Abstract:
A volumetric hydraulic machine for water supply in pressure comprising a rotating slide valve integral with a crankshaft which rotates around an axis, said rotating slide valve is rotatably mounted on a distribution box that comprises a plurality of cavities respectively connected to a plurality of pipes of which an outlet pipe connected with the output in the water supply, the other remaining pipes of said plurality of pipes each respectively connected with only one of a plurality of chambers of a monoblock which integrally mounts said distribution box, said monoblock comprising a central chamber and at least a pair of further chambers, said crankshaft engaging at least a pair of connecting rods mounting pistons.

Description:
[0001]    The present invention relates to a volumetric hydraulic machine for water supply in pressure. 
       BACKGROUND OF THE INVENTION 
       [0002]    Hydroelectric generators on the market exploit the pressure force of the water pipes to cause the turbines to rotate and generate electric energy. In order for the hydroelectric turbine generator to efficiently generate electric current, there is a need on the one hand to increase the speed of the water flow on the turbine blades or propellers, and on the other, to make the geometry of the turbine blades or propellers as effective as possible. 
         [0003]    The pipes of the aqueduct supplies have water flow pressures which change significantly over time due to weather factors and use by the population or by industries. 
         [0004]    Patent IT2011TV0045A1 describes a volumetric paddle turbine capable of exploiting the excess pressure of the aqueduct supplies to generate electric energy. 
         [0005]    Said turbine is disadvantageously only applied to aqueduct supplies with a high pressure and flow rate. Furthermore, said paddles of said turbine are disadvantageously subject to wear caused by the minerals in the water. 
         [0006]    Said volumetric turbine becomes less effective over time thus disadvantageously being fragile, given that said paddles are pushed by respective compression springs against an inner wall of a fluid containment cylinder to increase the pressure. 
         [0007]    Said turbine is not capable of effectively regulating the excess water flow, given that a sudden strong increase of the water inlet risks breaking the turbine mechanism. 
         [0008]    GB-2178488A describes a hydraulic machine exploiting the kinetic energy of water flowing through aqueduct water network, wherein said hydraulic machine comprises a pair of pistons which are intermittently interrupting the water flow. It is disadvantageous because said hydraulic machine interrupts the water flow of the aqueduct water network and the pistons are in risk of breaking. 
       BRIEF SUMMARY OF THE INVENTION 
       [0009]    The object of the present invention is to make a high-efficiency volumetric hydraulic machine which exploits the excess kinetic energy of the aqueduct supplies in a wide range of pressure and flow rate values without interrupting water supply. 
         [0010]    It is a further object of the present invention to make a volumetric hydraulic machine that is solid and long-lasting over time, thus also resisting sudden large changes of the water flow in the supply. 
         [0011]    In accordance with the invention, these objects are achieved with a volumetric hydraulic machine for water supply in pressure according to claim  1 . 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0012]    These and other features of the present invention will become increasingly apparent from the following detailed description of one of its non-limiting practical embodiment examples disclosed in the accompanying drawings, in which: 
           [0013]      FIG. 1  shows a perspective view of volumetric hydraulic machine; 
           [0014]      FIG. 2  shows a side view of a practical embodiment of the volumetric hydraulic machine coupled with an existing device for generating electric current; 
           [0015]      FIG. 3  shows a sectional axial view of  FIG. 2 ; 
           [0016]      FIG. 4  shows a sectional axial view of a cover; 
           [0017]      FIG. 5  shows a sectional axial view of a rotating slide valve; 
           [0018]      FIG. 6  shows a sectional axial view of a distribution box; 
           [0019]      FIG. 7  shows a front view of the cover; 
           [0020]      FIG. 8  shows a front view of the rotating slide valve; 
           [0021]      FIG. 9  shows a front view of the distribution box; 
           [0022]      FIG. 10  shows a sectional view of the cover according to the line X-X in  FIG. 4 ; 
           [0023]      FIG. 11  shows a sectional view of the rotating slide valve according to the line XI-XI in  FIG. 5 ; 
