Classifications

• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03F—SEWERS; CESSPOOLS
  • E03F5/00—Sewerage structures
  • E03F5/22—Adaptations of pumping plants for lifting sewage
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
  • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
  • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply

Definitions

• the invention relates to a sewage lifting plant with a collecting container for liquids, in particular waste water, feces or the like, with a device for emptying the container, in particular a pump connected to a motor, which is arranged as a motor pump unit completely or partially lowered in Benzol ter, the container has at least one inlet and outlet pipe for the liquids and the wastewater lifting plant is provided with a device for switching the pump depending on a liquid level within the container.
• Such sewage lifting systems are often used as Klakalienhebeanlagen application and are used in buildings and facilities when a wastewater to be pumped below a so-called backwater level.
• the backflow level is usually a height level of an external sewer system located outside a building under a road.
• means are needed to monitor the level of liquid within the container to ensure timely starting and stopping of the pump.
• the wastewater lifting plant has a collecting container and a motor pump unit located therein, which receives its switching signals by a pneumatic control bell.
• This is a pitot tube whose volume of air trapped as the contents of a container rise and thus creates a static pressure in the pitot tube.
• This pressure is detected by a pressure sensor and its value is converted into a filling level of the respective container.
• dynamic pressure systems which are available in a wide variety of shapes, are vulnerable to the pressure inside the container. dirty water and its components.
• float switches have become established in the market for controlling the pump, as are known, for example, from DE-A 3 430 527.
• a switch actuated by a float triggers the necessary switching on and off movements of a pump.
• float switches are limited by deposits or solid components in the liquid in their function or endangered.
• the invention is therefore based on the problem to develop a level detection, reliably detected by the level in the tank problems and can be dispensed with elaborate, exposed to the liquid additional protective devices.
• the solution of the problem provides that the container bottom or at least a partial surface of the container bottom is formed elastically resilient depending on the container level, that one or more sensors are arranged on the outside of the elastically resilient container bottom surface and measure their deformation.
• the problem of polluting level sensors is easily avoided. Since the sensors detecting the degree of deformation of a container bottom part are mounted on the outside of the container, they are completely removed from the harmful effects of a wastewater. By arranging the container bottom part with a distance to a footprint for the sewage lifting unit, a cavity is formed therebetween. This cavity is at the same time a shelter for the external sensors with respect to external mechanical see influences and prevents damage to the resilient container bottom part.
• the container bottom or a partial surface thereof are designed so that at least one sensor is arranged at a container bottom measuring point, at which an evaluable deformation occurs at the maximum filled container. Likewise, it is provided that at least one sensor is arranged at a container bottom measuring point, at which an evaluable deformation occurs at minimally filled container. This ensures the generation of sensor signals with which the necessary switch-on, switch-off or alarm points of a wastewater lifting plant or the associated pump and the dependence on the respective fill level in the container can be reliably detected.
• the maximum deformation occurring at a measuring point of a loading container is within the respective permissible material values. This is achieved by a corresponding shaping of the container bottom or a part thereof.
• an elastically yielding element sealingly and flexibly held and to connect with at least one sensor.
• a sensor signal on a respective fill level is processed by the known per se evaluation of such wastewater lifting systems for a pump control.
• one or more sensors are mounted interchangeable. This can be done by means of simple snap or clamp connections and simplifies the production while easy replacement of a sensor in a possible maintenance case.
• Fig. 1 shows a mounting diagram for a wastewater lifting plant
• Fig. 2 is a view of the sewage lifting unit
• FIGS. 3 and 4 are views of sensor arrangements and FIGS Fig. 5 is an enlarged view of a floor.
• FIG. 1 a cross section through a building is shown, in the basement of a sanitary device is shown.
• a sewage lifting plant 1 the sewage of the sanitary device and other liquids to be disposed of flow and are collected in it until a sufficiently high level for a case by case promotion is achieved.
• the sewage lifting plant consists of a liquid and odor-tight container 2 and a sealingly arranged therein pump 3 in the form of a motor pump unit, which is designed for the trouble-free promotion of such liquids.
• Via a feed line 4 a waste water is introduced into the container 2 and conveyed via a drain line 5 in the form of a pressure line via a backflow level 6, to drain from there into a sewer system 7.
• such a container 2 is provided with a - not shown - ventilation, whereby a gas removal is achieved and the formation of an overpressure in the container 2 is prevented.
• a ventilation connection is usually led over the roof of a building in order to avoid odor nuisance.
• FIG. 2 shows an enlarged view of a side view of such a sewage lifting device according to the prior art.
• the collecting the waste water tank 2 is hermetically sealed to prevent their escape and odors in a building.
• the container 2 is connected to a supply line 4 and a drain line 5, wherein in the latter a check valve 8 and a check valve 9 are arranged.
• Partially immersed in the container 2 is an electrically driven pump 3. It delivers into the drain line 5 and is always turned on only when needed. For this purpose, it is connected to a switching device 10 for controlling and monitoring the operation of such a wastewater lifting plant.
• a float switch 11 is shown in dashed representation as prior art. With such arranged within the container 2
• Float switch a signal is transmitted to the switching device 10 upon reaching three tank-level tank levels P A , P E and A shown and triggered by this a switching function for the sewage lifting unit.
• the lowest line P A stands for the switching function "pump off.”
• the pivotally mounted float switch then hangs down the float rises until it reaches a switching position at a tank level P E which corresponds to the switching function "pump on” and results in the pump being switched on by the switching device 10, and when the uppermost third tank level is reached A, an inadmissible operating condition, triggers an alarm function
• the container receives a larger amount of waste water than can be pumped away, the alarm function prevents flooding of the basement rooms by backflowing and exiting the inlets of the connected equipment This condition may also occur in the event of a failure of the pump, so care must be taken to ensure that such a float switch is always in operation.
• FIG. 3 shows an enlarged section of the container 2 in the form of a cross section through a container bottom 12 as an improvement to the previous solutions.
• the bottom 12 of the container 2 has a partial region 12.1 which is above and at a distance from a mounting plane 13 for As a result, a completely or partially closed cavity 16 is formed between the mounting plane 13 and the container 2 resting thereon with the bottom surface 12. This shields the resilient portion 12.1 of the container bottom 12 from external influences.
• the portion 12.1 of the container bottom 12 is elastically yielding and on its outer side 14, one or more sensors 15 are arranged. The distance between the sensor 15 mounted at the lowest point and the mounting plane 13 is dimensioned so that when a container 2 is completely filled, contact with the mounting plane 13 is reliably avoided.
• the respective degree of filling of a container 2 acts in the form of a liquid column deforming on the elastically yielding part surface 12.1. Its respective degree of deformation detected at least one outer sensor 15. Its signal is converted by means of the switching device 10 in a level signal, displayed and / or used to control the pump 3.
• the container bottom surface Due to a liquid level which arises within the container and the resulting liquid column, the container bottom surface is differently deformed or deflected. The orders of magnitude of these deformations are within the permissible values of the material used for the container 2.
• strain acting which are used as a direct measure of the level within the container 2. Since the sensor 15 is arranged in a cavity 16 which is formed between the mounting plane 13 and the container bottom part 12.1, which is raised in contrast thereto, an additional protection space for the sensor 15 results.
• the signal lines of the sensor 15, which are not shown here, are also completely outside the sewage lifting unit and are therefore easy to connect to the switching device 10. The usual cable bushings in the container 2 are thus completely eliminated. This provides an additional safety feature for safe operation.
• Fig. 4 shows another embodiment of the bottom surface 12.
• the resilient container bottom part 12.1 additionally designed an elastically yielding container bottom part 12.2 as a liquid-tight membrane used.
• This container bottom part 12.2 may be made of a rubber material, may be formed as a plate made of an elastic plastic, designed as a metallic membrane or as a combination of such materials.
• the respective liquid level in the container 2 deflects the container bottom part 12. 2 in the direction of the outside 14.
• FIG. 5 shows the arrangement of the sensor 15 in a replaceably designed housing 17, which can be fastened to the container bottom part 12.1 by known means 18. In the embodiment shown, it also serves for fastening the container bottom part 12.2.
• the sensor 15 may be designed as an inductive system for a displacement measurement or as a piezo-quartz for a pressure measurement.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Sewage (AREA)
• Control Of Positive-Displacement Pumps (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Level Indicators Using A Float (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Separation Of Suspended Particles By Flocculating Agents (AREA)
• Control Of Non-Electrical Variables (AREA)
• Control Of Non-Positive-Displacement Pumps (AREA)
• Processing Of Solid Wastes (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

