US3743444A - Oil-diaphragm slurry pump - Google Patents

Oil-diaphragm slurry pump Download PDF

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Publication number
US3743444A
US3743444A US00220775A US3743444DA US3743444A US 3743444 A US3743444 A US 3743444A US 00220775 A US00220775 A US 00220775A US 3743444D A US3743444D A US 3743444DA US 3743444 A US3743444 A US 3743444A
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US
United States
Prior art keywords
oil
chamber
diaphragm
slurry
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00220775A
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English (en)
Inventor
T Kazama
K Seki
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.)
Mitsubishi Shindoh Co Ltd
Original Assignee
Mitsubishi Shindoh Co Ltd
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 Mitsubishi Shindoh Co Ltd filed Critical Mitsubishi Shindoh Co Ltd
Application granted granted Critical
Publication of US3743444A publication Critical patent/US3743444A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/141—Intermediate liquid piston between the driving piston and the pumped liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3115—Gas pressure storage over or displacement of liquid
    • Y10T137/3143—With liquid level responsive gas vent or whistle
    • Y10T137/3146—Combined high and low level responsive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7287—Liquid level responsive or maintaining systems
    • Y10T137/7303—Control of both inflow and outflow of tank

Definitions

  • This invention relates generally to liquid-diaphragm type pumps and more particularly to slurry pumps of the oil-diaphragm type for deliverying under pressure liquids containing abrasive particlessuch as slurries of ores. More specifically, the invention relates to a new and advanced system for automatically adjusting the oil-slurry interface and for automatic deaeration in slurry pumps of the above stated class.
  • a slurry pump of this type comprises, essentially, a reciprocating pump for-applying reciprocating motion to a liquid (e.g., an oil) of a specific gravity less than that of the slurry to be pumped, a valve box containing slurry suction and delivery valves, and a vertical oil-diaphragm chamber connected at its upper part via an oil connecting pipe to the cylinder of the reciprocating pump and at its lower part via a slurry connecting pipe to a part of the valve box between the suction and delivery valves.
  • a liquid e.g., an oil
  • a valve box containing slurry suction and delivery valves
  • a vertical oil-diaphragm chamber connected at its upper part via an oil connecting pipe to the cylinder of the reciprocating pump and at its lower part via a slurry connecting pipe to a part of the valve box between the suction and delivery valves.
  • the lower part of the oil-diaphragm chamber and the slurry connecting pipe are filled with slurry, while the upper part of the diaphragm chamber above the slurry, the oil connecting pipe, and the cylinder of the reciprocating pump are filled with the oil.
  • the difference between the specific gravities of the slurry and the oil maintains the oil above the slurry in the oil diaphragm chamber with an interface between the two liquids.
  • the slurry pump Since there is no wearof the'pump cylinder and piston or plunger by the slurry in a slurry pump of this liquid-diaphragm type, the slurry pump is capable of operating with high efficiency in delivering slurry under pressure. In this operation, however, it is necessary to hold the interface between the oil and the slurry in the oil-diaphragm chamber continually at a correct posito discharge the accumulated air. For these reasons, it
  • an automatic control system for automatically and controllably maintaining the oil diaphragm and extracting air in the oiLdiaphragm chamber of an oil-diaphragm type slurry pump, the control system comprising a level detection device for detecting the position of the oil diaphragm, an air detection device for detecting air quantity within the chamber, oil-supplying and oil-discharging valves, and an automatic controller for operating in response to detection signals from the level detection andair detection devices to operate the oil-supplying and oil-discharging valves and thereby to maintain the oil diaphragm at a predetermined normal position and to discharge air from the chamber.
  • FIGURE is a diagrammatic side elevation, in vertical section, showing the essential parts of an oil-diaphragm type slurry pump incorporating an example of the automatic control system according to this invention.
  • an oil-diaphragm type slurry pump comprises, essentially, a pump device A, a valve box device B, and an oil-diaphragm chamber device C connected therebetween.
  • the pumpdevice A comprises a plunger pump driving mechanism 1, a plunger 2, and a cylinder 3 in which the plunger 2 operates.
  • the valve box device B comprises a valve box 4, upper (delivery) and lower (suction) valve seats 5 and 6 provided within the valve box, ball valves 7 and 8 for cooperative operation with valve seats 5 and 6, respectively, a slurry suction pipe 9, and a slurry delivery pipe 10.
  • the oil-diaphragm chamber device C comprises a vertical chamber 11, an oil connecting pipe 11 communicatively connecting the upper connecting pipe [3 connecting the lower part of the a chamber to a part between the two valve seats 5 and 6 of the valve box 41, an oil tank 15 disposed above the chamber and connected to the upper part thereof by way of an oil supply valve 14.
  • an interface L is formed naturally between the oil 0 and the slurry S in the chamber 11 be- More specifically, when the drivingmechanism 1 operates to drive the plunger 2 in its compression stroke toward the left, as viewed in the drawing, the oil in the cylinder 3 is displaced into the diaphragm chamber 11, whereby the interface L is forced downward to apply pressure on the liquid column of the slurry S.
  • the reciprocating motion of the plunger 2 produces a pumping action whereby slurry is drawn from the suction pipe 9 and discharged into the delivery pipe 10.
