EP4015826A1 - Hydraulikpumpe mit integriertem puffertank - Google Patents

Hydraulikpumpe mit integriertem puffertank Download PDF

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Publication number
EP4015826A1
EP4015826A1 EP21215686.3A EP21215686A EP4015826A1 EP 4015826 A1 EP4015826 A1 EP 4015826A1 EP 21215686 A EP21215686 A EP 21215686A EP 4015826 A1 EP4015826 A1 EP 4015826A1
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EP
European Patent Office
Prior art keywords
liquid
pressure
pump
elastic
storage
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Granted
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EP21215686.3A
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English (en)
French (fr)
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EP4015826B1 (de
Inventor
Luca FANTOZZI
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Trevitech Srl
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Trevitech Srl
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Publication of EP4015826A1 publication Critical patent/EP4015826A1/de
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/16—Pumping installations or systems with storage reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps

Definitions

  • the present invention relates to the field of hydraulic pumps and, more in particular, relates to a hydraulic pump with an integrated buffer tank.
  • Pressure tank hydraulic pumps i.e., systems for increasing the pressure of drinking water with respect to the distribution network (or to a storage tank), allowing the delivery of water to consumers at greater heights or far away, have been known for many years now.
  • a pressure tank system comprises a hydraulic pump, generally a centrifugal pump and, at the discharge thereof, a water buffer tank.
  • a pressure switch is also associated with the pump to control its operation or to shut it down at given discharge water pressures, i.e., the pressure downstream of the pump, towards the consumers.
  • the tank is none other than a pressure tank divided into two parts by a membrane; in the lower part of the pressure tank water is present at the discharge pressure of the pump, while in the upper part air is present at a given pressure, which acts as elastic spring for the discharge water.
  • the pump With the system at the operating pressure, in the case of small pressure drops detected by the pressure switch (for example due to small leaks in the system or very brief use by a consumer) below a threshold value, the pump is operated to restore the discharge (or system) pressure to a pre-set optimal value (in practice the operating pressure of the system), upon reaching which the pump is deactivated again. This makes it possible to prevent continuous "start-stop" of the pump for small pressure drops between the pre-set optimal value and the threshold value of the pressure at the discharge of the pump.
  • the membrane of the tank When the pump is operating in order to restore the pressure in the system (the consumers are closed), the membrane of the tank is deformed, allowing expansion of the volume of the lower part of the pressure tank, filling it with water at the discharge pressure. When there is a small pressure drop, the air acts as a spring, deforming the membrane in the opposite direction, i.e., contracting the volume occupied by the water.
  • a problem linked to pumps with buffer tank of known type comprises the fact that it is necessary to calibrate the air chamber of the tank to allow the correct operating range of the pump for each specific use.
  • Fig. 1 shows a graph of the head of the pump according to flow rate, relating to the characteristic curve n of a pressure tank pump on which the buffer tank is mounted.
  • the buffer tank of the pressure tank must operate, for example, in a pressure range between PI equal to 3.5 bar (a head of approximately 35 metres) and P2 equal to 5.2 bar (a head of approximately 52 metres), where PI is the pressure value below which the pressure switch of the pump activates rotation of the impeller of the pump and P2 is the operating pressure value of the buffer tank, upon reaching which the pump stops pumping.
  • the installer must calibrate the amount of air of the tank between the membrane and the pressure tank, so that it can operate within this range.
  • the pump can also operate for head ranges differing from the one indicated.
  • the installer must regulate the amount of air in the tank to obtain the required resistance of the membrane inside the pressure tank. This regulation inevitably prolongs installation of the pump.
  • pressure tanks are oversized to be able to withstand water hammer that can occur in the system.
  • the aim of the present invention is therefore to provide a hydraulic pump with an integrated buffer tank that can solve the problems related to the installation and use of the pump in systems to increase the pressure of the drinking water with respect to the distribution network or to a pressure tank.
  • an important object of the present invention is to produce a hydraulic pump with an integrated buffer tank that can be easily installed in a system to increase the pressure of the drinking water.
