a selection of outlets.

BACKGROUND ART

[0002] Various devices are used in numerous industries for regulating and managing the flow of a fluid. These devices may be used to stop fluid, divert fluid or re-circulate fluid within a fluid line.

[0003] In underground mining a series of shafts are constructed to provide access to the ore body, provide means to transport operators and equipment to the ore body, provide utilities, provide a means to extract the ore once mined, and provide access for further exploration. It is critical to the safety and integrity of the mine that once the ore body has been removed, the stopes left behind are structurally sound. To ensure this is the case the stopes are typically backfilled. This involves pumping a slurry mixture from the surface to the stope to fill the void. This type of mining is typically referred to as stope and fill mining.

[0004] Stope and fill mining involves delivering a slurry of tailings and cement to backfill a stope using either gravity or a pump located at the surface. The slurry is delivered through a primary pipe which passes through the main shaft of the mine. The main shaft has several access shafts extending therefrom which typically lead to the ore body. Each access shaft has a secondary pipe which can be connected to the primary pipe for delivering the slurry directly to the stope. Currently the process of connecting a secondary pipe to a primary pipe is a manual, labour intensive process. Furthermore, these pipes are typically suspended making it a difficult and dangerous process for an operator.

[0005] The process of backfilling a stope is very basic. Even though mines have increased in depth the backfill process has not changed. Currently if the delivery of the slurry needs to be stopped, as may be the case if there is a leak or a blockage in the system, the team will need to stop the pump or backfill plant operation in order to stop the flow of the slurry. Once the slurry has stopped, an operator will need to drive to the surface and isolate the reticulation/distribution system prior to the team commencing any repair works. The time taken to reach and isolate the system means that a large quantity of slurry may have leaked from the system, and/or the pressure build up due to the blockage may lead to additional failures within the system. The depth of the mine further compounds this issue, as the slurry in the pipe downstream of the pump will still be delivered even though the pump or backfill plant has stopped. As it is not economical to provide infrastructure to pump the slurry back to the surface the mine incorporates slurry pits at strategic places in the mine where the slurry can be dumped without impeding the operation of the mine.

[0006] In the case of a blockage, once the pump or backfill plant has stopped, the blockage will need to be located. This typically requires the entire contents of the pipe(s) downstream from the pump or backfill plant to be flushed. Again the depth of the mine compounds this problem. The excess slurry is again dumped into the slurry pits.

[0007] The preceding discussion of the background art is intended to facilitate an understanding of the present invention only. The discussion is not an acknowledgement or admission that any of the material referred to is or was part of the common general knowledge as at the priority date of the application.

SUMMARY OF INVENTION

[0008] It is an object of this invention to provide a flow control assembly which ameliorates, mitigates or overcomes, at least one disadvantage of the prior art, or which will at least provide the public with a practical choice.

[0009] The present invention provides a flow control assembly for controlling the flow of a fluid, the flow control assembly comprising: an inlet; a pipe having a first end secured to the inlet and a second end secured to a body, the body being movable such that the second end of the pipe aligns with one of four stations, the four stations comprising a first outlet, a second outlet, a third outlet, and an isolating station; an activation means for moving the body relative to the first outlet, the second outlet, the third outlet, or the isolating station; wherein the body is movable between the first outlet, the second outlet, the third outlet, or the isolating station while the fluid is being delivered to the flow control assembly.

[0010] The present invention provides a flow control assembly for controlling the flow of a fluid, the flow control assembly comprising: an inlet; at least two stations; a pipe having a first end secured to the inlet and a second end secured to a body, the body being movable such that the second end of the pipe aligns with one of the at least two stations; an activation means for moving the body relative to the at least two stations; wherein the body is movable between the at least two stations while the fluid is being delivered to the flow control assembly.

[001 1] The control flow assembly allows the body to be moved between stations while the assembly still has fluid being delivered thereto. Hence there is no requirement to stop the delivery of the fluid before aligning the pipe with one of the other at least two stations. This saves significant time while providing a reliable assembly which enables better control of the flow of the fluid.

[0012] In one aspect of the invention the first end of the pipe is rotatably secured to the inlet. [0013] In another aspect of the invention the second end of the pipe is rotatably secured to the body.

[0014] The second end of the pipe may be sealingly secured to the body.

[0015] At least one of the at least two stations may provide an outlet which allows the fluid to pass through the flow control assembly.

[0016] The at least two stations may comprise at least one outlet.

[0017] Preferably there are four stations, the four stations comprising a first outlet, a second outlet, a third outlet, and an isolating station.

[0018] The flow control assembly may comprise a mounting frame to which its components are mounted.

[0019] In one aspect of the invention the body is slidably mounted with respect to the stations, whereupon sliding of the body the second end of the pipe aligns with a different station.

[0020] In another aspect of the invention the body is rotatably mounted with respect to the stations, whereupon rotation of the body the second end of the pipe aligns with a different station. The body may be in the form of a segment, turntable or carousel.

[0021] The body may move back and forth between stations or may rotate in one direction to index between stations.

[0022] The activation means for moving the body may comprise a drive mechanism coupled to the body. The drive mechanism may be operated hydraulically, pneumatically, manually or by an electric motor. Once activated the drive mechanism may index the body to the next station.

