Integrated Hydraulic Valve Block for Tipper Cylinder Control
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Solution Overview
Problem
The existing hydraulic control systems for single-acting tipper cylinders are complex, cumbersome, and prone to mechanical wear, failing to respond effectively to internal pressure signals when encountering obstacles, leading to inefficient use of space and potential hydraulic medium stress.
Innovation Solution
A compact, purely hydraulic control system integrated into a single block, utilizing a circulation seat valve and hydraulically piloted check valve, with optional external pressure signal input, and electro-hydraulic actuation via solenoid switching valves for sensitive control, eliminating mechanical interfaces prone to wear and allowing direct response to internal or external pressure signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-part hydraulic control system with mechanical button and separate valve blocks is used, then the system can control the tipper cylinder, but the installation space requirement increases and mechanical wear occurs
Solution Approach 1:
The patent combines multiple separate hydraulic components (check valve, seat valve, control elements) into a single integrated valve block. This merging eliminates the need for multiple separate valve blocks and mechanical connections, reducing the number of parts while maintaining control functionality. The integration directly addresses the contradiction by reducing device complexity without compromising reliability.
Solution Approach 2:
The patent replaces the mechanical button activation system with a purely hydraulic control mechanism. Instead of using a mechanical button that physically unlocks a check valve, the system uses hydraulic pressure signals to control the seat valve and check valve operation. This substitution eliminates mechanical interfaces prone to wear and contamination, directly improving reliability while simplifying the overall system structure.
2Reliability
If a mechanical button is used to unlock the check valve, then the system can respond to the tilting position, but the button is subject to heavy wear and tends to malfunction due to contamination
Solution Approach 1:
The patent replaces the mechanical button activation system with a purely hydraulic control mechanism. Instead of using a mechanical button that physically unlocks a check valve, the system uses hydraulic pressure signals to control the seat valve and check valve operation. This substitution eliminates mechanical interfaces prone to wear and contamination, directly improving reliability while simplifying the overall system structure.
Solution Approach 2:
The patent uses hydraulic pressure signals from the working line to directly actuate the seat valve and control the check valve operation. The hydraulic system responds to pressure changes generated by the tipper cylinder itself, eliminating the need for mechanical buttons or external mechanical interfaces. This hydraulic approach ensures reliable operation even in contaminated environments.
3Reliability
If the button only responds immediately before the end position is reached, then the hydraulic control can prevent over-extension, but the system does not react to internal pressure signals when the bridge collides with an obstacle
Solution Approach 1:
The patent implements a feedback mechanism where the hydraulic control system continuously monitors the pressure in the working line. When the tipper cylinder encounters an obstacle or reaches the end position, the pressure change is automatically detected and fed back to the seat valve, which then responds by opening to release pressure and stop the cylinder. This automatic feedback response eliminates the need for delayed mechanical button activation and ensures immediate response to any pressure changes.
Solution Approach 2:
The hydraulic control system uses the internal pressure signals from the tipper cylinder itself to trigger the control action. The pressure changes generated during normal operation or obstacle collision automatically activate the seat valve without requiring external mechanical intervention. This self-service approach ensures the system responds to all pressure signals, including those from obstacle collisions, while simplifying the control mechanism.
4Reliability
If the pressure source delivers against the system pressure relief valve due to lack of response, then the tipper cylinder stops, but high mechanical and thermal stress occurs on the hydraulic medium
Solution Approach 1:
The patent implements a feedback mechanism where the hydraulic control system continuously monitors the pressure in the working line. When the tipper cylinder encounters an obstacle or reaches the end position, the pressure change is automatically detected and fed back to the seat valve, which then responds by opening to release pressure and stop the cylinder. This automatic feedback response prevents pressure buildup and eliminates the need for the pressure relief valve to handle excessive loads, reducing stress on the hydraulic medium.
Solution Approach 2:
The hydraulic control system is designed to detect pressure changes and activate the seat valve before the pressure reaches dangerous levels that would require the pressure relief valve to open. By monitoring pressure continuously and responding proactively to pressure increases, the system prevents the need for high-pressure relief operations, thereby reducing mechanical and thermal stress on the hydraulic medium.
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 system provides a structurally simple, compact, and responsive hydraulic control that effectively manages tipper cylinder extension and retraction, reducing mechanical stress and wear, while ensuring reliable operation even when encountering unforeseen resistance.
Implementation Method 1
The circulating seat valve (10) is used, for example, to slowly extend the tipper cylinder (Z)
Implementation Method 2
the hydraulically piloted non-return valve (R) is integrated into the closing element (10) of the circulating seat valve (10)
Implementation Method 3
electro-hydraulic actuation via solenoid switching valves for sensitive control
Data Source
Figure 1
Figure 2~5
Figure 6
AI summary
The hydraulic control unit (H) has seat valve (S) which is provided between pressure line (1) and working duct (32) of tipper cylinder (Z), attached with pressure source (P). The pilot-operated check valve (R) is provided in the unlocking terminals (17,17') for unlocking the circulation-seat valve (U) based on operating situation of the tipper cylinder. A pressure relief valve (D) is provided in bypass pipe (19) between the pressure line and tank line (2). The seat valve, circulating-seat valve, check valve and pressure relief valve are accommodated in a common block.