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ID=37766351

Family Applications (1)

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• 2005
  • 2005-12-17 DE DE102005060556A patent/DE102005060556A1/de not_active Withdrawn
• 2006
  • 2006-12-13 ES ES06819027T patent/ES2319820T3/es active Active
  • 2006-12-13 DE DE502006002856T patent/DE502006002856D1/de active Active
  • 2006-12-13 RU RU2008122619/03A patent/RU2374400C1/ru active
  • 2006-12-13 DK DK06819027T patent/DK1960608T3/da active
  • 2006-12-13 EP EP06819027A patent/EP1960608B1/fr active Active
  • 2006-12-13 BR BRPI0617123A patent/BRPI0617123B1/pt active IP Right Grant
  • 2006-12-13 AT AT06819027T patent/ATE422585T1/de active
  • 2006-12-13 AU AU2006326327A patent/AU2006326327B2/en not_active Ceased
  • 2006-12-13 CN CN2006800474694A patent/CN101331279B/zh active Active
  • 2006-12-13 WO PCT/EP2006/011966 patent/WO2007068455A1/fr active Application Filing
  • 2006-12-13 PL PL06819027T patent/PL1960608T3/pl unknown
• 2008
  • 2008-06-12 US US12/138,035 patent/US20080310968A1/en not_active Abandoned

Non-Patent Citations (1)

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