  • Another important object of the present invention is to produce a hydraulic pump with an integrated buffer tank that makes regulation of the buffer tank during installation unnecessary.
  • Another important object of the present invention is to produce a hydraulic pump with an integrated buffer tank that makes it possible to limit maintenance of the pump.
  • Another important object of the present invention is to produce a hydraulic pump with an integrated buffer tank that is particularly compact.
  • the invention relates to a hydraulic pump with an integrated buffer tank, comprising a path for the liquid from at least one suction inlet of the liquid in the pump to a discharge outlet of the liquid from the pump and, along said path,
  • the elastic opposing system comprises a plurality of elastic opposing devices associated with said storage chambers to oppose the expansion of the storage volumes of the storage chambers.
  • the pump is provided with at least one first elastic opposing device for at least one first storage chamber and at least one second elastic opposing device for at least one second storage chamber; preferably a respective elastic opposing device being provided for each storage chamber.
  • a first volume variation of at least one respective first storage chamber is associated with said at least one first elastic opposing device
  • a second volume variation of said at least one respective second storage chamber is associated with said at least one second elastic opposing device
  • said first and second volume variation are different from each other, i.e., said at least one first elastic opposing device and said at least one second elastic opposing device are configured to allow different expansion volumes for said at least one first and at least one second storage chamber;
  • said elastic opposing devices are configured to allow different expansion volumes in all the storage chambers.
  • At least two of said elastic opposing devices have different elastic stiffness to one another.
  • the storage chambers all have the same minimum volume and maximum volume occupiable by the liquid.
  • At least one said elastic opposing device comprises
  • the moving element is integral with, or forms, a portion of a wall of a said storage chamber, and the movement of at least part of said moving element allows expansion of the volume of the storage chamber; preferably, the direction of movement of said at least part of said moving element is orthogonal to the rotation axis of at least one impeller that forms the pressure section of the pump.
  • the elastic opposing body is arranged outside said storage chamber, between said moving element and an abutment stop, and is configured to be compressed in the direction from said moving element to said abutment stop.
  • At least two of said storage chambers and preferably all of said storage chambers, have a first part of chamber with fixed volume and a second part of chamber with variable volume defined by the movement of said moving element, wherein the fixed volume of said first part of chamber is the same for at least two of said storage chambers, and wherein elastic opposing bodies with different stiffnesses are associated with said at least two storage chambers to allow different expansions of said chambers, so that, the pressure of the liquid in the at least two said storage chambers being equal, said chambers have different volumes.
  • the moving element comprises a membrane constrained, in a fluid-tight manner, to said first part of chamber; preferably, a slider adapted to interact with said elastic opposing body is fixed to said membrane, to allow movement by the membrane in order to vary the volume of the chamber.
  • the pump comprises an electronic control device, operatively connected to which are an electric drive motor of the pressure member of the pressure section of the pump and a pressure measuring device, preferably a pressure switch, adapted to measure the pressure in the area between the discharge section and the discharge outlet of the liquid, so that said electric motor is adapted to operate said pressure member upon reaching a first pressure value measured by said pressure measurement device, and is adapted to interrupt the operation of said pressure member upon reaching a second pressure value measured by said pressure measurement device, greater than said first value.
  • a pressure measuring device preferably a pressure switch
  • the pump comprises an outer casing inside which said path for the liquid is defined, said casing being provided with
  • At least two of said storage chambers are arranged respectively on opposite sides of a plane on which the rotation axis of said at least one impeller of the pump lies.
  • the invention relates to a hydraulic pump comprising at least one UV lamp arranged along said path for the liquid, configured to irradiate the fluid flowing along the path.
  • the UV lamp is arranged downstream of said pressure section and upstream of said discharge outlet for the liquid.
  • the UV lamp is contained in a bay provided along said path for the liquid.
  • the UV lamp is contained in the bay for the liquid at the discharge pressure of the pump configured on a side wall of the compartment with the at least one impeller, so as to extend more or less following the extension of the rotation axis of the impeller; preferably, the UV lamp extends more or less parallel to the rotation axis of the impeller.
