OA10274A - Vertical alternative pump - Google Patents

Abstract

Alternating vertical pump characterized in that the piston (8) is formed by a support (81, 82, 83) comprising a downward prolonged hub having reinforcement arms; the hub is transversed by the rod (7, 71, 72) and mounted in one piece in translation with the rod (7, 71, 72) and

Description

1 "Vertical alternative pump"

The present invention relates to a vertical alternative pump for exhaling liquids present in the soil, the pump comprising: - a dewatering tube connecting the output level of the pump to the ply of liquid to be pumped by dipping in thistent, - a bottom valve equipping the lower end of the dewatering tube, allowing liquid to enter the tube but retaining the column of liquid, - a rod carrying one or more pistons, controlled in alternating motion to raise the column of li -quide, 15 - each piston allowing the liquid to pass during its movement of descent into the column and becoming impermeable during its upward movement, - control means connected to the rod and controlling the up and down movement descent inside the tube.

Such a reciprocating pump is already known, in particular described in document OAPI 06 221 of 23 March 1979. Such pumps are intended for pumping liquids present in the soil such as groundwater, oil, etc. 2

The known vertical alternative pumps for pumping water are manually moved. They are composed, according to the depth of the plies, either a rod or a drill string, vertical, carrying one or more flap pistons.

Known pistons generally consist of a cylinder of a certain length provided at its periphery along one of its edges, in particular the upper edges, with a joint sliding in the dewatering tube. This cylinder part is slidably engaged on a body, for example formed of fins and determined at its base by a valve. When the piston cylinder descends on the valve, the piston is sealed. In the opposite case, the liquid can pass through the piston. These two different positions between the cylinder and the valve respectively correspond to the downward movement of the piston in the water column contained in the cylinder of the body of the pump or dewatering tube and to the re-up movement of the liquid column. above the piston. It is also known (FR-88 09 575) a pumping device with multiple pistons in which the piston is constituted by a cylinder whose bottom has a so-called alveolar structure. This cylinder is fitted on the motion control latige back and forth. Above the honeycomb bottom there is provided a hand-held discharge valve resting against the honeycomb structure by a tubular element. This tubular element passes through the ductile interior and bears against an abutment solidarity latige. Below the piston, that is to say the alveolar bottom 30 of the cylinder, there is provided a nut and lock nut to lock the assembly.

The cylinders of known pistons have the disadvantage of rubbing significantly on the inner surface of the dewatering column and friction. 35 increases when the dewatering tube undergoes deformations 3 due to ground movements, because the piston is then forced to follow this deformed path.

The gasket along the upper edge of the cylinder, which is pressed against the inner wall of the dewatering tube or the cylinder itself, increases this friction because of the pressure exerted by the liquid column against the gasket and the cylinder.

Often the pumped liquids are loaded and in the long run particles settle on the seats of the piston flaps. The pistons thus lose their étan-chéité, decreasing the flow of liquid pumped. As a result, it is necessary to replace the pistons frequently, which increases the operating cost of the pump.

The valve being a wear part, it becomes fatigued and may require replacement. In this case, the piston assembly must be dismantled to access the valve, remove the valve to be replaced and install the new valve. For this, you must completely remove the piston rod to be able to thread the new valve. This is a relatively lengthy operation for replacing a very simple part.

In addition, since the valve is placed in the cylinder, when the pump is stopped, the solid particles suspended in the water contained in the piston 25 progressively deposit at the bottom. Since the piston is not perfectly sealed, the water escapes and carries with it the solid particles in suspension which risk depositing them between the edge of the membrane and the inner wall of the piston in the interval necessary to allow 30 to the flapper to lift without rubbing against the piston.

This situation is troublesome for non-submerged pistons; if for some reason the pump is stopped for a period of time, i.e. a few hours or days, the solid particles then block the valve and experience has shown that it is in

In this case it is necessary to take out all the water pistons, to disassemble them and to unblock the membranes thus glued.

