PUMP FOR LIQUIDS AND GASES

Abstract: Pump for liquids and gases, particularly for immersing in a well hole. A pump piston (35) is operated by a double acting operating piston (33) provided with working medium through a supply conduit (13). The supply of working medium to the respective sides of the operating piston (33) is controlled by a reversing valve (34). This has a slide (45) being operated by the operating piston (33).

Description: Pump for liquids and gases. The invention relates to an improved pump of the kind described in the introductory part claim 1, particularily for immersing into a well hole. From US-PS 1,557,116 it 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. Here the pump is arranged remotely from a hydroian liniear motor in a separate cylinder. This decreases the effici¬ ency and increases the number of parts and the tine for manufacturing. This known pump thus has a disadvantageous costs-output ratio and can not be used for manual opera¬ tion. The main purpose of the invention is to provide a pump which may be used in narrow well holes . and on any depth. On demand, 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. Further advantageous details are stated in the subclaims. A purp 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 aeras previously without this possibility. The invention will be further described with refer- ance to the drawings, wherein: Fig. 1 shows schematically a water supply plant with a pump according to the invention immersed in a hole drilled in the σround. O Fig. 2 shows an axial section A-A in fig.4 through an embodiment of a pump according to the invention, fig. 3 shows an axial section B-B in fig. 4 of a part of the pump in fig.2, while 5 fig. 4 shows a section C-C through the pump of fig.2. In fig.l it 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 lOmaterial. For the supply of working medium in this example water it is in the shown embodiment used a hand operated feeding pump 15 with a handle 16 operating a single act¬ ing piston 17 in a cylinder 18. The inlet opening for 15 starting up fluid and the valves necessary may be of known kind and are not shown. Integrated with the hand pump 15 is a water reservoar 19, this being emptied through an outlet pipe 20. In the reservoar 19 it is arran¬ ged a particion wall 21 to ensure water supply through 20 the feeding pump 15. This plant is adopted for use in areas the technical and/or economical base for a motor driven feeding pump is missing.This may be ^g case ± n several economically underdeveloped rural areas in the world. The pump 11 may 25 however well be operated with water supplied from a motor powered feeding pump. In fig. 2 it is shown an axial section through an embodiment og the pump 11. This Is adopted for Immersing into a hole with diameter 45-60 mm. The pump in this 0 embodiment has a generally pipe shaped casing 22 provided with an inlet filter being shrew fitted into the casing. The inlet filter Is provided with holes 25 at the side. l\'ith an end wall 25 provided with an one-way-valve 27, an inlet chamber 28 Is enclosed inside the inlet filter 24. 35 At one side of the casing 22 a longitudinal channel or conduit 29 is arranged dow τ n from the upper edge. Space for the conduit 29 has been provided by arranging the cylinder bore 23 somewhat exentrical , 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 shellow 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 embodi- ent is a combined operating- and pumppiston, in the following named plunger piston 33, which will be ^described further. The supply of orking 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 an reversing valve and which will be further described. The plunger piston 33 consists of two separate pistons, an upper 35 and a lower 36, being connected through a common, hollow piston rod. The piston rod 37 Is journaled by a particion wall 38, creating a working chamber on each side of it, respectively a higher one 39 and a lower one 40. The upper chamber 49 is connected to the plunger valve 34 through a conduit 41 and the lower chamber 40 over a conduit 42, the conduits 41 og 42 are extending through the valve 30. On suppling 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 a ial, 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 valve or the 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 supp¬ lied 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 down¬ wards movement of the pis ton 33. The movement upwards is effected by a direct trust between the two parts, a coll spring 49 being arranged In The movement downw τ ards 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. In order to have cooperation between this flange 51 and the piston 33, the bore 43 has a flange 52 at the upper end, extending radially over the flange 51. At the end of the rod 47 there Is arranged a coil spring 50 to surpress the shock of a force transferred between the two flanges 51 and 52. To keep the slide 45 in certain end positions, it is provided with 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. To let water from the conduit 42 into the cylinder 23, the slide 45 is provided with an annular groove 57 with outlets 58 radially to the bore 48 through the slide. The particlon 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 connecting 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 manu¬ factured 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 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. 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, the conduits 41 and 42 being connected to a lower, respectively an upper operating chamber for such a compound piston. - -

Claims: Claims: 1. Pump for liquids or gases for immersing in a hole or a corresponding opening, with an hydraulic linear motor comprising a double acting operating piston (33) in a cylinder (23), which through a slide valve (34) is supplied w r ith working medium alternatively to the two sides of the operating piston from a supply conduit, the operating piston being connected with a coaxially arranged pump piston, c h a r a c t e r i z e d in that the operating piston (33) comprises a slide w r ith 'a pipe shaped stem (37) with a flange (35,36) at each end, making a piston, said stem being journaled by an annular bearing (38) arranged In the cylinder (23) between the flanges, to make at each side of the annular bearing (38) a chamber (39,40) with connection to the valve (34) . 2. Pump according to claim 1, c h a r a c t e r i¬ z e d in that the operating piston (33) is integrated with the pump piston, the central conduit (43) through the stem (37) of the piston being provided with a kick- back valve (44) . 3. Pump according to claim 1 or 2, c h a r a c ¬ t e r i z e d in that the valve slide (45) is arranged coaxially to the operating piston (33) separated from this. 4. Pump according to claim 3, c h a r a c - t e r i z e d in that the valve slide (45) is arranged in same cylinder (23) as the operating piston (33) , valve conduit being provided In the cylinder wall. 5. Pump according to claim 3 or 4, c h a r a c ¬ t e r i z e d In that the operating piston (33) is mechan- ically connected to the valve slide (45) by an axially extending rod, preferably a pipe (47) , to impress a changing movement to the valve slide at least when the operating piston moved to the end position aw τ ay from the valve (34) . 6. Pump according to claim 5, c h a r a c - t e r I z e d by having the pipe (47) coaxially attached to the valve slide (45) and at the free end being provided with a flange (51) engaged by the operating piston (33) at the end of the movement away from the valve slide, thus imparting the reversing movement through the valve slide. 7. Pump according to claim 5 or 6, c h a r a c ¬ t e r i z e d in that the operating piston (33) and the valve slide (45) are arranged to have the operating piston engaging the valve slide to impart a reversing movement, when the operating piston is moving towards the valve slide. 8. Pump according to claim 6 or 7, c h a r a c - t e r i z e d in that shock absorbing members are incorp¬ orated in the respective connections between the operating piston (33) and the valve slide (45) , preferably in the form of coil springs (49,50). 9. Pump according to one of the claims 3-8, c h a r a c t e r i z e d in that the valve slide (45) is retained in its end position by a biased member (52) . 10. Pump according to one of the claims 1-9, c h a r a c t e r i z e d in that the valve (34) com¬ prises a further annular groove for the outlet of working medium through a further conduit in the casing (22) and a further outlet conduit.

Inventors: NAESS LUDVIG, NAESS, LUDVIG
Applicants: NAESS LUDVIG, NAESS, LUDVIG
Application year: 1983
Main classification: F04B47
IPC codes: F04B9, F04B47, H05B41