  • the UV lamp is contained inside a sealed bulb that allows the passage of UV radiation from the lamp to the liquid flowing around the bulb; preferably, the lamp has a prevalently longitudinal extension and is provided, at the ends, with cables at least partly provided inside the sealed bulb and adapted to be operatively connected with an electronic device for managing the pump.
  • the sealed bulb containing the UV lamp is provided inside a container provided with at least one entry for the liquid coming from the pressure section and with at least one discharge of liquid toward an area at the same pressure as the outlet of the pump.
  • the container is arranged in a housing provided in said bay.
  • the pump comprises
  • each manifold defines a direction of entry of the liquid of the pump that lies on a plane on which the rotation axis of at least one impeller forming the pressure section of the pump is incident, preferably orthogonally.
  • each manifold has an entry inlet for the liquid defining an inlet axis orthogonal to the rotation axis of at least one impeller forming the pressure section of the pump, and wherein, preferably, the two respective entry inlets of the two manifolds integral with the casing of the pump are substantially aligned, i.e. their inlet axes are coaxial.
  • the manifolds are provided on a cover of said casing, positioned at one end of said pump, on the opposite side with respect to a drive motor of the pump with respect to the pressure section.
  • the pump is configured to be arranged inside a system formed by a plurality of similar pumps provided with said inlet manifolds and arranged in series side by side, with said manifolds connected to one another so that a first manifold of a pump is connected to one of the two manifolds of a pump that precedes it in the series, and a second manifold is connected to one of the two manifolds of a pump that follows it in the series, and wherein the first pump of the series has a manifold connected to the network or the pressure tank from which the liquid to be drawn comes, and a last pump of the series comprises one of the two manifolds capped or a single manifold for a single inlet.
  • the pump comprises, inside said casing, an electric drive motor of the pressure section.
  • the pump comprises a pressure measuring device in said discharge, contained in said casing; preferably, said pressure measuring device is a pressure switch; said pressure measuring device is functionally associated with a drive motor of the pressure section.
  • the pump comprises an electronic control device, operatively connected to which are said electric drive motor of the pressure section and said pressure measuring device.
  • the invention relates to, regardless of the buffer tank, a hydraulic pump, comprising a path for the liquid from at least one suction inlet of the liquid in the pump to a discharge outlet of the liquid from the pump and, along said path, downstream of said inlet, a pressure section configured to increase the pressure of the liquid, characterized in that it comprises a UV lamp arranged along said path for the liquid, configured to irradiate the fluid flowing along said path.
  • the invention relates to, regardless of the buffer tank, a hydraulic pump comprising an outer casing inside which a path for the liquid is defined from suction inlet section of the liquid in the pump to a discharge outlet of the liquid from the pump and, along said path, downstream of said inlet section, a pressure section configured to increase the pressure of the liquid, characterized in that said suction inlet section of the liquid comprises two distinct inlets for the liquid into the inlet section, and wherein said two inlets are provided on respective inlet manifolds which are integral with said casing, each manifold being provided with means that aid the hydraulic connection to a similar manifold of a similar pump, so that the inlets of the pumps connected to one another by means of said manifolds, have the inlets all at the same suction pressure.
  • a hydraulic pump according to the invention is indicated as a whole with the number 10.
  • This pump 10 comprises an outer casing 11 on which the suction inlet 12 of the liquid in the pump and the discharge outlet 13 of the liquid from the pump are defined.
  • a path P for the liquid that leads from the suction inlet 12 to the discharge outlet 13 (schematized by dashed lines in Fig. 2 ) is provided inside the casing 11.
  • a pressure section 14 is provided along the path P, inside the casing, downstream of the suction inlet 12, configured to increase the pressure of the liquid. Therefore, the pump comprises, in succession, a suction section, in which the inlet 12, is provided, the pressure section 14, and the discharge section in which the outlet 13 is provided.
  • the pump is a multistage centrifugal pump (in other examples the pump can be single stage or not be of centrifugal type) and therefore the pressure section 14 has a plurality of impellers, indicated as a whole with 15, fitted onto a shaft with rotation axis X.