[0023] The flow control assembly may comprise a locking means to releasably lock the body relative to the stations. The locking means may comprise a pin which extends to lock the body in place and retracts to allow the body to move. The locking means may be manually or automatically operated. The locking means may be in the form of a solenoid. The locking means may automatically unlock the body as the first step in each movement sequence.

[0024] In one aspect of the invention each station is incorporated in an end plate. The end plate may be incorporated in the mounting frame.

[0025] In another aspect of the invention each station may be incorporated in the mounting frame.

[0026] At least one of the stations may provide an outlet through which fluid may pass through the flow control assembly.

[0027] At least one of the other stations may provide an isolating station to block the flow of fluid. When the second end of the pipe aligns with the isolating station the fluid is prevented from passing through the flow control assembly isolating the pipe downstream from the flow control assembly.

[0028] The end plate may comprise an opening for each outlet. For example, when the end plate has four stations, with one of those stations being an isolating station and each of the remaining three stations being outlets, the end plate would have three openings.

[0029] Each outlet may be sealingly secured to the end plate. Each outlet may be removable from the end plate.

[0030] A first end of each opening may be adapted to abut the body while a second end is adapted to receive an outlet.

[0031] The first end of the opening may incorporate a shoulder such that the diameter of the first end is smaller than the diameter of the second end.

[0032] The opening may receive a ring which, when in place, abuts the shoulder such that a first end of the ring is adjacent the first end of the opening. Preferably the first end of the ring is flush with the end plate when positioned therein.

[0033] In one aspect of the invention a seal is receivable in the opening to abut a second end of the ring. The second end of the ring may have a recess or groove therein for accommodating a portion of the seal. [0034] In another aspect of the invention a seal is receivable in the opening to abut the shoulder. The shoulder may have a recess or groove therein for accommodating a portion of the seal.

[0035] Each outlet may be releasably mounted to its respective opening in the end plate.

[0036] In one aspect of the invention each outlet may comprise a passage through which the fluid may pass and a flange for securing the passage to the end plate. A portion of a first end of the passage may extend outwardly/proud from the flange. The portion of the first end of the passage may be received in the opening of the end plate through the second end of the opening. When in position the portion of the first end of the passage may engage the seal such that when the outlet is secured to the end plate the outlet is sealingly secured thereto. The first end of the passage may compress the seal against the ring.

[0037] In another aspect of the invention each outlet may comprise a pipe section comprising a passage through which the fluid may pass and having an externally threaded first end for securing the pipe end to the end plate wherein each opening has a corresponding threaded internal surface. When the pipe section is threadingly received in the opening the first end of the pipe section may engage the seal such that when the outlet is secured to the end plate the outlet is sealingly secured thereto. The first end of the passage may compress the seal against the ring.

[0038] The body may abut the end plate. The body may be movably retained relative to the end plate. The body may have an opening therein to which the second end of the pipe may be releasably secured.

[0039] A first end of the opening in the body may be adapted to abut the end plate while a second end is adapted to receive the second end of the pipe.

[0040] The first end of the opening may incorporate a shoulder such that the diameter of the first end is smaller than the diameter of the second end. [0041] The opening may receive a ring such that a first end of the ring is positioned to be adjacent the first end of the opening. Preferably the first end of the ring is flush with the body when positioned therein.

[0042] In one aspect of the invention a seal is receivable in the opening to abut a second end of the ring. The second end of the ring may have a recess or groove therein for accommodating a portion of the seal.

[0043] In another aspect of the invention a seal is receivable in the opening to abut the shoulder. The shoulder may have a recess or groove therein for accommodating a portion of the seal.

[0044] The second end of the pipe may be sealingly secured to the body wherein the second end of the pipe is removable.

[0045] The second end of the pipe may comprise a passage through which the fluid may pass and a flange for securing the passage to the body. A portion of a first end of the passage may extend outwardly/proud from the flange. The portion of the first end of the passage may be received in the opening of the body through the second end of the opening. When in position the portion of the first end of the passage may engage the seal such that when the second end of the pipe is secured to the body the second end of the pipe is sealingly secured thereto. The first end of the passage may compress the seal against the ring.

[0046] The arrangement to seal the outlet relative to the end plate is identical to the sealing arrangement of the second end of the pipe relative to the body. In both arrangements the seal is retained in a compressed state. This allows the flow control assembly to seal the moving parts of the flow control assembly when operating at high pressures without leakage, or at least with minimal leakage.

[0047] The inlet may be retained relative to the mounting frame. The first end of the pipe may be releasably secured to the inlet.

[0048] The second end of the pipe may be rotatable relative to the inlet.

[0049] The mounting frame may allow the flow control assembly to be mounted in a suspended arrangement. [0050] The body may incorporate a plurality of lubrication grooves such that the interface between the end plate and the body may be regularly lubricated.

[0051] The body may incorporate a connector extending therefrom. The connector may be adapted to receive a supply line for supplying a further fluid such as water or air. The connector may be secured to the body in a similar manner as the pipe. Once a supply line is connected to the connector, and the connector aligns with an outlet, the fluid supplied through the supply line can be used to flush out the system downstream from the outlet the connector is aligned.

