EP2698544A1 - Submerged pump, resting on a ground, with adjustable suction height - Google Patents

Abstract

The submerged pump has pump housing which is provided with a base surface (AE). A motor propelled conveyor element (PR) is provided in pump chamber (PK) for conveying water from inlet to outlet of a flow path by pump. The adjusting structures (EF,ES) are arranged for limiting the flow path upstream of conveyor element, and are transversely sealed to the flow direction output channel. The adjusting structures are moved relative to pump housing, and are adjusted in several positions over base surface at different heights (FH).

Description

The invention relates to a submersible pump.

Submersible pumps have an opening pointing downwards in the direction of a footprint of an intake duct. The intake passage forms a portion of a flow path for the fluid to be conveyed, typically water, upstream of a motor-driven delivery member. The intake passage is closed airtight to the flow direction substantially airtight. The conveyor member is typically an impeller rotating about a vertical axis and disposed in a pumping chamber. The output channel opens into the pump chamber in the flow direction of the water conveyed by the impeller. The upper edge of an upstream inlet determines the minimum residual water level above a footprint to which the pump can aspirate water above the base. The maximum size of solids, such as stones, Erdbrokken and the like, which can be supported by dirty water submersible pumps along with the water through the flow path, is determined by the smallest diameter of the intake channel transverse to the flow direction. Typically, a size limit is provided at the entrance to the intake passage to prevent jamming of solids along the flow path through the pump. In clear water pumps larger particles are held by narrow inlet openings of the output channel and possibly small particles, such as. B. promoted sand.

It is known in submersible pumps to specify the residual water level variable. In the EP 1 186 782 A1 is provided for this purpose, adjust adjustable feet on a pump housing, so that the bottom of the pump can be set to at least two different heights above a base can. Another embodiment provides to attach to the outside of the pump housing a rotatable about the pump housing and sealed to this ring, by means of which a Flachabsaugung can be achieved up to a residual water level of about 1 mm. The outlet opening of the pump chamber opens into a trough, which can be filled with water for reliable initial suction. The flow path leads from the side of the housing openings via a vertical annular gap delimiting the absorbent particle size over the edge of the tub.

The present invention has for its object to provide an advantageous submersible pump with adjustable suction parameters.

The invention is described in claim 1. The dependent claims contain advantageous refinements and developments of the invention.

By the manual displacement of the adjusting relative to the pump housing to different heights above the footprint both the residual water level, up to which water can be sucked over a base, and the transverse dimension of the output channel, which limits the size of recoverable solids, are set to be variable.

Without limiting the generality is assumed below from a typical operating position of the submersible pump, in which the submersible pump with the pump housing, z. B. a bottom plate or legs of the pump housing, certain, preferably flat footing stands up on a base with horizontal orientation of the footprint. The base area then coincides for the pump operation with the footprint.

The adjusting body has a seal against the pump housing, which prevents the inflow of air into the outlet channel via a gap between the adjusting body and the pump housing. The seal is preferably provided by an inserted in an annular gap between the adjusting body and the pump housing sealing ring, which preferably bears under elastic bias to the annular gap bounding surfaces of the annular gap.

The output channel advantageously has at least over the largest part of the adjustment, preferably over the entire adjustment of the adjusting, its size of the conveyable solids limiting minimum transverse diameter in the vertical direction between a lower boundary of the adjusting, in particular a flat bottom or a preferably radially with respect to the vertical center axis outside lower edge, and a predetermined by the pump housing counter surface. The counter surface is preferably given by a bottom plate assembly of the pump housing and can also be applied to an approximately linear shape, for. B. a housing edge, be given. The counter surface can be given in another embodiment by the base on which the pump stands up with its underside in operation.