           [0024]      FIG. 12  shows a sectional view of the distribution box according to the line XII-XII in  FIG. 6 ; 
           [0025]      FIG. 13  shows a front plan view of a rotating slide valve in a first operating step; 
           [0026]      FIG. 14  shows a sectional view according to the line XIV-XIV in  FIG. 13 ; 
           [0027]      FIG. 15  shows a sectional view according to the line XV-XV in  FIG. 14 , where the section is depicted by the oblique broken line; 
           [0028]      FIG. 16  shows a front plan view of a monoblock according to the present invention, in the first operating step; 
           [0029]      FIG. 17  shows a front plan view of the rotating slide valve in a second operating step; 
           [0030]      FIG. 18  shows a sectional view according to the line XVIII-XVIII in  FIG. 17 ; 
           [0031]      FIG. 19  shows a sectional view according to the line XIX-XIX in  FIG. 18 , where the section is depicted by the oblique broken line; 
           [0032]      FIG. 20  shows a front plan view of the monoblock according to the present invention, in the second operating step; 
           [0033]      FIG. 21  shows a front plan view of the rotating slide valve in a third operating step; 
           [0034]      FIG. 22  shows a sectional view according to the line XXII-XXII in  FIG. 21 ; 
           [0035]      FIG. 23  shows a sectional view according to the line XXIII-XXIII in  FIG. 22 , where the section is depicted by the oblique broken line; 
           [0036]      FIG. 24  shows a front plan view of the monoblock according to the present invention, in the third operating step; 
           [0037]      FIG. 25  shows a front plan view of the rotating slide valve in a fourth operating step; 
           [0038]      FIG. 26  shows a sectional view according to the line XXVI-XXVI in  FIG. 25 ; 
           [0039]      FIG. 27  shows a sectional view according to the line XXVII-XXVII in  FIG. 26 , where the section is depicted by the oblique broken line; 
           [0040]      FIG. 28  shows a front plan view of the monoblock according to the present invention, in the fourth operating step; 
           [0041]      FIG. 29  shows a front plan view of the rotating slide valve in a fifth operating step; 
           [0042]      FIG. 30  shows a sectional view according to the line XXX-XXX in  FIG. 29 ; 
           [0043]      FIG. 31  shows a sectional view according to the line XXXI-XXXI in  FIG. 30 , where the section is depicted by the oblique broken line; 
           [0044]      FIG. 32  shows a front plan view of the monoblock according to the present invention, in the fifth operating step; 
           [0045]      FIG. 33  shows a front plan view of the rotating slide valve in a sixth operating step; 
           [0046]      FIG. 34  shows a sectional view according to the line XXXIV-XXXIV in  FIG. 33 ; 
           [0047]      FIG. 35  shows a sectional view according to the line XXXV-XXXV in  FIG. 34 , where the section is depicted by the oblique broken line; 
           [0048]      FIG. 36  shows a front plan view of the monoblock according to the present invention, in the sixth operating step. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0049]    With reference to the above-listed figures, a hydraulic machine  1  for water supply in pressure can be noted comprising a cover  2  of dome-shape which closes on a cylindrical distribution box  3 . 
         [0050]    Said distribution box  3  is mounted in turn on a monoblock  4  comprising a central cylindrical body  40  and two arms: a first arm  41  and a second arm  42  arranged at 120° between them. 
         [0051]    As shown in  FIG. 3 , a rotating slide valve  6 , which is inside cover  2 , is rotatably mounted on said distribution box  3 . 
         [0052]    An inlet flange  21  for the water deriving from an aqueduct water supply (not shown in the figures) opens on the top of the dome of said cover  2 . Said inlet flange  21  is crossed by an axis V which passes the whole hydraulic machine  1  from the front part to the rear part, as shown in particular in  FIGS. 2 and 3 . 
         [0053]    As shown in  FIG. 3 , said cover  2  encloses a front chamber  20  on the distribution box  3 , said front chamber  20  serving advantageously as basin collector for the water entering from said inlet flange  21 . 
         [0054]    As shown in  FIG. 9 , said distribution box  3  comprises three front cavities: a first cavity  30 , a second cavity  31  and a third cavity  32  distributed radially around a through hole  22 , through which axis V passes. A fourth cavity  33  is made inside the distribution box  3 , as shown in  FIG. 12 . 
