EP0105877B1 - Pump for liquids and gases - Google Patents
Pump for liquids and gases Download PDFInfo
- Publication number
- EP0105877B1 EP0105877B1 EP83900580A EP83900580A EP0105877B1 EP 0105877 B1 EP0105877 B1 EP 0105877B1 EP 83900580 A EP83900580 A EP 83900580A EP 83900580 A EP83900580 A EP 83900580A EP 0105877 B1 EP0105877 B1 EP 0105877B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- slide
- pump
- plunger piston
- piston
- working
- 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
Links
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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
- F04B9/103—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 only one pumping chamber
- F04B9/105—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 only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting liquid motor
-
- 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
- F04B47/04—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
Definitions
- the invention relates to a pump of the kind described in the introductory part of claim 1, particularly for immersing into a well hole.
- GB-A-595 223 discloses a liquid pressure operated pump which comprises a casing with a cylinder in which a double acting piston is reciprocally movable. Between the piston and the cylinder are provided two working chambers for movement of the piston. Separated from said cylinder and plunger arrangement there is provided a pump for supplying working fluid into the cylinder and into one of the working chambers in order to move the piston. Interposed in the supplying conduits for the working fluid is arranged a slide valve for selectably supplying said working fluid to one of said working chambers. The slide valve is operable in response to the pressure of the working fluid supplied to the casing of the pump and is changing from one operating position into the other in response of an increase of the pressure of the working fluid.
- GB-A-1 023 444 discloses a control system for a hydraulic operated engine in which an engine and pump unit comprises an engine piston which is reciprocally movable in a housing.
- the piston is provided with an axial hole through which the fluid to be pumped can be displaced into a tubing arranged axially to the piston.
- the movement of the piston is controlled by an engine valve unit which is arranged separately to the piston and housing arrangement and which is connected therewith by means of a plurality of conduits for supplying working pressure of a working fluid to the respective working chambers of the piston.
- the working fluid is strictly separated from the fluid to be pumped by a working fluid circuit.
- the engine valve unit is provided with an engine valve which is reciprocally movable in a housing and which is movable between a plurality of working positions in dependency of the pressure of the working fluid supplied to the working chambers of the piston and housing arrangement of the engine and pump unit. Therefore said control system requires a plurality of different conduits for the working fluid which are rather complicated and very costly in manufacturing.
- a further disadvantageous aspect lies in the fact that there is the danger of shutting up one of said conduits due to pollution of the working fluid. This would also lead to a breakdown of the operation of the control system.
- the object underlying the present invention is to provide a pump of the above mentioned type which may be used in narrow well holes and on any depth, which is failsafe in operation, which can be manufactured under low costs and in which also a manual operation should be possible.
- the slide valve is reciprocally movable between its operation positions by direct engagement with the plunger piston.
- a pump of this kind may be operated by hand and can be utilised in relatively deep holes, down to 3000-4000 m. This makes it possible to have water accessible at reasonable costs in areas previously without this possibility.
- FIG. 1 In Figure 1 is shown a pump 11 which is immersed in a hole 12.
- the pump 11 has connections to the surface through a supply conduit 13 and an outlet conduit 14. These may preferably be integrated and made of a plastic material.
- a hand operated feeding pump 15 with a handle 16 operating a single acting piston 17 in a cylinder 18.
- the inlet opening for starting up fluid and the valves necessary may be of known kind and are not shown.
- a water reservoir 19 Integrated with the hand pump 15 is a water reservoir 19, this being emptied through an outlet pipe 20.
- a partition wall 21 In the reservoir 19 is arranged a partition wall 21 to ensure water supply through the feeding pump 15.
- This plant is adopted for use in areas wherein the technical and/or economical base for a motor driven feeding pump is missing. This may be the case in several economically underdeveloped rural areas in the world.
- the pump 11 may however well be operated with water supplied from a motor powered feeding pump.
- FIG 2 it is shown an axial section through an embodiment of the pump 11. This is adopted for immersing into a hole with diameter 45-60 mm.
- the pump in this embodiment has a generally pipe shaped casing 22 provided with an inlet filter 24 being screw fitted into the casing.
- the inlet filter is provided with holes 25 at the side.
- a longitudinal channel or conduit 29 is arranged down from the upper edge. Space for the conduit 29 has been provided by arranging the cylinder bore 23 somewhat excentrical, making a part 30 of the wall with larger thickness.
