Down-the-hole hammer control tube for pressure adjustment
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Solution Overview
Problem
Existing down-the-hole hammers require significant disassembly to adjust the operation pressure, making it time-consuming and labor-intensive.
Innovation Solution
A down-the-hole hammer design featuring a control tube that is indexable between multiple rotational positions, allowing alignment with different air distributor ports to adjust air consumption, thereby controlling the operation pressure without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the volume-changer is made removable to adjust operation pressure, then the adaptability is improved, but the device complexity increases and requires significant disassembly
Solution Approach 1:
The control tube is nested within the barrel and can rotate to align different ports with the air supply passage. This nested configuration allows multiple air consumption settings to be integrated within a single compact structure, eliminating the need for removable volume-changers and significant disassembly while maintaining adaptability for pressure adjustment
2Ease of operation
If the volume-changer is made removable for adjustment, then the ease of operation is improved, but the loss of time increases due to disassembly
Solution Approach 1:
The control tube is designed to be dynamically adjustable through rotation, allowing operators to switch between different air consumption settings by simply rotating the tube to align different ports. This dynamic adjustment mechanism eliminates the time-consuming disassembly and reassembly process while maintaining ease of operation for pressure adjustment
3Adaptability or versatility
If multiple air distributor ports are provided for different air flow rates, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The air distributor is designed with multiple ports that can serve different air flow rate requirements. By combining multiple functions (different air flow rates) into a single air distributor component, the design achieves versatility without proportionally increasing overall device complexity, as all ports are integrated into one structure rather than requiring separate components
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
Enables quick and efficient adjustment of air consumption and operation pressure, improving the operational efficiency and reducing the time and labor required for setup.
Implementation Method 1
Down-the-hole hammers typically produce a hammering action by pneumatic or hydraulic action, with the motive fluid (e.g. air, water, or drilling mud) being supplied down the drill string to the hammer
Data Source
AI summary
A down-the-hole hammer includes a barrel having a longitudinal axis and defining a middle chamber and a bottom chamber, a piston defining a top chamber and slidable within the barrel between the middle chamber and the bottom chamber, a control tube having a distal port, and an air distributor having a first distal port and a second distal port. The control tube is indexable between a plurality of rotational positions to adjust which of the first distal port and the second distal port of the air distributor is aligned with the distal port of the control tube.