This represents an important work and consequently a serious and unavoidable disadvantage since the pump 5 is necessarily stopped from time to time, if not in the case of pumps driven by hand or by an electric motor powered by solar cells without battery capacity pad sufficient for continuous operation. The present invention aims to remedy these drawbacks and proposes to create an alterna-tive pump, simple and reliable construction, allowing to pump efficiently liquids even in very deep layers, with a very regular flow even after prolonged use, and which can easily maintain or replace in a simple manner or prevent the valve of the piston or pistons which are above the level of the water when the pump is stopped, They become clogged with particles possibly suspended in water. For this purpose, the invention relates to a vertical alternative pump corresponding to the type defined above, characterized in that: - the piston is formed of a support, comprising a hub 25 extended downwards and bearing legs of reinforcement, the hub being traversed by the rod and mounted solid in translation of the rod, - a valve coming on the top of the support for closing the piston under the weight of the column of liquid which is above or free the passage of the liquid when the piston goes down into the water column in the breathing tube.

The pistons easily mount / dismount on the rod or at the meeting of the elements constituting a rod train of a pump for a large depth. 5 Ο 10 2/4

The simplicity of manufacture related to the small number of simple parts constituting a piston allows the assembly and especially the installation of pistons by unskilled personnel, under conditions of setting up often rudimentary. It is the same maintenance interventions The piston structure practically avoids any deposition of solid particles and any clogging of the piston or the piston itself in its tube, thanks to the rinsing of the piston. during its operation and at the end of a pumping phase.

The particular shape of the piston has the advantage of delimiting at least the contact with the inner surface of the tube of dewatering. In the simplest case the valve is constituted by a liftable membrane which rests on the sup-port to support the water column, according to an interesting feature for operation.

The valve diaphragm is cut between its outer edge and the orifice for passage of latige so as to be able to engage the membrane on the rod without having to thread it over it.

The split disc-shaped membrane is easily placed over the support, loosening only one of the two nuts holding the support. This operation is done very quickly and it is not necessary to remove the support of the rod, that is to say to perform tedious unscrewing.

The membrane may also consist of several partially overlapping sectors. Such an embodiment offers the advantage of the simplicity of mounting and dismounting, it constitutes a flexible form, allowing the various sectors to lift partially or with respect to one another.

.j // ¾ b 6 • t, Λ

Depending on the conditions of use and operation of the pump, the piston will have dimensions more or less close to the inner section of theexhaust pipe. In order to operate the pump slightly and reduce the power required for its drive, a larger clearance is achieved than if the pump is driven by a motor having power from an electrical network and not from a relatively limited power source. As there is at most only a peripheral linear contact between the piston and the inner surface of the tube, even when the dewatering tube is deformed as a result of the movements of the ground, this does not inconveniently the reciprocating movement of the piston and especially this does not increase the frictional forces between the piston and the inner surface of the tube.

In the case of a pump equipping a water tank at great depth, the membrane-shaped valve would not withstand the water column, so it is constituted in this case of a rigid material and more particular the support comprises legs in the form of triangles rights joined by one of their side to the upper and auxiliary hub united over the entire height of the support for-mer in the upper part of the branches of support and attachment of the valve, - the valve is formed of disc sectors each connected by one of the radial sides to the radial upper part of one leg and the other radial side of the valve rests in shutter position on the radial upper part of the next leg.

This embodiment has the advantage of allowing a particularly efficient pumping of a very high column of water without this being done to the detriment of the suppleness of the descent of the piston or its strength. 7 1 U 2 7 4 Moreover, a liquid film is formed between the wall of the tube and the piston or pistons reducing the friction to practically zero, especially since there is no seal between the piston and the piston. the wall that would scrape this liquid film. The present invention will be described in more detail below with the aid of the accompanying drawings, in which: - Figure 1 is a schematic vertical section of a vertical alternative pump, - Figure 2 is a vertical section schemati - that partial of a piston in the course of descent of its rod, - Figure 3 is a vertical sectional schematic of the piston during the rise of the rod, - Figure 4 is an axial sectional view of the support of the 5 is a top view of the piston support, FIG. 6 is an exploded view of the piston, FIG. 7 is a perspective view of a piston, FIG. Another embodiment of a piston, Fig. 8 is a side view of a support shell according to another embodiment of the invention; Fig. 9 is a two-part diode view; of support in mounting position, - Figure 10 is a partial section onIX, showing the complete support assem 7 is a perspective view of another embodiment and assembly of a piston, this view being limited to the upper part of the support, FIG. partial cut of a piston provided with a skirt.