  • the aforestated object is achieved in accordance with this invention by providing, in a slurry pump of the above described organization and operation, a control system as described below for automatically controlling the level of the oil-slurry interface L and removing accumulated air in the oil-diaphragm chamber 11.
  • the lowest sensor 16 is adapted to detect the interface L at its lower limit of fluctuation and is installed at the height position of lowest limit of the interface required for operation.
  • the sensor 17 is adapted to detect the interface L at its set medial position and is installed at the desired normal medial position.
  • the sensor 18 is adapted to detect the interface at its upper limit of fluctuation and isinstalled at the height position of highest limit of the interface'necessary for operation.
  • the highest sensor 19 is adapted to detect the presence of air and is installed in the vicinity of the highest part of the interior of the chamber 11.
  • the controller 20 contains four controller elements 20a, 20b, 20c and 20d which are connected to the sensors 16, l7, l8, and 19, respectively.
  • Each of these controller elements is, for example, a switching element which, upon receiving the detection signal from the associated level sensor, sends an operating signal to valve actuators 14a and/or 22a for the valves 14 and 22 to open or close the same.
  • the valve 14 is an oil supply valve installed in an oil supply line from the oil tank 15 to the upper part of the diaphragm chamber 1 1.
  • the valve 22 is installed in an oil return line 21 provided as a part of the system from the upper part of the chamber 11 to the upper part of the oil tank 15.
  • the oil return line 21 and the oil supply line in which the valve 14 is installed are provided with respective means such as check valves (not shown) to prevent flow of oil therethrough-in directions reverse to those intended (as indicated by arrows). 4
  • the control system of this invention of the essential organization as describe above operates in the following manner during the operation of the slurry pump as described hereinbefore.
  • the supply of oil into the diaphragm chamber 11 is so adjusted that the medial position of the interface L is at the level of the sensor 17.
  • the pump driving mechanism is then started to start normal operation of the slurry pump as described hereinbefore.
  • the level of the interface L gradually moves upward because of occurrences such as wetting of packings and leakage of the oil which cause a decrease in the oil quantity in the chamber 11 and thereby a disturbance of the initial balance between the slurry S and the oil 0.
  • the sensor 18 detects this condition and automatically sends a corresponding signal to the controller 20.
  • the controller 20 thereupon operates automatically to generate and send an output to operate the oil supply valve 14 in the direction for opening the same. Consequently, oil is supplied from the tank 15 to the interior of the chamber 1 1, whereby the level of the interface L descends.
  • the interface When the interface reaches the level of the sensor 17 (i.e., the set medial position), the sensor 17 detects this condition and sends a corresponding signal to the controller 20, which thereupon operates to produce an output which closes the oil supply valve 14. Thus, the interface is automatically adjusted at the predetermined normal medial position.
  • the interface L descends and reaches the level of the sensor 16
  • the sensor 16 detects this condition and operates to send a corresponding signal to the controller 20.
  • the controller 20 thereupon operates in response to this detection signal to produce an output for opening the valve 22, whereby some of the oil in the chamber 11 is returned'to the oil tank 15 .through the line 21 by the compressing action of.
  • the interface level rises, and when it reaches the level of the sensor 17, the sensor 17 sends a signal to the controller 20, which thereupon operates to close the valve 22.
  • the normal level of the interface L is automatically adjusted to the set normal position.
  • the air sensor 19 detects this condition and sends a detection signal to the controller 20.
  • the controller 20 operates in response to this signal to open the valve 22 for a short time, whereupon the accumulated air is discharged through the line 21 to the atmosphere.
  • an automatic control system comprising level detection means for detecting the position of the oil diaphragm, air detection means for detecting air quantity within the chamber, oil-supplying and oil-discharging valves, said valves communicating with said chamber and said oil supplying valve communicating with a source of oil,
  • an automatic controller for operating in response to dection signals from the level detection means and the air detection means to operate said valves and thereby to maintain the oil diaphragm at a predetermined normal position and to discharge air from the chamber.
  • said level detection means comprises a high limit level sensor, a low-limit level sensor and a normal-level sensor; and wherein said controller is operative to open said oil supplying valve to supply oil into said chamber upon receiving a detection signal from the high-limit level sensor, to open said oil-discharging valve to discharge oil from within said chamber upon receiving a detection signal from the low-limit level sensor, and to close said valves upon receiving a detection signal from the normal level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US00220775A 1971-06-24 1972-01-26 Oil-diaphragm slurry pump Expired - Lifetime US3743444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP46045971A JPS5018604B1 (fr) 1971-06-24 1971-06-24

Publications (1)

Publication Number Publication Date
US3743444A true US3743444A (en) 1973-07-03

Family

ID=12734097

Family Applications (1)

Application Number Title Priority Date Filing Date
US00220775A Expired - Lifetime US3743444A (en) 1971-06-24 1972-01-26 Oil-diaphragm slurry pump

Country Status (7)

