DE7531363U - LEVELING DEVICE FOR WATER CONTAMINATED WITH THICKNANTS - Google Patents

Description

Peter Cremer, 4044 Kaarst, Lange Hecke 5 Lifting device for sewage mixed with thick matter

The invention relates to a lifting device for thick matter offset waste water that has an inlet chamber, one with the inlet chamber and the drain line via a non-return valve connected plenum, a pump sump connected to the plenum and a pump for have the conveyance of the waste water, in which the pressure line of the pump is arranged in the collecting space, with a A rake-equipped separating device is connected upstream and one in the pressure line of the pump between the collecting chamber and the pump Control chamber is arranged, which is in communication with your pump sump and a connection that interrupts this connection during operation of the pump, in particular designed as a control flap Control valve open / open.

In practice, such lifting devices generally exist

Deutsche Bank AG Krefeld 103/1525 BLZ 320700 BO ■ Scattt-Sparkesse Krefekl 305722 BLZ 32050000 · Poeascheck Essen 4055-431 BLZ 360X3043

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from an inlet chamber and a collecting chamber connected to it. The collecting space is connected to a separating device Separation of the thick matter connected to a pump sump. From this pump sump the sewage becomes at a certain The water level is printed by a pump via a control chamber into the collecting chamber and from there together with the thick matter the 'drain line supplied.

The inlet chamber is closed off from the collecting space by a non-return valve that closes when the pump is switched on is and according to a known embodiment when the pump is switched off under its own weight constantly in the open position is located. In the case of wastewater with a high concentration of thick matter, deposits can form in front of the flap, so that the flap no longer closes tightly without any problems. It has been suggested to place one on the non-return valve at a distance from the check valve Rear of the non-return valve executed, to be arranged from the pump with sewage liquid line section. According to this proposal, although increased pressure is exerted on the non-return valve, so that the valve better closes. However, this does not prevent the deposition of thick matter in the closed or open state, so that malfunctions in operation cannot be ruled out.

The invention is based on the object of creating a lifting device which is free from the disadvantages described, due to the in particular a deposition of thick matter on the Non-return valve is avoided and the one from blockages

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allows trouble-free operation of the device.

This object is achieved by a lifting device for wastewater mixed with thick matter, which has an inlet chamber, one with the inlet chamber and the drain line via a check valve connected collecting space, one with the collecting space connected pump sump and a pump for pumping the waste water, in which the pressure line the pump is preceded by a separating device provided with a rake and arranged in the collecting space and in the pressure line the pump is arranged between the collecting chamber and the pump, a control chamber which is in communication with the pump sump and an interruption of this connection during operation of the pump, has in particular designed as a control flap control valve. This lifting device is characterized by that for pumping wastewater from the control chamber which is closed off from the pump sump when the control flap is closed A flushing line is arranged in the inlet chamber between the control chamber and the inlet chamber. This flushing line succeeds It is important to avoid the build-up of thick matter on the non-return valve and to avoid blockages To enable operation of the lifting device. Waste water is taken from the control chamber and fed into the via the flushing line Inlet chamber is pumped, whereby the inlet chamber is cleaned. A particular advantage of this arrangement is that the waste water in the control chamber through the upstream separating device of thick matter fr ^ i is. It is also advantageous

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indicate that the working pressure generated by the pump can be used to flush the inlet chambers. The underlying of the invention Flushing line can be used with single-system, double-system or multiple-system lifting systems. The flushing line on which the invention is based is expedient between a side wall of the control chamber and the side wall the inlet chamber arranged. In this embodiment, the flushing line is essentially in the space above the pump sump. It is particularly useful if the flushing line has no sharp bends or cross-sectional constrictions is guided from the control chamber into the inlet chamber. This makes it possible to largely avoid flow failures, so that when the pump is switched on, a pressure builds up immediately in the flushing line which is sufficient to cope with a major off formation of the inlet chamber to enable a complete cleaning. .

The flushing line advantageously opens into the inlet chamber at an angle of 90 ° to the inlet line. this has the advantage that larger amounts of thick matter, which are very often deposited in poorly laid supply lines and then from Large quantities of water must be supplied to the system so that the system cannot become clogged. Furthermore it is It is advantageous if the flushing line opens into the inlet chamber in the area of the inlet line.

According to an advantageous embodiment, with a multiple lifting system a chamber system is opened during the flushing process.

As next to the working, closed chamber system If another chamber system is open, thick matter or dried-on paper residues are washed into this and delivered without any problems when the pump connected to this system is in operation. According to a particularly preferred one Embodiment In multi-chamber lifting systems, a control chamber is connected to the inlet chamber via a flushing line. In this way it is possible that the rinsing does not take place every second pumping process, but rather with all pumps works at the same time.

