Nested Rotary Slide Valve for Hydraulic Hammer
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Solution Overview
Problem
Hydraulic impact mechanisms require significant installation space and manufacturing costs due to the need for multiple valves and complex valve configurations to control stroke length and empty stroke protection, leading to large external dimensions, high weight, and high manufacturing costs.
Innovation Solution
A rotary slide valve design that nests a secondary valve within a main valve, reducing the number of mounting holes and hydraulic connections, allowing for integrated control of stroke switching and empty stroke protection functions, thereby minimizing space and manufacturing effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two separate valves are used for stroke switching and empty stroke protection, then the control functions are independent and versatile, but the installation space, weight, and manufacturing costs increase significantly
Solution Approach 1:
The patent combines two separate valves (stroke switching valve and empty stroke protection valve) into a single integrated valve unit. The main valve body houses both the stroke switching function and the empty stroke protection function, eliminating the need for two separate valve assemblies. This merging reduces the overall weight, installation space, and number of mounting holes while maintaining both control functions independently through internal valve elements.
Solution Approach 2:
The patent implements a nested valve configuration where a secondary valve element (empty stroke protection valve) is positioned within or alongside the main valve body (stroke switching valve). The secondary valve is integrated into the main valve's structure, sharing common mounting holes and hydraulic connections. This nesting approach allows both valves to coexist in a compact arrangement, reducing the external dimensions and weight compared to two separate valve installations.
2Adaptability or versatility
If two separate valves are used for stroke switching and empty stroke protection, then the control functions are independent, but the number of mounting holes and hydraulic connections increases
Solution Approach 1:
The patent merges the mounting structures of two separate valves into a single integrated valve assembly. The main valve body contains mounting holes that serve both the stroke switching function and the empty stroke protection function. This reduces the total number of mounting holes required in the hammer body and minimizes the number of hydraulic connections needed, simplifying the overall system installation and reducing leakage points.
Solution Approach 2:
The main valve body is designed as a multi-functional component that performs both stroke switching and empty stroke protection functions. By making the valve assembly universal, it eliminates the need for separate dedicated mounting structures and hydraulic lines for each function. The same valve body and connection points serve multiple purposes, reducing device complexity.
3Weight of stationary object
If a single valve controls both stroke switching and empty stroke protection, then the installation space and manufacturing costs are reduced, but the stroke length and piston travel cannot be freely selected
Solution Approach 1:
The patent combines stroke switching and empty stroke protection functions in a single valve assembly, reducing weight and installation space. However, it maintains adaptability through internal design features that allow independent control of stroke parameters.
Solution Approach 2:
The integrated valve contains separate internal valve elements for stroke switching and empty stroke protection. The stroke switching valve element controls the main stroke length, while the empty stroke protection valve element independently controls the shutdown position. This segmentation within the integrated structure allows both functions to operate independently, maintaining the ability to freely select stroke parameters.
4Reliability
If multiple separate valves are installed, then the control functions are comprehensive, but the external dimensions and manufacturing costs increase
Solution Approach 1:
The patent merges multiple separate valves into a single integrated valve unit that provides comprehensive control functions including stroke switching and empty stroke protection. This consolidation significantly reduces the external dimensions of the hammer by eliminating the space required for multiple separate valve installations, while maintaining complete control functionality through internal valve elements.
Solution Approach 2:
The patent uses a nested valve configuration where secondary valve elements are positioned within the main valve body. This nesting arrangement provides comprehensive control functions in a compact package, reducing the hammer's external dimensions while ensuring all necessary control functions are available for reliable operation.
Data Source
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AI summary
The present invention relates to a valve for a hydraulically operated percussion mechanism having a main valve (2, 102) which is in the form of a rotary slide valve having a rotary slide. In order to reduce the installation space and the production costs of such valves, it is proposed according to the invention that the rotary slide is configured as a receiving housing which receives a valve element in the form of a secondary valve (68, 114). Furthermore, the invention relates to the use of a valve which is arranged on a percussion mechanism of a hydraulic hammer.