The submersible pump can be controlled in the conventional version via a water level sensor, which switches on and off depending on the height of the water level outside the pump housing, the pump. Such water level sensors are known, for example, as float switches or as capacitive or resitive electronic sensors on the pump housing and typically have a switching hysteresis. For the operation of a submersible pump controlled via such a water level sensor, preferably the smallest residual water level to be preset via the water level sensor is greater than the maximum height of the outlet channel in the latter Entry area, so that the inlet opening of the intake duct is always below the residual water level. The adjusting body then serves only for variable adjustment of a maximum size of recoverable solids. This also applies to operating modes of a submersible pump, in which this does not get up on a base, but is arranged at a distance from the base in a volume of water hanging. The setting of a certain, smaller than the maximum size of solids to be pumped by the pump of smaller diameter of the intake passage may be important, for example, if connected to the output port of the pump, a hose with a diameter which is smaller than the maximum adjustable diameter of the intake passage.

In an operation of the submersible pump without such a water level sensor, which is understood as an operation with a bridged or otherwise disabled water level sensor, the adjustment acts as a limitation of an adjustable residual water level, up to which water from the environment of the pump is conveyed through this. If the residual water level falls below the set residual water level, air enters the intake channel and disturbs the flow of water through the pump. It is advantageous for such a mode to provide in the pump per se known protection against damage to the pump by dry running.

The adjusting body is advantageously rotatable relative to the pump housing in a helical guide about a vertical axis of rotation, wherein via the helical guide rotation of the adjusting body is coupled about the axis of rotation with a vertical displacement of the adjusting relative to the axis of rotation. The helical guide can advantageously form a thread which rotates several times around the axis of rotation, so that the adjusting body can be rotated about the axis of rotation over its entire adjustment range by a plurality of revolutions.

The pump housing advantageously has a substantially circular-cylindrical neck projecting downwards from the pump chamber and surrounding an inlet opening of the pump chamber. Between this nozzle and a second radial surface of the adjusting body facing this with a small radial distance, a seal is located in a preferred embodiment, which seals the adjusting body in the course of the intake passage against the pump housing and prevents the suction of air through the annular gap. The seal is advantageously formed by an elastically deformed ring seal. The ring seal may be connected to the adjusting body and slidably abut against a sealing surface of the nozzle of the pump housing or vice versa. This also causes a frictional holding force of the adjusting body on the pump housing in the respectively adjustable position and a resistance to undesired rotation of the adjusting body during operation of the pump.

The diameter of the ring seal is advantageously not more than 2 times, in particular not more than 1.5 times the diameter of a vertical portion of the intake passage immediately in front of the pump chamber. Due to the small diameter, a manual overcoming of the friction force of the seal is advantageously ensured without excessive force and without tools. The diameter of the vertical portion of the intake passage immediately in front of the pump chamber is at least in dirty water pumps advantageously matched to the maximum adjustable diameter of the intake duct transversely to the flow direction.

For clear water pumps, the maximum adjustable diameter of the intake duct is advantageously not more than 8 mm, preferably not more than 6 mm. For dirty water pumps the maximum adjustable diameter is the intake duct advantageously at least 25 mm, in particular at least 30 mm. The intake channel advantageously has a larger diameter in the direction of flow after the adjustable diameter, so that solids which can pass through the adjustable diameter forming a bottleneck in the intake channel can also pass through the further flow path to the outlet of the pump.

The adjusting body includes in a preferred embodiment, a first portion which extends approximately circular cylindrical about the axis of rotation, and a second, upstream of the first portion lying second portion which is shaped approximately disc-shaped with a plane transverse to the axis of rotation disc plane. In particular, the second sealing surface and / or part of the helical guide can be formed on the first section. The second portion advantageously forms, with a radially outer edge region, an actuating surface on which a user can engage by hand to rotate the adjusting body relative to the pump housing. For this purpose, the edge region can be made easy to grip and in particular deviate from a completely circular line and / or have a relief structure at the top and / or bottom. The actuating surface can also be given solely by the radially outwardly facing edge of the disk-shaped second portion.

The actuating surface of the adjusting body is advantageously accessible by one or more lateral recesses in the lower region of the outer wall of the pump housing for the hand of a user. This can be given by the fact that at least one lateral recess of the pump housing is so large that a user's hand can reach through the recess through the actuating surface lying behind. Preferably, the edge region protrudes through at least one lateral recess of the pump housing out and can be operated at one lying radially out of the recess portion of the user with one hand.

