NL8102221A - Self-priming centrifugal pump - has suction pipe extending upwards from pump and then downwards to liquid level - Google Patents

Abstract

The self-priming centrifugal pump delivers liquid to a higher level, having suction and discharge pipes. Both the suction (6) and the discharge (7) pipes extend upwards where they are connected to the pump (1), while above the level of the latter the suction pipe is bent downwards. Between this bend and the pump, the volume of the suction pipe is greater than that between its highest point and the level of the liquid to be drawn in. Its portion between the pump and the highest point can be widened (3) to form a reservoir with coaxial inlet and outlet. The reservoir is mounted vertically, and funnel-shaped at top and bottom.

Description

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Self-priming centrifugal pump »

The invention relates to a device τοστ pumping a liquid to a higher level, provided with a normal centrifugal pump for displacing liquids, such as, inter alia, being used as a drain pump in washing machines. DLT 5 types of pumps are also used for fountains , waterfalls and ponds - for sprinkling purposes - as so-called basement pumps and the like »

The centrifugal pumps referred to are known to have a favorable water displacement at a proportionately low energy consumption and to be not susceptible to failure. They are furthermore manufactured in large series for various applications in various capacities, so that the praises b $ without being low *

However, this type of pumps is not simply "self-priming" «They must be adjusted for proper operation either below the liquid level, with an unobstructed liquid supply such as bg washing machines and dishwashers. They are also used as" under water pump ". for fountains in ponds and as so-called basement pumps, where the electric motor of the pump unit is watertight and a high-quality electrical insulation has been applied »20 On the other hand, an" above water "arrangement, these pumps must be fitted with a suction pipe with a so-called foot valve below the liquid level. give the pump the opportunity to "draw in" the liquid at the start »

The invention provides an easy-to-install device 25 for operating a normal centrifugal pump in arrangement above the level. of the liquid to be sucked, is self-priming »For this purpose, both the supply and discharge pipes of the pump point upwards with respect to this, with a suction reservoir arranged in the supply pipe above the pump. Volume of this suction reservoir -30 voir according to the invention is greater than the volume of the total supply pipe, and. in such a way that before all liquid is pumped out of this suction chamber, there is sufficient underpressure to allow the difference in height, between the pump and the liquid displaced, to be overcome by atmospheric pressure. This in effect makes the "liquid level" above the level. from the pump, and is. a constant flow requirement guaranteed »8102221 · 2 -

Entertainment provides the invention with a device for use as a cellar pump. in the discharge pipe connecting to the pump, courts Eat highest level of Eat. suction reservoir a backflow reagent reservoir is fitted of a volume corresponding to the EAT 5 suction reservoir, with which this hjg is automatically pumped out completely of the suction fluid to be sucked, when the pump is switched off »

Finally, the invention provides a number of embodiments in which the outflowing water from the device is utilized for IQ as well as for air contamination and air purification.

The invention is explained in more detail with the aid of the figures, wherein features and advantages of the invention emerge treatment of particularly favorable embodiments »

Figure 1 shows a schematic embodiment of the device according to the invention, in which the centrifugal pump C1) is provided with the upwardly directed inlet pipe (2) and the arc-directed discharge pipe (7). In the supply pipe (2) is above the centrifuge - bale pump (1), the suction reservoir O), which, with the upwardly directed discharge pipe C?), Forms a system of communicating vessels by means of the centrifugal pump (1) »The downwardly directed suction pipe (üng (6) is located with the end of this under the surface of the fluid to be moved »The suction reservoir (3) is of sufficient strength constructively to be able to withstand the atmospheric pressure relative to the internal underpressure» 25 Cylindrical suction reservoir set (3), is centrally fitted with the inlet and outlet spout (4), which are extended in each other's extension. The spouts (if) extend conically to the cylinder wall of the suction reservoir (3) at an angle of k5 ° ~

The suction reservoir according to the invention is further of such a construction that it can be fitted without problems in the normal suction line without any extras. To this end, the suction reservoir * voir (3) * bf. preferably consisting * of a cylindrical plastic housing fitted centrally at both ends, with spouts where the suction hose can easily be slid over »These spouts must be extended in 35 rows»

At least on the z $ de facing the pump, the nozzle runs to the cylinder wall of the suction reservoir in a conical shape (5) with an angle of 45 ° * BS. This arrangement removes the inlet in the suction reservoir (3) from the suction pipe (6) draw in air during the 81 02 22 1 5 '>% ~ 3 - by entraining the water flowing into the reservoir and by the water drawn in 1 * ELoor Is both the suction pipe (6) and the reservoir (3 ), after a very short time completely filled with water, resulting in a maximum yield of the device »5 If the pump were to be used, for example, as a cellar pump, if the liquid had been pumped out to £, the suction reservoir would also be pumped out empty» again, putting the device into operation would first have to fill the suction reservoir again ».

Figure 2 schematically shows an embodiment according to the invention in which the backflow reservoir (8) is arranged in the feed (7), above the highest level of the suction reservoir (3) * Bit backflow reservoir <8) has a volume corresponding to that of the suction reservoir (3), with which this b # shutdown 15 of the pump is automatically filled »

The invention further provides embodiments in which the outflowing water from the device is used for both air humidification and air purification.

Figure 3 schematically shows an embodiment according to the invention, in which the water supplied by the pump is supplied for this purpose to an outflow member (9) with a spigot-shaped opening (10), with which both a large water surface and a high flow rate is obtained »

Figure k schematically represents an embodiment: according to the invention for applications in living, living and living space, where the outflow opening is annular both for reasons of efficiency, operating coafort, and of spatial dimensions. water from. the pump (l), raised via a tubular body (11) and between the end of this housing (11) and a cover-shaped member (12), which is centrally above the end of the tubular body (11) applied, practically evenly squeezed and deflected in all directions *

When the distance between the lid-shaped member (12) and the top end of the tubular body (11) is adjustable, for example, through the lid-shaped member to make a screw thread movable, both the surface and the velocity of the outflowing water be set »

This produces the same effect as bg “hard” water jets in a shower room and in the vicinity of large waterfalls »8102221

Claims (1)

Ok ν gambling gouges · I ^ Device for pumping to a higher level, a liquid, provided with a centrifugal pump, a supply and a drain pipe, characterized in that »that both» the supply and discharge pipes are connected to The pump is oriented upwards with respect to this, the supply port and the level of the pump is bent downwards and the supply line between the pump and the deflection has a capacity greater than the volume of the suction line between the upper point thereof and the level of the liquid to be drawn in »10 2 •. Device according to claim 1», characterized in that the supply pipe pointing upwards with respect to the pump has a widening or reservoir in connection with the pump, the cross-section of which is larger than the outlet and inlet and outlet are co-axial, the axis is directed substantially vertically, and the top and bottom of the reservoir are funnel-shaped * 3. Device according to claim 1 and 2, characterized in that note »that the discharge pipe pointing upwards with respect to the pump has a widening or reservoir, connected to the pump, of which. da cross section is larger than the outlet and located above the highest level of the flare or the reservoir in the suction pipe. Device according to any one of claims 1 to 5, as well as pump device, characterized in that: the water supplied by the pump is supplied to. a spigot-shaped outlet · 5 * Device according to claim 4 », characterized in that the gap 25 is annular · ^ • Device according to claim b and 5«, characterized in that the gap width is adjustable · 8102221