Viscous Fluid Pumping with Adjustable Hydraulic Transmission Ratios
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Solution Overview
Problem
Existing devices for conveying thick matter, such as mortars, cements, and concretes, face challenges in achieving optimal and safe conveying due to limitations in controlling delivery pressure and volume flow, leading to potential wear and tear on components and inefficiencies in operation.
Innovation Solution
A device with a drive cylinder, delivery cylinder, and piston rod system that allows for adjustable connection of hydraulic fluid flow through rod-side and bottom-side passages, enabling different transmission ratios and operating modes for high-pressure or high-volume delivery, controlled by a sensor device and control unit for autonomous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hydraulic fluid is supplied only to the rod-side passage, then the device operates in rod-side mode with limited delivery pressure, but the transmission ratio is fixed and delivery pressure cannot be optimized for different applications
Solution Approach 1:
The device enables dynamic switching between rod-side operating mode and bottom-side operating mode by providing variable connection of the drive pump to either the rod-side passage or the bottom-side passage. This allows the transmission ratio to be changed according to different conveying requirements, optimizing delivery pressure and volume flow for various applications without requiring multiple fixed-ratio devices.
2Productivity
If the device operates at high delivery pressure, then optimal conveying performance is achieved, but component stress increases reducing service life
Solution Approach 1:
The device allows changing the operating parameters by switching between rod-side mode and bottom-side mode. In rod-side mode, the delivery pressure can be limited to reduce component stress and extend service life. In bottom-side mode, optimized delivery pressure can be achieved for optimal conveying performance. The control unit automatically adjusts parameters based on the detected operating mode.
3Adaptability or versatility
If the device allows variable connection between drive pump and passages, then delivery pressure and volume flow can be optimized, but the system requires complex sensor detection and control mechanisms
Solution Approach 1:
The device incorporates sensor devices that automatically detect which passage (rod-side or bottom-side) is connected to the drive pump. Based on this detection, the control unit automatically controls the device operation in the corresponding operating mode. This feedback mechanism simplifies the user interface while maintaining the ability to optimize delivery pressure and volume flow for different applications.
4Productivity
If the device uses fixed transmission ratio, then the structure is simpler, but the delivery pressure and volume flow cannot be adjusted for different conveying requirements
Solution Approach 1:
The device achieves multi-functionality by enabling operation in both rod-side operating mode and bottom-side operating mode through variable connection of the drive pump. This allows a single device to handle different conveying requirements (different delivery pressures and volume flows) that would otherwise require multiple specialized devices, improving conveying efficiency across various applications.
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 safe and optimal conveying by allowing adjustable delivery pressure and volume flow with reduced component stress, preventing negative effects on the device's service life and allowing for continuous operation in low-pressure modes.
Implementation Method 1
The drive cylinder (10a, 10b) is designed to receive hydraulic fluid (HF) and in particular to receive the hydraulic fluid (HF) from the drive pump (20) via a pump connection (30a, 30b)
Implementation Method 2
The sensor device (40) is designed for independent or automatic detection or recognition of whether the pump connection (30a, 30b) is connected to the rod-side passage (SDa, SDb) or to the bottom-side passage (BDa, BDb)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an apparatus (1) for conveying thick matter (DS), having: - at least one drive cylinder (10a, 10b) for receiving hydraulic fluid (HF), at least one drive piston (11a, 11b), which is arranged in the drive cylinder (10a, 10b), at least one conveying cylinder (12a, 12b) for receiving thick matter (DS), at least one conveying piston (13a, 13b), which is arranged in the conveying cylinder (12a, 12b), and at least one piston rod (14a, 14b), which is fastened to the drive piston (11a, 11b) for coupling motion together with the conveying piston (13a, 13b), - wherein the drive cylinder (10a, 10b) has a rod-side opening (SDa, SDb) for applying pressure to a rod side (SKa, SKb) of the drive piston (11a, 11b) by means of hydraulic fluid (HF) and a floor-side opening (BDa, BDb) for applying pressure to a floor side (BKa, BKb) of the drive piston (11a, 11b) facing away from the rod side (SKa, SKb) by means of hydraulic fluid (HF), - a drive pump (20), which is designed to generate a drive volume flow (AVF) having a drive pressure (pA) of hydraulic fluid (HF) for moving the drive piston (11a, 11b), - at least one pump connection (30a, 30b), which is designed for variable connection of the drive pump (20) to the rod-side opening (SDa, SDb) or the floor-side opening (BDa, BDb) for the flow of hydraulic fluid (HF), - a sensor device (40), which is designed for automatic detection of whether the pump connection (30a, 30b) is connected to the rod-side opening (SDa, SDb) or the floor-side opening (BDa, BDb), and - a control unit (50), which is designed to control the apparatus (1) in a rod-side operating mode, when the rod-side pump connection is detected, and in a floor-side operating mode, when the floor-side pump connection is detected.