Country Link
US (1) US3743444A (fr)
JP (1) JPS5018604B1 (fr)
AU (1) AU451139B2 (fr)
CA (1) CA967427A (fr)
DE (1) DE2218781A1 (fr)
GB (1) GB1337875A (fr)
ZA (1) ZA721234B (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301824A (en) * 1980-12-01 1981-11-24 General Motors Corporation Sump level maintenance system
US4310491A (en) * 1980-03-05 1982-01-12 Hitachi, Ltd. Apparatus for supplying raw liquid and relieving pressure of high-pressure product liquid
US4392784A (en) * 1980-10-28 1983-07-12 Pumpenfabrik Urach Valve arrangement for venting conduits and pumping system including the same
US4741398A (en) * 1986-12-30 1988-05-03 The United States Of America As Represented By The United States Department Of Energy Hydraulic accumulator-compressor for geopressured enhanced oil recovery
US5249932A (en) * 1991-10-07 1993-10-05 Erik Van Bork Apparatus for controlling diaphragm extension in a diaphragm metering pump
US6095178A (en) * 1997-09-15 2000-08-01 U.S. Army Corps Of Engineers As Represented By The Secretary Of The Army System for monitoring and controlling the level of a liquid in a closed container
US20110120577A1 (en) * 2009-11-23 2011-05-26 Nuccorp, Inc. Nuclear Grade Air Accumulation, Indication and Venting Device
US20110135514A1 (en) * 2008-08-14 2011-06-09 Spx Flow Technology Norderstedt Gmbh Pump Device
US20150252944A1 (en) * 2014-03-06 2015-09-10 Skf Lubrication Systems Germany Gmbh Lubricating system for a bearing, bearing including a lubricating system, and method for lubricating a bearing
US20160327032A1 (en) * 2013-12-18 2016-11-10 Mhwirth Gmbh Hot slurry pump

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5273102U (fr) * 1975-11-25 1977-06-01
JPS56147217U (fr) * 1980-04-07 1981-11-06
EP0343773B1 (fr) * 1988-03-23 1993-11-18 Kabushiki Kaisha Little Rock Pompe pour fluide et dispositif de clapet
US4963077A (en) * 1989-02-07 1990-10-16 Dresser Industries, Inc. Profiled plunger for a reciprocating pump
WO1993011361A1 (fr) * 1991-12-04 1993-06-10 Horwood Bagshaw Australia Limited Pompe
NL1004890C2 (nl) * 1996-12-24 1998-06-25 Envirotech Pumpsystems Netherl Pompsysteem in het bijzonder geschikt voor het verpompen van hete media.
US6375432B1 (en) * 2000-12-20 2002-04-23 Schwing America, Inc. Pipeline air pocket detection system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342798A (en) * 1917-10-23 1920-06-08 Farrand Dudley Pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342798A (en) * 1917-10-23 1920-06-08 Farrand Dudley Pump

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310491A (en) * 1980-03-05 1982-01-12 Hitachi, Ltd. Apparatus for supplying raw liquid and relieving pressure of high-pressure product liquid
US4392784A (en) * 1980-10-28 1983-07-12 Pumpenfabrik Urach Valve arrangement for venting conduits and pumping system including the same
US4301824A (en) * 1980-12-01 1981-11-24 General Motors Corporation Sump level maintenance system
US4741398A (en) * 1986-12-30 1988-05-03 The United States Of America As Represented By The United States Department Of Energy Hydraulic accumulator-compressor for geopressured enhanced oil recovery
US5249932A (en) * 1991-10-07 1993-10-05 Erik Van Bork Apparatus for controlling diaphragm extension in a diaphragm metering pump
US6095178A (en) * 1997-09-15 2000-08-01 U.S. Army Corps Of Engineers As Represented By The Secretary Of The Army System for monitoring and controlling the level of a liquid in a closed container
US20110135514A1 (en) * 2008-08-14 2011-06-09 Spx Flow Technology Norderstedt Gmbh Pump Device
US20110120577A1 (en) * 2009-11-23 2011-05-26 Nuccorp, Inc. Nuclear Grade Air Accumulation, Indication and Venting Device
US8505568B2 (en) * 2009-11-23 2013-08-13 Nuccorp, Inc. Nuclear grade air accumulation, indication and venting device
US20160327032A1 (en) * 2013-12-18 2016-11-10 Mhwirth Gmbh Hot slurry pump
US20150252944A1 (en) * 2014-03-06 2015-09-10 Skf Lubrication Systems Germany Gmbh Lubricating system for a bearing, bearing including a lubricating system, and method for lubricating a bearing
US10088100B2 (en) * 2014-03-06 2018-10-02 Aktiebolaget Skf Lubricating system for a bearing, bearing including a lubricating system, and method for lubricating a bearing

Also Published As

Publication number Publication date
DE2218781A1 (de) 1973-01-11
JPS5018604B1 (fr) 1975-07-01
CA967427A (en) 1975-05-13
AU451139B2 (en) 1974-07-08
ZA721234B (en) 1972-11-29
GB1337875A (en) 1973-11-21
AU3900372A (en) 1973-08-16

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