EP0174750A1 - Pompe - Google Patents

Pompe Download PDF

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Publication number
EP0174750A1
EP0174750A1 EP85305787A EP85305787A EP0174750A1 EP 0174750 A1 EP0174750 A1 EP 0174750A1 EP 85305787 A EP85305787 A EP 85305787A EP 85305787 A EP85305787 A EP 85305787A EP 0174750 A1 EP0174750 A1 EP 0174750A1
Authority
EP
European Patent Office
Prior art keywords
pipe
piston assembly
way valve
riser pipe
pump
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.)
Withdrawn
Application number
EP85305787A
Other languages
German (de)
English (en)
Inventor
Sing Yau Goh
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.)
Universiti Malaya
Original Assignee
Universiti Malaya
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 Universiti Malaya filed Critical Universiti Malaya
Publication of EP0174750A1 publication Critical patent/EP0174750A1/fr
Withdrawn legal-status Critical Current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
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F04B47/024—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level actuated by muscle power
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/127—Disc valves
    • F04B53/128—Annular disc valves

Definitions

  • This invention relates to pumps required to lift water from a depth to be delivered to an elevated position or under pressure.
  • a delivery pipe (18 in 730,097 and 38 in 1,479,595) is branched off the riser pipe from a zone between the piston assemblies, and there is a one-way valve (28 in 730,097 and 32/33 in 1,479,595) in the riser pipe below the lower piston assembly.
  • a pump comprising a riser pipe; upper and lower piston assemblies fast on a common piston rod in the riser pipe, the lower piston assembly incorporating a one-way bypass; a delivery pipe branched off the riser pipe from a zone that is between the upper and lower piston assemblies; and a one-way valve that is in the riser pipe below the lower piston assembly; characterised in that said one-way valve is a first one-way valve, and in that there is a second one-way valve that is in the delivery pipe; the one-way bypass in the lower piston assembly and the one-way valves being set to open and close as fluid is pumped such that on each upstroke of the piston assemblies the one-way bypass and the one-way valve in the delivery pipe are closed and the one-way valve in the riser pipe is open so that by the action of the lower piston assembly fluid is drawn into the riser pipe through the one-way valve therein, and such that on each downstroke of the piston assemblies the one-way bypass and the one-way valve in the delivery pipe are
  • the second one-way valve in the delivery pipe serves to prevent water leaking back past the upper piston assembly, thus preventing flooding where the piston rod enters the riser pipe when the piston assemblies are stationary or operating at low piston speed.
  • the upper piston assembly is inactive during the upstroke, and fluid is delivered from the delivery pipe, by the action of the upper piston assembly, only during the downstroke, a stuffing box sealing the piston rod where it enters the riser pipe is not required, thus simplifying the construction.
  • the pump of Figure 1 is a force pump for raising water and delivering it to an elevated position, or under pressure.
  • a riser pipe 1 has a delivery pipe 2 branched off from a zone intermediate its ends, the two pipes 1, 2 depending from a mount 3.
  • the delivery pipe 2 Above the mount 3 the delivery pipe 2 has a connection 4 for receiving a pressure delivery pipe, and a delivery outlet 5 which is at an elevated position. Selection between pressure delivery, or de-livery at the outlet 5, is effected by making good the connection 4 and closing a hand-operated valve 6, or closing-off the connection 4 and opening the valve 6.
  • the mount 3 is supported from the ground by a stand 7.
  • the riser pipe 1 terminates at the mount 3.
  • a piston rod 8 having its upper end fast in a block 9 pivoted to an operating lever 10 passes through the mount 3 and into the riser pipe 1.
  • the operating lever 1C is pivotally supported by a post 11 upstanding from the mount 3.
  • the piston rod 8 carries upper and lower piston assemblies 12A, 12B, each fast with the rod so that they move together.
  • the upper piston assemply 12A operates above the zone at which the delivery pipe 2 is branched off the riser pipe 1.
  • the lower pistor assembly 12B operates below this zone.
  • At the top of the riser pipe 1 there is an overflow outlet 13.
  • a similar one-way foot valve assembly 14B is at the foot of the delivery pipe 2.
  • the piston assembly shown in Figure 3 is the lower assembly 12B.
  • a bolt 15 passed through the barrel 16 of the piston carries at its upper end a socket 17 in which is engaged the piston rod 8 (not shown in Figure 3).
  • the rod 8 is made fast in the socket 17 by a pin (not shown passed through a hole 18 in the socket 17, through a corresponding bore in the piston rod 8, and through a further hole in the socket 17.
  • Bolt and socket are locked relative to the barrel by lock nuts 19.
  • the upper piston assembly 12A is similar to the lower piston assembly 12B except that it has no through bores such as the bores 21 (and therefore no flap valve member) or the bores are permanently blocked off. Sockets such as the socket 17 are provided above and below the upper piston assembly 12A so that the assembly can be made fast between upper and lower runs of the piston rod E.
  • Each foct valve assembly 14A, 14B conveniently has a barrel 16' which is identical with the barrel 16 of the lower piston assembly 12B except that the piston rings are replaced by a double-tip seal 23 mounted in a groove that is provided intermediate the grooves that receive the piston rings when the barrel is to serve as the barrel of a piston assembly.
  • the through bores 21 and the flap valve member 22 form the valve assembly as a one-way valve.
  • a pin 24 is permanently mounted in the opposed holes in the socket 17 for receiving a hook (nct shown) if lowered down the pipe i or 2 for recovering the foct valve assembly.
  • the pipes 1 and 2 are of polyvinylchloride, solvent-welded together; the stand 7 is of mild steel; and the mount 3, block 9, lever 10 and support post 11 are of timber.
  • the barrel 16(16') of the piston assemblies and the foot valve assemblies are of polyvinylchloride; the piston rings 20 are of polyethylene; and the flap valve members 22 and the double-tip seal 23 are of natural or synthetic rubber.
  • the foot of the stand 7 When mounted for operation, as shown in Figure 1, the foot of the stand 7 is set in concrete 25 at ground level, and the riser pipe 1 extends down inside a casing pipe 26 to the water 27.
  • the foot valve assembly 14A at the foot of the riser pipe 1 is below water.
  • Operation is as follows from the condition lower piston assembly 12B at lowest position/no water above this assembly.
  • Lower piston assembly 12B rising with flap valve member 22 closed draws water into riser pipe 1 through the foot valve assembly 14A which opens to allow passage of water.
  • Foot valve assembly 14P is closed.
  • Flap valve member 22 cf lower piston assembly 12B opens so this assembly inactive. Foot valve assembly 14A closes. Upper piston assembly 12A active tc force water through foot valve assembly 14E and out through delivery pipe 2.
  • leakage rate past the sealing rings is directly proportional to the delivery water head.
  • the water flow rate past the rings of the upper piston assembly 12A is proportional to the delivery water head. This water accummulates above this piston assembly.
  • the water flow rate downwards past the rings of the lower piston assembly 12B is proportional to the lifted water head, whilst the water accummulated above the upper piston assembly 12A tends to flow back downwards past the rings of this assembly. If the rings of the two piston assemblies 12A, 12B are identical, progressive accummulation of water above the upper piston assembly 12A occurs but only when the delivery water head exceeds the lifted water head.
  • the overflow outlet 13 above the upper piston assembly 12A is provided. If, on the other hand, the delivery water head is less than the lifted water head, there is a negative accummulation of water above the upper piston assembly 12A, that is air from above this piston assembly flows downwards pas: the rings of the assembly during the upstrokes. Baring the downstrokes, this air is expelled upwards past the rings of the upper piston assembly 12A before the build-up of delivery pressure and no overflow outlet is therefore necessary for situations where the delivery water head is equal to or less than the lifted water head.
  • the rings of the lower piston assembly 12B may be made to have a better or worse sealing efficiency than those of the upper piston assembly 12A, for example by varying the thickness of material cf the rings or by rutting leakage grooves in the rings, tc compensate fcr the difference in leakage past the piston assemblies arising from a difference in lifted and delivery water heads.
  • An alternative "pressure-suction" configuration as shown in Figure 2 may be used to raise water from depths which are less than the "maximum suction depth” and to deliver the water to an elevated position or under pressure.
  • the majority of the components are as shown in the pump of Figure 1, as indicated by the use-of like numerals as used in Figure 1.
  • the riser pipe 1' in this pump has a full bore portion terminating some way above the bottom of the pipe 1', the pipe 1' being continued below the full bore portion by a portion 1'A of reduced diameter bore.
  • the foot valve 14A is disposed at the bottom of the full bore portion and the piston rod 8' is shorter than the piston rod 8 of the pump of Figure 1 so that the piston assembly 12B is accommodated above the portion 1' A of reduced diameter bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP85305787A 1984-08-17 1985-08-14 Pompe Withdrawn EP0174750A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8420909 1984-08-17
GB08420909A GB2163220B (en) 1984-08-17 1984-08-17 Pumps

