Suck Back Valve Suction Amount Adjustment Mechanism
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Solution Overview
Problem
Conventional suck back valves lack the ability to arbitrarily adjust and reset the suction amount of liquid, making it inconvenient for operators to adapt to different types and flow rates of discharge liquids.
Innovation Solution
The suck back valve incorporates a suction amount-adjusting mechanism, including a stepping motor and a screw member with a stopper section, allowing for precise control of the diaphragm's displacement and thus the suction amount, using a position detection sensor and control unit for feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional suck back valve is used without an adjustment mechanism, then the structure remains simple, but the suction amount cannot be arbitrarily adjusted or reset
Solution Approach 1:
The invention applies the dynamics principle by making the diaphragm displacement amount adjustable through a screw member that can be rotated to change the position of the stopper section. This allows the suction amount to be dynamically adjusted according to different discharge liquid characteristics, transforming a fixed-configuration valve into an adaptable system that can respond to varying operational requirements.
Solution Approach 2:
The invention uses the stopper section as an intermediary element between the diaphragm and the screw member. The stopper section transmits the rotational adjustment of the screw member into linear displacement control of the diaphragm, enabling precise control of the suction amount without requiring direct mechanical coupling between the adjustment mechanism and the diaphragm.
2Ease of operation
If the suction amount is fixed in the valve design, then manufacturing is simpler, but operators cannot adapt to different types and flow rates of discharge liquids
Solution Approach 1:
The invention applies preliminary action by pre-configuring the screw member and stopper section mechanism that enables adjustment. Operators can quickly adapt the valve to different discharge liquids by simply rotating the screw member to the appropriate position, without requiring complex recalibration procedures or specialized training, thus improving ease of operation.
3Adaptability or versatility
If no adjustment mechanism is provided, then the valve structure remains simple and reliable, but the suction amount cannot be reset after initial setting
Solution Approach 1:
The invention replaces complex mechanical adjustment systems with a simpler threaded screw mechanism. The screw member converts rotational motion into linear displacement of the stopper section, providing a reliable and repeatable method for adjusting and resetting the suction amount. This mechanical substitution maintains reliability while enabling the desired adaptability.
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 flexible adjustment and resetting of the suction amount, improving the versatility and convenience of the suck back valve by allowing operators to set the suction amount according to specific discharge liquid characteristics.
Implementation Method 1
A coil spring 13, which urges the second diaphragm 11 upwardly, is installed between the first diaphragm 8 and the second diaphragm 11.
Implementation Method 2
the first diaphragm 8 is moved upwardly integrally with the second diaphragm 11 and the vertically movable member 10 to a state shown by a solid line in FIG. 9. As a result, the first diaphragm 8 is deformed, and the volume of the flow chamber 4 is increased. Accordingly, the discharge liquid contained in the nozzle is sucked.
Data Source
AI summary
A suck back valve comprises a suction amount-adjusting mechanism including a screw member which regulates a displacement amount of a second piston integrally displaceable with a second diaphragm in accordance with abutment of a disk-shaped member, a rotary driving section which allows the screw member to move toward or away from the disk-shaped member, and a detecting section which detects a displacement amount of the screw member. Accordingly, it is possible to appropriately adjust the flow rate of the pressure fluid to be sucked under the negative pressure action of the second diaphragm.