Fig. 1

eine erste Seitenansicht einer Schmutzwasser-Tauchpumpe,

Fig. 2

eine zweite Seitenansicht einer Schmutzwasser-Tauchpumpe,

Fig. 3

eine Ansicht der Pumpe nach Fig. 1 von unten,

Fig. 4

eine Schnittdarstellung zu Fig. 1 mit oberer Position des Einstellkörpers,

Fig. 5

einen Ausschnitt einer Schnittdarstellung mit unterer Position des Einstellkörpers,

Fig. 6

eine zu Fig. 4 analoge Darstellung für eine Klarwasser-Tauchpumpe,

Fig. 7

den Ausschnitt nach Fig. 6 mit unterer Position des Einstellkörpers.

The invention is illustrated below with reference to preferred embodiments with reference to the figures still in detail. Showing:

Fig. 1

a first side view of a dirty water submersible pump,

Fig. 2

a second side view of a dirty water submersible pump,

Fig. 3

a view of the pump after Fig. 1 from underneath,

Fig. 4

a sectional view too Fig. 1 with upper position of the adjusting body,

Fig. 5

a detail of a sectional view with the lower position of the adjusting body,

Fig. 6

one too Fig. 4 analogue representation for a clear water submersible pump,

Fig. 7

the clipping after Fig. 6 with lower position of the adjusting body.

Fig. 1 and Fig. 2 show a submersible pump according to the invention in the execution as a dirty water pump in two different side views. Fig. 3 shows a view of the submersible pump from below with a view of the bottom plate. The pump housing is in the in Fig. 3 represented vertical view opposite flattened a circular outer contour. On opposite narrow sides of the housing, ie on the left and the right side of the Fig. 3 , a vertical output line may advantageously be arranged with an output terminal AA and a switch and sensor arrangement SA. An electrical connection cable is marked KK.

At the broad sides of the housing large-area lateral recesses GA are formed in the lower region. The housing is closed at the bottom by a bottom plate BP. In particular, it can be ensured by the bottom plate BP that a user can not inadvertently grasp the impeller of the pump rotating in a pump chamber while the pump is running from below with one finger. In the center of the bottom plate BP, however, a central opening BO is formed in order to allow water to enter through the bottom plate when the pump is set to a flat suction, as will be described in detail below. The opening BO also allows tool access to the front end of a motor shaft supporting the impeller.

In the lower part of the pump, an adjusting body is provided, which is rotatable about a vertical axis of rotation MA. In a preferred embodiment, the adjusting body has a first section which is approximately circular about the axis of rotation MA and a second section ES which terminates at the radially outward end at least approximately disc-shaped and terminates at its lower end. An outer edge of this disc-shaped second section is designated EK and can advantageously have grip structures EG, which favor an improved approach for a user's hand for manual rotation of the insert body about the axis of rotation MA. In the illustrations after Fig. 1 and Fig. 2 is the adjusting body in its uppermost position, which is based on a sectional view in the section plane IV - IV of the Fig. 2 performing Fig. 4 is explained in detail.

The bottom of the bottom plate BP has in the example sketched a rib structure with downwardly projecting, the stability of the bottom plate BP stiffening ribs RP. The plane of the lower edges of the ribs RP is spaced by a narrow vertical gap when setting up the pump on a flat base thereof, that on the bottom plate opposite the plane of the lower edges of the ribs RP still projections DV are formed which a flat footprint AE of Define underside of the pump housing and with which the pump housing PG rests on a base GF. The base area on which the pump is set up in operation is assumed to be horizontal without loss of generality. In the bottom plate, a central recess BO is provided about the axis of rotation MA, through which also the end of the motor shaft supporting the impeller is accessible.

As in particular from Fig. 2 and Fig. 3 it can be seen, the outer edge EK of the disc-shaped second portion ES of the adjusting body in vertical projection within the outer contour of the pump housing PG and is thus protected in many situations occurring during handling against shocks and damage. However, the edge portion of the disc-shaped second portion ES of the adjusting body is gripped by the lateral housing recesses GA of the pump housing for a user with one hand to manually rotate the adjusting body EK about the rotation axis MA. Preferably, an edge region of the disk-shaped second section ES of the adjusting body protrudes a grip region, for. B. the outer edge EK through the lateral housing recesses GA sections out. The border area may have separate gripping structures GG for an improved approach of a user's hand.

