EP0419695A1 - Slurry pumping apparatus - Google Patents

Slurry pumping apparatus Download PDF

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Publication number
EP0419695A1
EP0419695A1 EP89117765A EP89117765A EP0419695A1 EP 0419695 A1 EP0419695 A1 EP 0419695A1 EP 89117765 A EP89117765 A EP 89117765A EP 89117765 A EP89117765 A EP 89117765A EP 0419695 A1 EP0419695 A1 EP 0419695A1
Authority
EP
European Patent Office
Prior art keywords
slurry
pumping
hydraulic cylinders
hydraulic
devices
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.)
Ceased
Application number
EP89117765A
Other languages
German (de)
English (en)
French (fr)
Inventor
Takeshi Hoya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0419695A1 publication Critical patent/EP0419695A1/en
Ceased legal-status Critical Current

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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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1176—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
    • F04B9/1178—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • 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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • the invention relates to a solid-liquid separation, and more particularly to a method and apparatus for separating factory wastes, agricultural wastes or stock forming wastes into solid and liquid slurries.
  • An object of the present invention is to overcome defi­ciencies in the prior art, such as indicated above.
  • Another object of this invention is to provide a slurry pumping method and equipment that solves various problems associ­ated with conventional slurry solid-liquid separation processing.
  • a further object is to provide a slurry pumping method and equipment which makes use of features of the already developed slurry processing technology and which is inexpensive and can be relied upon to perform continuous operation.
  • Still another object is to provide a slurry pumping method and equipment which has good durability, long life, and high reliability and which can be applied to various industries as anti-pollution technology.
  • a slurry pump­ing system 1 forms the core of the invention.
  • the hardware of this system is a slurry pumping apparatus 2, shown in more detail in Fig. 7, which has a pair of diaphragm type pumping devices 3, 3 arranged side-by-side.
  • the slurry pumping apparatus 2 is connected, through piping, between a slurry tank 4 and a solid-liquid separation filter press 5.
  • a controller 6 starts one of the two pumping devices 3 and alternates their operation. Any one of them can be chosen for operation and it is also possible to automatically stop both of them.
  • each slurry pumping device 3 is shown in Fig. 7.
  • the casing 7 has supply and discharge ports 8, 9 connected to the slurry tank 4 and the filter press 5.
  • electromagnetic open-close valves 10, 11 which are electrically connected to the controller 6.
  • a protruding type resilient diaphragm 12 made of rubber with a certain thickness which is U-shaped in vertical cross-section like the casing 7.
  • the diaphragm 12 is interposed between the casing 7 and a porous support 13 which has a certain mesh and is also U-shaped in verti­cal cross-section.
  • the resilient diaphragm 12 can be expanded and contracted and has its base securely clamped by a flange 14 at the upper part of the casing 7.
  • the resilient diaphragm 12 is expand­ed until it contacts the inner surface of the casing 7 and is contracted until it contracts the support 13.
  • the resilient diaphragm 12 as it expands and contracts, introduces slurry from the slurry tank 4 into the space between the casing 7 and the resilient diaphragm 12, and at the same time delivers the slurry out into the filter press 5.
  • the resilient diaphragm 12 comes into contact with the support 13 so that it is not folded, preventing the repetitive formation of wrinkles or folded lines and potential break of the resilient diaphragm 12 through fatigue.
  • a main cylinder 15 is formed integral with and mounted on the top of the casing 7. Securely mounted on the casing 17 of the main cylinder 15 is a casing 17′ of a sub-cylinder 19 which has working oil supply and discharge ports 18, 18′. Inside the casings 17, 17′ of the main cylinder 15 and sub-cylinder 19 are installed working pistons 20, 21 that are interconnected by a single rod 22 so that the two pistons can perform a reciprocating motion as one piece. The upper end of the rod 22 that passes through the top of the sub-cylinder 19 is attached with a dog 23, which is engaged with or disengaged from a limit switch 24 elec­trically connected to the controller 6 to send a stroke end detec­tion signal to the controller 6.
  • the two sub-cylinders 19, 19 of both slurry pumping devices 3, 3 communicate with each other through a hydraulic passage 25 that interconnects the base portions of the sub-­cylinders 19, 19 at a point immediately above the down stroke end of the piston 21.
