Classifications

• • 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
  • F04D13/02—Units comprising pumps and their driving means
  • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
  • F04D13/066—Floating-units
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
  • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
  • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
  • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
  • F04D15/0272—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being wear or a position
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D29/00—Details, component parts, or accessories
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
  • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

• the invention relates to a buoyant pump unit with the features specified in the preamble of claim 1.
• the state of the art includes buoyant pumps which suck liquid or water from these containers or bodies of water at the liquid surface of containers and waters.
• the use of such pumps proves to be problematic if the containers or bodies of water are formed closed and the liquids to be sucked are mixed with solid particles. This is due to the fact that these pumps sink with the liquid or water level falling through the pump work into a region of the containers or bodies near the bottom, in which the proportion of solid particles is generally considerably increased. This increases the risk that solids penetrate through the inlet openings in the pump and clog them, which is possibly associated with repairs, or at least consuming cleaning work.
• buoyant pump unit which is suitable for use in liquids mixed with solid particles, wherein the risk of clogging of the pump unit is at least significantly reduced.
• the pump unit according to the invention is buoyant and has an electric drive motor, a centrifugal pump driven therefrom, and an aggregate housing accommodating the drive motor and the centrifugal pump.
• the pump unit has at least one in the floating state under the liquid surface arranged inlet opening and at least one outlet opening.
• the unit housing is designed and arranged so that it changes its orientation relative to the floating position upon reaching a footprint, wherein position-controlled switching means are provided within the unit housing.
• the invention is based on the idea of designing and arranging the unit housing of the pump unit in such a way that, when it reaches a contact area, for example a floor of a container or the bottom of a body of water, because of a sinking liquid level by the pumping work, it will not find a firm footing there, that is, can not stand in stable equilibrium there, and therefore changes its orientation with further decreasing liquid level, the switching means with the alignment change of the unit housing also change their position and preferably turn off the pump unit or switch to a state in which stopped such Feststoffparti- cle be or can also be supported.
• the alignment changes of the unit housing and the switching means therein are typically done by tilting the unit housing from its floating position.
• the at least one inlet opening of the pump unit is expediently arranged on the unit housing in such a way that, when the unit housing reaches the contact area, it is in the liquid above a sediment to be expected in a container or body of water is arranged from solid particles.
• the centrifugal pump sucks in excessively solid particles that could possibly clog the pump unit.
• a further advantage of the pump unit according to the invention is the fact that this embodiment prevents dry running of the centrifugal pump.
• the pump unit according to the invention has a very high operational reliability.
• the aggregate housing In order that the aggregate housing can change its orientation when it reaches a contact surface with respect to its floating position, the aggregate housing is preferably designed such that it can tilt about an axis arranged in the contact region between the unit housing and the contact surface transversely to the direction of application of the liquid. After tilting, the aggregate housing on the footprint can come in a stable tilted position for surface contact.
• the unit housing advantageously has a tilting surface on a lower part in the floating state.
• the tilting surface in the sense of the invention is to be understood as meaning the surface with which the aggregate housing rests on the contact surface after tilting, the term tilting surface not being limited to a physically formed surface on the aggregate housing, but also encompassing such imaginary surfaces as those of FIG at least two spaced on the outside of the unit housing points on which the unit housing rests in a tilted position on the footprint formed.
• the unit housing tapers in a lower portion in the floating state downwards. That is, the unit housing runs in this lower section down towards pointed.
• a lower section of the unit housing may be embodied in the form of a cone or wedge, with the tip of the unit so formed.
• ten cone or wedge expediently is the part of the unit housing, which reaches a footprint in a container or body of water at sinking liquid level first. Such a point must be sufficiently blunt to prevent penetration into the footprint, it must be sufficiently pointed to ensure tilting.
• the tip then forms a tilt axis or part of a tilt axis about which the unit housing can be tilted.
• the outer side of the tapered lower portion of the unit housing can in this case form the tilting surface on which the aggregate housing rests on the contact surface after tilting.
• the lower section of the unit housing expediently tapers such that the unit housing may possibly not remain stuck in a muddy ground located on the container or water bottom in the floating position and in this way can not change its orientation.
• the lower end of this portion of the unit housing is advantageously flattened or rounded.
• a preferred development of the pump unit according to the invention provides to form the underside of the unit housing convexly curved.
• the aggregate housing may be e.g. on the lower part in the swimming position, tapering like a dome and being tilted around the vertex of its curvature.