Figs. 13A-15B show various embodiments of a piston support. at ! ..θ'-> b ί ι, · 1/4 '

FIG. 16 shows a complete piston provided with a support according to one of the preceding embodiments.

According to Figure 1, the vertical alternative pump of the invention consists of a base 1 resting on the ground 2. A vertical fountain 3 is integral with the base 1; it comprises a liquid outlet nozzle 4 which discharges for example into a tank 5. This hollow tube 3 is extended at its lower end by an exhalation tube 6. This tube 6 receives a control rod 7 equipped with one or more pistons 8 which will be described later. The lower end of the dewatering tube 6 is equipped with a foot valve 9.

The rod 7 which can also be a set of rods, that is to say an assembly of rods fixed one after the other, according to the depth of the napping in which it is pumped, is controlled in alterna-tif motion by a mechanism 10 which is represented only very diagrammatically. This mechanism 10 is carried by an easel 11. The mechanism 10 can be driven either manually or by an animal, or by a heat engine or electric motor and in the latter case, it is possible to envisage an independent power supply unit. for example batte-ries charged by solar cells.

The vertical reciprocating movement of the rod 7 and the pistons 8 first ensures the raising of the liquid column resting on the pistons 8 and the pouring of a certain quantity of liquid into the tank 5, then the rod 7 makes lowering the pistons 8 inside the column of liquid contained in the dewatering tube 6 30 and retained by the bottom valve 9. Arrived at the end of the low run, the pistons 8 are raised by the rod 7 and thus sink the column of liquid above each piston. At the same time, the piston above the damper 9 creates a depression below it. This depression draws liquid through the bottom valve 9 into the tube 6. The cycle continues as well.

Figures 2 and 3 show the structure of a first embodiment of a piston 8 first in Figure 2 the descent position of a piston 8 driven by rod 7 and Figure 3, its rise.

In these figures we used the same references as in Figure 1 to designate the same elements.

Figure 2 is a partial axial section of the dewatering tube 6 showing the rod 7 or drill string formed of a rod portion 71 connected to a rod portion 72 via a threaded sleeve 74; the lower end 73 of the rod 71 is threaded beyond what is required to simply screw the sleeve 74 so as to receive the piston 8. This piston 8 fixed between a lower nut 12 and a Upper nut 13 consists of a disk-shaped carrier comprising an outer ring 81 connected by spokes 82 to an upper hub 83 traversed by rod 71 (or its threaded portion 73) and an inner hub 84 also traversed by the rod 71; this inner hub 84 supports the support by legs 85 connected to the ring 81. 25 30 35

Above the support, the piston 8 comprises a valve formed here by a membrane 87, flexible. "

The radial shape of the support, both in the legs 85 and rays 82, allows the passage of the liquid (up) in the direction of the arrows A, B, when the pistondescend in the liquid column in the dewatering tube 6as the indicates arrow C.

This descent of the piston 8 causes the lifting of the membrane 87.

FIG. 3 shows the rebound lift movement 7 (or rod elements 71, 72 in the case of a rod loop) identical to that of FIG. 2, according to an upward movement indicated by the arrow D. W "10

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During this upward movement, the column of liquid presses the valve 87 against the support and in particular the upper part of the support of the piston 8, that is to say the ring 81, the spokes 82 and the hub su- 5 upper 83, sealingly closing the piston 8; It allows you to lift the column of liquid.