  • the relay equipment 29 in the con­troller 6 is electrically connected with: the delivery pump 30 to supply slurry 26 from the slurry tank 4; electromagnetic open-­close valves 10, 11 connected to the supply and discharge port 8, 9; sleeve valves 33, 34, 35, 36 connected through hydraulic pas­sages 32, 32′, 32 ⁇ to the oil tank 31; and the oil pump 37 through cable 38 to send control signals to the pump 37.
  • the working oil is delivered by the oil pump 37 from the oil tank 31 through sleeve valve 36 and sleeve valve 34 into the port 18′ of the right-hand side sub-cylinder 19, pushing the piston 21 downwardly.
  • This causes the oil in the right-hand side sub-cylinder 19 to be discharged from the lower port 18 and returned through sleeve valve 35 and sleeve valve 36 to the oil tank 31.
  • the dog 23 of the rod 22 turns on the limit switch 24, operating the relay equipment 29 of the controller 6 to activate the sleeve valves 33, 34, 35, 36 to the positions shown in Fig. 3.
  • the sleeve valves 33, 34, 35, 36 operated, the working oil from the oil tank 31 is delivered from the hydraulic pump 37, through sleeve valves 36 and 34 to the upper port 18′ of the left-­hand side sub-cylinder 19.
  • the oil in the right-hand side sub-cylinder 19 is returned from the upper port 18′ to the oil tank 31 through the hydraulic passage 32 and sleeve valves 34 and 36.
  • the right and left sub-cylinders 19, 19 are interconnected through the hydraulic passage 25, so that the working oil in the left-hand side sub-cylinder 19 moves through the hydraulic passage 25 into the right-hand side sub-cylinder 19, applying pressure to the underside of the piston rod 22 of the right sub-cylinder 19 to start the slurry pumping device 3.
  • the piston 21 of the right sub-cylinder 19 is pushed down by the working oil intro­duced from the upper port 18′, as shown in Fig. 2.
  • the lower port 18 of the right sub-cylinder 19 is connected to the sleeve valve 35, returning the oil through the sleeve valve 36 to the oil tank 31.
  • the upper port 18′ of the left sub-cylinder is blocked by the sleeve valve 33, so that oil passage 25 is also blocked. There­fore, the pressurized working oil under the piston 21 of the right sub-cylinder 19 does not apply pressure to the underside of the piston 21 of the left sub-cylinder 19.
  • the sleeve valves 33, 34, 35, 36 are switched as shown in Fig. 3, with the result that the lower port 18 of the right-sub-­cylinder 19 is blocked by the sleeve valve 35 and that the upper port 18′ of the left sub-cylinder 19 is pressurized through sleeve valves 33, 34 and 36.
  • the hydraulic passage 25 communicates with the left and right sub-cylinders 19, 19, so that the pressing action of one piston 21 applies pressure to the other piston 21, operating the limit switch 24 through the engagement or disengage­ment of the dog 23 of each rod 22 at the stroke end.
  • the limit switch 24 in turn drives the relay equipment 29 of the controller 6 operating the sleeve valves 33, 34, 35, 36 as shown in Fig. 4. This automatically switches each sub-cylinder 19 into the active or passive pressure condition when the piston 21 reaches the end of its stroke.
  • the sleeve valves 33, 34, 35, 36 are oper­ated, as shown in Fig. 5, the pistons 21, 21 of the left and right sub-cylinders 19, 19 switch between the active and the passive pressure conditions at the upper dead point and the lower dead point, i.e. at the up stroke end and down stroke end.
  • the pistons 20, 20 of the main cylinders 15, 15 are also moved up or down by the rods 22, continually repeating the recip­rocal movement.
  • the working oil 27 sealed inside the resilient protruding diaphragm 12 installed in the casing 7 of the pumping device 3 is repetitively switched between the positive and the negative pressure condition to expand and contract the resilient diaphragm 12 through a specified stroke.
  • the limit switch 24 for the relay equipment 29 of the controller 6 is turned on or off by the dog 23 to operate the open-close valves 10, 11 and also the delivery pump 30. This causes the slurry 26 to be supplied from the slurry tank 4 into the casing 7 through the port 8 and discharged from the casing 7 through the port 9 and delivered under pressure into the large and thick filter press 5 where the slurry undergoes the solid-liquid separation process.
  • the support 13 made of porous plate, as mentioned above, so that during the contracting process the resilient diaphragm 12 will be prevented from becoming smaller than the support 13. This ensures that no wrinkles will be formed on the interior or exterior sur­face of the resilient diaphragm 12, thus eliminating the possibil­ity of fatigue fracture at the folded portions of the wrinkles. Therefore, the suction and delivery of slurry 26 can be reliably performed.
  • the working oil 28 between the main cylinder 15 and the sub-cylinder 19 serves as a kind of lubricating oil, eliminating friction and assuring smooth continuous reciprocating motions.