- the conduit 29 is substantially narrower than the cylinder bore 23, in the same way as the supply conduit 13 is more narrow than the outlet conduit 14.
- the area relationship between the two sections may e.g. be 1,6 at shallow holes and 1:1,5 at deeper.
- the two conduits 13 and 14 are connected to the conduit 29 and the cylinder 23 resp. with two junctions 31, resp. 32.
- the main part of the pump 11 in the shown embodiment is a combined operating- and pump- piston, in the following named plunger piston 33, which will be described further.
- the supply of working medium from the supply conduit 13 to the plunger piston 33 through the conduit 29 is in the embodiment shown controlled by a slide valve 34, which acts as a reversing valve and which will be further described.
- the plunger piston 33 consists of two separate pistons, an upper 35 and a lower 36 one, being connected through a common, hollow piston rod 37.
- the piston rod 37 is journalled by a partition wall 38, creating a working chamber on each side of it, respectively a higher one 39 and a lower one 40.
- the upper chamber 39 is connected to the slide valve 34 through a conduit 41 and the lower chamber 40 over a conduit 42, the conduits 41 and 42 are extending through the casing 22.
- the plunger piston 33 On supplying working medium through the conduits 41 and 42 respectively, the plunger piston 33 will move up and down in the cylinder. The control of the supply will be described further. At this movement the plunger piston 33 will act as a pump piston. At the upper end of an axial, concentrical bore 43 through the plunger piston 33 a kickback valve 44 is arranged. The kickback valve 44 will let through water when the piston 33 is moving downwards.
- the reversing or slide valve 34 comprises a slide 45 with an annular groove which can connect the supply conduit 29 with the conduit 41 in a lower position and the conduit 42 in an upper position. The other of the two conduits 41 and 42 respectively then is opened to the cylinder 23 with connection to the outlet conduit 14. This means that working medium supplied to the chambers 39 and 40 exits together with water pumped by the plunger piston 33.
- the slide 45 is moved a short distance upwards at the end of the corresponding movement of the piston 33 and correspondingly downwards at the end of the downwards movement of the piston 33.
- the movement upwards is effected by a direct thrust between the two parts, a coil spring 49 being arranged in between.
- the movement downwards is effected by a pipelike rod 47 attached at the end of a central bore through the slide 45 by threads.
- the rod 47 extends down to the bore 43 and is provided with a radial flange 51 at the free end.
- the bore 43 has a flange 52 at the upper end, extending radially over the flange 51.
- a coil spring 50 At the end of the rod 47 there is arranged a coil spring 50 to suppress the shock of a force transferred between the two flanges 51 and 52.
- a spring biased ball 53 in a radial bore 54. This is extending sidewards from the slide 45 and is engaging one or another of an upper and a lower annular groove 55 and 56 respectively, with a mutual distance corresponding to the movement of the slide 45.
- the ball 53 may also have another biasing member, alternatively.
- the slide 45 is provided with an annular groove 57 with outlets 58 radially to the bore 48 through the slide.
- the partition wall 38 which can be prepared of a plastic material, may be inserted between an upper and a lower part of the casing 22, which are connected by threads.
- the lower piston 36, enclosing the valve 44 is suitably connected to the lower end of the piston rod 37 by threads.
- the pump according to the invention may be manufactured of different materials.
- the most parts may be moulded or otherwise prepared from a plastic material.
- metal e.g., aluminium, for some parts.
- the pump in the shown embodiment is also provided with sealings and other sealants of known kind.
- the reversing valve shown as a slide valve 34 can be a pressure operated valve arranged in the wall 30 or at the feeding pump 15. In the last case an additional supply conduit to the piston 33 will be necessary.
- the pump may also be provided with a different form of slide valve 34, being provided with three annular grooves, enabling an additional outlet conduit for the operating medium.
- slide valve 34 being provided with three annular grooves, enabling an additional outlet conduit for the operating medium.
- the pump according to the invention can also be arranged with several operating units combined.
- two pistons of the shown kind can be arranged in the compound in the casing 22, the conduits 41 and 42 being connected to a lower, respectively an upper operating chamber for such a compound piston.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
- The invention relates to a pump of the kind described in the introductory part of claim 1, particularly for immersing into a well hole.