[0052] The present invention further provides a fluid delivery system for delivering a fluid, such as a slurry, to a destination, such as a stope or a tailings storage facility, the system comprises: a delivery means to deliver the fluid from a fluid reservoir; a primary pipe for delivering the slurry to at least one secondary pipe which delivers fluid to the destination; at least one flow control assembly as hereinbefore described positioned between the primary pipe and the secondary pipe such that the primary pipe upstream from the flow control assembly is connected to the inlet and the secondary pipe is connected to a first outlet; wherein during operation the flow control assembly is set such that fluid entering the inlet is diverted to the first outlet.

[0053] The delivery means may be in the form of a pump or a system which relies upon gravity.

[0054] A downstream primary pipe positioned downstream from the at least one flow control assembly may be connected to a second outlet.

[0055] Preferably the primary pipe incorporates a plurality of flow control assemblies therealong, wherein the plurality of pumps are connected to further secondary pipes. [0056] Preferably the secondary pipe incorporates a plurality of flow control assemblies therealong. There may be more than one secondary pipe.

[0057] The present invention further provides a system for delivering a fluid to one or more destination, the system comprises a first pipe for supplying the fluid from a fluid supply to a flow control assembly, the flow control assembly being as hereinbefore described, wherein the flow control assembly has one station connected to a second pipe, the second pipe delivering the fluid to a first destination.

[0058] The flow control assembly may have a further station connected to a third pipe, the third pipe delivering the fluid to a second destination.

[0059] The flow control assembly may have a further station connected to a fourth pipe, the fourth pipe delivering the fluid to a third destination.

[0060] The flow control assembly may have a further station which is blocked to allow for the flow control assembly to be isolated, preventing fluid from passing through the flow control assembly.

[0061] The destinations may be a further flow control assembly as hereinbefore described, a stope or a fluid sump.

[0062] The present invention further provides a method for delivering a settable slurry to a stope, the stope being located in an underground mine comprising at least one primary pipe extending from the surface along a main shaft, and a plurality of secondary pipes branching off from the primary pipe and extending along shafts extending from the main shaft, a flow control assembly as hereinbefore described being located where each secondary pipe branches from the primary pipe, the method comprising: delivering the slurry at the surface into the primary pipe; indexing the body of the flow control assembly such that the second end of the pipe aligns with an outlet having the secondary pipe connected thereto; filling the stope with the slurry. [0063] The method may further comprise rotating the body such that the second end of the pipe aligns with a further outlet wherein the further outlet is connected to a further secondary pipe extending to a further stope, allowing the slurry to be delivered to the further stope.

[0064] The method may further comprise rotating the body such that the second end of the pipe aligns with still a further outlet wherein the still further outlet is connected to a dumping pipe for dumping the slurry into a slurry sump.

[0065] The method may further comprise rotating the body such that the second end of the pipe aligns with the isolating station, blocking the flow of slurry.

[0066] The present invention provides a flow control assembly for diverting the flow of a fluid between at least two pipelines, the flow control assembly comprising: an inlet; at least two stations, each being in fluid communication with a respective pipeline of the at least two pipelines, each station being sealingly secured to an end plate; a pipe having a first end secured to the inlet and a second end sealingly secured to a body, the body abutting such that a surface of the body matingly engages a surface of the end plate, the end plate and being rotatably movable relative thereto, whereupon rotation of the body the second end of the pipe aligns with one of the other at least two stations; an activation means for moving the body relative to the at least two stations; wherein the body is movable between the at least two stations whereby the second end of the pipe is caused to align with one of the other at least two stations, whereby the fluid continues to be delivered to the flow control assembly.

[0067] The flow control assembly has been described in relation to a fluid being delivered to the inlet of the flow control assembly wherein the flow control assembly can be arranged such that the fluid is either blocked from passing through the flow control assembly, or can be diverted to any number of outlets. However, it is also to be understood that the flow control assembly may be used in reversed orientation whereby the fluid is delivered to the flow control assembly in reverse flow direction. In such an arrangement each outlet is supplied with a fluid, once the particular outlet is aligned with the pipe the fluid in that outlet is able to exit the flow control assembly through the inlet. Such an arrangement is considered to be within the scope of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Further features of the present invention are more fully described in the following description of several embodiments thereof. This description is included solely for the purposes of exemplifying the present invention. It should not be understood as a restriction on the broad summary, disclosure or description of the invention as set out above. The description will be made with reference to the accompanying drawings in which:

Figure 1 is a front perspective view of a flow control assembly according to a first embodiment of the invention;

Figure 2 is a rear perspective view of the flow control assembly shown in figure 1 ;

Figure 3 is a plan view of the flow control assembly shown in figure 1 ;

Figure 4 is a left hand end view of the flow control assembly shown in figure 1 ;

Figure 5 is a cross sectional view of the flow control assembly taken along line AA in figure 4;

Figure 6 is a sectional view of section C shown in figure 5;

Figure 7 a, b, c, d is a set of rear perspective and plan views of the flow control assembly shown in figure 1 with a second end of a pipe positioned at its different stations;

Figure 8 is a front perspective view of a flow control assembly according to a second embodiment of the invention; Figure 9 is a front view of the flow control assembly shown in figure 8;

Figure 10 is a side view of the flow control assembly shown in figure 8; and

Figure 1 1 is a plan view of the flow control assembly shown in figure 8.

[0069] In the drawings like structures are referred to by like numerals throughout the several views. The drawings shown are not necessarily to scale, with emphasis instead generally being placed upon illustrating the principles of the present invention.