  • the stop button on the controller 6 is pressed. With the stop button pressed, the sleeve valves 33, 34, 35, 36 are switched as shown in Fig. 6, stopping the oil supply from discharging into the oil tank 31 through all ports 18, 18, 18′, 18′ and hydraulic passage 25, halting the sub-cylinders 19, 19 and therefore the slurry pumping system 1.
  • the supply and discharge of working oil between the sub-cylinder 19, 19 and the oil tank 31 are controlled by four sleeve valves 33, 34, 35, 36. Because the hydraulic passages in the sleeve valves are narrow, as shown in Figs. 1 through 6, the flow resistance of the working oil is high, which may give rise to problems of reduced efficiency due to pressure loss.
  • open-close valves 34′ and 35′ are installed in the hydraulic passage 32′ between the valve unit 36′ and the ports 18.
  • the ports 18 are formed immediivelyately above the stroke end of the piston 21 of the casing 17′, 17′ of the sub-cylinders 19′, 19′.
  • An open-close valve 33′ is in­stalled in the hydraulic passage 25 that communicates the two sub-­cylinders 19′, 19′.
  • These valves 33′, 34′, 35′ are hydraulically connected to the valve unit 36′ which is controlled by the con­troller 6, in order to reduce the flow resistance of the working oil and thereby assure smooth flow of oil.
  • valve unit 36′ is controlled to close the valves 34′, 35′ and open the valve 33′.
  • valve unit 36′ is controlled by the controller 6 to close the valves 33′, 35′ and open the valve 34′.
  • the use of the valve unit 36′ contributes to simpler and smoother valve operation and control.
  • the resilient diaphragm 12′ installed in the casing 17′ is shaped like a drum with a support 13′ of a specified mesh interposed between the casing 17′ and the diaphragm 12′, while in the preceding embodiments of the pumping device 3 the resilient diaphragm 12 is of protruding type.
  • the resilient diaphragm 12′ is expandable in the radial direction of the casing 17′ and there­fore has smaller fatigue, assuring higher durability. With this construction, the pumping of the slurry 26 can be done reliably.
  • a hydraulic passage 25′ is formed between the port 18 ⁇ at the lower dead point of the piston 20 of the main cylinder 15′ and the port 18′′′ at the upper portion of the casing 17′.
  • the apparatus of this invention has the following advan­tages.
  • a very large delivery force can be obtained continuously so that the solid-liquid separation of slurry can be carried out continuously, instead of in batch form. Therefore, in the machinery manufactur­ing factories, agricultural and stock farming facilities, the slurry produced continuously in large quantity can reliably be processed to separate solid from liquid.
  • a pair of hydraulic cylinders of the diaphragm type pumping devices are communicated with each other through a hydrau­lic passage.
  • One of the cylinders is first started, followed by the other, thus alternately activating the two cylinders. Since one cylinder can be started easily, it is possible to smoothly shift to the continuous alternating operation of the two cylinders.
  • Another advantage is that since the pair of diaphragm type pumping devices are interconnected through a hydraulic pas­sage, the pressure produced in one device in the active cycle is applied to the other device in the passive cycle, making the passive cycle device respond to the operation of the active cycle device. This in turn ensures smooth alternating operation of the paired diaphragm type pumping devices and therefore the reliable continuous delivery of slurry to the filter press.
  • the hydraulic cylinders can be driven to continu­ously deliver slurry from the slurry tank into the filter press where it is processed for solid-liquid separation.
  • either one of the pumping devices can be started easily if the first device to be started has previously stopped in the active or in the passive cycle, the system can be smoothly shifted into continuous operation.
  • a slurry pumping method and an apparatus to deliver slurry waste from factories to a filter press for solid-liquid separation In this apparatus, a pair of laterally or vertically arranged diaphragm type pumping devices are activated by hydrau­lic cylinders, each consisting of a main cylinder and a sub-­cylinder directly connected to the main cylinder, to introduce slurry from the slurry tank and deliver it under pressure by a resilient diaphragm of each pumping device to the filter press where it is processed for solid-liquid separation.
  • One of the diaphragm type pumping devices is first started, followed by the other, thus alternately and repetitively activating the two pump­ing devices to achieve continuous operation of the slurry pumping process.
  • the two hydraulic cylinders of both diaphragm type pumping devices are stopped by controlling the sleeve valves. In this way, an effective slurry pumping can be achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP89117765A 1988-06-02 1989-09-26 Slurry pumping apparatus Ceased EP0419695A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63134355A JP2671216B2 (ja) 1988-06-02 1988-06-02 スラリー圧送装置