         [0055]    Four flanges respectively depart from each of said cavities  30 - 33 : a first flange  35 , a second flange  36 , a third flange  37  and a fourth flange  38  in connection with respective four pipes, the first three of which are shown in  FIG. 1 : a first pipe  50 , a second pipe  51  and a third pipe  52  connected with monoblock  4  and a fourth outlet pipe  53  ( FIG. 13 ) which brings the water back to the water supply. 
         [0056]    As shown in  FIG. 9 , the first cavity  30 , the second cavity  31  and the third cavity  32  are arranged at 120° between them, instead the fourth cavity  33  is made inside said distribution box  3  in the section of cylinder between the first cavity  30  and the third cavity  32 . 
         [0057]    Said fourth cavity  33  is bulb-shaped with a first portion  331  of tubular neck-shaped, the first end of which is in connection with the fourth flange  38  and the second end is in connection with a second circular portion  332  in a bulb-bottom shape of the fourth cavity  33 . The centre of said second portion  332  is at the centre in the through hole  22 , as shown in  FIG. 12 . 
         [0058]    Said through hole  22  of the distribution box  3  allows the passage of a crankshaft  7  along the axis V, as shown in  FIG. 3 . 
         [0059]    Said through hole  22  is shaped according to three different radial thicknesses, as shown in  FIG. 6 : a front hole  221  with a greater radius than two other radial thicknesses: a median hole  222  and a rear hole  223 . The front hole  221  is as large as the second portion  332  of the fourth cavity  33  so as to cause the water to flow therein. As shown in  FIG. 3 , the median hole  222  of the through hole  22  encloses a sealing sheath  23  between the through hole  22  and the crankshaft  7  so as not to allow the water to flow between the distribution box  3  and the monoblock  4 . The rear hole  223  encloses bearings  24  to rotate the crankshaft  7 . 
         [0060]    As shown in  FIG. 8 , said rotating slide valve  6  comprises a through opening  61  having the same shape and dimensions as the cavities  30 - 32  of the distribution box  3 , a rear hollow  62  ( FIG. 11 ) and a connecting through hole  63 . 
         [0061]    Said through opening  61  is adapted to select a quantity of water which may flow in a given time range in one only of the respective openings  30 ,  31 ,  32  of the distribution box  3  while the rotating valve  6  rotates around axis V. 
         [0062]    As shown in  FIG. 11 , said rear hollow  62  comprises two portions: a first sectional portion  621  with the same shape and dimensions as the cavities  30 - 32  of the distribution box  3  and a second circular-shaped central portion  622  of the same shape and dimensions as the second portion  332  of the fourth cavity  33  of the distribution box  3 . 
         [0063]    Said connecting through hole  63  allows crankshaft  7  to be mounted integrally with said rotating valve  6 . 
         [0064]    As shown in  FIG. 3 , said distribution box  3  is mounted on the central cylindrical body  40  of monoblock  4 . 
         [0065]    As shown in  FIG. 16 , said central cylindrical body  40  comprises a central chamber  45  connected to a first rear flange  55  in correspondence with the first flange  35  and said first rear flange  55  is connected to the first water pipe  50 . 
         [0066]    Said first arm  41  and said second arm  42  are respectively located in correspondence with the front flanges  36  and  37 . 
         [0067]    Said arms  41  and  42  comprise a first chamber  46  and a second chamber  47 , respectively, which are connected to a second rear flange  56  and to a third rear flange  57 , respectively. The second rear flange  56  is in turn connected to the second cavity  31  with the second pipe  51 , instead the third rear flange  57  is in turn connected to the third cavity  32  of the distribution box  3  with the third pipe  52 . 
         [0068]    As shown in  FIG. 3 , said central cylindrical body  40  has a rear through hole  25  which allows the passage of crankshaft  7  along axis V. 
         [0069]    Said rear through hole  25  is shaped according to two different radial thicknesses, as shown in  FIG. 3 : a first rear hole  251  and a second rear hole  252 . The first rear hole  251  has the same dimensions as crankshaft  7 , instead the second rear hole  252  is adapted to enclose bearings  28  which are adapted to cause said crankshaft  7  to rotate. 