• the outside of the arched area may form part of the tipping area that bears on a footprint.
• a preferably downwardly directed projection may be formed on the underside of the unit housing.
• This projection is expediently arranged and designed in such a way that it protrudes when a pump unit sinks in a container or body of water. g ⁇ t first reaches a footprint formed there, the aggregate housing then tilts around the free end of this projection during further lowering.
• the tilting surface of the unit housing is typically formed by an imaginary surface on which the free end of the projection and at least one further point spaced from the projection lie on the outside of the unit housing.
• the projection on the underside of the unit housing is arranged such that it is in the floating position of the pump unit in the direction of the liquid surface spaced from the center of gravity of the pump unit, so that the weight of the pump unit, when the projection has reached the footprint, a tilting moment the pump unit exerts.
• the unit housing in this embodiment has a clearly defined tilting surface.
• a tilt switch is preferably provided, which is designed and arranged such that it switches off the centrifugal pump at an alignment of the unit housing which deviates from the alignment in the floating state.
• the tilt switch may comprise a movably mounted in the switch member, wherein the component is designed and arranged such that it sets the inclination switch in the floating position of the pump unit in a the centrifugal pump einproofde position and at a change in alignment of the unit housing its position and thereby the tilt switch switches into a position switching off the centrifugal pump.
• the component movably arranged in the inclination switch it is advantageously rolling and preferably designed as a ball.
• the unit housing in a floating state above the liquid surface arranged region at least one perpendicular to the liquid surface aligned outlet opening.
• This outlet opening may be formed on a connection which is provided for fastening a hose line, with which the liquid can be discharged from a container or body of water.
• the pump unit according to the invention with an outlet opening arranged in this way can for example also form a fountain.
• the pump unit can be used floating in a basin or a pond and with the centrifugal pump turned on an emerging from the outlet water jet, which extends perpendicular to the water surface, generate.
• the outlet opening is formed at another point of the unit housing, possibly with a different orientation.
• the pump unit according to the invention may advantageously have at least one outlet opening, which is aligned in the floating state substantially parallel or obliquely to the liquid surface.
• the unit housing on at least two outlet openings, wherein either one of the two outlet openings with the pressure side of the centrifugal pump is line connected. Accordingly, means are provided with which a flow path from the outlet of the pump to an outlet opening is closed, while the flow path is opened to the other outlet opening.
• a flow path from the outlet of the pump to an outlet opening is closed, while the flow path is opened to the other outlet opening.
• 3/2 - way valve can be used.
• a part of the unit housing forming the tilting surface is preferably removable formed and covers a formed on the pump unit footprint.
• a fastening means can advantageously be formed on the lower part of the unit housing in the floating state.
• the attachment means may be e.g. to act a tab or eye to which, for example, a ground anchor can be attached.
• the pump unit has handling handles. These handling handles may be located on the outside of the power pack housing or from the power pack itself, e.g. be formed in the form of formed on the unit housing undercuts.
• 1 is a buoyant pump unit in a side view
• FIG. 2 shows the pump unit according to FIG. 1 in a second side view
• FIG. 3 shows the pump unit of FIG. 1 in a perspective view
• FIG. 4 shows the pump unit according to FIG. 1 in a perspective view rotated by 180 ° with respect to FIG. 3, FIG.
• FIG. 5 shows the pump unit according to Fig. 1 in longitudinal section
• FIG. 6 with the pump unit according to FIG. 1 with a removed lower section of the unit housing
• Fig. 8 shows the pump unit of FIG. 1 in a first tilted position
• FIG. 9 the pump unit of FIG. 1 in a second tilted position.
• the pump unit shown in the drawing has an aggregate housing 2.
• the pump unit is designed buoyant, wherein in the floating state, an aggregate housing part 4a is arranged largely above a liquid surface 6, while an aggregate housing part 4b is completely immersed in the liquid.
• buoyancy chambers 7a, 7b filled with air are formed in the unit housing part 4a (FIG. 5).
• the weight distribution in the pump unit is such that a longitudinal axis A of the unit housing 2 in the floating position of the pump unit is oriented essentially perpendicular to the liquid surface 6.
• the Aggreg ⁇ tgekorusemaschine 4a and 4b are formed substantially rotationally symmetrical to the longitudinal axis A.
• the unit housing 4a has a larger outer diameter than the unit housing part 4b, wherein an undercut 9 is formed on the unit housing part 4a at its area protruding beyond the outer diameter of the unit housing part 4b (FIG. 4). In this undercut are, distributed over the circumference, handles 1 1 arranged to handle the pump unit.
• inlet openings 8 are arranged distributed over the entire circumference of the unit housing part 4b in two rows spaced from one another in the direction of the longitudinal axis A.
• two outlet ports 10 and 12 are formed, which form the outlet openings of the pump unit.
• the outlet port 10 extends to the unit housing part 4a concentric with the longitudinal axis A to the outside, while the outlet 12 extends radially to this longitudinal axis A in a region of the aggregate housing part 4a to the outside, which lies in the floating state of the pump unit below the liquid surface 6.
• the outlet ports 10 and 12 are each provided with external threads so that hose lines can optionally be connected to these outlet ports via standard couplings.
