WO2010017567A1 - Pumping system - Google Patents
Pumping system Download PDFInfo
- Publication number
- WO2010017567A1 WO2010017567A1 PCT/ZA2009/000071 ZA2009000071W WO2010017567A1 WO 2010017567 A1 WO2010017567 A1 WO 2010017567A1 ZA 2009000071 W ZA2009000071 W ZA 2009000071W WO 2010017567 A1 WO2010017567 A1 WO 2010017567A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bladder
- fluid
- pressure vessel
- slurry
- valve tube
- Prior art date
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 37
- 239000002002 slurry Substances 0.000 claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000012530 fluid Substances 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 102000002508 Peptide Elongation Factors Human genes 0.000 description 1
- 108010068204 Peptide Elongation Factors Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/10—Pumps having fluid drive
- F04B43/113—Pumps having fluid drive the actuating fluid being controlled by at least one valve
- F04B43/1136—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0054—Special features particularities of the flexible members
- F04B43/0072—Special features particularities of the flexible members of tubular flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/0009—Special features
- F04B43/0081—Special features systems, control, safety measures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/10—Pumps having fluid drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
Definitions
- This invention relates to a pumping system and to a pressure vessel assembly for use, particularly, in a slurry pumping system.
- centrifugal pumps connected in series to achieve target pumping pressures. For example to operate at a pressure of about 20 bar seven pumps, each capable of achieving about 3 bar pressure, are required.
- Siurry can be highly abrasive.
- the wear parts of the pumps must be lined with abrasive-resistive materials. Clearances in the pumps must be generous to minimise wear and this adversely impacts on the efficiency of the pumps.
- a further negative factor is that the impeller speed in a centrifugal siurry pump must be low to avoid excessive erosion of the impeller and volute casing.
- An object of the invention is to provide a slurry pumping system which, at least partly, addresses one or more of the aforementioned requirements.
- the invention provides in the first instance a pressure vessel assembly which is suited for use in a pumping system which includes:
- an elongate cylindrical pressure vessel with a longitudinal axis, an upper substantially hemispherical end with a first fluid port, and a lower substantially hemispherical end with a second fluid port
- an elongate flexible bladder inside the pressure vessel, which has a substantially hemispherical lower end and a mouth, at an upper end which, on an outer side, is sealingly engaged with the pressure vessel, the bladder defining a second fluid volume of variable size between an outer surface of the bladder and an inner surface of the pressure vessel
- an elongate valve tube which extends inside the bladder along the longitudinal axis, and which has a plurality of flow apertures at respective locations along its length, an upper end, through which is formed a flow passage and which is located within and, externally, is in sealing engagement with, the mouth of the bladder, and a lower end.
- the pressure valve assembly includes a sensor for detecting elongation of the bladder, inside the pressure vessel, beyond a predetermined position.
- the sensor may be of any suitable type but preferably includes an elongate member, inside the valve tube, with a lower end which projects from the valve tube and which is fixed to the lower end of the bladder and a switch which is actuable upon unwanted movement of the elongate member, e.g. movement of an upper end of the member away from a predetermined location.
- the vaive tube may have a plurality of longitudinally extending sides which, optionally, may nominally be flat, and each side may have a number of flow apertures.
- each flow aperture is bounded by a respective arcuate surface which extends towards an interior of the vaive tube. This feature is intended to reduce the likelihood that the bladder can be damaged by edges of the valve tube particularly in the region of each flow aperture.
- the total cross-sectional area of the flow apertures, per unit length of the valve tube increases from the upper end of the valve tube towards the lower end of the valve tube.
- the valve tube and the bladder may be configured so that, upon collapse, the bladder has an elongate central core which abuts the valve tube, and a plurality of elongate pleats which extend radially from the core and which are angularly displaced from one another in a circumferential direction around the core, and wherein each pleat is respectively formed by first and second elongate sections of the bladder with opposed surfaces in contact with each other.
- the first fluid port may be a port for a driving fluid, e.g. water, i.e. a fluid which delivers energy to the assembly.
