EP0992686A2 - Valve operated discharge control of a household pump - Google Patents

Abstract

The pump unit has a pump driven by an electric motor, provided with a pump chamber (8) having a pump input (10) and a pump output (11) and integrated flow control and/or monitoring devices (26,27), e.g. inserted in a pressure line (25) connected to the pump output. Also included are Independent claims for the following: (a) a non-return valve; (b) a pressure-sensitive switching device

Description

The invention relates to a liquid pump arrangement, in particular for use in the home and / or garden, according to the preamble of claim 1.

Constantly increasing water fees and an improved environmental awareness cause more and more house and / or garden owners to to install dual water use systems and so alternatively or in addition to drinking water, rainwater too use. This can be used to pump water to collection points such as ponds, cisterns or the like different to consumers Liquid pump arrangements are used for example submersible pumps, garden pumps, fountain pumps or the like Above all in permanently installed rain use systems domestic waterworks are also used, for example collected rainwater from an appropriate reservoir through a pipe system separate from the drinking water supply network to rainwater consumers such as toilets, washing machines, Showers or the like to promote.

Different operating conditions may be required make pumps with different designs and different Skills to use. The purchase of However, several special pumps is expensive and is therefore only available in considered rare cases. It also results on the manufacturer side an increased effort if special pumps with different Interpretations are to be made. Not infrequently therefore on the manufacturer side as on the user side Compromise solutions chosen, in which the ratio of used Cost is not optimal for the benefit available.

The invention is based, above all in propose improved liquid pump arrangement in this regard.

This object is achieved by a liquid pump arrangement with the features of claim 1. Advantageous further developments are specified in the dependent claims, the Wording made by reference to the content of the description becomes.

A liquid pump arrangement according to the invention has one Liquid pump with at least one to a pump chamber the liquid pump leading pump inlet through which Liquid can be sucked in or introduced, and at least a pump outlet leading from the pump chamber for delivery of pressurized liquid, one through the pump conveyable liquid flow through the pump inlet and pump outlet leads. According to the invention, the liquid pump arrangement at least one in the structure of the liquid pump arrangement integrable, flow-through functional unit to influence and / or monitor the Liquid flow assigned. So it will be a modular one Pump structure proposed in which at least one in the However, usually several components as separate units or modules are provided, each one or more generally perform self-contained functions. You can work independently and independently exchanged from each other or when not needed be omitted. The proposed modular design makes service and maintenance easier, on the one hand, because a functional unit, for example, for cleaning easily removed from the pump assembly or location-independent in the event of defects repaired by the pump or by a similar functional functional unit is interchangeable. Moreover The modular structure enables it, in the manner of a modular system a general-purpose basic device through installation or omitting certain functional groups exactly at the intended ones Adapt application purpose so that for every application an optimally configured liquid pump arrangement can be used.

The invention is particularly an integration of several Functional groups in the mechanical structure of a pump arrangement possible with a small overall volume of the overall arrangement, So a compact pump unit with the operating conditions customizable properties.

It is particularly advantageous if the functional units are so are designed so that, if necessary, by simple line sections, for example, appropriately dimensioned pipe sections, can be replaced. It is therefore advantageous if a functional unit a liquid inlet and a Liquid leakage forms in the manner of connecting pieces a line connection are formed. It can be provided if necessary be that at least one functional unit without the aid of tools can be installed at the intended installation location or can be removed from the liquid pump arrangement, so that this work quickly and without special preparation simply at the installation site of the liquid pump arrangement are feasible at any time. A liquid entry and / or a liquid outlet can be a threaded nozzle section have a screw connection with an adjacent one Establish line section. Alternatively it is For example, it is also possible for liquid to enter and / or to design a liquid outlet as a connector, which can be plugged into a complementary line piece this is attachable. Plug connections are special preferred if relative due to the installation environment Rotary movements of the parts to be connected or cumbersome are impossible. In any case, the connection points be made liquid-tight by one or more Round cord seals or other elastic sealing elements be provided.

In one development, a functional unit is used as a check valve formed, which is preferably immediately downstream the pump outlet in a pressure line of the pump body is arranged or can be arranged. This can cause reflux of liquid from the line system connected on the pressure side be prevented into the pump chamber. Especially a check valve unit, which is a housing, is preferred and one that can be removed from the housing, preferably without tools Valve insert. This creates the opportunity if necessary, all to be maintained, in particular to be cleaned and / or exposed to calcification or constipation Components and remove them outside the Clean liquid pump arrangement or individually if necessary or exchange in groups. This removal is advantageous possible without the cable routing between the pump outlet and a downstream pressure line must be because the flow-through housing with the liquid pump arrangement can stay connected.