  • the casing 11 comprises a first compartment 16. in which the impellers 15 are arranged, and a second compartment 17, in succession with respect to the first compartment 16 along the axis X, in which an electric motor 18 to rotate the impellers 15 is provided.
  • a basement 11.1 for the pump is provided on an outer side wall of the casing 11, so that it preferably operates with the rotation axis X parallel (or almost parallel) to the surface on which the basement of the pump rests.
  • the pump can also operate arranged on a supporting surface so that its axis X is orthogonal, or almost orthogonal, to this surface, being able to operate in practice positioned in any way in the space.
  • a bay 19 is provided along the path P, downstream of the pressure section 14 (and naturally upstream of the discharge outlet 13), in which the liquid is substantially at the same pressure as the outlet 13, i.e., the discharge pressure.
  • this bay 19 is provided on a side wall of the first compartment 16 opposite the side wall of the same first compartment on which the basement 11.1 is provided, so that the bay 19 is arranged above the first compartment 16.
  • this bay 19 has, for example, a greater longitudinal extension such as to follow the extension of the rotation axis X of the impellers.
  • the bay 19 can be replaced by one or more channels, all at the same discharge pressure as the outlet 13.
  • a buffer tank of pressurized liquid is also provided along the path P, downstream of the pressure section 14, which has an elastically variable storage volume and an elastic opposing system of the expansion of the storage volume when the pressure in the tank increases.
  • this buffer tank is formed by a plurality of liquid storage chambers (in this example, four chambers) distinct from one another, in this example four identical chambers, respectively a first storage chamber 20 I , a second storage chamber 20 II , a third storage chamber 20 III and a fourth storage chamber 20 IV .
  • Each of these chambers is at least partly elastically expansible and subject to the opposing system which opposes their expansion, described below.
  • These storage chambers 20 (hereinafter, for simplicity, reference will be made to the number 20 I - 20 IV only when referring precisely to a specific storage chamber, using the number 20 for all other cases), forming the buffer tank, are all set at same liquid discharge pressure, for example by means of respective entry channels 21 flowing directly into the bay 19.
  • Each chamber 20 is, for example, provided on a same side wall of the bay 19, on the opposite side with respect to the first compartment 16 with the impellers 15.
  • the chambers 20 are arranged in pairs on opposite sides of a plane (for example vertical, in the figures) on which the rotation axis X of the impellers of the pump lies, in practice being distributed in a compact array.
  • the pump 10 also comprises an electronic control device 40 (for example located inside a box-shaped body 40A), operatively connected to which are the electric drive motor 18 of the impellers 15, and a pressure measuring device 41, preferably a pressure switch, adapted to measure the pressure in the area between the discharge outlet 13 and the outlet of the pressure section, i.e., adapted to measure the pressure in the discharge section of the pump downstream of the impellers (or the pressure measuring device can be arranged downstream of the outlet 13 defined on the casing), so that the electric motor 18 is adapted to rotate the impellers upon reaching a first pressure value measured by the pressure switch 41, and is adapted to interrupt the operation of the impellers upon reaching a second pressure value again measured by the pressure switch, greater than the first value, as better explained below.
  • the pressure switch 41 is positioned inside the box-shaped body 40A, and is in communication with the bay (with the interposition of suitable gaskets) by means of a hole 41A schematized in the figures only by a dashed line.
  • each of these (see in particular Fig. 3 ) comprises a first part of chamber 20.1, with a fixed volume, obtained for example on a base fixed to the side wall of the bay 19, to form a bowl portion 22, open at the top in the figures.
  • the part of chamber between the first part 20.1 and the membrane defines a second part 20.2 of the storage chamber 20, of variable volume type, on the base of the position of the membrane 23 with respect to the bowl portion 22.
  • an elastic opposing system of the expansion is associated with the buffer tank formed by the storage chambers 20.
  • this elastic opposing system comprises a plurality of elastic opposing devices associated with the storage chambers 20, to oppose the expansion of the storage volumes defined in the chambers.