DESCRIPTION OF EMBODIMENTS

[0070] In underground mining it is necessary to support the voids/stopes formed as the ore is taken away. One solution is to leave pillars of ore in place to provide the requisite support. However, this means that a portion of the valuable ore must remain in place. Another solution is to remove all the ore and backfill the stope with a settable slurry, such as tailings mixed with cement.

[0071] In the latter of these solutions a system of pipes are installed within the mine to distribute the slurry to the stope. The system usually comprises a primary pipe extending through the main shaft of the mine from a pump generally located at the surface. One or more secondary pipes then branch off the main shaft and extend along access shafts which lead to the stope. The system also comprises a plurality of slurry sumps strategically placed within the mine. The slurry sumps are adapted to receive and hold a portion of slurry when the slurry needs to be flushed from the system.

[0072] A first embodiment of the present invention provides a flow control assembly 1 1 which is adapted to be positioned where each or several secondary pipe branches from the primary pipe. In alternative embodiments the flow control assembly can also be positioned at various places in the system.

[0073] The flow control assembly 1 1 of the first embodiment of the present invention is now described with reference to figures 1 to 6.

[0074] The flow control assembly 1 1 comprises a mounting frame 13. The mounting frame 13 enables the flow control assembly to be assembled in the factory, transported to the mine and installed in position without requiring any further assembling. The mounting frame also allows robust installation and enables the flow control assembly to be mounted in a suspended position so that the flow control assembly does not inhibit the operation of the mine.

[0075] The flow control assembly comprises a pipe 15 having a first end 17 connected to an inlet 19 and a second end 21 connected to a body, which in this embodiment is in the form of a turntable 23. The pipe 15 is in an S-shape and is mounted such that the second end 21 may rotate relative to the inlet 19. In an alternative embodiment the pipe 15 rotates relative to an end plate 25.

[0076] The first end 17 of the pipe 15 is coupled to the inlet using a coupling clamp 24. The coupling clamp 24 rotatably clamps the pipe 15 to the inlet 19.

[0077] The flow control assembly 1 1 also comprises an end plate 25 which is fixed to the mounting frame. In alternative embodiments the end plate forms part of the mounting frame. The end plate 25 has three openings 26 therein, each opening 26 having a first end 27 and a second end 28. As best shown in figure 6 the first end 27 incorporates a shoulder 29 causing the first end 27 to have a reduced internal diameter compared with the second end 28 of the opening 26.

[0078] Each opening 26 receives a ring 41 which is inserted through the second end 28 of the opening 26 and abuts the shoulder 29 such that an end of the ring 41 is flush with the first end 27 of the opening 26.

[0079] Once the ring 41 is in position a seal 43 is placed in the opening 26 for reasons which will be discussed below.

[0080] Each opening 26 has an outlet 30 secured thereto, as best shown in figure 1 .

[0081] Each outlet 30 comprises a passage 31 through which the slurry may pass, a first flange 33 adjacent a first end 35 of the passage 31 , and a second flange 37 at the second end 39 of the passage. The first flange 33 secures the passage 31 to the end plate 25 while the second flange 37 is adapted to be connected to a pipe (not shown) such as a secondary pipe of a dumping pipe. [0082] As shown in figure 6, a portion 36 of the first end 35 of the passage 31 extends outwardly from/proud of the first flange 33. This portion 36 of the first end 35 is received in the second end 28 of the opening 26 and extends sufficiently into the opening 26 such that it engages the seal 43. As the outlet 30 is secured to the end plate 25 a compressive force is exerted on the seal 43. The seal 43 is then retained in an annular recess 45 formed by the ring 41 and the portion 36 of the first end 35 of the passage 31 .

[0083] As also noted in figure 6, the second end 21 of the pipe 15 is secured to the turntable 23 in an identical manner to the connection of each outlet 30 to its respective opening 26. As a result, each outlet 30 has two seals 43, one associated with the second end 21 of the pipe 15 and the other associated with opening 26 in the end plate 25. Furthermore each seal 43 is in compression, ensuring the seal 43 is able to operate at significantly higher pressures. When the fluid passing through the flow control assembly is a slurry, the fines suspended therein tend to accumulate in the seal and assist in the sealing process.

[0084] In an alternative embodiment the outlet is formed from a pipe section having a threaded end. The threaded end is received in the opening which is also threaded such that the pipe section is threadingly received in the opening. The other end of the pipe section may be threaded or have some other form of connection means to connect the pipe section to the pipe system.

[0085] As best shown in figure 2, the turntable 23 is rotatably retained relative to the end plate 25 using four clamps 47. In the present embodiment the turntable 23 may be rotated such that the second end 21 of the pipe 15 is indexed between four stations. Three of these four stations align with one of the three openings 26 in the end plate 25 and its associated outlet 30. The fourth station is an isolating station such that when the second end 21 of the pipe 15 aligns with the fourth station the end plate 25 blocks the flow of fluid through the second end 21 of the pipe 15 thus isolating the flow control assembly 1 1 and preventing further slurry being transported downstream therefrom.

[0086] The flow control assembly 1 1 also comprises an activation means in the form of a electric motor 49 for rotating the turntable 23 between the stations. [0087] The flow control assembly 1 1 also comprises a locking means in the form of a pin 51 which is controlled by a solenoid. The solenoid is secured on the end plate 25. Once the turntable 23 has been rotated to the required station the solenoid is activated causing the pin 51 to move inwardly engaging a recess in the turntable 23 to lock the turntable 23 relative to the end plate 25. Before the turntable 23 may be rotated the pin 51 will need to be retracted.