In a preferred embodiment, the check valve unit forms an angular connection between liquid inlet and fluid leakage by the fluid leakage at an angle, preferably a right angle to Fluid entry is aligned. This angular connection enables a particularly compact construction of the liquid pump arrangement and creates a convenient removal option for the valve insert. For this purpose, the housing of the check valve unit in addition to the valve or liquid inlet and a removal opening for the valve or liquid outlet have for valve use, in particular in extension of one of the connections, e.g. of entry can be. Thereby the valve insert e.g. in Extension of the inflow direction can be removed. The removal opening can by a preferably manually operated closure member, especially a screw cap, liquid-tight be lockable. The structure of a preferred embodiment, where both a valve seat element, as well the movable valve body can be removed is an example explained in connection with the drawing figures.

In a further development it can be provided that a functional unit as trained to emit a flow signal Flow sensor unit is formed. This can be upstream position of the pump inlet but preferably on the pressure side, i.e. downstream of the Pump outlet, arranged or can be arranged.

A flow detection can for example by a Flow sensor unit with at least one through the liquid flow drivable water wheel are made possible Rotation in particular mechanically, electrically and / or can be magnetically detectable. Another, related with the drawing figures exemplified Embodiment is the flow sensor unit in one Check valve unit integrated, so that a separate Housing for the flow sensor unit and a provided for this Installation space is not necessary if both a Check valve, as well as flow detection desired is. For the flow detection depending on the Liquid flow movement of the valve body is used become. It can be movable with the valve body Magnetic element and at least one along the adjustment path of the valve body arranged magnetic field sensitive sensor, e.g. a Hall sensor can be provided which the flow signal delivers.

In a further development, a functional unit can be preferred manually operated drain valve to be formed can be installed downstream of the pump outlet. The emptying the downstream pipe sections can be outdoors or into a connected collection container. It is also possible to connect the drain valve to the Pump outlet downstream pressure line with the pump chamber to use, this connection preferably when switched off Pump can be manufactured. This makes it possible an emptying of one connected to the pump on the pressure side Pipe system through the pump chamber, where the drained liquid is, for example, about a drain valve of the liquid pump arrangement and / or via a suction line connected on the suction side can. This is done in a preferred embodiment possible that the check valve unit as a drain valve is designed so that a separate drain valve to be provided is not necessary. This functional extension the check valve unit can thereby be created be that this is a preferably manually operable, in particular rotatable control member for lifting the valve body from the valve seat, this lifting only on the position of the tax body and not on the input side and depends on the pressure conditions present on the output side.

The possibility of actuating the valve body independently of the pressure ratios can also be used to Start pump start by venting the inside of the pump through the open check valve perform so that the check valve unit also can take over the function of a vent valve. It is also possible, a separate, serving as a vent valve To provide functional unit.

In a further development it is provided that a functional unit is designed as a pressure switch unit, which is downstream of the pump outlet arranged or can be arranged and their signal can be used to control the pump can. Alternatively or in addition, it is also possible to a suitably attached functional unit the inlet pressure monitor and the appropriate pressure signal for control purposes to use. In a preferred embodiment the pressure switch unit in the manner of a connecting pipe sleeve trained transition piece, of which at least one Liquid channel, for example, radial to the main liquid flow to one arranged to the side of the transition pipe Pressure switch device that leads to a compact Can form a unit with the transition piece. A pressure switch unit can, for example, immediately after a check valve provided if necessary or further from this spaced, for example, just before a pump outlet connection be arranged. A preferred use of the by the Pressure switch unit generated pressure signal is related explained in more detail with the embodiments. Alternatively or in addition to a pressure switch can also be a pressure sensor be provided, if necessary in a separate functional unit.

As mentioned, multiple functions can be in a single Module be united. In one embodiment, one is Combined assembly of flow sensor and pressure switch provided, the flow sensor having a water wheel and the pressure switch is arranged transversely to the flow axis.

The pressure switch and the flow detection as well as any other Sensors can act as sensors as part of a controller pump operation. Depending on the version and The pump arrangement can be used for individual functional units or components are omitted, with the modular composition of the basic device including the Housing structure can remain unchanged. The not needed Components or functional units can preferably be simple be replaced by standard pipe sections.