         [0070]    A rear cover  8  of the same dimensions as the central cylindrical body  40  closes the rear part of monoblock  4 . Said rear cover  8  comprises one other rear through hole  26  which is shaped so as to allow the passage of crankshaft  7 . Said other rear through hole  26  is shaped with a recess  261  which is adapted to contain a sealing sheath  29 . 
         [0071]    As shown in  FIG. 16 , said central chamber  45  is separate from the first chamber  46  and from the second chamber  47 . 
         [0072]    Sliding inside the first chamber  46  of the first arm  41  is a first piston  91  which is adapted to move in two forward and backward directions of the direction of the length of the first chamber  46 . Said first piston  91  is connected to crankshaft  7  by means of a connecting rod  93 . 
         [0073]    Sliding inside the second chamber  47  of the second arm  42  is a second piston  92  which is adapted to move in two forward and backward directions of the direction of the length of the second chamber  47 . Said second piston  92  is connected to crankshaft  7  by means of a connecting rod  94 . 
         [0074]    By rotating inside the through holes  22 ,  25  and  26 , said crankshaft  7  is capable of moving the two pistons  91  and  92  forwards and backwards. 
         [0075]    As shown in  FIGS. 2 and 3 , a portion of crankshaft  7  leaves the other rear through hole  26  and is adapted to be separately connected with a mandrel  10  to connect it to a revolution variator  11 , as shown in  FIG. 2 . Said revolution variator  11  may be connected to an electric energy generator  14 , for example, by means of a flywheel  12  and one other mandrel  13 . 
         [0076]    With regards to the operation of the hydraulic machine  1 , we describe the path of the water while the hydraulic machine  1  is already full of water. 
         [0077]    The water is emitted from the water supply into the inlet flange  21 , as shown in  FIG. 1 . The water flows from inside the front chamber  20 , which dome-shape advantageously slows down the speed of the water of the inlet pipe (not shown in the figures) of the water supply, thus contributing to avoiding destructive phenomena associated with overpressures such as for example, the phenomenon of the so-called water hammer. 
         [0078]    The dome-shape of said front chamber  20  advantageously contributes to creating a basin for the water in the short time intervals in which by rotating on axis V, the through opening  61  does not match with any cavity  30 - 32 , thus preventing the passage of the water. 
         [0079]    As the through opening  61  rotates around axis V thus overtime revealing one only of the cavities  30 - 32  at a time in succession, substantially six different operating steps of the hydraulic machine  1  may be apparent. 
         [0080]    Said six operating steps form a cycle of the hydraulic machine  1 . 
         [0081]    In the first operating step of the hydraulic machine I shown in  FIGS. 13-16 , it is apparent that the rotating slide valve  6  has the through opening  61  in correspondence with the third cavity  32  of the distribution box  3 . Said first position of the through opening  61  allows the water inside the front chamber  20  to flow into the third cavity  32  of the distribution box  3 . 
         [0082]    The water flows through the third flange  37  of the distribution box  3  and travels through the third pipe  52  until it flows through the third rear flange  57  of the monoblock  4 , as shown in  FIG. 16 , thus entering the second chamber  47  of the second arm  42  of monoblock  4  and pushing the second piston  92  towards the central chamber  45  of the monoblock  4 . 
         [0083]    The connecting rods  93  and  94  are moved by the action of the second piston  92  thus advantageously causing a rotary motion of crankshaft  7 . At the same time, the motion of the two connecting rods  93  and  94  together with the motion of crankshaft  7  cause a rotary motion of the water in the central chamber  45  thus pushing it through the first rear flange  55  of the monoblock  4  in the first pipe  50  up to the first flange  35  of the distribution box  3 , and to end up in the first cavity  30 , as shown in  FIG. 15 . 
         [0084]    The rear hollow  62  of the rotating slide valve  6  is positioned at the first cavity  30  and the fourth cavity  33  of the distribution box  3 , as shown in  FIG. 15 . 
