Pump Apparatus Mechanical Linkage for Passage Switching
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Solution Overview
Problem
Conventional pump apparatuses require initial adjustments to discharge air and establish liquid pressure, leading to inefficiencies and complexity, especially when starting the pumping operation with air present in the system.
Innovation Solution
A pump apparatus with a simplified structure featuring a link mechanism that connects the piston rod to a plunger, allowing for reciprocation and passage switching without relying on pressure pipes, enabling smooth operation even with insufficient liquid pressure and reducing the need for manual adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional switching valve with pressure pipes is used to switch passages based on liquid pressure, then passage switching can be achieved, but the device complexity increases and initial adjustments are required to establish sufficient liquid pressure
Solution Approach 1:
The patent replaces the hydraulic control system (pressure pipes relying on liquid pressure) with a direct mechanical linkage system. The connecting rod mechanically connects the piston rod to the plunger, transmitting mechanical motion directly without requiring pressure pipes or sufficient liquid pressure buildup. This eliminates the need for initial adjustments to establish liquid pressure while reducing structural complexity.
2Device complexity
If pressure pipes are used to transmit liquid pressure for operating the switching valve, then passage switching is enabled, but the pump's size and complexity increase
Solution Approach 1:
The patent substitutes the hydraulic pressure transmission system with a direct mechanical linkage. The connecting rod provides rigid mechanical connection between the piston rod and plunger, ensuring reliable actuation of the switching valve through direct mechanical force transmission rather than relying on liquid pressure through pipes.
Solution Approach 2:
The connecting rod serves as a mechanical intermediary that directly transmits the reciprocating motion of the piston rod to the plunger of the switching valve. This mechanical intermediary eliminates the need for pressure pipes while ensuring reliable and timely passage switching through direct force transmission.
3Productivity
If initial adjustments are required to discharge air and establish liquid pressure, then proper pumping operation can be achieved, but the productivity decreases due to additional time and steps
Solution Approach 1:
By replacing the pressure-dependent hydraulic control system with a direct mechanical linkage system, the patent eliminates the need for initial air discharge and liquid pressure establishment steps. The mechanical connecting rod ensures immediate and reliable actuation of the switching valve from the start of operation, significantly improving productivity by removing preliminary adjustment steps.
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 normal pumping operation without initial adjustments, reduces the pump's size and complexity, ensures reliable passage switching, and allows for easy maintenance by eliminating the need for pressure pipes, thus achieving high pressure with low driving pressure.
Implementation Method 1
a piston (3) reciprocating in the cylinder (2)
Implementation Method 2
a plunger (32) reciprocating in the sub-cylinder (31) to switch the passage
Implementation Method 3
a link mechanism comprising a connecting rod (41) projecting outward from the sub-cylinder (31), and a connecting bar (44) connecting the piston rod (4) and the connecting rod (41)
Data Source
AI summary
In a pump apparatus of the present invention, a portion of fluid sent to a fluid-sending destination is circulated to a pumping driving chamber on one side of a cylinder through a circulation passage. The pump apparatus includes a switching valve which switches inflow and outflow of the circulated fluid with respect to the pumping driving chamber. The switching valve is connected to a piston rod through a link mechanism, and mechanically carries out the switching operation using a pumping driving force.