It should be noted that, as already indicated, the piston 8 is locked on the rod 7 by the nuts 12, 13 quiretients also the valve 87. During the upward movement, the legs 85 transmit a portion of the forces applied to the outer part of the support to the lower hub 84.

According to these FIGS. 2, 3, the outer ring 81 of the support has a beveled edge or a rounded edge, minimizing the contact between the piston 8 and the inner surface of the dewatering tube 6. This linear contact following a circle and not according to a cylindrical surface can absorb all the deviations or differences in alignment for example curved between the rod 7 and the tube 6 dewatering, minimizing the frictional efforts that oppose the movements back .

In addition, the valve 87 is lifted in a supple manner from the support 81, 82, 83 and allows the liquid to disrupt the support, thus avoiding any deposition of solid particles which would affect the sealing of the piston for the movement. of ascent. Even if suspended particles should be deposited near the gap between the edge of the crown 83 and the inner surface of the dewatering tube 6, during a prolonged stoppage of the pump, at the time of the movement of the firm. of rise or descent, the gluing particles will be eliminated since the movement is transmitteddirectly by the rod or the train of rods 7, 71, 72 to the piston 8. 11 'ί aa

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V 5 - 10 15 20 25 30 35

The section of the dewatering tube 6 and that of the pis-ton 8 is circular without this shape being limited-tive and does not exclude polygonal shape: hexagonal or square, etc.

Figures 4, 5, 6 show in more detail the structure of a piston as described above. FIG. 4 shows in section the support with its outer ring 81, one cut branch 82, the collar of the upper hub 83, one cut leg 85 and the other cut-away, the intermediate rings 86 as well as the glue-ruler of the lower hub. 84. Half of the membrane 87 is also shown cut, the other half is not represented.

FIG. 5, which is a view from above corresponding to FIG. 4, shows half of the membrane 87 and the different parts of the support, and in particular the pins 82, the rings 81, 86 and the upper hub 83, leaving the intervals between them. for the passage of li-quide to pump.

The exploded view of FIG. 6 shows these different parts, namely the diaphragm valve 87, the support and its constituent parts 81, 82, 83, 84, 85, 86.

The piston support is a piece made for example in a single part for example plastic molded. Valve 87 is preferably made of a material such as synthetic rubber or plastic material.

The dimensions of the valve are such that it re-covers the openings of the support and arrives close to the inner surface of the dewatering tube with an interval at least sufficient to leave a film of liquid along the par-roi of the tube. - 7 ·

Although the valve 87 may be a disk-shaped part which fits on the rod 7, depending on the

12 f i · · gure 6 it is advantageously slotted, that is to say thatisisque forming the valve 87 is cut along a line 88.Ce cut line may be the junction line oftwo edges of the disc cut. This cutoff line 888 goes from the outer edge 89 to the hole 90 in the middle of the valve 87 receiving the rod 71 (7).

The edges of the cutoff line 8 may also overlap as indicated by the dot line 91. This line is in fact the edge of a disk portion below the top edge so that both sides of the disk overlap on the angled sector between lines 88 and 91.

This valve embodiment makes it possible to simply replace a worn or damaged valve without having to disassemble the support itself.

Figure 7 is an exploded view of a piston embodiment which differs from the previous pistons by the particular shape of the valve and the defixation mode thereof. All parts identical to those of the previous embodiments bear the same references.

This piston variant is distinguished by the shape of the valve consisting of four sectors 92, 93, 94, 95. The sector 92 is shown spaced apart from the other sectors represented them, in the assembled position. These areas may have the same shapes and sizes and may be covered with fish scales. It is also possible, as shown in the variant of FIG. 7, to place two sections 93 and 95 first in a diametrically opposite position on the support 81-86 and then to place the two sectors 92 and 94 over the sectors 93 and 95 thus achieving a slight overlap represented by the lines in interrupted line. In the case of such a valve, when the piston goes down into the water, the above sectors 92 and 94 are raised before the sectors 93 and 95. 2 7 4 angle greater than 1/4 disc so that it can overlap as indicated.