- the second fluid port may be a port for a driven fluid, e.g. slurry, i.e. a fluid which draws energy from the assembly.
- the invention also provides a bladder for use in the pressure vessel assembly which includes an elongate cylindrical body which is made from an elastically deformable material with a substantially hemispherical lower end, a substantially hemispherical upper end, and a tubular mouth at the upper end which includes a circumferentially extending seal formation.
- This seal formation may be in the nature of an O-ring which is integrally formed with the remainder of the body.
- Any suitable material may be used for making the bladder, e.g. rubber, a synthetic rubber-like material (elastomeric) or the like. The invention is not restricted in this regard.
- the invention further extends to a pumping system which includes first and second pressure vessel assemblies, each assembly being of the aforementioned kind, a first fluid manifold connected to the first fluid ports of the pressure vessels, a pump for pumping a first fluid to the first fluid manifold, a second fluid manifold connected to the second fluid ports of the pressure vessels, and a controller which regulates operation at least of the first fluid manifold so that, during a pumping cycle, the second fluid flows through the second fluid manifold into the second fluid volume of the first pressure vessel assembly at least while the pump pumps the first fluid into the bladder of the second pressure vessel assembly thereby to expand the bladder and displace the second fluid from the associated second fluid volume, through the second fluid manifold, into a pipeline.
- the first fluid is water
- the second fluid is slurry
- the controller may be operated continuously so that the slurry volumes of the pressure vessels are alternately filled with slurry and so that water is pumped into the bladders of the pressure vessels alternately thereby to expel slurry from the respective slurry volumes, to deliver a continuous flow of slurry.
- a damper which contains a gas, for example air, at a pressure which is dependent on the level of slurry in a slurry feed tank.
- slurry is caused to flow into the slurry volume of a pressure vessel.
- the bladder of the pressure vessel is thereby caused to collapse from its lower end towards its upper end.
- the flow apertures in the valve tube are closed successively from the lower end to the upper end of the valve tube. Consequently the flow rate through the valve tube is progressively decreased and is reduced to zero when the bladder is fully collapsed.
- This process serves to dissipate the momentum (kinetic energy) in the incoming slurry flow to the pressure vessel, thereby eliminating any fluid hammer in the incoming slurry feed line when the siurry volume is full.
- the pump is also used to pressurise the bladder of one pressure vessel assembly prior to the end of a pumping cycle based on the use of the bladder in the other pressure vessel assembly.
- control valves in the system, function concomitantly to divert water flow progressively from one bladder to the other thereby to eliminate pressure spikes in the water system and therefore also in the slurry system.
- This pressure equalization is achieved by means of a piiot valve which supplies a small quantity of water to the target bladder. After start-up of the pumping system the water pump thus operates continuously and delivers a constant flow rate which can however be adjusted as necessary to take account of the slurry supply rate.
- Figure 1 is a side view in section of a pressure vessel assembly according to the invention
- Figure 2 shows, on an enlarged scale, a sensing arrangement used to prevent damage to a bladder of the pressure vessel assembly arising due to excessive deformation of the bladder,
- Figure 3 is a side view in cross section on an enlarged scale of an upper end of the pressure vessel included in the assembly of Figure 1 ,
- Figure 4 is a cross-sectional view in plan of a valve tube included in the assembly of the invention
- Figure 5 is a perspective view of a bladder which is used in the assembly of Figure 1 ,
- Figure 6 shows the bladder when it is fully collapsed around the valve tube of Figure 4,
- Figure 7 is a view in cross section and in plan of a pressure vessel with an internal bladder in a relaxed state
- Figure 8 is similar to Figure 7 but showing the bladder fully collapsed
- Figure 9 is a schematic representation of a slurry pumping system based on the use of two pressure vessel assemblies, each of the kind shown in Figure 1. DESCRIPTION OF PREFERRED EMBODIMENT
- Figure 1 of the accompanying drawings is a side view in cross section of a pressure vessei assembly 10 according to the invention.
- the assembly includes an elongate, cylindrical pressure vessel 12 which is made from suitable steel with a lower, substantially hemispherical end 14 and an upper, substantially hemispherical end 16.