[0088] The flow control assembly 1 1 is adapted to be placed in strategic positions within the pipe system. The inlet 19 of the flow control assembly 1 1 is connected to a pipe through which the slurry is pumped, such as the primary pipe. One of the outlets 30a is connected to a first pipe such as a secondary pipe for delivering fluid to a first stope, while one of the other outlets 30b is connected to a second pipe such as a different secondary pipe for delivering fluid to a second stope. The final outlet 30c may be connected to a dumping pipe for dumping the slurry into a slurry sump.

[0089] The operation of the flow control assembly is now described with reference to figures 7 (a) to (d). During normal operation the flow control assembly 1 1 is arranged such that the second end 21 of the pipe 15 aligns with the outlet 30a which is in fluid communication with the secondary pipe (not shown) for delivering the slurry to the first stope, as shown in figure 7a. When a pump at the surface is activated, the slurry starts to flow and is delivered to the flow control assembly 1 1 . The slurry passes through the inlet 19, through the pipe 15 and is discharged from the flow control assembly 11 through the outlet 30a. The slurry then flows to the first stope.

[0090] When sufficient slurry has passed to the first stope the electric motor 49 is activated and the pin 51 retracted, allowing the turntable 23 to be rotated so that the second end 21 of the pipe 15 now aligns with the outlet 30b which is in fluid communication with another secondary pipe (not shown) for delivering the slurry to the second stope, as shown in figure 7b. Owing to the construction of the flow control assembly 1 1 the turntable 23 can be rotated without having to stop the delivery of the slurry to the flow control assembly 1 1 . The manner in which the seals 43 are installed allow the flow control assembly 1 1 to operate and to transition between outlets with no or minimal leakage. [0091] Once sufficient slurry has been pumped the pump at the surface is deactivated. The system then needs to be flushed otherwise the slurry will set in situ. In order to flush the system of slurry the electric motor 49 is activated and the pin 51 retracted, allowing the turntable 23 to be rotated such that the second end 21 of the pipe 15 aligns with the outlet 30c which is in fluid communication with a dumping pipe (not shown) for delivering the slurry to a slurry sump, as shown in figure 7c. The system may then be flushed.

[0092] During operation it is not unusual for the system to develop a blockage. This can occur anywhere within the system. When a blockage occurs the flow control assembly 1 1 upstream from the blockage can be arranged such that the second end 21 of the pipe 15 aligns with the isolating station, as shown in figure 7d. This stops the flow of slurry into the blocked area without having to stop the pump at the surface. The flow control assembly 1 1 downstream of the blockage can be arranged such that the second end 21 of the pipe 15 aligns with the outlet 30c which is in fluid communication with a dumping pipe. The slurry in the blocked region can then be dumped into the slurry sump. Once the blockage has been removed the flow control assemblies may return to the desired arrangement and normal operation can resume. This can be achieved without having to return to the surface and stop the pump, and also prevents excessive wastage of slurry.

[0093] In the event the position of the blockage is unknown, flow control assemblies 1 1 may be successively blocked and dumped until the blockage is located and cleared. This obviates the need to completely dump the contents of the pipe in order to clear the pipe.

[0094] Some installations also comprise a device to induce a pressure head which can be used to clear a blockage. Using flow control assemblies of the present invention within the pipe system eliminates the need to install such a device in the pipe system, as the flow control assemblies allow for sections of the pipe to be opening and dumped.

[0095] A flow control assembly 1 1 1 according to a second embodiment of the invention is illustrated in figures 8 to 1 1 . For convenience features of the second embodiment that are similar or correspond to features of the flow control assembly 1 1 of the first embodiment have been referenced with the same reference numerals.

[0096] The flow control assembly 1 1 1 comprises a mounting frame 113 which is designed to allow the flow control assembly 1 1 1 to be installed in a suspended orientation.

[0097] The flow control assembly 1 1 1 comprises a pipe 15 having a first end 17 connected to an inlet 19 using a coupling clamp 24. The coupling clamp 24 rotatably clamps the pipe 15 to the inlet 19. The inlet may be provided by a pipe (not shown) for delivering the slurry, or alternatively the inlet 19 may be connected to the pipe (not shown) for delivering the slurry.

[0098] A second end 21 of the pipe 15 is connected to a body, which in this embodiment is in the form of a segment 123. The pipe 15 is in an S-shape and is mounted such that the second end 21 may rotate relative to the inlet 19. In an alternative embodiment the pipe 15 rotates relative to an end plate 125.

[0099] The flow control assembly 1 1 1 also comprises an end plate 125 which is fixed to the mounting frame. The end plate 125 has two openings 126 therein, each correlating to a station. Each opening 126 has an outlet 130 secured thereto, wherein the connection therebetween is identical to the manner in which the outlet 130 of the first embodiment is secured to the end plate 25.

[00100] Similarly the second end 21 of the pipe 15 is secured to the segment 123 in an identical manner to the connection of each outlet 130 to its respective opening 126. As a result, each outlet 130 has two seals, one associated with the second end 21 of the pipe 15 and the segment 123, and the other associated with opening 26 in the end plate 125.

