DE7233814U - Electric water pump for caravans - Google Patents

Description

Patent attorney Dipl.-Ing.

Werner Gramm

Helmut B arwig 33 ^{Braunschweig,} 13-9.1972

^ S ?? Ka-rlshafen / Weser Theodor-Heuss-Strasse 1

Ζ2 £ Ξ. - Phone: 0531-80079

Am WaI '' arsb erg

"Electric water pump lawyer file 1585 Gm ·, 3353

for caravans "

The invention "relates to an electric water pump for caravans, Boats or the like with a pressure chamber which has a connection for a pressure line.

Known pumps of this type are only available with a single connection equipped for a pressure line. If two draw-off points are to be supplied with water, the pressure line must be used a branch piece can be installed. In addition, every tap must be provided with their own stopcock. To operate the tap, the stopcock must first be opened and then the pump motor is switched on.

This handling is not only cumbersome, but also not absolutely reliable, since there is always the risk that a

The shut-off valve is not closed.

The invention is based on the object of developing a pump of the type described above which is easy to use can supply at least two taps.

This object is achieved according to the invention in that at least two offset against each other on the circumference of the pressure chamber arranged connections for one pressure line each protrude into the pressure space, which encloses at least one switchover flap, which releases a connection under the influence of the water flow and / or the friction of the motor shaft in its one end position and in its other end position seals the connection, and that a reversing device for the pump motor, preferably a three-pole switch is provided.

The pump is expediently a centrifugal pump designed as a submersible pump with a pressure chamber that is round in cross section, wherein the switchover flap is preferably mounted centrically in the pressure chamber is.

The switchover flap can have two control vanes rigidly connected to one another, the vane surfaces of which are approximately parallel stand to the motor shaft. The two control wings can simultaneously form the locking element for the connections, or else each wear a locking device for the associated connection.

An exemplary embodiment of the invention is shown in the drawing. Show it:

FIG. 1 shows a central longitudinal section through a centrifugal pump designed as a submersible pump, and FIG

FIG. 2 shows a cross section along the line AA in FIG. 1.

The water pump shown has a pressure chamber 1 in which is arranged offset from one another on the circumference from above two connections 2 protrude, the inflow opening 3 of which is arranged laterally. Centered in the one with a round cross-section The shaft 4 of a motor 5> protrudes from the pressure chamber 1 which carries the impeller 6 at its free end. The pressure space 1 is closed off at the bottom via a base plate 7, ie a suction opening 8 having. On the motor shaft 4 is easily pivotable Reversing flap 9 mounted, the two rigidly connected to one another Has control vane 10, the vane surfaces of which are approximately parallel to the motor shaft 4. This control wing 10 form at the same time the closing element for the inflow opening 3 of each associated connection 2. In particular, FIG. 2 shows that the two connections 2 are not exactly opposite one another, so that the switching flap 9 only ever one Inflow opening 3 of a connection 2 closes off.

Depending on the direction of rotation of the motor 5 and thus the water flow developing in the pressure chamber 1, the primary switching valve is positioned 9 with their control vanes 10 against the inflow opening 5

of one or the other port 2. So it will be from the start always only one of the "two pressure lines with water" applied. This leads to the great advantage that no separate stop cocks are required for the "two possible tapping points" are. In addition, the ease of use is significantly higher, since only the pump motor 5 has to be switched on "needs taking into account the rotation required in each case; This means that only a single switch "has to be operated at the respective tap. Since there is always one of the" two connections 2 is completed by the switching flap 9 can never Uncontrolled and undesirable water from a tap pour out.

The new pump is particularly suitable for caravans where the two taps "can be arranged for example in the kitchen and the toilet.

List of reference symbols

1 Printing room 2 connections 3 Egg flow rate 4- wave VJl engine 6th Impeller 7th Base plate 8th Suction opening 9 Changeover flap 10 Control wing

Claims (1)

Protection claims 1. Electric water pump for caravans, boats or the like with a pressure chamber which has a connection for a pressure line, characterized in that that at least two on the circumference of the pressure chamber (1) offset against each other arranged connections (2) for each a pressure line project into the pressure space (1), which encloses at least one switchover flap (9) which, under the influence of the water flow and / or the friction of the motor shaft (4) in its one end position releases a connection (2) and in its other end position seals the connection (2), and that a reversing device, preferably a three-pole switch, is provided for the pump motor (5) is. 2. Pump according to claim 1, characterized by a centrifugal pump designed as a submersible pump with a in cross-section round pressure chamber (1). 5. Pump according to claim 2, characterized in that the switchover flap (9) is centrically in the Pressure chamber (1) is stored. 4. Pump according to claim 3 < characterized in that the switchover flap (9) has two rigidly interconnected control vanes (10), the The wing surfaces are approximately parallel to the motor shaft (<'+). 5 · Pump according to claim 4, characterized calibrates that the "two control vanes (10) at the same time form the locking element for the connections (2)". 6. Pump according to claim 3> characterized in that that each control wing (10) carries a locking element for the associated connection (2). . Werner Gramm
Patent attorney
Gr / Gr.