  • an elastic opposing device 30 is provided for each chamber (in other examples opposing devices that interact with more than one chamber at a time can be provided).
  • a first elastic opposing device 30 I a first elastic opposing device 30 I , a second elastic opposing device 30 II , a third elastic opposing device and a fourth elastic opposing device (the latter are not explicitly shown in the figures, being identical to the former), are provided (in respective chambers 20 I - 20 IV ).
  • a first elastic opposing device 30 I a second elastic opposing device 30 II , a third elastic opposing device and a fourth elastic opposing device (the latter are not explicitly shown in the figures, being identical to the former), are provided (in respective chambers 20 I - 20 IV ).
  • Each elastic opposing device 30 is independent and autonomous with respect to the other elastic opposing devices, i.e., is capable of opposing the expansion of the volume only of the chamber with which it is associated (or of the chambers with which it is associated).
  • Each elastic opposing device 30 comprises a moving element 31 adapted to move from a first position corresponding to a minimum volume occupiable by the liquid in the chamber (shown with a dashed line in Figs. 2 and 3 ), to a second position corresponding to a maximum volume occupiable by the liquid in the chamber.
  • This moving element has a fixing assembly 31.1 to the membrane 22 and a rod 31.2 integral with the fixing assembly 31.1 (rod and fixing assembly are not indicated with a dashed line, for graphical clarity), adapted to translate along a direction of movement, so that the movement of the rod 31.2 causes the movement of the fixing assembly 31.1 and consequently of the portion of membrane in the direction of movement, thereby allowing variation of the volume of the storage chamber 20.
  • the direction of movement of the rod 31.2 is orthogonal to the rotation axis X of the impellers that forms the pressure section 14 of the pump.
  • the elastic opposing device 30 is substantially contained inside a dome 32, fixed above the first part of chamber 20.1 (with the fixed volume).
  • the guide for translation of the rod 31.2 is provided in this dome.
  • the fixing assembly 31.1 comprises, for example, two discs fixed on the rod 31.2 which basement a portion 22.1 of membrane 22 in the manner of a sandwich.
  • a first disc is provided inside the chamber 20, while the second disc is provided outside the chamber.
  • each elastic opposing device 30 comprises an elastic opposing body adapted to generate an elastic opposition to the movement of the rod 31.1, i.e., of the fixing assembly 31.2, or of the membrane 23 from the first position to the second position.
  • an elastic opposing body is provided for each elastic opposing device 30 and therefore, in this example, four elastic opposing bodies are provided, i.e., a first elastic opposing body 33 I , a secondo elastic opposing body 33 II , a third elastic opposing body and a fourth elastic opposing body 33 (the last two not shown, being identical to the others), hereinafter, for simplicity, reference will be made to the number 33 I - 33 II only when referring precisely to a specific elastic opposing body, using the number 33 for all other cases.
  • the elastic opposing body 33 is, for example, an elastic spring, for example a coil spring placed around the rod 31.1.
  • This elastic spring is arranged between the secondo disc of the fixing assembly 31.1 and an abutment stop 32.1 defined on the dome 32.
  • This spring 33 is configured to be compressed in the direction of movement orthogonal to the axis X, with the direction from the membrane 22 to the abutment stop 32.1.
  • the elastic opposing body can also be formed by elements other than coil springs, for example be formed by elastic elements of different shape, or also by elastomeric elements, or by gas springs, etc.
  • the term “elastic” is meant as a component that, if stressed in one direction, tends to become deformed and when no longer stressed, the component returns to the initial configuration. Therefore, the term elastic can mean purely elastic, quasi-elastic, viscoelastic, nonlinear elastic behaviors, etc.
  • the four elastic opposing bodies / springs 33 all have different elastic stiffnesses.
  • the first elastic opposing body 33 I has an elastic stiffness K1
  • the second elastic opposing body 33 II has an elastic stiffness K2, with K2 > K1
  • the third elastic opposing body has an elastic stiffness K3, with K3 > K2
  • the fourth elastic opposing body has an elastic stiffness K4, with K4 > K3.