These areas are also continued by two curved legs or hooks 96, 97 at the orifice. These two tabs 96, 97 leave between them a slot 98.

The tabs 96, 97 and the slit 98 allow each sector, for example the sector 92, to be moved across a radial branch 82 and between the inner ring 83 and the directly adjacent intermediate ring 86.

In the example shown, the first intermediate ring 86 is very close to the upper hub 83, the distance between the tabs 96, these 97. When the valve segments 92-95 are thus placed on the support previously fixed to the rod 7 (not shown), the upper fastening member formed of two halves 99A, 99B, each terminated by lugs, is installed. assembly 100, 101. These two parts 99A, 99B have an inner surface 102, 103 threaded, so that the two parts are joined together constituting the same thread conutinu. These parts are assembled for example by visnon shown as indicated by the in-terraced lines 104. At their base, the parts 99A, 99B are continued by a half-flange 105, 106; these complement each other, when the part is assembled, to form a glue supporting the segments 92-95 against the support of the piston 8 previously put in place on the rod. In fact, after placing segments 92-95, the two parts 99A, 99B of the upper fixation member 99 are assembled on the threaded portion 73 (FIGS. 2 and 3) of the rod 71, 7, and then screws this member 99A, 99B to tighten segments 92-95. i 14

To lock the nut so that it does not unscrew under the effect of vibration, it is possible to tighten the two parts 99A, 99B against each other if there remains between them some play to lock the threads of the surfaces 102, 103 in the thread of the threaded portion 71 and to prevent unscrewing.

According to a variant, not shown, the valve is in the form of a tulip, fixed near the outer edge of outer lace 81; the opening of the valve is then 10 around the rod possibly provided with a lining for-ment a seat for the edge of the valve. In this variant, the edges of the "petals" of the valve on the side of the opening can be joined by a ring engaged on the rod.

According to another variant, the tulip-shaped valve is constituted by a single membrane of tron-conical shape fixed by its outer edge, the inner edge abutting the orifice, possibly provided with a ring, entou-rant the rod; this can also be provided with a piece forming the sealing seat against which the edge of the valve orifice bears.

Figures 8 to 10 show another embodiment of a piston support according to the invention. This support is formed of two parts 200, 201, for example exactly identical, that is to say corresponding to the support of Figure 1, cut by a diametral plane (passing through the axis of the rod ). These two halves will be made from the same mold. These two parts 200, 201 assemble on the rod 7 by a collar type assembly. For this, in the upper zone and in the lower zone of each part 200, 201, tabs complement the parts to form collars.

In more detail, according to FIG. 8, the left portion 200 is composed of an outer ring 81A connected by spokes 82A to a hub 83A or inner ring 35. This is actually for both the crown 81A and ......... 15 of the crown 83A of a half-crown. The same is true of the intermediate half-crowns 86A.

The "right" part 201 has the same elements as the "left" part 200, with the same references in which the suffix A is replaced by the B suffix.

The half-crown 83A is also longer than the thickness of the spokes 82A or the outer ring 81A so that the tabs 108A, 109A are accessible for the assembly of the two parts 200, 201.

The lower hub 84A also corresponds to an extended half-hub, on each side, by lugs 110A, 111A intended to be assembled, still in the manner of a collar, with the homologous lugs 110B, 111B of the lower hub 84B of the other part 201 (Figure 10).

This FIG. 10 also shows the primers of the branches 85A and 85B of the two parts 200, 201.

According to FIG. 9, the two parts 200, 201 are disposed on either side of the rod 7. It is sufficient to assemble them by the lugs of the upper collars (these are also partially concealed by the beams 82A, 82B).

