FI82755C - Pump - Google Patents

Description

82755

PUMP

The invention relates, for example, to a liquid substance transfer pump for removing drainage water from a basement, emptying and filling large or small basins, emptying a well, emptying building ditches, and in particular draining ditches from lowlands.

Fields on lowlands can often be covered with a lot of water. Drainage or drainage does not dry these areas sufficiently for beneficial use, and in addition, water needs to be pumped out of these areas. The pump according to the invention is very suitable for pumping large amounts of water away from lowlands.

The possibilities of using existing drainage pumps, ie submersible pumps, are limited because they are complex in structure and contain many parts. The price of pumps is high.

The pump according to the invention provides a decisive improvement in the above-mentioned drawbacks. To achieve this, the pump according to the invention is characterized by what is stated in the characterizing part of claim 1.

The main advantage of the invention can be considered its cheapness. In a non-horizontal, i.e. preferred, position, the bearing at the lower end of the pump shaft remains below the surface of the water because it is below the propeller. This prevents the bearing from heating up even when the pump is empty. The pump has very few maintenance items and all parts are easy to access.

In the following, the invention is explained in detail in the following ····; with reference to the drawings.

· Figure 1 shows a schematic diagram of the pump articulated to the dam.

Figure 2 shows a schematic top view of the pump.

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Figure 3 shows an enlarged and top view of a diagram of the propeller used in the pump.

In Fig. 1, reference numeral 1 denotes a pump electric motor, 2 drive shafts, 3 splash-proof ball bearings, 4 tubes to which a lifting handle 5 and a lower end lifting support 6, 7 propellers, 8 bearing housings, 9 nylon sleeve bearings are attached. The pipe clamping ring is marked with the number 10 and the bearing support structure with 11: 11a. 12 is the frame. 13 is a pump damper damper. The direction of flow of the pumped liquid is marked with an arrow A. The dam is marked with P. Br and C denote the height of the water surface before and after pumping, i.e. in the case of the figure C represents the limit below which the pump cannot pump without a change in inclination. D represents the height of the water surface on the side of the dam where, in the case of the figure, there is no pump.

The upper end of the pump pipe 4, i.e. the end from which the substance to be pumped comes out, is articulated to the upper edge of the dam P. In Figure 1, the inclination of the pump is about 45 °. The height of the lower end, i.e. the depth from which the liquid substance is pumped, is adjusted by raising or lowering the lower end of the pump, e.g. with a chain not shown in the figure, By reducing the distance between the bottom of the support 11 to the end of the pipe 4 and adjusting the inclination of the pump, e.g. in the case where the support 11 rests at the bottom of the basin, increase the possibilities for pumping deeper.

Below the propeller 7, a constriction ring 10 is placed inside the pipe 4 to reduce the diameter of the lower end of the pipe 4 and to improve the pumping characteristics of the pump. The propeller 7 is attached to the shaft 2, e.g. by means of a sleeve attachment. At the outer circumference 21 of the sleeve 20 of the propeller 7, one or more blades 22 with sharp edges, e.g. made of flat iron, are spaced apart from each other, as shown in detail in Fig. 3 3 82755. The blades 22 of the propeller 7 are thus shaped so that they can tear broken twigs and other objects accompanying the pumped liquid. However, the best way to avoid clogging the pump against possible large or hard objects is to place a net around the lower end of the pipe 4 to prevent the above objects from entering the pump.

By changing the blade angle of the propeller 7, the inclination of the pump, the size of the propeller 7, the diameter of the pipe 4, etc., the pumping power of the pump can be affected.

The pump according to the invention uses, for example, the following parts: a 1.2 kW electric motor with a speed of about 1250 rpm. The length of the drive shaft 2 has been about 150 cm and its diameter about 30 mm. At the end of the motor 1, the shaft 2 is mounted by a deep groove ball bearing 3, while at the lower end, i.e. on the propeller 7 side, the end of the shaft 2 is mounted in a 30 mm water-lubricated nylon sleeve 9 in the bearing housing. A water pipe 4 15 cm in diameter was used as the water pipe 4. The pump has been able to pump approx. 72 m3 / h with a lifting height of approx. 1 m, which, however, is not necessarily the maximum. The pump is very suitable for pumping liquid material over a dam, where liquid material is pumped from one side of the dam to the other side of the dam.

Figure 2 shows a schematic top view of the pump. It should be noted that the distance between the propeller 4 and the reduction ring 10 can be varied as necessary, also taking into account the shape of the propeller. In the pump, the ratio of the outer diameter of the sleeve of the propeller 4 to the inner diameter of the pipe 4 can be e.g. 1: 3. In addition, the distance of the suspension ring 10 to the lower edge of the propeller may be, for example, equal to or less than the outer diameter of the sleeve and. Various conversions are possible.

The invention is not limited to the embodiment shown in the description or in the drawing, but can be modified within the scope of the inventive idea of the claims. Otherwise, it should be noted that the invention has been described above only with reference to a preferred embodiment thereof.

Claims (4)

4 82755 A pump for draining leaking water from a basement, emptying and filling large or small basins, draining a well, emptying building ditches, and in particular draining lowland ditches from rainwater or the like, the pump comprising a shaft 4 mounted on a shaft 4 supported on bearings 3, 9 2, characterized in that a constriction ring 10 is attached to the pipe 4 inside it to reduce the diameter of the pipe 4, and that the propeller 7 is placed above the constriction ring 10 in its immediate vicinity. Pump according to claim 1, characterized in that the lower end of the pump comprises a support 11 supporting the lower end bearing 9 at a distance from the lower end of the pipe 4, the drive shaft 2 extending through the shrink ring 10 to the lower end bearing 9 of the shaft 2. Pump according to Claim 1, characterized in that the pump is adapted to be installed on different slopes. Pump according to Claim 1, characterized in that the pump propeller 7 is fastened to the drive shaft 2 by a sleeve 20, on the outer circumference 21 of which sharply shaped metal pieces 22 are arranged at a distance from each other. Il 5 82755