Push-Type Nozzle Assembly Leakage Prevention
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Solution Overview
Problem
Conventional push-type nozzle assemblies experience leakage issues during use and transportation due to liquid flow through gaps when the bottle tilts, leading to residue accumulation and increased risk of leakage.
Innovation Solution
A push-type nozzle assembly featuring a cylinder with a recess containing a check valve, a hollow plunger, and a spring-actuated piston system that creates a vacuum suction force to seal the nozzle and prevent leakage, including a rotating member, locking mechanism, and suction valve to manage liquid flow and prevent backflow into the bottle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the push head is pushed to open the passage for liquid ejection, then liquid can be ejected from the nozzle, but liquid leaks from the passage or other gaps when the bottle tilts
Solution Approach 1:
The check valve is pre-installed in the recess to open and close the entrance automatically. When the bottle tilts, the check valve closes the entrance before liquid can leak through the passage, providing preliminary anti-action against leakage while maintaining ejection functionality when pushed.
Solution Approach 2:
The check valve acts as an intermediary component between the passage and the recess. It mediates liquid flow by opening to allow ejection when pushed and closing to prevent leakage when tilted, resolving the contradiction between ejection and leakage prevention.
2Ease of operation
If the push head is released after use, then the nozzle returns to its original position, but liquid residue remains in the outlet and flows due to gravity
Solution Approach 1:
The suction valve replaces the purely mechanical gravity-driven residue flow with a controlled valve mechanism. When the push head returns to its original position, the suction valve automatically closes to prevent gravity-driven residue flow, eliminating liquid loss while maintaining ease of operation.
Solution Approach 2:
The suction valve provides self-service by automatically closing when the push head returns to its original position, preventing residue flow without requiring additional user action. This eliminates liquid residue loss while maintaining the ease of operation of simply pushing and releasing the nozzle.
3Productivity
If air releasing holes are provided in the cylinder, then air can be released during operation, but liquid flows into the cylinder via these holes when the bottle tilts and accumulates at the piston
Solution Approach 1:
The locking member provides local quality by creating a sealed region around the piston area. When engaged, it prevents liquid from entering through the air releasing holes by providing a localized seal at the critical area, while still allowing air release functionality to operate.
Solution Approach 2:
The locking member provides beforehand cushioning by preventing liquid accumulation at the piston before it can cause leakage problems. It creates a protective barrier that cushions against the harmful effect of liquid entering through air releasing holes during tilting.
4Reliability
If a locking mechanism is added to secure the push head, then leakage during transportation is prevented, but the device complexity increases
Solution Approach 1:
The locking mechanism is merged with the existing push head structure. The locking portions are integrated into the push head and locking member components that already exist in the system, providing leakage prevention during transport without adding significant structural complexity.
Solution Approach 2:
The locking member serves multiple functions: it provides leakage prevention during transport, maintains the sealed region around the piston, and works with the existing push head structure. This multi-functionality reduces the need for separate dedicated locking components, thereby limiting the increase in device complexity.
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 design effectively seals the nozzle, preventing liquid leakage from the bottle even when tilted, and ensures efficient ejection and retraction of liquid, minimizing residue and ensuring reliable operation during use and transport.
Implementation Method 1
A spring is mounted to the piston rod so as to create a spring force for returning
Implementation Method 2
the piston moves back by the spring to create a vacuum suction force... the vacuum suction force sucks the liquid left in the nozzle back
Implementation Method 3
A check valve is located in the recess to open and close the entrance
Data Source
AI summary
A push-type nozzle assembly includes a cylinder, a check valve, a plunger, a piston, a spring, a rotating member, a locking member, an upper push rod, a suction valve and a push head. When pushing the push head downward, and the outer chamber contact the locking member, the liquid in the cylinder is pushed out. When releasing the push head, the piston moves back by the spring to create a vacuum suction force to suck the liquid left in the nozzle back. When the outer chamber locks with the locking member, the bottom end of the piston rod seals the plunger to seal the cylinder so as to prevent leakage. When the outer chamber is separated from the locking member, the upper push rod seals the suction valve to avoid liquid from leakage. The inlet valve avoids the liquid from being accumulated in the cylinder and the top of the piston.