EP0410923A1 - Pump arrangement for pumping liquid by means of compressed air - Google Patents
Pump arrangement for pumping liquid by means of compressed air Download PDFInfo
- Publication number
- EP0410923A1 EP0410923A1 EP90610047A EP90610047A EP0410923A1 EP 0410923 A1 EP0410923 A1 EP 0410923A1 EP 90610047 A EP90610047 A EP 90610047A EP 90610047 A EP90610047 A EP 90610047A EP 0410923 A1 EP0410923 A1 EP 0410923A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pump chamber
- liquid
- pump arrangement
- inlet opening
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
Definitions
- the present invention relates to a pump arrangement of the kind described in the introduction to claim 1.
- the pump arrangement according to the invention is open during the whole throughput action it can also pump liquids containing large objects such as plastics bags, rope ends and the like. Furthermore, it can be used to pump water containing live fish.
- Claim 2 deals with an embodiment of the pump chamber of a pump arrangement according to the invention.
- Claim 3 deals with another embodiment of the pump chamber of a pump arrangement according to the invention.
- Claim 4 deals with a pump arrangement according to the invention in which the pump acts as a liquid pump.
- Claim 5 deals with a pump arrangement in which the pump preferably pumps sludge from a sludgy liquid.
- a pump arrangement has a pump chamber 1, with an inlet opening 2 and a discharge opening 3.
- a discharge pipe 4 preferably by a U-shaped bend 5.
- a supply pipe 6 for compressed air is connected to the top part of the pump chamber 1.
- the compressed air can be supplied from a blower 7 so that compressed air is pumped into the pump arrangement when a magnet valve 8 is closed.
- the pump arrangement is aired, when the valve 8 is open.
- the valve 8 can be activated in various ways, e.g. by a not shown level sensor in the discharge pipe 4.
- the pump arrangement can also be spring suspended and designed so that it can activate a not shown limit switch in a bottom position, when it is filled with liquid, and in a top position, when it is emptied of liquid.
- an inlet pipe 9 Connected to the inlet opening 2 to the pump chamber 1 is an inlet pipe 9, reaching from the inlet opening 2 down into the liquid to a level where the pressure head H is higher than the pressure head of the pump arrangement and which is preferably lower than the lowest part of the pump chamber.
- the inlet pipe 9 can also - as shown at the bottom of fig. 2 - enter a pump well 11 from which the pump arrangement pumps liquid.
- the pump arrangement can in this case be buried in the ground.
- the valve 8 When the pump chamber 1 is filled with liquid and a corresponding liquid level in the discharge pipe 4 is reached, the valve 8 will close and the blower 7 will force compressed air into the pump chamber.
- the blower 7 can either be in continuous operation, or it can be connected to the control system for the valve 8, so that it stops when the valve 8 is open.
- the pump arrangement can also be used as a flow meter.
- Such a pump can send a signal to another pump, which can be a dosing pump for chemicals.
- the pump chamber 1 can be embodied as an oblong, preferably cylindrical, pipe oriented with a backward slope from the inlet opening 2 towards the discharge opening 3. This gives the pump with the inlet pipe 9, the pump chamber, and the discharge pipe 4 the shape of an N.
- the pump chamber 1 may also - as shown in fig. 2 - have the shape of an oblong, preferably cylindrical, pipe with a horizontal position.
- the lower edge 10 of the inlet opening 2 is placed at a higher level than the upper edge 12 of the pump chamber 1.
- the pump arrangement then functions as a liquid pump.
- the pump arrangement can thus be used for cleaning of waste water for sludge.
- the pump chamber shown in fig. 1 can be embodied with a beginning part with an inclined downward slope and then with a horizontal part and then with a part inclined downwards.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
- The present invention relates to a pump arrangement of the kind described in the introduction to
claim 1. - Such pump arrangements are known e.g. from the description of Norwegian patent No. 4.100, French patents Nos. 806.643 and 1.033.695 and U.S.A. patent No. 1.072.562.