These and other features go beyond the claims also from the description and the drawings, wherein the individual characteristics individually or in groups in the form of sub-combinations in one embodiment the invention and in other fields can represent advantageous designs.

Fig. 1

eine schrägperspektivische Ansicht einer Ausführungsform einer erfindungsgemäßen Flüssigkeitspumpe,

Fig. 2

einen teilweisen vertikalen Längsschnitt durch eine andere Ausführungsform einer Flüssigkeitspumpe ähnlich Fig. 1,

Fig. 3

einen Schnitt durch einen entnehmbaren Filterstutzen der Ausführungsform gemäß Fig. 2,

Fig. 4

einen Längsschnitt durch eine entnehmbare Rückschlagventileinheit der Ausführungsform gemäß Fig. 2,

Fig. 5

einen Längsschnitt durch die in Fig. 4 gezeigte Rückschlagventileinheit in einer um 90° versetzten Schnittebene,

Fig. 6

einen Schnitt durch eine entnehmbare Druckschaltereinheit der Ausführungsform nach Fig. 2,

Fig. 7

einen Schnitt durch einen als Handgriff dienenden Druckstutzen der Ausführungsform nach Fig. 2 und

Fig. 8

einen Schnitt durch das Ablaßventil der in Fig. 2 gezeigten Ausführungsform.

An embodiment of the invention is shown in the drawings and is explained in more detail below. The drawings show:

Fig. 1

2 shows an oblique perspective view of an embodiment of a liquid pump according to the invention,

Fig. 2

2 shows a partial vertical longitudinal section through another embodiment of a liquid pump similar to FIG. 1,

Fig. 3

3 shows a section through a removable filter connection of the embodiment according to FIG. 2,

Fig. 4

3 shows a longitudinal section through a removable check valve unit of the embodiment according to FIG. 2,

Fig. 5

3 shows a longitudinal section through the check valve unit shown in FIG. 4 in a sectional plane offset by 90 °,

Fig. 6

3 shows a section through a removable pressure switch unit of the embodiment according to FIG. 2,

Fig. 7

a section through a serving as a handle pressure port of the embodiment of FIGS. 2 and

Fig. 8

a section through the drain valve of the embodiment shown in Fig. 2.

Figures 1 and 2 are overall views of substantially Identical embodiments of a liquid pump arrangement 1, which is shown in particular for applications in Home and garden is provided and preferably as a pump a domestic waterworks can be used. It has a largely housing 2 made of stable, impact-resistant plastic, on the underside there are recesses for three feet 3 are. You define a standing level of the pump and pass preferably essentially rubber-like soft Material, for example made of a soft thermoplastic. The Feet enable a soundproof, stable stand Installation of the pump. In the housing is an electric motor operated, air-cooled by means of a fan 4 Integrated liquid pump 5, the pump impeller 6 around the one parallel to the stand level, usually horizontally aligned Pump axis 7 rotates within a pump chamber 8. The pump chamber 8 is formed by a substantially dome-shaped Chamber housing 9 limits that in the shown in Fig. 2 Embodiment made of the same plastic material how the housing is, in other embodiments Increasing the compressive strength also from metal, for example stainless steel. At the top of the chamber housing are parallel to each other and perpendicular to the pump axis 7, a leading into the chamber 8, rounder in cross section Pump inlet 10 and a leading from the chamber 8, in cross section Round pump outlet 11 arranged. In the floor area of the chamber housing or in one connected to the pump chamber Base (Fig. 1) is a horizontal, to the pump axis 7 parallel nozzle 12 with an internal thread for receiving a screw-in drain valve 13 is provided.