  • the storage chambers are substantially the same as one another, and in particular the membranes 23 all have the same surface. Therefore, the increase in the in the storage chambers 20 being equal (they are all always at the same pressure) the expansion of their volume is differentiated based on the stiffness of the springs 33. More in particular, the expansion will be increasing from the fourth storage chamber 20 IV to the first storage chamber 20 I (the greater the stiffness of the spring of the elastic opposing device is, the smaller the movement of the moving element 31 associated with the membrane 22 will be, i.e., the smaller the variation of volume, or the expansion of the chamber, will be).
  • each storage chamber 20 having its own expansion opposing device with its own stiffness, allows the pump to operate in a given range of pressures.
  • the pump comprises buffer tanks (chambers) already calibrated (during assembly, or design, of the pump) and therefore it is sufficient to position the pump in the system without regulating any element of the tank.
  • the first chamber 20 I can, for example, expand to a value Pa, value such that the moving element 31 of the first elastic opposing device 30 I reaches its end of stroke (the membrane expands the chamber to its maximum expansion and the first spring 33 I is compressed by a value W1).
  • the second chamber 20 II can, for example, expand to a value Pb > Pa, value such that the moving element 31 of the second elastic opposing device 30 II reaches its end of stroke (the membrane expands the second chamber to its maximum expansion and the second spring 33 II is compressed by a value Wb ⁇ Wa).
  • the third chamber 20 III can, for example, expand to a value Pc > Pb, value such that the moving element 31 of the third elastic opposing device reaches its end of stroke (the membrane expands the third chamber to its maximum expansion and the third spring is compressed by a value Wc ⁇ Wb).
  • the fourth chamber 20 IV can, for example, expand to a value Pd > Pc, value such that the moving element 31 of the fourth elastic opposing device reaches its end of stroke (the membrane expands the fourth chamber to its maximum expansion and the third spring is compressed by a value Wd ⁇ Wc).
  • the graph of Fig. 5 shows the head/flow rate graph with the operating curve n of the pump.
  • the graph highlights the four operating ranges of the pump Po-Pa-Pb-Pc-Pd (the limits of each range coincide with the lower and upper limits of the operating pressure of the tank in this range) linked to the stiffness of the springs of the four opposing devices 30, i.e. to the different expansion capacities of the four chambers 20.
  • the pump must operate in a pressure range between the ambient pressure P 0 (for example the pump draws water from a pressure tank that is not pressurized) and a head value Pa of around 22 metres (equal to an increase of around 2.2 bar)
  • the pump is operated to pressurize the system and the storage chambers to the pressure Pa.
  • All four chambers are filled with liquid and all expand according to their expansion capacity, i.e., the first storage chamber 20 I expands to a greater extent than the second chamber 20 II , which expands to a greater extent than the third chamber 20 III , which expands to a greater extent than the fourth chamber 20 IV .
  • a pressure drop at the discharge of the pump generates a contraction of the volume in the storage chambers 20. If the pressure drops below the desired threshold, the pump restores the tank to the correct pressure, bringing new water of the storage chambers to the operating pressure Pa of the tank.
  • the pump pumps water into all the chambers 20 to the pressure Pb, upon reaching a first value Pa, the first storage chamber 20 I expands completely. The pressure continues to increase and upon reaching Pb, the second storage chamber 20 II expands completely. The pressure increases again and upon reaching Pc, i.e. the maximum operating pressure, the third storage chamber 20 III expands substantially completely (or also not completely, depending on how the spring is configured). Upon reaching this pressure, the pump stops pumping.
  • the membrane expands its volume by a fraction of its permissible volume, i.e., the fourth spring 33 IV is compressed by a value Wd' ⁇ Wd.
  • the remaining expansibility of the fourth chamber can be used to offset any pressure peaks caused by water hammer (naturally the fourth spring must be sized in terms of stiffness to allow the absorption of these peaks).
  • the pump 10 can be configured with a number of expansion chambers variable from two to a number greater than two, according to structural requirements.