- These known pumps all have a valve on the inlet side which closes when compressed air is blown into the pump chamber.
- It is the purpose of the present invention to describe a pump in which the said valve in the inlet can be omitted, thus making the pump more simple in its construction and more robust and dependable than known pumps. This is achieved by shaping the pump as shown in the characterizing part of
claim 1. - As the pump arrangement according to the invention is open during the whole throughput action it can also pump liquids containing large objects such as plastics bags, rope ends and the like. Furthermore, it can be used to pump water containing live fish.
-
Claim 2 deals with an embodiment of the pump chamber of a pump arrangement according to the invention. -
Claim 3 deals with another embodiment of the pump chamber of a pump arrangement according to the invention. -
Claim 4 deals with a pump arrangement according to the invention in which the pump acts as a liquid pump. -
Claim 5 deals with a pump arrangement in which the pump preferably pumps sludge from a sludgy liquid. - The invention will be explained in detail below with reference to the drawing in which
- fig 1 is a schematic embodiment of a pump arrangement according to the invention, and
- fig. 2 is a schematic drawing of another embodiment of a pump arrangement according to the invention.
- As shown in the drawing a pump arrangement according to the invention has a
pump chamber 1, with an inlet opening 2 and adischarge opening 3. To the discharge opening is connected adischarge pipe 4, preferably by aU-shaped bend 5. Asupply pipe 6 for compressed air is connected to the top part of thepump chamber 1. By way of example the compressed air can be supplied from ablower 7 so that compressed air is pumped into the pump arrangement when a magnet valve 8 is closed. The pump arrangement is aired, when the valve 8 is open. The valve 8 can be activated in various ways, e.g. by a not shown level sensor in thedischarge pipe 4. The pump arrangement can also be spring suspended and designed so that it can activate a not shown limit switch in a bottom position, when it is filled with liquid, and in a top position, when it is emptied of liquid. - Connected to the inlet opening 2 to the
pump chamber 1 is aninlet pipe 9, reaching from the inlet opening 2 down into the liquid to a level where the pressure head H is higher than the pressure head of the pump arrangement and which is preferably lower than the lowest part of the pump chamber. - The
inlet pipe 9 can also - as shown at the bottom of fig. 2 - enter a pump well 11 from which the pump arrangement pumps liquid. The pump arrangement can in this case be buried in the ground. - When the valve 8 is open liquid will be forced through the
inlet pipe 9 into thepump chamber 1. - When the
pump chamber 1 is filled with liquid and a corresponding liquid level in thedischarge pipe 4 is reached, the valve 8 will close and theblower 7 will force compressed air into the pump chamber. - As the pressure head H at the bottom of the inlet pipe is higher than the pressure head h of the pump arrangement the supplied compressed air will force the liquid out of the
pump chamber 1 and out through thedischarge pipe 4. - When the pump arrangement is emptied of liquid a sensor - which by way of example could be placed in the discharge pipe - will register this, and the valve 8 will close. Then another volume of liquid will be forced into the pump chamber.
- The consumption of air is only a few per cent higher than the volume of liquid being pumped. If a volume of liquid of 1 m3 is to be raised 1 m, a blower effect of 8W is needed. This effect is essentially lower than for known pumps.
- The
blower 7 can either be in continuous operation, or it can be connected to the control system for the valve 8, so that it stops when the valve 8 is open. - As a filed quantity of liquid is discharged, depending on the dimensions of the pump arrangement, for each pump stroke, the pump arrangement can also be used as a flow meter. Such a pump can send a signal to another pump, which can be a dosing pump for chemicals.