[00101] In this embodiment the segment 123 is movable by an activation means which is in the form of a hydraulic piston 149. The segment 123 is movable between a first position wherein the second end 21 of the pipe 15 aligns with a first outlet 130a, and a second position wherein the second end 21 of the pipe 15 aligns with a second outlet 130b. Therefore in this embodiment the segment 123 rotates back and forth between the two positions. In alternative embodiments the body may take any shape, such as a square or rectangular plate. [00102] The flow control assembly 1 11 of this embodiment can be connected along the length of the pipe, with the first outlet 130a connected to a first secondary pipe for delivering the slurry to a first stope and the second outlet 130b connected to a second secondary pipe for delivering the slurry to a second stope. This configuration may be useful at the end of the primary pipe.

[00103] Alternatively, the flow control assembly 1 11 of this embodiment can be connected along the length of the pipe, with the first outlet 130a connected to the pipe and the second outlet 130b connected to a dumping pipe for dumping the slurry into a slurry sump. This configuration may be useful where the pipe is long, allowing for parts of the pipe to be dumped should a blockage occur along its length.

[00104] In a further variation (not shown), the flow control assembly 11 1 may have a third station which is an isolating station. When the second end 21 of the pipe 15 aligns with the third station the end plate 125 blocks the flow of fluid through the second end 21 of the pipe 15 thus isolating the flow control assembly and preventing further slurry being transported downstream therefrom.

[00105] The flow control assembly 1 1 is pressure rated such that the turntable can be rotated under a full load of slurry. This saves significant time as the system does not need to be flushed of slurry before the pipes are rearranged so that the slurry can be diverted to another location.

[00106] To ensure the flow control assembly 1 1 is suitably rated the turntable 23 and end plate 25 are formed from suitably thick material such that any deflection experienced by the components when under pressure is not sufficient to cause any leakage of the slurry.

[00107] As the flow control assembly 1 1 operates in a very harsh environment and has a very abrasive pressurised material passing therethrough the components wear and will require replacement from time to time. The construction of the present flow control assembly is such that the majority of servicing can be done without having to remove the entire flow control assembly. For instance, an operator may easily remove each outlet 30 and replace the seal before the outlet is reconnected. [00108] Furthermore, any leakage of the slurry is visually identifiable. As such it is not necessary to disassemble the flow control assembly 1 1 in order to determine whether any components have worn and need replacing.

[00109] Another advantage of the present invention is that the arrangement of the flow control assembly 1 1 in relation to which station the slurry is flowing is visually identifiable. This can be critical in instances of power failure.

[00110] The flow control assembly 1 1 has been designed to ensure there are no dead areas within the flow control assembly 1 1 . As a result there are no spaces within the flow control assembly 1 1 which will allow the slurry to build up, and later set.

[0011 1] The flow control assembly also allows for quicker and easy flushing of the pipe. As the fluid flowing through the outlets is in the same direction as the fluid passing through the pipes and entering the flow control assembly, the flow control assembly allows for better flow, including when flushing the system, than compared to current devices which seek to redirect fluid flow into a different direction to that entering the device.

[00112] While the above embodiment is discussed in relation to delivering a slurry within an underground mine, the flow control assembly has numerous applications in other industries where a fluid must be diverted to various outlets, or the reverse. One such application includes the delivery of mining tailings to other areas, such as evaporation ponds. The present invention is not limited to the embodiment discussed herein.

[00113] The present invention also provides a flow control assembly which can reliably be controlled remotely. By incorporating various sensors within the pipe system/fluid delivery system, an operator working remotely can be alerted to any blockages, can activate the flow control assembly to the desired station and address the blockage before it creates an issue further downstream. Alternatively, such a system can be operated automatically when the pipe system/fluid delivery system experiences pre-set conditions.

[00114] Modifications and variations such as would be apparent to the skilled addressee are considered to fall within the scope of the present invention. The present invention is not to be limited in scope by any of the specific embodiments described herein. These embodiments are intended for the purpose of exemplification only. Functionally equivalent products, formulations and methods are clearly within the scope of the invention as described herein.

[00115] Reference to positional descriptions, such as lower and upper, are to be taken in context of the embodiments depicted in the figures, and are not to be taken as limiting the invention to the literal interpretation of the term but rather as would be understood by the skilled addressee.

[00116] Throughout this specification, unless the context requires otherwise, the word "comprise" or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

[00117] Also, future patent applications maybe filed in Australia or overseas on the basis of, or claiming priority from, the present application. It is to be understood that the following provisional claims are provided by way of example only, and are not intended to limit the scope of what may be claimed in any such future application. Features may be added to or omitted from the provisional claims at a later date so as to further define or re-define the invention or inventions.

Claims

1 . A flow control assembly for controlling the flow of a fluid, the flow control assembly comprising: an inlet; at least two stations; a pipe having a first end secured to the inlet and a second end secured to a body, the body being movable such that the second end of the pipe aligns with one of the at least two stations; an activation means for moving the body relative to the at least two stations; wherein the body is movable between the at least two stations while the fluid is being delivered to the flow control assembly.

2. The flow control assembly according to claim 1 wherein the first end of the pipe is rotatably secured to the inlet.

3. The flow control assembly according to claim 1 wherein the second end of the pipe is rotatably secured to the body.

4. The flow control assembly according to claim 1 , 2 or 3 wherein the second end of the pipe is sealingly secured to the body.

