FI76166C - sewage Pumping Station - Google Patents

Description

761 66

VIEMfiRIPUMPUMAMO - AVLOPPSPUMPSTATION

The present invention relates to a sewage pumping station in which the incoming wastewater is further pumped to a treatment plant, for example, and which pumping station comprises a substantially and at least substantially cylindrical tank with two partitions separated from each other, one dry and equipped with one or more pumps and the other for wastewater.

In principle, two solutions are currently used in sewage pumping stations? submersible pumping stations and dry-running pumping stations. When submersible pumps are used, the pumping station is uniform and the pumps operate in wastewater. As pumping stations have to be serviced from time to time, the submersible pump option is unfavorable for occupational health reasons (odor nuisances, bacteria, etc.).

Recently, there has been an increasing shift to the use of pumping stations using dry-mounted pumps. In practice, the pumping station is then divided by a partition into two spaces, one of which receives wastewater and the other is kept dry. One or more pumps are installed in a dry room as needed. The pumps are connected to the wastewater space by pipes through a partition wall and start when the wastewater level rises to a certain level. The partition separating these spaces is now made straight. There are mainly two types of pumping stations of this type; rectangular pumping stations made of concrete and cylindrical pumping stations made of reinforced plastic.

The cylinders of cylindrical reinforced plastic pumping stations are preferably manufactured by mechanically laminating on a rotating drum. The problem with a pumping station like this, however, is the straight partition that has to be made by hand laminating. From a technical point of view, a straight partition is disadvantageous and has to be reinforced with additional stiffeners, 2 761 66 because otherwise the hydrostatic pressure of the wastewater will break it.

The volume of the wastewater space, which often depends on the volume flow to the pumping station, should be quite small, so that the partition wall could be close to the cylinder surface. In this case, however, it becomes impossible for a maintenance technician to access this space. However, a man's access to the water space is necessary due to the need for cleaning, for example to remove a blockage stuck in the inlet of the pump inlet pipe. Also in connection with major repairs or alterations to the pumping station, it must be possible to close the pipe entering the pumping station, for example with an expandable plug installed in the mouth of the pipe, which must be able to be installed. This means that the partition wall often has to be placed further away from the cylinder surface for maintenance reasons than would be technically necessary, which has the disadvantage of reduced maintenance of the pump section and too low starting frequencies, which can result in bottom and surface settling (long delay).

It is also advantageous for the operation of the treatment plant to have a sufficient starting frequency in the pumping stations, so that they receive water more evenly.

The object of the present invention is to provide a sewage pumping station which does not have the above-mentioned drawbacks and which is much more advantageous to manufacture. The sewage pumping station according to the invention is characterized in that the cross-section of the partition wall is substantially circular in its entire length.

A preferred embodiment of the invention is characterized in that the center of curvature of the circular arc is located on the side of the wastewater space.

Another preferred embodiment of the invention 3 761 66 is characterized in that the center of curvature of the circular arc is located on the side of the pump space.

Another preferred embodiment of the invention is characterized in that the pump space is substantially cylindrical and that the wastewater space is located outside it, the partition wall between these spaces being formed by the part of the wall of the cylindrical pump space which is connected to the wastewater space.

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The invention has numerous advantages over known sewage pumping stations. The circular partition wall, which is made of reinforced plastic, can preferably be made mechanically from a cylinder or a part thereof laminated on the drum. In addition, the partition according to the invention is technically advantageous, the stiffeners can be omitted or they can easily be made in connection with drum lamination. In addition, for maintenance work, the partition can be placed far enough away from the cylinder surface without increasing the water volume. In this case, the starting frequencies become suitable with small incoming volume flows.

In the following, the invention will be explained in detail with reference to the accompanying drawings, in which

Fig. 1 shows a cross-section of a known sewage pumping station.

Fig. 2 shows a perspective view of a sewage pumping station according to an embodiment of the invention.

Fig. 3 shows a simplified section along the line III-III in Fig. 2.

Fig. 4 shows a section according to Fig. 3 of another embodiment of the invention 4 76166.

Fig. 5 shows a section according to Fig. 3 of a third embodiment of the invention.

Fig. 6 shows a section according to Fig. 3 of a fourth embodiment of the invention.

Fig. 7 shows a section according to Fig. 3 of a fifth embodiment of the invention.

Fig. 8 shows a section according to Fig. 3 of a sixth embodiment of the invention.