  • the underlying idea of having a number of at least two expansion chambers integrated in the casing allows plant layout and maintenance advantages to be achieved (with the springs it is not necessary to calibrate the buffer tank and it is not necessary to carry out maintenance, and moreover, in the event of failure of an element of an expansion chamber, at least one second expansion chamber is always present to allow operation of the pump).
  • this plurality of expansion chambers integrated in the casing of the pump makes it possible to obtain a particularly compact pump.
  • a variant of pump 10, shown in Fig. 6 further comprises a UV ultraviolet lamp 50 positioned inside the casing of the pump, along the path P of the liquid, configured to irradiate the fluid flowing along said path.
  • this UV lamp 50 is arranged inside the bay 19 and therefore is arranged downstream of the pressure section 14 and upstream of the discharge outlet 13.
  • the UV lamp 50 is of the ultraviolet ray sterilizing type, for example with irradiation greater than 30mj/cm 2 , power supply of 220V - 50Hz and with a lamp life of around 10000 hours.
  • the power is preferably supplied through the electronic device 40, which preferably comprises a counter module of the time of use, in order to notify the user that the lamp requires to be replaced upon reaching a given total time of use.
  • the lamp 50 has a prevalently longitudinal extension X', advantageously parallel to the axis X of the impellers.
  • the lamp can have a different orientation to the one parallel to the axis of the impellers.
  • the UV lamps can be more than one, for example two, for example positioned parallel to one another in the bay 19.
  • the UV lamp 50 is preferably contained inside a sealed bulb 51, for example in quartz glass, provided inside the bay 19, which allows the passage of UV radiation from the lamp to the liquid inside the bay, to allow its sterilization.
  • the ends of the UV lamp 50 are associated with electrical cables 52, advantageously connected with the electronic control device 40.
  • the lamp 50 is fixed with one end to a wall of the bay 19, so that the cables relating to this end extend directly from the inside of the walls of the bay, while the cables relating to the opposite end extend therefrom, naturally inside the bulb 51, toward the wall of the bay to which the lamp is fixed.
  • the casing 11 is provided with a removable cover 11B to be able to easily access the bay 19 to replace the lamp in case of malfunction.
  • This positioning of the UV lamp 50 in the bay 19 allows the pump to act as a multifunction product particularly compact and quick to install inside a water supply system.
  • Fig. 7 shows a further variant of pump 10 with UV lamp.
  • the bulb 51 with the UV lamp 50 inside are provided inside a container 54, provided with an entry 55 directly connected with the outlet of the pressure section 14, and with a discharge hole 56 inside the bay 19, i.e., in an area at the same discharge pressure, so that the liquid sterilized by the lamp 50 passes directly into the bay 19 or in any case into a duct that flows out through the outlet 13.
  • the bay can be structured to form a specific housing for the container 54.
  • FIG. 7 the chambers 20 are not represented.
  • a pump with a UV ultraviolet lamp integrated inside it as just described can be produced without the chambers as described above, as an external buffer tank or having a different structure to the one indicated here can be adapted to the specific case.
  • the pump according to the invention also comprises two distinct inlets 112, defined by entry inlets 112A for the liquid into the suction section, as shown in Figs. 8 to 11 , where a series of portions of pumps connected to one another are visible.
  • Fig. 8 shows a front view of three pumps connected to one another at respective inlets, partly sectioned by a plane along the line IIX-IIX of Fig. 9 .
  • two of the three pumps are pumps 10 and 10' of the type with storage chambers provided in the casings under the domes 32, while a third pump 60 is of conventional type, for example with buffer tank to be positioned outside the pump.
  • Fig. 10 shows the case of a single pump 10 with storage chambers and with the two distinct inlets 112.
  • inlets 112 are provided on respective inlet manifolds 113 which are integral with the casing, and in particular on a cover 11A at one end of the casing 11, fixed to the rest of the casing in in a sealed manner, but optionally removable to be able to access the pressure section 14.