         [0085]    The water enters the front hole  221  of the through hole  22  of the distribution box  3  by means of the rear hollow  62 , as shown in  FIG. 15 . The water enters the fourth cavity  33  of the distribution box  3  and ends up in the outlet pipe  53  by means of the fourth flange  38 , to be returned advantageously in pressure to the water supply. 
         [0086]    The hydraulic machine  1  indeed uses only a part of the kinetic energy of the water from the water supply, thus allowing the water used to be advantageously re-emitted into the supply to produce electric energy with a partial loss of pressure. 
         [0087]    In the time interval after the description of the first operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding to the second operating step of the hydraulic machine  1 , as shown in  FIGS. 17-20 . 
         [0088]    In said second operating step of the hydraulic machine  1 , it is apparent that the rotating slide valve  6  has the through opening  61  in correspondence with the second cavity  31  of the distribution box  3 . 
         [0089]    Said second position of the through opening  61  allows the water inside the front chamber  20  to flow into the second cavity  31 . 
         [0090]    The water flows through the second flange  36  of the distribution box  3  and travels through the second pipe  51  until it flows through the second rear flange  56  of the monoblock  4  as shown in  FIG. 20 , thus entering the first chamber  46  of the first arm  41  of the monoblock  4 . So the water pushes the first piston  91  towards the central chamber  45  of the monoblock  4 . 
         [0091]    Said first piston  91  pushes the first connecting rod  93  which in turn impresses a force on crankshaft  7  thus contributing to cause it to rotate inside the central chamber  45 . 
         [0092]    As crankshaft  7  rotates, it pushes the second connecting rod  94  which causes the second piston  92  to move towards the third pipe  52 . 
         [0093]    The water in the second chamber  47  of the second arm  42  of the monoblock  4  is then pushed towards the third rear flange  57  of the monoblock  4  thus starting to enter the third pipe  52 . 
         [0094]    At the same time, the motion of the two connecting rods  93  and  94  together with the motion of crankshaft  7  advantageously cause a rotary motion of the water in the central chamber  45  of the monoblock  4  thus pushing it through the first rear flange  55  of the monoblock  4  in the first pipe  50  up to the first flange  35  of the distribution box  3 , and to end up in the first cavity  30 , as shown in  FIG. 19 . 
         [0095]    The rear hollow  62  of the rotating slide valve  6  is positioned at the first cavity  30  and at the fourth cavity  33  of the distribution box  3 , as shown in  FIG. 19 . 
         [0096]    The water enters the front hole  221  of the through hole  22  of the distribution box  3  through the rear hollow  62  of the rotating slide valve  6 , as shown in  FIG. 19 . The water enters the fourth cavity  33  of the distribution box  3  and ends up in the outlet pipe  53  by means of the fourth flange  38 , to be returned advantageously in pressure to the water supply. 
         [0097]    In the time interval after the description of the second operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding to the third operating step of the hydraulic machine  1 , as shown in  FIGS. 21-24 . 
         [0098]    In said third operating step of the hydraulic machine  1 , it is apparent that the rotating slide valve  6  has the through opening  61  in correspondence with the second cavity  31  of the distribution box  3 . 
         [0099]    Said second position of the through opening  61  allows the water inside the front chamber  20  to flow into the second cavity  31  again of the distribution box  3 , as in the second operating step. 
         [0100]    The water flows through the second flange  36  of the distribution box  3  and travels through the second pipe  51  until it flows through the second rear flange  56  of monoblock  4  as shown in  FIG. 24 , thus entering the first chamber  46  of the first arm  41  of monoblock  4  and filling it completely until the first piston  91  completes its travel towards the central chamber  45  of the monoblock  4 . 
         [0101]    Said first piston  91  continues pushing, to the end of its travel, the first connecting rod  93  which in turn impresses a force on crankshaft  7  thus contributing to causing it to rotate inside the central chamber  45 . 
         [0102]    As crankshaft  7  rotates, it continues pushing the second connecting rod which causes the second piston  92  to move towards the third pipe  52 . 
         [0103]    The water in the second chamber  47  of monoblock  4  is then pushed towards the third rear flange  57  of monoblock  4  thus continuing to enter the third pipe  52 . 