Fig. 9 shows a section according to Fig. 3 of a seventh embodiment of the invention.

Figure 1 shows a cross-section of a known sewage pumping station, the tank 1 of which is cylindrical and in which the dry pump space 2 is separated from the waste water space 3 by a partition 4. The tank 1 and the partition wall are made of reinforced plastic. Two dry-mounted pumps 5 are installed in the dry pump space 2. As can be seen from Figure 1, the partition wall 4 is straight, whereby the aforementioned drawbacks are associated with such a pumping station. From a flow point of view, it would often be advantageous for the partition 4 to be located even closer to the right edge of the cross-section, so that the water space 3 becomes smaller, but the space 3 has to accommodate a maintenance man, so there is a certain minimum dimension X.

Figure 2 is a perspective view of a sewage pumping station according to the invention. The difference from the known pumping station is a circular-arc-shaped partition wall, which is marked here in broken lines and the various embodiments of which will be explained below in connection with other figures. A waste water inlet pipe 6 is arranged in the tank 1 of the sewage pumping station, from which the waste water enters the waste water space 3. The wastewater space has a level sensor (not shown in the figures) which switches on the pumps 5 when the wastewater level rises to a certain level. Wastewater leaves the pumping station via pipe 7, for example to a treatment plant. The dry pump space 2 and the waste water space 3 are thus separated by a partition wall 4 and there is a manhole 8, 9 for maintenance work on each space.

Like known sewage pumping stations, the pumping station according to the invention is made of reinforced plastic. Pumping stations are immersed in the ground so that usually only the hatches remain visible.

Figure 3 shows a cross-section of the pumping station according to Figure 2. Looking at the figure, the advantages of a curved partition are undeniably observed. If the maximum distance X of the partition 4 from the surface of the cylinder is the same as when using a straight partition (Fig. 1), the pump space 2 is considerably larger in the solution according to the invention. Likewise, the curved septum is stronger and better withstands the hydrostatic pressure of wastewater. In Figure 3, two pumps 5 are installed in the pumping station, but their number can vary as needed. When mounting the pumps as shown in Fig. 3, there is more space between them for maintenance work.

Figure 4 shows a preferred embodiment of the invention. In it, the water space 3 is cylindrical and is located completely inside the tank 1, lateral to this. The partition 4 between the dry pump space 2 and the waste water space 3 is then a complete circle.

Figure 5 shows a preferred embodiment of the invention, in which the partition wall 4 is made curved in the opposite direction. Such an alternative is suitable for larger future volume flows, in which case the water space 3 must be so large due to the starting frequencies of the pumps 5 that the dimension X becomes naturally sufficient.

Figure 6 shows an embodiment in which the pump space 2 is cylindrical and the water space 3 is connected to the outside thereof. The partition wall 4 is then formed by the part of the wall of the pump space which is in communication with the water space 3.

Other possible embodiments of the invention are shown in Figures 7-9. It is advantageous for the invention that the length of the circular arc of the additional wall required for the water space 3 is the same as the length of the circular circumference divided by an integer (preferably 1-4), whereby the cylinder obtained by drum lamination can be utilized in several pumping stations.

It will be clear to a person skilled in the art that the invention is not limited to the above-mentioned exemplary embodiments, but can be varied within the scope of the appended claims.

Claims (7)

A sewage pumping station from which the incoming wastewater is further pumped, for example, to a wastewater treatment plant and which comprises a substantially and at least largely cylindrical container (1) having two spaces separated by a partition (4), one of which (2) is substantially dry and provided with one or more pumps (5) and the other (3) is intended for wastewater, characterized in that the cross-section of the partition (4) is a circular path along its entire main length. Sewage pumping station according to claim 1, characterized in that the curvature center of the circular cup is located in the wastewater space (3). Sewage pumping station according to claim 1, characterized in that the curvature point is located in the pumping space (2). Sewage pumping station according to claim 1 or 3, characterized in that the pumping space (2) is substantially cylindrical and that the wastewater space (3) is located outside it, the intermediate wall (4) between these spaces being formed by the wall section of the cylindrical pumping space (). , which is in communication with the wastewater space (3). Sewage pumping station according to claim 1 or 2, characterized in that the wastewater space (3) is substantially cylindrical and extends at least partially within the pumping space (2), the intermediate wall (4) between these spaces being formed by the wall section 3 of the cylindrical drainage space (3). , which is in communication with the pump compartment (2).