DE7408231U - Dirty water pump with cooling water bell - Google Patents

Description

Cooling water bell and a preferably explosive

Protection electric motor, which is cooled by the pumped and filled conveying liquid, whereby the cooling liquid branched off on the pressure side is returned to the suction line or the like The waste water pump is located above the water level of the za promoting Mediam.

Such wastewater pumps are known, but have still several disadvantages. In particular, they run the risk of imperfect cooling. It has shown,

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that the KÜhlwasser-Glooke empties when the pump is at a standstill. The water or the like conveying liquid then flowing into the cooling water bell when the Fsope is started up is often not able to fill the KÜhlwasser-Glooke in this way or to close it so smoothly for various reasons rinse around »as would be desirable for safe cooling. In particular, »if you use the coolant from below the cooling water bell feeds »that in dJbser a. Air cushion forms »that a complete cooling with special needs. If, on the other hand, the cooling water or the like is fed to the cooling water bell from above and it is allowed to run off in its lower area, there is also the danger that An air cushion builds up in niches or other upper areas of the cooling water bell.

In addition, experiments have shown that when the Cooling water in the upper area of the cooling water bell creates the following disadvantages: Unruly things in the cooling medium can settle in the onfeevem Bsre & elst «tea Köfcisiaseear-fflLoeäee, since this area is not or is completely flushed through. For the same reason, there is also an unfavorable heat dissipation.

therefore ordered the task »a SciaaBtasiasserpurape the

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To create the type mentioned at the beginning, in which the aforementioned disadvantages are avoided. In particular, rope can be achieved with little effort »that after standstill and restart of the dirty water pump the The cooling water bell is reliably filled and through the running cooling water flow is cooled as evenly and effectively as possible »at the same time a certain Flushing and self-cleaning of the cooling water bell is errdoht.

The new principle of the LSsune consists in the fact that in a dirty water pump of the type mentioned at the beginning the inlet of the branched cooling water flow is provided in the upper area of the cooling water bell.

Further developments of the innovation can be found in the subclaims. Next is the innovation with lh * Ren essential details of the invention with reference to the drawing explain * and described. The drawing shows one designated as a whole by 1 Dirty water pump in a vertical longitudinal section. These

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vielst as the drive a preferably explosion-proof electric motor 2 which is cooled in still to be described way, with the help of pumped liquid * Both the electric motor £ and the actual pump part 3 are disposed above the water level of the liquid F.

Around a jacket 4 of the electric motor "2 is located concentrically and at a distance an outer jacket 5 'forms together with the flanges 6 of the motor housing jacket 4 this outer jacket 5 is designated as a whole by 7 cooling water bell. It is part of the innovation that this has an inlet for the cooling water in its upper area δ. A cooling water supply line 9 leads namely from Pressure connection 10 to the inlet E, whereby this feed line 9 according to a preferred embodiment consists of a uirohslchtigen Material, namely made of plastic pipe. This gives the additional advantage of being able to use the feed the cooling water flow can be observed. Is branched off this supply pipe 9 on a filter core 11 "of the one Has flow-through filter 12. The filter attachment 11 is located on or in the pressure port 10. The flow-through filter 11 is from the main flow of the pumping liquid (compare Pf 1} in a known way automatically cleaned

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nigt, so that there is the advantage that it is proportionate clean cooling water of the cooling water bell 7 flows. The degree of purity can also vary because of the transparency the supply line 9 can also be checked well.

It is also part of the innovation that on the cooling water bell 7 in its upper area 8 an overflow U and in its lower area A a drain 15 is provided, the an adjustable valve, preferably an adjustable manual valve 16. According to a further feature of the invention is the overflow pipe 17 and the drain pipe 18 combined into a pipe 19, which is in the area of the intake 20 of the actual pump part 3 is returned. Thereafter, according to a development of the invention also the overflow and drainage pipes 17 and 18 at least partially made of transparent material, preferably completely Made of plastic tubing, so that the flow of cooling water, possibly also removing it of air bubbles etc. from the cooling water bell 7 can be observed.

