Automated Heat Exchanger Tube Cleaning Device
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Solution Overview
Problem
Current high-pressure cleaning devices for heat exchangers are unsafe, cumbersome, and inefficient, with limited precision and safety features, particularly due to reliance on pneumatically operated motors and lack of effective displacement sensors, which complicates the identification and cleaning of individual tube openings.
Innovation Solution
An automated device utilizing electric motors, specifically stepping motors, with encapsulation for safety, and integrated zero sensors for precise positioning, combined with a camera system for image processing and hose guidance, enables accurate detection and cleaning of tube openings while minimizing operator risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pneumatically actuated motors are used to move the positioning device, then the device can operate in high-pressure water environments, but positioning precision and control accuracy deteriorate
Solution Approach 1:
The patent replaces pneumatic motors with electric motors that are encapsulated in pressure-resistant housings. This substitution allows precise electronic control of the positioning device while maintaining operation capability in high-pressure water environments. The encapsulated electric motors provide both the reliability needed for water environments and the precision control that pneumatic systems cannot achieve.
2Measurement precision
If electrical components are used for precise positioning, then positioning precision improves, but safety risks increase due to high-pressure water exposure
Solution Approach 1:
The patent introduces pressure-resistant encapsulation housings as intermediaries between the electric motors and the high-pressure water environment. These housings protect the electrical components from water damage while allowing the motors to operate precisely. The encapsulation acts as a barrier that eliminates safety risks without compromising positioning accuracy.
3Measurement precision
If displacement sensors are integrated for each hose, then positioning accuracy improves, but device complexity increases
Solution Approach 1:
The patent integrates displacement sensors into the existing hose guidance structure, allowing the guidance system to serve dual purposes: mechanical support and position measurement. This integration approach reduces overall device complexity compared to adding separate sensing systems, as the sensors utilize the existing structural framework for mounting and signal transmission.
4Ease of operation
If a lightweight and compact device is designed for easy transport, then ease of operation improves, but structural stability may deteriorate
Solution Approach 1:
The patent employs a modular design where components can be quickly assembled and disassembled. The device structure is optimized to provide maximum stability during operation while minimizing weight for transport. The modular approach allows the same components to serve both portability needs and structural integrity requirements when properly configured.
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 provides a safer, more efficient, and compact cleaning system that can be easily transported, ensuring precise positioning and effective cleaning of heat exchanger tubes with reduced risk to personnel and extended equipment lifespan.
Implementation Method 1
At these high pressures, the water jets exiting a nozzle have such high momentum that they mechanically remove contaminants from the inner walls of the heat exchanger tubes
Implementation Method 2
The drive unit has an electric motor, preferably a stepper motor
Data Source
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AI summary
The device for automated high-pressure cleaning of the tubes (24) of a heat exchanger comprises: - a motorized positioning device, which has a) an x-axis (28), b) an x-carriage (30) movable along the x-axis (28) by means of an x-electric motor (32), c) an x=zero sensor (34, 36), d) a y-axis (42) supported by the x-carriage (28), e) a y-carriage (44) movable along the y-axis (42) by means of a y-electric motor (46), e) a y=zero sensor (48, 50), and a z-axis (56) supported by the y-carriage (44), - a high-pressure unit with more than one high-pressure hose (58), with a displacement sensor (66) assigned to each high-pressure hose (58) for detecting the hose movement, with a guide unit (62) attached to the z-axis (56) is arranged, with one lower stop (68) for each high-pressure hose (58) and one upper stop (70) for each,which is preferably arranged on the side of the guide unit (62) opposite the nozzle (61), - a camera (72) which is detachably arranged on the z-axis (56), has a control unit which is connected to the camera (72), the high-pressure unit, the electric motors (32, 46), the displacement sensors (66) and the zero sensors (34, 36, 48, 50) and which includes a data processing unit (78).