On the suction side of the pump is a related Fig. 3 described in more detail in the provided with internal thread Pump inlet screw-in filter connector 15 is provided. On this, which can also be designated as an inlet connection, replaceable Plastic component is an upper, in the axial extension the pump inlet and the level of the pump above of the upper end of all pump chambers, circular fill opening 16 is provided, for example liquid into the pump chamber before starting the pump can be filled. The inlet opening is through a screw cap 17 provided with a seal can be closed. The diameter of the filling opening 16 is advantageous chosen so large that a in the filter socket 15th Dirt sieve 18 that can be inserted from above and has a conical section shape with U-shaped handle from above through the filler opening inserted in the filter socket or removed upwards can be. When the filter or sieve 18 is inserted outward edge at the upper end of the sieve body on an inner shoulder of the filter socket and the inside of the screw cap 17 presses lightly on the bracket 19, so that the filter insert 18 is clamped wobble-free. Advantageously is also an inlet opening 20 on the suction side for drawing in liquid above the upper edge of the pump chamber and above or upstream of the strainer 18 arranged. The inlet opening 20 is through one at the top End region of the filter connector 15 projecting horizontally, with externally threaded connector 21 formed, the horizontal Axis with the filter socket fully screwed in runs essentially parallel to the pump axis 7. By the advantageous arrangement of the suction opening and the suction inlet opening on the suction side in front of one Dirt filter device 18 can reliably inside the pump against penetrating particles, such as dirt particles, Pieces of wood or the like to be protected. The filter 18 is after Unscrew the lid 17 for easy removal. The fact that the filter socket with inlet opening and filling opening and integrated filter device by unscrewing Easily removable from the pump inlet and correspondingly light the pump can be replaced in this area Screw in a differently dimensioned filter socket can be modified in a simple manner with respect to the dimensions, for example to adapt to specially dimensioned supply lines to enable. It is a complete one Removable or replaceable input filter module created.

On the outlet side or pressure side of the pump are in the Pump outlet 11 downstream pressure line 25 more advantageous functional modules in the form of interchangeable modules, i.e. in the form of assemblies that one or more in take on essentially self-contained functions, provided. In the embodiment shown is located directly or immediately downstream of the pump outlet 11 explained in connection with Figures 4 and 5 in detail Check valve unit 26 and, this immediately downstream, one explained in connection with FIG. 6 Pressure switch unit 27, both advantageous in the housing shape are integrated. The check valve unit 26 forms an angular connection enclosing an angle of 90 ° between the upwardly discharging pump outlet 11 and the horizontal direction of the pressure line leading to the side 25. Between a side outlet port of the check valve unit 26 and the entrance of a serving as a handle Pressure port 28 is with a transition port Pressure switch unit 27 inserted, the functional elements the pressure switch on the side next to that in the pressure line extending liquid flow are arranged. The pressure switch unit is advantageously in the liquid flow formed by the check valve to the pressure line Angle inserted in a particularly space-saving manner.

Downstream of the pressure switch unit 27 is related with Fig. 7 explained in more detail than rigid or rigid Tube designed pressure pipe 28 is provided, the sections free to form a handle opening 29 runs above the housing 2 parallel to the pump axis 7. The free-floating section lies approximately above the center of mass the overall pump arrangement and can be used as a handle serve for the pump arrangement. Following this flowable handle 30 is in the course of the leading Pressure line provided a hinge connection 31, the one radial to the pressure line axis leading through the handle 32 aligned side output port 33. Another output terminal 34, separate from this, is located in extension of the handle 30 on the axis 32 and is aligned with the inlet opening 20 on the suction side in the example.

The structure of these various functional units is described in following together with the respectively achievable functions and Advantages described in more detail.

The embodiment which can be seen particularly well in FIGS. 4 and 5 the check valve unit 26 has a substantially cylindrical plastic housing 40, at the bottom End forming a radial shoulder as a valve inlet serving inlet connector 42 with a plurality of circumferential grooves are provided for receiving round cord seals. On serving as valve outlet outlet connector 43 with external thread and circumferential groove for receiving a round cord seal protrudes in the upper region of the housing 40 at an angle of 90 ° to the inlet port from the housing 40. Above the outlet nozzle is another housing opening on the housing that is open at the top 41 with an internal thread section for receiving a screw cap 44 is provided. In the housing section between Inlet port and outlet port is one in FIG. 5 easily recognizable, offset by 90 ° compared to the outlet nozzle, through opening through the housing opening 45 for a manually operated rotating device described below Control member 46 provided. Above the transverse opening 45 is at the level of the outlet nozzle 43, offset by 90 ° to this, a housing wall recess for receiving a magnetic field sensitive Sensor 47, for example a Hall sensor, educated.

Inside the housing 40 is a completely removable Valve insert 49 arranged. This includes a valve seat element 50, which is one of the cylindrical inner contour of the upper area of the valve housing adapted cylindrical outer contour with two axially offset circumferential grooves, of which the upper to hold one of the seals against the inner wall of the housing serving cord seal 51 and the lower one for insertion of locking pins that can be inserted radially through the housing wall 52 serves. The valve seat member 50 is installed Condition on an inward facing shoulder of the Housing wall above the transverse opening 45 and is through the pins 52 secured against falling out. One at the bottom End of a cylindrical guide opening 53 of the valve seat element provided inward shoulder 54 serves as the valve seat of the check valve.