In the sectional view to Fig. 4 is the of the disc-shaped second portion ES as a hollow flange upwardly projecting, approximately circular cylindrical about the axis of rotation MA extending first portion EF of the adjusting recognizable. The adjusting body constructed from the first section EF and the second section ES has an opening EO about the axis of rotation MA through which water, which in particular flows through the lateral housing recesses GA, is conveyed during operation of the submersible pump. The water flowing through the opening EO of the adjusting body passes into a channel KA, which extends around the axis of rotation MA essentially circularly cylindrical and forms a passage in the pump chamber PK as a section of the suction channel. In the pumping chamber PK, an impeller PR driven by a motor MO is conventionally arranged, which drives water radially outwards by centrifugal forces and drives at a peripheral position via an outlet channel AK to the outlet port AA of the pump. The pump chamber PK forms part of the pump housing and is fixed during operation and rigidly connected thereto. The suction passage extends from an entrance area at the outer edge EK of the adjusting body between the latter and the bottom plate radially inwardly and then along the axis of rotation through the portion KA vertically upward into the pump chamber.

The adjusting body EK is connected to the pump housing via the pump chamber PK, in particular from the bottom of the pump chamber downwardly projecting nozzle PS, which surrounds the channel KA, connected in such a way that the adjusting EK with different vertical distance of the disc-shaped second section ES of the Bottom plate BP or the footprint AE or a base can be positioned.

In Fig. 4 is the adjusting body EK in the highest adjustable position and the underside of the disc-shaped second portion ES of the adjusting body has a distance FH opposite to the top of the bottom plate BP. This distance FH is advantageously smaller than the height of the lateral housing recesses GA. The distance FH is advantageously also smaller than the diameter of the Ansaugkanalabschnitts KA, so that the vertical distance FH within the flow path of water pumped by the pump represents the smallest dimension transverse to the flow direction and limits the size of the water with subsidized solids. The bottom plate can also be a separate, in conjunction with the adjusting body the distance FH as a bottleneck for the passage of solids determining structure, eg. B. have an upstanding from a bottom plate edge. Solid bodies with a larger diameter than the distance FH are already blocked on the outer edge EK of the disc-shaped second section ES and can not advance further. Solid can be promoted in a conventional manner by the pump chamber PK to the output channel AK, for which the gaps between the wings of the impeller PR are sized large enough. In particular, for a dirty water pump, the impeller PR only have two 180 ° offset from each other wings. In another, known per se implementation may be provided when using an impeller with more and more closely spaced wings that the distance of the impeller from the bottom of the pump chamber is so large that solids are swept under the impeller to the output channel. The pump can be in the Fig. 4 shown top position of the adjusting advantageously advantageously solid body up to 25 mm, preferably up to 30 mm diameter promote. The portions of the flow path through the pump which are located downstream of the inlet region of the intake channel which determines the distance FH are preferably of a small diameter Dimension greater than the maximum adjustable distance FH. Spherical solids are typically used as an objective measure of the solid state size.

The adjusting body EK is manually out of the in Fig. 4 shown top position in at least one lower position with a smaller distance of the disc-shaped second portion ES relative to the top of the bottom plate BP displaced, the displacement can preferably be done manually without tools. In Fig. 5 the lowest adjustable vertical position of the adjusting body is shown, in which the underside of the disc-shaped second portion ES of the adjusting body rests substantially directly on the top of the bottom plate BP. In this case, conveyance of water may be effected by a flow of water under the bottom plate BP to its central opening BO and, if the second section ES of the adjusting body is not sealed to the bottom plate, via a gap between the adjusting body and the bottom plate, and then through the first Section EF and connecting piece PS limited section KA of the intake duct done. As a result, water can be conveyed to the submersible pump up to a very low residual water level above the base GF. The pump works like a clear water pump in this mode. Solid bodies can typically not be swept under the bottom plate, or at most in the form of small grains, and sucked into the pump chamber PK through the opening BO.