5. The flow control assembly according to any one of the preceding claims wherein at least one of the at least two stations provides an outlet.

6. The flow control assembly according to any one of claims 1 to 4 wherein there are four stations, the four stations comprising a first outlet, a second outlet, a third outlet, and an isolating station.

7. The flow control assembly according to any one of the preceding claims comprising a mounting frame to which its components are mounted.

8. The flow control assembly according to any one of the preceding claims wherein the body is slidably mounted with respect to the stations, whereupon sliding of the body the second end of the pipe aligns with a different station.

9. The flow control assembly according to any one of claims 1 to 7 wherein the body is rotatably mounted with respect to the stations, whereupon rotation of the body the second end of the pipe aligns with a different station.

10. The flow control assembly according to any one of the preceding claims wherein the activation means for moving the body comprises a drive mechanism coupled to the body.

1 1 . The flow control assembly according to any one of the preceding claims comprising a locking means to releasably lock the body relative to the stations.

12. The flow control assembly according to any one of the preceding claims wherein each station is incorporated in an end plate.

13. The flow control assembly according to claim 12 wherein the end plate is incorporated in the mounting frame.

14. The flow control assembly according to any one of the preceding claims wherein at least one of the stations provides an outlet through which fluid passes through the flow control assembly.

15. The flow control assembly according to claim 14 wherein at least one of the other stations provides an isolating station to block the flow of fluid through the flow control assembly.

16. The flow control assembly according to claim 12, 13, 14 or 15 wherein the end plate comprises an opening for each outlet.

17. The flow control assembly according to any one of claims 12 to 16 when dependent on claim 5 wherein each outlet is sealingly secured to the end plate.

18. The flow control assembly according to any one of claims 12 to 17 when dependent on claim 5 wherein each outlet is removable from the end plate.

19. The flow control assembly according to any one of claims 16 to 18 wherein a first end of each opening is adapted to abut the body while a second end is adapted to receive an outlet.

20. The flow control assembly according to claim 19 wherein the first end of the opening incorporates a shoulder such that the diameter of the first end is smaller than the diameter of the second end.

21 . The flow control assembly according to claim 20 wherein the opening receives a ring which, when in place, abuts the shoulder such that a first end of the ring is adjacent the first end of the opening.

22. The flow control assembly according to claim 21 wherein the first end of the ring is flush with the end plate when positioned therein.

23. The flow control assembly according to claim 21 or 22 wherein a seal is receivable in the opening to abut a second end of the ring.

24. The flow control assembly according to claim 23 wherein the second end of the ring has a recess or groove therein for accommodating a portion of the seal.

25. The flow control assembly according to claim 20 wherein a seal is receivable in the opening to abut the shoulder.

26. The flow control assembly according to claim 25 wherein the shoulder has a recess or groove therein for accommodating a portion of the seal.

27. The flow control assembly according to any one of claims 12 to 26 wherein each outlet comprises a passage through which the fluid passes, and a flange for securing the passage to the end plate.

28. The flow control assembly according to claim 27 wherein a portion of a first end of the passage extends outwardly/proud from the flange, the portion of the first end of the passage is received in the opening of the end plate through the second end of the opening, whereby when in position the portion of the first end of the passage engages the seal such that when the outlet is secured to the end plate the outlet is sealingly secured thereto, the first end of the passage compressing the seal against the ring.

29. The flow control assembly according to any one of claims 12 to 26 wherein each outlet comprise a pipe section comprising a passage through which the fluid passes, and having an externally threaded first end for securing the pipe end to the end plate wherein each opening has a corresponding threaded internal surface, whereupon the pipe section being threadingly received in the opening the first end of the pipe section engages the seal such that when the outlet is secured to the end plate the outlet is sealingly secured thereto, the first end of the passage compressing the seal against the ring.

30. The flow control assembly according to any one of claims 12 to 29 wherein body abuts the end plate, the body being movably retained relative to the end plate.

31 . The flow control assembly according to any one of the preceding claims wherein the body has an opening therein to which the second end of the pipe is releasably secured.

32. The flow control assembly according to claim 31 wherein a first end of the opening in the body is adapted to abut the end plate while a second end is adapted to receive the second end of the pipe.

33. The flow control assembly according to claim 32 wherein the first end of the opening incorporates a shoulder such that the diameter of the first end is smaller than the diameter of the second end.

34. The flow control assembly according to claim 31 , 32 or 33 wherein the opening receives a ring such that a first end of the ring is positioned to be adjacent the first end of the opening.

35. The flow control assembly according to claim 34 wherein the first end of the ring is flush with the body when positioned therein.

36. The flow control assembly according to claim 35 wherein a seal is receivable in the opening to abut a second end of the ring.

37. The flow control assembly according to claim 36 wherein the second end of the ring has a recess or groove therein for accommodating a portion of the seal.

38. The flow control assembly according to claim 33 wherein a seal is receivable in the opening to abut the shoulder.

39. The flow control assembly according to claim 38 wherein the shoulder has a recess or groove therein for accommodating a portion of the seal.

40. The flow control assembly according to any one of the preceding claims wherein second end of the pipe comprise a passage through which the fluid passes and a flange for securing the passage to the body.