- a port 18 is positioned at the lower end 14 centred on a longitudinal axis 20 of the vessel.
- the port 18 is for a driven fluid i.e. slurry which is pressurised in the vessel.
- the port 22 is for a driving fluid i.e. water under pressure which inputs energy for the assembly.
- the slurry port 18 is connected via a suitable coupling 24 to a slurry manifold 26 which is described in greater detail hereinafter with particular reference to Figure 9.
- the water port 22 is connected via a suitable connector 28 to a water manifold 30 which is also described hereinafter in greater detail with particular reference to Figure 9.
- An elongate valve tube 34 which is shown in cross section in Figures 7 and 8 and on an enlarged scale in Figure 4, extends downwardly inside the pressure vessel
- valve tube has six sides 38 which are nominally flat. Adjacent sides adjoin at junctions 40 which lie on a circumference 42 of a circle. A plurality of flow apertures 46 are formed in the respective sides. Each flow aperture is bounded by a respective arcuate surface 48 which extends towards an interior of the valve tube. This feature is intended to reduce the likelihood that the bladder can be damaged in the region of each flow aperture, particularly by edges 50 of the valve tube.
- the apertures are centrally positioned in the respective sides and are closer to each other at a iower end 52 of the valve tube.
- the spacing 54 between adjacent flow apertures increases towards an upper end 56 of the valve tube.
- the sizes of the apertures are significantly reduced. Due to the variations in aperture sizes, and spacing, the total area of the flow apertures, per unit length of the valve tube, decreases towards the upper end of the valve tube.
- a bladder 60 is positioned inside the pressure vessel and the valve tube is located inside the bladder.
- the bladder has an elongate body 62 which, as shown in Figures 5 and 7, is generally cylindrical and has a substantially hemispherical lower end
- the bladder is made from any appropriate material e.g. rubber or any equivalent synthetic material known in the art. The invention is not limited in this regard.
- Figure 3 illustrates on an enlarged scale and in cross section a portion of the upper end 66 of the bladder.
- This end is formed with a tubular mouth 68 which flares outwardly slightly and which terminates in a sealing formation 70, in the nature of an CD- ring seal, which is integral with the tubular mouth.
- the tubular mouth is positioned inside a tapered bore 72 of the pressure vessel with the O-ring formation 70 in a complementary recess 74.
- a tapered flange 76 which, itself, is externally sealed by means of an O-ring 78, is used to secure the tubular mouth to the tapered bore.
- An upper end of the tapered flange extends to the connector 28 shown in Figure 1.
- An air vent valve 80 is operable to bleed air from a volume (referred to hereinafter as a slurry volume 192) between an inner surface of the pressure vessel 12 and an outer surface of the bladder 60 - see Figures 1 and 9.
- FIG. 2 illustrates additional constructional details of a sensing and switch mechanism 82 at the upper end of the bladder and at the lower end.
- An elongate member 84 e.g. a corrosion-resistant rod, e.g. of stainless steel, extends through the valve tube 34.
- An upper end 86 of the rod carries a switch bobbin 88 which is secured to the rod by means of a grub screw 90.
- a proximity switch 92 fixed to an appropriate housing 94 is used to detect movement of the bobbin.
- the housing 94 is attached to a spigot 96 which projects outwardly from part of the connector 28. The housing is fixed to the spigot by means of one or more grub screws 100.
- a gland holder 102 carries a U-seal 104 which provides a sealing interface with an outer surface of the rod 84.
- a seal retainer 106 ensures that the U-seal remains in position.
- a spring 108 acts between the structure at the lower end of the housing and the bobbin 88. [0038]
- a lower end 110 of the rod extends beyond the lower end 52 of the valve tube and is engaged with appropriate attachment structure 112 which fixes the lower end 110 at a central location to the lower hemispherical end 64 of the bladder.
- Figure 9 shows a slurry pumping system 120 which is based on the use of a first pressure vessel assembly 10A and a second pressure vessel assembly 10B each of the kind shown in Figures 1 to 8. Where appropriate the parts in the two pressure vessel assemblies are distinguished from each other by means of the suffixes A and B.