Advantageously, the adjusting body is next to in Fig. 4 shown top vertical position and the in Fig. 5 illustrated lowest vertical position adjustable in further, lying between these two extreme positions vertical positions. Preferably, a continuous or at least approximately continuous adjustment of vertical intermediate positions between the two extreme positions is possible. There may be markings on the case be provided, which is in the value as a measure of the currently set distance FH, which limits the size of the eligible solids at the selected setting, readable. For example, it may be useful when connecting a hose with respect to the output terminal AA of the pump smaller inner tube diameter, from the outset to adjust the adjustment to a smaller distance FHmax compared to the smaller distance FHaktuell to still solid of z. B. to aspirate up to 15 mm diameter, but at the same time to avoid clogging of the hose by larger solids. The said housing markings can then also be related to the tube diameter, which is typically regarded in terms of the inch measure. In Fig. 4 is a situation with a attached to the output terminal AA of the pump, away leading hose SC indicated with reduced cross-section. For such a situation, adjustment of a vertical intermediate position of the adjusting body may be of particular advantage.

Advantageously, the adjusting body is connected to the pump housing via a helical guide, preferably a threaded connection GV surrounding the axis of rotation MA. Rotation of the adjusting body about the axis of rotation MA relative to the pump housing is then automatically coupled to vertical displacement of the adjusting body relative to the pump housing.

In the example shown, a threaded connection is formed by an external thread GP on the nozzle PS protruding downwards from the pump chamber PK and defining the channel KA. As a counter thread, which is in threaded engagement with the external thread GP, an internal thread is formed on the inner wall of the approximately circular-cylindrical, flange-shaped first section EF of the adjusting body. Depending on the direction of rotation of the adjusting body with manual action of a user's hand, the adjusting body displaced upwardly or downwardly relative to the pump housing, whereby in each case the distance FH of the underside of the disc-shaped second portion of the adjusting body to the base plate BP changes. As a result of this change, the maximum size of solids which can be conveyed by the pump at the respectively set height of the setting body can first be predetermined. On the other hand, at the same time on the setting of the vertical position of the setting of the residual water level, up to which the pump can still promote water from the environment of the pump, changeable specifiable.

Since the threaded connection is usually not hermetically sealed in itself and a suction of air through the threaded connection would interfere with the promotion of water or interrupt the connection between the adjusting body and the pump housing is still sealed by a seal substantially airtight transversely to the flow direction of the water. For this purpose, in the example outlined, a further, from the bottom of the pump chamber PK downwardly projecting hollow nozzle DS is provided, the circular cylindrical inner wall forms a sealing surface DF, on which a guided with the first portion EF of the adjusting body ring seal DM slidably rests. The hollow nozzle DS is attached in the example sketched over several screws to the underside of the pump chamber PK and sealed against them via another seal DP. The inner sealing surface DF of the nozzle DS forms with the seal DM over the entire vertical adjustment of the adjusting an airtight seal between the first section EF of the adjusting and the nozzle DS or the pump housing.

A connection between the adjusting body and the pump housing with vertical adjustability and sealing of the adjusting body against the pump housing is also conceivable in other ways. In particular, the threaded connection by an internal thread on the other nozzle DS and an external thread on the flange-shaped first section EF of the adjusting body with a seal between the inner wall of the first section EF of the adjusting and outer wall of the nozzle PS or by further rearrangements of Au-βengewinde, internal thread, cylindrical sealing surfaces and nozzles given be. The threaded connection can also be located radially outside the sealing surface. When the threaded connection and one of the threads can be interrupted in the circumferential direction.

The seal between adjusting body and pump housing effecting, sliding along a sealing surface sliding seal DM causes at the same time by friction on the sealing surface a frictional locking of the setting in the manually adjusted position. Advantageously, the radius of the sliding surface on which the seal slides, is not more than 2 times, preferably not more than 1.5 times the diameter of the channel portion KA. As a result, on the one hand, the connection between the adjusting body and the pump housing advantageously compact, on the other hand, the frictional force of the seal DM on the sealing surface by the action of a user force on the edge region of the disc-shaped second portion of the adjusting body without much effort can be overcome, for which it is also advantageous that the grip area , on which the user's hand acts on the adjusting body in a rotationally rotating manner, is located radially outward in the edge region of the second section ES.