One that interacts with the valve seat as a shut-off element serving spring-loaded, self-resetting valve body 55 has an internally hollow, cylindrical shaft 56, which on the side facing the valve seat below a web 57 a receiving groove for a cooperating with the valve seat 54 elastic cord seal 58 has. On shaft 56 is a radial, on the side facing the magnetic field sensor 47 cylindrical receptacle designed for a permanent magnet 48, the one with the valve closed below the magnetic field sensor and arranged outside of its effective range is. Between the circumferential collar 57 of the valve body and the cylindrical guide opening 53 of the valve seat element there remains a small gap with slight lifting of the sealing ring 58 from the valve seat serve as a leakage flow channel can. This only for a line with low leakage currents provided ring channel is only over a short displacement of the valve body from the shut-off function. Once the all-round collar in the area above the valve seat element 50 is lifted off, there is a significantly larger flow cross-section between the inlet and outlet of the valve Available.

A conical tip 59 of the valve body protrudes when closed Valve (Fig. 4 and 5) through the central circular opening of the valve seat element in the area of the control member 46. At the opposite, open end of the valve body is a plate widening conically upwards, the among other things the support of a conically wound compression spring serves, whose opposite, wider end is at concave inward curved head portion 61 of the screw cap 44 supports. The one with an external thread and one arranged within the front concave recess Handle bar 62 provided screw cap has on the inside an axially extending guide element 63 with a cruciform Cross section that is essentially free of play in the cylindrical interior of the valve body is insertable and the axially sliding guidance of the valve body is used.

The multi-part control element which can be inserted into the transverse opening 45 46 has an inside of the valve housing below the Opening of the valve seat element can be arranged and flowed through Ball element 65 on which one about the axis of rotation of the control member V-shaped cam contour 66 running around is provided with the conical tip 59 of the valve body interacts for axial displacement of the valve body. The cam contour is designed so that in the no release position shown in Figures 2, 4 and 5 There is contact between the ball element and the valve body, so that the compression spring 60 seals the valve body presses on the valve seat while turning the Control member, for example, through 120 ° of the valve body the cam contour against the force of the compression spring from the valve seat is lifted off so that a flow path from the inlet port 42 through the ball element and the valve seat area to the outlet port 43 or vice versa. Hereby is an opening of the valve independent of that between the Connections available pressure conditions possible, in particular even if 43 the pressure is higher than in the area of the inlet connection 42. The check valve effect is thus by actuation of the control member 46 can be canceled.

The valve insert 49 is a complete assembly if necessary Unscrew the cover 44, with the switching cover 44 and the valve body guided and carried by it normally stay connected and the valve seat element may also remain in the housing 40. Particularly advantageous affects the angular version of the check valve device from which a removal of the valve insert in Continuation of the direction of the incoming fluid allows. This means that the valve insert can be installed with a check valve device can be removed without the rest Structure of the pump assembly is affected, in particular also without having to remove other components. The control member 46 is also due to its multi-part structure removable.

Thanks to the control member 46, the embodiment shown is the Check valve unit at the same time as drain valve educated. For example, at the start of pump operation by opening the valve in the suction area if necessary and / or air in the pump chamber is first removed be before the pure liquid pumping operation is recorded. Because of the compressibility of air can without this option at the start of pump operation Functional impairments result. In normal operation the pump, on the other hand, is the control element out of engagement with the Valve body, so that this only through sufficient inlet-side Overpressure is movable in the open position.

Furthermore, it is by means of manual opening of the valve Control device 46 possible, with the pump switched off a connected Line system through the check valve device for example through the open drain valve or to empty through the intake manifold, so that the valve unit also forms a drain valve.

The embodiment of the check valve unit shown also acts as a flow sensor, one through a pump controller easily processable electrical flow signal delivers. This is the displacement of the valve body 55 detected by the magnetic field sensor 47 as soon as the permanent magnet 48 is shifted into the effective range of the sensor 47 is. The embodiment shown is designed so that with little displacement of the valve body by the Effect of a low leakage current of the permanent magnet from the sensor is not yet detected. Only with a stronger shift of the valve body, the measure of which from the current liquid flow depends, the permanent magnet is in the detection area of the magnetic field sensor and delivers one of the amount of liquid allowed per unit of time dependent Flow signal. The advantageous training at the low Leakage currents do not produce a flow signal, in particular important if the pump is in accordance with the sensor signal the flow sensor is controlled, in particular by switch the pump on or off. These shifts will be accordingly not caused by low leakage currents, but only through substantial withdrawals at the Printed page.