- From US-A-1 557 116 there is known a pump, wherein the supply of working medium to the operating piston is controlled by a pilot valve arranged in a valve chamber. The pump is arranged remotely from a hydraulic linear motor in a separate cylinder. This decreases the efficiency and increases the number of parts and the time for manufacturing. This known pump thus has a disadvantageous costs-output ratio and can not be used for manual operation.
- GB-A-595 223 discloses a liquid pressure operated pump which comprises a casing with a cylinder in which a double acting piston is reciprocally movable. Between the piston and the cylinder are provided two working chambers for movement of the piston. Separated from said cylinder and plunger arrangement there is provided a pump for supplying working fluid into the cylinder and into one of the working chambers in order to move the piston. Interposed in the supplying conduits for the working fluid is arranged a slide valve for selectably supplying said working fluid to one of said working chambers. The slide valve is operable in response to the pressure of the working fluid supplied to the casing of the pump and is changing from one operating position into the other in response of an increase of the pressure of the working fluid. This results that the working fluid is supplied to the other one of said two working chambers and in that the piston is moved in a reciprocal direction. Said arrangement is provided with the drawback that the operation control of the pump is only possible in dependency of the pressure of the working fluid. Variations in said pressure or a decrease of said pressure under a predetermined value would result in a breakdown of the operation of the pump.
- GB-A-1 023 444 discloses a control system for a hydraulic operated engine in which an engine and pump unit comprises an engine piston which is reciprocally movable in a housing. The piston is provided with an axial hole through which the fluid to be pumped can be displaced into a tubing arranged axially to the piston. The movement of the piston is controlled by an engine valve unit which is arranged separately to the piston and housing arrangement and which is connected therewith by means of a plurality of conduits for supplying working pressure of a working fluid to the respective working chambers of the piston. The working fluid is strictly separated from the fluid to be pumped by a working fluid circuit. The engine valve unit is provided with an engine valve which is reciprocally movable in a housing and which is movable between a plurality of working positions in dependency of the pressure of the working fluid supplied to the working chambers of the piston and housing arrangement of the engine and pump unit. Therefore said control system requires a plurality of different conduits for the working fluid which are rather complicated and very costly in manufacturing. A further disadvantageous aspect lies in the fact that there is the danger of shutting up one of said conduits due to pollution of the working fluid. This would also lead to a breakdown of the operation of the control system.
- The object underlying the present invention is to provide a pump of the above mentioned type which may be used in narrow well holes and on any depth, which is failsafe in operation, which can be manufactured under low costs and in which also a manual operation should be possible.
- According to the invention, this may be achieved by the pump constructed according to the characterizing part of claim 1.
- According to the invention, the slide valve is reciprocally movable between its operation positions by direct engagement with the plunger piston. This brings the advantage that the control of the pump is independent upon the pressure of the working fluid supplied to the pump. Variations of the pressure of said working fluid do therefore not cause a breakdown of the operation of the pump. A further advantage lies in the fact that the working fluid is of the same kind as the fluid to be pumped so that in general only two movable parts are necessary, namely the plunger piston and the slide valve which leads to lower manufacturing costs and which causes a failsafe operation of the pump.
- Further advantageous details are stated in the subclaims.
- A pump of this kind may be operated by hand and can be utilised in relatively deep holes, down to 3000-4000 m. This makes it possible to have water accessible at reasonable costs in areas previously without this possibility.
- The invention will be further described with reference to the drawings, wherein:
- Figure 1 shows schematically a water supply plant with a pump according to the invention immersed in a hole drilled in the ground.
- Figure 2 shows an axial section A-A in Figure 4 through an embodiment of a pump according to the invention,
- Figure 3 shows an axial section B-B in Figure 4 of a part of the pump in Figure 2, while
- Figure 4 shows a section C-C through the pump of Figure 2.