• the outlet opening of the outlet nozzle 10 is closed by a cap 14 screwed onto the outlet nozzle 10.
• the outlet opening of the outlet connection 12 can also be closed with this closure cap 14.
• a centrifugal pump driven by an electric drive motor 16 is arranged with an impeller 20.
• an electrical connection 21 is arranged on the outside of the unit housing part 4b, to which a power supply and control cable can be connected. From the centrifugal pump liquid can be sucked from a container or body of water through the inlet openings 8 and from there via a marked with a direction arrow B flow path to the pump inlet.
• a part of the flow path on the output side of the centrifugal pump is formed by a rotary valve 20 mainly arranged in the unit housing part 4a.
• the rotary valve 20 has a hollow cylindrical rotary valve 22 through which a first recess 24 and a second recess 26 have on its peripheral side.
• the position of the recess 24 corresponds to the flow channel through the outlet port 12, while the position of the recess 26 corresponds to the position of a leading to the outlet port 10 flow channel.
• the rotary valve is rotatably mounted in the unit housing part 4a.
• the recesses 24 and 26 are arranged offset in the circumferential direction at an angle of 90 ° to each other.
• the rotary valve 20 can be rotated into a first position, in which the recess 24 releases a flow path into the outlet connection 12, but at the same time the flow path to the outlet connection 10 is closed.
• the resulting in this position of the rotary valve flow path from the outlet of the centrifugal pump to the exhaust port formed on the outlet 12 is indicated in Fig. 3 by the directional arrow C.
• the flow path to the outlet port 12 is closed and the flow path to the outlet port 10 is released.
• a tilt switch In the floating position of the pump set above the electric drive motor 16, a tilt switch is arranged, which has a cup-shaped running surface 30, a ball 32 and a microswitch 34. has.
• the Mikrosch ⁇ lter 34 is disposed in Wegl ⁇ ge the Pumpen ⁇ ggreg ⁇ ts below a trained on the tread 30 recess.
• the metallic ball 32 In the floating position, the metallic ball 32, which may be formed as a solid or hollow sphere, above the recess of the tread 30 and presses on the micro switch 34, which is thereby placed in a switching position in which the centrifugal pump is turned on.
• the ball 32 rolls on the running surface 30 away from the recess to the outside and accordingly no longer presses the microswitch 34, which thereby switches into a position switching off the centrifugal pump.
• the aggregate housing part 4b tapers in the floating position downwards initially conical and then passes into a lower portion 36, which is dome-shaped convex convex to the outside.
• a projection 38 to the outside On the outside of this portion 36 of the unit housing part 4b extends concentrically to the longitudinal axis A of the unit housing 2, a projection 38 to the outside.
• a recess 40 is formed, which forms a tab.
• This tab forms a fastening means with which the floating pump unit can be fastened by means of a rope or a chain to the bottom of a container or body of water, so that it can no longer change its position when floating.
• the aggregate housing part 4a distributed on its outer periphery also has a plurality of fastening tabs 42, by means of which the pump unit can also be fixed by ropes or wires.
• the operation of the pump set is as follows:
• the pump unit floats in a container or body of water in a floating position, in which the longitudinal axis A of the unit housing 2 is aligned perpendicular to the liquid surface 6.
• this Floatlägge is the ball 32 of the slope Schwelter arranged directly above the formed on the tread 30 recess and presses the microswitch 34 disposed below the recess in a switching position einclude the centrifugal pump.
• the centrifugal pump conveys liquid out of the container or body of water.
• the liquid surface 6 of the container or body of water and thus the pump unit sinks until the projection 38 arranged on the lower portion 36 of the unit housing part 4b contacts a contact surface 44 formed at the bottom of the container or body of water.
• the pump set does not stand firm on the footprint 44 and tilts over an edge of the projection 38 transverse to the longitudinal axis A of the unit housing 2 ( Figures 8 and 9).
• the edge of the projection 38 and a portion of the lower portion 36 of the Aggregate housing part 4b a tilting surface on which the pump unit rests on the footprint 44.
• the ball 32 of the tilt switch moves on the tread 30 away from the recess formed thereon outwards and so no longer contacts the microswitch 34, which then turns off the centrifugal pump.
• the height of the liquid surface 6 above the contact surface 44, the centrifugal pump is turned off by the tilt switch is largely determined by the design of the tilt switch.
• the inclination switch can be designed such that the ball 32 leaves its microswitch 34 contacting position only at a larger angle of inclination a, and so the centrifugal pump at a lower liquid level above the footprint 44 turns off (Fig. 9).
• the lower section 36 of the unit housing part 4b is detachably formed by releasing a latching connection via a pushbutton 46, wherein after removal it forms a substantially formed on the unit housing part 4b.
• chen level footing 48 releases, which is aligned normal to the longitudinal axis A of the unit housing (Fig. 6). With this level base 48, the pump unit can stand on a footprint 44 without tipping over (Fig. 7) and thus without switching off.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

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ID=39712510

Family Applications (1)

Country Status (4)

Cited By (1)

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Citations (5)

Family Cites Families (6)

• 2008
  • 2008-03-07 EP EP08004212A patent/EP2098732A1/de not_active Withdrawn
• 2009
  • 2009-02-21 CN CN2009801080706A patent/CN101960147B/zh not_active Expired - Fee Related
  • 2009-02-21 WO PCT/EP2009/001261 patent/WO2009109305A2/de active Application Filing
  • 2009-02-21 US US12/920,466 patent/US20110123357A1/en not_active Abandoned

Patent Citations (5)

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