A flow sensor can also use another principle work, for example by means of a liquid flow arranged rotating water wheel, the rotation of which e.g. is monitored mechanically, electrically or magnetically or with other electrical, electromagnetic, magnetic or optical means. Alternatively or in addition to one flow sensor integrated in the check valve unit a flow sensor can also be used elsewhere in the laxative Pressure line, for example immediately before the outlet connections or provided on the inlet side of the pump his.

The described embodiment of the check valve unit thus combines at least four functions by: in addition to the function as a check valve, also a function as a drain valve, as a vent valve and as a flow sensor provides. These functions can be used by others Embodiments also through separate components or modules and / or elsewhere in the laxative area Pressure line may be provided.

In the pressure switch unit, which can be seen particularly well in FIG. 6 27, a transition piece 70 is provided, which according to Kind of a connecting pipe sleeve is formed and on both axial ends 71, 72 with internally threaded receiving openings for screwing in pipe pieces or the like. having. The Functional elements of the pressure switch are on the side next to the between the ends 71, 72 extending liquid flow or formed in one piece with the transition piece 70 Pressure switch housing 73 housed. One in cross section small radial channel 74 connects the inside of the nozzle 70 with the interior of the housing 73 and is replaced by a flexible membrane 75 closed liquid-tight. At the side of the membrane 75 facing away from the channel is supported within of the housing 73 axially movably mounted switch body 76, which is attached to the membrane by means of a spiral compression spring is pressed. This is based on an adjusting screw 77 from the adjustment of the spring pressure on the body 76 serves and within a housing 73 that closes the outside Screw cover 78 is guided. The switch body 76 acts via a hinged switch lever 79, which by a Recess of the housing wall is guided to the outside Electrical switch 80 attached to the outside of the housing a dependent on the fluid pressure within the nozzle 70, pressure signal that can be further processed by a pump control delivers. Instead of the electromechanical switch other pressure switches are also possible. A pressure switch unit can also be firmly connected to the pump housing and be structurally integrated into it. If a pressure switch unit not or not at the example shown in Fig. 2 Point is needed, so the pressure switch module can be replaced by a simple connecting pipe sleeve.

The one downstream of the pressure switch unit 27, in FIG. 7 pressure connection 28, which is particularly easy to recognize, forms at the same time the handle or handle 30 of the pump assembly and can improve grip at least in the grip Area of an outer contour that improves grip for example with longitudinal grooves or the like. (Fig. 1) have.

The swivel joint 31 arranged in the exit area has a sleeve with a lateral or radial connection 33, the infinitely and infinitely around the pressure line axis 32 is rotatably mounted and with round cord seals 85 is sealed. Via slot-shaped wall openings 86 in Pressure pipe can water from the axial direction Pressure line laterally to the radial outlet 33 of the Exit swivel 31. Both the side exit 33 of the Swivel joint as well as in the direction of that lying in axis 32 Front outlet 34 of the pressure line are, preferably separately, lockable, for example by screwing on a screw cap. Common connectors, in particular screwed on tap pieces with quick coupling nipples become. On the one hand, the swivel joint offers the possibility a second consumer to the pump without a separate one To connect branching piece. In addition, through the unlimited and continuous rotation of the swivel second connection 33 in different, for the respective use optimal directions are rotated. For a position of the swivel joint with unused second output 33 is in shown example, a U-shaped housing recess 87 is provided, in which the side connector 33 can be rotated.

This is preferably sized so that it, for example also a connector screwed onto the connector can record with water stop.

In the embodiment shown, it is also advantageous the opposite, axially parallel orientation of the suction connection 20 at the pump inlet and the axial outlet 34 of the leading pressure line at the pump outlet, which make it possible the liquid pump 1 in an otherwise straight line Install the pipe run.

An advantageous use of a pump arrangement with at least Two separate pump outlet connections can also be made in it can be seen that at an exit, especially in Output 34 lying along the longitudinal axis, e.g. pneumatic Pressure accumulator can be connected, in particular for the mode of operation the pump as a domestic waterworks or in a comparable one Operating mode can be advantageous, for example to cause buffering.