- As shown in fig. 1 the
pump chamber 1 can be embodied as an oblong, preferably cylindrical, pipe oriented with a backward slope from the inlet opening 2 towards thedischarge opening 3. This gives the pump with theinlet pipe 9, the pump chamber, and thedischarge pipe 4 the shape of an N. - The
pump chamber 1 may also - as shown in fig. 2 - have the shape of an oblong, preferably cylindrical, pipe with a horizontal position. - With the embodiment shown in the figure the
lower edge 10 of theinlet opening 2 is placed at a higher level than theupper edge 12 of thepump chamber 1. The pump arrangement then functions as a liquid pump. - If the
lower edge 10 of theinlet opening 2 is moved down to a level which is lower than the upper edge of thepump chamber 1, but higher than the pump chamber'slower edge 13, part of the liquid supplied to the pump chamber will be taken back to theinlet pipe 9 during the pump stroke. If the fluid being pumped is sludgy the sludge which collects on the bottom of thepump chamber 1 will thus be pumped away through thedischarge pipe 4, whereas pure liquid will be taken back to theinlet pipe 9. - In the described embodiment the pump arrangement can thus be used for cleaning of waste water for sludge.
- Within the framework of the invention there may be other embodiments of the invention. For example the pump chamber shown in fig. 1 can be embodied with a beginning part with an inclined downward slope and then with a horizontal part and then with a part inclined downwards.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK3658/89 | 1989-07-25 | ||
DK365889A DK162460C (en) | 1989-07-25 | 1989-07-25 | PUMP DEVICE FOR PUMPING FLUID USING AIR PRESSURE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0410923A1 true EP0410923A1 (en) | 1991-01-30 |
EP0410923B1 EP0410923B1 (en) | 1993-03-17 |
Family
ID=8125355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900610047 Expired - Lifetime EP0410923B1 (en) | 1989-07-25 | 1990-07-17 | Pump arrangement for pumping liquid by means of compressed air |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0410923B1 (en) |
DE (1) | DE69001104T2 (en) |
DK (1) | DK162460C (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB241960A (en) * | 1924-04-22 | 1925-10-22 | Charles Bates | Improved apparatus for raising water, sewage, sand, and the like |
GB245238A (en) * | 1924-11-06 | 1926-01-07 | Samuel Henry Adams | Improvements in hydro pneumatic ejectors |
FR806643A (en) * | 1935-05-22 | 1936-12-21 | Flottmannkonzern G M B H | Method for lifting liquids, applicable in particular in tube wells and devices allowing implementation |
DE960250C (en) * | 1954-07-04 | 1957-03-21 | Dipl Berging Otto Vedder | Compressed air-operated, float-controlled liquid lifter designed as a suction pump |
FR2227448A1 (en) * | 1973-04-30 | 1974-11-22 | Ecodyne Corp |
-
1989
- 1989-07-25 DK DK365889A patent/DK162460C/en not_active IP Right Cessation
-
1990
- 1990-07-17 EP EP19900610047 patent/EP0410923B1/en not_active Expired - Lifetime
- 1990-07-17 DE DE1990601104 patent/DE69001104T2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB241960A (en) * | 1924-04-22 | 1925-10-22 | Charles Bates | Improved apparatus for raising water, sewage, sand, and the like |
GB245238A (en) * | 1924-11-06 | 1926-01-07 | Samuel Henry Adams | Improvements in hydro pneumatic ejectors |
FR806643A (en) * | 1935-05-22 | 1936-12-21 | Flottmannkonzern G M B H | Method for lifting liquids, applicable in particular in tube wells and devices allowing implementation |
DE960250C (en) * | 1954-07-04 | 1957-03-21 | Dipl Berging Otto Vedder | Compressed air-operated, float-controlled liquid lifter designed as a suction pump |
FR2227448A1 (en) * | 1973-04-30 | 1974-11-22 | Ecodyne Corp |
Also Published As
Publication number | Publication date |
---|---|
DK162460C (en) | 1992-03-23 |
DE69001104D1 (en) | 1993-04-22 |
DK365889A (en) | 1991-01-26 |
EP0410923B1 (en) | 1993-03-17 |
DK365889D0 (en) | 1989-07-25 |
DE69001104T2 (en) | 1993-10-28 |
DK162460B (en) | 1991-10-28 |
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