The principle of Höhenverlagerbarkeit a setting relative to the pump housing is also applicable to a submersible designed from the outset only as a clear water pump. In Fig. 6 and Fig. 7 For this purpose each sectional views of the lower portion of such a submersible pump are outlined, wherein Fig. 6 the upper position of a relative to the pump housing vertically displaceable adjusting body and Fig. 7 show the lowest position of the adjusting body.

In the previous example to Fig. 1 to Fig. 5 analogous manner is in the example Fig. 6 and Fig. 7 in a pump chamber PKL, which forms part of the pump housing PGL and is rigidly connected thereto, an impeller PRL arranged. The axis of rotation of the impeller is in turn preferably arranged in alignment with the axis of rotation MA of a relative to the pump housing about the vertical axis of rotation MA rotatable adjusting body. The adjusting body in turn comprises a flange-shaped first section EFL surrounding the axis of rotation MA approximately circularly, and an approximately disc-shaped second section ESL extending radially outwardly from its lower edge. A downwardly projecting from the pump chamber nozzle PSL surrounds the upstream of the pump chamber lying channel section KAL and has on its outer side an external thread GPL, with which an internal thread GEL of the first section EFL is engaged. A further nozzle DSL radially surrounding and forming a gap with respect to this further nozzle DSL is integrally formed in this example to the bottom of the pump chamber and has a sealing surface DFL as a cylindrical inner wall. A ring seal DM, which is moved with the first section EFL of the adjusting body, bears under elastic prestress against the sealing surface DFL of the further section DSL and seals the suction channel lying upstream of the pump chamber substantially airtight transversely to the flow direction of the water.

In the in Fig. 6 shown top vertical position of the adjusting body is the underside of the disc-shaped second section ESL of the adjusting body with a distance FS above the bottom plate BPL. The vertical distance FS is smaller than the height of the lateral housing recesses GAL, so that both the maximum size of solids that can be conveyed and the residual water level to which the pump can aspirate are determined by the height of the underside of the second section ESL of the setting body. The distance FS is advantageously at a clear water submersible pump maximum 8 mm, in particular at most 6 mm.

By turning the adjusting body about the rotation axis MA, the underside of the second portion ESL of the adjusting body can be lowered again to the top of the bottom plate BPL. In this lowermost position of the adjusting body, in turn, water can flow under the bottom plate BPL and be sucked out in this way. If the underside of the second section ESL of the adjusting body abuts sufficiently sealingly on the upper side of the base plate BPL, so that no air is drawn in between these two surfaces, the residual water level can be reduced to an extremely low level above the base area GF. On the underside of the bottom plate flow paths of low height can be formed, which then determine this very low residual water level. In particular, protrusions DVL which project downwards beyond a lower boundary plane of the base plate and which define a mounting surface of the underside of the pump housing can in turn be provided.

In the example outlined Fig. 6 and Fig. 7 is formed in the bottom plate BPL a larger central recess BF. A security against intervention of a user's hand in the rotating impeller in the pump chamber is then given by the fact that the adjusting body does not have a large-area opening in its central region surrounding the rotation axis MA, but a plurality of smaller openings, for example via webs, forming a grid EG is provided , The grid openings are at least as large in diameter as the distance FL, so that in turn blocking larger, non-recoverable solid already done at the outer edge of the second section ESL of the setting.

The execution as pure clear water pump after kind of Fig. 6 and Fig. 7 is advantageous in that the vertical distance of the impeller over the formed by the bottom of the bottom plate and the projections DVL mounting surface is less than in the embodiment according to Fig. 4, Fig. 5 , At below the pump chamber lying initial water level around the pump and still air-filled pump chamber therefore only a lower negative pressure must be generated by the impeller when switching on the pump than at a low water level emptying dirty water pump 4 and FIG. 5 , Impeller and engine power can be matched to these other requirements in the pure clear water pump in their dimensions.