The modular structure with separately functioning and Units that can be installed or removed individually or in groups offers as a special advantage that instead of building units simple line elements can also be used can. For example, for applications where a Check valve and / or a pressure switch is not required the component that is not required by a simple Pipe element with identical installation dimensions replaced become. For example, the embodiment shown in FIG. 2 be completed by the check valve unit 26 through a 90 ° elbow and the pressure switch unit 27 is replaced by a connecting pipe sleeve. If only one pump outlet is required, for example also the pressure port 28 without swivel connection 31 his. A connection can be made with a domestic water supply network can be connected and to the others a drain valve connected via which the line network, e.g. for maintenance work that can be emptied without to disconnect from the pump and without the pump self-draining, which is usually manual venting the pump is required before restarting.

The embodiment shown in Fig. 2 has a laterally on Motor part of the pump fixed pump switch 90. At Another embodiment is a contact field in this area provided with a removable switching device mechanically attached to the pump and at the same time can be electrically connected to this. In particular the pump, in addition or as an alternative to an operating mode switch a timer can be assigned, for example is attachable to the pump. On possibly existing pressure switch and / or an existing one Sensor for the flow status of the check valve can be connected to the switch or timer.

The signals from the pressure switch device and / or the check valve can advantageously for pump control, especially used to switch the pump on and off become. Additionally or alternatively, a A time program can be specified. Another advantageous control option, especially when used a pump arrangement of the type mentioned in the garden to see that with the help of a pressure switch unit Pump when reaching a pressure close to that without consumer withdrawal maximum achievable maximum pressure switched off with a restart advantageously only when the pressure has dropped sharply and / or upon detection of larger flow rates through an existing check valve he follows.

When switching on a consumer, e.g. a garden sprayer, of a sprinkler, a spray gun or the like, the pressure drops immediately and the pump switches on. During operation of the pump and the activated consumer, the pressure remains below the threshold. Only after switching off the consumer the pressure rises very quickly above the switching threshold on and the pump switches off. Such a pressure control arrangement can be particularly simple, inexpensive and not very sensitive be carried out, since usually the existing low Switching hysteresis preferably used pressure switch as well as the time delay in the shutdown for such a pressure-controlled operation of the liquid pump is sufficient. As mentioned, it is also possible to have a small print buffer and / or a pressure switch with two explicit, spaced switching thresholds for generation to use a larger hysteresis.

The control options for the pump are advantageous for a pump with integrated Control device possible, which is preferably programmable can be. By directly in the structure of the pump arrangement integrated control device, for example as Attachment to the pump housing can be omitted the need for controls via a separate feed line or for example by inserting a control device into the power supply line, e.g. a timer or the like. The control device can be an electrical Sub-unit or as a control module also from the pump arrangement be detachable, so that depending on the intended application various, specially designed control units are also provided can be or, with unchanged pump construction also a variant with a conventional switch instead a more complex control device is possible. The control device can in particular with removable design via plug contacts on a permanently connected to the pump arrangement Contact field can be plugged on.

The preferably tool-free removability of the control device from the pump can also be advantageous for programming the control unit either via a portable Programming device or via a possibly far away from the Pump provided programming device, for example a Computer, be cheap. A control device of this type can contain different functions individually or in combination, for example a wireless controller, e.g. about Radio, a control according to a specified time and / or a Control according to at least one sensor signal. This can be done independently of the pump, for example a precipitation sensor or soil moisture sensor is provided be, and / or by at least one the operating state the pump indicating sensor, for example a Pump outlet pressure sensor or switch and / or one Flow sensor.

Claims (17)