         [0104]    The water in said third pipe  52  flows through the third flange  37  of the distribution box  3 , as shown in  FIG. 23 , and flows into the third cavity  32  of the distribution box  3 . 
         [0105]    As shown in  FIG. 23 , the rear hollow  62  of the rotating slide valve  6  is positioned at the third cavity  32  and at the fourth cavity  33  of the distribution box  3 . 
         [0106]    The water enters the front hole  221  of the through hole  22  of the distribution box  3  through the rear hollow  62  of the rotating slide valve  6 , as shown in  FIG. 23 . The water enters the fourth cavity  33  and ends up in the outlet pipe  53  by means of the fourth flange  38  of the distribution box  3 , to be returned advantageously in pressure to the water supply. 
         [0107]    In the time interval after the description of the third operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding to the fourth operating step of the hydraulic machine  1 , as shown in  FIGS. 25-28 . 
         [0108]    In said fourth operating step of the hydraulic machine  1 , it is apparent that the rotating slide valve  6  has the through opening  61  at the first cavity  30  of the distribution box  3 . Said fourth position of the through opening  61  allows the water inside the front chamber  20  to flow into the first cavity  30  of the distribution box  3 . 
         [0109]    The water flows through the first flange  35  of the distribution box  3  and travels through the first pipe  50  of the monoblock  4  until it flows through the first rear flange  55  of monoblock  4 , as shown in  FIG. 28 . 
         [0110]    The water enters the central chamber  40  of monoblock  4  from the first pipe  50  and contributes advantageously to impressing a rotary motion on crankshaft  7  which moves the two connecting rods  93  and  94 , as shown in  FIG. 28 . 
         [0111]    Advantageously, no third piston is installed on said hydraulic machine  1 , given that the rotary motion of the water combined sinergistically with the force of inertia of crankshaft  7 , which was already rotating as described in the preceding first, second and third operating steps, continue pushing the second connecting rod  94 , as though they were carrying out the functions of a third piston. Said second connecting rod  94  in turn pushes the second piston  92  towards the third pipe  52  as in the third operating step of the hydraulic machine  1 . 
         [0112]    The water in the second chamber  47  of the second arm  42  of the monoblock  4  continues to flow towards the third pipe  52 . 
         [0113]    At the same time, the rotary motion of the water combined sinergistically with the force of inertia of crankshaft  7 , which up to said third operating step of the hydraulic machine  1  were dragging the first connecting rod  93 , begin pushing the first connecting rod  93 , as though they were carrying out the functions of a third piston, so as to invert the motion of the first piston  91  towards the second pipe  51 , which said first piston  91  arrived at the stop during the third operating step of the hydraulic machine  1 . 
         [0114]    Said first piston  91  starts pushing the water which filled the first chamber  46  of the monoblock  4 , towards the second pipe  51 . 
         [0115]    The water in the first chamber  46  is then pushed towards the second rear flange  56  of the monoblock  4  thus continuing to enter the second pipe  51 . 
         [0116]    The water in said second pipe  51  flows through the second flange  36  of the distribution box  3 , as shown in  FIG. 27 , and flows into the second cavity  31  of the distribution box  3 . 
         [0117]    As shown in  FIG. 27 , the rear hollow  62  of the rotating slide valve  6  is positioned in correspondence with the second cavity  31  and at the fourth cavity  33  of the distribution box  3 . 
         [0118]    The water enters the front hole  221  of the through hole  22  through the rear hollow  62  of the rotating slide valve  6 , as shown in  FIG. 27 . The water enters the fourth cavity  33  of the distribution box  3  and ends up in the outlet pipe  53  by means of the fourth flange  38  of the distribution box  3 , to be returned advantageously in pressure to the water supply. 
         [0119]    In the time interval after the description of the fourth operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding to the fifth operating step of the hydraulic machine  1 , as shown in  FIGS. 29-32 . 
         [0120]    In said fifth operating step of the hydraulic machine  1 , it is apparent that the rotating slide valve  6  has the through opening  61  in correspondence with the first cavity  30  of the distribution box  3 , similarly to said fourth operating step. 