When setting up the dirty water pump, especially when adjusting the manual valve serving as a throttle point l6 you proceed as follows:

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For example, the manual valve 16 is first opened completely and the pump 1 is started up in such a way that the Feed line 9 the cooling water bell 7 is a branched off partial flow of the conveying medium, here also for short "cooling water" "called, received through the inlet S. This cooling water can then through the outlet 15 in the lower area A expire. Then the manual valve is closed so far that there is a throttle point in the drain pipe 18 in such a way that that the cooling water bell gradually fills, but a certain part of the incoming cooling water continues flows through the drain pipe 18. The air present at the top of the cooling water bell 7 can then pass through the Overflow pipe 17 escape. If necessary, the innovation also provides a suction effect in the pipe 19, where the liquid coming from the drain pipe IS in the A type of suction flow acts on the overflow line 17 can. In any case, however, the air can escape through this overflow pipe 17 and when the cooling water bell-ke 7 has filled to the top with water, that portion of the flowing in through the supply line 9 can there Drain the cooling water via the overflow line, the does not flow through the drain 15. After an advantageous Further development of the innovation, the manual valve 16 will be set and with an adjustment mark,

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Adjustment lock or the like. Provided that about 80 % of the amount of cooling liquid entering at the inlet E leaves the bell 7 via the drain pipe 18, while the remainder flows off via the overflow pipe 17. Manual valves 16 with corresponding adjustment options, including stops for a corresponding definition of a point that has been adjusted once with regard to the flow rate, are known per se.

One achieves with such a dirty water pump 1 that there is both a good, even flow of cooling water in the cooling water bell, in particular this bell 7 is also well flushed through the drain in the lower region of this bell. A deposit of contaminants is largely avoided. On the other hand, no air cushions can form, rather the air can escape through the overflow Ü if necessary. A particular advantage of the innovation is that the dirty water pump and the electric motor can be located above the water level of the medium to be conveyed. In particular, such a pump or its suction inlet can be a considerable distance above this water level and / or in one of the conveyed medium

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accommodate separated area. For example, the dirty water pump can be housed in a support member or the like that is accessible «so that the dirty water pump, but at least the electric motor is easily accessible, despite such an elevated position of the dirty water pump or the electric motor, its cooling is properly guaranteed by the innovation according to the arrangement. Accordingly, the dirty water pump 1 with a special, extended (in the drawing

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not shown in detail) intake manifold or the like. Be provided or cooperate with it.

All of the features described above can be used individually and in any Combination with one another is essential to the invention be.

- Protection claims -

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Claims (3)

i. H. SCHMITT !, ι * * .. * J: dbsikOjugsth. is. W. MAUCHER MW «> x. (0781) 70773 Lederle KG 78 Freiburg i. Br. Guntramstraße 11 File S 73 467 S / hu S_c_h_uJ; _z_a_n_sjD_r_ü_c_h_e 1. Dirty water pump with a cooling water bell and a preferably explosion-proof electric motor, which is powered by the pumped and filtered conveying liquid is cooled * with the cooling liquid branched off on the pressure side via the cooling water bell is fed back into the intake port od. In the like. Low pressure area of the pump and furthermore the electric motor and preferably the dirty water pump above the water level of the pumped Medium, are characterized that the inlet (E) of the branched off cooling water flow in the upper area (8) of the cooling water bell (7) is provided, this above (8) an overflow (U) and in its lower area (A) a single - Has adjustable (throttable) drain (15). / 2 ItLJt • · «Μ 2. dirty water pump according to claim 1, characterized in that the supply line, overflow - and / or Drain pipes (9 * 17 * 18) made of transparent material, preferably made of plastic pipe. 3. dirty water pump according to claim 1 or 2, characterized marked at their drainage site a known flow-through filter (i2) is provided for the cooling water or the like. H. Dirty water pump according to one or more of Claims L bi & 3 «, characterized in that a throttled manual valve (16) or similar regulating element is provided in the drain pipe (18), in which preferably a regulated throttle cross-section can be fixed and / or provided with a marking. 5 · dirty water pump according to one or more of the claims 1 to 5, characterized in that it has an elongated intake connection or the like (20). (H. Schmitt) patent attorney