Sewer Cleaning Vehicle Pivot Bearing Support Rollers
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Solution Overview
Problem
Existing sewer cleaning vehicles face restricted propulsion and mobility due to increased friction caused by the high-pressure hose overlapping with pivot bearings, limiting their working range and operational efficiency.
Innovation Solution
The sewer cleaning vehicle features a pivotable telescopic boom with support rollers that can move between two positions, allowing the high-pressure hose to be guided securely between roller bodies and support rollers, covering a 320-degree working area without slipping or jumping out of the roller track, and can be extended to 360 degrees with additional support rollers, enabling efficient cleaning of areas both in front of and behind the vehicle without cumbersome maneuvering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the high-pressure hose is looped around the pivot bearing to enable 360-degree rotation of the telescopic boom, then the working area is increased, but friction increases and restricts propulsion and mobility of the hose
Solution Approach 1:
Roller bodies are introduced as intermediary elements between the high-pressure hose and the pivot bearing. These rollers reduce friction by allowing the hose to move over them rather than directly contacting the pivot bearing, thereby maintaining 360-degree rotation capability while eliminating the harmful friction effect that restricts hose propulsion and mobility
Solution Approach 2:
The direct mechanical contact between the high-pressure hose and the pivot bearing is replaced with a roller-based system. This substitution transforms the friction-based mechanical interaction into a rolling contact system, significantly reducing friction and improving hose mobility while preserving the full rotational working area
2Ease of operation
If the high-pressure hose is guided through roller bodies in the pivot bearing, then propulsion is improved, but the hose may slip or jump out of the roller track
Solution Approach 1:
The support structure is segmented into multiple discrete support rollers distributed around the pivot bearing rather than using a continuous guide. This segmentation allows the hose to be supported at multiple points along its path, improving propulsion while the strategic positioning of individual rollers prevents slippage and jumping out of the roller track
Solution Approach 2:
The support rollers are designed to be movable rather than fixed, allowing them to dynamically adjust their positions to follow the hose as it moves and rotates. This dynamic adaptation ensures continuous reliable support and guidance of the hose throughout its full range of motion, preventing slippage while maintaining ease of propulsion
3Reliability
If support rollers are added to prevent hose slippage, then reliability is improved, but device complexity increases
Solution Approach 1:
The support rollers serve multiple functions simultaneously: they reduce friction to improve hose propulsion, provide structural support for the hose, and prevent slippage and jumping out of the roller track. By combining these functions into a single component, the design achieves high reliability without proportionally increasing device complexity
Solution Approach 2:
The support rollers are designed to automatically follow and support the hose as it moves and rotates around the pivot bearing. The system is self-adjusting and requires no external control or additional complex mechanisms, achieving reliable hose guidance through the inherent geometry and motion of the rollers themselves
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
This design enhances the operational safety and efficiency of the vehicle by preventing hose slippage and allowing for extensive coverage without the need for complex maneuvers, ensuring effective cleaning of sewers and sludge pits with reduced travel times between cleaning processes.
Implementation Method 1
The rotary bearing has roller bodies for the high-pressure hose. These roller bodies are arranged in a circle around the axis of the rotary bearing. The pivot bearing has support rollers for the high-pressure hose, which are arranged around the axis of the pivot bearing.
Implementation Method 2
Water is pumped into the canal through the high-pressure hose; this water is also used to propel the high-pressure hose into the canal. By pulling the high-pressure hose backwards through the channel, the water escaping backwards through a nozzle of the high-pressure hose can clean dirt adhering to the channel wall.
Data Source
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AI summary
The invention relates to a sewer cleaning vehicle with a swiveling telescopic boom that can be positioned above the opening of a sewer. A high-pressure hose (42) is mounted on a hose reel so that it can be wound and unwound, allowing it to be extended from the vehicle and into the telescopic boom. A suction hose (24) can be inserted into and withdrawn from a storage device (22) on the vehicle. The telescopic boom is rotatably mounted on a horizontally arranged pivot bearing (20), the pivot bearing (20) having roller bodies for the high-pressure hose (42) arranged circularly around the axis of the pivot bearing (20).In a first position of the telescopic boom, the high-pressure hose (42) rests at least partially against the roller bodies of the rotary bearing (20); in a second position of the telescopic boom, the high-pressure hose (42) is guided from the hose reel into the telescopic boom without contacting the roller bodies. According to the invention, the rotary bearing (20) has support rollers (70) for the high-pressure hose (42). These support rollers (70) are movable such that in a first position (74) they are located approximately at the level of the roller bodies, so that the high-pressure hose (42) is guided between the roller bodies and the support rollers (70). In a second position (76), the support rollers (70) are located above or below the roller bodies.