41 . The flow control assembly according to claim 40 wherein a portion of a first end of the passage extends outwardly/proud from the flange, the portion of the first end of the passage is received in the opening of the body through the second end of the opening, whereby when in position the portion of the first end of the passage engages the seal such that when the second end of the pipe is secured to the body the second end of the pipe is sealingly secured thereto, the first end of the passage compressing the seal against the ring.

42. The flow control assembly according to any one of claims 7 to 41 wherein the inlet is retained relative to the mounting frame.

43. The flow control assembly according to claim 42 wherein the first end of the pipe is releasably secured to the inlet, and the second end of the pipe is rotatable relative to the inlet.

44. The flow control assembly according to any one of the preceding claims wherein the body incorporates a plurality of lubrication grooves such that the interface between the end plate and the body is regularly lubricated.

45. The flow control assembly according to any one of the preceding claims wherein the body incorporates a connector extending therefrom, the connector is adapted to receive a supply line for supplying a further fluid.

46. A fluid delivery system for delivering a fluid, such as a slurry, to a destination, such as a stope or a tailings storage facility, the system comprises: a delivery means to deliver the fluid from a fluid reservoir; a primary pipe for delivering the slurry to at least one secondary pipe which delivers fluid to the destination; a flow control assembly according to any one of the preceding claims positioned between the primary pipe and the secondary pipe such that the primary pipe upstream from the flow control assembly is connected to the inlet and the secondary pipe is connected to a first outlet; wherein during operation the flow control assembly is set such that fluid entering the inlet is diverted to the first outlet.

47. The fluid delivery system according to claim 46 wherein the delivery means is in the form of a pump or a system which relies upon gravity.

48. The fluid delivery system according to claim 46 or 47 wherein a downstream primary pipe positioned downstream from the at least one flow control assembly is connected to a second outlet.

49. The fluid delivery system according to claims 46, 47 or 48 wherein the primary pipe incorporates a plurality of flow control assemblies therealong, wherein the plurality of pumps are connected to further secondary pipes.

50. The fluid delivery system according to any one of claims 46 to 49 wherein the secondary pipe incorporates a plurality of flow control assemblies therealong. .

51 .A system for delivering a fluid to one or more destinations, the system comprises a first pipe for supplying the fluid from a fluid supply to a flow control assembly, the flow control assembly according to any one of claims 1 to 45, wherein the flow control assembly has one station connected to a second pipe, the second pipe delivering the fluid to a first destination.

52. The system for delivering a fluid according to claim 51 wherein the flow control assembly has a further station connected to a third pipe, the third pipe delivering the fluid to a second destination.

53. The system for delivering a fluid according to claim 51 or 52 wherein the flow control assembly has a further station connected to a fourth pipe, the fourth pipe delivering the fluid to a third destination.

54. The system for delivering a fluid according to claim 51 , 52 or 53 wherein the flow control assembly has a further station which is blocked to allow for the flow control assembly to be isolated, preventing fluid from passing through the flow control assembly.

55. The system for delivering a fluid according to claim 51 , 52, 53 or 54 wherein the destinations include a flow control assembly, a stope or a fluid sump.

56. A method for delivering a settable slurry to a stope, the stope being located in an underground mine comprising at least one primary pipe extending from the surface along a main shaft, and a plurality of secondary pipes branching off from the primary pipe and extending along shafts extending from the main shaft, a flow control assembly according to any one of claims 1 to 45 being located where each secondary pipe branches from the primary pipe, the method comprising: delivering the slurry at the surface into the primary pipe; indexing the body of the flow control assembly such that the second end of the pipe aligns with an outlet having the secondary pipe connected thereto; filling the stope with the slurry.

57. The method according to claim 56 further comprising rotating the body such that the second end of the pipe aligns with a further outlet wherein the further outlet is connected to a further secondary pipe extending to a further stope, allowing the slurry to be delivered to the further stope.

58. The method according to claim 56 or 57 further comprising rotating the body such that the second end of the pipe aligns with still a further outlet wherein the still further outlet is connected to a dumping pipe for dumping the slurry into a slurry sump.

59. The method according to claim 56, 57 or 58 further comprising rotating the body such that the second end of the pipe aligns with the isolating station, blocking the flow of slurry.

60. A flow control assembly for controlling the flow of a fluid, the flow control assembly comprising: an inlet; a pipe having a first end secured to the inlet and a second end secured to a body, the body being movable such that the second end of the pipe aligns with one of four stations, the four stations comprising a first outlet, a second outlet, a third outlet, and an isolating station; an activation means for moving the body relative to the first outlet, the second outlet, the third outlet, or the isolating station; wherein the body is movable between the first outlet, the second outlet, the third outlet, or the isolating station while the fluid is being delivered to the flow control assembly.

61 . A flow control assembly for diverting the flow of a fluid between at least two pipelines, the flow control assembly comprising: an inlet; at least two stations, each being in fluid communication with a respective pipeline of the at least two pipelines, each station being sealingly secured to an end plate; a pipe having a first end secured to the inlet and a second end sealingly secured to a body, the body abutting such that a surface of the body matingly engages a surface of the end plate, the end plate and being rotatably movable relative thereto, whereupon rotation of the body the second end of the pipe aligns with one of the other at least two stations; an activation means for moving the body relative to the at least two stations; wherein the body is movable between the at least two stations whereby the second end of the pipe is caused to align with one of the other at least two stations, whereby the fluid continues to be delivered to the flow control assembly.