Liquid pump arrangement, especially for use in the house and / or garden, with a liquid pump (5) with at least one to a pump chamber (8) the liquid inlet leading pump inlet (10) and at least one pump outlet leading away from the pump chamber (11), one pumpable Liquid flow through the pump inlet and pump outlet leads, characterized in that the liquid pump arrangement at least one in the structure of the liquid pump arrangement integrable, flow-through functional unit (26, 27) for influencing and / or monitoring is assigned to the liquid flow. Liquid pump arrangement according to claim 1, characterized in that a functional unit enters a liquid (42, 71) and a liquid outlet (43, 72) forms one in the manner of connecting pieces Line connection are formed, preferably the liquid entry and / or the liquid exit has a threaded nozzle section which for preferably with liquid-tight screw connection a line piece is formed and / or that the Fluid entry and / or fluid exit is designed as a plug-in socket, which preferably liquid-tight plugging or plugging onto one Line section is formed. Liquid pump arrangement according to claim 1 or 2, characterized characterized as being a downstream of the pump outlet (11) can be arranged pressure line (25) and that at least one functional unit (26, 27) in the Pressure line can be integrated. Liquid pump arrangement according to one of the preceding Claims, characterized in that a functional unit designed as a check valve unit (26) is, which is preferably immediately downstream of the Pump outlet arranged or can be arranged, in particular can be inserted into the pump outlet, preferably the check valve unit has a housing (40) and one has valve insert (49) which can be removed from the housing, preferably the valve insert (49) without With the help of tools that can be removed from the housing (40) or can be used. Liquid pump arrangement according to one of claims 2 to 4, in particular according to claim 4, characterized in that the liquid inlet (42) and the Liquid outlet (43) at an angle, preferably at a right angle to each other. Liquid pump arrangement according to one of claims 4 or 5, characterized in that the housing (40) additionally to the liquid inlet (42) and the liquid outlet (43) a removal opening (41) for the Has valve insert (49), the removal opening preferably in the extension of the liquid inlet (42) is arranged and / or wherein a preferably manual actuatable closure member provided for the removal opening is, in particular a screw cap (44). Liquid pump arrangement according to one of claims 4 to 6, characterized in that the check valve unit (26) a removable from a housing (40) Valve seat element (50) and / or that the valve insert (49) a removable, movable within the housing (40) arrangable valve body (55), the preferably at least one interchangeable, rubber-elastic Sealing element (58) for cooperation with the Valve seat. Liquid pump arrangement according to one of the preceding Claims, characterized in that a functional unit as designed to emit a flow signal Flow sensor unit (26) is formed, which are preferably downstream of the pump outlet (11) is arranged or can be arranged, preferably the Flow sensor unit in the check valve unit (26) is integrated, wherein it is preferably a with the Check valve unit movable valve body (55) Magnetic element and at least one along the Adjustment path of the valve body arranged magnetic field sensitive Sensor (47), in particular a Hall sensor having. Liquid pump arrangement according to claim 8, characterized characterized in that the flow sensor unit at least a drivable by the liquid flow Has water wheel, the rotation of which generates the Flow signal preferably mechanical, electrical and / or is magnetically detectable. Liquid pump arrangement according to one of the preceding Claims, characterized in that a functional unit (26) as preferably manually operable Drain valve is formed, the downstream of the Pump output (11) is arranged or can be arranged, wherein the drain valve preferably for connection a pressure line downstream of the pump outlet (25) with the pump chamber (8), in particular when the pump is switched off Pump, is provided. Liquid pump arrangement according to one of claims 4 to 10, characterized in that the check valve unit (26) as preferably manually operable Drain valve is formed. Liquid pump arrangement according to one of claims 4 to 11, characterized in that the check valve unit (26) a preferably manually operable, in particular rotatable control member (46) for lifting the Has valve body (55) from the valve seat (54). Liquid pump arrangement according to one of the preceding Claims, characterized in that a functional unit is designed as a pressure switch unit, which are preferably arranged downstream of the pump outlet or can be arranged, preferably the Pressure switch unit (26) in the manner of a connecting pipe sleeve trained transition piece (70), from which at least one liquid channel (74) a pressure switch device arranged on the side of the transition piece leads. Liquid pump arrangement according to one of the preceding Claims, characterized in that they are upstream an inlet opening (20) of the pump inlet (10) and preferably one separate from the inlet opening Has filler opening (16), the inlet opening (20) and preferably the filling opening, based on a footprint of the liquid pump arrangement above the pump chamber (8) is arranged, preferably between the inlet opening (20) and / or the filling opening and preferably the pump inlet (10) interchangeable filter device (18) is arranged. Liquid pump arrangement according to one of the preceding Claims, characterized in that a downstream of the pump outlet (11) arranged line section a pressure line (25) as a rigid tube is designed to form a handle (30) self-supporting in sections. Check valve unit, especially for installation downstream a pump outlet of a liquid pump arrangement according to one of the preceding claims, characterized by the characteristics of the characteristic part of at least one of claims 4 to 12. Pressure sensitive unit, especially pressure switch unit, especially for installation downstream of a pump outlet a liquid pump arrangement according to a of claims 1 to 13, characterized in that the Pressure switch unit (26) in the manner of a connecting sleeve trained transition piece (70), from which at least one liquid channel (74) to one Pressure switch device arranged to the side of the transition piece leads.

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