- In Figure 1 is shown a
pump 11 which is immersed in a hole 12. Thepump 11 has connections to the surface through asupply conduit 13 and anoutlet conduit 14. These may preferably be integrated and made of a plastic material. - For the supply of working medium, in this example water, it is in the shown embodiment used a hand operated
feeding pump 15 with ahandle 16 operating a single acting piston 17 in acylinder 18. The inlet opening for starting up fluid and the valves necessary may be of known kind and are not shown. Integrated with thehand pump 15 is awater reservoir 19, this being emptied through anoutlet pipe 20. In thereservoir 19 is arranged apartition wall 21 to ensure water supply through thefeeding pump 15. - This plant is adopted for use in areas wherein the technical and/or economical base for a motor driven feeding pump is missing. This may be the case in several economically underdeveloped rural areas in the world. The
pump 11 may however well be operated with water supplied from a motor powered feeding pump. - In Figure 2 it is shown an axial section through an embodiment of the
pump 11. This is adopted for immersing into a hole with diameter 45-60 mm. The pump in this embodiment has a generally pipe shapedcasing 22 provided with aninlet filter 24 being screw fitted into the casing. The inlet filter is provided withholes 25 at the side. With anend wall 26 provided with a one- way-valve 27, aninlet chamber 28 is enclosed inside theinlet filter 24. - At one side of the casing 22 a longitudinal channel or
conduit 29 is arranged down from the upper edge. Space for theconduit 29 has been provided by arranging the cylinder bore 23 somewhat excentrical, making apart 30 of the wall with larger thickness. Theconduit 29 is substantially narrower than thecylinder bore 23, in the same way as thesupply conduit 13 is more narrow than theoutlet conduit 14. The area relationship between the two sections may e.g. be 1,6 at shallow holes and 1:1,5 at deeper. The twoconduits conduit 29 and thecylinder 23 resp. with twojunctions 31, resp. 32. - The main part of the
pump 11 in the shown embodiment is a combined operating- and pump- piston, in the following namedplunger piston 33, which will be described further. The supply of working medium from thesupply conduit 13 to theplunger piston 33 through theconduit 29 is in the embodiment shown controlled by aslide valve 34, which acts as a reversing valve and which will be further described. Theplunger piston 33 consists of two separate pistons, an upper 35 and a lower 36 one, being connected through a common,hollow piston rod 37. Thepiston rod 37 is journalled by apartition wall 38, creating a working chamber on each side of it, respectively a higher one 39 and a lower one 40. Theupper chamber 39 is connected to theslide valve 34 through aconduit 41 and the lower chamber 40 over aconduit 42, theconduits casing 22. - On supplying working medium through the
conduits plunger piston 33 will move up and down in the cylinder. The control of the supply will be described further. At this movement theplunger piston 33 will act as a pump piston. At the upper end of an axial,concentrical bore 43 through the plunger piston 33 akickback valve 44 is arranged. Thekickback valve 44 will let through water when thepiston 33 is moving downwards. The reversing orslide valve 34 comprises aslide 45 with an annular groove which can connect thesupply conduit 29 with theconduit 41 in a lower position and theconduit 42 in an upper position. The other of the twoconduits cylinder 23 with connection to theoutlet conduit 14. This means that working medium supplied to thechambers 39 and 40 exits together with water pumped by theplunger piston 33. - The
slide 45 is moved a short distance upwards at the end of the corresponding movement of thepiston 33 and correspondingly downwards at the end of the downwards movement of thepiston 33. The movement upwards is effected by a direct thrust between the two parts, acoil spring 49 being arranged in between. - The movement downwards is effected by a
pipelike rod 47 attached at the end of a central bore through theslide 45 by threads. Therod 47 extends down to thebore 43 and is provided with aradial flange 51 at the free end. In order to have cooperations between thisflange 51 and thepiston 33, thebore 43 has aflange 52 at the upper end, extending radially over theflange 51. At the end of therod 47 there is arranged acoil spring 50 to suppress the shock of a force transferred between the twoflanges - To keep the
slide 45 in certain end positions, it is provided with a spring biasedball 53 in aradial bore 54. This is extending sidewards from theslide 45 and is engaging one or another of an upper and a lowerannular groove 55 and 56 respectively, with a mutual distance corresponding to the movement of theslide 45. Theball 53 may also have another biasing member, alternatively. - To let water from the
conduit 42 into thecylinder 23, theslide 45 is provided with anannular groove 57 withoutlets 58 radially to thebore 48 through the slide. - The
partition wall 38, which can be prepared of a plastic material, may be inserted between an upper and a lower part of thecasing 22, which are connected by threads. The lower piston 36, enclosing thevalve 44 is suitably connected to the lower end of thepiston rod 37 by threads. - The pump according to the invention may be manufactured of different materials. The most parts may be moulded or otherwise prepared from a plastic material. When manufactured for use on larger depths it may be suitable to use metal e.g., aluminium, for some parts.