We will also assemble the lower collars. This embodiment of the support offers the double advantage of simpler manufacturing since the mold corresponds to only half the shape of the support. Given the symmetry, we can use the same mold to achieve parts 200, 201. This will also greatly facilitate

interventions on the installed pump since there will be more than unscrewing and releasing the support along the stake 7 or reengage along the axis of the rod 7 from a connection between two rod elements 71. In any place, it will be possible to fix a support by this assembly by

16 necklace. The installation of the valve is just as simple in the case of a valve as in Figure 6. This clapet will be held against the top of the support by a fastener similar to a collar, not shown in the drawings. 5 sins.

The perspective view of FIG. 11 shows the support consisting of two parts 200, 201 similar to the sup-port shown in FIG. 9. In FIG. 11, in a simplification process, the legs 85A have not been represented. - 10 tees.

These legs are preferably located in planes other than the joining plane of the two halves 200,201.

On their underside the two parts 200, 201 com-15 carry, along the junction plane, ribs 112A, 113B on which is engaged a clamp 113, 114. This type of assembly can in some cases be more interesting to meet the upper part of the support, preferably to a screw connection less accessible. On the other hand, at their lower zone at the level of the lower hub, the parts 200, 201 can be connected by a screw connection or also a clamp connection as described here. In this case, the ribs may be parallel to the axis of the sup-port and slide vertically. To prevent the pins from coming off under the effect of vibrations they can be blocked by a small screw.

FIG. 12 shows an alternative embodiment of the support, for example as that of FIG. 4. This support is completed at its periphery, by a skirt 115 leaving a gap 116 sufficient with respect to the wall of the dewatering tube for avoid any friction, while at the same time creating a zone of loss of pressure to slow down the flow of the water during pumping. As is clear from FIG. 12, this skirt 115 is located under the support and not on the valve side 87.

Another embodiment of a piston according to the invention will be described hereinafter with reference to FIGS. 13A-15B, showing different embodiments of the support and the assembly of the piston.

According to FIG. 13A, the support 300 is formed of a tubular hub 384 combining the upper hub and the auxiliary center of the preceding embodiments.

The legs 385 are constituted by triangular-shaped triangular veils, one side of which is fixed to the motor 384 and the other constitutes a radius 382 forming a support surface for the not shown valve.

Although in the different variants of the sup-port having four legs formed by tri-gular sails, the number may be different, for example equal to three or five, although an even number is preferable for manufacturing because of the plane symmetry that he gives ausupport.

The variant of FIG. 13B corresponds to the support form of FIG. 13A except that it is in two symmetrical halves along a plane passing through the axis of the labyrinth. These two halves 301 ', 302' of the support 300 'assemble by their webs schematically provided with connecting ports 386'.

The support variant 400 according to FIG. 14A and its embodiment in two symmetrical portions 400 'of FIG. 14B essentially correspond to FIGS. 13A, 13B except that the radial side of the sails 382 is replaced by a larger surface 482. than the thickness of the voices.

In the case of FIG. 14B, for the surfaces cut by the plane of symmetry, the bearing surfaces 482 'are reduced by half and correspond to the surfaces 482'.

The support variant 500 of FIG. 15A and its embodiment 500 'in two symmetrical parts 30 in FIG. 15B are distinguished from the previous ones by sails 585, 585' of variable thickness from top to bottom. In the upper part the sails 585, 585 'form a relatively large bearing surface and of identical dimension over the entire length. This thickness is reduced downwards.

In the case of the support 500 'in two parts, the sails 585Ά cut by the plane of symmetry have a thickness generally halved.

In the various variants of FIGS. 15B, the description of the common parts with those of FIGS. 13A, 13B has not been repeated.

According to FIG. 16, the piston consists of a support 600 constituted by one of the supports of FIGS. 13A-15B and valves 610 in the form of disc sectors, made of a rigid material. These valve sectors 610 are articulated by one (611) of their straight sides to the bearing surface 682 of each sail 685 while the other right side 612 restelibrement on the bearing surface 682 of the following veil (the 20 reference numbers chosen by the different valve parts are the same).

These portions 610 may pivot about the joint on their side 611 and take for example the raised position, shown in Figure 16, to go down into the liquid (water).

