DE8900630U1 - Pumping device - Google Patents

Description

The invention relates to a device for pumping liquid media with a high material density and long-fiber textiles from containers in pipeline systems. In such devices, the medium should be transported into the pipeline system over the shortest possible distances in order to achieve short emptying times.

It is known that in order to fulfil the task, the liquid media with high material density (ATRO) and with long-fibre textiles are sucked out of containers, temporarily stored in a container (vacuum container) and from there pumped into a piping system, for example by means of a centrifugal pump (thick material pump). Facilities of the aforementioned type are space- and energy-intensive and require a high level of control effort.

The use of centrifugal pumps is also known*. Centrifugal pumps of this type must suck in the medium when the container is located at a lower level or when the suction pipe is led out above the container. Centrifugal pumps of this type for the medium in question are not self-priming and are therefore not suitable.

The well-known centrifugal pumps with side channel impeller are not suitable for this application due to the nature of the medium.

In addition, mechanically operated piston pumps with mechanically operated valves are used. Due to the nature of the medium (high material density and long-fiber textiles), trouble-free operation is not possible.

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The invention is based on the object of creating a device that allows the liquid medium to be fed directly into the pipeline system without intermediate storage, taking into account the nature of the medium. The invention is also based on the object of cleaning the connection area: suction pipe on the container/coupling after pumping out the media residues.

This problem is solved according to the invention in that the medium is sucked through the non-self-priming sewage pump. As soon as the sewage pump is exposed to a bubble-free liquid flow, the sewage pump is switched on and conveys the sewage into the pipe system without intermediate storage. After pumping is complete, the sewage pump is switched off and the vacuum pump is switched on. The vacuum flow flows through the connection area: suction pipe on the container/coupling and thus cleans this area of liquid residues and adhering drops. When the connection point is subsequently separated, no liquid components escape. In addition, the sewage pump is also emptied of liquid residues. The sometimes alternating pressure conditions that occur after the sewage pump (centrifugal pump as thick matter pump) are taken into account by special circuit-technical measures.

The advantages achieved with the invention are that intermediate storage in containers is not necessary. This eliminates the costs of production and maintenance, including costs for repeated testing of the containers (Pressure Vessel Ordinance). The space for storing the intermediate containers can be used for other purposes.

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Due to the significantly smaller space requirement, it is possible to install the wastewater pump and the vacuum pump on a mobile unit. The pressure port of the wastewater pump can be directed directly into the wastewater shafts of the piping system.

A further advantage is that the energy requirement for each extraction process is significantly reduced.

When designed as a mobile compact unit, the line between the wastewater pump and the piping system can be designed so that it can be coupled. To ensure that no liquid residues escape when uncoupling, the pressure nozzle of the vacuum pump is inserted into the piping system immediately before the coupling area. Liquid residues are fed to the stationary piping system by the compressed air from the vacuum pump. This arrangement also has the advantage that the exhaust air is also fed to the sewer system. This avoids odor nuisances. The compressed air from the vacuum pump does not affect the stationary sewer system because of the small amount.

The device according to the invention is explained in the following drawing.

Fig. 1 shows the pumping device in schematic form.

Fig.1 shows the waste water tank (1) to be emptied with the suction line (2). A coupling (3) can be placed on the free end of the pump line (2). The coupling (3) is connected to the waste water pump (5) via a line (4). A shut-off device (12) can be arranged in the line W. The discharge nozzle of the waste water pump (5) is connected directly or via a line (6) to the waste water line (9). The line (6) or the waste water line (9) is supplied with vacuum via the

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via the line (7). A shut-off device (11) and a check valve (10) can be arranged in the line (7). The vacuum can be generated by the vacuum pump (8). Automatic check valves 1J can be arranged before or after the line (6) enters the line (9). Due to the low vacuum requirement, the vacuum can also be stored in the container (14).

If the shut-off device (12) arranged in the line (4) is opened when the waste water pump (5) and the lines (6) and (9) are evacuated, the medium to be pumped out flows from the container (1), the suction line (2), the coupling (3), the line (4), the waste water pump (5) into the lines (6) and (9). As soon as the waste water pump (5) is supplied with the medium, the waste water pump (5) is switched on, e.g. via a flow monitor, and the vacuum pump (Θ) is switched off or the vacuum flow is interrupted by the shut-off device (11) in the line (7).

The medium is then only transported further into the line (9) by the waste water pump (50). In order to prevent the medium from penetrating the vacuum pump (8), a check valve (10) is arranged in the line (7). After the pumping has ended, the waste water pump (5) can be switched off and the vacuum pump (8) switched on, e.g. via a current monitor in the line (4). This removes the liquid residues from the area of the coupling (3), the suction line (2), the line (4) and the waste water pump (5).

In the line (6) between the check valve (13) and the stationary line (9) a coupling (15) can also be inserted.^ In order to remove the liquid residues in the area of the

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If the coupling (15) is removed, it is possible to insert the pressure line (6) of the vacuum pump (8) into the line (6) in the area of the coupling (15). This simultaneously leads to the contaminated process gases being fed into the sewer system.

Claims (9)

1«i57 Otftttf FREI M LIT H Qm ta H 49 3734 38A2 B . 2 .- Lohbreede 5> A-970 Bad Oeynhausen 2 Pumping device Protection rights 1.) Device for emptying containers, thereby shows that a vacuum pump (8) is arranged after the water pump (>). 2.) Device according to claim 1, characterized in that the line (4) is connected to the vacuum pump (3) via the waste water pump (3) of the line (7). 3.) Device according to claims 1 and 2, characterized in that the line system (6; 9) arranged after the waste water pump (5) is connected to the vacuum pump (b) , e.g. via the line (7). 4.) Device according to claims 1 to 3, characterized in that at least one non-return valve (10) is arranged in the line (7). 5.) Device according to claims 1 to 3, characterized in that at least one shut-off device (12) is arranged in the line (4). G.) Device according to claims 1 to 5, characterized in that at least one shut-off device ('λ1) is arranged in the line (7). 7.) Device according to claims 1 to 6, characterized _in that at least one non-return valve (13) is arranged in the line (9). ^ M ^i. ■' S ¹ P 16:57 Ö &THgr;&THgr; Ö FRtIM UX h &iacgr; i3m fc. H4^ 5734 3362 (C (ff 8.) Device according to claims 1 to 7» characterized in that when the waste water pump (5) is actuated, the shut-off device can be closed. 9.) Device according to claims 1 to 8, characterized in that a coupling (15) is provided in the line (6) between the non-return valve C'3) and the line (9). 1&ogr;.) Device according to claims 1 to 9, characterized in that the pressure line (16) of the vacuum pump (8) can be introduced into the line (6) in the region of the coupling (15).