In the figures, the water flow through the pump is indicated by a broken line and indicated upstream of the pump chamber by WI, downstream of the pump chamber by WA. The switch and sensor arrangement SA can advantageously be provided for controlling the pump as a function of the water level in the vicinity of the pump. The vertical adjustability of the adjusting body serves in this case if the lowest water level which can be evaluated by the switch and sensor arrangement SA is above the maximum height of the underside of the second section of the adjusting body, only for adjusting the particle size to be conveyed. The switch and sensor arrangement is advantageously displaceable in a switching state or bridged or otherwise deactivated, so that the pump runs independently of a level sensor in the switch and sensor assembly SA even at a lower water level to the pump. In this mode, the adjustability of the vertical position of the adjusting body also serves to define a residual water level around the pump, up to which the pump can pump water from the environment of the pump housing to the outlet port AA. In particular, a very low residual water level can be adjustable for flat extraction in this mode.

The features indicated above and in the claims, as well as the features which can be seen in the figures, can be implemented advantageously both individually and in various combinations. The invention is not limited to the exemplary embodiments described, but can be modified in many ways within the scope of expert knowledge.

Claims (14)

Submersible pump with a pump housing (PG), which determines a footprint (AE) of the submersible pump and in a pump chamber (PK) includes a motor-driven conveying element (PR) for conveying water from the inlet to the outlet of a flow path through the pump, wherein in the flow path upstream of the conveying element (PR) lying, transversely sealed to the flow direction output channel is at least partially limited by an adjustment (EF, ES), which manually displaceable relative to the pump housing (PG) and thereby to several positions with different heights (FH) above the footprint ( AE) is adjustable. Submersible pump according to claim 1, characterized in that the adjusting body (EF, ES) about a vertical axis of rotation (MA) in a helical guide relative to the pump housing (PG) is rotatable and rotation via the helical guide with an adjustment of the height of the (FK) Adjusting body (EF, ES) is coupled above the footprint (AE). Submersible pump according to claim 2, characterized in that the helical guide forms a multiple times around the axis of rotation threaded connection (GP, GE). Submersible pump according to one of claims 1 to 3, characterized in that radially between the adjusting body (EF) and the pump housing (DS), a seal (DM) is arranged. Submersible pump according to claim 4, characterized in that the diameter of the seal (DM) with respect to the axis of rotation (MA) a maximum of 2 times, in particular, is at most 1.5 times the diameter of a section (KA) of the intake duct before entering the pump chamber (PK). Submersible pump according to one of claims 1 to 5, characterized in that the adjusting body (EF, ES) within an adjustment range to a maximum height and a minimum height above the footprint (AE) is adjustable. Submersible pump according to claim 6, characterized in that the adjusting body (EF, ES) is adjustable to at least an intermediate height between the maximum and the minimum height. Submersible pump according to claim 6 or 7, characterized in that over at least the largest part of the adjustment range, the minimum transverse dimension of the output channel by the adjustment of the setting body (EF, ES) is determined. Submersible pump according to claim 8, characterized in that the respective minimum transverse dimension is formed by the distance (FH) of the adjusting body (EF, ES) from a substantially in the plane of the footprint (AE) located housing portion (BP). Submersible pump according to one of claims 6 to 9, characterized in that the adjusting body (EF, ES) over at least the largest part of the adjustment determines the maximum suction height above the footprint (AE). Submersible pump according to one of claims 1 to 10, characterized in that the adjusting body has an at least approximately circular cylindrical around the Turning axis (MA) extending first portion (EF) and an upstream of this arranged, approximately disc-shaped second section (ES) comprises. Submersible pump according to claim 11, characterized in that the second section (ES) with a radially outer region (EK) forms an actuating element for manual displacement of the adjusting body. Submersible pump according to claim 12, characterized in that the actuating element can be reached by at least one lateral housing recess (GA) of the pump housing (PG) for a user. Submersible pump according to claim 13, characterized in that the actuating element (EK) extends in sections through at least one lateral housing recess (GA) to the outside.

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