  • Each manifold 113 is provided with means 114 that aid the hydraulic connection to a similar manifold of a similar pump 10, as shown in the figures, so that the inlets 112 of the pumps connected to one another by means of the manifolds 113, have the inlets all at the same suction pressure.
  • the means that aid the hydraulic connection 114 are provided, at the entry inlets 112A, with flanges 114A adapted to mutually abut.
  • Mutual fixing is, for example, obtained with a joining device having a sleeve 130 positioned with seal between the entry inlets 112A, and an elastic joining ring 131 placed around the flanges 114A to basement their axial movement.
  • the means that aid the hydraulic connection can be provided with hydraulic connections, for example of threaded type, known per se, adapted to couple with corresponding threads present on the manifolds 113.
  • Each entry inlet 112A for the liquid defines an inlet axis Y orthogonal to the rotation axis X of the impellers 15.
  • the two respective entry inlets 112A of the two coupled manifolds 113 are substantially aligned, i.e., their inlet axes Y are coaxial.
  • both the entry directions Y lie on a common plane orthogonal to the rotation axis X of the impellers 15.
  • the pump 10 is thus configured to be arranged inside a system, indicated as a whole with 100, formed by a plurality of pumps 10-10'-60 provided with respective inlet manifolds 113 and placed in series side by side, with the manifolds connected to one another so that a first manifold 113 of a pump is connected to one of the two manifolds of a pump that precedes it in the series, and a second manifold is connected to one of the two manifolds of a pump that follows it in the series, and wherein the first pump of the series has a manifold 113' connected with the network or the pressure tank from which the liquid is to be drawn, and a last pump 10' of the series comprises a manifold 113" capped by a cap 170 or, as in the case of Fig.
  • a single manifold 113'" for a single inlet is of the type without storage chambers 20, i.e., they can be pumps with buffer tank positioned outside the pump, downstream of the discharge outlet. It is clear that the use of covers of the casing with double manifolds provided with inlets, can give rise to systems with pumps all of the same type (for example of the type with storage chambers 20), or with pumps different to one another, or even pumps the same as each other but without storage chambers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP21215686.3A 2020-12-18 2021-12-17 Hydraulikpumpe mit integriertem puffertank Active EP4015826B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000031490A IT202000031490A1 (it) 2020-12-18 2020-12-18 Pompa idraulica con polmone di accumulo integrato

Publications (2)

Publication Number Publication Date
EP4015826A1 true EP4015826A1 (de) 2022-06-22
EP4015826B1 EP4015826B1 (de) 2023-08-30

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EP21215686.3A Active EP4015826B1 (de) 2020-12-18 2021-12-17 Hydraulikpumpe mit integriertem puffertank

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Country Link
EP (1) EP4015826B1 (de)
DK (1) DK4015826T3 (de)
ES (1) ES2965195T3 (de)
IT (1) IT202000031490A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918737A1 (de) * 2014-03-13 2015-09-16 Varem S.p.A. Ausdehnungsgefäß, insbesondere für Sanitäranlagen mit Wasserpumpeinheit
US20200109792A1 (en) * 2015-10-15 2020-04-09 Grundfos Holding A/S Non-return valve
DE102019001436A1 (de) * 2019-02-28 2020-09-03 Hydac Technology Gmbh Verfahren zum Ermitteln eines Speicherdruckes nebst zugehöriger Vorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2918737A1 (de) * 2014-03-13 2015-09-16 Varem S.p.A. Ausdehnungsgefäß, insbesondere für Sanitäranlagen mit Wasserpumpeinheit
US20200109792A1 (en) * 2015-10-15 2020-04-09 Grundfos Holding A/S Non-return valve
DE102019001436A1 (de) * 2019-02-28 2020-09-03 Hydac Technology Gmbh Verfahren zum Ermitteln eines Speicherdruckes nebst zugehöriger Vorrichtung

Also Published As

Publication number Publication date
IT202000031490A1 (it) 2022-06-18
EP4015826B1 (de) 2023-08-30
ES2965195T3 (es) 2024-04-11
DK4015826T3 (da) 2023-12-11

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