Publications (1)

Publication Number Publication Date
EP0174750A1 true EP0174750A1 (fr) 1986-03-19

Family

ID=10565463

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85305787A Withdrawn EP0174750A1 (fr) 1984-08-17 1985-08-14 Pompe

Country Status (5)

Country Link
EP (1) EP0174750A1 (fr)
GB (1) GB2163220B (fr)
IN (1) IN165632B (fr)
MY (1) MY100511A (fr)
PH (1) PH25261A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3940101A1 (de) * 1989-12-04 1991-06-06 Hofmann Joerg Handbetaetigbare, doppelt wirkende dosier- und/oder zerstaeuberpumpe
WO1992012346A1 (fr) * 1991-01-10 1992-07-23 Mondesh Limited Pompes
CN102878043A (zh) * 2012-10-30 2013-01-16 海门市液压件厂有限责任公司 微耕机手动提升泵

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR10882E (fr) * 1909-10-21 Charles Cuau Pompe à cable équilibrée
FR621275A (fr) * 1926-09-11 1927-05-09 Pompe à vapeur
GB730097A (en) * 1952-04-09 1955-05-18 John B Pillin Ltd Double acting reciprocating pumps
FR1288221A (fr) * 1961-02-10 1962-03-24 Tecalemit Societe Pompe pneumatique pour le transvasement des liquides
GB2070697A (en) * 1980-03-03 1981-09-09 Polynergie 1980 Inc Fluid pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1479595A (en) * 1974-10-29 1977-07-13 Swindells J Pumps and lubricating devices including pumps

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR10882E (fr) * 1909-10-21 Charles Cuau Pompe à cable équilibrée
FR621275A (fr) * 1926-09-11 1927-05-09 Pompe à vapeur
GB730097A (en) * 1952-04-09 1955-05-18 John B Pillin Ltd Double acting reciprocating pumps
FR1288221A (fr) * 1961-02-10 1962-03-24 Tecalemit Societe Pompe pneumatique pour le transvasement des liquides
GB2070697A (en) * 1980-03-03 1981-09-09 Polynergie 1980 Inc Fluid pump

Also Published As

Publication number Publication date
PH25261A (en) 1991-03-27
IN165632B (fr) 1989-11-25
GB8420909D0 (en) 1984-09-19
GB2163220B (en) 1987-09-09
MY100511A (en) 1990-10-30
GB2163220A (en) 1986-02-19

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Inventor name: GOH, SING YAU