- the water ports 22A and 22B are connected to a compound water manifold 30.
- the slurry ports 18A and 18B are connected to a compound slurry manifold 26 -the components 30 and 26 are those referred to in connection with Figure 1.
- An outlet from the slurry manifold is directed to a slurry pipeline 130.
- An elevated slurry source 132 in the form of a tank with an internal agitator or impeller 134 is connected via an isolating valve 136 to the slurry manifold.
- An air-filled shock damper 140 is connected to the slurry manifold.
- Water from a clean water source 150 can be pumped by means of a clean water pump 152 through a water meter 154 to the water manifold 124. Water from the manifold is returned to the water source through a water meter 158.
- a programmable logic controller 160 is connected to various components of the pumping system as is indicated by means of dotted lines.
- the water manifold includes control valves 160A and 160B, return valves 162A and 162B, and pilot valves 164A and 164B, and 166A and 166B, respectively.
- the switch mechanism 82 shown in Figure 2 is notionally indicated in Figure 9 and is designated 82A and 82B respectively for the two pressure vessel assemblies.
- the slurry manifold 126 includes non-return valves 180A and 180B, and 182A and 182B, slurry drain valves 184A and 184B, and slurry purge valves 186A and 186B, respectively.
- the valves 186A and 186B can be used to direct water from the pump
- each bladder 6OA, 6OB forms a water volume 190A, 190B respectively of variable size depending on the extent of collapse of the bladder.
- a respective slurry volume 192A, 192B is formed inside each pressure vessel between an outer surface of the bladder and an inner surface of the pressure vessel.
- the slurry tank 132 is filled with slurry, and the agitator 134 is engaged.
- the water tank 150 is full to the required operating level and all valves in the system are closed.
- the controller 160 is used to initiate a start-up sequence whenever the system has been shut down and is to be restarted.
- vent valves 8OA and 8OB are opened for a short interval, for example two minutes, and the return valves 162A and 162B are also opened.
- the slurry tank 132 is positioned higher than the pressure vessel so that when the slurry isolator valve 136 is opened slurry flows under gravity action into the slurry manifold 126, past the non-return valves 186A and 186B, and into the slurry volumes 192A and 192B. If it is not possible to elevate the slurry tank, an appropriate feed pump arrangement is used to supply slurry to the manifold 126. [0050] The slurry fills each slurry volume from the bottom of each pressure vessel and as the slurry levels rise the bladders collapse inwardly towards the respective valve tubes. Air in the slurry volumes is exhausted through the vent valves 8OA and 8OB.
- Air which may be in the bladders is exhausted via the water return valves 162A and 162B into the water tank 150. Within a short period both slurry volumes are completely filled with slurry. At this point slurry flows through the vent valves 8OA and 8OB. Both bladders are fully collapsed around the respective valve tubes and each bladder takes up the configuration shown in Figure 8 wherein, as is further described hereinafter, the flow apertures 46 in the valve tubes are closed by the bladder material.
- Air in the damper 140 is compressed to a maximum extent into a bubble at an upper end of the damper.
- a pressure transducer 200 reads the pressure which is created by the difference in elevation between the transducer and the slurry level in the tank 132 and transmits a reading of this pressure to the controller 160.
- the difference in elevation between the transducer and the low level of the slurry in the tank 132 is ten metres and the slurry has a specific gravity of 1 ,5 then the pressure reading is of the order of 1 ,5 bar.
- the controller 160 causes the vent valves 8OA and 8OB, and the water valves 162A and 162B, to be closed, whereafter the pump 152 is started and the control valve 160B, the pilot valve 164B and the water return valve 162A are opened. Water can then flow under pressure from the pump through the meter 154 into the valve tube 34B.
- the controller 160 is driven by the water meter 154 which has a pulsed output.
- the design displacement volume of each of the bladders in their relaxed states is 300 litres and that the meter 154 sends a pulse every 10 litres.