         [0121]    Said fifth position of the through opening  61  allows the water inside the front chamber  20  to flow into the first cavity  30  again, as in said fourth operating step. 
         [0122]    The water flows through the first flange  35  of the distribution box  3  and travels through the first pipe  50  until it flows through the first rear flange  55  of the monoblock  4 , as shown in  FIG. 32 , thus entering the central chamber  40  of the monoblock  4 . 
         [0123]    Similarly to the fourth operating step of the hydraulic machine  1 , the water continues entering the central chamber  40  of the monoblock  4  from the first pipe  50 , thus contributing advantageously to impress a rotary motion on crankshaft  7  which moves the two connecting rods  93  and  94 , as shown in  FIG. 32 . 
         [0124]    The rotary motion of the water combined sinergistically with the force of inertia of crankshaft  7 , which was already rotating as described in the preceding first, second, third and fourth operating steps, continues to push the second connecting rod  94 , which in turn pushes the second piston  92  towards the third pipe  52  up to stop. 
         [0125]    The water flows completely from the second chamber  47  of the second arm  42  of the monoblock  4  towards the third pipe  52 . 
         [0126]    At the same time, the rotary motion of the water combined sinergistically with the force of inertia of crankshaft  7  continues to push the first connecting rod  93 , as in the fourth operating step of the hydraulic machine  1 . Said first connecting rod  93  continues pushing the first piston  91  towards the second pipe  51  thus pushing the water therein, through the second rear flange  56  of the monoblock  4 . 
         [0127]    The water in said second pipe  51  flows through the second flange  36  of the distribution box  3 , as shown in  FIG. 31 , and flows into the second cavity  31  of the distribution box  3 . 
         [0128]    As shown in  FIG. 31 , the rear hollow  62  of the rotating slide valve  6  is positioned in correspondence with the second cavity  31  and in correspondence with the fourth cavity  33  of the distribution box  3 . 
         [0129]    The water enters the front hole  221  of the through hole  22  of the distribution box  3 , through the rear hollow  62  of the rotating slide valve  6 . as shown in  FIG. 31 . The water enters the fourth cavity  33  of the distribution box  3  and ends up in the outlet pipe  53  by means of the fourth flange  38 , to be returned advantageously in pressure to the water supply. 
         [0130]    In the time interval after the description of the fifth operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding to the sixth operating step of the hydraulic machine  1 , as shown in  FIGS. 33-36 . 
         [0131]    In said sixth operating step of the hydraulic machine  1 , it is apparent that the rotating slide valve  6  has the through opening  61  in correspondence with the third cavity  32  of the distribution box  3 , as in said first operating step of the hydraulic machine  1 . 
         [0132]    Said sixth position of the through opening  61  allows the water inside the front chamber  20  to flow again into the third cavity  32  of the distribution box  3 . 
         [0133]    The water flows through the third flange  37  of the distribution box  3  and travels through the third pipe  52  until it flows through the third rear flange  57  of the monoblock  4 , as shown in  FIG. 36 , thus entering the second chamber  47  and pushing the second piston  92  towards the central chamber  45  of the monoblock  4 . 
         [0134]    Said second piston  92  pushes the second connecting rod  94  which in turn impresses a force on crankshaft  7  thus contributing to cause it to rotate inside the central chamber  45 . 
         [0135]    As crankshaft  7  rotates, it pushes the first connecting rod  93  which continues causing the first piston  91  to move towards the second pipe  51 , as in said preceding fifth operating step of the hydraulic machine. 
         [0136]    The water in the first chamber  46  of the first arm  41  of monoblock  4  is then pushed towards the second rear flange  56  of monoblock  4  thus entering the second pipe  51 . 
         [0137]    At the same time, the motion of the two connecting rods  93  and  94  together with the motion of crankshaft  7  advantageously sinergistically cause a rotary motion of the water in the central chamber  45  thus pushing it to remain in the first pipe  50 , as shown in  FIG. 36 . 
         [0138]    As shown in  FIG. 35 , the rear hollow  62  is positioned at the second cavity  31  of the distribution box  3 , from which the water is entering from the second pipe  51 , and with the fourth cavity  33  of the distribution box  3 . 