- The pump in the shown embodiment is also provided with sealings and other sealants of known kind.
- Different details in the shown embodiment can be modified. The reversing valve shown as a
slide valve 34 can be a pressure operated valve arranged in thewall 30 or at the feedingpump 15. In the last case an additional supply conduit to thepiston 33 will be necessary. - The pump may also be provided with a different form of
slide valve 34, being provided with three annular grooves, enabling an additional outlet conduit for the operating medium. When using such a valve it will be possible to operate the working piston with a medium different from that to be pumped. - The pump according to the invention can also be arranged with several operating units combined. E.g. two pistons of the shown kind can be arranged in the compound in the
casing 22, theconduits
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT83900580T ATE29558T1 (en) | 1982-02-15 | 1983-02-15 | PUMP FOR LIQUIDS AND GASES. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO820431A NO150371C (en) | 1982-02-15 | 1982-02-15 | PUMP FOR LIQUID AND GAS |
NO820431 | 1982-02-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0105877A1 EP0105877A1 (en) | 1984-04-25 |
EP0105877B1 true EP0105877B1 (en) | 1987-09-09 |
Family
ID=19886432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83900580A Expired EP0105877B1 (en) | 1982-02-15 | 1983-02-15 | Pump for liquids and gases |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0105877B1 (en) |
JP (1) | JPS59500179A (en) |
AU (1) | AU1159283A (en) |
DE (1) | DE3373517D1 (en) |
DK (1) | DK159857B (en) |
FI (1) | FI72784C (en) |
NO (1) | NO150371C (en) |
WO (1) | WO1983002805A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106869234A (en) * | 2017-01-18 | 2017-06-20 | 瑞安市智造科技有限公司 | A kind of macromechanical is fetched water device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA836613B (en) * | 1982-09-09 | 1984-04-25 | Donald Ian Guy Macleod | Hydraulically actuated bore and well pump |
JP6661337B2 (en) * | 2015-11-19 | 2020-03-11 | 株式会社川本製作所 | Combined pump |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB595223A (en) * | 1944-07-22 | 1947-11-28 | Alco Valve Co | Liquid pressure operated pump |
GB906732A (en) * | 1960-04-22 | 1962-09-26 | Kobe Inc | Improvements in or relating to well pumps |
GB1023444A (en) * | 1962-10-24 | 1966-03-23 | Kobe Inc | Control system for a hydraulically operated engine |
-
1982
- 1982-02-15 NO NO820431A patent/NO150371C/en unknown
-
1983
- 1983-02-15 WO PCT/NO1983/000005 patent/WO1983002805A1/en active IP Right Grant
- 1983-02-15 EP EP83900580A patent/EP0105877B1/en not_active Expired
- 1983-02-15 AU AU11592/83A patent/AU1159283A/en not_active Abandoned
- 1983-02-15 JP JP83500659A patent/JPS59500179A/en active Granted
- 1983-02-15 DE DE8383900580T patent/DE3373517D1/en not_active Expired
- 1983-10-11 DK DK466783A patent/DK159857B/en not_active Application Discontinuation
- 1983-10-14 FI FI833737A patent/FI72784C/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106869234A (en) * | 2017-01-18 | 2017-06-20 | 瑞安市智造科技有限公司 | A kind of macromechanical is fetched water device |
Also Published As
Publication number | Publication date |
---|---|
DK159857B (en) | 1990-12-17 |
DE3373517D1 (en) | 1987-10-15 |
WO1983002805A1 (en) | 1983-08-18 |
FI72784B (en) | 1987-03-31 |
FI72784C (en) | 1987-07-10 |
JPS59500179A (en) | 1984-02-02 |
EP0105877A1 (en) | 1984-04-25 |
DK466783D0 (en) | 1983-10-11 |
NO820431L (en) | 1983-08-16 |
JPH0380993B2 (en) | 1991-12-26 |
DK466783A (en) | 1983-10-11 |
NO150371B (en) | 1984-06-25 |
AU1159283A (en) | 1983-08-25 |
NO150371C (en) | 1984-10-03 |
FI833737A0 (en) | 1983-10-14 |
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