- Thirty pulses from the meter means that 300 litres have been pumped into a bladder and as a consequence 300 litres of slurry would have been discharged into the pipeline 130 at a pressure determined by the back pressure in the pipeline.
- the pulses from the meter 154 continue to register in the controller 160.
- the controller causes the water return valve 162A to be closed and then, on pulse 27, it causes the pilot valve 164A to open. This pre-pressurises the vessel 12A to the correct operating pressure.
- the controller 160 instructs the control valves 160A and 160B to change state concomitantly.
- the pulse counter in the controller resets to zero and then continues to count the next thirty pulses as water flows into the other vessel.
- the meter pulses the controller 160 to provide an indication of the volume of water which has been expelled. If insufficient water is expelled then the controller stops the system and reports an overlap fault.
- the slurry system is oversized with respect to the water pumping system by about 50%. This ensures that the slurry filling rate, for one slurry volume, is completed well before the slurry discharge from the other slurry volume has reached 300 litres. (The numerical values given herein are exemplary only, and are non-limiting).
- the overlap in time provides a window during which pressures in the vessels are balanced by means of the pilot valves and during which a small fiow of slurry is commenced so that when the full flow of water is diverted to the bladder, which has been pressurised, a smooth transition can be achieved without pressure spikes.
- the controller 160 As the water flows into the bladder 6OA the pulses from the water meter 154 register in the controller 160. At pulse 25 the controller closes the water valve 162B and the pilot valve 166B. At pulse 27 the pilot valve 164B is opened and the vessel 10B is pressurised to the operating pressure. On pulse 30 (in this example) the controller is caused to change the state of the controi valves 160A and 160B whereupon the next cycle in the pumping sequence begins.
- each valve tube 34A, 34B acts as a control valve wherein the flow apertures 46A, 46B progressively shut off as the associated bladder collapses under the action of the slurry.
- the slurry enters the slurry volume from a lower end and gradually causes the bladder to collapse from the lower end upwardly.
- the flow apertures 46 are further apart and are smaller in size.
- the flow passages 46 have surrounding arcuate side walls 48 which extend inwardly towards an interior of the valve tube with inner edges 48X well set back so that the likelihood of bladder damage arising when the bladder has been fully collapsed and bears hard against the valve tube, is much reduced.
- the switch mechanism 82 shown in particular in Figure 2 is used to reduce the likelihood of the bladder being damaged if it is over-pressurised.
- the bladder is made from a highly elastic material and thus can be elongated by a factor of up to eight. If the bladder is over-pressurised it is quite possible for the bladder to be extruded through the slurry port 18 and into the slurry manifold - an event which would cause destruction of the bladder.
- the switch mechanism 82 is intended to prevent this from occurring.
- the bladder should be deformed in a radial sense only i.e. between the relaxed position shown in Figure 7 and the collapsed configuration shown in Figure 8. For this type of operation the bladder length is not extended to any meaningful extent.
- the bladder once fully expanded in a radial sense, initially abuts an inner wall of the pressure vessel but, thereafter, further pressurisation causes the length of the bladder to be increased. If this occurs the rod 86, which has one end attached to a central position of the lower hemispherical end of the bladder, is moved downwardly inside the housing 94 against the bias of the spring 108. Movement of the switch bobbin 88, attached to the upper end of the rod, is detected by the sensor 92 and an alarm signal is directed to the controller 160 which stops functioning of all components of the slurry pumping system. All valves then revert automatically to closed positions.
- the pumping system of the invention possesses significant advantages compared to conventional centrifugal slurry pumps, which include the following: elimination of glands or rotating seals operating in slurry; no gland service water pump; no gland service water cost; no pumps operating in slurry; no control instrumentation in slurry; immediate detection of any malfunction; each bladder has a high service life for the bladder material has an elongation factor of about 800% and in use is only subjected to stretch of 10% maximum - thus the material is virtually stress free; use is made of only one direct coupled, high efficiency, multi-stage, clear water pump
- each pressure vessel which is comparatively inexpensive, as opposed to increasing the diameter of a vessel, which is expensive.
- each pressure vessel is of integral welded construction, connecting flanges are not required.
