Wastewater Grinder Pump with Internal Comminution
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Solution Overview
Problem
Conventional sewage pumping stations face issues with blockages during the pumping of liquids mixed with solid admixtures, poor sealing against waste water and odors, complex maintenance, and a short service life due to integrated housing parts.
Innovation Solution
A centrifugal pump device with a comminution arrangement featuring a stationary element mounted inside the housing part, allowing for easy assembly and maintenance from above, and a rotational sintering process for a positive connection between the housing part and container, ensuring reliable sealing and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stationary element of the comminution arrangement is mounted on the outside of the housing part, then the assembly is simpler, but the maintenance becomes complex and expensive when the housing is integrated into the container
Solution Approach 1:
The stationary element is inverted from its conventional outside-mounted position to an inside-mounted position on the housing part. This allows the comminution arrangement to be assembled and maintained from above through the container opening, making maintenance accessible without dismantling the integrated housing.
Solution Approach 2:
The stationary element is nested inside the housing part, which itself is integrated into the container. This nested arrangement allows the comminution device to be serviced from the container opening while maintaining the compact integrated structure.
2Stability of the object's composition
If the housing part is integrated into the container using conventional sealing methods, then the structural stability is improved, but the sealing against waste water and odors becomes unreliable
Solution Approach 1:
A sealing element is introduced as an intermediary component between the housing part and the container. This sealing element creates a reliable seal that prevents waste water and odors from escaping, while maintaining the structural stability of the integrated construction.
3Quantity of substance
If a flexible pipe is used to extend the suction opening closer to the bottom of the container, then the switching volume is increased, but the pipe collapses due to negative pressure and blocks the suction opening
Solution Approach 1:
The patent uses a rigid or semi-rigid suction pipe extension instead of a flexible pipe, eliminating the collapse problem while maintaining the ability to reach closer to the container bottom for increased switching volume.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution prevents blockages, ensures reliable sealing against waste water and odors, simplifies assembly and maintenance, and extends the service life of the device by integrating the comminution device and centrifugal pump housing securely within the container.
Implementation Method 1
a rotational sintering process for a positive connection between the housing part and container, ensuring reliable sealing and stability
Implementation Method 2
at least one centrifugal pump for conveying the medium from the container
Data Source
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AI summary
The invention relates to an apparatus comprising a container (1) for collecting a medium. The apparatus has a centrifugal pump for conveying the medium from the container (1), and has a comminuting assembly. The comminuting assembly is arranged upstream of an impeller (8). The comminuting assembly has a rotating element (13) which interacts with a fixed element (15) in order to comminute solid impurities in the medium. The fixed element (15) is mounted on the interior of a housing portion (6) of the centrifugal pump.