An exemplary embodiment of the invention is shown in the drawing. Show it:

1 shows a schematic representation of a lifting device with two collecting spaces and two pumps in section;

FIG. 2 is a plan view of the lifting device shown in FIG. 1.

The lifting device on which the invention is based is shown using the example of a two-system lifting device. the Fig. 1 shows with 1 ventilation line and with 2 an inlet line for the waste water and thick matter. Through the inlet pipe 2, the incoming wastewater and thick matter are fed into the inlet chamber 3, whose inlet line 2 opposite section of the housing wall is arranged running obliquely from top to bottom. At this oblique running section is on the inlet chamber 3

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turned wall side a non-return flap 4 pivotably arranged, the one in the sloping housing wall section located opening 5 is able to close. The check valve 4 tends to be under its own weight to swivel constantly into the open position.

The waste water and thick matter flowing into the inlet chamber 3 flow through the opening 5 into a collecting space 6. From the collecting space 6 the waste water flows through a separating device provided with a rake and via a control chamber into the stationary pump 9 (not shown here), which is designed as a centrifugal pump. . The wastewater flows from there via the suction pipe of the pump 9 into a pump sump. The control chamber 11 accommodates a non-return valve (control valve 12) provided with a flow guide shell. . * In Figure 1 st control damper 12 rested at pump 9 in the manner shown ent Of f - shown "Settin g. A pump 9 designed as a centrifugal pump is assigned to each control chamber 11. The line section 16 is connected to the control chamber 11. This line section 16 is led into the area of the non-return valve in such a way that the mouth openings are approximately in the middle of the rear of this non-return valve 4.

With a pressure monitor 29 is designated, the three switching bells 30, 31 and 32 are assigned, which are located in the pump sump 10 are located. "The switching bell 30, for example, pneumatically switches the pump 9.

Between the control chamber 11 and the inlet chamber 3 is the

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Game line 33 arranged. As soon as the control flap 12 is closed is, the control chamber 11 is closed from the pump sump. In this way, the pump 9 (not shown) conveys waste water through the flushing line 33 from the control chamber 11 into the inlet chamber 3.

In Fig. 2 the interior of the lifting device shown in Fig. 1 is shown. The double system lifting system can be clearly identified, with corresponding parts with an apostrophe Marked are. The pumps 9 and 9 'change their mode of operation automatically, so that the collecting spaces "6 and 6" always can be rinsed in a changing rhythm. When the sewage level rises In the pump sump 10 (switch-on water level) when the bell 30 is reached, a corresponding switch-on pulse is generated given for the Pumie 9 so that it starts to work. As a result, the control flap 12 is closed and waste water is pumped through the flushing line 33 into the inlet chamber 3. Simultaneously wastewater through the line section 16 against the non-return valve 4 injected. The non-return valve 4 is thereby immediately moved into the closed position when the pump 9 is switched on, so that the collecting space 6 no more wastewater and thick matter can flow.

Claims (7)

»Claims 1. Lifting device for wastewater mixed with thick matter, the one inlet chamber, one with the inlet chamber and the drain line via a non-return valve connected collecting space, one with the collecting space, in connection Has pump sump and a pump for pumping the wastewater, in which the pressure line of the pump a separating device provided with a rake and arranged in the collecting space is connected upstream and in the pressure line the pump, a control chamber is arranged between the collecting space and the pump, which is in communication with the pump sump and one that interrupts this connection during operation of the pump, in particular as a control flap designed control valve, characterized in that for pumping waste water from dar with closed control flap (12) from the pump sump (10) closed control chamber (11) into the inlet chamber (3) A flushing line (33) is arranged between the control chamber (11) and the inlet chamber (3). 2. Lifting device according to claim 1, characterized in that the flushing line (33) between a side wall of the Control chamber (11) and the side wall of the inlet chamber (3) is arranged. 3. Lifting device according to claim 1 or 2, characterized thereby r Λ * net that the flushing line (33) without sharp bends or
Cross-sectional constrictions from the control chamber (11) to in
the inlet chamber (3) is guided, 4. Lifting device according to one of claims 1 to 3, characterized
characterized in that the flushing line (33) Vn at an angle
at 90 ° to the inlet line (2) opens into the inlet chamber (3). 5. Lifting device according to one of claims 1 to 4, characterized
characterized in that the flushing line (33) in the area of
Feed line (2) opens into the inlet chamber (3). 6. Lifting device according to one of claims 1 to 5, characterized
characterized in that in multi-chamber lifting systems, a chamber system is open during the flushing process. cc 7. Lifting device according to one of claims 1 to 6, characterized in that * characterized that with multi-chamber lifting systems each one. _Ä i c «Control chamber (11) via a flushing line (33) with the In _cv? running chamber (3) is connected. Π