- the upper opening in the vessel is dimensioned so that the bladder and valve tube can be located inside the vessel by being passed through the opening, at the upper end, to which the flange 76 is fixed.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Check Valves (AREA)
- Reciprocating Pumps (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2736856A CA2736856C (en) | 2008-08-03 | 2009-08-03 | Pumping system |
RU2011104247/06A RU2519681C2 (en) | 2008-08-03 | 2009-08-03 | Pump system |
AU2009279417A AU2009279417B2 (en) | 2008-08-03 | 2009-08-03 | Pumping system |
ZA2011/01489A ZA201101489B (en) | 2008-08-03 | 2011-02-25 | Pumping system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA2008/06813 | 2008-08-03 | ||
ZA200806813 | 2008-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010017567A1 true WO2010017567A1 (en) | 2010-02-11 |
Family
ID=41226258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ZA2009/000071 WO2010017567A1 (en) | 2008-08-03 | 2009-08-03 | Pumping system |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU2009279417B2 (en) |
CA (1) | CA2736856C (en) |
CL (1) | CL2011000231A1 (en) |
RU (1) | RU2519681C2 (en) |
WO (1) | WO2010017567A1 (en) |
ZA (1) | ZA201101489B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106438299A (en) * | 2016-08-19 | 2017-02-22 | 天津海辰华环保科技股份有限公司 | Airbag punching type pneumatic mud booster pump |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9671065B2 (en) * | 2013-10-17 | 2017-06-06 | Lincoln Industrial Corporation | Pump having wear and wear rate detection |
RU2669068C1 (en) * | 2017-07-14 | 2018-10-08 | Дмитрий Юрьевич Мартынов | Compressor with movable flexible membrane |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB444845A (en) * | 1934-03-06 | 1936-03-30 | Mueller Friedrich | Improvements in or relating to means for raising liquids |
US3062153A (en) * | 1961-01-25 | 1962-11-06 | William A Losey | Method of and means for pumping various kinds of matter |
WO1997049897A1 (en) * | 1996-06-23 | 1997-12-31 | Anglogold Limited | Fluid transfer system |
EP1602830A1 (en) * | 2004-06-02 | 2005-12-07 | Ailand Corporation S.A. | Hydraulically driven multicylinder pumping machine |
-
2009
- 2009-08-03 CA CA2736856A patent/CA2736856C/en not_active Expired - Fee Related
- 2009-08-03 AU AU2009279417A patent/AU2009279417B2/en not_active Ceased
- 2009-08-03 WO PCT/ZA2009/000071 patent/WO2010017567A1/en active Application Filing
- 2009-08-03 RU RU2011104247/06A patent/RU2519681C2/en active
-
2011
- 2011-02-03 CL CL2011000231A patent/CL2011000231A1/en unknown
- 2011-02-25 ZA ZA2011/01489A patent/ZA201101489B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB444845A (en) * | 1934-03-06 | 1936-03-30 | Mueller Friedrich | Improvements in or relating to means for raising liquids |
US3062153A (en) * | 1961-01-25 | 1962-11-06 | William A Losey | Method of and means for pumping various kinds of matter |
WO1997049897A1 (en) * | 1996-06-23 | 1997-12-31 | Anglogold Limited | Fluid transfer system |
EP1602830A1 (en) * | 2004-06-02 | 2005-12-07 | Ailand Corporation S.A. | Hydraulically driven multicylinder pumping machine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106438299A (en) * | 2016-08-19 | 2017-02-22 | 天津海辰华环保科技股份有限公司 | Airbag punching type pneumatic mud booster pump |
Also Published As
Publication number | Publication date |
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AU2009279417B2 (en) | 2013-10-24 |
RU2519681C2 (en) | 2014-06-20 |
CA2736856A1 (en) | 2010-02-11 |
CL2011000231A1 (en) | 2011-08-26 |
AU2009279417A1 (en) | 2010-02-11 |
ZA201101489B (en) | 2011-10-26 |
RU2011104247A (en) | 2012-09-10 |
CA2736856C (en) | 2016-03-15 |
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