During the lifting movement, the valve parts 610 are folded against the support surfaces 682 of the support.

The raising movement of the parts 610 can be practically to the vertical, without exceeding it so that the thrust of the water, during the lifting of the piston, always folds each valve part on the same side.

The opening direction of the parts 610 is preferably the same for all parts of the same piston. ----------

J ί ·

However, this direction can be reversed from one piston to another to avoid inducing a torque in Figure 7.

The type of piston according to Fig. 16 is of particular interest for going down to great depths to effectively withstand high water column heights. ·> 'V.' ·

Claims (1)

A vertical reciprocating pump for discharging liquids present in the ground, comprising: a dewatering tube connecting the outlet level of the pump to the pool of liquid to be pumped; plunging into this ply, - a bottom valve (9) equipping the lower end of the dewatering tube (6), allowing the liquid to enter the tube but retaining the column of liquid, - a rod (7, 71, 72) carrying one or more pistons (8), reciprocally controlled (C, D) to make the liquid column rise, - each piston (8) allowing the liquid to pass during its downward movement in the column and becoming impervious during its upward movement, - control means (10, 11) connected to the rod (7) andcommanding its upward and downward movement inside the tube (6), pump characterized in that that: - the piston (8) is formed of a support (81, 82, 83), comprising a hub extended downwards and carrying reinforcing jam-bols, the hub being traversed by the rod (7, 71, 72) and mounted integral in translation with the rod 25 (7, 71, 72), - a valve coming on the top of the support (81 82, 83) for closing the piston (8) under the weight of the liquid column above or releasing the liquid passage when the piston (8) descends into the water column in the dewatering tube (6). ). 2) A pump according to claim 1, caractéri-sée in that the valve (87) is a cut diaphragm (88) between its outer edge (89) to the orifice (90) ser-vant to the passage of the rod (7) so as to engage the membrane on the rod without having to put it on it. 3) A pump according to claim 1, characterized in that the support is a spoke wheel-shaped part (82) connected to an upper hub (83) and a hub (84) located below the hub ( 83) of the wheel connected to the ring (81) of the wheel by the legs (85). 4) A pump according to claim 1, caractéri-sée in that the support comprises legs in the form of 10 straight triangles joined by one of their side to the upper hub and auxiliary united over the entire height of the sup-port in order to form at the upper part support branches and fixation of the valve, the valve is formed of disk sectors each connected by one of the radial sides to the radial upper part of one leg and the other radial side of the valve rests in shutter position on the upper radial part of the next leg. 5. Pump according to claim 4, characterized in that the support forms with its legs four radial upper parts each receiving a valve sector thus formed of four sections. 6. Pump according to claim 1, caractéri-sée in that the support is formed in the upper portion 25 of an outer ring (81) connected by radioles aumoyeu superior (83). 7. Pump according to claim 1, caractéri-sée in that the valve (87) is a disk-shaped membrane covering the entire upper surface of the support 30 (81, 82, 83). 8 °) Pump according to claim 1, caractéri-sée in that the support is formed of two parts (200,201), including flat symmetrical, which are assembled on one another by trapping the rod (7). 22 010 2 7 4 9 °) A pump according to claim 8, characterized in that the upper half-hub (83A, 83B) and the lower half-hub (84A, 84B) of each part (200, 201 ) of the support are continued on each side, in the junction plane, by a lug (108A, 109A; 108B, 109B) for the hub halves (83A, 83B) of the upper part and the legs (110A, 111A; 110B, 111B) for the lower hub halves (84A, 84B) for assembly in the manner of a collar. 10 °) Pump according to claim 7, characterized in that the valve (87) is a split disk (cut line 88) to allow its mounting on the rod (7) without requiring its threading. 11 °) A pump according to claim 7, characterized in that the valve is formed of sectors (92-95) which overlap and terminate at the center by despattes (96, 97), curved, intended to come into the intervals between the ring of the hub (83) and an intermediate ring (86), an upper fastener, two parts (99A, 99B) blocking the sectors controlled support. 20