Publications (1)

Publication Number Publication Date
EP0419695A1 true EP0419695A1 (en) 1991-04-03

Family

ID=15126430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89117765A Ceased EP0419695A1 (en) 1988-06-02 1989-09-26 Slurry pumping apparatus

Country Status (2)

Country Link
EP (1) EP0419695A1 (ja)
JP (1) JP2671216B2 (ja)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476616A1 (de) * 1990-09-19 1992-03-25 Paul Pleiger Steuerung für Kolbenpumpen
WO2013170279A1 (en) * 2012-05-08 2013-11-14 Jarmo Uolevi Leppanen Pumping system
EP2913525A1 (en) * 2014-02-26 2015-09-02 Garniman SA Hydraulically driven bellows pump
CN107842480A (zh) * 2017-12-12 2018-03-27 浙江通森环保设备科技有限公司 一种污水泵
WO2020161237A1 (en) * 2019-02-06 2020-08-13 Mhwirth Gmbh Fluid pump, pump assembly and method of pumping fluid

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04191471A (ja) * 1989-12-28 1992-07-09 Toufuku Kk 粘性流体圧送装置
KR100945589B1 (ko) * 2008-03-14 2010-03-08 옥수산업 주식회사 간이 상수도의 소독약 투입장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065230A (en) * 1975-01-17 1977-12-27 Hart Associates, Inc. Reciprocating infusion pump and directional adapter set for use therewith
EP0175391A2 (en) * 1984-09-21 1986-03-26 Takeshi Hoya Slurry pumping apparatus for solid-liquid separation
DE3448016A1 (de) * 1984-08-03 1986-06-12 Klaus 6107 Reinheim Obermann Duplex-plunger-pumpe
EP0197632A2 (en) * 1985-02-12 1986-10-15 Hydroseal Concrete Pumps Limited Actuator for a reciprocating slurry pump
EP0226122A2 (de) * 1985-12-04 1987-06-24 Kopperschmidt-Mueller GmbH & Co KG Pumpe
EP0247459A1 (en) * 1986-05-19 1987-12-02 Hoya Takeshi Pressure-feeding apparatus
EP0319093A1 (en) * 1987-11-30 1989-06-07 Tetra Dev-Co Pump unit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065230A (en) * 1975-01-17 1977-12-27 Hart Associates, Inc. Reciprocating infusion pump and directional adapter set for use therewith
DE3448016A1 (de) * 1984-08-03 1986-06-12 Klaus 6107 Reinheim Obermann Duplex-plunger-pumpe
EP0175391A2 (en) * 1984-09-21 1986-03-26 Takeshi Hoya Slurry pumping apparatus for solid-liquid separation
EP0197632A2 (en) * 1985-02-12 1986-10-15 Hydroseal Concrete Pumps Limited Actuator for a reciprocating slurry pump
EP0226122A2 (de) * 1985-12-04 1987-06-24 Kopperschmidt-Mueller GmbH & Co KG Pumpe
EP0247459A1 (en) * 1986-05-19 1987-12-02 Hoya Takeshi Pressure-feeding apparatus
EP0319093A1 (en) * 1987-11-30 1989-06-07 Tetra Dev-Co Pump unit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0476616A1 (de) * 1990-09-19 1992-03-25 Paul Pleiger Steuerung für Kolbenpumpen
US5222872A (en) * 1990-09-19 1993-06-29 Paul Pleiger Maschinenfabrik Gmbh & Co. Kg Control system for piston pumps
WO2013170279A1 (en) * 2012-05-08 2013-11-14 Jarmo Uolevi Leppanen Pumping system
EP2913525A1 (en) * 2014-02-26 2015-09-02 Garniman SA Hydraulically driven bellows pump
WO2015128283A1 (en) 2014-02-26 2015-09-03 Garniman S.A. Hydraulically driven bellows pump
AU2015222279B2 (en) * 2014-02-26 2018-03-29 Garniman S.A. Hydraulically driven bellows pump
RU2669099C2 (ru) * 2014-02-26 2018-10-08 Гарниман С.А. Сильфонный насос с гидравлическим приводом
US10487818B2 (en) 2014-02-26 2019-11-26 Garniman S.A. Hydraulically driven bellows pump
CN107842480A (zh) * 2017-12-12 2018-03-27 浙江通森环保设备科技有限公司 一种污水泵
WO2020161237A1 (en) * 2019-02-06 2020-08-13 Mhwirth Gmbh Fluid pump, pump assembly and method of pumping fluid

Also Published As

Publication number Publication date
JPH01305176A (ja) 1989-12-08
JP2671216B2 (ja) 1997-10-29

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