         [0139]    The water enters in the front hole  221  of the through hole  22  of the distribution box  3  by means of the rear hollow  62  of the rotating slide valve  6 , as shown in  FIG. 19 . The water enters the fourth cavity  33  and ends up in the outlet pipe  53  by means of the fourth flange  38  of the distribution box  3 , to be returned advantageously in pressure to the water supply. 
         [0140]    In the time interval after the description of the sixth operating step of the hydraulic machine  1 , the rotating slide valve  6  is rotated around axis V due to the action of crankshaft  7 , thus proceeding again to the first operating step already described above and advantageously resuming the cycle of said hydraulic machine  1 . 
         [0141]    The dimensions of the front chamber  20 , of the cavities  30 - 33 , of the rear hollow  62 , of the chambers  45 - 47  and of the pipes  50 - 52  are calibrated to cause the hydraulic machine  1  to operate in synchrony and obtain the rotation of crankshaft  7  in order to convert the kinetic energy of the water in pressure of the water supply into mechanical energy which is useful for rotating mandrel  10  rotatably connected with the revolution variator  11 , as shown in  FIG. 2 , and for rotating the other mandrel  13  to transmit the motion to the electric energy generator  14 . 
         [0142]    Said revolution variator  11  advantageously allows the efficiency of the hydraulic machine  1  to be further increased according to the flow rate and pressure of the water supply. 
         [0143]    Alternatively, mechanical energy may be extracted instead of electric energy, thus replacing the electric energy generator  14  with another device for performing mechanical operations. 
         [0144]    A further alternative allows the hydraulic machine I to be connected directly to an electric energy generator  14  or to another device adapted to perform mechanical operations. 
         [0145]    A further alternative again consists of increasing the dimensions of the hydraulic machine  1  thus increasing the number of pairs of pistons  91 - 92  in monoblock  4 . According to said alternative, in order to operate synchronously, the hydraulic machine  1  also increases, according to the number of pairs of pistons  91 - 92 : the number of cavities  30 - 33  of the distribution box  3 ; the number of pipes  50 - 52  between the distribution box  3  and the monoblock  4  and the number of openings  61  and of the rear hollows  62  of the rotating slide valve  6 . Again in said alternative, a cover  2  with a larger front chamber  20  may be envisaged. 
         [0146]    Advantageously, the hydraulic machine  1  according to the present invention exploits a part of the kinetic energy of the water in pressure flowing in the water supply thus allowing electric energy to be generated efficiently. 
         [0147]    One other advantage consists of the fact that once the water has passed inside the hydraulic machine  1 , it undergoes moderate and controllable pressure losses, and may therefore be re-emitted into the water supply. 
         [0148]    One other advantage again of the present invention is the fact that said hydraulic machine  1  allows electric energy to be produced within a wide range of pressure and flow rate values of the water supply, thus advantageously allowing said hydraulic machine  1  to also be used in the presence of water flows with relatively low flow rate or pressure. 
         [0149]    A further advantage consists of the fact that the hydraulic machine  1  may also be used to regulate the pressure of the water supply by using the excess power to generate electric energy. Said hydraulic machine  1  may therefore replace dissipation tanks already present on the water supply. 
         [0150]    A further advantage again consists of the fact that said hydraulic machine  1  may also operate in the presence of significant or sudden overpressures due to the dome-shape of the front chamber  20  of cover  2 . 
         [0151]    An advantage again consists of the fact that said hydraulic machine  1  is solid and long-lasting with parts subject to little wear over time. 
         [0152]    A further advantage consists of the fact that said hydraulic machine I operates with the two pistons  91  and  92  alone, given that the rotary motion of the water in the central chamber  45  of the monoblock  4  and the inlet of the water from the first pipe  50  to the central chamber  45 , combined sinergistically with the force of inertia of crankshaft  7  and of the connecting rods  93  and  94 , perform the functions of a third piston. 
         [0153]    Again, a further advantage of the present invention is that the hydraulic machine  1  may operate both in line with the water supply according to axis V, or in vertical with respect to the ground.