PUMP-FLOAT

“No water and no amplitude, and no syudy…” This catch phrase from the pre-war Comedy “Volga-Volga” is very close and understandable to everyone who is associated with the earth, and the cottagers, and rural residents. Well, if the water system is missing or not working, and the summers are hot and dry, the problem of providing water is becoming a serious. Rescue — pump.

For supplying water from a well, a nearby pond or storage tanks the most widely produced by the domestic industry submersible vibratory pumps. They are affordable, compact and quite economical. But their quality and reliability leave much to be desired. The fact that their design includes two windings of enameled wire. Prior to Assembly the winding is impregnated with the compound by dipping method. This technology is quite primitive, not giving guarantees of quality and reliability. (For reference. In the production of vital goods all the windings of transformers, stators and rotors of electric motors, etc. are long-term and more serious treatment. They are placed in a strong sealed container, approximately half-filled epoxy
varnish, the pressure was reduced to 1 MPa and after aging is increased to 50 to 60 MPa. The cycle is repeated three times, followed by drying in an oven at a controlled temperature).

As a result of incomplete impregnation, which is caused by simple dipping in the compound remain in the windings of the air cavity. Under the action of vibrations, deformation of the wire, the enamel begins to break down and, as a consequence, there is inter-turn short circuit, local heating and… pump “dies.” All these “charms” I experienced repeatedly during 18 years of operation, household vibration pumps. The new pump without incident worked at best for three years, and after repair, and even less — a year or two.

Fig. 1. Pump-float:

1 — discharge hose; 2 — Gusak: 3 — centrifugal motor-pump BC of 1.1-18-1.1; 4 — body; 5 — float (camera Cassa of the car); 6 — nylon rope; 7 — gasket (rubber washer); 8 — washer (steel sheet. lang); 9 nut 1 1/4″ pipes.; 10— suction nozzle (part of the sleeves 1 1/4″ pipes.); 11 – filter

Fig. 2. Body:

1 — strengthening (brass or steel washer); 2 extraction; 3 — pole (3 pieces), 4 rib (6 pieces): material det. 2, 3 and 4 — galvanized sheet s0,8 — 1

Fig. 3. Filter:

1 — nut, pipe 1 1/4″; 2 – cover; 3 — (8 PCs); 4 — grid with a cell no more than 1×1 mm (brass, stainless steel); 5 — base material det. 2, 3; 5 — galvanized sheet s0.8 — 1.

Fig. 4. Gander:

1 — fitting (part of the spigot pipe 1 1/4″); 2,3,5,6 knee (gazotoplivnoy pipe 1/2″); 4 — washer (steel sheet s3 — 4)

Photo 2. The constituent elements of the pumping unit:

1 — gasket; 2 — washer; 3 — body; 4 — filter; 5 — float; 6 — discharge (first version); 7 — suction nozzle

And when you consider the absence of the pump input filter, and as a consequence — the exclusion of the possibility to pump water to the bottom, it will be clear why I eventually had to abandon fibromatoses.

As a result of long creative search I made mobile pumping unit, which consists of asynchronous elektrodvigatel with built-in capacitors for connection to single-phase network and centrifugal pump BC 1.1 to 18-U1,1 with closed impeller, made as a single design. Pump head — 18 m water column, capacity — 1.1 litres per second, power consumption—720 W, voltage — 220 V, weight of 13.5 kg.

The motor pump unit is air cooled, so even in case of failure to trip (after pumping water from the tank) overheating does not occur and long operation of the engine at idle doesn’t affect the resource.

The pump BC of 1.1-18-1.1 non-immersion, non-self-priming. Therefore, in order to adapt it to the selection of water from the reservoir, I put it in the case — Trichoderma the extraction, the upper edge of which strapped the car camera from the car as a float. Through the hole in the bottom of the casing suction nozzle of the pump output, set the rubber gasket and secured by a nut with pipe cylindrical thread 1 1/4″ (this thread is due to the pump design). When selecting water from a well or natural reservoir on the protruding end of the nozzle is screwed on homemade filter.

During pumping out of the reservoir filter is not needed, and the pump is connected with a hose. So it does not bend in the suction pipe using a rubber coupling-adapter with tightness is inserted into a bent tube (see photo 2, Fig.1, not shown). As the water-level drawdown pumping unit will sink. That it is not “the village” on the bottom of the tank, the casing has three support legs.

The pressure channel of the pump opens onto its lateral surface. To connect the hose initially I set corner fitting (see photo 2), but, as it turned out, had to fix it on the hose without removing the pump from the housing, it was quite difficult. Therefore, subsequently, the fitting I replaced the curved pipe beyond the upper edge of the housing (Fig. 1,4).

In the manufacture of. the greatest difficulties were caused by the fitting of the gander, as for tapping the pipe thread 1 1/4″ it took a special rarely used in everyday life die or lathe and skilled performer. Cutting blanks for the gander and the weld was made using a special fairly simple miter box and conductors, designed and manufactured by me and described in detail in the journal “modelist-Konstruktor”.

The filter, as mentioned above, homemade. For its production took cuts galvanized sheet with a thickness of 0.8 — 1 mm, the grid cell is not more than 1×1 mm brass or stainless steel nut with pipe thread 1 1/4″. The connection of all filter elements in a single unit was made by soldering solder POS 40.

V. LUCHENKO, p. 3 and p in a n-s, Ukraine